Squashed 'includes/libraries/action-scheduler/' content from commit 5f943d9

git-subtree-dir: includes/libraries/action-scheduler
git-subtree-split: 5f943d9de5f25f5a107ea21b8d42eff9ed9bf94e

.gitattributes

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+docs export-ignore
+tests export-ignore
+codecov.yml export-ignore
+.github export-ignore
+.travis.yml export-ignore
+.gitattributes export-ignore
+.gitignore export-ignore
+phpunit.xml.dist export-ignore
+

.github/release-drafter.yml

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+template: |
+  ## next release – date
+
+  <!-- Move the individual changes below into the appropriate section -->
+
+  $CHANGES
+
+  **Added**
+  **Changed**
+  **Deprecated**
+  **Removed**
+  **Fixed**
+  **Security**
+
+change-template: '* $TITLE (PR #$NUMBER)'

.gitignore

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+phpunit.xml
+vendor
+.idea

.travis.yml

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+# Travis CI Configuration File
+
+# Tell Travis CI we're using PHP
+language: php
+
+# We nee to use Precise, not Trusty, to test against PHP 5.3, see https://github.com/travis-ci/travis-ci/issues/8219
+dist: precise
+
+# Versions of PHP to test against
+php:
+    - "5.3"
+    - "5.4"
+    - "5.5"
+    - "5.6"
+    - "7.0"
+    - "7.1"
+
+# Specify versions of WordPress to test against
+# WP_VERSION = WordPress version number (use "master" for SVN trunk)
+# WP_MULTISITE = whether to test multisite (use either "0" or "1")
+env:
+    - WP_VERSION=4.8 WP_MULTISITE=0
+    - WP_VERSION=4.7 WP_MULTISITE=0
+    - WP_VERSION=4.6 WP_MULTISITE=0
+    - WP_VERSION=4.8 WP_MULTISITE=1
+    - WP_VERSION=4.7 WP_MULTISITE=1
+    - WP_VERSION=4.6 WP_MULTISITE=1
+
+# Grab the setup script and execute
+before_script:
+    - source tests/travis/setup.sh $TRAVIS_PHP_VERSION
+
+script:
+ - if [[ "$TRAVIS_PHP_VERSION" == "7.1" ]] && [[ "$WP_VERSION" == "4.8" ]] && [[ "$WP_MULTISITE" == "0" ]] && [[ "$TRAVIS_BRANCH" == "master" ]]; then phpunit --configuration tests/phpunit.xml.dist --coverage-clover clover.xml; else phpunit --configuration tests/phpunit.xml.dist; fi
+
+after_script:
+  - bash <(curl -s https://codecov.io/bash)

README.md

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+# Action Scheduler - Job Queue for WordPress [![Build Status](https://travis-ci.org/Prospress/action-scheduler.png?branch=master)](https://travis-ci.org/Prospress/action-scheduler) [![codecov](https://codecov.io/gh/Prospress/action-scheduler/branch/master/graph/badge.svg)](https://codecov.io/gh/Prospress/action-scheduler)
+
+Action Scheduler is a scalable, traceable job queue for background processing large sets of actions in WordPress. It's specially designed to be distributed in WordPress plugins.
+
+Action Scheduler works by triggering an action hook to run at some time in the future. Each hook can be scheduled with unique data, to allow callbacks to perform operations on that data. The hook can also be scheduled to run on one or more occassions.
+
+Think of it like an extension to `do_action()` which adds the ability to delay and repeat a hook.
+
+## Battle-Tested Background Processing
+
+Every month, Action Scheduler processes millions of payments for [Subscriptions](https://woocommerce.com/products/woocommerce-subscriptions/), webhooks for [WooCommerce](https://wordpress.org/plugins/woocommerce/), as well as emails and other events for a range of other plugins.
+
+It's been seen on live sites processing queues in excess of 50,000 jobs and doing resource intensive operations, like processing payments and creating orders, at a sustained rate of over 10,000 / hour without negatively impacting normal site operations.
+
+This is all on infrastructure and WordPress sites outside the control of the plugin author.
+
+If your plugin needs background processing, especially of large sets of tasks, Action Scheduler can help.
+
+## Learn More
+
+To learn more about how to Action Scheduler works, and how to use it in your plugin, check out the docs on [ActionScheduler.org](https://actionscheduler.org).
+
+There you will find:
+
+* [Usage guide](https://actionscheduler.org/usage/): instructions on installing and using Action Scheduler
+* [WP CLI guide](https://actionscheduler.org/wp-cli/): instructions on running Action Scheduler at scale via WP CLI
+* [API Reference](https://actionscheduler.org/api/): complete reference guide for all API functions
+* [Administration Guide](https://actionscheduler.org/admin/): guide to managing scheduled actions via the administration screen
+* [Guide to Background Processing at Scale](https://actionscheduler.org/perf/): instructions for running Action Scheduler at scale via the default WP Cron queue runner
+
+## Credits
+
+Action Scheduler is developed and maintained by [Prospress](http://prospress.com/) in collaboration with [Flightless](https://flightless.us/).
+
+Collaboration is cool. We'd love to work with you to improve Action Scheduler. [Pull Requests](https://github.com/prospress/action-scheduler/pulls) welcome.
+
+---
+
+<p align="center">
+<img src="https://cloud.githubusercontent.com/assets/235523/11986380/bb6a0958-a983-11e5-8e9b-b9781d37c64a.png" width="160">
+</p>

action-scheduler.php

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+<?php
+/*
+ * Plugin Name: Action Scheduler
+ * Plugin URI: https://actionscheduler.org
+ * Description: A robust scheduling library for use in WordPress plugins.
+ * Author: Prospress
+ * Author URI: http://prospress.com/
+ * Version: 2.2.3
+ * License: GPLv3
+ *
+ * Copyright 2019 Prospress, Inc.  (email : freedoms@prospress.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+if ( ! function_exists( 'action_scheduler_register_2_dot_2_dot_3' ) ) {
+
+	if ( ! class_exists( 'ActionScheduler_Versions' ) ) {
+		require_once( 'classes/ActionScheduler_Versions.php' );
+		add_action( 'plugins_loaded', array( 'ActionScheduler_Versions', 'initialize_latest_version' ), 1, 0 );
+	}
+
+	add_action( 'plugins_loaded', 'action_scheduler_register_2_dot_2_dot_3', 0, 0 );
+
+	function action_scheduler_register_2_dot_2_dot_3() {
+		$versions = ActionScheduler_Versions::instance();
+		$versions->register( '2.2.3', 'action_scheduler_initialize_2_dot_2_dot_3' );
+	}
+
+	function action_scheduler_initialize_2_dot_2_dot_3() {
+		require_once( 'classes/ActionScheduler.php' );
+		ActionScheduler::init( __FILE__ );
+	}
+
+}

classes/ActionScheduler.php

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+<?php
+
+/**
+ * Class ActionScheduler
+ * @codeCoverageIgnore
+ */
+abstract class ActionScheduler {
+	private static $plugin_file = '';
+	/** @var ActionScheduler_ActionFactory */
+	private static $factory = NULL;
+
+	public static function factory() {
+		if ( !isset(self::$factory) ) {
+			self::$factory = new ActionScheduler_ActionFactory();
+		}
+		return self::$factory;
+	}
+
+	public static function store() {
+		return ActionScheduler_Store::instance();
+	}
+
+	public static function logger() {
+		return ActionScheduler_Logger::instance();
+	}
+
+	public static function runner() {
+		return ActionScheduler_QueueRunner::instance();
+	}
+
+	public static function admin_view() {
+		return ActionScheduler_AdminView::instance();
+	}
+
+	/**
+	 * Get the absolute system path to the plugin directory, or a file therein
+	 * @static
+	 * @param string $path
+	 * @return string
+	 */
+	public static function plugin_path( $path ) {
+		$base = dirname(self::$plugin_file);
+		if ( $path ) {
+			return trailingslashit($base).$path;
+		} else {
+			return untrailingslashit($base);
+		}
+	}
+
+	/**
+	 * Get the absolute URL to the plugin directory, or a file therein
+	 * @static
+	 * @param string $path
+	 * @return string
+	 */
+	public static function plugin_url( $path ) {
+		return plugins_url($path, self::$plugin_file);
+	}
+
+	public static function autoload( $class ) {
+		$d = DIRECTORY_SEPARATOR;
+		if ( 'Deprecated' === substr( $class, -10 ) ) {
+			$dir = self::plugin_path('deprecated'.$d);
+		} elseif ( strpos( $class, 'ActionScheduler' ) === 0 ) {
+			$dir = self::plugin_path('classes'.$d);
+		} elseif ( strpos( $class, 'CronExpression' ) === 0 ) {
+			$dir = self::plugin_path('lib'.$d.'cron-expression'.$d);
+		} else {
+			return;
+		}
+
+		if ( file_exists( "{$dir}{$class}.php" ) ) {
+			include( "{$dir}{$class}.php" );
+			return;
+		}
+	}
+
+	/**
+	 * Initialize the plugin
+	 *
+	 * @static
+	 * @param string $plugin_file
+	 */
+	public static function init( $plugin_file ) {
+		self::$plugin_file = $plugin_file;
+		spl_autoload_register( array( __CLASS__, 'autoload' ) );
+
+		/**
+		 * Fires in the early stages of Action Scheduler init hook.
+		 */
+		do_action( 'action_scheduler_pre_init' );
+
+		$store = self::store();
+		add_action( 'init', array( $store, 'init' ), 1, 0 );
+
+		$logger = self::logger();
+		add_action( 'init', array( $logger, 'init' ), 1, 0 );
+
+		$runner = self::runner();
+		add_action( 'init', array( $runner, 'init' ), 1, 0 );
+
+		$admin_view = self::admin_view();
+		add_action( 'init', array( $admin_view, 'init' ), 0, 0 ); // run before $store::init()
+
+		require_once( self::plugin_path('functions.php') );
+
+		if ( apply_filters( 'action_scheduler_load_deprecated_functions', true ) ) {
+			require_once( self::plugin_path('deprecated/functions.php') );
+		}
+
+		if ( defined( 'WP_CLI' ) && WP_CLI ) {
+			WP_CLI::add_command( 'action-scheduler', 'ActionScheduler_WPCLI_Scheduler_command' );
+		}
+	}
+
+
+	final public function __clone() {
+		trigger_error("Singleton. No cloning allowed!", E_USER_ERROR);
+	}
+
+	final public function __wakeup() {
+		trigger_error("Singleton. No serialization allowed!", E_USER_ERROR);
+	}
+
+	final private function __construct() {}
+
+	/** Deprecated **/
+
+	public static function get_datetime_object( $when = null, $timezone = 'UTC' ) {
+		_deprecated_function( __METHOD__, '2.0', 'wcs_add_months()' );
+		return as_get_datetime_object( $when, $timezone );
+	}
+}

classes/ActionScheduler_Abstract_ListTable.php

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+<?php
+
+if ( ! class_exists( 'WP_List_Table' ) ) {
+	require_once( ABSPATH . 'wp-admin/includes/class-wp-list-table.php' );
+}
+
+/**
+ * Action Scheduler Abstract List Table class
+ *
+ * This abstract class enhances WP_List_Table making it ready to use.
+ *
+ * By extending this class we can focus on describing how our table looks like,
+ * which columns needs to be shown, filter, ordered by and more and forget about the details.
+ *
+ * This class supports:
+ *	- Bulk actions
+ *	- Search
+ *  - Sortable columns
+ *  - Automatic translations of the columns
+ *
+ * @codeCoverageIgnore
+ * @since  2.0.0
+ */
+abstract class ActionScheduler_Abstract_ListTable extends WP_List_Table {
+
+	/**
+	 * The table name
+	 */
+	protected $table_name;
+
+	/**
+	 * Package name, used in translations
+	 */
+	protected $package;
+
+	/**
+	 * How many items do we render per page?
+	 */
+	protected $items_per_page = 10;
+
+	/**
+	 * Enables search in this table listing. If this array
+	 * is empty it means the listing is not searchable.
+	 */
+	protected $search_by = array();
+
+	/**
+	 * Columns to show in the table listing. It is a key => value pair. The
+	 * key must much the table column name and the value is the label, which is
+	 * automatically translated.
+	 */
+	protected $columns = array();
+
+	/**
+	 * Defines the row-actions. It expects an array where the key
+	 * is the column name and the value is an array of actions.
+	 *
+	 * The array of actions are key => value, where key is the method name
+	 * (with the prefix row_action_<key>) and the value is the label
+	 * and title.
+	 */
+	protected $row_actions = array();
+
+	/**
+	 * The Primary key of our table
+	 */
+	protected $ID = 'ID';
+
+	/**
+	 * Enables sorting, it expects an array
+	 * of columns (the column names are the values)
+	 */
+	protected $sort_by = array();
+
+	protected $filter_by = array();
+
+	/**
+	 * @var array The status name => count combinations for this table's items. Used to display status filters.
+	 */
+	protected $status_counts = array();
+
+	/**
+	 * @var array Notices to display when loading the table. Array of arrays of form array( 'class' => {updated|error}, 'message' => 'This is the notice text display.' ).
+	 */
+	protected $admin_notices = array();
+
+	/**
+	 * @var string Localised string displayed in the <h1> element above the able.
+	 */
+	protected $table_header;
+
+	/**
+	 * Enables bulk actions. It must be an array where the key is the action name
+	 * and the value is the label (which is translated automatically). It is important
+	 * to notice that it will check that the method exists (`bulk_$name`) and will throw
+	 * an exception if it does not exists.
+	 *
+	 * This class will automatically check if the current request has a bulk action, will do the
+	 * validations and afterwards will execute the bulk method, with two arguments. The first argument
+	 * is the array with primary keys, the second argument is a string with a list of the primary keys,
+	 * escaped and ready to use (with `IN`).
+	 */
+	protected $bulk_actions = array();
+
+	/**
+	 * Makes translation easier, it basically just wraps
+	 * `_x` with some default (the package name)
+	 */
+	protected function translate( $text, $context = '' ) {
+		return _x( $text, $context, $this->package );
+	}
+
+	/**
+	 * Reads `$this->bulk_actions` and returns an array that WP_List_Table understands. It
+	 * also validates that the bulk method handler exists. It throws an exception because
+	 * this is a library meant for developers and missing a bulk method is a development-time error.
+	 */
+	protected function get_bulk_actions() {
+		$actions = array();
+
+		foreach ( $this->bulk_actions as $action => $label ) {
+			if ( ! is_callable( array( $this, 'bulk_' . $action ) ) ) {
+				throw new RuntimeException( "The bulk action $action does not have a callback method" );
+			}
+
+			$actions[ $action ] = $this->translate( $label );
+		}
+
+		return $actions;
+	}
+
+	/**
+	 * Checks if the current request has a bulk action. If that is the case it will validate and will
+	 * execute the bulk method handler. Regardless if the action is valid or not it will redirect to
+	 * the previous page removing the current arguments that makes this request a bulk action.
+	 */
+	protected function process_bulk_action() {
+		global $wpdb;
+		// Detect when a bulk action is being triggered.
+		$action = $this->current_action();
+
+		if ( ! $action ) {
+			return;
+		}
+
+		check_admin_referer( 'bulk-' . $this->_args['plural'] );
+
+		$method   = 'bulk_' . $action;
+		if ( array_key_exists( $action, $this->bulk_actions ) && is_callable( array( $this, $method ) ) && ! empty( $_GET['ID'] ) && is_array( $_GET['ID'] ) ) {
+			$ids_sql = '(' . implode( ',', array_fill( 0, count( $_GET['ID'] ), '%s' ) ) . ')';
+			$this->$method( $_GET['ID'], $wpdb->prepare( $ids_sql, $_GET['ID'] ) );
+		}
+
+		wp_redirect( remove_query_arg(
+			array( '_wp_http_referer', '_wpnonce', 'ID', 'action', 'action2' ),
+			wp_unslash( $_SERVER['REQUEST_URI'] )
+		) );
+		exit;
+	}
+
+	/**
+	 * Default code for deleting entries. We trust ids_sql because it is
+	 * validated already by process_bulk_action()
+	 */
+	protected function bulk_delete( array $ids, $ids_sql ) {
+		global $wpdb;
+
+		$wpdb->query( "DELETE FROM {$this->table_name} WHERE {$this->ID} IN $ids_sql" );
+	}
+
+	/**
+	 * Prepares the _column_headers property which is used by WP_Table_List at rendering.
+	 * It merges the columns and the sortable columns.
+	 */
+	protected function prepare_column_headers() {
+		$this->_column_headers = array(
+			$this->get_columns(),
+			array(),
+			$this->get_sortable_columns(),
+		);
+	}
+
+	/**
+	 * Reads $this->sort_by and returns the columns name in a format that WP_Table_List
+	 * expects
+	 */
+	public function get_sortable_columns() {
+		$sort_by = array();
+		foreach ( $this->sort_by as $column ) {
+			$sort_by[ $column ] = array( $column, true );
+		}
+		return $sort_by;
+	}
+
+	/**
+	 * Returns the columns names for rendering. It adds a checkbox for selecting everything
+	 * as the first column
+	 */
+	public function get_columns() {
+		$columns = array_merge(
+			array( 'cb' => '<input type="checkbox" />' ),
+			array_map( array( $this, 'translate' ), $this->columns )
+		);
+
+		return $columns;
+	}
+
+	/**
+	 * Get prepared LIMIT clause for items query
+	 *
+	 * @global wpdb $wpdb
+	 *
+	 * @return string Prepared LIMIT clause for items query.
+	 */
+	protected function get_items_query_limit() {
+		global $wpdb;
+
+		$per_page = $this->get_items_per_page( $this->package . '_items_per_page', $this->items_per_page );
+		return $wpdb->prepare( 'LIMIT %d', $per_page );
+	}
+
+	/**
+	 * Returns the number of items to offset/skip for this current view.
+	 *
+	 * @return int
+	 */
+	protected function get_items_offset() {
+		$per_page = $this->get_items_per_page( $this->package . '_items_per_page', $this->items_per_page );
+		$current_page = $this->get_pagenum();
+		if ( 1 < $current_page ) {
+			$offset = $per_page * ( $current_page - 1 );
+		} else {
+			$offset = 0;
+		}
+
+		return $offset;
+	}
+
+	/**
+	 * Get prepared OFFSET clause for items query
+	 *
+	 * @global wpdb $wpdb
+	 *
+	 * @return string Prepared OFFSET clause for items query.
+	 */
+	protected function get_items_query_offset() {
+		global $wpdb;
+
+		return $wpdb->prepare( 'OFFSET %d', $this->get_items_offset() );
+	}
+
+	/**
+	 * Prepares the ORDER BY sql statement. It uses `$this->sort_by` to know which
+	 * columns are sortable. This requests validates the orderby $_GET parameter is a valid
+	 * column and sortable. It will also use order (ASC|DESC) using DESC by default.
+	 */
+	protected function get_items_query_order() {
+		if ( empty( $this->sort_by ) ) {
+			return '';
+		}
+
+		$orderby = esc_sql( $this->get_request_orderby() );
+		$order   = esc_sql( $this->get_request_order() );
+
+		return "ORDER BY {$orderby} {$order}";
+	}
+
+	/**
+	 * Return the sortable column specified for this request to order the results by, if any.
+	 *
+	 * @return string
+	 */
+	protected function get_request_orderby() {
+
+		$valid_sortable_columns = array_values( $this->sort_by );
+
+		if ( ! empty( $_GET['orderby'] ) && in_array( $_GET['orderby'], $valid_sortable_columns ) ) {
+			$orderby = sanitize_text_field( $_GET['orderby'] );
+		} else {
+			$orderby = $valid_sortable_columns[0];
+		}
+
+		return $orderby;
+	}
+
+	/**
+	 * Return the sortable column order specified for this request.
+	 *
+	 * @return string
+	 */
+	protected function get_request_order() {
+
+		if ( ! empty( $_GET['order'] ) && 'desc' === strtolower( $_GET['order'] ) ) {
+			$order = 'DESC';
+		} else {
+			$order = 'ASC';
+		}
+
+		return $order;
+	}
+
+	/**
+	 * Return the status filter for this request, if any.
+	 *
+	 * @return string
+	 */
+	protected function get_request_status() {
+		$status = ( ! empty( $_GET['status'] ) ) ? $_GET['status'] : '';
+		return $status;
+	}
+
+	/**
+	 * Return the search filter for this request, if any.
+	 *
+	 * @return string
+	 */
+	protected function get_request_search_query() {
+		$search_query = ( ! empty( $_GET['s'] ) ) ? $_GET['s'] : '';
+		return $search_query;
+	}
+
+	/**
+	 * Process and return the columns name. This is meant for using with SQL, this means it
+	 * always includes the primary key.
+	 *
+	 * @return array
+	 */
+	protected function get_table_columns() {
+		$columns = array_keys( $this->columns );
+		if ( ! in_array( $this->ID, $columns ) ) {
+			$columns[] = $this->ID;
+		}
+
+		return $columns;
+	}
+
+	/**
+	 * Check if the current request is doing a "full text" search. If that is the case
+	 * prepares the SQL to search texts using LIKE.
+	 *
+	 * If the current request does not have any search or if this list table does not support
+	 * that feature it will return an empty string.
+	 *
+	 * TODO:
+	 *   - Improve search doing LIKE by word rather than by phrases.
+	 *
+	 * @return string
+	 */
+	protected function get_items_query_search() {
+		global $wpdb;
+
+		if ( empty( $_GET['s'] ) || empty( $this->search_by ) ) {
+			return '';
+		}
+
+		$filter  = array();
+		foreach ( $this->search_by as $column ) {
+			$filter[] = '`' . $column . '` like "%' . $wpdb->esc_like( $_GET['s'] ) . '%"';
+		}
+		return implode( ' OR ', $filter );
+	}
+
+	/**
+	 * Prepares the SQL to filter rows by the options defined at `$this->filter_by`. Before trusting
+	 * any data sent by the user it validates that it is a valid option.
+	 */
+	protected function get_items_query_filters() {
+		global $wpdb;
+
+		if ( ! $this->filter_by || empty( $_GET['filter_by'] ) || ! is_array( $_GET['filter_by'] ) ) {
+			return '';
+		}
+
+		$filter = array();
+
+		foreach ( $this->filter_by as $column => $options ) {
+			if ( empty( $_GET['filter_by'][ $column ] ) || empty( $options[ $_GET['filter_by'][ $column ] ] ) ) {
+				continue;
+			}
+
+			$filter[] = $wpdb->prepare( "`$column` = %s", $_GET['filter_by'][ $column ] );
+		}
+
+		return implode( ' AND ', $filter );
+
+	}
+
+	/**
+	 * Prepares the data to feed WP_Table_List.
+	 *
+	 * This has the core for selecting, sorting and filting data. To keep the code simple
+	 * its logic is split among many methods (get_items_query_*).
+	 *
+	 * Beside populating the items this function will also count all the records that matches
+	 * the filtering criteria and will do fill the pagination variables.
+	 */
+	public function prepare_items() {
+		global $wpdb;
+
+		$this->process_bulk_action();
+
+		$this->process_row_actions();
+
+		if ( ! empty( $_REQUEST['_wp_http_referer'] ) ) {
+			// _wp_http_referer is used only on bulk actions, we remove it to keep the $_GET shorter
+			wp_redirect( remove_query_arg( array( '_wp_http_referer', '_wpnonce' ), wp_unslash( $_SERVER['REQUEST_URI'] ) ) );
+			exit;
+		}
+
+		$this->prepare_column_headers();
+
+		$limit   = $this->get_items_query_limit();
+		$offset  = $this->get_items_query_offset();
+		$order   = $this->get_items_query_order();
+		$where   = array_filter(array(
+			$this->get_items_query_search(),
+			$this->get_items_query_filters(),
+		));
+		$columns = '`' . implode( '`, `', $this->get_table_columns() ) . '`';
+
+		if ( ! empty( $where ) ) {
+			$where = 'WHERE ('. implode( ') AND (', $where ) . ')';
+		} else {
+			$where = '';
+		}
+
+		$sql = "SELECT $columns FROM {$this->table_name} {$where} {$order} {$limit} {$offset}";
+
+		$this->set_items( $wpdb->get_results( $sql, ARRAY_A ) );
+
+		$query_count = "SELECT COUNT({$this->ID}) FROM {$this->table_name} {$where}";
+		$total_items = $wpdb->get_var( $query_count );
+		$per_page    = $this->get_items_per_page( $this->package . '_items_per_page', $this->items_per_page );
+		$this->set_pagination_args( array(
+			'total_items' => $total_items,
+			'per_page'    => $per_page,
+			'total_pages' => ceil( $total_items / $per_page ),
+		) );
+	}
+
+	public function extra_tablenav( $which ) {
+		if ( ! $this->filter_by || 'top' !== $which ) {
+			return;
+		}
+
+		echo '<div class="alignleft actions">';
+
+		foreach ( $this->filter_by as $id => $options ) {
+			$default = ! empty( $_GET['filter_by'][ $id ] ) ? $_GET['filter_by'][ $id ] : '';
+			if ( empty( $options[ $default ] ) ) {
+				$default = '';
+			}
+
+			echo '<select name="filter_by[' . esc_attr( $id ) . ']" class="first" id="filter-by-' . esc_attr( $id ) . '">';
+
+			foreach ( $options as $value => $label ) {
+				echo '<option value="' . esc_attr( $value ) . '" ' . esc_html( $value == $default ? 'selected' : '' )  .'>'
+					. esc_html( $this->translate( $label ) )
+				. '</option>';
+			}
+
+			echo '</select>';
+		}
+
+		submit_button( $this->translate( 'Filter' ), '', 'filter_action', false, array( 'id' => 'post-query-submit' ) );
+		echo '</div>';
+	}
+
+	/**
+	 * Set the data for displaying. It will attempt to unserialize (There is a chance that some columns
+	 * are serialized). This can be override in child classes for futher data transformation.
+	 */
+	protected function set_items( array $items ) {
+		$this->items = array();
+		foreach ( $items as $item ) {
+			$this->items[ $item[ $this->ID ] ] = array_map( 'maybe_unserialize', $item );
+		}
+	}
+
+	/**
+	 * Renders the checkbox for each row, this is the first column and it is named ID regardless
+	 * of how the primary key is named (to keep the code simpler). The bulk actions will do the proper
+	 * name transformation though using `$this->ID`.
+	 */
+	public function column_cb( $row ) {
+		return '<input name="ID[]" type="checkbox" value="' . esc_attr( $row[ $this->ID ] ) .'" />';
+	}
+
+	/**
+	 * Renders the row-actions.
+	 *
+	 * This method renders the action menu, it reads the definition from the $row_actions property,
+	 * and it checks that the row action method exists before rendering it.
+	 *
+	 * @param array $row     Row to render
+	 * @param $column_name   Current row
+	 * @return
+	 */
+	protected function maybe_render_actions( $row, $column_name ) {
+		if ( empty( $this->row_actions[ $column_name ] ) ) {
+			return;
+		}
+
+		$row_id = $row[ $this->ID ];
+
+		$actions = '<div class="row-actions">';
+		$action_count = 0;
+		foreach ( $this->row_actions[ $column_name ] as $action_key => $action ) {
+
+			$action_count++;
+
+			if ( ! method_exists( $this, 'row_action_' . $action_key ) ) {
+				continue;
+			}
+
+			$action_link = ! empty( $action['link'] ) ? $action['link'] : add_query_arg( array( 'row_action' => $action_key, 'row_id' => $row_id, 'nonce'  => wp_create_nonce( $action_key . '::' . $row_id ) ) );
+			$span_class  = ! empty( $action['class'] ) ? $action['class'] : $action_key;
+			$separator   = ( $action_count < count( $this->row_actions[ $column_name ] ) ) ? ' | ' : '';
+
+			$actions .= sprintf( '<span class="%s">', esc_attr( $span_class ) );
+			$actions .= sprintf( '<a href="%1$s" title="%2$s">%3$s</a>', esc_url( $action_link ), esc_attr( $action['desc'] ), esc_html( $action['name'] ) );
+			$actions .= sprintf( '%s</span>', $separator );
+		}
+		$actions .= '</div>';
+		return $actions;
+	}
+
+	protected function process_row_actions() {
+		$parameters = array( 'row_action', 'row_id', 'nonce' );
+		foreach ( $parameters as $parameter ) {
+			if ( empty( $_REQUEST[ $parameter ] ) ) {
+				return;
+			}
+		}
+
+		$method = 'row_action_' . $_REQUEST['row_action'];
+
+		if ( $_REQUEST['nonce'] === wp_create_nonce( $_REQUEST[ 'row_action' ] . '::' . $_REQUEST[ 'row_id' ] ) && method_exists( $this, $method ) ) {
+			$this->$method( $_REQUEST['row_id'] );
+		}
+
+		wp_redirect( remove_query_arg(
+			array( 'row_id', 'row_action', 'nonce' ),
+			wp_unslash( $_SERVER['REQUEST_URI'] )
+		) );
+		exit;
+	}
+
+	/**
+	 * Default column formatting, it will escape everythig for security.
+	 */
+	public function column_default( $item, $column_name ) {
+		$column_html = esc_html( $item[ $column_name ] );
+		$column_html .= $this->maybe_render_actions( $item, $column_name );
+		return $column_html;
+	}
+
+	/**
+	 * Display the table heading and search query, if any
+	 */
+	protected function display_header() {
+		echo '<h1 class="wp-heading-inline">' . esc_attr( $this->table_header ) . '</h1>';
+		if ( $this->get_request_search_query() ) {
+			echo '<span class="subtitle">' . esc_attr( $this->translate( sprintf( 'Search results for "%s"', $this->get_request_search_query() ) ) ) . '</span>';
+		}
+		echo '<hr class="wp-header-end">';
+	}
+
+	/**
+	 * Display the table heading and search query, if any
+	 */
+	protected function display_admin_notices() {
+		foreach ( $this->admin_notices as $notice ) {
+			echo '<div id="message" class="' . $notice['class'] . '">';
+			echo '	<p>' . wp_kses_post( $notice['message'] ) . '</p>';
+			echo '</div>';
+		}
+	}
+
+	/**
+	 * Prints the available statuses so the user can click to filter.
+	 */
+	protected function display_filter_by_status() {
+
+		$status_list_items = array();
+		$request_status    = $this->get_request_status();
+
+		// Helper to set 'all' filter when not set on status counts passed in
+		if ( ! isset( $this->status_counts['all'] ) ) {
+			$this->status_counts = array( 'all' => array_sum( $this->status_counts ) ) + $this->status_counts;
+		}
+
+		foreach ( $this->status_counts as $status_name => $count ) {
+
+			if ( 0 === $count ) {
+				continue;
+			}
+
+			if ( $status_name === $request_status || ( empty( $request_status ) && 'all' === $status_name ) ) {
+				$status_list_item = '<li class="%1$s"><strong>%3$s</strong> (%4$d)</li>';
+			} else {
+				$status_list_item = '<li class="%1$s"><a href="%2$s">%3$s</a> (%4$d)</li>';
+			}
+
+			$status_filter_url   = ( 'all' === $status_name ) ? remove_query_arg( 'status' ) : add_query_arg( 'status', $status_name );
+			$status_list_items[] = sprintf( $status_list_item, esc_attr( $status_name ), esc_url( $status_filter_url ), esc_html( ucfirst( $status_name ) ), absint( $count ) );
+		}
+
+		if ( $status_list_items ) {
+			echo '<ul class="subsubsub">';
+			echo implode( " | \n", $status_list_items );
+			echo '</ul>';
+		}
+	}
+
+	/**
+	 * Renders the table list, we override the original class to render the table inside a form
+	 * and to render any needed HTML (like the search box). By doing so the callee of a function can simple
+	 * forget about any extra HTML.
+	 */
+	protected function display_table() {
+		echo '<form id="' . esc_attr( $this->_args['plural'] ) . '-filter" method="get">';
+		foreach ( $_GET as $key => $value ) {
+			if ( '_' === $key[0] || 'paged' === $key ) {
+				continue;
+			}
+			echo '<input type="hidden" name="' . esc_attr( $key ) . '" value="' . esc_attr( $value ) . '" />';
+		}
+		if ( ! empty( $this->search_by ) ) {
+			echo $this->search_box( $this->get_search_box_button_text(), 'plugin' ); // WPCS: XSS OK
+		}
+		parent::display();
+		echo '</form>';
+	}
+
+	/**
+	 * Render the list table page, including header, notices, status filters and table.
+	 */
+	public function display_page() {
+		$this->prepare_items();
+
+		echo '<div class="wrap">';
+		$this->display_header();
+		$this->display_admin_notices();
+		$this->display_filter_by_status();
+		$this->display_table();
+		echo '</div>';
+	}
+
+	/**
+	 * Get the text to display in the search box on the list table.
+	 */
+	protected function get_search_box_placeholder() {
+		return $this->translate( 'Search' );
+	}
+}

classes/ActionScheduler_Abstract_QueueRunner.php

@@ -0,0 +1,219 @@
+<?php
+
+/**
+ * Abstract class with common Queue Cleaner functionality.
+ */
+abstract class ActionScheduler_Abstract_QueueRunner extends ActionScheduler_Abstract_QueueRunner_Deprecated {
+
+	/** @var ActionScheduler_QueueCleaner */
+	protected $cleaner;
+
+	/** @var ActionScheduler_FatalErrorMonitor */
+	protected $monitor;
+
+	/** @var ActionScheduler_Store */
+	protected $store;
+
+	/**
+	 * The created time.
+	 *
+	 * Represents when the queue runner was constructed and used when calculating how long a PHP request has been running.
+	 * For this reason it should be as close as possible to the PHP request start time.
+	 *
+	 * @var int
+	 */
+	private $created_time;
+
+	/**
+	 * ActionScheduler_Abstract_QueueRunner constructor.
+	 *
+	 * @param ActionScheduler_Store             $store
+	 * @param ActionScheduler_FatalErrorMonitor $monitor
+	 * @param ActionScheduler_QueueCleaner      $cleaner
+	 */
+	public function __construct( ActionScheduler_Store $store = null, ActionScheduler_FatalErrorMonitor $monitor = null, ActionScheduler_QueueCleaner $cleaner = null ) {
+
+		$this->created_time = microtime( true );
+
+		$this->store   = $store ? $store : ActionScheduler_Store::instance();
+		$this->monitor = $monitor ? $monitor : new ActionScheduler_FatalErrorMonitor( $this->store );
+		$this->cleaner = $cleaner ? $cleaner : new ActionScheduler_QueueCleaner( $this->store );
+	}
+
+	/**
+	 * Process an individual action.
+	 *
+	 * @param int $action_id The action ID to process.
+	 */
+	public function process_action( $action_id ) {
+		try {
+			do_action( 'action_scheduler_before_execute', $action_id );
+
+			if ( ActionScheduler_Store::STATUS_PENDING !== $this->store->get_status( $action_id ) ) {
+				do_action( 'action_scheduler_execution_ignored', $action_id );
+				return;
+			}
+
+			$action = $this->store->fetch_action( $action_id );
+			$this->store->log_execution( $action_id );
+			$action->execute();
+			do_action( 'action_scheduler_after_execute', $action_id, $action );
+			$this->store->mark_complete( $action_id );
+		} catch ( Exception $e ) {
+			$this->store->mark_failure( $action_id );
+			do_action( 'action_scheduler_failed_execution', $action_id, $e );
+		}
+
+		if ( isset( $action ) && is_a( $action, 'ActionScheduler_Action' ) ) {
+			$this->schedule_next_instance( $action );
+		}
+	}
+
+	/**
+	 * Schedule the next instance of the action if necessary.
+	 *
+	 * @param ActionScheduler_Action $action
+	 */
+	protected function schedule_next_instance( ActionScheduler_Action $action ) {
+		$schedule = $action->get_schedule();
+		$next     = $schedule->next( as_get_datetime_object() );
+
+		if ( ! is_null( $next ) && $schedule->is_recurring() ) {
+			$this->store->save_action( $action, $next );
+		}
+	}
+
+	/**
+	 * Run the queue cleaner.
+	 *
+	 * @author Jeremy Pry
+	 */
+	protected function run_cleanup() {
+		$this->cleaner->clean( 10 * $this->get_time_limit() );
+	}
+
+	/**
+	 * Get the number of concurrent batches a runner allows.
+	 *
+	 * @return int
+	 */
+	public function get_allowed_concurrent_batches() {
+		return apply_filters( 'action_scheduler_queue_runner_concurrent_batches', 5 );
+	}
+
+	/**
+	 * Get the maximum number of seconds a batch can run for.
+	 *
+	 * @return int The number of seconds.
+	 */
+	protected function get_time_limit() {
+
+		$time_limit = 30;
+
+		// Apply deprecated filter from deprecated get_maximum_execution_time() method
+		if ( has_filter( 'action_scheduler_maximum_execution_time' ) ) {
+			_deprecated_function( 'action_scheduler_maximum_execution_time', '2.1.1', 'action_scheduler_queue_runner_time_limit' );
+			$time_limit = apply_filters( 'action_scheduler_maximum_execution_time', $time_limit );
+		}
+
+		return absint( apply_filters( 'action_scheduler_queue_runner_time_limit', $time_limit ) );
+	}
+
+	/**
+	 * Get the number of seconds the process has been running.
+	 *
+	 * @return int The number of seconds.
+	 */
+	protected function get_execution_time() {
+		$execution_time = microtime( true ) - $this->created_time;
+
+		// Get the CPU time if the hosting environment uses it rather than wall-clock time to calculate a process's execution time.
+		if ( function_exists( 'getrusage' ) && apply_filters( 'action_scheduler_use_cpu_execution_time', defined( 'PANTHEON_ENVIRONMENT' ) ) ) {
+			$resource_usages = getrusage();
+
+			if ( isset( $resource_usages['ru_stime.tv_usec'], $resource_usages['ru_stime.tv_usec'] ) ) {
+				$execution_time = $resource_usages['ru_stime.tv_sec'] + ( $resource_usages['ru_stime.tv_usec'] / 1000000 );
+			}
+		}
+
+		return $execution_time;
+	}
+
+	/**
+	 * Check if the host's max execution time is (likely) to be exceeded if processing more actions.
+	 *
+	 * @param int $processed_actions The number of actions processed so far - used to determine the likelihood of exceeding the time limit if processing another action
+	 * @return bool
+	 */
+	protected function time_likely_to_be_exceeded( $processed_actions ) {
+
+		$execution_time        = $this->get_execution_time();
+		$max_execution_time    = $this->get_time_limit();
+		$time_per_action       = $execution_time / $processed_actions;
+		$estimated_time        = $execution_time + ( $time_per_action * 3 );
+		$likely_to_be_exceeded = $estimated_time > $max_execution_time;
+
+		return apply_filters( 'action_scheduler_maximum_execution_time_likely_to_be_exceeded', $likely_to_be_exceeded, $this, $processed_actions, $execution_time, $max_execution_time );
+	}
+
+	/**
+	 * Get memory limit
+	 *
+	 * Based on WP_Background_Process::get_memory_limit()
+	 *
+	 * @return int
+	 */
+	protected function get_memory_limit() {
+		if ( function_exists( 'ini_get' ) ) {
+			$memory_limit = ini_get( 'memory_limit' );
+		} else {
+			$memory_limit = '128M'; // Sensible default, and minimum required by WooCommerce
+		}
+
+		if ( ! $memory_limit || -1 === $memory_limit || '-1' === $memory_limit ) {
+			// Unlimited, set to 32GB.
+			$memory_limit = '32G';
+		}
+
+		return ActionScheduler_Compatibility::convert_hr_to_bytes( $memory_limit );
+	}
+
+	/**
+	 * Memory exceeded
+	 *
+	 * Ensures the batch process never exceeds 90% of the maximum WordPress memory.
+	 *
+	 * Based on WP_Background_Process::memory_exceeded()
+	 *
+	 * @return bool
+	 */
+	protected function memory_exceeded() {
+
+		$memory_limit    = $this->get_memory_limit() * 0.90;
+		$current_memory  = memory_get_usage( true );
+		$memory_exceeded = $current_memory >= $memory_limit;
+
+		return apply_filters( 'action_scheduler_memory_exceeded', $memory_exceeded, $this );
+	}
+
+	/**
+	 * See if the batch limits have been exceeded, which is when memory usage is almost at
+	 * the maximum limit, or the time to process more actions will exceed the max time limit.
+	 *
+	 * Based on WC_Background_Process::batch_limits_exceeded()
+	 *
+	 * @param int $processed_actions The number of actions processed so far - used to determine the likelihood of exceeding the time limit if processing another action
+	 * @return bool
+	 */
+	protected function batch_limits_exceeded( $processed_actions ) {
+		return $this->memory_exceeded() || $this->time_likely_to_be_exceeded( $processed_actions );
+	}
+
+	/**
+	 * Process actions in the queue.
+	 *
+	 * @author Jeremy Pry
+	 * @return int The number of actions processed.
+	 */
+	abstract public function run();
+}

