785 lines
20