classes/ActionScheduler_Action.php

@@ -0,0 +1,75 @@
+<?php
+
+/**
+ * Class ActionScheduler_Action
+ */
+class ActionScheduler_Action {
+	protected $hook = '';
+	protected $args = array();
+	/** @var ActionScheduler_Schedule */
+	protected $schedule = NULL;
+	protected $group = '';
+
+	public function __construct( $hook, array $args = array(), ActionScheduler_Schedule $schedule = NULL, $group = '' ) {
+		$schedule = empty( $schedule ) ? new ActionScheduler_NullSchedule() : $schedule;
+		$this->set_hook($hook);
+		$this->set_schedule($schedule);
+		$this->set_args($args);
+		$this->set_group($group);
+	}
+
+	public function execute() {
+		return do_action_ref_array($this->get_hook(), $this->get_args());
+	}
+
+	/**
+	 * @param string $hook
+	 */
+	protected function set_hook( $hook ) {
+		$this->hook = $hook;
+	}
+
+	public function get_hook() {
+		return $this->hook;
+	}
+
+	protected function set_schedule( ActionScheduler_Schedule $schedule ) {
+		$this->schedule = $schedule;
+	}
+
+	/**
+	 * @return ActionScheduler_Schedule
+	 */
+	public function get_schedule() {
+		return $this->schedule;
+	}
+
+	protected function set_args( array $args ) {
+		$this->args = $args;
+	}
+
+	public function get_args() {
+		return $this->args;
+	}
+
+	/**
+	 * @param string $group
+	 */
+	protected function set_group( $group ) {
+		$this->group = $group;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function get_group() {
+		return $this->group;
+	}
+
+	/**
+	 * @return bool If the action has been finished
+	 */
+	public function is_finished() {
+		return FALSE;
+	}
+}

classes/ActionScheduler_ActionClaim.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * Class ActionScheduler_ActionClaim
+ */
+class ActionScheduler_ActionClaim {
+	private $id = '';
+	private $action_ids = array();
+
+	public function __construct( $id, array $action_ids ) {
+		$this->id = $id;
+		$this->action_ids = $action_ids;
+	}
+
+	public function get_id() {
+		return $this->id;
+	}
+
+	public function get_actions() {
+		return $this->action_ids;
+	}
+}
+ 

classes/ActionScheduler_ActionFactory.php

@@ -0,0 +1,111 @@
+<?php
+
+/**
+ * Class ActionScheduler_ActionFactory
+ */
+class ActionScheduler_ActionFactory {
+
+	/**
+	 * @param string $status The action's status in the data store
+	 * @param string $hook The hook to trigger when this action runs
+	 * @param array $args Args to pass to callbacks when the hook is triggered
+	 * @param ActionScheduler_Schedule $schedule The action's schedule
+	 * @param string $group A group to put the action in
+	 *
+	 * @return ActionScheduler_Action An instance of the stored action
+	 */
+	public function get_stored_action( $status, $hook, array $args = array(), ActionScheduler_Schedule $schedule = null, $group = '' ) {
+
+		switch ( $status ) {
+			case ActionScheduler_Store::STATUS_PENDING :
+				$action_class = 'ActionScheduler_Action';
+				break;
+			case ActionScheduler_Store::STATUS_CANCELED :
+				$action_class = 'ActionScheduler_CanceledAction';
+				break;
+			default :
+				$action_class = 'ActionScheduler_FinishedAction';
+				break;
+		}
+
+		$action_class = apply_filters( 'action_scheduler_stored_action_class', $action_class, $status, $hook, $args, $schedule, $group );
+
+		$action = new $action_class( $hook, $args, $schedule, $group );
+
+		/**
+		 * Allow 3rd party code to change the instantiated action for a given hook, args, schedule and group.
+		 *
+		 * @param ActionScheduler_Action $action The instantiated action.
+		 * @param string $hook The instantiated action's hook.
+		 * @param array $args The instantiated action's args.
+		 * @param ActionScheduler_Schedule $schedule The instantiated action's schedule.
+		 * @param string $group The instantiated action's group.
+		 */
+		return apply_filters( 'action_scheduler_stored_action_instance', $action, $hook, $args, $schedule, $group );
+	}
+
+	/**
+	 * @param string $hook The hook to trigger when this action runs
+	 * @param array $args Args to pass when the hook is triggered
+	 * @param int $when Unix timestamp when the action will run
+	 * @param string $group A group to put the action in
+	 *
+	 * @return string The ID of the stored action
+	 */
+	public function single( $hook, $args = array(), $when = null, $group = '' ) {
+		$date = as_get_datetime_object( $when );
+		$schedule = new ActionScheduler_SimpleSchedule( $date );
+		$action = new ActionScheduler_Action( $hook, $args, $schedule, $group );
+		return $this->store( $action );
+	}
+
+	/**
+	 * @param string $hook The hook to trigger when this action runs
+	 * @param array $args Args to pass when the hook is triggered
+	 * @param int $first Unix timestamp for the first run
+	 * @param int $interval Seconds between runs
+	 * @param string $group A group to put the action in
+	 *
+	 * @return string The ID of the stored action
+	 */
+	public function recurring( $hook, $args = array(), $first = null, $interval = null, $group = '' ) {
+		if ( empty($interval) ) {
+			return $this->single( $hook, $args, $first, $group );
+		}
+		$date = as_get_datetime_object( $first );
+		$schedule = new ActionScheduler_IntervalSchedule( $date, $interval );
+		$action = new ActionScheduler_Action( $hook, $args, $schedule, $group );
+		return $this->store( $action );
+	}
+
+
+	/**
+	 * @param string $hook The hook to trigger when this action runs
+	 * @param array $args Args to pass when the hook is triggered
+	 * @param int $first Unix timestamp for the first run
+	 * @param int $schedule A cron definition string
+	 * @param string $group A group to put the action in
+	 *
+	 * @return string The ID of the stored action
+	 */
+	public function cron( $hook, $args = array(), $first = null, $schedule = null, $group = '' ) {
+		if ( empty($schedule) ) {
+			return $this->single( $hook, $args, $first, $group );
+		}
+		$date = as_get_datetime_object( $first );
+		$cron = CronExpression::factory( $schedule );
+		$schedule = new ActionScheduler_CronSchedule( $date, $cron );
+		$action = new ActionScheduler_Action( $hook, $args, $schedule, $group );
+		return $this->store( $action );
+	}
+
+	/**
+	 * @param ActionScheduler_Action $action
+	 *
+	 * @return string The ID of the stored action
+	 */
+	protected function store( ActionScheduler_Action $action ) {
+		$store = ActionScheduler_Store::instance();
+		return $store->save_action( $action );
+	}
+}

classes/ActionScheduler_AdminView.php

@@ -0,0 +1,83 @@
+<?php
+
+/**
+ * Class ActionScheduler_AdminView
+ * @codeCoverageIgnore
+ */
+class ActionScheduler_AdminView extends ActionScheduler_AdminView_Deprecated {
+
+	private static $admin_view = NULL;
+
+	/**
+	 * @return ActionScheduler_QueueRunner
+	 * @codeCoverageIgnore
+	 */
+	public static function instance() {
+
+		if ( empty( self::$admin_view ) ) {
+			$class = apply_filters('action_scheduler_admin_view_class', 'ActionScheduler_AdminView');
+			self::$admin_view = new $class();
+		}
+
+		return self::$admin_view;
+	}
+
+	/**
+	 * @codeCoverageIgnore
+	 */
+	public function init() {
+		if ( is_admin() && ( ! defined( 'DOING_AJAX' ) || false == DOING_AJAX ) ) {
+
+			if ( class_exists( 'WooCommerce' ) ) {
+				add_action( 'woocommerce_admin_status_content_action-scheduler', array( $this, 'render_admin_ui' ) );
+				add_action( 'woocommerce_system_status_report', array( $this, 'system_status_report' ) );
+				add_filter( 'woocommerce_admin_status_tabs', array( $this, 'register_system_status_tab' ) );
+			}
+
+			add_action( 'admin_menu', array( $this, 'register_menu' ) );
+		}
+	}
+
+	public function system_status_report() {
+		$table = new ActionScheduler_wcSystemStatus( ActionScheduler::store() );
+		$table->print();
+	}
+
+	/**
+	 * Registers action-scheduler into WooCommerce > System status.
+	 *
+	 * @param array $tabs An associative array of tab key => label.
+	 * @return array $tabs An associative array of tab key => label, including Action Scheduler's tabs
+	 */
+	public function register_system_status_tab( array $tabs ) {
+		$tabs['action-scheduler'] = __( 'Scheduled Actions', 'action-scheduler' );
+
+		return $tabs;
+	}
+
+	/**
+	 * Include Action Scheduler's administration under the Tools menu.
+	 *
+	 * A menu under the Tools menu is important for backward compatibility (as that's
+	 * where it started), and also provides more convenient access than the WooCommerce
+	 * System Status page, and for sites where WooCommerce isn't active.
+	 */
+	public function register_menu() {
+		add_submenu_page(
+			'tools.php',
+			__( 'Scheduled Actions', 'action-scheduler' ),
+			__( 'Scheduled Actions', 'action-scheduler' ),
+			'manage_options',
+			'action-scheduler',
+			array( $this, 'render_admin_ui' )
+		);
+	}
+
+	/**
+	 * Renders the Admin UI
+	 */
+	public function render_admin_ui() {
+		$table = new ActionScheduler_ListTable( ActionScheduler::store(), ActionScheduler::logger(), ActionScheduler::runner() );
+		$table->display_page();
+	}
+}

classes/ActionScheduler_CanceledAction.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * Class ActionScheduler_CanceledAction
+ *
+ * Stored action which was canceled and therefore acts like a finished action but should always return a null schedule,
+ * regardless of schedule passed to its constructor.
+ */
+class ActionScheduler_CanceledAction extends ActionScheduler_FinishedAction {
+
+	/**
+	 * @param string $hook
+	 * @param array $args
+	 * @param ActionScheduler_Schedule $schedule
+	 * @param string $group
+	 */
+	public function __construct( $hook, array $args = array(), ActionScheduler_Schedule $schedule = null, $group = '' ) {
+		parent::__construct( $hook, $args, $schedule, $group );
+		$this->set_schedule( new ActionScheduler_NullSchedule() );
+	}
+}

classes/ActionScheduler_Compatibility.php

@@ -0,0 +1,99 @@
+<?php
+
+/**
+ * Class ActionScheduler_Compatibility
+ */
+class ActionScheduler_Compatibility {
+
+	/**
+	 * Converts a shorthand byte value to an integer byte value.
+	 *
+	 * Wrapper for wp_convert_hr_to_bytes(), moved to load.php in WordPress 4.6 from media.php
+	 *
+	 * @link https://secure.php.net/manual/en/function.ini-get.php
+	 * @link https://secure.php.net/manual/en/faq.using.php#faq.using.shorthandbytes
+	 *
+	 * @param string $value A (PHP ini) byte value, either shorthand or ordinary.
+	 * @return int An integer byte value.
+	 */
+	public static function convert_hr_to_bytes( $value ) {
+		if ( function_exists( 'wp_convert_hr_to_bytes' ) ) {
+			return wp_convert_hr_to_bytes( $value );
+		}
+
+		$value = strtolower( trim( $value ) );
+		$bytes = (int) $value;
+
+		if ( false !== strpos( $value, 'g' ) ) {
+			$bytes *= GB_IN_BYTES;
+		} elseif ( false !== strpos( $value, 'm' ) ) {
+			$bytes *= MB_IN_BYTES;
+		} elseif ( false !== strpos( $value, 'k' ) ) {
+			$bytes *= KB_IN_BYTES;
+		}
+
+		// Deal with large (float) values which run into the maximum integer size.
+		return min( $bytes, PHP_INT_MAX );
+	}
+
+	/**
+	 * Attempts to raise the PHP memory limit for memory intensive processes.
+	 *
+	 * Only allows raising the existing limit and prevents lowering it.
+	 *
+	 * Wrapper for wp_raise_memory_limit(), added in WordPress v4.6.0
+	 *
+	 * @return bool|int|string The limit that was set or false on failure.
+	 */
+	public static function raise_memory_limit() {
+		if ( function_exists( 'wp_raise_memory_limit' ) ) {
+			return wp_raise_memory_limit( 'admin' );
+		}
+
+		$current_limit     = @ini_get( 'memory_limit' );
+		$current_limit_int = self::convert_hr_to_bytes( $current_limit );
+
+		if ( -1 === $current_limit_int ) {
+			return false;
+		}
+
+		$wp_max_limit       = WP_MAX_MEMORY_LIMIT;
+		$wp_max_limit_int   = self::convert_hr_to_bytes( $wp_max_limit );
+		$filtered_limit     = apply_filters( 'admin_memory_limit', $wp_max_limit );
+		$filtered_limit_int = self::convert_hr_to_bytes( $filtered_limit );
+
+		if ( -1 === $filtered_limit_int || ( $filtered_limit_int > $wp_max_limit_int && $filtered_limit_int > $current_limit_int ) ) {
+			if ( false !== @ini_set( 'memory_limit', $filtered_limit ) ) {
+				return $filtered_limit;
+			} else {
+				return false;
+			}
+		} elseif ( -1 === $wp_max_limit_int || $wp_max_limit_int > $current_limit_int ) {
+			if ( false !== @ini_set( 'memory_limit', $wp_max_limit ) ) {
+				return $wp_max_limit;
+			} else {
+				return false;
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * Attempts to raise the PHP timeout for time intensive processes.
+	 *
+	 * Only allows raising the existing limit and prevents lowering it. Wrapper for wc_set_time_limit(), when available.
+	 *
+	 * @param int The time limit in seconds.
+	 */
+	public static function raise_time_limit( $limit = 0 ) {
+		if ( $limit < ini_get( 'max_execution_time' ) ) {
+			return;
+		}
+
+		if ( function_exists( 'wc_set_time_limit' ) ) {
+			wc_set_time_limit( $limit );
+		} elseif ( function_exists( 'set_time_limit' ) && false === strpos( ini_get( 'disable_functions' ), 'set_time_limit' ) && ! ini_get( 'safe_mode' ) ) {
+			@set_time_limit( $limit );
+		}
+	}
+}

classes/ActionScheduler_CronSchedule.php

@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * Class ActionScheduler_CronSchedule
+ */
+class ActionScheduler_CronSchedule implements ActionScheduler_Schedule {
+	/** @var DateTime */
+	private $start = NULL;
+	private $start_timestamp = 0;
+	/** @var CronExpression */
+	private $cron = NULL;
+
+	public function __construct( DateTime $start, CronExpression $cron ) {
+		$this->start = $start;
+		$this->cron = $cron;
+	}
+
+	/**
+	 * @param DateTime $after
+	 * @return DateTime|null
+	 */
+	public function next( DateTime $after = NULL ) {
+		$after = empty($after) ? clone $this->start : clone $after;
+		return $this->cron->getNextRunDate($after, 0, false);
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function is_recurring() {
+		return true;
+	}
+
+	/**
+	 * @return string
+	 */
+	public function get_recurrence() {
+		return strval($this->cron);
+	}
+
+	/**
+	 * For PHP 5.2 compat, since DateTime objects can't be serialized
+	 * @return array
+	 */
+	public function __sleep() {
+		$this->start_timestamp = $this->start->getTimestamp();
+		return array(
+			'start_timestamp',
+			'cron'
+		);
+	}
+
+	public function __wakeup() {
+		$this->start = as_get_datetime_object($this->start_timestamp);
+	}
+}
+

classes/ActionScheduler_DateTime.php

@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * ActionScheduler DateTime class.
+ *
+ * This is a custom extension to DateTime that
+ */
+class ActionScheduler_DateTime extends DateTime {
+
+	/**
+	 * UTC offset.
+	 *
+	 * Only used when a timezone is not set. When a timezone string is
+	 * used, this will be set to 0.
+	 *
+	 * @var int
+	 */
+	protected $utcOffset = 0;
+
+	/**
+	 * Get the unix timestamp of the current object.
+	 *
+	 * Missing in PHP 5.2 so just here so it can be supported consistently.
+	 *
+	 * @return int
+	 */
+	public function getTimestamp() {
+		return method_exists( 'DateTime', 'getTimestamp' ) ? parent::getTimestamp() : $this->format( 'U' );
+	}
+
+	/**
+	 * Set the UTC offset.
+	 *
+	 * This represents a fixed offset instead of a timezone setting.
+	 *
+	 * @param $offset
+	 */
+	public function setUtcOffset( $offset ) {
+		$this->utcOffset = intval( $offset );
+	}
+
+	/**
+	 * Returns the timezone offset.
+	 *
+	 * @return int
+	 * @link http://php.net/manual/en/datetime.getoffset.php
+	 */
+	public function getOffset() {
+		return $this->utcOffset ? $this->utcOffset : parent::getOffset();
+	}
+
+	/**
+	 * Set the TimeZone associated with the DateTime
+	 *
+	 * @param DateTimeZone $timezone
+	 *
+	 * @return static
+	 * @link http://php.net/manual/en/datetime.settimezone.php
+	 */
+	public function setTimezone( $timezone ) {
+		$this->utcOffset = 0;
+		parent::setTimezone( $timezone );
+
+		return $this;
+	}
+
+	/**
+	 * Get the timestamp with the WordPress timezone offset added or subtracted.
+	 *
+	 * @since  3.0.0
+	 * @return int
+	 */
+	public function getOffsetTimestamp() {
+		return $this->getTimestamp() + $this->getOffset();
+	}
+}

classes/ActionScheduler_Exception.php

@@ -0,0 +1,11 @@
+<?php
+
+/**
+ * ActionScheduler Exception Interface.
+ *
+ * Facilitates catching Exceptions unique to Action Scheduler.
+ *
+ * @package Prospress\ActionScheduler
+ * @since %VERSION%
+ */
+interface ActionScheduler_Exception {}

classes/ActionScheduler_FatalErrorMonitor.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * Class ActionScheduler_FatalErrorMonitor
+ */
+class ActionScheduler_FatalErrorMonitor {
+	/** @var ActionScheduler_ActionClaim */
+	private $claim = NULL;
+	/** @var ActionScheduler_Store */
+	private $store = NULL;
+	private $action_id = 0;
+
+	public function __construct( ActionScheduler_Store $store ) {
+		$this->store = $store;
+	}
+
+	public function attach( ActionScheduler_ActionClaim $claim ) {
+		$this->claim = $claim;
+		add_action( 'shutdown', array( $this, 'handle_unexpected_shutdown' ) );
+		add_action( 'action_scheduler_before_execute', array( $this, 'track_current_action' ), 0, 1 );
+		add_action( 'action_scheduler_after_execute',  array( $this, 'untrack_action' ), 0, 0 );
+		add_action( 'action_scheduler_execution_ignored',  array( $this, 'untrack_action' ), 0, 0 );
+		add_action( 'action_scheduler_failed_execution',  array( $this, 'untrack_action' ), 0, 0 );
+	}
+
+	public function detach() {
+		$this->claim = NULL;
+		$this->untrack_action();
+		remove_action( 'shutdown', array( $this, 'handle_unexpected_shutdown' ) );
+		remove_action( 'action_scheduler_before_execute', array( $this, 'track_current_action' ), 0 );
+		remove_action( 'action_scheduler_after_execute',  array( $this, 'untrack_action' ), 0 );
+		remove_action( 'action_scheduler_execution_ignored',  array( $this, 'untrack_action' ), 0 );
+		remove_action( 'action_scheduler_failed_execution',  array( $this, 'untrack_action' ), 0 );
+	}
+
+	public function track_current_action( $action_id ) {
+		$this->action_id = $action_id;
+	}
+
+	public function untrack_action() {
+		$this->action_id = 0;
+	}
+
+	public function handle_unexpected_shutdown() {
+		if ( $error = error_get_last() ) {
+			if ( in_array( $error['type'], array( E_ERROR, E_PARSE, E_COMPILE_ERROR, E_USER_ERROR, E_RECOVERABLE_ERROR ) ) ) {
+				if ( !empty($this->action_id) ) {
+					$this->store->mark_failure( $this->action_id );
+					do_action( 'action_scheduler_unexpected_shutdown', $this->action_id, $error );
+				}
+			}
+			$this->store->release_claim( $this->claim );
+		}
+	}
+}

classes/ActionScheduler_FinishedAction.php

@@ -0,0 +1,16 @@
+<?php
+
+/**
+ * Class ActionScheduler_FinishedAction
+ */
+class ActionScheduler_FinishedAction extends ActionScheduler_Action {
+
+	public function execute() {
+		// don't execute
+	}
+
+	public function is_finished() {
+		return TRUE;
+	}
+}
+ 

classes/ActionScheduler_IntervalSchedule.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * Class ActionScheduler_IntervalSchedule
+ */
+class ActionScheduler_IntervalSchedule implements ActionScheduler_Schedule {
+	/** @var DateTime */
+	private $start = NULL;
+	private $start_timestamp = 0;
+	private $interval_in_seconds = 0;
+
+	public function __construct( DateTime $start, $interval ) {
+		$this->start = $start;
+		$this->interval_in_seconds = (int)$interval;
+	}
+
+	/**
+	 * @param DateTime $after
+	 *
+	 * @return DateTime|null
+	 */
+	public function next( DateTime $after = NULL ) {
+		$after = empty($after) ? as_get_datetime_object('@0') : clone $after;
+		if ( $after > $this->start ) {
+			$after->modify('+'.$this->interval_in_seconds.' seconds');
+			return $after;
+		}
+		return clone $this->start;
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function is_recurring() {
+		return true;
+	}
+
+	/**
+	 * @return int
+	 */
+	public function interval_in_seconds() {
+		return $this->interval_in_seconds;
+	}
+
+	/**
+	 * For PHP 5.2 compat, since DateTime objects can't be serialized
+	 * @return array
+	 */
+	public function __sleep() {
+		$this->start_timestamp = $this->start->getTimestamp();
+		return array(
+			'start_timestamp',
+			'interval_in_seconds'
+		);
+	}
+
+	public function __wakeup() {
+		$this->start = as_get_datetime_object($this->start_timestamp);
+	}
+}

classes/ActionScheduler_InvalidActionException.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * InvalidAction Exception.
+ *
+ * Used for identifying actions that are invalid in some way.
+ *
+ * @package Prospress\ActionScheduler
+ */
+class ActionScheduler_InvalidActionException extends \InvalidArgumentException implements ActionScheduler_Exception {
+
+	/**
+	 * Create a new exception when the action's args cannot be decoded to an array.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param string $action_id The action ID with bad args.
+	 * @return static
+	 */
+	public static function from_decoding_args( $action_id ) {
+		$message = sprintf(
+			__( 'Action [%s] has invalid arguments. It cannot be JSON decoded to an array.', 'action-scheduler' ),
+			$action_id
+		);
+
+		return new static( $message );
+	}
+}

classes/ActionScheduler_ListTable.php

@@ -0,0 +1,533 @@
+<?php
+
+/**
+ * Implements the admin view of the actions.
+ * @codeCoverageIgnore
+ */
+class ActionScheduler_ListTable extends ActionScheduler_Abstract_ListTable {
+
+	/**
+	 * The package name.
+	 *
+	 * @var string
+	 */
+	protected $package = 'action-scheduler';
+
+	/**
+	 * Columns to show (name => label).
+	 *
+	 * @var array
+	 */
+	protected $columns = array();
+
+	/**
+	 * Actions (name => label).
+	 *
+	 * @var array
+	 */
+	protected $row_actions = array();
+
+	/**
+	 * The active data stores
+	 *
+	 * @var ActionScheduler_Store
+	 */
+	protected $store;
+
+	/**
+	 * A logger to use for getting action logs to display
+	 *
+	 * @var ActionScheduler_Logger
+	 */
+	protected $logger;
+
+	/**
+	 * A ActionScheduler_QueueRunner runner instance (or child class)
+	 *
+	 * @var ActionScheduler_QueueRunner
+	 */
+	protected $runner;
+
+	/**
+	 * Bulk actions. The key of the array is the method name of the implementation:
+	 *
+	 *     bulk_<key>(array $ids, string $sql_in).
+	 *
+	 * See the comments in the parent class for further details
+	 *
+	 * @var array
+	 */
+	protected $bulk_actions = array();
+
+	/**
+	 * Flag variable to render our notifications, if any, once.
+	 *
+	 * @var bool
+	 */
+	protected static $did_notification = false;
+
+	/**
+	 * Array of seconds for common time periods, like week or month, alongside an internationalised string representation, i.e. "Day" or "Days"
+	 *
+	 * @var array
+	 */
+	private static $time_periods;
+
+	/**
+	 * Sets the current data store object into `store->action` and initialises the object.
+	 *
+	 * @param ActionScheduler_Store $store
+	 * @param ActionScheduler_Logger $logger
+	 * @param ActionScheduler_QueueRunner $runner
+	 */
+	public function __construct( ActionScheduler_Store $store, ActionScheduler_Logger $logger, ActionScheduler_QueueRunner $runner ) {
+
+		$this->store  = $store;
+		$this->logger = $logger;
+		$this->runner = $runner;
+
+		$this->table_header = __( 'Scheduled Actions', 'action-scheduler' );
+
+		$this->bulk_actions = array(
+			'delete' => __( 'Delete', 'action-scheduler' ),
+		);
+
+		$this->columns = array(
+			'hook'        => __( 'Hook', 'action-scheduler' ),
+			'status'      => __( 'Status', 'action-scheduler' ),
+			'args'        => __( 'Arguments', 'action-scheduler' ),
+			'group'       => __( 'Group', 'action-scheduler' ),
+			'recurrence'  => __( 'Recurrence', 'action-scheduler' ),
+			'schedule'    => __( 'Scheduled Date', 'action-scheduler' ),
+			'log_entries' => __( 'Log', 'action-scheduler' ),
+		);
+
+		$this->sort_by = array(
+			'schedule',
+			'hook',
+			'group',
+		);
+
+		$this->search_by = array(
+			'hook',
+			'args',
+			'claim_id',
+		);
+
+		$request_status = $this->get_request_status();
+
+		if ( empty( $request_status ) ) {
+			$this->sort_by[] = 'status';
+		} elseif ( in_array( $request_status, array( 'in-progress', 'failed' ) ) ) {
+			$this->columns  += array( 'claim_id' => __( 'Claim ID', 'action-scheduler' ) );
+			$this->sort_by[] = 'claim_id';
+		}
+
+		$this->row_actions = array(
+			'hook' => array(
+				'run' => array(
+					'name'  => __( 'Run', 'action-scheduler' ),
+					'desc'  => __( 'Process the action now as if it were run as part of a queue', 'action-scheduler' ),
+				),
+				'cancel' => array(
+					'name'  => __( 'Cancel', 'action-scheduler' ),
+					'desc'  => __( 'Cancel the action now to avoid it being run in future', 'action-scheduler' ),
+					'class' => 'cancel trash',
+				),
+			),
+		);
+
+		self::$time_periods = array(
+			array(
+				'seconds' => YEAR_IN_SECONDS,
+				'names'   => _n_noop( '%s year', '%s years', 'action-scheduler' ),
+			),
+			array(
+				'seconds' => MONTH_IN_SECONDS,
+				'names'   => _n_noop( '%s month', '%s months', 'action-scheduler' ),
+			),
+			array(
+				'seconds' => WEEK_IN_SECONDS,
+				'names'   => _n_noop( '%s week', '%s weeks', 'action-scheduler' ),
+			),
+			array(
+				'seconds' => DAY_IN_SECONDS,
+				'names'   => _n_noop( '%s day', '%s days', 'action-scheduler' ),
+			),
+			array(
+				'seconds' => HOUR_IN_SECONDS,
+				'names'   => _n_noop( '%s hour', '%s hours', 'action-scheduler' ),
+			),
+			array(
+				'seconds' => MINUTE_IN_SECONDS,
+				'names'   => _n_noop( '%s minute', '%s minutes', 'action-scheduler' ),
+			),
+			array(
+				'seconds' => 1,
+				'names'   => _n_noop( '%s second', '%s seconds', 'action-scheduler' ),
+			),
+		);
+
+		parent::__construct( array(
+			'singular' => 'action-scheduler',
+			'plural'   => 'action-scheduler',
+			'ajax'     => false,
+		) );
+	}
+
+	/**
+	 * Convert an interval of seconds into a two part human friendly string.
+	 *
+	 * The WordPress human_time_diff() function only calculates the time difference to one degree, meaning
+	 * even if an action is 1 day and 11 hours away, it will display "1 day". This function goes one step
+	 * further to display two degrees of accuracy.
+	 *
+	 * Inspired by the Crontrol::interval() function by Edward Dale: https://wordpress.org/plugins/wp-crontrol/
+	 *
+	 * @param int $interval A interval in seconds.
+	 * @param int $periods_to_include Depth of time periods to include, e.g. for an interval of 70, and $periods_to_include of 2, both minutes and seconds would be included. With a value of 1, only minutes would be included.
+	 * @return string A human friendly string representation of the interval.
+	 */
+	private static function human_interval( $interval, $periods_to_include = 2 ) {
+
+		if ( $interval <= 0 ) {
+			return __( 'Now!', 'action-scheduler' );
+		}
+
+		$output = '';
+
+		for ( $time_period_index = 0, $periods_included = 0, $seconds_remaining = $interval; $time_period_index < count( self::$time_periods ) && $seconds_remaining > 0 && $periods_included < $periods_to_include; $time_period_index++ ) {
+
+			$periods_in_interval = floor( $seconds_remaining / self::$time_periods[ $time_period_index ]['seconds'] );
+
+			if ( $periods_in_interval > 0 ) {
+				if ( ! empty( $output ) ) {
+					$output .= ' ';
+				}
+				$output .= sprintf( _n( self::$time_periods[ $time_period_index ]['names'][0], self::$time_periods[ $time_period_index ]['names'][1], $periods_in_interval, 'action-scheduler' ), $periods_in_interval );
+				$seconds_remaining -= $periods_in_interval * self::$time_periods[ $time_period_index ]['seconds'];
+				$periods_included++;
+			}
+		}
+
+		return $output;
+	}
+
+	/**
+	 * Returns the recurrence of an action or 'Non-repeating'. The output is human readable.
+	 *
+	 * @param ActionScheduler_Action $action
+	 *
+	 * @return string
+	 */
+	protected function get_recurrence( $action ) {
+		$recurrence = $action->get_schedule();
+		if ( $recurrence->is_recurring() ) {
+			if ( method_exists( $recurrence, 'interval_in_seconds' ) ) {
+				return sprintf( __( 'Every %s', 'action-scheduler' ), self::human_interval( $recurrence->interval_in_seconds() ) );
+			}
+
+			if ( method_exists( $recurrence, 'get_recurrence' ) ) {
+				return sprintf( __( 'Cron %s', 'action-scheduler' ), $recurrence->get_recurrence() );
+			}
+		}
+
+		return __( 'Non-repeating', 'action-scheduler' );
+	}
+
+	/**
+	 * Serializes the argument of an action to render it in a human friendly format.
+	 *
+	 * @param array $row The array representation of the current row of the table
+	 *
+	 * @return string
+	 */
+	public function column_args( array $row ) {
+		if ( empty( $row['args'] ) ) {
+			return '';
+		}
+
+		$row_html = '<ul>';
+		foreach ( $row['args'] as $key => $value ) {
+			$row_html .= sprintf( '<li><code>%s => %s</code></li>', esc_html( var_export( $key, true ) ), esc_html( var_export( $value, true ) ) );
+		}
+		$row_html .= '</ul>';
+
+		return apply_filters( 'action_scheduler_list_table_column_args', $row_html, $row );
+	}
+
+	/**
+	 * Prints the logs entries inline. We do so to avoid loading Javascript and other hacks to show it in a modal.
+	 *
+	 * @param array $row Action array.
+	 * @return string
+	 */
+	public function column_log_entries( array $row ) {
+
+		$log_entries_html = '<ol>';
+
+		$timezone = new DateTimezone( 'UTC' );
+
+		foreach ( $row['log_entries'] as $log_entry ) {
+			$log_entries_html .= $this->get_log_entry_html( $log_entry, $timezone );
+		}
+
+		$log_entries_html .= '</ol>';
+
+		return $log_entries_html;
+	}
+
+	/**
+	 * Prints the logs entries inline. We do so to avoid loading Javascript and other hacks to show it in a modal.
+	 *
+	 * @param ActionScheduler_LogEntry $log_entry
+	 * @param DateTimezone $timezone
+	 * @return string
+	 */
+	protected function get_log_entry_html( ActionScheduler_LogEntry $log_entry, DateTimezone $timezone ) {
+		$date = $log_entry->get_date();
+		$date->setTimezone( $timezone );
+		return sprintf( '<li><strong>%s</strong><br/>%s</li>', esc_html( $date->format( 'Y-m-d H:i:s O' ) ), esc_html( $log_entry->get_message() ) );
+	}
+
+	/**
+	 * Only display row actions for pending actions.
+	 *
+	 * @param array  $row         Row to render
+	 * @param string $column_name Current row
+	 *
+	 * @return string
+	 */
+	protected function maybe_render_actions( $row, $column_name ) {
+		if ( 'pending' === strtolower( $row['status'] ) ) {
+			return parent::maybe_render_actions( $row, $column_name );
+		}
+
+		return '';
+	}
+
+	/**
+	 * Renders admin notifications
+	 *
+	 * Notifications:
+	 *  1. When the maximum number of tasks are being executed simultaneously
+	 *  2. Notifications when a task us manually executed
+	 */
+	public function display_admin_notices() {
+
+		if ( $this->store->get_claim_count() >= $this->runner->get_allowed_concurrent_batches() ) {
+			$this->admin_notices[] = array(
+				'class'   => 'updated',
+				'message' => sprintf( __( 'Maximum simultaneous batches already in progress (%s queues). No actions will be processed until the current batches are complete.', 'action-scheduler' ), $this->store->get_claim_count() ),
+			);
+		}
+
+		$notification = get_transient( 'action_scheduler_admin_notice' );
+
+		if ( is_array( $notification ) ) {
+			delete_transient( 'action_scheduler_admin_notice' );
+
+			$action = $this->store->fetch_action( $notification['action_id'] );
+			$action_hook_html = '<strong><code>' . $action->get_hook() . '</code></strong>';
+			if ( 1 == $notification['success'] ) {
+				$class = 'updated';
+				switch ( $notification['row_action_type'] ) {
+					case 'run' :
+						$action_message_html = sprintf( __( 'Successfully executed action: %s', 'action-scheduler' ), $action_hook_html );
+						break;
+					case 'cancel' :
+						$action_message_html = sprintf( __( 'Successfully canceled action: %s', 'action-scheduler' ), $action_hook_html );
+						break;
+					default :
+						$action_message_html = sprintf( __( 'Successfully processed change for action: %s', 'action-scheduler' ), $action_hook_html );
+						break;
+				}
+			} else {
+				$class = 'error';
+				$action_message_html = sprintf( __( 'Could not process change for action: "%s" (ID: %d). Error: %s', 'action-scheduler' ), $action_hook_html, esc_html( $notification['action_id'] ), esc_html( $notification['error_message'] ) );
+			}
+
+			$action_message_html = apply_filters( 'action_scheduler_admin_notice_html', $action_message_html, $action, $notification );
+
+			$this->admin_notices[] = array(
+				'class'   => $class,
+				'message' => $action_message_html,
+			);
+		}
+
+		parent::display_admin_notices();
+	}
+
+	/**
+	 * Prints the scheduled date in a human friendly format.
+	 *
+	 * @param array $row The array representation of the current row of the table
+	 *
+	 * @return string
+	 */
+	public function column_schedule( $row ) {
+		return $this->get_schedule_display_string( $row['schedule'] );
+	}
+
+	/**
+	 * Get the scheduled date in a human friendly format.
+	 *
+	 * @param ActionScheduler_Schedule $schedule
+	 * @return string
+	 */
+	protected function get_schedule_display_string( ActionScheduler_Schedule $schedule ) {
+
+		$schedule_display_string = '';
+
+		if ( ! $schedule->next() ) {
+			return $schedule_display_string;
+		}
+
+		$next_timestamp = $schedule->next()->getTimestamp();
+
+		$schedule_display_string .= $schedule->next()->format( 'Y-m-d H:i:s O' );
+		$schedule_display_string .= '<br/>';
+
+		if ( gmdate( 'U' ) > $next_timestamp ) {
+			$schedule_display_string .= sprintf( __( ' (%s ago)', 'action-scheduler' ), self::human_interval( gmdate( 'U' ) - $next_timestamp ) );
+		} else {
+			$schedule_display_string .= sprintf( __( ' (%s)', 'action-scheduler' ), self::human_interval( $next_timestamp - gmdate( 'U' ) ) );
+		}
+
+		return $schedule_display_string;
+	}
+
+	/**
+	 * Bulk delete
+	 *
+	 * Deletes actions based on their ID. This is the handler for the bulk delete. It assumes the data
+	 * properly validated by the callee and it will delete the actions without any extra validation.
+	 *
+	 * @param array $ids
+	 * @param string $ids_sql Inherited and unused
+	 */
+	protected function bulk_delete( array $ids, $ids_sql ) {
+		foreach ( $ids as $id ) {
+			$this->store->delete_action( $id );
+		}
+	}
+
+	/**
+	 * Implements the logic behind running an action. ActionScheduler_Abstract_ListTable validates the request and their
+	 * parameters are valid.
+	 *
+	 * @param int $action_id
+	 */
+	protected function row_action_cancel( $action_id ) {
+		$this->process_row_action( $action_id, 'cancel' );
+	}
+
+	/**
+	 * Implements the logic behind running an action. ActionScheduler_Abstract_ListTable validates the request and their
+	 * parameters are valid.
+	 *
+	 * @param int $action_id
+	 */
+	protected function row_action_run( $action_id ) {
+		$this->process_row_action( $action_id, 'run' );
+	}
+
+	/**
+	 * Implements the logic behind processing an action once an action link is clicked on the list table.
+	 *
+	 * @param int $action_id
+	 * @param string $row_action_type The type of action to perform on the action.
+	 */
+	protected function process_row_action( $action_id, $row_action_type ) {
+		try {
+			switch ( $row_action_type ) {
+				case 'run' :
+					$this->runner->process_action( $action_id );
+					break;
+				case 'cancel' :
+					$this->store->cancel_action( $action_id );
+					break;
+			}
+			$success = 1;
+			$error_message = '';
+		} catch ( Exception $e ) {
+			$success = 0;
+			$error_message = $e->getMessage();
+		}
+
+		set_transient( 'action_scheduler_admin_notice', compact( 'action_id', 'success', 'error_message', 'row_action_type' ), 30 );
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function prepare_items() {
+		$this->process_bulk_action();
+
+		$this->process_row_actions();
+
+		if ( ! empty( $_REQUEST['_wp_http_referer'] ) ) {
+			// _wp_http_referer is used only on bulk actions, we remove it to keep the $_GET shorter
+			wp_redirect( remove_query_arg( array( '_wp_http_referer', '_wpnonce' ), wp_unslash( $_SERVER['REQUEST_URI'] ) ) );
+			exit;
+		}
+
+		$this->prepare_column_headers();
+
+		$per_page = $this->get_items_per_page( $this->package . '_items_per_page', $this->items_per_page );
+		$query = array(
+			'per_page' => $per_page,
+			'offset'   => $this->get_items_offset(),
+			'status'   => $this->get_request_status(),
+			'orderby'  => $this->get_request_orderby(),
+			'order'    => $this->get_request_order(),
+			'search'   => $this->get_request_search_query(),
+		);
+
+		$this->items = array();
+
+		$total_items = $this->store->query_actions( $query, 'count' );
+
+		$status_labels = $this->store->get_status_labels();
+
+		foreach ( $this->store->query_actions( $query ) as $action_id ) {
+			try {
+				$action = $this->store->fetch_action( $action_id );
+			} catch ( Exception $e ) {
+				continue;
+			}
+			$this->items[ $action_id ] = array(
+				'ID'          => $action_id,
+				'hook'        => $action->get_hook(),
+				'status'      => $status_labels[ $this->store->get_status( $action_id ) ],
+				'args'        => $action->get_args(),
+				'group'       => $action->get_group(),
+				'log_entries' => $this->logger->get_logs( $action_id ),
+				'claim_id'    => $this->store->get_claim_id( $action_id ),
+				'recurrence'  => $this->get_recurrence( $action ),
+				'schedule'    => $action->get_schedule(),
+			);
+		}
+
+		$this->set_pagination_args( array(
+			'total_items' => $total_items,
+			'per_page'    => $per_page,
+			'total_pages' => ceil( $total_items / $per_page ),
+		) );
+	}
+
+	/**
+	 * Prints the available statuses so the user can click to filter.
+	 */
+	protected function display_filter_by_status() {
+		$this->status_counts = $this->store->action_counts();
+		parent::display_filter_by_status();
+	}
+
+	/**
+	 * Get the text to display in the search box on the list table.
+	 */
+	protected function get_search_box_button_text() {
+		return __( 'Search hook, args and claim ID', 'action-scheduler' );
+	}
+}

classes/ActionScheduler_LogEntry.php

@@ -0,0 +1,67 @@
+<?php
+
+/**
+ * Class ActionScheduler_LogEntry
+ */
+class ActionScheduler_LogEntry {
+
+	/**
+	 * @var int $action_id
+	 */
+	protected $action_id =  '';
+
+	/**
+	 * @var string $message
+	 */
+	protected $message =  '';
+
+	/**
+	 * @var Datetime $date
+	 */
+	protected $date;
+
+	/**
+	 * Constructor
+	 *
+	 * @param mixed  $action_id Action ID
+	 * @param string $message   Message
+	 * @param Datetime $date    Datetime object with the time when this log entry was created. If this parameter is
+	 *                          not provided a new Datetime object (with current time) will be created.
+	 */
+	public function __construct( $action_id, $message, $date = null ) {
+
+		/*
+		 * ActionScheduler_wpCommentLogger::get_entry() previously passed a 3rd param of $comment->comment_type
+		 * to ActionScheduler_LogEntry::__construct(), goodness knows why, and the Follow-up Emails plugin
+		 * hard-codes loading its own version of ActionScheduler_wpCommentLogger with that out-dated method,
+		 * goodness knows why, so we need to guard against that here instead of using a DateTime type declaration
+		 * for the constructor's 3rd param of $date and causing a fatal error with older versions of FUE.
+		 */
+		if ( null !== $date && ! is_a( $date, 'DateTime' ) ) {
+			_doing_it_wrong( __METHOD__, 'The third parameter must be a valid DateTime instance, or null.', '2.0.0' );
+			$date = null;
+		}
+
+		$this->action_id = $action_id;
+		$this->message   = $message;
+		$this->date      = $date ? $date : new Datetime;
+	}
+
+	/**
+	 * Returns the date when this log entry was created
+	 *
+	 * @return Datetime
+	 */
+	public function get_date() {
+		return $this->date;
+	}
+
+	public function get_action_id() {
+		return $this->action_id;
+	}
+
+	public function get_message() {
+		return $this->message;
+	}
+}
+

classes/ActionScheduler_Logger.php

@@ -0,0 +1,98 @@
+<?php
+
+/**
+ * Class ActionScheduler_Logger
+ * @codeCoverageIgnore
+ */
+abstract class ActionScheduler_Logger {
+	private static $logger = NULL;
+
+	/**
+	 * @return ActionScheduler_Logger
+	 */
+	public static function instance() {
+		if ( empty(self::$logger) ) {
+			$class = apply_filters('action_scheduler_logger_class', 'ActionScheduler_wpCommentLogger');
+			self::$logger = new $class();
+		}
+		return self::$logger;
+	}
+
+	/**
+	 * @param string $action_id
+	 * @param string $message
+	 * @param DateTime $date
+	 *
+	 * @return string The log entry ID
+	 */
+	abstract public function log( $action_id, $message, DateTime $date = NULL );
+
+	/**
+	 * @param string $entry_id
+	 *
+	 * @return ActionScheduler_LogEntry
+	 */
+	abstract public function get_entry( $entry_id );
+
+	/**
+	 * @param string $action_id
+	 *
+	 * @return ActionScheduler_LogEntry[]
+	 */
+	abstract public function get_logs( $action_id );
+
+
+	/**
+	 * @codeCoverageIgnore
+	 */
+	public function init() {
+		add_action( 'action_scheduler_stored_action', array( $this, 'log_stored_action' ), 10, 1 );
+		add_action( 'action_scheduler_canceled_action', array( $this, 'log_canceled_action' ), 10, 1 );
+		add_action( 'action_scheduler_before_execute', array( $this, 'log_started_action' ), 10, 1 );
+		add_action( 'action_scheduler_after_execute', array( $this, 'log_completed_action' ), 10, 1 );
+		add_action( 'action_scheduler_failed_execution', array( $this, 'log_failed_action' ), 10, 2 );
+		add_action( 'action_scheduler_failed_action', array( $this, 'log_timed_out_action' ), 10, 2 );
+		add_action( 'action_scheduler_unexpected_shutdown', array( $this, 'log_unexpected_shutdown' ), 10, 2 );
+		add_action( 'action_scheduler_reset_action', array( $this, 'log_reset_action' ), 10, 1 );
+		add_action( 'action_scheduler_execution_ignored', array( $this, 'log_ignored_action' ), 10, 1 );
+	}
+
+	public function log_stored_action( $action_id ) {
+		$this->log( $action_id, __( 'action created', 'action-scheduler' ) );
+	}
+
+	public function log_canceled_action( $action_id ) {
+		$this->log( $action_id, __( 'action canceled', 'action-scheduler' ) );
+	}
+
+	public function log_started_action( $action_id ) {
+		$this->log( $action_id, __( 'action started', 'action-scheduler' ) );
+	}
+
+	public function log_completed_action( $action_id ) {
+		$this->log( $action_id, __( 'action complete', 'action-scheduler' ) );
+	}
+
+	public function log_failed_action( $action_id, Exception $exception ) {
+		$this->log( $action_id, sprintf( __( 'action failed: %s', 'action-scheduler' ), $exception->getMessage() ) );
+	}
+
+	public function log_timed_out_action( $action_id, $timeout ) {
+		$this->log( $action_id, sprintf( __( 'action timed out after %s seconds', 'action-scheduler' ), $timeout ) );
+	}
+
+	public function log_unexpected_shutdown( $action_id, $error ) {
+		if ( ! empty( $error ) ) {
+			$this->log( $action_id, sprintf( __( 'unexpected shutdown: PHP Fatal error %s in %s on line %s', 'action-scheduler' ), $error['message'], $error['file'], $error['line'] ) );
+		}
+	}
+
+	public function log_reset_action( $action_id ) {
+		$this->log( $action_id, __( 'action reset', 'action_scheduler' ) );
+	}
+
+	public function log_ignored_action( $action_id ) {
+		$this->log( $action_id, __( 'action ignored', 'action-scheduler' ) );
+	}
+}
+ 

classes/ActionScheduler_NullAction.php

@@ -0,0 +1,16 @@
+<?php
+
+/**
+ * Class ActionScheduler_NullAction
+ */
+class ActionScheduler_NullAction extends ActionScheduler_Action {
+
+	public function __construct( $hook = '', array $args = array(), ActionScheduler_Schedule $schedule = NULL ) {
+		$this->set_schedule( new ActionScheduler_NullSchedule() );
+	}
+
+	public function execute() {
+		// don't execute
+	}
+}
+ 

classes/ActionScheduler_NullLogEntry.php

@@ -0,0 +1,11 @@
+<?php
+
+/**
+ * Class ActionScheduler_NullLogEntry
+ */
+class ActionScheduler_NullLogEntry extends ActionScheduler_LogEntry {
+	public function __construct( $action_id = '', $message = '' ) {
+		// nothing to see here
+	}
+}
+ 

classes/ActionScheduler_NullSchedule.php

@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * Class ActionScheduler_NullSchedule
+ */
+class ActionScheduler_NullSchedule implements ActionScheduler_Schedule {
+
+	public function next( DateTime $after = NULL ) {
+		return NULL;
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function is_recurring() {
+		return false;
+	}
+}
+ 

classes/ActionScheduler_QueueCleaner.php

@@ -0,0 +1,155 @@
+<?php
+
+/**
+ * Class ActionScheduler_QueueCleaner
+ */
+class ActionScheduler_QueueCleaner {
+
+	/** @var int */
+	protected $batch_size;
+
+	/** @var ActionScheduler_Store */
+	private $store = null;
+
+	/**
+	 * 31 days in seconds.
+	 *
+	 * @var int
+	 */
+	private $month_in_seconds = 2678400;
+
+	/**
+	 * ActionScheduler_QueueCleaner constructor.
+	 *
+	 * @param ActionScheduler_Store $store      The store instance.
+	 * @param int                   $batch_size The batch size.
+	 */
+	public function __construct( ActionScheduler_Store $store = null, $batch_size = 20 ) {
+		$this->store = $store ? $store : ActionScheduler_Store::instance();
+		$this->batch_size = $batch_size;
+	}
+
+	public function delete_old_actions() {
+		$lifespan = apply_filters( 'action_scheduler_retention_period', $this->month_in_seconds );
+		$cutoff = as_get_datetime_object($lifespan.' seconds ago');
+
+		$statuses_to_purge = array(
+			ActionScheduler_Store::STATUS_COMPLETE,
+			ActionScheduler_Store::STATUS_CANCELED,
+		);
+
+		foreach ( $statuses_to_purge as $status ) {
+			$actions_to_delete = $this->store->query_actions( array(
+				'status'           => $status,
+				'modified'         => $cutoff,
+				'modified_compare' => '<=',
+				'per_page'         => $this->get_batch_size(),
+			) );
+
+			foreach ( $actions_to_delete as $action_id ) {
+				try {
+					$this->store->delete_action( $action_id );
+				} catch ( Exception $e ) {
+
+					/**
+					 * Notify 3rd party code of exceptions when deleting a completed action older than the retention period
+					 *
+					 * This hook provides a way for 3rd party code to log or otherwise handle exceptions relating to their
+					 * actions.
+					 *
+					 * @since 2.0.0
+					 *
+					 * @param int $action_id The scheduled actions ID in the data store
+					 * @param Exception $e The exception thrown when attempting to delete the action from the data store
+					 * @param int $lifespan The retention period, in seconds, for old actions
+					 * @param int $count_of_actions_to_delete The number of old actions being deleted in this batch
+					 */
+					do_action( 'action_scheduler_failed_old_action_deletion', $action_id, $e, $lifespan, count( $actions_to_delete ) );
+				}
+			}
+		}
+	}
+
+	/**
+	 * Unclaim pending actions that have not been run within a given time limit.
+	 *
+	 * When called by ActionScheduler_Abstract_QueueRunner::run_cleanup(), the time limit passed
+	 * as a parameter is 10x the time limit used for queue processing.
+	 *
+	 * @param int $time_limit The number of seconds to allow a queue to run before unclaiming its pending actions. Default 300 (5 minutes).
+	 */
+	public function reset_timeouts( $time_limit = 300 ) {
+		$timeout = apply_filters( 'action_scheduler_timeout_period', $time_limit );
+		if ( $timeout < 0 ) {
+			return;
+		}
+		$cutoff = as_get_datetime_object($timeout.' seconds ago');
+		$actions_to_reset = $this->store->query_actions( array(
+			'status'           => ActionScheduler_Store::STATUS_PENDING,
+			'modified'         => $cutoff,
+			'modified_compare' => '<=',
+			'claimed'          => true,
+			'per_page'         => $this->get_batch_size(),
+		) );
+
+		foreach ( $actions_to_reset as $action_id ) {
+			$this->store->unclaim_action( $action_id );
+			do_action( 'action_scheduler_reset_action', $action_id );
+		}
+	}
+
+	/**
+	 * Mark actions that have been running for more than a given time limit as failed, based on
+	 * the assumption some uncatachable and unloggable fatal error occurred during processing.
+	 *
+	 * When called by ActionScheduler_Abstract_QueueRunner::run_cleanup(), the time limit passed
+	 * as a parameter is 10x the time limit used for queue processing.
+	 *
+	 * @param int $time_limit The number of seconds to allow an action to run before it is considered to have failed. Default 300 (5 minutes).
+	 */
+	public function mark_failures( $time_limit = 300 ) {
+		$timeout = apply_filters( 'action_scheduler_failure_period', $time_limit );
+		if ( $timeout < 0 ) {
+			return;
+		}
+		$cutoff = as_get_datetime_object($timeout.' seconds ago');
+		$actions_to_reset = $this->store->query_actions( array(
+			'status'           => ActionScheduler_Store::STATUS_RUNNING,
+			'modified'         => $cutoff,
+			'modified_compare' => '<=',
+			'per_page'         => $this->get_batch_size(),
+		) );
+
+		foreach ( $actions_to_reset as $action_id ) {
+			$this->store->mark_failure( $action_id );
+			do_action( 'action_scheduler_failed_action', $action_id, $timeout );
+		}
+	}
+
+	/**
+	 * Do all of the cleaning actions.
+	 *
+	 * @param int $time_limit The number of seconds to use as the timeout and failure period. Default 300 (5 minutes).
+	 * @author Jeremy Pry
+	 */
+	public function clean( $time_limit = 300 ) {
+		$this->delete_old_actions();
+		$this->reset_timeouts( $time_limit );
+		$this->mark_failures( $time_limit );
+	}
+
+	/**
+	 * Get the batch size for cleaning the queue.
+	 *
+	 * @author Jeremy Pry
+	 * @return int
+	 */
+	protected function get_batch_size() {
+		/**
+		 * Filter the batch size when cleaning the queue.
+		 *
+		 * @param int $batch_size The number of actions to clean in one batch.
+		 */
+		return absint( apply_filters( 'action_scheduler_cleanup_batch_size', $this->batch_size ) );
+	}
+}

classes/ActionScheduler_QueueRunner.php

@@ -0,0 +1,115 @@
+<?php
+
+/**
+ * Class ActionScheduler_QueueRunner
+ */
+class ActionScheduler_QueueRunner extends ActionScheduler_Abstract_QueueRunner {
+	const WP_CRON_HOOK = 'action_scheduler_run_queue';
+
+	const WP_CRON_SCHEDULE = 'every_minute';
+
+	/** @var ActionScheduler_QueueRunner  */
+	private static $runner = null;
+
+	/**
+	 * @return ActionScheduler_QueueRunner
+	 * @codeCoverageIgnore
+	 */
+	public static function instance() {
+		if ( empty(self::$runner) ) {
+			$class = apply_filters('action_scheduler_queue_runner_class', 'ActionScheduler_QueueRunner');
+			self::$runner = new $class();
+		}
+		return self::$runner;
+	}
+
+	/**
+	 * ActionScheduler_QueueRunner constructor.
+	 *
+	 * @param ActionScheduler_Store             $store
+	 * @param ActionScheduler_FatalErrorMonitor $monitor
+	 * @param ActionScheduler_QueueCleaner      $cleaner
+	 */
+	public function __construct( ActionScheduler_Store $store = null, ActionScheduler_FatalErrorMonitor $monitor = null, ActionScheduler_QueueCleaner $cleaner = null ) {
+		parent::__construct( $store, $monitor, $cleaner );
+	}
+
+	/**
+	 * @codeCoverageIgnore
+	 */
+	public function init() {
+
+		add_filter( 'cron_schedules', array( self::instance(), 'add_wp_cron_schedule' ) );
+
+		if ( !wp_next_scheduled(self::WP_CRON_HOOK) ) {
+			$schedule = apply_filters( 'action_scheduler_run_schedule', self::WP_CRON_SCHEDULE );
+			wp_schedule_event( time(), $schedule, self::WP_CRON_HOOK );
+		}
+
+		add_action( self::WP_CRON_HOOK, array( self::instance(), 'run' ) );
+	}
+
+	public function run() {
+		ActionScheduler_Compatibility::raise_memory_limit();
+		ActionScheduler_Compatibility::raise_time_limit( $this->get_time_limit() );
+		do_action( 'action_scheduler_before_process_queue' );
+		$this->run_cleanup();
+		$processed_actions = 0;
+		if ( $this->store->get_claim_count() < $this->get_allowed_concurrent_batches() ) {
+			$batch_size = apply_filters( 'action_scheduler_queue_runner_batch_size', 25 );
+			do {
+				$processed_actions_in_batch = $this->do_batch( $batch_size );
+				$processed_actions         += $processed_actions_in_batch;
+			} while ( $processed_actions_in_batch > 0 && ! $this->batch_limits_exceeded( $processed_actions ) ); // keep going until we run out of actions, time, or memory
+		}
+
+		do_action( 'action_scheduler_after_process_queue' );
+		return $processed_actions;
+	}
+
+	protected function do_batch( $size = 100 ) {
+		$claim = $this->store->stake_claim($size);
+		$this->monitor->attach($claim);
+		$processed_actions = 0;
+
+		foreach ( $claim->get_actions() as $action_id ) {
+			// bail if we lost the claim
+			if ( ! in_array( $action_id, $this->store->find_actions_by_claim_id( $claim->get_id() ) ) ) {
+				break;
+			}
+			$this->process_action( $action_id );
+			$processed_actions++;
+
+			if ( $this->batch_limits_exceeded( $processed_actions ) ) {
+				break;
+			}
+		}
+		$this->store->release_claim($claim);
+		$this->monitor->detach();
+		$this->clear_caches();
+		return $processed_actions;
+	}
+
+	/**
+	 * Running large batches can eat up memory, as WP adds data to its object cache.
+	 *
+	 * If using a persistent object store, this has the side effect of flushing that
+	 * as well, so this is disabled by default. To enable:
+	 *
+	 * add_filter( 'action_scheduler_queue_runner_flush_cache', '__return_true' );
+	 */
+	protected function clear_caches() {
+		if ( ! wp_using_ext_object_cache() || apply_filters( 'action_scheduler_queue_runner_flush_cache', false ) ) {
+			wp_cache_flush();
+		}
+	}
+
+	public function add_wp_cron_schedule( $schedules ) {
+		$schedules['every_minute'] = array(
+			'interval' => 60, // in seconds
+			'display'  => __( 'Every minute' ),
+		);
+
+		return $schedules;
+	}
+}

classes/ActionScheduler_Schedule.php

@@ -0,0 +1,18 @@
+<?php
+
+/**
+ * Class ActionScheduler_Schedule
+ */
+interface ActionScheduler_Schedule {
+	/**
+	 * @param DateTime $after
+	 * @return DateTime|null
+	 */
+	public function next( DateTime $after = NULL );
+
+	/**
+	 * @return bool
+	 */
+	public function is_recurring();
+}
+ 

classes/ActionScheduler_SimpleSchedule.php

@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * Class ActionScheduler_SimpleSchedule
+ */
+class ActionScheduler_SimpleSchedule implements ActionScheduler_Schedule {
+	private $date = NULL;
+	private $timestamp = 0;
+	public function __construct( DateTime $date ) {
+		$this->date = clone $date;
+	}
+
+	/**
+	 * @param DateTime $after
+	 *
+	 * @return DateTime|null
+	 */
+	public function next( DateTime $after = NULL ) {
+		$after = empty($after) ? as_get_datetime_object('@0') : $after;
+		return ( $after > $this->date ) ? NULL : clone $this->date;
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function is_recurring() {
+		return false;
+	}
+
+	/**
+	 * For PHP 5.2 compat, since DateTime objects can't be serialized
+	 * @return array
+	 */
+	public function __sleep() {
+		$this->timestamp = $this->date->getTimestamp();
+		return array(
+			'timestamp',
+		);
+	}
+
+	public function __wakeup() {
+		$this->date = as_get_datetime_object($this->timestamp);
+	}
+}

classes/ActionScheduler_Store.php

@@ -0,0 +1,212 @@
+<?php
+
+/**
+ * Class ActionScheduler_Store
+ * @codeCoverageIgnore
+ */
+abstract class ActionScheduler_Store {
+	const STATUS_COMPLETE = 'complete';
+	const STATUS_PENDING  = 'pending';
+	const STATUS_RUNNING  = 'in-progress';
+	const STATUS_FAILED   = 'failed';
+	const STATUS_CANCELED = 'canceled';
+
+	/** @var ActionScheduler_Store */
+	private static $store = NULL;
+
+	/**
+	 * @param ActionScheduler_Action $action
+	 * @param DateTime $scheduled_date Optional Date of the first instance
+	 *        to store. Otherwise uses the first date of the action's
+	 *        schedule.
+	 *
+	 * @return string The action ID
+	 */
+	abstract public function save_action( ActionScheduler_Action $action, DateTime $scheduled_date = NULL );
+
+	/**
+	 * @param string $action_id
+	 *
+	 * @return ActionScheduler_Action
+	 */
+	abstract public function fetch_action( $action_id );
+
+	/**
+	 * @param string $hook
+	 * @param array $params
+	 * @return string ID of the next action matching the criteria
+	 */
+	abstract public function find_action( $hook, $params = array() );
+
+	/**
+	 * @param array $query
+	 * @return array The IDs of actions matching the query
+	 */
+	abstract public function query_actions( $query = array() );
+
+	/**
+	 * Get a count of all actions in the store, grouped by status
+	 *
+	 * @return array
+	 */
+	abstract public function action_counts();
+
+	/**
+	 * @param string $action_id
+	 */
+	abstract public function cancel_action( $action_id );
+
+	/**
+	 * @param string $action_id
+	 */
+	abstract public function delete_action( $action_id );
+
+	/**
+	 * @param string $action_id
+	 *
+	 * @return DateTime The date the action is schedule to run, or the date that it ran.
+	 */
+	abstract public function get_date( $action_id );
+
+
+	/**
+	 * @param int      $max_actions
+	 * @param DateTime $before_date Claim only actions schedule before the given date. Defaults to now.
+	 * @param array    $hooks       Claim only actions with a hook or hooks.
+	 * @param string   $group       Claim only actions in the given group.
+	 *
+	 * @return ActionScheduler_ActionClaim
+	 */
+	abstract public function stake_claim( $max_actions = 10, DateTime $before_date = null, $hooks = array(), $group = '' );
+
+	/**
+	 * @return int
+	 */
+	abstract public function get_claim_count();
+
+	/**
+	 * @param ActionScheduler_ActionClaim $claim
+	 */
+	abstract public function release_claim( ActionScheduler_ActionClaim $claim );
+
+	/**
+	 * @param string $action_id
+	 */
+	abstract public function unclaim_action( $action_id );
+
+	/**
+	 * @param string $action_id
+	 */
+	abstract public function mark_failure( $action_id );
+
+	/**
+	 * @param string $action_id
+	 */
+	abstract public function log_execution( $action_id );
+
+	/**
+	 * @param string $action_id
+	 */
+	abstract public function mark_complete( $action_id );
+
+	/**
+	 * @param string $action_id
+	 *
+	 * @return string
+	 */
+	abstract public function get_status( $action_id );
+
+	/**
+	 * @param string $action_id
+	 * @return mixed
+	 */
+	abstract public function get_claim_id( $action_id );
+
+	/**
+	 * @param string $claim_id
+	 * @return array
+	 */
+	abstract public function find_actions_by_claim_id( $claim_id );
+
+	/**
+	 * @param string $comparison_operator
+	 * @return string
+	 */
+	protected function validate_sql_comparator( $comparison_operator ) {
+		if ( in_array( $comparison_operator, array('!=', '>', '>=', '<', '<=', '=') ) ) {
+			return $comparison_operator;
+		}
+		return '=';
+	}
+
+	/**
+	 * Get the time MySQL formated date/time string for an action's (next) scheduled date.
+	 *
+	 * @param ActionScheduler_Action $action
+	 * @param DateTime $scheduled_date (optional)
+	 * @return string
+	 */
+	protected function get_scheduled_date_string( ActionScheduler_Action $action, DateTime $scheduled_date = NULL ) {
+		$next = null === $scheduled_date ? $action->get_schedule()->next() : $scheduled_date;
+		if ( ! $next ) {
+			throw new InvalidArgumentException( __( 'Invalid schedule. Cannot save action.', 'action-scheduler' ) );
+		}
+		$next->setTimezone( new DateTimeZone( 'UTC' ) );
+
+		return $next->format( 'Y-m-d H:i:s' );
+	}
+
+	/**
+	 * Get the time MySQL formated date/time string for an action's (next) scheduled date.
+	 *
+	 * @param ActionScheduler_Action $action
+	 * @param DateTime $scheduled_date (optional)
+	 * @return string
+	 */
+	protected function get_scheduled_date_string_local( ActionScheduler_Action $action, DateTime $scheduled_date = NULL ) {
+		$next = null === $scheduled_date ? $action->get_schedule()->next() : $scheduled_date;
+		if ( ! $next ) {
+			throw new InvalidArgumentException( __( 'Invalid schedule. Cannot save action.', 'action-scheduler' ) );
+		}
+
+		ActionScheduler_TimezoneHelper::set_local_timezone( $next );
+		return $next->format( 'Y-m-d H:i:s' );
+	}
+
+	/**
+	 * @return array
+	 */
+	public function get_status_labels() {
+		return array(
+			self::STATUS_COMPLETE => __( 'Complete', 'action-scheduler' ),
+			self::STATUS_PENDING  => __( 'Pending', 'action-scheduler' ),
+			self::STATUS_RUNNING  => __( 'In-progress', 'action-scheduler' ),
+			self::STATUS_FAILED   => __( 'Failed', 'action-scheduler' ),
+			self::STATUS_CANCELED => __( 'Canceled', 'action-scheduler' ),
+		);
+	}
+
+	public function init() {}
+
+	/**
+	 * @return ActionScheduler_Store
+	 */
+	public static function instance() {
+		if ( empty(self::$store) ) {
+			$class = apply_filters('action_scheduler_store_class', 'ActionScheduler_wpPostStore');
+			self::$store = new $class();
+		}
+		return self::$store;
+	}
+
+	/**
+	 * Get the site's local time.
+	 *
+	 * @deprecated 2.1.0
+	 * @return DateTimeZone
+	 */
+	protected function get_local_timezone() {
+		_deprecated_function( __FUNCTION__, '2.1.0', 'ActionScheduler_TimezoneHelper::set_local_timezone()' );
+		return ActionScheduler_TimezoneHelper::get_local_timezone();
+	}
+}

classes/ActionScheduler_TimezoneHelper.php

@@ -0,0 +1,152 @@
+<?php
+
+/**
+ * Class ActionScheduler_TimezoneHelper
+ */
+abstract class ActionScheduler_TimezoneHelper {
+	private static $local_timezone = NULL;
+
+	/**
+	 * Set a DateTime's timezone to the WordPress site's timezone, or a UTC offset
+	 * if no timezone string is available.
+	 *
+	 * @since  2.1.0
+	 *
+	 * @param DateTime $date
+	 * @return ActionScheduler_DateTime
+	 */
+	public static function set_local_timezone( DateTime $date ) {
+
+		// Accept a DateTime for easier backward compatibility, even though we require methods on ActionScheduler_DateTime
+		if ( ! is_a( $date, 'ActionScheduler_DateTime' ) ) {
+			$date = as_get_datetime_object( $date->format( 'U' ) );
+		}
+
+		if ( get_option( 'timezone_string' ) ) {
+			$date->setTimezone( new DateTimeZone( self::get_local_timezone_string() ) );
+		} else {
+			$date->setUtcOffset( self::get_local_timezone_offset() );
+		}
+
+		return $date;
+	}
+
+	/**
+	 * Helper to retrieve the timezone string for a site until a WP core method exists
+	 * (see https://core.trac.wordpress.org/ticket/24730).
+	 *
+	 * Adapted from wc_timezone_string() and https://secure.php.net/manual/en/function.timezone-name-from-abbr.php#89155.
+	 *
+	 * If no timezone string is set, and its not possible to match the UTC offset set for the site to a timezone
+	 * string, then an empty string will be returned, and the UTC offset should be used to set a DateTime's
+	 * timezone.
+	 *
+	 * @since 2.1.0
+	 * @return string PHP timezone string for the site or empty if no timezone string is available.
+	 */
+	protected static function get_local_timezone_string( $reset = false ) {
+		// If site timezone string exists, return it.
+		$timezone = get_option( 'timezone_string' );
+		if ( $timezone ) {
+			return $timezone;
+		}
+
+		// Get UTC offset, if it isn't set then return UTC.
+		$utc_offset = intval( get_option( 'gmt_offset', 0 ) );
+		if ( 0 === $utc_offset ) {
+			return 'UTC';
+		}
+
+		// Adjust UTC offset from hours to seconds.
+		$utc_offset *= 3600;
+
+		// Attempt to guess the timezone string from the UTC offset.
+		$timezone = timezone_name_from_abbr( '', $utc_offset );
+		if ( $timezone ) {
+			return $timezone;
+		}
+
+		// Last try, guess timezone string manually.
+		foreach ( timezone_abbreviations_list() as $abbr ) {
+			foreach ( $abbr as $city ) {
+				if ( (bool) date( 'I' ) === (bool) $city['dst'] && $city['timezone_id'] && intval( $city['offset'] ) === $utc_offset ) {
+					return $city['timezone_id'];
+				}
+			}
+		}
+
+		// No timezone string
+		return '';
+	}
+
+	/**
+	 * Get timezone offset in seconds.
+	 *
+	 * @since  2.1.0
+	 * @return float
+	 */
+	protected static function get_local_timezone_offset() {
+		$timezone = get_option( 'timezone_string' );
+
+		if ( $timezone ) {
+			$timezone_object = new DateTimeZone( $timezone );
+			return $timezone_object->getOffset( new DateTime( 'now' ) );
+		} else {
+			return floatval( get_option( 'gmt_offset', 0 ) ) * HOUR_IN_SECONDS;
+		}
+	}
+
+	/**
+	 * @deprecated 2.1.0
+	 */
+	public static function get_local_timezone( $reset = FALSE ) {
+		_deprecated_function( __FUNCTION__, '2.1.0', 'ActionScheduler_TimezoneHelper::set_local_timezone()' );
+		if ( $reset ) {
+			self::$local_timezone = NULL;
+		}
+		if ( !isset(self::$local_timezone) ) {
+			$tzstring = get_option('timezone_string');
+
+			if ( empty($tzstring) ) {
+				$gmt_offset = get_option('gmt_offset');
+				if ( $gmt_offset == 0 ) {
+					$tzstring = 'UTC';
+				} else {
+					$gmt_offset *= HOUR_IN_SECONDS;
+					$tzstring   = timezone_name_from_abbr( '', $gmt_offset, 1 );
+
+					// If there's no timezone string, try again with no DST.
+					if ( false === $tzstring ) {
+						$tzstring = timezone_name_from_abbr( '', $gmt_offset, 0 );
+					}
+
+					// Try mapping to the first abbreviation we can find.
+					if ( false === $tzstring ) {
+						$is_dst = date( 'I' );
+						foreach ( timezone_abbreviations_list() as $abbr ) {
+							foreach ( $abbr as $city ) {
+								if ( $city['dst'] == $is_dst && $city['offset'] == $gmt_offset ) {
+									// If there's no valid timezone ID, keep looking.
+									if ( null === $city['timezone_id'] ) {
+										continue;
+									}
+
+									$tzstring = $city['timezone_id'];
+									break 2;
+								}
+							}
+						}
+					}
+
+					// If we still have no valid string, then fall back to UTC.
+					if ( false === $tzstring ) {
+						$tzstring = 'UTC';
+					}
+				}
+			}
+
+			self::$local_timezone = new DateTimeZone($tzstring);
+		}
+		return self::$local_timezone;
+	}
+}

classes/ActionScheduler_Versions.php

@@ -0,0 +1,62 @@
+<?php
+
+/**
+ * Class ActionScheduler_Versions
+ */
+class ActionScheduler_Versions {
+	/**
+	 * @var ActionScheduler_Versions
+	 */
+	private static $instance = NULL;
+
+	private $versions = array();
+
+	public function register( $version_string, $initialization_callback ) {
+		if ( isset($this->versions[$version_string]) ) {
+			return FALSE;
+		}
+		$this->versions[$version_string] = $initialization_callback;
+		return TRUE;
+	}
+
+	public function get_versions() {
+		return $this->versions;
+	}
+
+	public function latest_version() {
+		$keys = array_keys($this->versions);
+		if ( empty($keys) ) {
+			return false;
+		}
+		uasort( $keys, 'version_compare' );
+		return end($keys);
+	}
+
+	public function latest_version_callback() {
+		$latest = $this->latest_version();
+		if ( empty($latest) || !isset($this->versions[$latest]) ) {
+			return '__return_null';
+		}
+		return $this->versions[$latest];
+	}
+
+	/**
+	 * @return ActionScheduler_Versions
+	 * @codeCoverageIgnore
+	 */
+	public static function instance() {
+		if ( empty(self::$instance) ) {
+			self::$instance = new self();
+		}
+		return self::$instance;
+	}
+
+	/**
+	 * @codeCoverageIgnore
+	 */
+	public static function initialize_latest_version() {
+		$self = self::instance();
+		call_user_func($self->latest_version_callback());
+	}
+}
+ 

classes/ActionScheduler_WPCLI_QueueRunner.php

@@ -0,0 +1,217 @@
+<?php
+
+/**
+ * WP CLI Queue runner.
+ *
+ * This class can only be called from within a WP CLI instance.
+ */
+class ActionScheduler_WPCLI_QueueRunner extends ActionScheduler_Abstract_QueueRunner {
+
+	/** @var array */
+	protected $actions;
+
+	/** @var  ActionScheduler_ActionClaim */
+	protected $claim;
+
+	/** @var \cli\progress\Bar */
+	protected $progress_bar;
+
+	/**
+	 * ActionScheduler_WPCLI_QueueRunner constructor.
+	 *
+	 * @param ActionScheduler_Store             $store
+	 * @param ActionScheduler_FatalErrorMonitor $monitor
+	 * @param ActionScheduler_QueueCleaner      $cleaner
+	 *
+	 * @throws Exception When this is not run within WP CLI
+	 */
+	public function __construct( ActionScheduler_Store $store = null, ActionScheduler_FatalErrorMonitor $monitor = null, ActionScheduler_QueueCleaner $cleaner = null ) {
+		if ( ! ( defined( 'WP_CLI' ) && WP_CLI ) ) {
+			/* translators: %s php class name */
+			throw new Exception( sprintf( __( 'The %s class can only be run within WP CLI.', 'action-scheduler' ), __CLASS__ ) );
+		}
+
+		parent::__construct( $store, $monitor, $cleaner );
+	}
+
+	/**
+	 * Set up the Queue before processing.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param int    $batch_size The batch size to process.
+	 * @param array  $hooks      The hooks being used to filter the actions claimed in this batch.
+	 * @param string $group      The group of actions to claim with this batch.
+	 * @param bool   $force      Whether to force running even with too many concurrent processes.
+	 *
+	 * @return int The number of actions that will be run.
+	 * @throws \WP_CLI\ExitException When there are too many concurrent batches.
+	 */
+	public function setup( $batch_size, $hooks = array(), $group = '', $force = false ) {
+		$this->run_cleanup();
+		$this->add_hooks();
+
+		// Check to make sure there aren't too many concurrent processes running.
+		$claim_count = $this->store->get_claim_count();
+		$too_many    = $claim_count >= $this->get_allowed_concurrent_batches();
+		if ( $too_many ) {
+			if ( $force ) {
+				WP_CLI::warning( __( 'There are too many concurrent batches, but the run is forced to continue.', 'action-scheduler' ) );
+			} else {
+				WP_CLI::error( __( 'There are too many concurrent batches.', 'action-scheduler' ) );
+			}
+		}
+
+		// Stake a claim and store it.
+		$this->claim = $this->store->stake_claim( $batch_size, null, $hooks, $group );
+		$this->monitor->attach( $this->claim );
+		$this->actions = $this->claim->get_actions();
+
+		return count( $this->actions );
+	}
+
+	/**
+	 * Add our hooks to the appropriate actions.
+	 *
+	 * @author Jeremy Pry
+	 */
+	protected function add_hooks() {
+		add_action( 'action_scheduler_before_execute', array( $this, 'before_execute' ) );
+		add_action( 'action_scheduler_after_execute', array( $this, 'after_execute' ), 10, 2 );
+		add_action( 'action_scheduler_failed_execution', array( $this, 'action_failed' ), 10, 2 );
+	}
+
+	/**
+	 * Set up the WP CLI progress bar.
+	 *
+	 * @author Jeremy Pry
+	 */
+	protected function setup_progress_bar() {
+		$count              = count( $this->actions );
+		$this->progress_bar = \WP_CLI\Utils\make_progress_bar(
+			sprintf( _n( 'Running %d action', 'Running %d actions', $count, 'action-scheduler' ), number_format_i18n( $count ) ),
+			$count
+		);
+	}
+
+	/**
+	 * Process actions in the queue.
+	 *
+	 * @author Jeremy Pry
+	 * @return int The number of actions processed.
+	 */
+	public function run() {
+		do_action( 'action_scheduler_before_process_queue' );
+		$this->setup_progress_bar();
+		foreach ( $this->actions as $action_id ) {
+			// Error if we lost the claim.
+			if ( ! in_array( $action_id, $this->store->find_actions_by_claim_id( $this->claim->get_id() ) ) ) {
+				WP_CLI::warning( __( 'The claim has been lost. Aborting current batch.', 'action-scheduler' ) );
+				break;
+			}
+
+			$this->process_action( $action_id );
+			$this->progress_bar->tick();
+			$this->maybe_stop_the_insanity();
+		}
+
+		$completed = $this->progress_bar->current();
+		$this->progress_bar->finish();
+		$this->store->release_claim( $this->claim );
+		do_action( 'action_scheduler_after_process_queue' );
+
+		return $completed;
+	}
+
+	/**
+	 * Handle WP CLI message when the action is starting.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param $action_id
+	 */
+	public function before_execute( $action_id ) {
+		/* translators: %s refers to the action ID */
+		WP_CLI::log( sprintf( __( 'Started processing action %s', 'action-scheduler' ), $action_id ) );
+	}
+
+	/**
+	 * Handle WP CLI message when the action has completed.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param int $action_id
+	 * @param null|ActionScheduler_Action $action The instance of the action. Default to null for backward compatibility.
+	 */
+	public function after_execute( $action_id, $action = null ) {
+		// backward compatibility
+		if ( null === $action ) {
+			$action = $this->store->fetch_action( $action_id );
+		}
+		/* translators: %s refers to the action ID */
+		WP_CLI::log( sprintf( __( 'Completed processing action %s with hook: %s', 'action-scheduler' ), $action_id, $action->get_hook() ) );
+	}
+
+	/**
+	 * Handle WP CLI message when the action has failed.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param int       $action_id
+	 * @param Exception $exception
+	 * @throws \WP_CLI\ExitException With failure message.
+	 */
+	public function action_failed( $action_id, $exception ) {
+		WP_CLI::error(
+			/* translators: %1$s refers to the action ID, %2$s refers to the Exception message */
+			sprintf( __( 'Error processing action %1$s: %2$s', 'action-scheduler' ), $action_id, $exception->getMessage() ),
+			false
+		);
+	}
+
+	/**
+	 * Sleep and help avoid hitting memory limit
+	 *
+	 * @param int $sleep_time Amount of seconds to sleep
+	 */
+	protected function stop_the_insanity( $sleep_time = 0 ) {
+		if ( 0 < $sleep_time ) {
+			WP_CLI::warning( sprintf( 'Stopped the insanity for %d %s', $sleep_time, _n( 'second', 'seconds', $sleep_time ) ) );
+			sleep( $sleep_time );
+		}
+
+		WP_CLI::warning( __( 'Attempting to reduce used memory...', 'action-scheduler' ) );
+
+		/**
+		 * @var $wpdb            \wpdb
+		 * @var $wp_object_cache \WP_Object_Cache
+		 */
+		global $wpdb, $wp_object_cache;
+
+		$wpdb->queries = array();
+
+		if ( ! is_object( $wp_object_cache ) ) {
+			return;
+		}
+
+		$wp_object_cache->group_ops      = array();
+		$wp_object_cache->stats          = array();
+		$wp_object_cache->memcache_debug = array();
+		$wp_object_cache->cache          = array();
+
+		if ( is_callable( array( $wp_object_cache, '__remoteset' ) ) ) {
+			call_user_func( array( $wp_object_cache, '__remoteset' ) ); // important
+		}
+	}
+
+	/**
+	 * Maybe trigger the stop_the_insanity() method to free up memory.
+	 */
+	protected function maybe_stop_the_insanity() {
+		// The value returned by progress_bar->current() might be padded. Remove padding, and convert to int.
+		$current_iteration = intval( trim( $this->progress_bar->current() ) );
+		if ( 0 === $current_iteration % 50 ) {
+			$this->stop_the_insanity();
+		}
+	}
+}

classes/ActionScheduler_WPCLI_Scheduler_command.php

@@ -0,0 +1,145 @@
+<?php
+
+/**
+ * Commands for the Action Scheduler by Prospress.
+ */
+class ActionScheduler_WPCLI_Scheduler_command extends WP_CLI_Command {
+
+	/**
+	 * Run the Action Scheduler
+	 *
+	 * ## OPTIONS
+	 *
+	 * [--batch-size=<size>]
+	 * : The maximum number of actions to run. Defaults to 100.
+	 *
+	 * [--batches=<size>]
+	 * : Limit execution to a number of batches. Defaults to 0, meaning batches will continue being executed until all actions are complete.
+	 *
+	 * [--cleanup-batch-size=<size>]
+	 * : The maximum number of actions to clean up. Defaults to the value of --batch-size.
+	 *
+	 * [--hooks=<hooks>]
+	 * : Only run actions with the specified hook. Omitting this option runs actions with any hook. Define multiple hooks as a comma separated string (without spaces), e.g. `--hooks=hook_one,hook_two,hook_three`
+	 *
+	 * [--group=<group>]
+	 * : Only run actions from the specified group. Omitting this option runs actions from all groups.
+	 *
+	 * [--force]
+	 * : Whether to force execution despite the maximum number of concurrent processes being exceeded.
+	 *
+	 * @param array $args Positional arguments.
+	 * @param array $assoc_args Keyed arguments.
+	 * @throws \WP_CLI\ExitException When an error occurs.
+	 */
+	public function run( $args, $assoc_args ) {
+		// Handle passed arguments.
+		$batch   = absint( \WP_CLI\Utils\get_flag_value( $assoc_args, 'batch-size', 100 ) );
+		$batches = absint( \WP_CLI\Utils\get_flag_value( $assoc_args, 'batches', 0 ) );
+		$clean   = absint( \WP_CLI\Utils\get_flag_value( $assoc_args, 'cleanup-batch-size', $batch ) );
+		$hooks   = explode( ',', WP_CLI\Utils\get_flag_value( $assoc_args, 'hooks', '' ) );
+		$hooks   = array_filter( array_map( 'trim', $hooks ) );
+		$group   = \WP_CLI\Utils\get_flag_value( $assoc_args, 'group', '' );
+		$force   = \WP_CLI\Utils\get_flag_value( $assoc_args, 'force', false );
+
+		$batches_completed = 0;
+		$actions_completed = 0;
+		$unlimited         = $batches === 0;
+
+		try {
+			// Custom queue cleaner instance.
+			$cleaner = new ActionScheduler_QueueCleaner( null, $clean );
+
+			// Get the queue runner instance
+			$runner = new ActionScheduler_WPCLI_QueueRunner( null, null, $cleaner );
+
+			// Determine how many tasks will be run in the first batch.
+			$total = $runner->setup( $batch, $hooks, $group, $force );
+
+			// Run actions for as long as possible.
+			while ( $total > 0 ) {
+				$this->print_total_actions( $total );
+				$actions_completed += $runner->run();
+				$batches_completed++;
+
+				// Maybe set up tasks for the next batch.
+				$total = ( $unlimited || $batches_completed < $batches ) ? $runner->setup( $batch, $hooks, $group, $force ) : 0;
+			}
+		} catch ( Exception $e ) {
+			$this->print_error( $e );
+		}
+
+		$this->print_total_batches( $batches_completed );
+		$this->print_success( $actions_completed );
+	}
+
+	/**
+	 * Print WP CLI message about how many actions are about to be processed.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param int $total
+	 */
+	protected function print_total_actions( $total ) {
+		WP_CLI::log(
+			sprintf(
+				/* translators: %d refers to how many scheduled taks were found to run */
+				_n( 'Found %d scheduled task', 'Found %d scheduled tasks', $total, 'action-scheduler' ),
+				number_format_i18n( $total )
+			)
+		);
+	}
+
+	/**
+	 * Print WP CLI message about how many batches of actions were processed.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param int $batches_completed
+	 */
+	protected function print_total_batches( $batches_completed ) {
+		WP_CLI::log(
+			sprintf(
+				/* translators: %d refers to the total number of batches executed */
+				_n( '%d batch executed.', '%d batches executed.', $batches_completed, 'action-scheduler' ),
+				number_format_i18n( $batches_completed )
+			)
+		);
+	}
+
+	/**
+	 * Convert an exception into a WP CLI error.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param Exception $e The error object.
+	 *
+	 * @throws \WP_CLI\ExitException
+	 */
+	protected function print_error( Exception $e ) {
+		WP_CLI::error(
+			sprintf(
+				/* translators: %s refers to the exception error message. */
+				__( 'There was an error running the action scheduler: %s', 'action-scheduler' ),
+				$e->getMessage()
+			)
+		);
+	}
+
+	/**
+	 * Print a success message with the number of completed actions.
+	 *
+	 * @author Jeremy Pry
+	 *
+	 * @param int $actions_completed
+	 */
+	protected function print_success( $actions_completed ) {
+		WP_CLI::success(
+			sprintf(
+				/* translators: %d refers to the total number of taskes completed */
+				_n( '%d scheduled task completed.', '%d scheduled tasks completed.', $actions_completed, 'action-scheduler' ),
+				number_format_i18n( $actions_completed )
+			)
+		);
+	}
+}

classes/ActionScheduler_wcSystemStatus.php

@@ -0,0 +1,129 @@
+<?php
+
+/**
+ * Class ActionScheduler_wcSystemStatus
+ */
+class ActionScheduler_wcSystemStatus {
+
+	/**
+	 * The active data stores
+	 *
+	 * @var ActionScheduler_Store
+	 */
+	protected $store;
+
+	function __construct( $store ) {
+		$this->store = $store;
+	}
+
+	/**
+	 * Display action data, including number of actions grouped by status and the oldest & newest action in each status.
+	 *
+	 * Helpful to identify issues, like a clogged queue.
+	 */
+	public function print() {
+		$action_counts     = $this->store->action_counts();
+		$status_labels     = $this->store->get_status_labels();
+		$oldest_and_newest = $this->get_oldest_and_newest( array_keys( $status_labels ) );
+
+		$this->get_template( $status_labels, $action_counts, $oldest_and_newest );
+	}
+
+	/**
+	 * Get oldest and newest scheduled dates for a given set of statuses.
+	 *
+	 * @param array $status_keys Set of statuses to find oldest & newest action for.
+	 * @return array
+	 */
+	protected function get_oldest_and_newest( $status_keys ) {
+
+		$oldest_and_newest = array();
+
+		foreach ( $status_keys as $status ) {
+			$oldest_and_newest[ $status ] = array(
+				'oldest' => '&ndash;',
+				'newest' => '&ndash;',
+			);
+
+			if ( 'in-progress' === $status ) {
+				continue;
+			}
+
+			$oldest_and_newest[ $status ]['oldest'] = $this->get_action_status_date( $status, 'oldest' );
+			$oldest_and_newest[ $status ]['newest'] = $this->get_action_status_date( $status, 'newest' );
+		}
+
+		return $oldest_and_newest;
+	}
+
+	/**
+	 * Get oldest or newest scheduled date for a given status.
+	 *
+	 * @param string $status Action status label/name string.
+	 * @param string $date_type Oldest or Newest.
+	 * @return DateTime
+	 */
+	protected function get_action_status_date( $status, $date_type = 'oldest' ) {
+
+		$order = 'oldest' === $date_type ? 'ASC' : 'DESC';
+
+		$action = $this->store->query_actions( array(
+			'claimed'  => false,
+			'status'   => $status,
+			'per_page' => 1,
+			'order'    => $order,
+		) );
+
+		if ( ! empty( $action ) ) {
+			$date_object = $this->store->get_date( $action[0] );
+			$action_date = $date_object->format( 'Y-m-d H:i:s O' );
+		} else {
+			$action_date = '&ndash;';
+		}
+
+		return $action_date;
+	}
+
+	/**
+	 * Get oldest or newest scheduled date for a given status.
+	 *
+	 * @param array $status_labels Set of statuses to find oldest & newest action for.
+	 * @param array $action_counts Number of actions grouped by status.
+	 * @param array $oldest_and_newest Date of the oldest and newest action with each status.
+	 */
+	protected function get_template( $status_labels, $action_counts, $oldest_and_newest ) {
+		?>
+
+		<table class="wc_status_table widefat" cellspacing="0">
+			<thead>
+				<tr>
+					<th colspan="5" data-export-label="Action Scheduler"><h2><?php esc_html_e( 'Action Scheduler', 'action-scheduler' ); ?><?php echo wc_help_tip( esc_html__( 'This section shows scheduled action counts.', 'action-scheduler' ) ); ?></h2></th>
+				</tr>
+				<tr>
+					<td><strong><?php esc_html_e( 'Action Status', 'action-scheduler' ); ?></strong></td>
+					<td class="help">&nbsp;</td>
+					<td><strong><?php esc_html_e( 'Count', 'action-scheduler' ); ?></strong></td>
+					<td><strong><?php esc_html_e( 'Oldest Scheduled Date', 'action-scheduler' ); ?></strong></td>
+					<td><strong><?php esc_html_e( 'Newest Scheduled Date', 'action-scheduler' ); ?></strong></td>
+				</tr>
+			</thead>
+			<tbody>
+				<?php
+				foreach ( $action_counts as $status => $count ) {
+					// WC uses the 3rd column for export, so we need to display more data in that (hidden when viewed as part of the table) and add an empty 2nd column.
+					printf(
+						'<tr><td>%1$s</td><td>&nbsp;</td><td>%2$s<span style="display: none;">, Oldest: %3$s, Newest: %4$s</span></td><td>%3$s</td><td>%4$s</td></tr>',
+						esc_html( $status_labels[ $status ] ),
+						number_format_i18n( $count ),
+						$oldest_and_newest[ $status ]['oldest'],
+						$oldest_and_newest[ $status ]['newest']
+					);
+				}
+				?>
+			</tbody>
+		</table>
+
+		<?php
+	}
+
+}

classes/ActionScheduler_wpCommentLogger.php

@@ -0,0 +1,240 @@
+<?php
+
+/**
+ * Class ActionScheduler_wpCommentLogger
+ */
+class ActionScheduler_wpCommentLogger extends ActionScheduler_Logger {
+	const AGENT = 'ActionScheduler';
+	const TYPE = 'action_log';
+
+	/**
+	 * @param string $action_id
+	 * @param string $message
+	 * @param DateTime $date
+	 *
+	 * @return string The log entry ID
+	 */
+	public function log( $action_id, $message, DateTime $date = NULL ) {
+		if ( empty($date) ) {
+			$date = as_get_datetime_object();
+		} else {
+			$date = as_get_datetime_object( clone $date );
+		}
+		$comment_id = $this->create_wp_comment( $action_id, $message, $date );
+		return $comment_id;
+	}
+
+	protected function create_wp_comment( $action_id, $message, DateTime $date ) {
+
+		$comment_date_gmt = $date->format('Y-m-d H:i:s');
+		ActionScheduler_TimezoneHelper::set_local_timezone( $date );
+		$comment_data = array(
+			'comment_post_ID' => $action_id,
+			'comment_date' => $date->format('Y-m-d H:i:s'),
+			'comment_date_gmt' => $comment_date_gmt,
+			'comment_author' => self::AGENT,
+			'comment_content' => $message,
+			'comment_agent' => self::AGENT,
+			'comment_type' => self::TYPE,
+		);
+		return wp_insert_comment($comment_data);
+	}
+
+	/**
+	 * @param string $entry_id
+	 *
+	 * @return ActionScheduler_LogEntry
+	 */
+	public function get_entry( $entry_id ) {
+		$comment = $this->get_comment( $entry_id );
+		if ( empty($comment) || $comment->comment_type != self::TYPE ) {
+			return new ActionScheduler_NullLogEntry();
+		}
+
+		$date = as_get_datetime_object( $comment->comment_date_gmt );
+		ActionScheduler_TimezoneHelper::set_local_timezone( $date );
+		return new ActionScheduler_LogEntry( $comment->comment_post_ID, $comment->comment_content, $date );
+	}
+
+	/**
+	 * @param string $action_id
+	 *
+	 * @return ActionScheduler_LogEntry[]
+	 */
+	public function get_logs( $action_id ) {
+		$status = 'all';
+		if ( get_post_status($action_id) == 'trash' ) {
+			$status = 'post-trashed';
+		}
+		$comments = get_comments(array(
+			'post_id' => $action_id,
+			'orderby' => 'comment_date_gmt',
+			'order' => 'ASC',
+			'type' => self::TYPE,
+			'status' => $status,
+		));
+		$logs = array();
+		foreach ( $comments as $c ) {
+			$entry = $this->get_entry( $c );
+			if ( !empty($entry) ) {
+				$logs[] = $entry;
+			}
+		}
+		return $logs;
+	}
+
+	protected function get_comment( $comment_id ) {
+		return get_comment( $comment_id );
+	}
+
+
+
+	/**
+	 * @param WP_Comment_Query $query
+	 */
+	public function filter_comment_queries( $query ) {
+		foreach ( array('ID', 'parent', 'post_author', 'post_name', 'post_parent', 'type', 'post_type', 'post_id', 'post_ID') as $key ) {
+			if ( !empty($query->query_vars[$key]) ) {
+				return; // don't slow down queries that wouldn't include action_log comments anyway
+			}
+		}
+		$query->query_vars['action_log_filter'] = TRUE;
+		add_filter( 'comments_clauses', array( $this, 'filter_comment_query_clauses' ), 10, 2 );
+	}
+
+	/**
+	 * @param array $clauses
+	 * @param WP_Comment_Query $query
+	 *
+	 * @return array
+	 */
+	public function filter_comment_query_clauses( $clauses, $query ) {
+		if ( !empty($query->query_vars['action_log_filter']) ) {
+			$clauses['where'] .= $this->get_where_clause();
+		}
+		return $clauses;
+	}
+
+	/**
+	 * Make sure Action Scheduler logs are excluded from comment feeds, which use WP_Query, not
+	 * the WP_Comment_Query class handled by @see self::filter_comment_queries().
+	 *
+	 * @param string $where
+	 * @param WP_Query $query
+	 *
+	 * @return string
+	 */
+	public function filter_comment_feed( $where, $query ) {
+		if ( is_comment_feed() ) {
+			$where .= $this->get_where_clause();
+		}
+		return $where;
+	}
+
+	/**
+	 * Return a SQL clause to exclude Action Scheduler comments.
+	 *
+	 * @return string
+	 */
+	protected function get_where_clause() {
+		global $wpdb;
+		return sprintf( " AND {$wpdb->comments}.comment_type != '%s'", self::TYPE );
+	}
+
+	/**
+	 * Remove action log entries from wp_count_comments()
+	 *
+	 * @param array $stats
+	 * @param int $post_id
+	 *
+	 * @return object
+	 */
+	public function filter_comment_count( $stats, $post_id ) {
+		global $wpdb;
+
+		if ( 0 === $post_id ) {
+			$stats = $this->get_comment_count();
+		}
+
+		return $stats;
+	}
+
+	/**
+	 * Retrieve the comment counts from our cache, or the database if the cached version isn't set.
+	 *
+	 * @return object
+	 */
+	protected function get_comment_count() {
+		global $wpdb;
+
+		$stats = get_transient( 'as_comment_count' );
+
+		if ( ! $stats ) {
+			$stats = array();
+
+			$count = $wpdb->get_results( "SELECT comment_approved, COUNT( * ) AS num_comments FROM {$wpdb->comments} WHERE comment_type NOT IN('order_note','action_log') GROUP BY comment_approved", ARRAY_A );
+
+			$total = 0;
+			$stats = array();
+			$approved = array( '0' => 'moderated', '1' => 'approved', 'spam' => 'spam', 'trash' => 'trash', 'post-trashed' => 'post-trashed' );
+
+			foreach ( (array) $count as $row ) {
+				// Don't count post-trashed toward totals
+				if ( 'post-trashed' != $row['comment_approved'] && 'trash' != $row['comment_approved'] ) {
+					$total += $row['num_comments'];
+				}
+				if ( isset( $approved[ $row['comment_approved'] ] ) ) {
+					$stats[ $approved[ $row['comment_approved'] ] ] = $row['num_comments'];
+				}
+			}
+
+			$stats['total_comments'] = $total;
+			$stats['all']            = $total;
+
+			foreach ( $approved as $key ) {
+				if ( empty( $stats[ $key ] ) ) {
+					$stats[ $key ] = 0;
+				}
+			}
+
+			$stats = (object) $stats;
+			set_transient( 'as_comment_count', $stats );
+		}
+
+		return $stats;
+	}
+
+	/**
+	 * Delete comment count cache whenever there is new comment or the status of a comment changes. Cache
+	 * will be regenerated next time ActionScheduler_wpCommentLogger::filter_comment_count() is called.
+	 */
+	public function delete_comment_count_cache() {
+		delete_transient( 'as_comment_count' );
+	}
+
+	/**
+	 * @codeCoverageIgnore
+	 */
+	public function init() {
+		add_action( 'action_scheduler_before_process_queue', array( $this, 'disable_comment_counting' ), 10, 0 );
+		add_action( 'action_scheduler_after_process_queue', array( $this, 'enable_comment_counting' ), 10, 0 );
+
+		parent::init();
+
+		add_action( 'pre_get_comments', array( $this, 'filter_comment_queries' ), 10, 1 );
+		add_action( 'wp_count_comments', array( $this, 'filter_comment_count' ), 20, 2 ); // run after WC_Comments::wp_count_comments() to make sure we exclude order notes and action logs
+		add_action( 'comment_feed_where', array( $this, 'filter_comment_feed' ), 10, 2 );
+
+		// Delete comments count cache whenever there is a new comment or a comment status changes
+		add_action( 'wp_insert_comment', array( $this, 'delete_comment_count_cache' ) );
+		add_action( 'wp_set_comment_status', array( $this, 'delete_comment_count_cache' ) );
+	}
+
+	public function disable_comment_counting() {
+		wp_defer_comment_counting(true);
+	}
+	public function enable_comment_counting() {
+		wp_defer_comment_counting(false);
+	}
+
+}

classes/ActionScheduler_wpPostStore.php

@@ -0,0 +1,807 @@
+<?php
+
+/**
+ * Class ActionScheduler_wpPostStore
+ */
+class ActionScheduler_wpPostStore extends ActionScheduler_Store {
+	const POST_TYPE = 'scheduled-action';
+	const GROUP_TAXONOMY = 'action-group';
+	const SCHEDULE_META_KEY = '_action_manager_schedule';
+
+	/** @var DateTimeZone */
+	protected $local_timezone = NULL;
+
+	/** @var int */
+	private static $max_index_length = 191;
+
+	public function save_action( ActionScheduler_Action $action, DateTime $scheduled_date = NULL ){
+		try {
+			$this->validate_action( $action );
+			$post_array = $this->create_post_array( $action, $scheduled_date );
+			$post_id = $this->save_post_array( $post_array );
+			$this->save_post_schedule( $post_id, $action->get_schedule() );
+			$this->save_action_group( $post_id, $action->get_group() );
+			do_action( 'action_scheduler_stored_action', $post_id );
+			return $post_id;
+		} catch ( Exception $e ) {
+			throw new RuntimeException( sprintf( __('Error saving action: %s', 'action-scheduler'), $e->getMessage() ), 0 );
+		}
+	}
+
+	protected function create_post_array( ActionScheduler_Action $action, DateTime $scheduled_date = NULL ) {
+		$post = array(
+			'post_type' => self::POST_TYPE,
+			'post_title' => $action->get_hook(),
+			'post_content' => json_encode($action->get_args()),
+			'post_status' => ( $action->is_finished() ? 'publish' : 'pending' ),
+			'post_date_gmt' => $this->get_scheduled_date_string( $action, $scheduled_date ),
+			'post_date'     => $this->get_scheduled_date_string_local( $action, $scheduled_date ),
+		);
+		return $post;
+	}
+
+	protected function save_post_array( $post_array ) {
+		add_filter( 'wp_insert_post_data', array( $this, 'filter_insert_post_data' ), 10, 1 );
+		add_filter( 'pre_wp_unique_post_slug', array( $this, 'set_unique_post_slug' ), 10, 5 );
+		$post_id = wp_insert_post($post_array);
+		remove_filter( 'wp_insert_post_data', array( $this, 'filter_insert_post_data' ), 10 );
+		remove_filter( 'pre_wp_unique_post_slug', array( $this, 'set_unique_post_slug' ), 10 );
+
+		if ( is_wp_error($post_id) || empty($post_id) ) {
+			throw new RuntimeException(__('Unable to save action.', 'action-scheduler'));
+		}
+		return $post_id;
+	}
+
+	public function filter_insert_post_data( $postdata ) {
+		if ( $postdata['post_type'] == self::POST_TYPE ) {
+			$postdata['post_author'] = 0;
+			if ( $postdata['post_status'] == 'future' ) {
+				$postdata['post_status'] = 'publish';
+			}
+		}
+		return $postdata;
+	}
+
+	/**
+	 * Create a (probably unique) post name for scheduled actions in a more performant manner than wp_unique_post_slug().
+	 *
+	 * When an action's post status is transitioned to something other than 'draft', 'pending' or 'auto-draft, like 'publish'
+	 * or 'failed' or 'trash', WordPress will find a unique slug (stored in post_name column) using the wp_unique_post_slug()
+	 * function. This is done to ensure URL uniqueness. The approach taken by wp_unique_post_slug() is to iterate over existing
+	 * post_name values that match, and append a number 1 greater than the largest. This makes sense when manually creating a
+	 * post from the Edit Post screen. It becomes a bottleneck when automatically processing thousands of actions, with a
+	 * database containing thousands of related post_name values.
+	 *
+	 * WordPress 5.1 introduces the 'pre_wp_unique_post_slug' filter for plugins to address this issue.
+	 *
+	 * We can short-circuit WordPress's wp_unique_post_slug() approach using the 'pre_wp_unique_post_slug' filter. This
+	 * method is available to be used as a callback on that filter. It provides a more scalable approach to generating a
+	 * post_name/slug that is probably unique. Because Action Scheduler never actually uses the post_name field, or an
+	 * action's slug, being probably unique is good enough.
+	 *
+	 * For more backstory on this issue, see:
+	 * - https://github.com/Prospress/action-scheduler/issues/44 and
+	 * - https://core.trac.wordpress.org/ticket/21112
+	 *
+	 * @param string $override_slug Short-circuit return value.
+	 * @param string $slug          The desired slug (post_name).
+	 * @param int    $post_ID       Post ID.
+	 * @param string $post_status   The post status.
+	 * @param string $post_type     Post type.
+	 * @return string
+	 */
+	public function set_unique_post_slug( $override_slug, $slug, $post_ID, $post_status, $post_type ) {
+		if ( self::POST_TYPE == $post_type ) {
+			$override_slug = uniqid( self::POST_TYPE . '-', true ) . '-' . wp_generate_password( 32, false );
+		}
+		return $override_slug;
+	}
+
+	protected function save_post_schedule( $post_id, $schedule ) {
+		update_post_meta( $post_id, self::SCHEDULE_META_KEY, $schedule );
+	}
+
+	protected function save_action_group( $post_id, $group ) {
+		if ( empty($group) ) {
+			wp_set_object_terms( $post_id, array(), self::GROUP_TAXONOMY, FALSE );
+		} else {
+			wp_set_object_terms( $post_id, array($group), self::GROUP_TAXONOMY, FALSE );
+		}
+	}
+
+	public function fetch_action( $action_id ) {
+		$post = $this->get_post( $action_id );
+		if ( empty($post) || $post->post_type != self::POST_TYPE ) {
+			return $this->get_null_action();
+		}
+		return $this->make_action_from_post($post);
+	}
+
+	protected function get_post( $action_id ) {
+		if ( empty($action_id) ) {
+			return NULL;
+		}
+		return get_post($action_id);
+	}
+
+	protected function get_null_action() {
+		return new ActionScheduler_NullAction();
+	}
+
+	protected function make_action_from_post( $post ) {
+		$hook = $post->post_title;
+		$args = json_decode( $post->post_content, true );
+		$this->validate_args( $args, $post->ID );
+
+		$schedule = get_post_meta( $post->ID, self::SCHEDULE_META_KEY, true );
+		if ( empty( $schedule ) || ! is_a( $schedule, 'ActionScheduler_Schedule' ) ) {
+			$schedule = new ActionScheduler_NullSchedule();
+		}
+		$group = wp_get_object_terms( $post->ID, self::GROUP_TAXONOMY, array('fields' => 'names') );
+		$group = empty( $group ) ? '' : reset($group);
+
+		return ActionScheduler::factory()->get_stored_action( $this->get_action_status_by_post_status( $post->post_status ), $hook, $args, $schedule, $group );
+	}
+
+	/**
+	 * @param string $post_status
+	 *
+	 * @throws InvalidArgumentException if $post_status not in known status fields returned by $this->get_status_labels()
+	 * @return string
+	 */
+	protected function get_action_status_by_post_status( $post_status ) {
+
+		switch ( $post_status ) {
+			case 'publish' :
+				$action_status = self::STATUS_COMPLETE;
+				break;
+			case 'trash' :
+				$action_status = self::STATUS_CANCELED;
+				break;
+			default :
+				if ( ! array_key_exists( $post_status, $this->get_status_labels() ) ) {
+					throw new InvalidArgumentException( sprintf( 'Invalid post status: "%s". No matching action status available.', $post_status ) );
+				}
+				$action_status = $post_status;
+				break;
+		}
+
+		return $action_status;
+	}
+
+	/**
+	 * @param string $action_status
+	 * @throws InvalidArgumentException if $post_status not in known status fields returned by $this->get_status_labels()
+	 * @return string
+	 */
+	protected function get_post_status_by_action_status( $action_status ) {
+
+		switch ( $action_status ) {
+			case self::STATUS_COMPLETE :
+				$post_status = 'publish';
+				break;
+			case self::STATUS_CANCELED :
+				$post_status = 'trash';
+				break;
+			default :
+				if ( ! array_key_exists( $action_status, $this->get_status_labels() ) ) {
+					throw new InvalidArgumentException( sprintf( 'Invalid action status: "%s".', $action_status ) );
+				}
+				$post_status = $action_status;
+				break;
+		}
+
+		return $post_status;
+	}
+
+	/**
+	 * @param string $hook
+	 * @param array $params
+	 *
+	 * @return string ID of the next action matching the criteria or NULL if not found
+	 */
+	public function find_action( $hook, $params = array() ) {
+		$params = wp_parse_args( $params, array(
+			'args' => NULL,
+			'status' => ActionScheduler_Store::STATUS_PENDING,
+			'group' => '',
+		));
+		/** @var wpdb $wpdb */
+		global $wpdb;
+		$query = "SELECT p.ID FROM {$wpdb->posts} p";
+		$args = array();
+		if ( !empty($params['group']) ) {
+			$query .= " INNER JOIN {$wpdb->term_relationships} tr ON tr.object_id=p.ID";
+			$query .= " INNER JOIN {$wpdb->term_taxonomy} tt ON tr.term_taxonomy_id=tt.term_taxonomy_id";
+			$query .= " INNER JOIN {$wpdb->terms} t ON tt.term_id=t.term_id AND t.slug=%s";
+			$args[] = $params['group'];
+		}
+		$query .= " WHERE p.post_title=%s";
+		$args[] = $hook;
+		$query .= " AND p.post_type=%s";
+		$args[] = self::POST_TYPE;
+		if ( !is_null($params['args']) ) {
+			$query .= " AND p.post_content=%s";
+			$args[] = json_encode($params['args']);
+		}
+
+		if ( ! empty( $params['status'] ) ) {
+			$query .= " AND p.post_status=%s";
+			$args[] = $this->get_post_status_by_action_status( $params['status'] );
+		}
+
+		switch ( $params['status'] ) {
+			case self::STATUS_COMPLETE:
+			case self::STATUS_RUNNING:
+			case self::STATUS_FAILED:
+				$order = 'DESC'; // Find the most recent action that matches
+				break;
+			case self::STATUS_PENDING:
+			default:
+				$order = 'ASC'; // Find the next action that matches
+				break;
+		}
+		$query .= " ORDER BY post_date_gmt $order LIMIT 1";
+
+		$query = $wpdb->prepare( $query, $args );
+
+		$id = $wpdb->get_var($query);
+		return $id;
+	}
+
+	/**
+	 * Returns the SQL statement to query (or count) actions.
+	 *
+	 * @param array $query Filtering options
+	 * @param string $select_or_count  Whether the SQL should select and return the IDs or just the row count
+	 * @throws InvalidArgumentException if $select_or_count not count or select
+	 * @return string SQL statement. The returned SQL is already properly escaped.
+	 */
+	protected function get_query_actions_sql( array $query, $select_or_count = 'select' ) {
+
+		if ( ! in_array( $select_or_count, array( 'select', 'count' ) ) ) {
+			throw new InvalidArgumentException(__('Invalid schedule. Cannot save action.', 'action-scheduler'));
+		}
+
+		$query = wp_parse_args( $query, array(
+			'hook' => '',
+			'args' => NULL,
+			'date' => NULL,
+			'date_compare' => '<=',
+			'modified' => NULL,
+			'modified_compare' => '<=',
+			'group' => '',
+			'status' => '',
+			'claimed' => NULL,
+			'per_page' => 5,
+			'offset' => 0,
+			'orderby' => 'date',
+			'order' => 'ASC',
+			'search' => '',
+		) );
+
+		/** @var wpdb $wpdb */
+		global $wpdb;
+		$sql  = ( 'count' === $select_or_count ) ? 'SELECT count(p.ID)' : 'SELECT p.ID ';
+		$sql .= "FROM {$wpdb->posts} p";
+		$sql_params = array();
+		if ( ! empty( $query['group'] ) || 'group' === $query['orderby'] ) {
+			$sql .= " INNER JOIN {$wpdb->term_relationships} tr ON tr.object_id=p.ID";
+			$sql .= " INNER JOIN {$wpdb->term_taxonomy} tt ON tr.term_taxonomy_id=tt.term_taxonomy_id";
+			$sql .= " INNER JOIN {$wpdb->terms} t ON tt.term_id=t.term_id";
+
+			if ( ! empty( $query['group'] ) ) {
+				$sql .= " AND t.slug=%s";
+				$sql_params[] = $query['group'];
+			}
+		}
+		$sql .= " WHERE post_type=%s";
+		$sql_params[] = self::POST_TYPE;
+		if ( $query['hook'] ) {
+			$sql .= " AND p.post_title=%s";
+			$sql_params[] = $query['hook'];
+		}
+		if ( !is_null($query['args']) ) {
+			$sql .= " AND p.post_content=%s";
+			$sql_params[] = json_encode($query['args']);
+		}
+
+		if ( ! empty( $query['status'] ) ) {
+			$sql .= " AND p.post_status=%s";
+			$sql_params[] = $this->get_post_status_by_action_status( $query['status'] );
+		}
+
+		if ( $query['date'] instanceof DateTime ) {
+			$date = clone $query['date'];
+			$date->setTimezone( new DateTimeZone('UTC') );
+			$date_string = $date->format('Y-m-d H:i:s');
+			$comparator = $this->validate_sql_comparator($query['date_compare']);
+			$sql .= " AND p.post_date_gmt $comparator %s";
+			$sql_params[] = $date_string;
+		}
+
+		if ( $query['modified'] instanceof DateTime ) {
+			$modified = clone $query['modified'];
+			$modified->setTimezone( new DateTimeZone('UTC') );
+			$date_string = $modified->format('Y-m-d H:i:s');
+			$comparator = $this->validate_sql_comparator($query['modified_compare']);
+			$sql .= " AND p.post_modified_gmt $comparator %s";
+			$sql_params[] = $date_string;
+		}
+
+		if ( $query['claimed'] === TRUE ) {
+			$sql .= " AND p.post_password != ''";
+		} elseif ( $query['claimed'] === FALSE ) {
+			$sql .= " AND p.post_password = ''";
+		} elseif ( !is_null($query['claimed']) ) {
+			$sql .= " AND p.post_password = %s";
+			$sql_params[] = $query['claimed'];
+		}
+
+		if ( ! empty( $query['search'] ) ) {
+			$sql .= " AND (p.post_title LIKE %s OR p.post_content LIKE %s OR p.post_password LIKE %s)";
+			for( $i = 0; $i < 3; $i++ ) {
+				$sql_params[] = sprintf( '%%%s%%', $query['search'] );
+			}
+		}
+
+		if ( 'select' === $select_or_count ) {
+			switch ( $query['orderby'] ) {
+				case 'hook':
+					$orderby = 'p.post_title';
+					break;
+				case 'group':
+					$orderby = 't.name';
+					break;
+				case 'status':
+					$orderby = 'p.post_status';
+					break;
+				case 'modified':
+					$orderby = 'p.post_modified';
+					break;
+				case 'claim_id':
+					$orderby = 'p.post_password';
+					break;
+				case 'schedule':
+				case 'date':
+				default:
+					$orderby = 'p.post_date_gmt';
+					break;
+			}
+			if ( 'ASC' === strtoupper( $query['order'] ) ) {
+				$order = 'ASC';
+			} else {
+				$order = 'DESC';
+			}
+			$sql .= " ORDER BY $orderby $order";
+			if ( $query['per_page'] > 0 ) {
+				$sql .= " LIMIT %d, %d";
+				$sql_params[] = $query['offset'];
+				$sql_params[] = $query['per_page'];
+			}
+		}
+
+		return $wpdb->prepare( $sql, $sql_params );
+	}
+
+	/**
+	 * @param array $query
+	 * @param string $query_type Whether to select or count the results. Default, select.
+	 * @return string|array The IDs of actions matching the query
+	 */
+	public function query_actions( $query = array(), $query_type = 'select' ) {
+		/** @var wpdb $wpdb */
+		global $wpdb;
+
+		$sql = $this->get_query_actions_sql( $query, $query_type );
+
+		return ( 'count' === $query_type ) ? $wpdb->get_var( $sql ) : $wpdb->get_col( $sql );
+	}
+
+	/**
+	 * Get a count of all actions in the store, grouped by status
+	 *
+	 * @return array
+	 */
+	public function action_counts() {
+
+		$action_counts_by_status = array();
+		$action_stati_and_labels = $this->get_status_labels();
+		$posts_count_by_status   = (array) wp_count_posts( self::POST_TYPE, 'readable' );
+
+		foreach ( $posts_count_by_status as $post_status_name => $count ) {
+
+			try {
+				$action_status_name = $this->get_action_status_by_post_status( $post_status_name );
+			} catch ( Exception $e ) {
+				// Ignore any post statuses that aren't for actions
+				continue;
+			}
+			if ( array_key_exists( $action_status_name, $action_stati_and_labels ) ) {
+				$action_counts_by_status[ $action_status_name ] = $count;
+			}
+		}
+
+		return $action_counts_by_status;
+	}
+
+	/**
+	 * @param string $action_id
+	 *
+	 * @throws InvalidArgumentException
+	 */
+	public function cancel_action( $action_id ) {
+		$post = get_post($action_id);
+		if ( empty($post) || ($post->post_type != self::POST_TYPE) ) {
+			throw new InvalidArgumentException(sprintf(__('Unidentified action %s', 'action-scheduler'), $action_id));
+		}
+		do_action( 'action_scheduler_canceled_action', $action_id );
+		add_filter( 'pre_wp_unique_post_slug', array( $this, 'set_unique_post_slug' ), 10, 5 );
+		wp_trash_post($action_id);
+		remove_filter( 'pre_wp_unique_post_slug', array( $this, 'set_unique_post_slug' ), 10 );
+	}
+
+	public function delete_action( $action_id ) {
+		$post = get_post($action_id);
+		if ( empty($post) || ($post->post_type != self::POST_TYPE) ) {
+			throw new InvalidArgumentException(sprintf(__('Unidentified action %s', 'action-scheduler'), $action_id));
+		}
+		do_action( 'action_scheduler_deleted_action', $action_id );
+		wp_delete_post($action_id, TRUE);
+	}
+
+	/**
+	 * @param string $action_id
+	 *
+	 * @throws InvalidArgumentException
+	 * @return ActionScheduler_DateTime The date the action is schedule to run, or the date that it ran.
+	 */
+	public function get_date( $action_id ) {
+		$next = $this->get_date_gmt( $action_id );
+		return ActionScheduler_TimezoneHelper::set_local_timezone( $next );
+	}
+
+	/**
+	 * @param string $action_id
+	 *
+	 * @throws InvalidArgumentException
+	 * @return ActionScheduler_DateTime The date the action is schedule to run, or the date that it ran.
+	 */
+	public function get_date_gmt( $action_id ) {
+		$post = get_post($action_id);
+		if ( empty($post) || ($post->post_type != self::POST_TYPE) ) {
+			throw new InvalidArgumentException(sprintf(__('Unidentified action %s', 'action-scheduler'), $action_id));
+		}
+		if ( $post->post_status == 'publish' ) {
+			return as_get_datetime_object($post->post_modified_gmt);
+		} else {
+			return as_get_datetime_object($post->post_date_gmt);
+		}
+	}
+
+	/**
+	 * @param int      $max_actions
+	 * @param DateTime $before_date Jobs must be schedule before this date. Defaults to now.
+	 * @param array    $hooks       Claim only actions with a hook or hooks.
+	 * @param string   $group       Claim only actions in the given group.
+	 *
+	 * @return ActionScheduler_ActionClaim
+	 * @throws RuntimeException When there is an error staking a claim.
+	 * @throws InvalidArgumentException When the given group is not valid.
+	 */
+	public function stake_claim( $max_actions = 10, DateTime $before_date = null, $hooks = array(), $group = '' ) {
+		$claim_id = $this->generate_claim_id();
+		$this->claim_actions( $claim_id, $max_actions, $before_date, $hooks, $group );
+		$action_ids = $this->find_actions_by_claim_id( $claim_id );
+
+		return new ActionScheduler_ActionClaim( $claim_id, $action_ids );
+	}
+
+	/**
+	 * @return int
+	 */
+	public function get_claim_count(){
+		global $wpdb;
+
+		$sql = "SELECT COUNT(DISTINCT post_password) FROM {$wpdb->posts} WHERE post_password != '' AND post_type = %s AND post_status IN ('in-progress','pending')";
+		$sql = $wpdb->prepare( $sql, array( self::POST_TYPE ) );
+
+		return $wpdb->get_var( $sql );
+	}
+
+	protected function generate_claim_id() {
+		$claim_id = md5(microtime(true) . rand(0,1000));
+		return substr($claim_id, 0, 20); // to fit in db field with 20 char limit
+	}
+
+	/**
+	 * @param string   $claim_id
+	 * @param int      $limit
+	 * @param DateTime $before_date Should use UTC timezone.
+	 * @param array    $hooks       Claim only actions with a hook or hooks.
+	 * @param string   $group       Claim only actions in the given group.
+	 *
+	 * @return int The number of actions that were claimed
+	 * @throws RuntimeException When there is a database error.
+	 * @throws InvalidArgumentException When the group is invalid.
+	 */
+	protected function claim_actions( $claim_id, $limit, DateTime $before_date = null, $hooks = array(), $group = '' ) {
+		// Set up initial variables.
+		$date      = null === $before_date ? as_get_datetime_object() : clone $before_date;
+		$limit_ids = ! empty( $group );
+		$ids       = $limit_ids ? $this->get_actions_by_group( $group, $limit, $date ) : array();
+
+		// If limiting by IDs and no posts found, then return early since we have nothing to update.
+		if ( $limit_ids && 0 === count( $ids ) ) {
+			return 0;
+		}
+
+		/** @var wpdb $wpdb */
+		global $wpdb;
+
+		/*
+		 * Build up custom query to update the affected posts. Parameters are built as a separate array
+		 * to make it easier to identify where they are in the query.
+		 *
+		 * We can't use $wpdb->update() here because of the "ID IN ..." clause.
+		 */
+		$update = "UPDATE {$wpdb->posts} SET post_password = %s, post_modified_gmt = %s, post_modified = %s";
+		$params = array(
+			$claim_id,
+			current_time( 'mysql', true ),
+			current_time( 'mysql' ),
+		);
+
+		// Build initial WHERE clause.
+		$where    = "WHERE post_type = %s AND post_status = %s AND post_password = ''";
+		$params[] = self::POST_TYPE;
+		$params[] = ActionScheduler_Store::STATUS_PENDING;
+
+		if ( ! empty( $hooks ) ) {
+			$placeholders = array_fill( 0, count( $hooks ), '%s' );
+			$where       .= ' AND post_title IN (' . join( ', ', $placeholders ) . ')';
+			$params       = array_merge( $params, array_values( $hooks ) );
+		}
+
+		/*
+		 * Add the IDs to the WHERE clause. IDs not escaped because they came directly from a prior DB query.
+		 *
+		 * If we're not limiting by IDs, then include the post_date_gmt clause.
+		 */
+		if ( $limit_ids ) {
+			$where .= ' AND ID IN (' . join( ',', $ids ) . ')';
+		} else {
+			$where .= ' AND post_date_gmt <= %s';
+			$params[] = $date->format( 'Y-m-d H:i:s' );
+		}
+
+		// Add the ORDER BY clause and,ms limit.
+		$order    = 'ORDER BY menu_order ASC, post_date_gmt ASC, ID ASC LIMIT %d';
+		$params[] = $limit;
+
+		// Run the query and gather results.
+		$rows_affected = $wpdb->query( $wpdb->prepare( "{$update} {$where} {$order}", $params ) );
+		if ( $rows_affected === false ) {
+			throw new RuntimeException( __( 'Unable to claim actions. Database error.', 'action-scheduler' ) );
+		}
+
+		return (int) $rows_affected;
+	}
+
+	/**
+	 * Get IDs of actions within a certain group and up to a certain date/time.
+	 *
+	 * @param string   $group The group to use in finding actions.
+	 * @param int      $limit The number of actions to retrieve.
+	 * @param DateTime $date  DateTime object representing cutoff time for actions. Actions retrieved will be
+	 *                        up to and including this DateTime.
+	 *
+	 * @return array IDs of actions in the appropriate group and before the appropriate time.
+	 * @throws InvalidArgumentException When the group does not exist.
+	 */
+	protected function get_actions_by_group( $group, $limit, DateTime $date ) {
+		// Ensure the group exists before continuing.
+		if ( ! term_exists( $group, self::GROUP_TAXONOMY )) {
+			throw new InvalidArgumentException( sprintf( __( 'The group "%s" does not exist.', 'action-scheduler' ), $group ) );
+		}
+
+		// Set up a query for post IDs to use later.
+		$query      = new WP_Query();
+		$query_args = array(
+			'fields'           => 'ids',
+			'post_type'        => self::POST_TYPE,
+			'post_status'      => ActionScheduler_Store::STATUS_PENDING,
+			'has_password'     => false,
+			'posts_per_page'   => $limit * 3,
+			'suppress_filters' => true,
+			'no_found_rows'    => true,
+			'orderby'          => array(
+				'menu_order' => 'ASC',
+				'date'       => 'ASC',
+				'ID'         => 'ASC',
+			),
+			'date_query'       => array(
+				'column' => 'post_date_gmt',
+				'before' => $date->format( 'Y-m-d H:i' ),
+				'inclusive' => true,
+			),
+			'tax_query' => array(
+				array(
+					'taxonomy'         => self::GROUP_TAXONOMY,
+					'field'            => 'slug',
+					'terms'            => $group,
+					'include_children' => false,
+				),
+			),
+		);
+
+		return $query->query( $query_args );
+	}
+
+	/**
+	 * @param string $claim_id
+	 * @return array
+	 */
+	public function find_actions_by_claim_id( $claim_id ) {
+		/** @var wpdb $wpdb */
+		global $wpdb;
+		$sql = "SELECT ID FROM {$wpdb->posts} WHERE post_type = %s AND post_password = %s";
+		$sql = $wpdb->prepare( $sql, array( self::POST_TYPE, $claim_id ) );
+		$action_ids = $wpdb->get_col( $sql );
+		return $action_ids;
+	}
+
+	public function release_claim( ActionScheduler_ActionClaim $claim ) {
+		$action_ids = $this->find_actions_by_claim_id( $claim->get_id() );
+		if ( empty($action_ids) ) {
+			return; // nothing to do
+		}
+		$action_id_string = implode(',', array_map('intval', $action_ids));
+		/** @var wpdb $wpdb */
+		global $wpdb;
+		$sql = "UPDATE {$wpdb->posts} SET post_password = '' WHERE ID IN ($action_id_string) AND post_password = %s";
+		$sql = $wpdb->prepare( $sql, array( $claim->get_id() ) );
+		$result = $wpdb->query($sql);
+		if ( $result === false ) {
+			throw new RuntimeException( sprintf( __('Unable to unlock claim %s. Database error.', 'action-scheduler'), $claim->get_id() ) );
+		}
+	}
+
+	/**
+	 * @param string $action_id
+	 */
+	public function unclaim_action( $action_id ) {
+		/** @var wpdb $wpdb */
+		global $wpdb;
+		$sql = "UPDATE {$wpdb->posts} SET post_password = '' WHERE ID = %d AND post_type = %s";
+		$sql = $wpdb->prepare( $sql, $action_id, self::POST_TYPE );
+		$result = $wpdb->query($sql);
+		if ( $result === false ) {
+			throw new RuntimeException( sprintf( __('Unable to unlock claim on action %s. Database error.', 'action-scheduler'), $action_id ) );
+		}
+	}
+
+	public function mark_failure( $action_id ) {
+		/** @var wpdb $wpdb */
+		global $wpdb;
+		$sql = "UPDATE {$wpdb->posts} SET post_status = %s WHERE ID = %d AND post_type = %s";
+		$sql = $wpdb->prepare( $sql, self::STATUS_FAILED, $action_id, self::POST_TYPE );
+		$result = $wpdb->query($sql);
+		if ( $result === false ) {
+			throw new RuntimeException( sprintf( __('Unable to mark failure on action %s. Database error.', 'action-scheduler'), $action_id ) );
+		}
+	}
+
+	/**
+	 * Return an action's claim ID, as stored in the post password column
+	 *
+	 * @param string $action_id
+	 * @return mixed
+	 */
+	public function get_claim_id( $action_id ) {
+		return $this->get_post_column( $action_id, 'post_password' );
+	}
+
+	/**
+	 * Return an action's status, as stored in the post status column
+	 *
+	 * @param string $action_id
+	 * @return mixed
+	 */
+	public function get_status( $action_id ) {
+		$status = $this->get_post_column( $action_id, 'post_status' );
+
+		if ( $status === null ) {
+			throw new InvalidArgumentException( __( 'Invalid action ID. No status found.', 'action-scheduler' ) );
+		}
+
+		return $this->get_action_status_by_post_status( $status );
+	}
+
+	private function get_post_column( $action_id, $column_name ) {
+		/** @var \wpdb $wpdb */
+		global $wpdb;
+		return $wpdb->get_var( $wpdb->prepare( "SELECT {$column_name} FROM {$wpdb->posts} WHERE ID=%d AND post_type=%s", $action_id, self::POST_TYPE ) );
+	}
+
+	/**
+	 * @param string $action_id
+	 */
+	public function log_execution( $action_id ) {
+		/** @var wpdb $wpdb */
+		global $wpdb;
+
+		$sql = "UPDATE {$wpdb->posts} SET menu_order = menu_order+1, post_status=%s, post_modified_gmt = %s, post_modified = %s WHERE ID = %d AND post_type = %s";
+		$sql = $wpdb->prepare( $sql, self::STATUS_RUNNING, current_time('mysql', true), current_time('mysql'), $action_id, self::POST_TYPE );
+		$wpdb->query($sql);
+	}
+
+
+	public function mark_complete( $action_id ) {
+		$post = get_post($action_id);
+		if ( empty($post) || ($post->post_type != self::POST_TYPE) ) {
+			throw new InvalidArgumentException(sprintf(__('Unidentified action %s', 'action-scheduler'), $action_id));
+		}
+		add_filter( 'wp_insert_post_data', array( $this, 'filter_insert_post_data' ), 10, 1 );
+		add_filter( 'pre_wp_unique_post_slug', array( $this, 'set_unique_post_slug' ), 10, 5 );
+		$result = wp_update_post(array(
+			'ID' => $action_id,
+			'post_status' => 'publish',
+		), TRUE);
+		remove_filter( 'wp_insert_post_data', array( $this, 'filter_insert_post_data' ), 10 );
+		remove_filter( 'pre_wp_unique_post_slug', array( $this, 'set_unique_post_slug' ), 10 );
+		if ( is_wp_error($result) ) {
+			throw new RuntimeException($result->get_error_message());
+		}
+	}
+
+	/**
+	 * InnoDB indexes have a maximum size of 767 bytes by default, which is only 191 characters with utf8mb4.
+	 *
+	 * Previously, AS wasn't concerned about args length, as we used the (unindex) post_content column. However,
+	 * as we prepare to move to custom tables, and can use an indexed VARCHAR column instead, we want to warn
+	 * developers of this impending requirement.
+	 *
+	 * @param ActionScheduler_Action $action
+	 */
+	protected function validate_action( ActionScheduler_Action $action ) {
+		if ( strlen( json_encode( $action->get_args() ) ) > self::$max_index_length ) {
+			_doing_it_wrong( 'ActionScheduler_Action::$args', sprintf( 'To ensure the action args column can be indexed, action args should not be more than %d characters when encoded as JSON. Support for strings longer than this will be removed in a future version.', self::$max_index_length ), '2.1.0' );
+		}
+	}
+
+	/**
+	 * @codeCoverageIgnore
+	 */
+	public function init() {
+		$post_type_registrar = new ActionScheduler_wpPostStore_PostTypeRegistrar();
+		$post_type_registrar->register();
+
+		$post_status_registrar = new ActionScheduler_wpPostStore_PostStatusRegistrar();
+		$post_status_registrar->register();
+
+		$taxonomy_registrar = new ActionScheduler_wpPostStore_TaxonomyRegistrar();
+		$taxonomy_registrar->register();
+	}
+
+	/**
+	 * Validate that we could decode action arguments.
+	 *
+	 * @param mixed $args      The decoded arguments.
+	 * @param int   $action_id The action ID.
+	 *
+	 * @throws ActionScheduler_InvalidActionException When the decoded arguments are invalid.
+	 */
+	private function validate_args( $args, $action_id ) {
+		// Ensure we have an array of args.
+		if ( ! is_array( $args ) ) {
+			throw ActionScheduler_InvalidActionException::from_decoding_args( $action_id );
+		}
+
+		// Validate JSON decoding if possible.
+		if ( function_exists( 'json_last_error' ) && JSON_ERROR_NONE !== json_last_error() ) {
+			throw ActionScheduler_InvalidActionException::from_decoding_args( $action_id );
+		}
+	}
+}

classes/ActionScheduler_wpPostStore_PostStatusRegistrar.php

@@ -0,0 +1,57 @@
+<?php
+
+/**
+ * Class ActionScheduler_wpPostStore_PostStatusRegistrar
+ * @codeCoverageIgnore
+ */
+class ActionScheduler_wpPostStore_PostStatusRegistrar {
+	public function register() {
+		register_post_status( ActionScheduler_Store::STATUS_RUNNING, array_merge( $this->post_status_args(), $this->post_status_running_labels() ) );
+		register_post_status( ActionScheduler_Store::STATUS_FAILED, array_merge( $this->post_status_args(), $this->post_status_failed_labels() ) );
+	}
+
+	/**
+	 * Build the args array for the post type definition
+	 *
+	 * @return array
+	 */
+	protected function post_status_args() {
+		$args = array(
+			'public'                    => false,
+			'exclude_from_search'       => false,
+			'show_in_admin_all_list'    => true,
+			'show_in_admin_status_list' => true,
+		);
+
+		return apply_filters( 'action_scheduler_post_status_args', $args );
+	}
+
+	/**
+	 * Build the args array for the post type definition
+	 *
+	 * @return array
+	 */
+	protected function post_status_failed_labels() {
+		$labels = array(
+			'label'       => _x( 'Failed', 'post' ),
+			'label_count' => _n_noop( 'Failed <span class="count">(%s)</span>', 'Failed <span class="count">(%s)</span>' ),
+		);
+
+		return apply_filters( 'action_scheduler_post_status_failed_labels', $labels );
+	}
+
+	/**
+	 * Build the args array for the post type definition
+	 *
+	 * @return array
+	 */
+	protected function post_status_running_labels() {
+		$labels = array(
+			'label'       => _x( 'In-Progress', 'post' ),
+			'label_count' => _n_noop( 'In-Progress <span class="count">(%s)</span>', 'In-Progress <span class="count">(%s)</span>' ),
+		);
+
+		return apply_filters( 'action_scheduler_post_status_running_labels', $labels );
+	}
+}
+ 

classes/ActionScheduler_wpPostStore_PostTypeRegistrar.php

@@ -0,0 +1,50 @@
+<?php
+
+/**
+ * Class ActionScheduler_wpPostStore_PostTypeRegistrar
+ * @codeCoverageIgnore
+ */
+class ActionScheduler_wpPostStore_PostTypeRegistrar {
+	public function register() {
+		register_post_type( ActionScheduler_wpPostStore::POST_TYPE, $this->post_type_args() );
+	}
+
+	/**
+	 * Build the args array for the post type definition
+	 *
+	 * @return array
+	 */
+	protected function post_type_args() {
+		$args = array(
+			'label' => __( 'Scheduled Actions', 'action-scheduler' ),
+			'description' => __( 'Scheduled actions are hooks triggered on a cetain date and time.', 'action-scheduler' ),
+			'public' => false,
+			'map_meta_cap' => true,
+			'hierarchical' => false,
+			'supports' => array('title', 'editor','comments'),
+			'rewrite' => false,
+			'query_var' => false,
+			'can_export' => true,
+			'ep_mask' => EP_NONE,
+			'labels' => array(
+				'name' => __( 'Scheduled Actions', 'action-scheduler' ),
+				'singular_name' => __( 'Scheduled Action', 'action-scheduler' ),
+				'menu_name' => _x( 'Scheduled Actions', 'Admin menu name', 'action-scheduler' ),
+				'add_new' => __( 'Add', 'action-scheduler' ),
+				'add_new_item' => __( 'Add New Scheduled Action', 'action-scheduler' ),
+				'edit' => __( 'Edit', 'action-scheduler' ),
+				'edit_item' => __( 'Edit Scheduled Action', 'action-scheduler' ),
+				'new_item' => __( 'New Scheduled Action', 'action-scheduler' ),
+				'view' => __( 'View Action', 'action-scheduler' ),
+				'view_item' => __( 'View Action', 'action-scheduler' ),
+				'search_items' => __( 'Search Scheduled Actions', 'action-scheduler' ),
+				'not_found' => __( 'No actions found', 'action-scheduler' ),
+				'not_found_in_trash' => __( 'No actions found in trash', 'action-scheduler' ),
+			),
+		);
+
+		$args = apply_filters('action_scheduler_post_type_args', $args);
+		return $args;
+	}
+}
+ 

classes/ActionScheduler_wpPostStore_TaxonomyRegistrar.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * Class ActionScheduler_wpPostStore_TaxonomyRegistrar
+ * @codeCoverageIgnore
+ */
+class ActionScheduler_wpPostStore_TaxonomyRegistrar {
+	public function register() {
+		register_taxonomy( ActionScheduler_wpPostStore::GROUP_TAXONOMY, ActionScheduler_wpPostStore::POST_TYPE, $this->taxonomy_args() );
+	}
+
+	protected function taxonomy_args() {
+		$args = array(
+			'label' => __('Action Group', 'action-scheduler'),
+			'public' => false,
+			'hierarchical' => false,
+			'show_admin_column' => true,
+			'query_var' => false,
+			'rewrite' => false,
+		);
+
+		$args = apply_filters('action_scheduler_taxonomy_args', $args);
+		return $args;
+	}
+}
+ 

codecov.yml

@@ -0,0 +1,13 @@
+codecov:
+  branch: master
+
+coverage:
+  ignore:
+  - tests/.*
+  - lib/.*
+  status:
+    project: false
+    patch: false
+    changes: false
+
+comment: false

composer.json

@@ -0,0 +1,11 @@
+{
+  "name": "prospress/action-scheduler",
+  "description": "Action Scheduler for WordPress and WooCommerce",
+  "type": "wordpress-plugin",
+  "license": "GPL-3.0",
+  "minimum-stability": "dev",
+  "require": {},
+  "require-dev": {
+    "wp-cli/wp-cli": "1.5.1"
+  }
+}

deprecated/ActionScheduler_Abstract_QueueRunner_Deprecated.php

@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * Abstract class with common Queue Cleaner functionality.
+ */
+abstract class ActionScheduler_Abstract_QueueRunner_Deprecated {
+
+	/**
+	 * Get the maximum number of seconds a batch can run for.
+	 *
+	 * @deprecated 2.1.1
+	 * @return int The number of seconds.
+	 */
+	protected function get_maximum_execution_time() {
+		_deprecated_function( __METHOD__, '2.1.1', 'ActionScheduler_Abstract_QueueRunner::get_time_limit()' );
+
+		$maximum_execution_time = 30;
+
+		// Apply deprecated filter
+		if ( has_filter( 'action_scheduler_maximum_execution_time' ) ) {
+			_deprecated_function( 'action_scheduler_maximum_execution_time', '2.1.1', 'action_scheduler_queue_runner_time_limit' );
+			$maximum_execution_time = apply_filters( 'action_scheduler_maximum_execution_time', $maximum_execution_time );
+		}
+
+		return absint( $maximum_execution_time );
+	}
+}

deprecated/ActionScheduler_AdminView_Deprecated.php

@@ -0,0 +1,147 @@
+<?php
+
+/**
+ * Class ActionScheduler_AdminView_Deprecated
+ *
+ * Store deprecated public functions previously found in the ActionScheduler_AdminView class.
+ * Keeps them out of the way of the main class.
+ *
+ * @codeCoverageIgnore
+ */
+class ActionScheduler_AdminView_Deprecated {
+
+	public function action_scheduler_post_type_args( $args ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+		return $args;
+	}
+
+	/**
+	 * Customise the post status related views displayed on the Scheduled Actions administration screen.
+	 *
+	 * @param array $views An associative array of views and view labels which can be used to filter the 'scheduled-action' posts displayed on the Scheduled Actions administration screen.
+	 * @return array $views An associative array of views and view labels which can be used to filter the 'scheduled-action' posts displayed on the Scheduled Actions administration screen.
+	 */
+	public function list_table_views( $views ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+		return $views;
+	}
+
+	/**
+	 * Do not include the "Edit" action for the Scheduled Actions administration screen.
+	 *
+	 * Hooked to the 'bulk_actions-edit-action-scheduler' filter.
+	 *
+	 * @param array $actions An associative array of actions which can be performed on the 'scheduled-action' post type.
+	 * @return array $actions An associative array of actions which can be performed on the 'scheduled-action' post type.
+	 */
+	public function bulk_actions( $actions ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+		return $actions;
+	}
+
+	/**
+	 * Completely customer the columns displayed on the Scheduled Actions administration screen.
+	 *
+	 * Because we can't filter the content of the default title and date columns, we need to recreate our own
+	 * custom columns for displaying those post fields. For the column content, @see self::list_table_column_content().
+	 *
+	 * @param array $columns An associative array of columns that are use for the table on the Scheduled Actions administration screen.
+	 * @return array $columns An associative array of columns that are use for the table on the Scheduled Actions administration screen.
+	 */
+	public function list_table_columns( $columns ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+		return $columns;
+	}
+
+	/**
+	 * Make our custom title & date columns use defaulting title & date sorting.
+	 *
+	 * @param array $columns An associative array of columns that can be used to sort the table on the Scheduled Actions administration screen.
+	 * @return array $columns An associative array of columns that can be used to sort the table on the Scheduled Actions administration screen.
+	 */
+	public static function list_table_sortable_columns( $columns ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+		return $columns;
+	}
+
+	/**
+	 * Print the content for our custom columns.
+	 *
+	 * @param string $column_name The key for the column for which we should output our content.
+	 * @param int $post_id The ID of the 'scheduled-action' post for which this row relates.
+	 */
+	public static function list_table_column_content( $column_name, $post_id ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+	}
+
+	/**
+	 * Hide the inline "Edit" action for all 'scheduled-action' posts.
+	 *
+	 * Hooked to the 'post_row_actions' filter.
+	 *
+	 * @param array $actions An associative array of actions which can be performed on the 'scheduled-action' post type.
+	 * @return array $actions An associative array of actions which can be performed on the 'scheduled-action' post type.
+	 */
+	public static function row_actions( $actions, $post ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+		return $actions;
+	}
+
+	/**
+	 * Run an action when triggered from the Action Scheduler administration screen.
+	 *
+	 * @codeCoverageIgnore
+	 */
+	public static function maybe_execute_action() {
+		_deprecated_function( __METHOD__, '2.0.0' );
+	}
+
+	/**
+	 * Convert an interval of seconds into a two part human friendly string.
+	 *
+	 * The WordPress human_time_diff() function only calculates the time difference to one degree, meaning
+	 * even if an action is 1 day and 11 hours away, it will display "1 day". This funciton goes one step
+	 * further to display two degrees of accuracy.
+	 *
+	 * Based on Crontrol::interval() function by Edward Dale: https://wordpress.org/plugins/wp-crontrol/
+	 *
+	 * @param int $interval A interval in seconds.
+	 * @return string A human friendly string representation of the interval.
+	 */
+	public static function admin_notices() {
+		_deprecated_function( __METHOD__, '2.0.0' );
+	}
+
+	/**
+	 * Filter search queries to allow searching by Claim ID (i.e. post_password).
+	 *
+	 * @param string $orderby MySQL orderby string.
+	 * @param WP_Query $query Instance of a WP_Query object
+	 * @return string MySQL orderby string.
+	 */
+	public function custom_orderby( $orderby, $query ){
+		_deprecated_function( __METHOD__, '2.0.0' );
+	}
+
+	/**
+	 * Filter search queries to allow searching by Claim ID (i.e. post_password).
+	 *
+	 * @param string $search MySQL search string.
+	 * @param WP_Query $query Instance of a WP_Query object
+	 * @return string MySQL search string.
+	 */
+	public function search_post_password( $search, $query ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+	}
+
+	/**
+	 * Change messages when a scheduled action is updated.
+	 *
+	 * @param  array $messages
+	 * @return array
+	 */
+	public function post_updated_messages( $messages ) {
+		_deprecated_function( __METHOD__, '2.0.0' );
+		return $messages;
+	}
+}

deprecated/functions.php

@@ -0,0 +1,126 @@
+<?php
+
+/**
+ * Deprecated API functions for scheduling actions
+ *
+ * Functions with the wc prefix were deprecated to avoid confusion with
+ * Action Scheduler being included in WooCommerce core, and it providing
+ * a different set of APIs for working with the action queue.
+ */
+
+/**
+ * Schedule an action to run one time
+ *
+ * @param int $timestamp When the job will run
+ * @param string $hook The hook to trigger
+ * @param array $args Arguments to pass when the hook triggers
+ * @param string $group The group to assign this job to
+ *
+ * @return string The job ID
+ */
+function wc_schedule_single_action( $timestamp, $hook, $args = array(), $group = '' ) {
+	_deprecated_function( __FUNCTION__, '2.1.0', 'as_schedule_single_action()' );
+	return as_schedule_single_action( $timestamp, $hook, $args, $group );
+}
+
+/**
+ * Schedule a recurring action
+ *
+ * @param int $timestamp When the first instance of the job will run
+ * @param int $interval_in_seconds How long to wait between runs
+ * @param string $hook The hook to trigger
+ * @param array $args Arguments to pass when the hook triggers
+ * @param string $group The group to assign this job to
+ *
+ * @deprecated 2.1.0
+ *
+ * @return string The job ID
+ */
+function wc_schedule_recurring_action( $timestamp, $interval_in_seconds, $hook, $args = array(), $group = '' ) {
+	_deprecated_function( __FUNCTION__, '2.1.0', 'as_schedule_recurring_action()' );
+	return as_schedule_recurring_action( $timestamp, $interval_in_seconds, $hook, $args, $group );
+}
+
+/**
+ * Schedule an action that recurs on a cron-like schedule.
+ *
+ * @param int $timestamp The schedule will start on or after this time
+ * @param string $schedule A cron-link schedule string
+ * @see http://en.wikipedia.org/wiki/Cron
+ *   *    *    *    *    *    *
+ *   ┬    ┬    ┬    ┬    ┬    ┬
+ *   |    |    |    |    |    |
+ *   |    |    |    |    |    + year [optional]
+ *   |    |    |    |    +----- day of week (0 - 7) (Sunday=0 or 7)
+ *   |    |    |    +---------- month (1 - 12)
+ *   |    |    +--------------- day of month (1 - 31)
+ *   |    +-------------------- hour (0 - 23)
+ *   +------------------------- min (0 - 59)
+ * @param string $hook The hook to trigger
+ * @param array $args Arguments to pass when the hook triggers
+ * @param string $group The group to assign this job to
+ *
+ * @deprecated 2.1.0
+ *
+ * @return string The job ID
+ */
+function wc_schedule_cron_action( $timestamp, $schedule, $hook, $args = array(), $group = '' ) {
+	_deprecated_function( __FUNCTION__, '2.1.0', 'as_schedule_cron_action()' );
+	return as_schedule_cron_action( $timestamp, $schedule, $hook, $args, $group );
+}
+
+/**
+ * Cancel the next occurrence of a job.
+ *
+ * @param string $hook The hook that the job will trigger
+ * @param array $args Args that would have been passed to the job
+ * @param string $group
+ *
+ * @deprecated 2.1.0
+ */
+function wc_unschedule_action( $hook, $args = array(), $group = '' ) {
+	_deprecated_function( __FUNCTION__, '2.1.0', 'as_unschedule_action()' );
+	as_unschedule_action( $hook, $args, $group );
+}
+
+/**
+ * @param string $hook
+ * @param array $args
+ * @param string $group
+ *
+ * @deprecated 2.1.0
+ *
+ * @return int|bool The timestamp for the next occurrence, or false if nothing was found
+ */
+function wc_next_scheduled_action( $hook, $args = NULL, $group = '' ) {
+	_deprecated_function( __FUNCTION__, '2.1.0', 'as_next_scheduled_action()' );
+	return as_next_scheduled_action( $hook, $args, $group );
+}
+
+/**
+ * Find scheduled actions
+ *
+ * @param array $args Possible arguments, with their default values:
+ *        'hook' => '' - the name of the action that will be triggered
+ *        'args' => NULL - the args array that will be passed with the action
+ *        'date' => NULL - the scheduled date of the action. Expects a DateTime object, a unix timestamp, or a string that can parsed with strtotime(). Used in UTC timezone.
+ *        'date_compare' => '<=' - operator for testing "date". accepted values are '!=', '>', '>=', '<', '<=', '='
+ *        'modified' => NULL - the date the action was last updated. Expects a DateTime object, a unix timestamp, or a string that can parsed with strtotime(). Used in UTC timezone.
+ *        'modified_compare' => '<=' - operator for testing "modified". accepted values are '!=', '>', '>=', '<', '<=', '='
+ *        'group' => '' - the group the action belongs to
+ *        'status' => '' - ActionScheduler_Store::STATUS_COMPLETE or ActionScheduler_Store::STATUS_PENDING
+ *        'claimed' => NULL - TRUE to find claimed actions, FALSE to find unclaimed actions, a string to find a specific claim ID
+ *        'per_page' => 5 - Number of results to return
+ *        'offset' => 0
+ *        'orderby' => 'date' - accepted values are 'hook', 'group', 'modified', or 'date'
+ *        'order' => 'ASC'
+ * @param string $return_format OBJECT, ARRAY_A, or ids
+ *
+ * @deprecated 2.1.0
+ *
+ * @return array
+ */
+function wc_get_scheduled_actions( $args = array(), $return_format = OBJECT ) {
+	_deprecated_function( __FUNCTION__, '2.1.0', 'as_get_scheduled_actions()' );
+	return as_get_scheduled_actions( $args, $return_format );
+}

docs/CNAME

@@ -0,0 +1 @@
+actionscheduler.org

docs/_config.yml

@@ -0,0 +1,7 @@
+title: Action Scheduler - Job Queue for WordPress
+description: A scalable, traceable job queue for background processing large queues of tasks in WordPress. Designed for distribution in WordPress plugins - no server access required.
+theme: jekyll-theme-hacker
+permalink: /:slug/
+plugins:
+  - jekyll-seo-tag
+  - jekyll-sitemap

docs/_layouts/default.html

@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<html lang="{{ site.lang | default: "en-US" }}">
+  <head>
+    <meta charset='utf-8'>
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <link rel="stylesheet" href="{{ '/assets/css/style.css?v=' | append: site.github.build_revision | relative_url }}">
+
+    <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
+    <link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
+    <link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
+    <link rel="manifest" href="/site.webmanifest">
+    <link rel="mask-icon" href="/safari-pinned-tab.svg" color="#63c0f5">
+    <meta name="msapplication-TileColor" content="#151515">
+    <meta name="theme-color" content="#ffffff">
+
+
+{% seo %}
+  </head>
+
+  <body>
+
+    <header>
+      <a class="github-corner" href="https://github.com/Prospress/action-scheduler/" aria-label="View on GitHub">
+        <svg width="80" height="80" viewBox="0 0 250 250" style="fill:#b5e853; color:#151513; position: fixed; top: 0; border: 0; right: 0;" aria-hidden="true">
+          <path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path>
+        </svg>
+      </a>
+      <div class="container">
+        <p><a href="/usage/">Usage</a> | <a href="/admin/">Admin</a> | <a href="/wp-cli/">WP-CLI</a> | <a href="/perf/">Background Processing at Scale</a> | <a href="/api/">API</a> | <a href="/faq/">FAQ</a>
+        <h1><a href="/">action-scheduler</a></h1>
+        <h2>A scalable, traceable job queue for background processing large queues of tasks in WordPress. Designed for distribution in WordPress plugins - no server access required.</h2>
+      </div>
+    </header>
+
+    <div class="container">
+      <section id="main_content">
+        {{ content }}
+      </section>
+    </div>
+
+    <footer>
+        <div class="container">
+            <p><a href="/usage/">Usage</a> | <a href="/admin/">Admin</a> | <a href="/wp-cli/">WP-CLI</a> | <a href="/perf/">Background Processing at Scale</a> | <a href="/api/">API</a> | <a href="/faq/">FAQ</a>
+            <p class="footer-image">
+                <a href="https://prospress.com"><img src="http://pic.pros.pr/eb8dcec9bd54/prospress-hacker-green-logo.png" width="120"></a>
+            </p>
+        </div>
+    </footer>
+
+    {% if site.google_analytics %}
+      <script>
+        (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+        (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+        m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+        })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+        ga('create', '{{ site.google_analytics }}', 'auto');
+        ga('send', 'pageview');
+      </script>
+    {% endif %}
+  </body>
+</html>

docs/admin.md

@@ -0,0 +1,22 @@
+---
+description: Learn how to administer background jobs with the Action Scheduler job queue for WordPress.
+---
+# Scheduled Actions Administration Screen
+
+Action Scheduler has a built in administration screen for monitoring, debugging and manually triggering scheduled actions.
+
+The administration interface is accesible through both:
+
+1. **Tools > Scheduled Actions**
+1. **WooCommerce > Status > Scheduled Actions**, when WooCommerce is installed.
+
+Among other tasks, from the admin screen you can:
+
+* run a pending action
+* view the scheduled actions with a specific status, like the all actions which have failed or are in-progress (https://cldup.com/NNTwE88Xl8.png).
+* view the log entries for a specific action to find out why it failed.
+* sort scheduled actions by hook name, scheduled date, claim ID or group name.
+
+Still have questions? Check out the [FAQ](/faq).
+
+![](https://cldup.com/5BA2BNB1sw.png)

docs/api.md

@@ -0,0 +1,179 @@
+---
+description: Reference guide for background processing functions provided by the Action Scheduler job queue for WordPress.
+---
+# API Reference
+
+Action Scheduler provides a range of functions for scheduling hooks to run at some time in the future on one or more occassions.
+
+To understand the scheduling functoins, it can help to think of them as extensions to WordPress' `do_action()` function that add the ability to delay and repeat when the hook will be triggered.
+
+## WP-Cron APIs vs. Action Scheduler APIs
+
+The Action Scheduler API functions are designed to mirror the WordPress [WP-Cron API functions](http://codex.wordpress.org/Category:WP-Cron_Functions).
+
+Functions return similar values and accept similar arguments to their WP-Cron counterparts. The notable differences are:
+
+* `as_schedule_single_action()` & `as_schedule_recurring_action()` will return the post ID of the scheduled action rather than boolean indicating whether the event was scheduled
+* `as_schedule_recurring_action()` takes an interval in seconds as the recurring interval rather than an arbitrary string
+* `as_schedule_single_action()` & `as_schedule_recurring_action()` can accept a `$group` parameter to group different actions for the one plugin together.
+* the `wp_` prefix is substituted with `as_` and the term `event` is replaced with `action`
+
+## API Function Availability
+
+As mentioned in the [Usage - Load Order](/usage/#load-order) section, Action Scheduler will initialize itself on the `'init'` hook with priority `1`. While API functions are loaded prior to this and call be called, they should not be called until after `'init'` with priority `1`, because each component, like the data store, has not yet been initialized.
+
+Do not use Action Scheduler API functions prior to `'init'` hook with priority `1`. Doing so could lead to unexpected results, like data being stored in the incorrect location.
+
+## Function Reference / `as_schedule_single_action()`
+
+### Description
+
+Schedule an action to run one time.
+
+### Usage
+
+```php
+as_schedule_single_action( $timestamp, $hook, $args, $group )
+````
+
+### Parameters
+
+- **$timestamp** (integer)(required) The Unix timestamp representing the date you want the action to run. Default: _none_.
+- **$hook** (string)(required) Name of the action hook. Default: _none_.
+- **$args** (array) Arguments to pass to callbacks when the hook triggers. Default: _`array()`_.
+- **$group** (array) The group to assign this job to. Default: _''_.
+
+### Return value
+
+(integer) the action's ID in the [posts](http://codex.wordpress.org/Database_Description#Table_Overview) table.
+
+
+## Function Reference / `as_schedule_recurring_action()`
+
+### Description
+
+Schedule an action to run repeatedly with a specified interval in seconds.
+
+### Usage
+
+```php
+as_schedule_recurring_action( $timestamp, $interval_in_seconds, $hook, $args, $group )
+````
+
+### Parameters
+
+- **$timestamp** (integer)(required) The Unix timestamp representing the date you want the action to run. Default: _none_.
+- **$interval_in_seconds** (integer)(required) How long to wait between runs. Default: _none_.
+- **$hook** (string)(required) Name of the action hook. Default: _none_.
+- **$args** (array) Arguments to pass to callbacks when the hook triggers. Default: _`array()`_.
+- **$group** (array) The group to assign this job to. Default: _''_.
+
+### Return value
+
+(integer) the action's ID in the [posts](http://codex.wordpress.org/Database_Description#Table_Overview) table.
+
+
+## Function Reference / `as_schedule_cron_action()`
+
+### Description
+
+Schedule an action that recurs on a cron-like schedule.
+
+### Usage
+
+```php
+as_schedule_cron_action( $timestamp, $schedule, $hook, $args, $group )
+````
+
+### Parameters
+
+- **$timestamp** (integer)(required) The Unix timestamp representing the date you want the action to run. Default: _none_.
+- **$schedule** (string)(required) $schedule A cron-link schedule string, see http://en.wikipedia.org/wiki/Cron. Default: _none_.
+- **$hook** (string)(required) Name of the action hook. Default: _none_.
+- **$args** (array) Arguments to pass to callbacks when the hook triggers. Default: _`array()`_.
+- **$group** (array) The group to assign this job to. Default: _''_.
+
+### Return value
+
+(integer) the action's ID in the [posts](http://codex.wordpress.org/Database_Description#Table_Overview) table.
+
+
+## Function Reference / `as_unschedule_action()`
+
+### Description
+
+Cancel the next occurrence of a job.
+
+### Usage
+
+```php
+as_unschedule_action( $hook, $args, $group )
+````
+
+### Parameters
+
+- **$hook** (string)(required) Name of the action hook. Default: _none_.
+- **$args** (array) Arguments to pass to callbacks when the hook triggers. Default: _`array()`_.
+- **$group** (array) The group to assign this job to. Default: _''_.
+
+### Return value
+
+(null)
+
+
+## Function Reference / `as_next_scheduled_action()`
+
+### Description
+
+Returns the next timestamp for a scheduled action.
+
+### Usage
+
+```php
+as_next_scheduled_action( $hook, $args, $group )
+````
+
+### Parameters
+
+- **$hook** (string)(required) Name of the action hook. Default: _none_.
+- **$args** (array) Arguments to pass to callbacks when the hook triggers. Default: _`array()`_.
+- **$group** (array) The group to assign this job to. Default: _''_.
+
+### Return value
+
+(integer|boolean) The timestamp for the next occurrence, or false if nothing was found.
+
+
+## Function Reference / `as_get_scheduled_actions()`
+
+### Description
+
+Find scheduled actions.
+
+### Usage
+
+```php
+as_get_scheduled_actions( $args, $return_format )
+````
+
+### Parameters
+
+- **$args** (array) Arguments to search and filter results by. Possible arguments, with their default values:
+    * `'hook' => ''` - the name of the action that will be triggered
+    * `'args' => NULL` - the args array that will be passed with the action
+    * `'date' => NULL` - the scheduled date of the action. Expects a DateTime object, a unix timestamp, or a string that can parsed with strtotime().
+    * `'date_compare' => '<=`' - operator for testing "date". accepted values are '!=', '>', '>=', '<', '<=', '='
+    * `'modified' => NULL` - the date the action was last updated. Expects a DateTime object, a unix timestamp, or a string that can parsed with strtotime().
+    * `'modified_compare' => '<='` - operator for testing "modified". accepted values are '!=', '>', '>=', '<', '<=', '='
+    * `'group' => ''` - the group the action belongs to
+    * `'status' => ''` - ActionScheduler_Store::STATUS_COMPLETE or ActionScheduler_Store::STATUS_PENDING
+    * `'claimed' => NULL` - TRUE to find claimed actions, FALSE to find unclaimed actions, a string to find a specific claim ID
+    * `'per_page' => 5` - Number of results to return
+    * `'offset' => 0`
+    * `'orderby' => 'date'` - accepted values are 'hook', 'group', 'modified', or 'date'
+    * `'order' => 'ASC'`
+- **$return_format** (string) The format in which to return the scheduled actions: 'OBJECT', 'ARRAY_A', or 'ids'. Default: _'OBJECT'_.
+
+### Return value
+
+(array) Array of the actions matching the criteria specified with `$args`.

docs/assets/css/style.scss

@@ -0,0 +1,57 @@
+---
+---
+
+@import "{{ site.theme }}";
+
+a {
+	text-shadow: none;
+	text-decoration: none;
+}
+
+a:hover {
+	text-decoration: underline;
+}
+
+header h1 a {
+	color: #b5e853;
+}
+
+.container {
+	max-width: 700px;
+}
+
+footer {
+	margin-top: 6em;
+	padding: 1.6em 0;
+	border-top: 1px dashed #b5e853;
+}
+
+.footer-image {
+	text-align: center;
+	padding-top: 1em;
+}
+
+.github-corner:hover .octo-arm {
+	animation:octocat-wave 560ms ease-in-out
+}
+
+@keyframes octocat-wave{
+	0%,100%{
+		transform:rotate(0)
+	}
+	20%,60%{
+		transform:rotate(-25deg)
+	}
+	40%,80%{
+		transform:rotate(10deg)
+	}
+}
+
+@media (max-width:500px){
+	.github-corner:hover .octo-arm {
+		animation:none
+	}
+	.github-corner .octo-arm{
+		animation:octocat-wave 560ms ease-in-out
+	}
+}

docs/browserconfig.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/mstile-150x150.png"/>
+            <TileColor>#151515</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>

docs/faq.md

@@ -0,0 +1,101 @@
+## FAQ
+
+### Is it safe to release Action Scheduler in my plugin? Won't its functions conflict with another copy of the library?
+
+Action Scheduler is designed to be used and released in plugins. It avoids redeclaring public API functions when more than one copy of the library is being loaded by different plugins. It will also load only the most recent version of itself (by checking registered versions after all plugins are loaded on the `'plugins_loaded'` hook).
+
+To use it in your plugin, simply require the `action-scheduler/action-scheduler.php` file. Action Scheduler will take care of the rest.
+
+### I don't want to use WP-Cron. Does Action Scheduler depend on WP-Cron?
+
+By default, Action Scheduler is initiated by WP-Cron. However, it has no dependency on the WP-Cron system. You can initiate the Action Scheduler queue in other ways with just one or two lines of code.
+
+For example, you can start a queue directly by calling:
+
+```php
+ActionScheduler::runner()->run();
+```
+
+Or trigger the `'action_scheduler_run_queue'` hook and let Action Scheduler do it for you:
+
+```php
+do_action( 'action_scheduler_run_queue' );
+```
+
+Further customization can be done by extending the `ActionScheduler_Abstract_QueueRunner` class to create a custom Queue Runner. For an example of a customized queue runner, see the [`ActionScheduler_WPCLI_QueueRunner`](https://github.com/Prospress/action-scheduler/blob/master/classes/ActionScheduler_WPCLI_QueueRunner.php), which is used when running WP CLI.
+
+Want to create some other method for initiating Action Scheduler? [Open a new issue](https://github.com/Prospress/action-scheduler/issues/new), we'd love to help you with it.
+
+### I don't want to use WP-Cron, ever. Does Action Scheduler replace WP-Cron?
+
+By default, Action Scheduler is designed to work alongside WP-Cron and not change any of its behaviour. This helps avoid unexpectedly overriding WP-Cron on sites installing your plugin, which may have nothing to do with WP-Cron.
+
+However, we can understand why you might want to replace WP-Cron completely in environments within you control, especially as it gets you the advantages of Action Scheduler. This should be possible without too much code.
+
+You could use the `'schedule_event'` hook in WordPress to use Action Scheduler for only newly scheduled WP-Cron jobs and map the `$event` param to Action Scheduler API functions.
+
+Alternatively, you can use a combination of the `'pre_update_option_cron'` and  `'pre_option_cron'` hooks to override all new and previously scheduled WP-Cron jobs (similar to the way [Cavalcade](https://github.com/humanmade/Cavalcade) does it).
+
+If you'd like to create a plugin to do this automatically and want to share your work with others, [open a new issue to let us know](https://github.com/Prospress/action-scheduler/issues/new), we'd love to help you with it.
+
+### Eww gross, Custom Post Types! That's _so_ 2010. Can I use a different storage scheme?
+
+Of course! Action Scheduler data storage is completely swappable, and always has been.
+
+You can store scheduled actions in custom tables in the WordPress site's database. Some sites using it already are. You can actually store them anywhere for that matter, like in a remote storage service from Amazon Web Services.
+
+To implement a custom store:
+
+1. extend the abstract `ActionScheduler_Store` class, being careful to implement each of its methods
+2. attach a callback to `'action_scheduler_store_class'` to tell Action Scheduler your class is the one which should be used to manage storage, e.g.
+
+```
+function eg_define_custom_store( $existing_storage_class ) {
+	return 'My_Radical_Action_Scheduler_Store';
+}
+add_filter( 'action_scheduler_store_class', 'eg_define_custom_store', 10, 1 );
+```
+
+Take a look at the `ActionScheduler_wpPostStore` class for an example implementation of `ActionScheduler_Store`.
+
+If you'd like to create a plugin to do this automatically and release it publicly to help others, [open a new issue to let us know](https://github.com/Prospress/action-scheduler/issues/new), we'd love to help you with it.
+
+> Note: we're also moving Action Scheduler itself to use [custom tables for better scalability](https://github.com/Prospress/action-scheduler/issues/77).
+
+### Can I use a different storage scheme just for logging?
+
+Of course! Action Scheduler's logger is completely swappable, and always has been. You can also customise where logs are stored, and the storage mechanism.
+
+To implement a custom logger:
+
+1. extend the abstract `ActionScheduler_Logger` class, being careful to implement each of its methods
+2. attach a callback to `'action_scheduler_logger_class'` to tell Action Scheduler your class is the one which should be used to manage logging, e.g.
+
+```
+function eg_define_custom_logger( $existing_storage_class ) {
+	return 'My_Radical_Action_Scheduler_Logger';
+}
+add_filter( 'action_scheduler_logger_class', 'eg_define_custom_logger', 10, 1 );
+```
+
+Take a look at the `ActionScheduler_wpCommentLogger` class for an example implementation of `ActionScheduler_Logger`.
+
+### I want to run Action Scheduler only on a dedicated application server in my cluster. Can I do that?
+
+Wow, now you're really asking the tough questions. In theory, yes, this is possible. The `ActionScheduler_QueueRunner` class, which is responsible for running queues, is swappable via the `'action_scheduler_queue_runner_class'` filter.
+
+Because of this, you can effectively customise queue running however you need. Whether that means tweaking minor things, like not using WP-Cron at all to initiate queues by overriding `ActionScheduler_QueueRunner::init()`, or completely changing how and where queues are run, by overriding `ActionScheduler_QueueRunner::run()`.
+
+### Is Action Scheduler safe to use on my production site?
+
+Yes, absolutely! Action Scheduler is actively used on tens of thousands of production sites already. Right now it's responsible for scheduling everything from emails to payments.
+
+In fact, every month, Action Scheduler processes millions of payments as part of the [WooCommerce Subscriptions](https://woocommerce.com/products/woocommerce-subscriptions/) extension.
+
+It requires no setup, and won't override any WordPress APIs (unless you want it to).
+
+### How does Action Scheduler work on WordPress Multisite?
+
+Action Scheduler is designed to manage the scheduled actions on a single site. It has no special handling for running queues across multiple sites in a multisite network. That said, because it's storage and Queue Runner are completely swappable, it would be possible to write multisite handling classes to use with it.
+
+If you'd like to create a multisite plugin to do this and release it publicly to help others, [open a new issue to let us know](https://github.com/Prospress/action-scheduler/issues/new), we'd love to help you with it.

docs/google14ef723abb376cd3.html

@@ -0,0 +1 @@
+google-site-verification: google14ef723abb376cd3.html

docs/index.md

@@ -0,0 +1,68 @@
+---
+title: Action Scheduler - Background Processing Job Queue for WordPress
+---
+## WordPress Job Queue with Background Processing
+
+Action Scheduler is a library for triggering a WordPress hook to run at some time in the future. Each hook can be scheduled with unique data, to allow callbacks to perform operations on that data. The hook can also be scheduled to run on one or more occassions.
+
+Think of it like an extension to `do_action()` which adds the ability to delay and repeat a hook.
+
+It just so happens, this functionality also creates a robust job queue for background processing large queues of tasks in WordPress. With the additional of logging and an [administration interface](/admin/), that also provide tracability on your tasks processed in the background.
+
+### Battle-Tested Background Processing
+
+Every month, Action Scheduler processes millions of payments for [Subscriptions](https://woocommerce.com/products/woocommerce-subscriptions/), webhooks for [WooCommerce](https://wordpress.org/plugins/woocommerce/), as well as emails and other events for a range of other plugins.
+
+It's been seen on live sites processing queues in excess of 50,000 jobs and doing resource intensive operations, like processing payments and creating orders, in 10 concurrent queues at a rate of over 10,000 actions / hour without negatively impacting normal site operations.
+
+This is all possible on infrastructure and WordPress sites outside the control of the plugin author.
+
+Action Scheduler is specifically designed for distribution in WordPress plugins (and themes) - no server access required. If your plugin needs background processing, especially of large sets of tasks, Action Scheduler can help.
+
+### How it Works
+
+Action Scheduler uses a WordPress [custom post type](http://codex.wordpress.org/Post_Types), creatively named `scheduled-action`, to store the hook name, arguments and scheduled date for an action that should be triggered at some time in the future.
+
+The scheduler will attempt to run every minute by attaching itself as a callback to the `'action_scheduler_run_schedule'` hook, which is scheduled using WordPress's built-in [WP-Cron](http://codex.wordpress.org/Function_Reference/wp_cron) system.
+
+When triggered, Action Scheduler will check for posts of the `scheduled-action` type that have a `post_date` at or before this point in time i.e. actions scheduled to run now or at sometime in the past.
+
+### Batch Processing Background Jobs
+
+If there are actions to be processed, Action Scheduler will stake a unique claim for a batch of 20 actions and begin processing that batch. The PHP process spawned to run the batch will then continue processing batches of 20 actions until it times out or exhausts available memory.
+
+If your site has a large number of actions scheduled to run at the same time, Action Scheduler will process more than one batch at a time. Specifically, when the `'action_scheduler_run_schedule'` hook is triggered approximately one minute after the first batch began processing, a new PHP process will stake a new claim to a batch of actions which were not claimed by the previous process. It will then begin to process that batch.
+
+This will continue until all actions are processed using a maximum of 5 concurrent queues.
+
+### Housekeeping
+
+Before processing a batch, the scheduler will remove any existing claims on actions which have been sitting in a queue for more than five minutes.
+
+Action Scheduler will also trash any actions which were completed more than a month ago.
+
+If an action runs for more than 5 minutes, Action Scheduler will assume the action has timed out and will mark it as failed. However, if all callbacks attached to the action were to successfully complete sometime after that 5 minute timeout, its status would later be updated to completed.
+
+### Traceable Background Processing
+
+Did your background job run?
+
+Never be left wondering with Action Scheduler's built-in record keeping.
+
+All events for each action are logged in the [comments table](http://codex.wordpress.org/Database_Description#Table_Overview) and displayed in the [administration interface](/admin/).
+
+The events logged by default include when an action:
+ * is created
+ * starts
+ * completes
+ * fails
+
+If it fails with an error that can be recorded, that error will be recorded in the log and visible in administration interface, making it possible to trace what went wrong at some point in the past on a site you didn't have access to in the past.
+
+Actions can also be grouped together using a custom taxonomy named `action-group`.
+
+## Credits
+
+Developed and maintained by [Prospress](http://prospress.com/) in collaboration with [Flightless](https://flightless.us/).
+
+Collaboration is cool. We'd love to work with you to improve Action Scheduler. [Pull Requests](https://github.com/prospress/action-scheduler/pulls) welcome.

docs/perf.md

@@ -0,0 +1,127 @@
+---
+title: WordPress Background Processing at Scale - Action Scheduler Job Queue
+description: Learn how to do WordPress background processing at scale by tuning the Action Scheduler job queue's default WP Cron runner.
+---
+# Background Processing at Scale
+
+Action Scheduler's default processing is designed to work reliably across all different hosting environments. In order to achieve that, the default processing thresholds are very conservative.
+
+Specifically, Action Scheduler will only process actions until:
+
+* 90% of available memory is used
+* processing another 3 actions would exceed 30 seconds of total request time, based on the average processing time for the current batch
+
+On sites with large queues, this can result in very slow processing time.
+
+While using [WP CLI to process queues](/wp-cli/) is the best approach to increasing processing speed, on occasion, that is not a viable option. In these cases, it's also possible to increase the processing thresholds in Action Scheduler to increase the rate at which actions are processed by the default WP Cron queue runner.
+
+## Increasing Time Limit
+
+By default, Action Scheduler will only process actions for a maximum of 30 seconds. This time limit minimises the risk of a script timeout on unknown hosting environments, some of which enforce 30 second timeouts.
+
+If you know your host supports longer than this time limit for web requests, you can increase this time limit. This allows more actions to be processed in each request and reduces the lag between processing each queue, greating speeding up the processing rate of scheduled actions.
+
+For example, the following snippet will increase the timelimit to 2 minutes (120 seconds):
+
+```php
+function eg_increase_time_limit( $time_limit ) {
+	return 120;
+}
+add_filter( 'action_scheduler_queue_runner_time_limit', 'eg_increase_time_limit' );
+```
+
+Some of the known host time limits are:
+
+* 60 second on WP Engine
+* 120 seconds on Pantheon
+* 120 seconds on SiteGround
+
+## Increasing Batch Size
+
+By default, Action Scheduler will claim a batch of 25 actions. This small batch size is because the default time limit is only 30 seconds; however, if you know your actions are processing very quickly, e.g. taking microseconds not seconds, or that you have more than 30 second available to process each batch, increasing the batch size can improve performance.
+
+This is because claiming a batch has some overhead, so the less often a batch needs to be claimed, the faster actions can be processed.
+
+For example, to increase the batch size to 100, we can use the following function:
+
+```php
+function eg_increase_action_scheduler_batch_size( $batch_size ) {
+	return 100;
+}
+add_filter( 'action_scheduler_queue_runner_batch_size', 'eg_increase_action_scheduler_batch_size' );
+```
+
+## Increasing Concurrent Batches
+
+By default, Action Scheduler will run up to 5 concurrent batches of actions. This is to prevent consuming all the available connections or processes on your webserver.
+
+However, your server may allow a large number of connection, for example, because it has a high value for Apache's `MaxClients` setting or PHP-FPM's `pm.max_children` setting.
+
+If this is the case, you can use the `'action_scheduler_queue_runner_concurrent_batches'` filter to increase the number of conncurrent batches allowed, and therefore speed up processing large numbers of actions scheduled to be processed simultaneously.
+
+For example, to increase the allowed number of concurrent queues to 10, we can use the following code:
+
+```php
+function eg_increase_action_scheduler_concurrent_batches( $concurrent_batches ) {
+	return 10;
+}
+add_filter( 'action_scheduler_queue_runner_concurrent_batches', 'eg_increase_action_scheduler_concurrent_batches' );
+```
+
+## Increasing Initialisation Rate of Runners
+
+By default, Action scheduler initiates at most, one queue runner every time the `'action_scheduler_run_queue'` action is triggered by WP Cron.
+
+Because this action is only triggered at most once every minute, if a queue is only allowed to process for one minute, then there will never be more than one queue processing actions, greatly reducing the processing rate.
+
+To handle larger queues on more powerful servers, it's a good idea to initiate additional queue runners whenever the `'action_scheduler_run_queue'` action is run.
+
+That can be done by initiated additional secure requests to our server via loopback requests.
+
+The code below demonstrates how to create 5 loopback requests each time a queue begins
+
+```php
+/**
+ * Trigger 5 additional loopback requests with unique URL params.
+ */
+function eg_request_additional_runners() {
+
+	// allow self-signed SSL certificates
+	add_filter( 'https_local_ssl_verify', '__return_false', 100 );
+
+	for ( $i = 0; $i < 5; $i++ ) {
+		$response = wp_remote_post( admin_url( 'admin-ajax.php' ), array(
+			'method'      => 'POST',
+			'timeout'     => 45,
+			'redirection' => 5,
+			'httpversion' => '1.0',
+			'blocking'    => false,
+			'headers'     => array(),
+			'body'        => array(
+				'action'     => 'eg_create_additional_runners',
+				'instance'   => $i,
+				'eg_nonce' => wp_create_nonce( 'eg_additional_runner_' . $i ),
+			),
+			'cookies'     => array(),
+		) );
+	}
+}
+add_action( 'action_scheduler_run_queue', 'eg_request_additional_runners', 0 );
+
+/**
+ * Handle requests initiated by eg_request_additional_runners() and start a queue runner if the request is valid.
+ */
+function eg_create_additional_runners() {
+
+	if ( isset( $_POST['eg_nonce'] ) && isset( $_POST['instance'] ) && wp_verify_nonce( $_POST['eg_nonce'], 'eg_additional_runner_' . $_POST['instance'] ) ) {
+		ActionScheduler_QueueRunner::instance()->run();
+	}
+
+	wp_die();
+}
+add_action( 'wp_ajax_nopriv_eg_create_additional_runners', 'eg_create_additional_runners', 0 );
+```
+
+## High Volume Plugin
+
+It's not necessary to add all of this code yourself, the folks at [Prospress](https://prospress.com) have created a handy plugin to get access to each of these increases -  the [Action Scheduler - High Volume](https://github.com/prospress/action-scheduler-high-volume) plugin.

docs/safari-pinned-tab.svg

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docs/site.webmanifest

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+{
+    "name": "",
+    "short_name": "",
+    "icons": [
+        {
+            "src": "/android-chrome-192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "/android-chrome-256x256.png",
+            "sizes": "256x256",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#ffffff",
+    "background_color": "#ffffff",
+    "display": "standalone"
+}

docs/usage.md

@@ -0,0 +1,123 @@
+---
+description: Learn how to use the Action Scheduler background processing job queue for WordPress in your WordPress plugin.
+---
+# Usage
+
+Using Action Scheduler requires:
+
+1. installing the library
+1. scheduling and action
+1. attaching a callback to that action
+
+## Scheduling an Action
+
+To schedule an action, call the [API function](/api/) for the desired schedule type passing in the required parameters.
+
+The example code below shows everything needed to schedule a function to run at midnight, if it's not already scheduled:
+
+```php
+require_once( plugin_dir_path( __FILE__ ) . '/libraries/action-scheduler/action-scheduler.php' );
+
+/**
+ * Schedule an action with the hook 'eg_midnight_log' to run at midnight each day
+ * so that our callback is run then.
+ */
+function eg_log_action_data() {
+	if ( false === as_next_scheduled_action( 'eg_midnight_log' ) ) {
+		as_schedule_recurring_action( strtotime( 'midnight tonight' ), DAY_IN_SECONDS, 'eg_midnight_log' );
+	}
+}
+add_action( 'init', 'eg_log_action_data' );
+
+/**
+ * A callback to run when the 'eg_midnight_log' scheduled action is run.
+ */
+function eg_log_action_data() {
+	error_log( 'It is just after midnight on ' . date( 'Y-m-d' ) );
+}
+add_action( 'eg_midnight_log', 'eg_log_action_data' );
+```
+
+For more details on all available API functions, and the data they accept, refer to the [API Reference](/api/).
+
+## Installation
+
+There are two ways to install Action Scheduler:
+
+1. regular WordPress plugin; or
+1. a library within your plugin's codebase.
+
+### Usage as a Plugin
+
+Action Scheduler includes the necessary file headers to be used as a standard WordPress plugin.
+
+To install it as a plugin:
+
+1. Download the .zip archive of the latest [stable release](https://github.com/Prospress/action-scheduler/releases)
+1. Go to the **Plugins > Add New > Upload** administration screen on your WordPress site
+1. Select the archive file you just downloaded
+1. Click **Install Now**
+1. Click **Activate**
+
+Or clone the Git repository into your site's `wp-content/plugins` folder.
+
+Using Action Scheduler as a plugin can be handy for developing against newer versions, rather than having to update the subtree in your codebase. **When installed as a plugin, Action Scheduler does not provide any user interfaces for scheduling actions**. The only way to interact with Action Scheduler is via code.
+
+### Usage as a Library
+
+To use Action Scheduler as a library:
+
+1. include the Action Scheduler codebase
+1. load the library by including the `action-scheduler.php` file
+
+Using a [subtree in your plugin, theme or site's Git repository](https://www.atlassian.com/blog/git/alternatives-to-git-submodule-git-subtree) to include Action Scheduler is the recommended method. Composer can also be used.
+
+To include Action Scheduler as a git subtree:
+
+#### Step 1. Add the Repository as a Remote
+
+```
+git remote add -f subtree-action-scheduler https://github.com/Prospress/action-scheduler.git
+```
+
+Adding the subtree as a remote allows us to refer to it in short from via the name `subtree-action-scheduler`, instead of the full GitHub URL.
+
+#### Step 2. Add the Repo as a Subtree
+
+```
+git subtree add --prefix libraries/action-scheduler subtree-action-scheduler master --squash
+```
+
+This will add the `master` branch of Action Scheduler to your repository in the folder `libraries/action-scheduler`.
+
+You can change the `--prefix` to change where the code is included. Or change the `master` branch to a tag, like `2.1.0` to include only a stable version.
+
+#### Step 3. Update the Subtree
+
+To update Action Scheduler to a new version, use the commands:
+
+```
+git fetch subtree-action-scheduler master
+git subtree pull --prefix libraries/action-scheduler subtree-action-scheduler master --squash
+```
+
+### Loading Action Scheduler
+
+Regardless of how it is installed, to load Action Scheduler, you only need to include the `action-scheduler.php` file, e.g.
+
+```php
+<?php
+require_once( plugin_dir_path( __FILE__ ) . '/libraries/action-scheduler/action-scheduler.php' );
+```
+
+There is no need to call any functions or do else to initialize Action Scheduler.
+
+When the `action-scheduler.php` file is included, Action Scheduler will register the version in that file and then load the most recent version of itself on the site. It will also load the most recent version of [all API functions](https://github.com/prospress/action-scheduler#api-functions).
+
+### Load Order
+
+Action Scheduler will register its version on `'plugins_loaded'` with priority `0` - after all other plugin codebases has been loaded. Therefore **the `action-scheduler.php` file must be included before `'plugins_loaded'` priority `0`**.
+
+It is recommended to load it _when the file including it is included_. However, if you need to load it on a hook, then the hook must occur before `'plugins_loaded'`, or you can use `'plugins_loaded'` with negative priority, like `-10`.
+
+Action Scheduler will later initialize itself on `'init'` with priority `1`.  Action Scheduler APIs should not be used until after `'init'` with priority `1`.

docs/wp-cli.md

@@ -0,0 +1,73 @@
+---
+description: Learn how to do WordPress background processing at scale with WP CLI and the Action Scheduler job queue.
+---
+# WP CLI
+
+Action Scheduler has custom [WP CLI](http://wp-cli.org) commands available for processing actions.
+
+For large sites, WP CLI is a much better choice for running queues of actions than the default WP Cron runner. These are some common cases where WP CLI is a better option:
+
+* long-running tasks - Tasks that take a significant amount of time to run
+* large queues - A large number of tasks will naturally take a longer time
+* other plugins with extensive WP Cron usage - WP Cron's limited resources are spread across more tasks
+
+With a regular web request, you may have to deal with script timeouts enforced by hosts, or other restraints that make it more challenging to run Action Scheduler tasks. Utilizing WP CLI to run commands directly on the server give you more freedom. This means that you typically don't have the same constraints of a normal web request.
+
+If you choose to utilize WP CLI exclusively, you can disable the normal WP CLI queue runner by installing the [Action Scheduler - Disable Default Queue Runner](https://github.com/Prospress/action-scheduler-disable-default-runner) plugin. Note that if you do this, you **must** run Action Scheduler via WP CLI or another method, otherwise no scheduled actions will be processed.
+ 
+## Commands
+
+These are the commands available to use with Action Scheduler:
+
+* `action-scheduler run`
+    
+    Options:
+    * `--batch-size` - This is the number of actions to run in a single batch. The default is `100`.
+    * `--batches` - This is the number of batches to run. Using 0 means that batches will continue running until there are no more actions to run.
+    * `--hooks` - Process only actions with specific hook or hooks, like `'woocommerce_scheduled_subscription_payment'`. By default, actions with any hook will be processed. Define multiple hooks as a comma separated string (without spaces), e.g. `--hooks=woocommerce_scheduled_subscription_trial_end,woocommerce_scheduled_subscription_payment,woocommerce_scheduled_subscription_expiration`
+    * `--group` - Process only actions in a specific group, like `'woocommerce-memberships'`. By default, actions in any group (or no group) will be processed.
+    * `--force` - By default, Action Scheduler limits the number of concurrent batches that can be run at once to ensure the server does not get overwhelmed. Using the `--force` flag overrides this behavior to force the WP CLI queue to run.
+
+The best way to get a full list of commands and their available options is to use WP CLI itself. This can be done by running `wp action-scheduler` to list all Action Scheduler commands, or by including the `--help` flag with any of the individual commands. This will provide all relevant parameters and flags for the command.
+
+## Cautionary Note on Action Dependencies when using `--group` or `--hooks` Options
+
+The `--group` and `--hooks` options should be used with caution if you have an implicit dependency between scheduled actions based on their schedule.
+
+For example, consider two scheduled actions for the same subscription:
+
+* `scheduled_payment` scheduled for `2015-11-13 00:00:00` and
+* `scheduled_expiration` scheduled for `2015-11-13 00:01:00`.
+
+Under normal conditions, Action Scheduler will ensure the `scheduled_payment` action is run before the `scheduled_expiration` action. Becuase that's how they are scheduled.
+
+However, when using the `--hooks` option, the `scheduled_payment` and `scheduled_expiration` actions will be processed in separate queues. As a result, this dependency is not guaranteed.
+
+For example, consider a site with both:
+
+* 100,000 `scheduled_payment` actions, scheduled for `2015-11-13 00:00:00`
+* 100 `scheduled_expiration` actions, scheduled for `2015-11-13 00:01:00`
+
+If two queue runners are running alongside each other with each runner dedicated to just one of these hooks, the queue runner handling expiration hooks will complete the processing of the expiration hooks more quickly than the queue runner handling all the payment actions.
+
+**Because of this, the `--group` and `--hooks` options should be used with caution to avoid processing actions with an implicit dependency based on their schedule in separate queues.**
+
+## Improving Performance with `--group` or `--hooks`
+
+Being able to run queues for specific hooks or groups of actions is valuable at scale. Why? Because it means you can restrict the concurrency for similar actions.
+
+For example, let's say you have 300,000 actions queued up comprised of:
+
+* 100,000 renewals payments
+* 100,000 email notifications
+* 100,000 membership status updates
+
+Action Scheduler's default WP Cron queue runner will process them all together. e.g. when it claims a batch of actions, some may be emails, some membership updates and some renewals.
+
+When you add concurrency to that, you can end up with issues. For example, if you have 3 queues running, they may all be attempting to process similar actions at the same time, which can lead to querying the same database tables with similar queries. Depending on the code/queries running, this can lead to database locks or other issues.
+
+If you can batch based on each action's group, then you can improve performance by processing like actions consecutively, but still processing the full set of actions concurrently.
+
+For example, if one queue is created to process emails, another to process membership updates, and another to process renewal payments, then the same queries won't be run at the same time, and 3 separate queues will be able to run more efficiently.
+
+The WP CLI runner can achieve this using the `--group` option.

functions.php

@@ -0,0 +1,209 @@
+<?php
+
+/**
+ * General API functions for scheduling actions
+ */
+
+/**
+ * Schedule an action to run one time
+ *
+ * @param int $timestamp When the job will run
+ * @param string $hook The hook to trigger
+ * @param array $args Arguments to pass when the hook triggers
+ * @param string $group The group to assign this job to
+ *
+ * @return string The job ID
+ */
+function as_schedule_single_action( $timestamp, $hook, $args = array(), $group = '' ) {
+	return ActionScheduler::factory()->single( $hook, $args, $timestamp, $group );
+}
+
+/**
+ * Schedule a recurring action
+ *
+ * @param int $timestamp When the first instance of the job will run
+ * @param int $interval_in_seconds How long to wait between runs
+ * @param string $hook The hook to trigger
+ * @param array $args Arguments to pass when the hook triggers
+ * @param string $group The group to assign this job to
+ *
+ * @return string The job ID
+ */
+function as_schedule_recurring_action( $timestamp, $interval_in_seconds, $hook, $args = array(), $group = '' ) {
+	return ActionScheduler::factory()->recurring( $hook, $args, $timestamp, $interval_in_seconds, $group );
+}
+
+/**
+ * Schedule an action that recurs on a cron-like schedule.
+ *
+ * @param int $timestamp The schedule will start on or after this time
+ * @param string $schedule A cron-link schedule string
+ * @see http://en.wikipedia.org/wiki/Cron
+ *   *    *    *    *    *    *
+ *   ┬    ┬    ┬    ┬    ┬    ┬
+ *   |    |    |    |    |    |
+ *   |    |    |    |    |    + year [optional]
+ *   |    |    |    |    +----- day of week (0 - 7) (Sunday=0 or 7)
+ *   |    |    |    +---------- month (1 - 12)
+ *   |    |    +--------------- day of month (1 - 31)
+ *   |    +-------------------- hour (0 - 23)
+ *   +------------------------- min (0 - 59)
+ * @param string $hook The hook to trigger
+ * @param array $args Arguments to pass when the hook triggers
+ * @param string $group The group to assign this job to
+ *
+ * @return string The job ID
+ */
+function as_schedule_cron_action( $timestamp, $schedule, $hook, $args = array(), $group = '' ) {
+	return ActionScheduler::factory()->cron( $hook, $args, $timestamp, $schedule, $group );
+}
+
+/**
+ * Cancel the next occurrence of a scheduled action.
+ *
+ * While only the next instance of a recurring or cron action is unscheduled by this method, that will also prevent
+ * all future instances of that recurring or cron action from being run. Recurring and cron actions are scheduled in
+ * a sequence instead of all being scheduled at once. Each successive occurrence of a recurring action is scheduled
+ * only after the former action is run. If the next instance is never run, because it's unscheduled by this function,
+ * then the following instance will never be scheduled (or exist), which is effectively the same as being unscheduled
+ * by this method also.
+ *
+ * @param string $hook The hook that the job will trigger
+ * @param array $args Args that would have been passed to the job
+ * @param string $group
+ *
+ * @return string The scheduled action ID if a scheduled action was found, or empty string if no matching action found.
+ */
+function as_unschedule_action( $hook, $args = array(), $group = '' ) {
+	$params = array();
+	if ( is_array($args) ) {
+		$params['args'] = $args;
+	}
+	if ( !empty($group) ) {
+		$params['group'] = $group;
+	}
+	$job_id = ActionScheduler::store()->find_action( $hook, $params );
+
+	if ( ! empty( $job_id ) ) {
+		ActionScheduler::store()->cancel_action( $job_id );
+	}
+
+	return $job_id;
+}
+
+/**
+ * Cancel all occurrences of a scheduled action.
+ *
+ * @param string $hook The hook that the job will trigger
+ * @param array $args Args that would have been passed to the job
+ * @param string $group
+ */
+function as_unschedule_all_actions( $hook, $args = array(), $group = '' ) {
+	do {
+		$unscheduled_action = as_unschedule_action( $hook, $args, $group );
+	} while ( ! empty( $unscheduled_action ) );
+}
+
+/**
+ * @param string $hook
+ * @param array $args
+ * @param string $group
+ *
+ * @return int|bool The timestamp for the next occurrence, or false if nothing was found
+ */
+function as_next_scheduled_action( $hook, $args = NULL, $group = '' ) {
+	$params = array();
+	if ( is_array($args) ) {
+		$params['args'] = $args;
+	}
+	if ( !empty($group) ) {
+		$params['group'] = $group;
+	}
+	$job_id = ActionScheduler::store()->find_action( $hook, $params );
+	if ( empty($job_id) ) {
+		return false;
+	}
+	$job = ActionScheduler::store()->fetch_action( $job_id );
+	$next = $job->get_schedule()->next();
+	if ( $next ) {
+		return (int)($next->format('U'));
+	}
+	return false;
+}
+
+/**
+ * Find scheduled actions
+ *
+ * @param array $args Possible arguments, with their default values:
+ *        'hook' => '' - the name of the action that will be triggered
+ *        'args' => NULL - the args array that will be passed with the action
+ *        'date' => NULL - the scheduled date of the action. Expects a DateTime object, a unix timestamp, or a string that can parsed with strtotime(). Used in UTC timezone.
+ *        'date_compare' => '<=' - operator for testing "date". accepted values are '!=', '>', '>=', '<', '<=', '='
+ *        'modified' => NULL - the date the action was last updated. Expects a DateTime object, a unix timestamp, or a string that can parsed with strtotime(). Used in UTC timezone.
+ *        'modified_compare' => '<=' - operator for testing "modified". accepted values are '!=', '>', '>=', '<', '<=', '='
+ *        'group' => '' - the group the action belongs to
+ *        'status' => '' - ActionScheduler_Store::STATUS_COMPLETE or ActionScheduler_Store::STATUS_PENDING
+ *        'claimed' => NULL - TRUE to find claimed actions, FALSE to find unclaimed actions, a string to find a specific claim ID
+ *        'per_page' => 5 - Number of results to return
+ *        'offset' => 0
+ *        'orderby' => 'date' - accepted values are 'hook', 'group', 'modified', or 'date'
+ *        'order' => 'ASC'
+ *
+ * @param string $return_format OBJECT, ARRAY_A, or ids
+ *
+ * @return array
+ */
+function as_get_scheduled_actions( $args = array(), $return_format = OBJECT ) {
+	$store = ActionScheduler::store();
+	foreach ( array('date', 'modified') as $key ) {
+		if ( isset($args[$key]) ) {
+			$args[$key] = as_get_datetime_object($args[$key]);
+		}
+	}
+	$ids = $store->query_actions( $args );
+
+	if ( $return_format == 'ids' || $return_format == 'int' ) {
+		return $ids;
+	}
+
+	$actions = array();
+	foreach ( $ids as $action_id ) {
+		$actions[$action_id] = $store->fetch_action( $action_id );
+	}
+
+	if ( $return_format == ARRAY_A ) {
+		foreach ( $actions as $action_id => $action_object ) {
+			$actions[$action_id] = get_object_vars($action_object);
+		}
+	}
+
+	return $actions;
+}
+
+/**
+ * Helper function to create an instance of DateTime based on a given
+ * string and timezone. By default, will return the current date/time
+ * in the UTC timezone.
+ *
+ * Needed because new DateTime() called without an explicit timezone
+ * will create a date/time in PHP's timezone, but we need to have
+ * assurance that a date/time uses the right timezone (which we almost
+ * always want to be UTC), which means we need to always include the
+ * timezone when instantiating datetimes rather than leaving it up to
+ * the PHP default.
+ *
+ * @param mixed $date_string A date/time string. Valid formats are explained in http://php.net/manual/en/datetime.formats.php
+ * @param string $timezone A timezone identifier, like UTC or Europe/Lisbon. The list of valid identifiers is available http://php.net/manual/en/timezones.php
+ *
+ * @return ActionScheduler_DateTime
+ */
+function as_get_datetime_object( $date_string = null, $timezone = 'UTC' ) {
+	if ( is_object( $date_string ) && $date_string instanceof DateTime ) {
+		$date = new ActionScheduler_DateTime( $date_string->format( 'Y-m-d H:i:s' ), new DateTimeZone( $timezone ) );
+	} elseif ( is_numeric( $date_string ) ) {
+		$date = new ActionScheduler_DateTime( '@' . $date_string, new DateTimeZone( $timezone ) );
+	} else {
+		$date = new ActionScheduler_DateTime( $date_string, new DateTimeZone( $timezone ) );
+	}
+	return $date;
+}

lib/cron-expression/CronExpression.php

@@ -0,0 +1,318 @@
+<?php
+
+/**
+ * CRON expression parser that can determine whether or not a CRON expression is
+ * due to run, the next run date and previous run date of a CRON expression.
+ * The determinations made by this class are accurate if checked run once per
+ * minute (seconds are dropped from date time comparisons).
+ *
+ * Schedule parts must map to:
+ * minute [0-59], hour [0-23], day of month, month [1-12|JAN-DEC], day of week
+ * [1-7|MON-SUN], and an optional year.
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ * @link http://en.wikipedia.org/wiki/Cron
+ */
+class CronExpression
+{
+    const MINUTE = 0;
+    const HOUR = 1;
+    const DAY = 2;
+    const MONTH = 3;
+    const WEEKDAY = 4;
+    const YEAR = 5;
+
+    /**
+     * @var array CRON expression parts
+     */
+    private $cronParts;
+
+    /**
+     * @var CronExpression_FieldFactory CRON field factory
+     */
+    private $fieldFactory;
+
+    /**
+     * @var array Order in which to test of cron parts
+     */
+    private static $order = array(self::YEAR, self::MONTH, self::DAY, self::WEEKDAY, self::HOUR, self::MINUTE);
+
+    /**
+     * Factory method to create a new CronExpression.
+     *
+     * @param string $expression The CRON expression to create.  There are
+     *      several special predefined values which can be used to substitute the
+     *      CRON expression:
+     *
+     *      @yearly, @annually) - Run once a year, midnight, Jan. 1 - 0 0 1 1 *
+     *      @monthly - Run once a month, midnight, first of month - 0 0 1 * *
+     *      @weekly - Run once a week, midnight on Sun - 0 0 * * 0
+     *      @daily - Run once a day, midnight - 0 0 * * *
+     *      @hourly - Run once an hour, first minute - 0 * * * *
+     *
+*@param CronExpression_FieldFactory $fieldFactory (optional) Field factory to use
+     *
+     * @return CronExpression
+     */
+    public static function factory($expression, CronExpression_FieldFactory $fieldFactory = null)
+    {
+        $mappings = array(
+            '@yearly' => '0 0 1 1 *',
+            '@annually' => '0 0 1 1 *',
+            '@monthly' => '0 0 1 * *',
+            '@weekly' => '0 0 * * 0',
+            '@daily' => '0 0 * * *',
+            '@hourly' => '0 * * * *'
+        );
+
+        if (isset($mappings[$expression])) {
+            $expression = $mappings[$expression];
+        }
+
+        return new self($expression, $fieldFactory ? $fieldFactory : new CronExpression_FieldFactory());
+    }
+
+    /**
+     * Parse a CRON expression
+     *
+     * @param string       $expression   CRON expression (e.g. '8 * * * *')
+     * @param CronExpression_FieldFactory $fieldFactory Factory to create cron fields
+     */
+    public function __construct($expression, CronExpression_FieldFactory $fieldFactory)
+    {
+        $this->fieldFactory = $fieldFactory;
+        $this->setExpression($expression);
+    }
+
+    /**
+     * Set or change the CRON expression
+     *
+     * @param string $value CRON expression (e.g. 8 * * * *)
+     *
+     * @return CronExpression
+     * @throws InvalidArgumentException if not a valid CRON expression
+     */
+    public function setExpression($value)
+    {
+        $this->cronParts = preg_split('/\s/', $value, -1, PREG_SPLIT_NO_EMPTY);
+        if (count($this->cronParts) < 5) {
+            throw new InvalidArgumentException(
+                $value . ' is not a valid CRON expression'
+            );
+        }
+
+        foreach ($this->cronParts as $position => $part) {
+            $this->setPart($position, $part);
+        }
+
+        return $this;
+    }
+
+    /**
+     * Set part of the CRON expression
+     *
+     * @param int    $position The position of the CRON expression to set
+     * @param string $value    The value to set
+     *
+     * @return CronExpression
+     * @throws InvalidArgumentException if the value is not valid for the part
+     */
+    public function setPart($position, $value)
+    {
+        if (!$this->fieldFactory->getField($position)->validate($value)) {
+            throw new InvalidArgumentException(
+                'Invalid CRON field value ' . $value . ' as position ' . $position
+            );
+        }
+
+        $this->cronParts[$position] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Get a next run date relative to the current date or a specific date
+     *
+     * @param string|DateTime $currentTime (optional) Relative calculation date
+     * @param int             $nth         (optional) Number of matches to skip before returning a
+     *     matching next run date.  0, the default, will return the current
+     *     date and time if the next run date falls on the current date and
+     *     time.  Setting this value to 1 will skip the first match and go to
+     *     the second match.  Setting this value to 2 will skip the first 2
+     *     matches and so on.
+     * @param bool $allowCurrentDate (optional) Set to TRUE to return the
+     *     current date if it matches the cron expression
+     *
+     * @return DateTime
+     * @throws RuntimeException on too many iterations
+     */
+    public function getNextRunDate($currentTime = 'now', $nth = 0, $allowCurrentDate = false)
+    {
+        return $this->getRunDate($currentTime, $nth, false, $allowCurrentDate);
+    }
+
+    /**
+     * Get a previous run date relative to the current date or a specific date
+     *
+     * @param string|DateTime $currentTime      (optional) Relative calculation date
+     * @param int             $nth              (optional) Number of matches to skip before returning
+     * @param bool            $allowCurrentDate (optional) Set to TRUE to return the
+     *     current date if it matches the cron expression
+     *
+     * @return DateTime
+     * @throws RuntimeException on too many iterations
+     * @see CronExpression::getNextRunDate
+     */
+    public function getPreviousRunDate($currentTime = 'now', $nth = 0, $allowCurrentDate = false)
+    {
+        return $this->getRunDate($currentTime, $nth, true, $allowCurrentDate);
+    }
+
+    /**
+     * Get multiple run dates starting at the current date or a specific date
+     *
+     * @param int             $total            Set the total number of dates to calculate
+     * @param string|DateTime $currentTime      (optional) Relative calculation date
+     * @param bool            $invert           (optional) Set to TRUE to retrieve previous dates
+     * @param bool            $allowCurrentDate (optional) Set to TRUE to return the
+     *     current date if it matches the cron expression
+     *
+     * @return array Returns an array of run dates
+     */
+    public function getMultipleRunDates($total, $currentTime = 'now', $invert = false, $allowCurrentDate = false)
+    {
+        $matches = array();
+        for ($i = 0; $i < max(0, $total); $i++) {
+            $matches[] = $this->getRunDate($currentTime, $i, $invert, $allowCurrentDate);
+        }
+
+        return $matches;
+    }
+
+    /**
+     * Get all or part of the CRON expression
+     *
+     * @param string $part (optional) Specify the part to retrieve or NULL to
+     *      get the full cron schedule string.
+     *
+     * @return string|null Returns the CRON expression, a part of the
+     *      CRON expression, or NULL if the part was specified but not found
+     */
+    public function getExpression($part = null)
+    {
+        if (null === $part) {
+            return implode(' ', $this->cronParts);
+        } elseif (array_key_exists($part, $this->cronParts)) {
+            return $this->cronParts[$part];
+        }
+
+        return null;
+    }
+
+    /**
+     * Helper method to output the full expression.
+     *
+     * @return string Full CRON expression
+     */
+    public function __toString()
+    {
+        return $this->getExpression();
+    }
+
+    /**
+     * Determine if the cron is due to run based on the current date or a
+     * specific date.  This method assumes that the current number of
+     * seconds are irrelevant, and should be called once per minute.
+     *
+     * @param string|DateTime $currentTime (optional) Relative calculation date
+     *
+     * @return bool Returns TRUE if the cron is due to run or FALSE if not
+     */
+    public function isDue($currentTime = 'now')
+    {
+        if ('now' === $currentTime) {
+            $currentDate = date('Y-m-d H:i');
+            $currentTime = strtotime($currentDate);
+        } elseif ($currentTime instanceof DateTime) {
+            $currentDate = $currentTime->format('Y-m-d H:i');
+            $currentTime = strtotime($currentDate);
+        } else {
+            $currentTime = new DateTime($currentTime);
+            $currentTime->setTime($currentTime->format('H'), $currentTime->format('i'), 0);
+            $currentDate = $currentTime->format('Y-m-d H:i');
+            $currentTime = (int)($currentTime->getTimestamp());
+        }
+
+        return $this->getNextRunDate($currentDate, 0, true)->getTimestamp() == $currentTime;
+    }
+
+    /**
+     * Get the next or previous run date of the expression relative to a date
+     *
+     * @param string|DateTime $currentTime      (optional) Relative calculation date
+     * @param int             $nth              (optional) Number of matches to skip before returning
+     * @param bool            $invert           (optional) Set to TRUE to go backwards in time
+     * @param bool            $allowCurrentDate (optional) Set to TRUE to return the
+     *     current date if it matches the cron expression
+     *
+     * @return DateTime
+     * @throws RuntimeException on too many iterations
+     */
+    protected function getRunDate($currentTime = null, $nth = 0, $invert = false, $allowCurrentDate = false)
+    {
+        if ($currentTime instanceof DateTime) {
+            $currentDate = $currentTime;
+        } else {
+            $currentDate = new DateTime($currentTime ? $currentTime : 'now');
+            $currentDate->setTimezone(new DateTimeZone(date_default_timezone_get()));
+        }
+
+        $currentDate->setTime($currentDate->format('H'), $currentDate->format('i'), 0);
+        $nextRun = clone $currentDate;
+        $nth = (int) $nth;
+
+        // Set a hard limit to bail on an impossible date
+        for ($i = 0; $i < 1000; $i++) {
+
+            foreach (self::$order as $position) {
+                $part = $this->getExpression($position);
+                if (null === $part) {
+                    continue;
+                }
+
+                $satisfied = false;
+                // Get the field object used to validate this part
+                $field = $this->fieldFactory->getField($position);
+                // Check if this is singular or a list
+                if (strpos($part, ',') === false) {
+                    $satisfied = $field->isSatisfiedBy($nextRun, $part);
+                } else {
+                    foreach (array_map('trim', explode(',', $part)) as $listPart) {
+                        if ($field->isSatisfiedBy($nextRun, $listPart)) {
+                            $satisfied = true;
+                            break;
+                        }
+                    }
+                }
+
+                // If the field is not satisfied, then start over
+                if (!$satisfied) {
+                    $field->increment($nextRun, $invert);
+                    continue 2;
+                }
+            }
+
+            // Skip this match if needed
+            if ((!$allowCurrentDate && $nextRun == $currentDate) || --$nth > -1) {
+                $this->fieldFactory->getField(0)->increment($nextRun, $invert);
+                continue;
+            }
+
+            return $nextRun;
+        }
+
+        // @codeCoverageIgnoreStart
+        throw new RuntimeException('Impossible CRON expression');
+        // @codeCoverageIgnoreEnd
+    }
+}

lib/cron-expression/CronExpression_AbstractField.php

@@ -0,0 +1,100 @@
+<?php
+
+/**
+ * Abstract CRON expression field
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ */
+abstract class CronExpression_AbstractField implements CronExpression_FieldInterface
+{
+    /**
+     * Check to see if a field is satisfied by a value
+     *
+     * @param string $dateValue Date value to check
+     * @param string $value     Value to test
+     *
+     * @return bool
+     */
+    public function isSatisfied($dateValue, $value)
+    {
+        if ($this->isIncrementsOfRanges($value)) {
+            return $this->isInIncrementsOfRanges($dateValue, $value);
+        } elseif ($this->isRange($value)) {
+            return $this->isInRange($dateValue, $value);
+        }
+
+        return $value == '*' || $dateValue == $value;
+    }
+
+    /**
+     * Check if a value is a range
+     *
+     * @param string $value Value to test
+     *
+     * @return bool
+     */
+    public function isRange($value)
+    {
+        return strpos($value, '-') !== false;
+    }
+
+    /**
+     * Check if a value is an increments of ranges
+     *
+     * @param string $value Value to test
+     *
+     * @return bool
+     */
+    public function isIncrementsOfRanges($value)
+    {
+        return strpos($value, '/') !== false;
+    }
+
+    /**
+     * Test if a value is within a range
+     *
+     * @param string $dateValue Set date value
+     * @param string $value     Value to test
+     *
+     * @return bool
+     */
+    public function isInRange($dateValue, $value)
+    {
+        $parts = array_map('trim', explode('-', $value, 2));
+
+        return $dateValue >= $parts[0] && $dateValue <= $parts[1];
+    }
+
+    /**
+     * Test if a value is within an increments of ranges (offset[-to]/step size)
+     *
+     * @param string $dateValue Set date value
+     * @param string $value     Value to test
+     *
+     * @return bool
+     */
+    public function isInIncrementsOfRanges($dateValue, $value)
+    {
+        $parts = array_map('trim', explode('/', $value, 2));
+        $stepSize = isset($parts[1]) ? $parts[1] : 0;
+        if ($parts[0] == '*' || $parts[0] === '0') {
+            return (int) $dateValue % $stepSize == 0;
+        }
+
+        $range = explode('-', $parts[0], 2);
+        $offset = $range[0];
+        $to = isset($range[1]) ? $range[1] : $dateValue;
+        // Ensure that the date value is within the range
+        if ($dateValue < $offset || $dateValue > $to) {
+            return false;
+        }
+
+        for ($i = $offset; $i <= $to; $i+= $stepSize) {
+            if ($i == $dateValue) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}

lib/cron-expression/CronExpression_DayOfMonthField.php

@@ -0,0 +1,110 @@
+<?php
+
+/**
+ * Day of month field.  Allows: * , / - ? L W
+ *
+ * 'L' stands for "last" and specifies the last day of the month.
+ *
+ * The 'W' character is used to specify the weekday (Monday-Friday) nearest the
+ * given day. As an example, if you were to specify "15W" as the value for the
+ * day-of-month field, the meaning is: "the nearest weekday to the 15th of the
+ * month". So if the 15th is a Saturday, the trigger will fire on Friday the
+ * 14th. If the 15th is a Sunday, the trigger will fire on Monday the 16th. If
+ * the 15th is a Tuesday, then it will fire on Tuesday the 15th. However if you
+ * specify "1W" as the value for day-of-month, and the 1st is a Saturday, the
+ * trigger will fire on Monday the 3rd, as it will not 'jump' over the boundary
+ * of a month's days. The 'W' character can only be specified when the
+ * day-of-month is a single day, not a range or list of days.
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ */
+class CronExpression_DayOfMonthField extends CronExpression_AbstractField
+{
+    /**
+     * Get the nearest day of the week for a given day in a month
+     *
+     * @param int $currentYear  Current year
+     * @param int $currentMonth Current month
+     * @param int $targetDay    Target day of the month
+     *
+     * @return DateTime Returns the nearest date
+     */
+    private static function getNearestWeekday($currentYear, $currentMonth, $targetDay)
+    {
+        $tday = str_pad($targetDay, 2, '0', STR_PAD_LEFT);
+        $target = new DateTime("$currentYear-$currentMonth-$tday");
+        $currentWeekday = (int) $target->format('N');
+
+        if ($currentWeekday < 6) {
+            return $target;
+        }
+
+        $lastDayOfMonth = $target->format('t');
+
+        foreach (array(-1, 1, -2, 2) as $i) {
+            $adjusted = $targetDay + $i;
+            if ($adjusted > 0 && $adjusted <= $lastDayOfMonth) {
+                $target->setDate($currentYear, $currentMonth, $adjusted);
+                if ($target->format('N') < 6 && $target->format('m') == $currentMonth) {
+                    return $target;
+                }
+            }
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isSatisfiedBy(DateTime $date, $value)
+    {
+        // ? states that the field value is to be skipped
+        if ($value == '?') {
+            return true;
+        }
+
+        $fieldValue = $date->format('d');
+
+        // Check to see if this is the last day of the month
+        if ($value == 'L') {
+            return $fieldValue == $date->format('t');
+        }
+
+        // Check to see if this is the nearest weekday to a particular value
+        if (strpos($value, 'W')) {
+            // Parse the target day
+            $targetDay = substr($value, 0, strpos($value, 'W'));
+            // Find out if the current day is the nearest day of the week
+            return $date->format('j') == self::getNearestWeekday(
+                $date->format('Y'),
+                $date->format('m'),
+                $targetDay
+            )->format('j');
+        }
+
+        return $this->isSatisfied($date->format('d'), $value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function increment(DateTime $date, $invert = false)
+    {
+        if ($invert) {
+            $date->modify('previous day');
+            $date->setTime(23, 59);
+        } else {
+            $date->modify('next day');
+            $date->setTime(0, 0);
+        }
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value)
+    {
+        return (bool) preg_match('/[\*,\/\-\?LW0-9A-Za-z]+/', $value);
+    }
+}

lib/cron-expression/CronExpression_DayOfWeekField.php

@@ -0,0 +1,124 @@
+<?php
+
+/**
+ * Day of week field.  Allows: * / , - ? L #
+ *
+ * Days of the week can be represented as a number 0-7 (0|7 = Sunday)
+ * or as a three letter string: SUN, MON, TUE, WED, THU, FRI, SAT.
+ *
+ * 'L' stands for "last". It allows you to specify constructs such as
+ * "the last Friday" of a given month.
+ *
+ * '#' is allowed for the day-of-week field, and must be followed by a
+ * number between one and five. It allows you to specify constructs such as
+ * "the second Friday" of a given month.
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ */
+class CronExpression_DayOfWeekField extends CronExpression_AbstractField
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function isSatisfiedBy(DateTime $date, $value)
+    {
+        if ($value == '?') {
+            return true;
+        }
+
+        // Convert text day of the week values to integers
+        $value = str_ireplace(
+            array('SUN', 'MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT'),
+            range(0, 6),
+            $value
+        );
+
+        $currentYear = $date->format('Y');
+        $currentMonth = $date->format('m');
+        $lastDayOfMonth = $date->format('t');
+
+        // Find out if this is the last specific weekday of the month
+        if (strpos($value, 'L')) {
+            $weekday = str_replace('7', '0', substr($value, 0, strpos($value, 'L')));
+            $tdate = clone $date;
+            $tdate->setDate($currentYear, $currentMonth, $lastDayOfMonth);
+            while ($tdate->format('w') != $weekday) {
+                $tdate->setDate($currentYear, $currentMonth, --$lastDayOfMonth);
+            }
+
+            return $date->format('j') == $lastDayOfMonth;
+        }
+
+        // Handle # hash tokens
+        if (strpos($value, '#')) {
+            list($weekday, $nth) = explode('#', $value);
+            // Validate the hash fields
+            if ($weekday < 1 || $weekday > 5) {
+                throw new InvalidArgumentException("Weekday must be a value between 1 and 5. {$weekday} given");
+            }
+            if ($nth > 5) {
+                throw new InvalidArgumentException('There are never more than 5 of a given weekday in a month');
+            }
+            // The current weekday must match the targeted weekday to proceed
+            if ($date->format('N') != $weekday) {
+                return false;
+            }
+
+            $tdate = clone $date;
+            $tdate->setDate($currentYear, $currentMonth, 1);
+            $dayCount = 0;
+            $currentDay = 1;
+            while ($currentDay < $lastDayOfMonth + 1) {
+                if ($tdate->format('N') == $weekday) {
+                    if (++$dayCount >= $nth) {
+                        break;
+                    }
+                }
+                $tdate->setDate($currentYear, $currentMonth, ++$currentDay);
+            }
+
+            return $date->format('j') == $currentDay;
+        }
+
+        // Handle day of the week values
+        if (strpos($value, '-')) {
+            $parts = explode('-', $value);
+            if ($parts[0] == '7') {
+                $parts[0] = '0';
+            } elseif ($parts[1] == '0') {
+                $parts[1] = '7';
+            }
+            $value = implode('-', $parts);
+        }
+
+        // Test to see which Sunday to use -- 0 == 7 == Sunday
+        $format = in_array(7, str_split($value)) ? 'N' : 'w';
+        $fieldValue = $date->format($format);
+
+        return $this->isSatisfied($fieldValue, $value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function increment(DateTime $date, $invert = false)
+    {
+        if ($invert) {
+            $date->modify('-1 day');
+            $date->setTime(23, 59, 0);
+        } else {
+            $date->modify('+1 day');
+            $date->setTime(0, 0, 0);
+        }
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value)
+    {
+        return (bool) preg_match('/[\*,\/\-0-9A-Z]+/', $value);
+    }
+}

lib/cron-expression/CronExpression_FieldFactory.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * CRON field factory implementing a flyweight factory
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ * @link http://en.wikipedia.org/wiki/Cron
+ */
+class CronExpression_FieldFactory
+{
+    /**
+     * @var array Cache of instantiated fields
+     */
+    private $fields = array();
+
+    /**
+     * Get an instance of a field object for a cron expression position
+     *
+     * @param int $position CRON expression position value to retrieve
+     *
+     * @return CronExpression_FieldInterface
+     * @throws InvalidArgumentException if a position is not valid
+     */
+    public function getField($position)
+    {
+        if (!isset($this->fields[$position])) {
+            switch ($position) {
+                case 0:
+                    $this->fields[$position] = new CronExpression_MinutesField();
+                    break;
+                case 1:
+                    $this->fields[$position] = new CronExpression_HoursField();
+                    break;
+                case 2:
+                    $this->fields[$position] = new CronExpression_DayOfMonthField();
+                    break;
+                case 3:
+                    $this->fields[$position] = new CronExpression_MonthField();
+                    break;
+                case 4:
+                    $this->fields[$position] = new CronExpression_DayOfWeekField();
+                    break;
+                case 5:
+                    $this->fields[$position] = new CronExpression_YearField();
+                    break;
+                default:
+                    throw new InvalidArgumentException(
+                        $position . ' is not a valid position'
+                    );
+            }
+        }
+
+        return $this->fields[$position];
+    }
+}

lib/cron-expression/CronExpression_FieldInterface.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * CRON field interface
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ */
+interface CronExpression_FieldInterface
+{
+    /**
+     * Check if the respective value of a DateTime field satisfies a CRON exp
+     *
+     * @param DateTime $date  DateTime object to check
+     * @param string   $value CRON expression to test against
+     *
+     * @return bool Returns TRUE if satisfied, FALSE otherwise
+     */
+    public function isSatisfiedBy(DateTime $date, $value);
+
+    /**
+     * When a CRON expression is not satisfied, this method is used to increment
+     * or decrement a DateTime object by the unit of the cron field
+     *
+     * @param DateTime $date   DateTime object to change
+     * @param bool     $invert (optional) Set to TRUE to decrement
+     *
+     * @return CronExpression_FieldInterface
+     */
+    public function increment(DateTime $date, $invert = false);
+
+    /**
+     * Validates a CRON expression for a given field
+     *
+     * @param string $value CRON expression value to validate
+     *
+     * @return bool Returns TRUE if valid, FALSE otherwise
+     */
+    public function validate($value);
+}

lib/cron-expression/CronExpression_HoursField.php

@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * Hours field.  Allows: * , / -
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ */
+class CronExpression_HoursField extends CronExpression_AbstractField
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function isSatisfiedBy(DateTime $date, $value)
+    {
+        return $this->isSatisfied($date->format('H'), $value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function increment(DateTime $date, $invert = false)
+    {
+        // Change timezone to UTC temporarily. This will
+        // allow us to go back or forwards and hour even
+        // if DST will be changed between the hours.
+        $timezone = $date->getTimezone();
+        $date->setTimezone(new DateTimeZone('UTC'));
+        if ($invert) {
+            $date->modify('-1 hour');
+            $date->setTime($date->format('H'), 59);
+        } else {
+            $date->modify('+1 hour');
+            $date->setTime($date->format('H'), 0);
+        }
+        $date->setTimezone($timezone);
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value)
+    {
+        return (bool) preg_match('/[\*,\/\-0-9]+/', $value);
+    }
+}

lib/cron-expression/CronExpression_MinutesField.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * Minutes field.  Allows: * , / -
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ */
+class CronExpression_MinutesField extends CronExpression_AbstractField
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function isSatisfiedBy(DateTime $date, $value)
+    {
+        return $this->isSatisfied($date->format('i'), $value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function increment(DateTime $date, $invert = false)
+    {
+        if ($invert) {
+            $date->modify('-1 minute');
+        } else {
+            $date->modify('+1 minute');
+        }
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value)
+    {
+        return (bool) preg_match('/[\*,\/\-0-9]+/', $value);
+    }
+}

lib/cron-expression/CronExpression_MonthField.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * Month field.  Allows: * , / -
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ */
+class CronExpression_MonthField extends CronExpression_AbstractField
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function isSatisfiedBy(DateTime $date, $value)
+    {
+        // Convert text month values to integers
+        $value = str_ireplace(
+            array(
+                'JAN', 'FEB', 'MAR', 'APR', 'MAY', 'JUN',
+                'JUL', 'AUG', 'SEP', 'OCT', 'NOV', 'DEC'
+            ),
+            range(1, 12),
+            $value
+        );
+
+        return $this->isSatisfied($date->format('m'), $value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function increment(DateTime $date, $invert = false)
+    {
+        if ($invert) {
+            // $date->modify('last day of previous month'); // remove for php 5.2 compat
+            $date->modify('previous month');
+            $date->modify($date->format('Y-m-t'));
+            $date->setTime(23, 59);
+        } else {
+            //$date->modify('first day of next month'); // remove for php 5.2 compat
+            $date->modify('next month');
+            $date->modify($date->format('Y-m-01'));
+            $date->setTime(0, 0);
+        }
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value)
+    {
+        return (bool) preg_match('/[\*,\/\-0-9A-Z]+/', $value);
+    }
+}

lib/cron-expression/CronExpression_YearField.php

@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * Year field.  Allows: * , / -
+ *
+ * @author Michael Dowling <mtdowling@gmail.com>
+ */
+class CronExpression_YearField extends CronExpression_AbstractField
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function isSatisfiedBy(DateTime $date, $value)
+    {
+        return $this->isSatisfied($date->format('Y'), $value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function increment(DateTime $date, $invert = false)
+    {
+        if ($invert) {
+            $date->modify('-1 year');
+            $date->setDate($date->format('Y'), 12, 31);
+            $date->setTime(23, 59, 0);
+        } else {
+            $date->modify('+1 year');
+            $date->setDate($date->format('Y'), 1, 1);
+            $date->setTime(0, 0, 0);
+        }
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value)
+    {
+        return (bool) preg_match('/[\*,\/\-0-9]+/', $value);
+    }
+}

lib/cron-expression/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2011 Michael Dowling <mtdowling@gmail.com> and contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

lib/cron-expression/README.md

@@ -0,0 +1,92 @@
+PHP Cron Expression Parser
+==========================
+
+[![Latest Stable Version](https://poser.pugx.org/mtdowling/cron-expression/v/stable.png)](https://packagist.org/packages/mtdowling/cron-expression) [![Total Downloads](https://poser.pugx.org/mtdowling/cron-expression/downloads.png)](https://packagist.org/packages/mtdowling/cron-expression) [![Build Status](https://secure.travis-ci.org/mtdowling/cron-expression.png)](http://travis-ci.org/mtdowling/cron-expression)
+
+The PHP cron expression parser can parse a CRON expression, determine if it is
+due to run, calculate the next run date of the expression, and calculate the previous
+run date of the expression.  You can calculate dates far into the future or past by
+skipping n number of matching dates.
+
+The parser can handle increments of ranges (e.g. */12, 2-59/3), intervals (e.g. 0-9),
+lists (e.g. 1,2,3), W to find the nearest weekday for a given day of the month, L to
+find the last day of the month, L to find the last given weekday of a month, and hash
+(#) to find the nth weekday of a given month.
+
+Credits
+==========
+
+Created by Micheal Dowling. Ported to PHP 5.2 by Flightless, Inc.
+Based on version 1.0.3: https://github.com/mtdowling/cron-expression/tree/v1.0.3
+
+Installing
+==========
+
+Add the following to your project's composer.json:
+
+```javascript
+{
+    "require": {
+        "mtdowling/cron-expression": "1.0.*"
+    }
+}
+```
+
+Usage
+=====
+```php
+<?php
+
+require_once '/vendor/autoload.php';
+
+// Works with predefined scheduling definitions
+$cron = Cron\CronExpression::factory('@daily');
+$cron->isDue();
+echo $cron->getNextRunDate()->format('Y-m-d H:i:s');
+echo $cron->getPreviousRunDate()->format('Y-m-d H:i:s');
+
+// Works with complex expressions
+$cron = Cron\CronExpression::factory('3-59/15 2,6-12 */15 1 2-5');
+echo $cron->getNextRunDate()->format('Y-m-d H:i:s');
+
+// Calculate a run date two iterations into the future
+$cron = Cron\CronExpression::factory('@daily');
+echo $cron->getNextRunDate(null, 2)->format('Y-m-d H:i:s');
+
+// Calculate a run date relative to a specific time
+$cron = Cron\CronExpression::factory('@monthly');
+echo $cron->getNextRunDate('2010-01-12 00:00:00')->format('Y-m-d H:i:s');
+```
+
+CRON Expressions
+================
+
+A CRON expression is a string representing the schedule for a particular command to execute.  The parts of a CRON schedule are as follows:
+
+    *    *    *    *    *    *
+    -    -    -    -    -    -
+    |    |    |    |    |    |
+    |    |    |    |    |    + year [optional]
+    |    |    |    |    +----- day of week (0 - 7) (Sunday=0 or 7)
+    |    |    |    +---------- month (1 - 12)
+    |    |    +--------------- day of month (1 - 31)
+    |    +-------------------- hour (0 - 23)
+    +------------------------- min (0 - 59)
+
+Requirements
+============
+
+- PHP 5.3+
+- PHPUnit is required to run the unit tests
+- Composer is required to run the unit tests
+
+CHANGELOG
+=========
+
+1.0.3 (2013-11-23)
+------------------
+
+* Only set default timezone if the given $currentTime is not a DateTime instance (#34)
+* Fixes issue #28 where PHP increments of ranges were failing due to PHP casting hyphens to 0
+* Now supports expressions with any number of extra spaces, tabs, or newlines
+* Using static instead of self in `CronExpression::factory`

license.txt

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

tests/ActionScheduler_UnitTestCase.php

@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * Class ActionScheduler_UnitTestCase
+ */
+class ActionScheduler_UnitTestCase extends WP_UnitTestCase {
+
+	protected $existing_timezone;
+
+	/**
+	 * Counts the number of test cases executed by run(TestResult result).
+	 *
+	 * @return int
+	 */
+	public function count() {
+		return 'UTC' == date_default_timezone_get() ? 2 : 3;
+	}
+
+	/**
+	 * We want to run every test multiple times using a different timezone to make sure
+	 * that they are unaffected by changes to PHP's timezone.
+	 */
+	public function run( PHPUnit\Framework\TestResult $result = NULL ){
+
+		if ($result === NULL) {
+			$result = $this->createResult();
+		}
+
+		if ( 'UTC' != ( $this->existing_timezone = date_default_timezone_get() ) ) {
+			date_default_timezone_set( 'UTC' );
+			$result->run( $this );
+		}
+
+		date_default_timezone_set( 'Pacific/Fiji' ); // UTC+12
+		$result->run( $this );
+
+		date_default_timezone_set( 'Pacific/Tahiti' ); // UTC-10: it's a magical place
+		$result->run( $this );
+
+		date_default_timezone_set( $this->existing_timezone );
+
+		return $result;
+	}
+}

tests/bootstrap.php

@@ -0,0 +1,31 @@
+<?php
+
+$GLOBALS['wp_tests_options'][ 'template' ] = 'twentyseventeen';
+$GLOBALS['wp_tests_options'][ 'stylesheet' ] = 'twentyseventeen';
+$GLOBALS['wp_tests_options'][ 'active_plugins' ][] = basename( dirname( __DIR__ ) ) .'/action-scheduler.php';
+
+// Check for select constants defined as environment variables
+foreach ( array('WP_CONTENT_DIR', 'WP_CONTENT_URL', 'WP_PLUGIN_DIR', 'WP_PLUGIN_URL', 'WPMU_PLUGIN_DIR') as $env_constant ) {
+	if ( false !== getenv( $env_constant ) && !defined( $env_constant ) ) {
+		define( $env_constant, getenv( $env_constant ));
+	}
+}
+
+// If the wordpress-tests repo location has been customized (and specified
+// with WP_TESTS_DIR), use that location. This will most commonly be the case
+// when configured for use with Travis CI.
+
+// Otherwise, we'll just assume that this plugin is installed in the WordPress
+// SVN external checkout configured in the wordpress-tests repo.
+
+if( false !== getenv( 'WP_TESTS_DIR' ) ) {
+	require getenv( 'WP_TESTS_DIR' ) . '/includes/bootstrap.php';
+} else {
+	require dirname( dirname( dirname( dirname( dirname( dirname( __FILE__ ) ) ) ) ) ) . '/tests/phpunit/includes/bootstrap.php';
+}
+
+if ( class_exists( 'PHPUnit\Framework\TestResult' ) ) { // PHPUnit 6.0 or newer
+	include_once('ActionScheduler_UnitTestCase.php');
+} else {
+	include_once('phpunit/deprecated/ActionScheduler_UnitTestCase.php');
+}

tests/phpunit.xml.dist

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<phpunit backupGlobals="false"
+				 backupStaticAttributes="false"
+				 colors="true"
+				 convertErrorsToExceptions="true"
+				 convertNoticesToExceptions="true"
+				 convertWarningsToExceptions="true"
+				 processIsolation="false"
+				 stopOnFailure="false"
+				 syntaxCheck="false"
+				 bootstrap="bootstrap.php"
+		>
+	<testsuites>
+		<testsuite name="Action Scheduler">
+			<directory>./phpunit</directory>
+		</testsuite>
+	</testsuites>
+	<groups>
+		<exclude>
+			<group>ignore</group>
+		</exclude>
+	</groups>
+	<filter>
+		<whitelist processsUncoveredFilesFromWhitelist="true">
+			<directory suffix=".php">..</directory>
+			<exclude>
+				<directory>.</directory>
+			</exclude>
+		</whitelist>
+	</filter>
+</phpunit>

tests/phpunit/deprecated/ActionScheduler_UnitTestCase.php

@@ -0,0 +1,44 @@
+<?php
+
+/**
+ * Class ActionScheduler_UnitTestCase
+ */
+class ActionScheduler_UnitTestCase extends WP_UnitTestCase {
+
+	protected $existing_timezone;
+
+	/**
+	 * Counts the number of test cases executed by run(TestResult result).
+	 *
+	 * @return int
+	 */
+	public function count() {
+		return 'UTC' == date_default_timezone_get() ? 2 : 3;
+	}
+
+	/**
+	 * We want to run every test multiple times using a different timezone to make sure
+	 * that they are unaffected by changes to PHP's timezone.
+	 */
+	public function run( PHPUnit_Framework_TestResult $result = NULL ){
+
+		if ($result === NULL) {
+			$result = $this->createResult();
+		}
+
+		if ( 'UTC' != ( $this->existing_timezone = date_default_timezone_get() ) ) {
+			date_default_timezone_set( 'UTC' );
+			$result->run( $this );
+		}
+
+		date_default_timezone_set( 'Pacific/Fiji' ); // UTC+12
+		$result->run( $this );
+
+		date_default_timezone_set( 'Pacific/Tahiti' ); // UTC-10: it's a magical place
+		$result->run( $this );
+
+		date_default_timezone_set( $this->existing_timezone );
+
+		return $result;
+	}
+}

tests/phpunit/helpers/ActionScheduler_TimezoneHelper_Test.php

@@ -0,0 +1,100 @@
+<?php
+
+/**
+ * @group timezone
+ */
+class ActionScheduler_TimezoneHelper_Test extends ActionScheduler_UnitTestCase {
+
+	/**
+	 * Ensure that the timezone string we expect works properly.
+	 *
+	 * @dataProvider local_timezone_provider
+	 *
+	 * @param $timezone_string
+	 */
+	public function test_local_timezone_strings( $timezone_string ) {
+		$timezone_filter = function ( $tz ) use ( $timezone_string ) {
+			return $timezone_string;
+		};
+
+		add_filter( 'option_timezone_string', $timezone_filter );
+
+		$date     = new ActionScheduler_DateTime();
+		$timezone = ActionScheduler_TimezoneHelper::set_local_timezone( $date )->getTimezone();
+		$this->assertInstanceOf( 'DateTimeZone', $timezone );
+		$this->assertEquals( $timezone_string, $timezone->getName() );
+
+		remove_filter( 'option_timezone_string', $timezone_filter );
+	}
+
+	public function local_timezone_provider() {
+		return array(
+			array( 'America/New_York' ),
+			array( 'Australia/Melbourne' ),
+			array( 'UTC' ),
+		);
+	}
+
+	/**
+	 * Ensure that most GMT offsets don't return UTC as the timezone.
+	 *
+	 * @dataProvider local_timezone_offsets_provider
+	 *
+	 * @param $gmt_offset
+	 */
+	public function test_local_timezone_offsets( $gmt_offset ) {
+		$gmt_filter = function ( $gmt ) use ( $gmt_offset ) {
+			return $gmt_offset;
+		};
+
+		$date = new ActionScheduler_DateTime();
+
+		add_filter( 'option_gmt_offset', $gmt_filter );
+		ActionScheduler_TimezoneHelper::set_local_timezone( $date );
+		remove_filter( 'option_gmt_offset', $gmt_filter );
+
+		$offset_in_seconds = $gmt_offset * HOUR_IN_SECONDS;
+
+		$this->assertEquals( $offset_in_seconds, $date->getOffset() );
+		$this->assertEquals( $offset_in_seconds, $date->getOffsetTimestamp() - $date->getTimestamp() );
+	}
+
+	public function local_timezone_offsets_provider() {
+		return array(
+			array( '-11' ),
+			array( '-10.5' ),
+			array( '-10' ),
+			array( '-9' ),
+			array( '-8' ),
+			array( '-7' ),
+			array( '-6' ),
+			array( '-5' ),
+			array( '-4.5' ),
+			array( '-4' ),
+			array( '-3.5' ),
+			array( '-3' ),
+			array( '-2' ),
+			array( '-1' ),
+			array( '1' ),
+			array( '1.5' ),
+			array( '2' ),
+			array( '3' ),
+			array( '4' ),
+			array( '5' ),
+			array( '5.5' ),
+			array( '5.75' ),
+			array( '6' ),
+			array( '7' ),
+			array( '8' ),
+			array( '8.5' ),
+			array( '9' ),
+			array( '9.5' ),
+			array( '10' ),
+			array( '10.5' ),
+			array( '11' ),
+			array( '11.5' ),
+			array( '12' ),
+			array( '13' ),
+		);
+	}
+}

tests/phpunit/jobs/ActionScheduler_Action_Test.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * Class ActionScheduler_Action_Test
+ * @group actions
+ */
+class ActionScheduler_Action_Test extends ActionScheduler_UnitTestCase {
+	public function test_set_schedule() {
+		$time = as_get_datetime_object();
+		$schedule = new ActionScheduler_SimpleSchedule($time);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule);
+		$this->assertEquals( $schedule, $action->get_schedule() );
+	}
+
+	public function test_null_schedule() {
+		$action = new ActionScheduler_Action('my_hook');
+		$this->assertInstanceOf( 'ActionScheduler_NullSchedule', $action->get_schedule() );
+	}
+
+	public function test_set_hook() {
+		$action = new ActionScheduler_Action('my_hook');
+		$this->assertEquals( 'my_hook', $action->get_hook() );
+	}
+
+	public function test_args() {
+		$action = new ActionScheduler_Action('my_hook');
+		$this->assertEmpty($action->get_args());
+
+		$action = new ActionScheduler_Action('my_hook', array(5,10,15));
+		$this->assertEqualSets(array(5,10,15), $action->get_args());
+	}
+
+	public function test_set_group() {
+		$action = new ActionScheduler_Action('my_hook', array(), NULL, 'my_group');
+		$this->assertEquals('my_group', $action->get_group());
+	}
+
+	public function test_execute() {
+		$mock = new MockAction();
+
+		$random = md5(rand());
+		add_action( $random, array( $mock, 'action' ) );
+
+		$action = new ActionScheduler_Action( $random, array($random) );
+		$action->execute();
+
+		remove_action( $random, array( $mock, 'action' ) );
+
+		$this->assertEquals( 1, $mock->get_call_count() );
+		$events = $mock->get_events();
+		$event = reset($events);
+		$this->assertEquals( $random, reset($event['args']) );
+	}
+}
+ 

tests/phpunit/jobs/ActionScheduler_NullAction_Test.php

@@ -0,0 +1,16 @@
+<?php
+
+/**
+ * Class ActionScheduler_NullAction_Test
+ * @group actions
+ */
+class ActionScheduler_NullAction_Test extends ActionScheduler_UnitTestCase {
+	public function test_null_action() {
+		$action = new ActionScheduler_NullAction();
+
+		$this->assertEmpty($action->get_hook());
+		$this->assertEmpty($action->get_args());
+		$this->assertNull($action->get_schedule()->next());
+	}
+}
+ 

tests/phpunit/jobstore/ActionScheduler_wpPostStore_Test.php

@@ -0,0 +1,375 @@
+<?php
+
+/**
+ * Class ActionScheduler_wpPostStore_Test
+ * @group stores
+ */
+class ActionScheduler_wpPostStore_Test extends ActionScheduler_UnitTestCase {
+
+	public function test_create_action() {
+		$time = as_get_datetime_object();
+		$schedule = new ActionScheduler_SimpleSchedule($time);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule);
+		$store = new ActionScheduler_wpPostStore();
+		$action_id = $store->save_action($action);
+
+		$this->assertNotEmpty($action_id);
+	}
+
+	public function test_create_action_with_scheduled_date() {
+		$time   = as_get_datetime_object( strtotime( '-1 week' ) );
+		$action = new ActionScheduler_Action( 'my_hook', array(), new ActionScheduler_SimpleSchedule( $time ) );
+		$store  = new ActionScheduler_wpPostStore();
+
+		$action_id   = $store->save_action( $action, $time );
+		$action_date = $store->get_date( $action_id );
+
+		$this->assertEquals( $time->getTimestamp(), $action_date->getTimestamp() );
+	}
+
+	public function test_retrieve_action() {
+		$time = as_get_datetime_object();
+		$schedule = new ActionScheduler_SimpleSchedule($time);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule, 'my_group');
+		$store = new ActionScheduler_wpPostStore();
+		$action_id = $store->save_action($action);
+
+		$retrieved = $store->fetch_action($action_id);
+		$this->assertEquals($action->get_hook(), $retrieved->get_hook());
+		$this->assertEqualSets($action->get_args(), $retrieved->get_args());
+		$this->assertEquals($action->get_schedule()->next()->getTimestamp(), $retrieved->get_schedule()->next()->getTimestamp());
+		$this->assertEquals($action->get_group(), $retrieved->get_group());
+	}
+
+	/**
+	 * @expectedException ActionScheduler_InvalidActionException
+	 * @dataProvider provide_bad_args
+	 *
+	 * @param string $content
+	 */
+	public function test_action_bad_args( $content ) {
+		$store   = new ActionScheduler_wpPostStore();
+		$post_id = wp_insert_post( array(
+			'post_type'    => ActionScheduler_wpPostStore::POST_TYPE,
+			'post_status'  => ActionScheduler_Store::STATUS_PENDING,
+			'post_content' => $content,
+		) );
+
+		$store->fetch_action( $post_id );
+	}
+
+	public function provide_bad_args() {
+		return array(
+			array( '{"bad_json":true}}' ),
+		);
+	}
+
+	public function test_cancel_action() {
+		$time = as_get_datetime_object();
+		$schedule = new ActionScheduler_SimpleSchedule($time);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule, 'my_group');
+		$store = new ActionScheduler_wpPostStore();
+		$action_id = $store->save_action($action);
+		$store->cancel_action( $action_id );
+
+		$fetched = $store->fetch_action( $action_id );
+		$this->assertInstanceOf( 'ActionScheduler_CanceledAction', $fetched );
+	}
+
+	public function test_claim_actions() {
+		$created_actions = array();
+		$store = new ActionScheduler_wpPostStore();
+		for ( $i = 3 ; $i > -3 ; $i-- ) {
+			$time = as_get_datetime_object($i.' hours');
+			$schedule = new ActionScheduler_SimpleSchedule($time);
+			$action = new ActionScheduler_Action('my_hook', array($i), $schedule, 'my_group');
+			$created_actions[] = $store->save_action($action);
+		}
+
+		$claim = $store->stake_claim();
+		$this->assertInstanceof( 'ActionScheduler_ActionClaim', $claim );
+
+		$this->assertCount( 3, $claim->get_actions() );
+		$this->assertEqualSets( array_slice( $created_actions, 3, 3 ), $claim->get_actions() );
+	}
+
+	public function test_claim_actions_order() {
+		$store           = new ActionScheduler_wpPostStore();
+		$schedule        = new ActionScheduler_SimpleSchedule( as_get_datetime_object( '-1 hour' ) );
+		$created_actions = array(
+			$store->save_action( new ActionScheduler_Action( 'my_hook', array( 1 ), $schedule, 'my_group' ) ),
+			$store->save_action( new ActionScheduler_Action( 'my_hook', array( 1 ), $schedule, 'my_group' ) ),
+		);
+
+		$claim = $store->stake_claim();
+		$this->assertInstanceof( 'ActionScheduler_ActionClaim', $claim );
+
+		// Verify uniqueness of action IDs.
+		$this->assertEquals( 2, count( array_unique( $created_actions ) ) );
+
+		// Verify the count and order of the actions.
+		$claimed_actions = $claim->get_actions();
+		$this->assertCount( 2, $claimed_actions );
+		$this->assertEquals( $created_actions, $claimed_actions );
+
+		// Verify the reversed order doesn't pass.
+		$reversed_actions = array_reverse( $created_actions );
+		$this->assertNotEquals( $reversed_actions, $claimed_actions );
+	}
+
+	public function test_duplicate_claim() {
+		$created_actions = array();
+		$store = new ActionScheduler_wpPostStore();
+		for ( $i = 0 ; $i > -3 ; $i-- ) {
+			$time = as_get_datetime_object($i.' hours');
+			$schedule = new ActionScheduler_SimpleSchedule($time);
+			$action = new ActionScheduler_Action('my_hook', array($i), $schedule, 'my_group');
+			$created_actions[] = $store->save_action($action);
+		}
+
+		$claim1 = $store->stake_claim();
+		$claim2 = $store->stake_claim();
+		$this->assertCount( 3, $claim1->get_actions() );
+		$this->assertCount( 0, $claim2->get_actions() );
+	}
+
+	public function test_release_claim() {
+		$created_actions = array();
+		$store = new ActionScheduler_wpPostStore();
+		for ( $i = 0 ; $i > -3 ; $i-- ) {
+			$time = as_get_datetime_object($i.' hours');
+			$schedule = new ActionScheduler_SimpleSchedule($time);
+			$action = new ActionScheduler_Action('my_hook', array($i), $schedule, 'my_group');
+			$created_actions[] = $store->save_action($action);
+		}
+
+		$claim1 = $store->stake_claim();
+
+		$store->release_claim( $claim1 );
+
+		$claim2 = $store->stake_claim();
+		$this->assertCount( 3, $claim2->get_actions() );
+	}
+
+	public function test_search() {
+		$created_actions = array();
+		$store = new ActionScheduler_wpPostStore();
+		for ( $i = -3 ; $i <= 3 ; $i++ ) {
+			$time = as_get_datetime_object($i.' hours');
+			$schedule = new ActionScheduler_SimpleSchedule($time);
+			$action = new ActionScheduler_Action('my_hook', array($i), $schedule, 'my_group');
+			$created_actions[] = $store->save_action($action);
+		}
+
+		$next_no_args = $store->find_action( 'my_hook' );
+		$this->assertEquals( $created_actions[0], $next_no_args );
+
+		$next_with_args = $store->find_action( 'my_hook', array( 'args' => array( 1 ) ) );
+		$this->assertEquals( $created_actions[4], $next_with_args );
+
+		$non_existent = $store->find_action( 'my_hook', array( 'args' => array( 17 ) ) );
+		$this->assertNull( $non_existent );
+	}
+
+	public function test_search_by_group() {
+		$store = new ActionScheduler_wpPostStore();
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('tomorrow'));
+		$abc = $store->save_action(new ActionScheduler_Action('my_hook', array(1), $schedule, 'abc'));
+		$def = $store->save_action(new ActionScheduler_Action('my_hook', array(1), $schedule, 'def'));
+		$ghi = $store->save_action(new ActionScheduler_Action('my_hook', array(1), $schedule, 'ghi'));
+
+		$this->assertEquals( $abc, $store->find_action('my_hook', array('group' => 'abc')));
+		$this->assertEquals( $def, $store->find_action('my_hook', array('group' => 'def')));
+		$this->assertEquals( $ghi, $store->find_action('my_hook', array('group' => 'ghi')));
+	}
+
+	public function test_post_author() {
+		$current_user = get_current_user_id();
+
+		$time = as_get_datetime_object();
+		$schedule = new ActionScheduler_SimpleSchedule($time);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule);
+		$store = new ActionScheduler_wpPostStore();
+		$action_id = $store->save_action($action);
+
+		$post = get_post($action_id);
+		$this->assertEquals(0, $post->post_author);
+
+		$new_user = $this->factory->user->create_object(array(
+			'user_login' => __FUNCTION__,
+			'user_pass' => md5(rand()),
+		));
+		wp_set_current_user( $new_user );
+
+
+		$schedule = new ActionScheduler_SimpleSchedule($time);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule);
+		$action_id = $store->save_action($action);
+		$post = get_post($action_id);
+		$this->assertEquals(0, $post->post_author);
+
+		wp_set_current_user($current_user);
+	}
+
+	/**
+	 * @issue 13
+	 */
+	public function test_post_status_for_recurring_action() {
+		$time = as_get_datetime_object('10 minutes');
+		$schedule = new ActionScheduler_IntervalSchedule($time, HOUR_IN_SECONDS);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule);
+		$store = new ActionScheduler_wpPostStore();
+		$action_id = $store->save_action($action);
+
+		$action = $store->fetch_action($action_id);
+		$action->execute();
+		$store->mark_complete( $action_id );
+
+		$next = $action->get_schedule()->next( as_get_datetime_object() );
+		$new_action_id = $store->save_action( $action, $next );
+
+		$this->assertEquals('publish', get_post_status($action_id));
+		$this->assertEquals('pending', get_post_status($new_action_id));
+	}
+
+	public function test_get_run_date() {
+		$time = as_get_datetime_object('-10 minutes');
+		$schedule = new ActionScheduler_IntervalSchedule($time, HOUR_IN_SECONDS);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule);
+		$store = new ActionScheduler_wpPostStore();
+		$action_id = $store->save_action($action);
+
+		$this->assertEquals( $store->get_date($action_id)->getTimestamp(), $time->getTimestamp() );
+
+		$action = $store->fetch_action($action_id);
+		$action->execute();
+		$now = as_get_datetime_object();
+		$store->mark_complete( $action_id );
+
+		$this->assertEquals( $store->get_date($action_id)->getTimestamp(), $now->getTimestamp() );
+
+		$next = $action->get_schedule()->next( $now );
+		$new_action_id = $store->save_action( $action, $next );
+
+		$this->assertEquals( (int)($now->getTimestamp()) + HOUR_IN_SECONDS, $store->get_date($new_action_id)->getTimestamp() );
+	}
+
+	public function test_get_status() {
+		$time = as_get_datetime_object('-10 minutes');
+		$schedule = new ActionScheduler_IntervalSchedule($time, HOUR_IN_SECONDS);
+		$action = new ActionScheduler_Action('my_hook', array(), $schedule);
+		$store = new ActionScheduler_wpPostStore();
+		$action_id = $store->save_action($action);
+
+		$this->assertEquals( ActionScheduler_Store::STATUS_PENDING, $store->get_status( $action_id ) );
+
+		$store->mark_complete( $action_id );
+		$this->assertEquals( ActionScheduler_Store::STATUS_COMPLETE, $store->get_status( $action_id ) );
+
+		$store->mark_failure( $action_id );
+		$this->assertEquals( ActionScheduler_Store::STATUS_FAILED, $store->get_status( $action_id ) );
+	}
+
+	public function test_claim_actions_by_hooks() {
+		$hook1    = __FUNCTION__ . '_hook_1';
+		$hook2    = __FUNCTION__ . '_hook_2';
+		$store    = new ActionScheduler_wpPostStore();
+		$schedule = new ActionScheduler_SimpleSchedule( as_get_datetime_object( '-1 hour' ) );
+
+		$action1 = $store->save_action( new ActionScheduler_Action( $hook1, array(), $schedule ) );
+		$action2 = $store->save_action( new ActionScheduler_Action( $hook2, array(), $schedule ) );
+
+		// Claiming no hooks should include all actions.
+		$claim = $store->stake_claim( 10 );
+		$this->assertEquals( 2, count( $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action1, $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action2, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+
+		// Claiming a hook should claim only actions with that hook
+		$claim = $store->stake_claim( 10, null, array( $hook1 ) );
+		$this->assertEquals( 1, count( $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action1, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+
+		// Claiming two hooks should claim actions with either of those hooks
+		$claim = $store->stake_claim( 10, null, array( $hook1, $hook2 ) );
+		$this->assertEquals( 2, count( $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action1, $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action2, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+
+		// Claiming two hooks should claim actions with either of those hooks
+		$claim = $store->stake_claim( 10, null, array( __METHOD__ . '_hook_3' ) );
+		$this->assertEquals( 0, count( $claim->get_actions() ) );
+		$this->assertFalse( in_array( $action1, $claim->get_actions() ) );
+		$this->assertFalse( in_array( $action2, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+	}
+
+	/**
+	 * @issue 121
+	 */
+	public function test_claim_actions_by_group() {
+		$group1   = md5( rand() );
+		$store    = new ActionScheduler_wpPostStore();
+		$schedule = new ActionScheduler_SimpleSchedule( as_get_datetime_object( '-1 hour' ) );
+
+		$action1 = $store->save_action( new ActionScheduler_Action( __METHOD__, array(), $schedule, $group1 ) );
+		$action2 = $store->save_action( new ActionScheduler_Action( __METHOD__, array(), $schedule ) );
+
+		// Claiming no group should include all actions.
+		$claim = $store->stake_claim( 10 );
+		$this->assertEquals( 2, count( $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action1, $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action2, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+
+		// Claiming a group should claim only actions in that group.
+		$claim = $store->stake_claim( 10, null, array(), $group1 );
+		$this->assertEquals( 1, count( $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action1, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+	}
+
+	public function test_claim_actions_by_hook_and_group() {
+		$hook1    = __FUNCTION__ . '_hook_1';
+		$hook2    = __FUNCTION__ . '_hook_2';
+		$hook3    = __FUNCTION__ . '_hook_3';
+		$group1   = 'group_' . md5( rand() );
+		$group2   = 'group_' . md5( rand() );
+		$store    = new ActionScheduler_wpPostStore();
+		$schedule = new ActionScheduler_SimpleSchedule( as_get_datetime_object( '-1 hour' ) );
+
+		$action1 = $store->save_action( new ActionScheduler_Action( $hook1, array(), $schedule, $group1 ) );
+		$action2 = $store->save_action( new ActionScheduler_Action( $hook2, array(), $schedule ) );
+		$action3 = $store->save_action( new ActionScheduler_Action( $hook3, array(), $schedule, $group2 ) );
+
+		// Claiming no hooks or group should include all actions.
+		$claim = $store->stake_claim( 10 );
+		$this->assertEquals( 3, count( $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action1, $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action2, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+
+		// Claiming a group and hook should claim only actions in that group.
+		$claim = $store->stake_claim( 10, null, array( $hook1 ), $group1 );
+		$this->assertEquals( 1, count( $claim->get_actions() ) );
+		$this->assertTrue( in_array( $action1, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+
+		// Claiming a group and hook should claim only actions with that hook in that group.
+		$claim = $store->stake_claim( 10, null, array( $hook2 ), $group1 );
+		$this->assertEquals( 0, count( $claim->get_actions() ) );
+		$this->assertFalse( in_array( $action1, $claim->get_actions() ) );
+		$this->assertFalse( in_array( $action2, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+
+		// Claiming a group and hook should claim only actions with that hook in that group.
+		$claim = $store->stake_claim( 10, null, array( $hook1, $hook2 ), $group2 );
+		$this->assertEquals( 0, count( $claim->get_actions() ) );
+		$this->assertFalse( in_array( $action1, $claim->get_actions() ) );
+		$this->assertFalse( in_array( $action2, $claim->get_actions() ) );
+		$store->release_claim( $claim );
+	}
+}

tests/phpunit/logging/ActionScheduler_wpCommentLogger_Test.php

@@ -0,0 +1,185 @@
+<?php
+
+/**
+ * Class ActionScheduler_wpCommentLogger_Test
+ * @package test_cases\logging
+ */
+class ActionScheduler_wpCommentLogger_Test extends ActionScheduler_UnitTestCase {
+	public function test_default_logger() {
+		$logger = ActionScheduler::logger();
+		$this->assertInstanceOf( 'ActionScheduler_Logger', $logger );
+		$this->assertInstanceOf( 'ActionScheduler_wpCommentLogger', $logger );
+	}
+
+	public function test_add_log_entry() {
+		$action_id = as_schedule_single_action( time(), 'a hook' );
+		$logger = ActionScheduler::logger();
+		$message = 'Logging that something happened';
+		$log_id = $logger->log( $action_id, $message );
+		$entry = $logger->get_entry( $log_id );
+
+		$this->assertEquals( $action_id, $entry->get_action_id() );
+		$this->assertEquals( $message, $entry->get_message() );
+	}
+
+	public function test_add_log_datetime() {
+		$action_id = as_schedule_single_action( time(), 'a hook' );
+		$logger    = ActionScheduler::logger();
+		$message   = 'Logging that something happened';
+		$date      = new DateTime( 'now', new DateTimeZone( 'UTC' ) );
+		$log_id    = $logger->log( $action_id, $message, $date );
+		$entry     = $logger->get_entry( $log_id );
+
+		$this->assertEquals( $action_id, $entry->get_action_id() );
+		$this->assertEquals( $message, $entry->get_message() );
+
+		$date      = new ActionScheduler_DateTime( 'now', new DateTimeZone( 'UTC' ) );
+		$log_id    = $logger->log( $action_id, $message, $date );
+		$entry     = $logger->get_entry( $log_id );
+
+		$this->assertEquals( $action_id, $entry->get_action_id() );
+		$this->assertEquals( $message, $entry->get_message() );
+	}
+
+	public function test_null_log_entry() {
+		$logger = ActionScheduler::logger();
+		$entry = $logger->get_entry( 1 );
+		$this->assertEquals( '', $entry->get_action_id() );
+		$this->assertEquals( '', $entry->get_message() );
+	}
+
+	public function test_erroneous_entry_id() {
+		$comment = wp_insert_comment(array(
+			'comment_post_ID' => 1,
+			'comment_author' => 'test',
+			'comment_content' => 'this is not a log entry',
+		));
+		$logger = ActionScheduler::logger();
+		$entry = $logger->get_entry( $comment );
+		$this->assertEquals( '', $entry->get_action_id() );
+		$this->assertEquals( '', $entry->get_message() );
+	}
+
+	public function test_storage_comments() {
+		$action_id = as_schedule_single_action( time(), 'a hook' );
+		$logger = ActionScheduler::logger();
+		$logs = $logger->get_logs( $action_id );
+		$expected = new ActionScheduler_LogEntry( $action_id, 'action created' );
+		$this->assertTrue( in_array( $this->log_entry_to_array( $expected ) , $this->log_entry_to_array( $logs ) ) );
+	}
+
+	protected function log_entry_to_array( $logs ) {
+		if ( $logs instanceof ActionScheduler_LogEntry ) {
+			return array( 'action_id' => $logs->get_action_id(), 'message' => $logs->get_message() );
+		}
+
+		foreach ( $logs as $id => $log) {
+			$logs[ $id ] = array( 'action_id' => $log->get_action_id(), 'message' => $log->get_message() );
+		}
+
+		return $logs;
+	}
+
+	public function test_execution_comments() {
+		$action_id = as_schedule_single_action( time(), 'a hook' );
+		$logger = ActionScheduler::logger();
+		$started = new ActionScheduler_LogEntry( $action_id, 'action started' );
+		$finished = new ActionScheduler_LogEntry( $action_id, 'action complete' );
+
+		$runner = new ActionScheduler_QueueRunner();
+		$runner->run();
+
+		$logs = $logger->get_logs( $action_id );
+		$this->assertTrue( in_array( $this->log_entry_to_array( $started ), $this->log_entry_to_array( $logs ) ) );
+		$this->assertTrue( in_array( $this->log_entry_to_array( $finished ), $this->log_entry_to_array( $logs ) ) );
+	}
+
+	public function test_failed_execution_comments() {
+		$hook = md5(rand());
+		add_action( $hook, array( $this, '_a_hook_callback_that_throws_an_exception' ) );
+		$action_id = as_schedule_single_action( time(), $hook );
+		$logger = ActionScheduler::logger();
+		$started = new ActionScheduler_LogEntry( $action_id, 'action started' );
+		$finished = new ActionScheduler_LogEntry( $action_id, 'action complete' );
+		$failed = new ActionScheduler_LogEntry( $action_id, 'action failed: Execution failed' );
+
+		$runner = new ActionScheduler_QueueRunner();
+		$runner->run();
+
+		$logs = $logger->get_logs( $action_id );
+		$this->assertTrue( in_array( $this->log_entry_to_array( $started ), $this->log_entry_to_array( $logs ) ) );
+		$this->assertFalse( in_array( $this->log_entry_to_array( $finished ), $this->log_entry_to_array( $logs ) ) );
+		$this->assertTrue( in_array( $this->log_entry_to_array( $failed ), $this->log_entry_to_array( $logs ) ) );
+	}
+
+	public function test_fatal_error_comments() {
+		$hook = md5(rand());
+		$action_id = as_schedule_single_action( time(), $hook );
+		$logger = ActionScheduler::logger();
+		do_action( 'action_scheduler_unexpected_shutdown', $action_id, array(
+			'type' => E_ERROR,
+			'message' => 'Test error',
+			'file' => __FILE__,
+			'line' => __LINE__,
+		));
+
+		$logs = $logger->get_logs( $action_id );
+		$found_log = FALSE;
+		foreach ( $logs as $l ) {
+			if ( strpos( $l->get_message(), 'unexpected shutdown' ) === 0 ) {
+				$found_log = TRUE;
+			}
+		}
+		$this->assertTrue( $found_log, 'Unexpected shutdown log not found' );
+	}
+
+	public function test_canceled_action_comments() {
+		$action_id = as_schedule_single_action( time(), 'a hook' );
+		as_unschedule_action( 'a hook' );
+		$logger = ActionScheduler::logger();
+		$logs = $logger->get_logs( $action_id );
+		$expected = new ActionScheduler_LogEntry( $action_id, 'action canceled' );
+		$this->assertTrue( in_array( $this->log_entry_to_array( $expected ), $this->log_entry_to_array( $logs ) ) );
+	}
+
+	public function _a_hook_callback_that_throws_an_exception() {
+		throw new RuntimeException('Execution failed');
+	}
+
+	public function test_filtering_of_get_comments() {
+		$post_id = $this->factory->post->create_object(array(
+			'post_title' => __FUNCTION__,
+		));
+		$comment_id = $this->factory->comment->create_object(array(
+			'comment_post_ID' => $post_id,
+			'comment_author' => __CLASS__,
+			'comment_content' => __FUNCTION__,
+		));
+
+		// Verify that we're getting the expected comment before we add logging comments
+		$comments = get_comments();
+		$this->assertCount( 1, $comments );
+		$this->assertEquals( $comment_id, $comments[0]->comment_ID );
+
+
+		$action_id = as_schedule_single_action( time(), 'a hook' );
+		$logger = ActionScheduler::logger();
+		$message = 'Logging that something happened';
+		$log_id = $logger->log( $action_id, $message );
+
+
+		// Verify that logging comments are excluded from general comment queries
+		$comments = get_comments();
+		$this->assertCount( 1, $comments );
+		$this->assertEquals( $comment_id, $comments[0]->comment_ID );
+
+		// Verify that logging comments are returned when asking for them specifically
+		$comments = get_comments(array(
+			'type' => ActionScheduler_wpCommentLogger::TYPE,
+		));
+		// Expecting two: one when the action is created, another when we added our custom log
+		$this->assertCount( 2, $comments );
+		$this->assertContains( $log_id, wp_list_pluck($comments, 'comment_ID'));
+	}
+}
+ 

tests/phpunit/procedural_api/procedural_api_Test.php

@@ -0,0 +1,222 @@
+<?php
+
+/**
+ * Class procedural_api_Test
+ */
+class procedural_api_Test extends ActionScheduler_UnitTestCase {
+
+	public function test_schedule_action() {
+		$time = time();
+		$hook = md5(rand());
+		$action_id = as_schedule_single_action( $time, $hook );
+
+		$store = ActionScheduler::store();
+		$action = $store->fetch_action($action_id);
+		$this->assertEquals( $time, $action->get_schedule()->next()->getTimestamp() );
+		$this->assertEquals( $hook, $action->get_hook() );
+	}
+
+	public function test_recurring_action() {
+		$time = time();
+		$hook = md5(rand());
+		$action_id = as_schedule_recurring_action( $time, HOUR_IN_SECONDS, $hook );
+
+		$store = ActionScheduler::store();
+		$action = $store->fetch_action($action_id);
+		$this->assertEquals( $time, $action->get_schedule()->next()->getTimestamp() );
+		$this->assertEquals( $time + HOUR_IN_SECONDS + 2, $action->get_schedule()->next(as_get_datetime_object($time + 2))->getTimestamp());
+		$this->assertEquals( $hook, $action->get_hook() );
+	}
+
+	public function test_cron_schedule() {
+		$time = as_get_datetime_object('2014-01-01');
+		$hook = md5(rand());
+		$action_id = as_schedule_cron_action( $time->getTimestamp(), '0 0 10 10 *', $hook );
+
+		$store = ActionScheduler::store();
+		$action = $store->fetch_action($action_id);
+		$expected_date = as_get_datetime_object('2014-10-10');
+		$this->assertEquals( $expected_date->getTimestamp(), $action->get_schedule()->next()->getTimestamp() );
+		$this->assertEquals( $hook, $action->get_hook() );
+	}
+
+	public function test_get_next() {
+		$time = as_get_datetime_object('tomorrow');
+		$hook = md5(rand());
+		as_schedule_recurring_action( $time->getTimestamp(), HOUR_IN_SECONDS, $hook );
+
+		$next = as_next_scheduled_action( $hook );
+
+		$this->assertEquals( $time->getTimestamp(), $next );
+	}
+
+	public function provider_time_hook_args_group() {
+		$time  = time() + 60 * 2;
+		$hook  = md5( rand() );
+		$args  = array( rand(), rand() );
+		$group = 'test_group';
+
+		return array(
+
+			// Test with no args or group
+			array(
+				'time'  => $time,
+				'hook'  => $hook,
+				'args'  => array(),
+				'group' => '',
+			),
+
+			// Test with args but no group
+			array(
+				'time'  => $time,
+				'hook'  => $hook,
+				'args'  => $args,
+				'group' => '',
+			),
+
+			// Test with group but no args
+			array(
+				'time'  => $time,
+				'hook'  => $hook,
+				'args'  => array(),
+				'group' => $group,
+			),
+
+			// Test with args & group
+			array(
+				'time'  => $time,
+				'hook'  => $hook,
+				'args'  => $args,
+				'group' => $group,
+			),
+		);
+	}
+
+	/**
+	 * @dataProvider provider_time_hook_args_group
+	 */
+	public function test_unschedule( $time, $hook, $args, $group ) {
+
+		$action_id_unscheduled = as_schedule_single_action( $time, $hook, $args, $group );
+		$action_scheduled_time = $time + 1;
+		$action_id_scheduled   = as_schedule_single_action( $action_scheduled_time, $hook, $args, $group );
+
+		as_unschedule_action( $hook, $args, $group );
+
+		$next = as_next_scheduled_action( $hook, $args, $group );
+		$this->assertEquals( $action_scheduled_time, $next );
+
+		$store = ActionScheduler::store();
+		$unscheduled_action = $store->fetch_action( $action_id_unscheduled );
+
+		// Make sure the next scheduled action is unscheduled
+		$this->assertEquals( $hook, $unscheduled_action->get_hook() );
+		$this->assertNull( $unscheduled_action->get_schedule()->next() );
+
+		// Make sure other scheduled actions are not unscheduled
+		$scheduled_action = $store->fetch_action( $action_id_scheduled );
+
+		$this->assertEquals( $hook, $scheduled_action->get_hook() );
+		$this->assertEquals( $action_scheduled_time, $scheduled_action->get_schedule()->next()->getTimestamp() );
+	}
+
+	/**
+	 * @dataProvider provider_time_hook_args_group
+	 */
+	public function test_unschedule_all( $time, $hook, $args, $group ) {
+
+		$hook       = md5( $hook );
+		$action_ids = array();
+
+		for ( $i = 0; $i < 3; $i++ ) {
+			$action_ids[] = as_schedule_single_action( $time, $hook, $args, $group );
+		}
+
+		as_unschedule_all_actions( $hook, $args, $group );
+
+		$next = as_next_scheduled_action( $hook );
+		$this->assertFalse($next);
+
+		$store = ActionScheduler::store();
+
+		foreach ( $action_ids as $action_id ) {
+			$action = $store->fetch_action($action_id);
+
+			$this->assertNull($action->get_schedule()->next());
+			$this->assertEquals($hook, $action->get_hook() );
+		}
+	}
+
+	public function test_as_get_datetime_object_default() {
+
+		$utc_now = new ActionScheduler_DateTime(null, new DateTimeZone('UTC'));
+		$as_now  = as_get_datetime_object();
+
+		// Don't want to use 'U' as timestamps will always be in UTC
+		$this->assertEquals($utc_now->format('Y-m-d H:i:s'),$as_now->format('Y-m-d H:i:s'));
+	}
+
+	public function test_as_get_datetime_object_relative() {
+
+		$utc_tomorrow = new ActionScheduler_DateTime('tomorrow', new DateTimeZone('UTC'));
+		$as_tomorrow  = as_get_datetime_object('tomorrow');
+
+		$this->assertEquals($utc_tomorrow->format('Y-m-d H:i:s'),$as_tomorrow->format('Y-m-d H:i:s'));
+
+		$utc_tomorrow = new ActionScheduler_DateTime('yesterday', new DateTimeZone('UTC'));
+		$as_tomorrow  = as_get_datetime_object('yesterday');
+
+		$this->assertEquals($utc_tomorrow->format('Y-m-d H:i:s'),$as_tomorrow->format('Y-m-d H:i:s'));
+	}
+
+	public function test_as_get_datetime_object_fixed() {
+
+		$utc_tomorrow = new ActionScheduler_DateTime('29 February 2016', new DateTimeZone('UTC'));
+		$as_tomorrow  = as_get_datetime_object('29 February 2016');
+
+		$this->assertEquals($utc_tomorrow->format('Y-m-d H:i:s'),$as_tomorrow->format('Y-m-d H:i:s'));
+
+		$utc_tomorrow = new ActionScheduler_DateTime('1st January 2024', new DateTimeZone('UTC'));
+		$as_tomorrow  = as_get_datetime_object('1st January 2024');
+
+		$this->assertEquals($utc_tomorrow->format('Y-m-d H:i:s'),$as_tomorrow->format('Y-m-d H:i:s'));
+	}
+
+	public function test_as_get_datetime_object_timezone() {
+
+		$timezone_au      = 'Australia/Brisbane';
+		$timezone_default = date_default_timezone_get();
+
+		date_default_timezone_set( $timezone_au );
+
+		$au_now = new ActionScheduler_DateTime(null);
+		$as_now = as_get_datetime_object();
+
+		// Make sure they're for the same time
+		$this->assertEquals($au_now->getTimestamp(),$as_now->getTimestamp());
+
+		// But not in the same timezone, as $as_now should be using UTC
+		$this->assertNotEquals($au_now->format('Y-m-d H:i:s'),$as_now->format('Y-m-d H:i:s'));
+
+		$au_now    = new ActionScheduler_DateTime(null);
+		$as_au_now = as_get_datetime_object();
+
+		$this->assertEquals($au_now->getTimestamp(),$as_now->getTimestamp());
+
+		// But not in the same timezone, as $as_now should be using UTC
+		$this->assertNotEquals($au_now->format('Y-m-d H:i:s'),$as_now->format('Y-m-d H:i:s'));
+
+		// Just in cases
+		date_default_timezone_set( $timezone_default );
+	}
+
+	public function test_as_get_datetime_object_type() {
+		$f   = 'Y-m-d H:i:s';
+		$now = as_get_datetime_object();
+		$this->assertInstanceOf( 'ActionScheduler_DateTime', $now );
+
+		$dateTime   = new DateTime( 'now', new DateTimeZone( 'UTC' ) );
+		$asDateTime = as_get_datetime_object( $dateTime );
+		$this->assertEquals( $dateTime->format( $f ), $asDateTime->format( $f ) );
+	}
+}

tests/phpunit/procedural_api/wc_get_scheduled_actions_Test.php

@@ -0,0 +1,100 @@
+<?php
+
+/**
+ * Class as_get_scheduled_actions_Test
+ */
+class as_get_scheduled_actions_Test extends ActionScheduler_UnitTestCase {
+	private $hooks = array();
+	private $args = array();
+	private $groups = array();
+
+	public function setUp() {
+		parent::setUp();
+
+		$store = ActionScheduler::store();
+
+		for ( $i = 0 ; $i < 10 ; $i++ ) {
+			$this->hooks[$i] = md5(rand());
+			$this->args[$i] = md5(rand());
+			$this->groups[$i] = md5(rand());
+		}
+
+		for ( $i = 0 ; $i < 10 ; $i++ ) {
+			for ( $j = 0 ; $j < 10 ; $j++  ) {
+				$schedule = new ActionScheduler_SimpleSchedule( as_get_datetime_object( $j - 3 . 'days') );
+				$group = $this->groups[ ( $i + $j ) % 10 ];
+				$action = new ActionScheduler_Action( $this->hooks[$i], array($this->args[$j]), $schedule, $group );
+				$store->save_action( $action );
+			}
+		}
+	}
+
+	public function test_date_queries() {
+		$actions = as_get_scheduled_actions(array(
+			'date' => as_get_datetime_object(gmdate('Y-m-d 00:00:00')),
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(30, $actions);
+
+		$actions = as_get_scheduled_actions(array(
+			'date' => as_get_datetime_object(gmdate('Y-m-d 00:00:00')),
+			'date_compare' => '>=',
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(70, $actions);
+	}
+
+	public function test_hook_queries() {
+		$actions = as_get_scheduled_actions(array(
+			'hook' => $this->hooks[2],
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(10, $actions);
+
+		$actions = as_get_scheduled_actions(array(
+			'hook' => $this->hooks[2],
+			'date' => as_get_datetime_object(gmdate('Y-m-d 00:00:00')),
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(3, $actions);
+	}
+
+	public function test_args_queries() {
+		$actions = as_get_scheduled_actions(array(
+			'args' => array($this->args[5]),
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(10, $actions);
+
+		$actions = as_get_scheduled_actions(array(
+			'args' => array($this->args[5]),
+			'hook' => $this->hooks[3],
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(1, $actions);
+
+		$actions = as_get_scheduled_actions(array(
+			'args' => array($this->args[5]),
+			'hook' => $this->hooks[3],
+			'date' => as_get_datetime_object(gmdate('Y-m-d 00:00:00')),
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(0, $actions);
+	}
+
+	public function test_group_queries() {
+		$actions = as_get_scheduled_actions(array(
+			'group' => $this->groups[1],
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(10, $actions);
+
+		$actions = as_get_scheduled_actions(array(
+			'group' => $this->groups[1],
+			'hook' => $this->hooks[9],
+			'per_page' => -1,
+		), 'ids');
+		$this->assertCount(1, $actions);
+	}
+}
+ 

tests/phpunit/runner/ActionScheduler_QueueCleaner_Test.php

@@ -0,0 +1,151 @@
+<?php
+
+/**
+ * Class ActionScheduler_QueueCleaner_Test
+ */
+class ActionScheduler_QueueCleaner_Test extends ActionScheduler_UnitTestCase {
+
+	public function test_delete_old_actions() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+
+		$random = md5(rand());
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('1 day ago'));
+
+		$created_actions = array();
+		for ( $i = 0 ; $i < 5 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$created_actions[] = $store->save_action( $action );
+		}
+
+		$runner->run();
+
+		add_filter( 'action_scheduler_retention_period', '__return_zero' ); // delete any finished job
+		$cleaner = new ActionScheduler_QueueCleaner( $store );
+		$cleaner->delete_old_actions();
+		remove_filter( 'action_scheduler_retention_period', '__return_zero' );
+
+		foreach ( $created_actions as $action_id ) {
+			$action = $store->fetch_action($action_id);
+			$this->assertFalse($action->is_finished()); // it's a NullAction
+		}
+	}
+
+	public function test_delete_canceled_actions() {
+		$store = ActionScheduler::store();
+
+		$random = md5(rand());
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('1 day ago'));
+
+		$created_actions = array();
+		for ( $i = 0 ; $i < 5 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$action_id = $store->save_action( $action );
+			$store->cancel_action( $action_id );
+			$created_actions[] = $action_id;
+		}
+
+		// track the actions that are deleted
+		$mock_action = new MockAction();
+		add_action( 'action_scheduler_deleted_action', array( $mock_action, 'action' ), 10, 1 );
+		add_filter( 'action_scheduler_retention_period', '__return_zero' ); // delete any finished job
+
+		$cleaner = new ActionScheduler_QueueCleaner( $store );
+		$cleaner->delete_old_actions();
+
+		remove_filter( 'action_scheduler_retention_period', '__return_zero' );
+		remove_action( 'action_scheduler_deleted_action', array( $mock_action, 'action' ), 10 );
+
+		$deleted_actions = array_map( 'reset', $mock_action->get_args() );
+		$this->assertEqualSets( $created_actions, $deleted_actions );
+	}
+
+	public function test_do_not_delete_recent_actions() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+
+		$random = md5(rand());
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('1 day ago'));
+
+		$created_actions = array();
+		for ( $i = 0 ; $i < 5 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$created_actions[] = $store->save_action( $action );
+		}
+
+		$runner->run();
+
+		$cleaner = new ActionScheduler_QueueCleaner( $store );
+		$cleaner->delete_old_actions();
+
+		foreach ( $created_actions as $action_id ) {
+			$action = $store->fetch_action($action_id);
+			$this->assertTrue($action->is_finished()); // It's a FinishedAction
+		}
+	}
+
+	public function test_reset_unrun_actions() {
+		$store = ActionScheduler::store();
+
+		$random = md5(rand());
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('1 day ago'));
+
+		$created_actions = array();
+		for ( $i = 0 ; $i < 5 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$created_actions[] = $store->save_action( $action );
+		}
+
+		$store->stake_claim(10);
+
+		// don't actually process the jobs, to simulate a request that timed out
+
+		add_filter( 'action_scheduler_timeout_period', '__return_zero' ); // delete any finished job
+		$cleaner = new ActionScheduler_QueueCleaner( $store );
+		$cleaner->reset_timeouts();
+
+		remove_filter( 'action_scheduler_timeout_period', '__return_zero' );
+
+		$claim = $store->stake_claim(10);
+		$this->assertEqualSets($created_actions, $claim->get_actions());
+	}
+
+	public function test_do_not_reset_failed_action() {
+		$store = ActionScheduler::store();
+
+		$random = md5(rand());
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('1 day ago'));
+
+		$created_actions = array();
+		for ( $i = 0 ; $i < 5 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$created_actions[] = $store->save_action( $action );
+		}
+
+		$claim = $store->stake_claim(10);
+		foreach ( $claim->get_actions() as $action_id ) {
+			// simulate the first action interrupted by an uncatchable fatal error
+			$store->log_execution( $action_id );
+			break;
+		}
+
+		add_filter( 'action_scheduler_timeout_period', '__return_zero' ); // delete any finished job
+		$cleaner = new ActionScheduler_QueueCleaner( $store );
+		$cleaner->reset_timeouts();
+		remove_filter( 'action_scheduler_timeout_period', '__return_zero' );
+
+		$new_claim = $store->stake_claim(10);
+		$this->assertCount( 4, $new_claim->get_actions() );
+
+		add_filter( 'action_scheduler_failure_period', '__return_zero' );
+		$cleaner->mark_failures();
+		remove_filter( 'action_scheduler_failure_period', '__return_zero' );
+
+		$failed = $store->query_actions(array('status' => ActionScheduler_Store::STATUS_FAILED));
+		$this->assertEquals( $created_actions[0], $failed[0] );
+		$this->assertCount( 1, $failed );
+
+
+	}
+}
+ 

tests/phpunit/runner/ActionScheduler_QueueRunner_Test.php

@@ -0,0 +1,262 @@
+<?php
+
+/**
+ * Class ActionScheduler_QueueRunner_Test
+ * @group runners
+ */
+class ActionScheduler_QueueRunner_Test extends ActionScheduler_UnitTestCase {
+	public function test_create_runner() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+		$actions_run = $runner->run();
+
+		$this->assertEquals( 0, $actions_run );
+	}
+
+	public function test_run() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+
+		$mock = new MockAction();
+		$random = md5(rand());
+		add_action( $random, array( $mock, 'action' ) );
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('1 day ago'));
+
+		for ( $i = 0 ; $i < 5 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$store->save_action( $action );
+		}
+
+		$actions_run = $runner->run();
+
+		remove_action( $random, array( $mock, 'action' ) );
+
+		$this->assertEquals( 5, $mock->get_call_count() );
+		$this->assertEquals( 5, $actions_run );
+	}
+
+	public function test_run_with_future_actions() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+
+		$mock = new MockAction();
+		$random = md5(rand());
+		add_action( $random, array( $mock, 'action' ) );
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('1 day ago'));
+
+		for ( $i = 0 ; $i < 3 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$store->save_action( $action );
+		}
+
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('tomorrow'));
+		for ( $i = 0 ; $i < 3 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$store->save_action( $action );
+		}
+
+		$actions_run = $runner->run();
+
+		remove_action( $random, array( $mock, 'action' ) );
+
+		$this->assertEquals( 3, $mock->get_call_count() );
+		$this->assertEquals( 3, $actions_run );
+	}
+
+	public function test_completed_action_status() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+
+		$random = md5(rand());
+		$schedule = new ActionScheduler_SimpleSchedule(as_get_datetime_object('12 hours ago'));
+
+		$action = new ActionScheduler_Action( $random, array(), $schedule );
+		$action_id = $store->save_action( $action );
+
+		$runner->run();
+
+		$finished_action = $store->fetch_action( $action_id );
+
+		$this->assertTrue( $finished_action->is_finished() );
+	}
+
+	public function test_next_instance_of_action() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+
+		$random = md5(rand());
+		$schedule = new ActionScheduler_IntervalSchedule(as_get_datetime_object('12 hours ago'), DAY_IN_SECONDS);
+
+		$action = new ActionScheduler_Action( $random, array(), $schedule );
+		$store->save_action( $action );
+
+		$runner->run();
+
+		$claim = $store->stake_claim(10, as_get_datetime_object((DAY_IN_SECONDS - 60).' seconds'));
+		$this->assertCount(0, $claim->get_actions());
+
+		$claim = $store->stake_claim(10, as_get_datetime_object(DAY_IN_SECONDS.' seconds'));
+		$actions = $claim->get_actions();
+		$this->assertCount(1, $actions);
+
+		$action_id = reset($actions);
+		$new_action = $store->fetch_action($action_id);
+
+
+		$this->assertEquals( $random, $new_action->get_hook() );
+		$this->assertEquals( $schedule->next(as_get_datetime_object())->getTimestamp(), $new_action->get_schedule()->next(as_get_datetime_object())->getTimestamp() );
+	}
+
+	public function test_hooked_into_wp_cron() {
+		$next = wp_next_scheduled( ActionScheduler_QueueRunner::WP_CRON_HOOK );
+		$this->assertNotEmpty($next);
+	}
+
+	public function test_batch_count_limit() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+
+		$mock = new MockAction();
+		$random = md5(rand());
+		add_action( $random, array( $mock, 'action' ) );
+		$schedule = new ActionScheduler_SimpleSchedule(new ActionScheduler_DateTime('1 day ago'));
+
+		for ( $i = 0 ; $i < 30 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$store->save_action( $action );
+		}
+
+		$claims = array();
+
+		for ( $i = 0 ; $i < 5 ; $i++ ) {
+			$claims[] = $store->stake_claim( 5 );
+		}
+
+		$actions_run = $runner->run();
+
+
+		$this->assertEquals( 0, $mock->get_call_count() );
+		$this->assertEquals( 0, $actions_run );
+
+		$first = reset($claims);
+		$store->release_claim( $first );
+
+		$actions_run = $runner->run();
+		$this->assertEquals( 10, $mock->get_call_count() );
+		$this->assertEquals( 10, $actions_run );
+
+		remove_action( $random, array( $mock, 'action' ) );
+	}
+
+	public function test_changing_batch_count_limit() {
+		$store = ActionScheduler::store();
+		$runner = new ActionScheduler_QueueRunner( $store );
+
+		$random = md5(rand());
+		$schedule = new ActionScheduler_SimpleSchedule(new ActionScheduler_DateTime('1 day ago'));
+
+		for ( $i = 0 ; $i < 30 ; $i++ ) {
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$store->save_action( $action );
+		}
+
+		$claims = array();
+
+		for ( $i = 0 ; $i < 5 ; $i++ ) {
+			$claims[] = $store->stake_claim( 5 );
+		}
+
+		$mock1 = new MockAction();
+		add_action( $random, array( $mock1, 'action' ) );
+		$actions_run = $runner->run();
+		remove_action( $random, array( $mock1, 'action' ) );
+
+		$this->assertEquals( 0, $mock1->get_call_count() );
+		$this->assertEquals( 0, $actions_run );
+
+
+		add_filter( 'action_scheduler_queue_runner_concurrent_batches', array( $this, 'return_6' ) );
+
+		$mock2 = new MockAction();
+		add_action( $random, array( $mock2, 'action' ) );
+		$actions_run = $runner->run();
+		remove_action( $random, array( $mock2, 'action' ) );
+
+		$this->assertEquals( 5, $mock2->get_call_count() );
+		$this->assertEquals( 5, $actions_run );
+
+		remove_filter( 'action_scheduler_queue_runner_concurrent_batches', array( $this, 'return_6' ) );
+
+		for ( $i = 0 ; $i < 5 ; $i++ ) { // to make up for the actions we just processed
+			$action = new ActionScheduler_Action( $random, array($random), $schedule );
+			$store->save_action( $action );
+		}
+
+		$mock3 = new MockAction();
+		add_action( $random, array( $mock3, 'action' ) );
+		$actions_run = $runner->run();
+		remove_action( $random, array( $mock3, 'action' ) );
+
+		$this->assertEquals( 0, $mock3->get_call_count() );
+		$this->assertEquals( 0, $actions_run );
+
+		remove_filter( 'action_scheduler_queue_runner_concurrent_batches', array( $this, 'return_6' ) );
+	}
+
+	public function return_6() {
+		return 6;
+	}
+
+	public function test_store_fetch_action_failure_schedule_next_instance() {
+		$random    = md5( rand() );
+		$schedule  = new ActionScheduler_IntervalSchedule( as_get_datetime_object( '12 hours ago' ), DAY_IN_SECONDS );
+		$action    = new ActionScheduler_Action( $random, array(), $schedule );
+		$action_id = ActionScheduler::store()->save_action( $action );
+
+		// Set up a mock store that will throw an exception when fetching actions.
+		$store = $this
+					->getMockBuilder( 'ActionScheduler_wpPostStore' )
+					->setMethods( array( 'fetch_action' ) )
+					->getMock();
+		$store
+			->method( 'fetch_action' )
+			->with( $action_id )
+			->will( $this->throwException( new Exception() ) );
+
+		// Set up a mock queue runner to verify that schedule_next_instance()
+		// isn't called for an undefined $action.
+		$runner = $this
+					->getMockBuilder( 'ActionScheduler_QueueRunner' )
+					->setConstructorArgs( array( $store ) )
+					->setMethods( array( 'schedule_next_instance' ) )
+					->getMock();
+		$runner
+			->expects( $this->never() )
+			->method( 'schedule_next_instance' );
+
+		$runner->run();
+
+		// Set up a mock store that will throw an exception when fetching actions.
+		$store2 = $this
+					->getMockBuilder( 'ActionScheduler_wpPostStore' )
+					->setMethods( array( 'fetch_action' ) )
+					->getMock();
+		$store2
+			->method( 'fetch_action' )
+			->with( $action_id )
+			->willReturn( null );
+
+		// Set up a mock queue runner to verify that schedule_next_instance()
+		// isn't called for an undefined $action.
+		$runner2 = $this
+					->getMockBuilder( 'ActionScheduler_QueueRunner' )
+					->setConstructorArgs( array( $store ) )
+					->setMethods( array( 'schedule_next_instance' ) )
+					->getMock();
+		$runner2
+			->expects( $this->never() )
+			->method( 'schedule_next_instance' );
+
+		$runner2->run();
+	}
+}

tests/phpunit/schedules/ActionScheduler_CronSchedule_Test.php

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * Class ActionScheduler_CronSchedule_Test
+ * @group schedules
+ */
+class ActionScheduler_CronSchedule_Test extends ActionScheduler_UnitTestCase {
+	public function test_creation() {
+		$time = as_get_datetime_object('tomorrow');
+		$cron = CronExpression::factory('@daily');
+		$schedule = new ActionScheduler_CronSchedule(as_get_datetime_object(), $cron);
+		$this->assertEquals( $time, $schedule->next() );
+	}
+
+	public function test_next() {
+		$time = as_get_datetime_object('2013-06-14');
+		$cron = CronExpression::factory('@daily');
+		$schedule = new ActionScheduler_CronSchedule($time, $cron);
+		$this->assertEquals( as_get_datetime_object('tomorrow'), $schedule->next( as_get_datetime_object() ) );
+	}
+
+	public function test_is_recurring() {
+		$schedule = new ActionScheduler_CronSchedule(as_get_datetime_object('2013-06-14'), CronExpression::factory('@daily'));
+		$this->assertTrue( $schedule->is_recurring() );
+	}
+
+	public function test_cron_format() {
+		$time = as_get_datetime_object('2014-01-01');
+		$cron = CronExpression::factory('0 0 10 10 *');
+		$schedule = new ActionScheduler_CronSchedule($time, $cron);
+		$this->assertEquals( as_get_datetime_object('2014-10-10'), $schedule->next() );
+
+		$cron = CronExpression::factory('0 0 L 1/2 *');
+		$schedule = new ActionScheduler_CronSchedule($time, $cron);
+		$this->assertEquals( as_get_datetime_object('2014-01-31'), $schedule->next() );
+		$this->assertEquals( as_get_datetime_object('2014-07-31'), $schedule->next( as_get_datetime_object('2014-06-01') ) );
+		$this->assertEquals( as_get_datetime_object('2028-11-30'), $schedule->next( as_get_datetime_object('2028-11-01') ) );
+
+		$cron = CronExpression::factory('30 14 * * MON#3 *');
+		$schedule = new ActionScheduler_CronSchedule($time, $cron);
+		$this->assertEquals( as_get_datetime_object('2014-01-20 14:30:00'), $schedule->next() );
+		$this->assertEquals( as_get_datetime_object('2014-05-19 14:30:00'), $schedule->next( as_get_datetime_object('2014-05-01') ) );
+	}
+}
+ 

tests/phpunit/schedules/ActionScheduler_IntervalSchedule_Test.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * Class ActionScheduler_IntervalSchedule_Test
+ * @group schedules
+ */
+class ActionScheduler_IntervalSchedule_Test extends ActionScheduler_UnitTestCase {
+	public function test_creation() {
+		$time = as_get_datetime_object();
+		$schedule = new ActionScheduler_IntervalSchedule($time, HOUR_IN_SECONDS);
+		$this->assertEquals( $time, $schedule->next() );
+	}
+
+	public function test_next() {
+		$now = time();
+		$start = $now - 30;
+		$schedule = new ActionScheduler_IntervalSchedule( as_get_datetime_object("@$start"), MINUTE_IN_SECONDS );
+		$this->assertEquals( $start, $schedule->next()->getTimestamp() );
+		$this->assertEquals( $now + MINUTE_IN_SECONDS, $schedule->next(as_get_datetime_object())->getTimestamp() );
+		$this->assertEquals( $start, $schedule->next(as_get_datetime_object("@$start"))->getTimestamp() );
+	}
+
+	public function test_is_recurring() {
+		$start = time() - 30;
+		$schedule = new ActionScheduler_IntervalSchedule( as_get_datetime_object("@$start"), MINUTE_IN_SECONDS );
+		$this->assertTrue( $schedule->is_recurring() );
+	}
+}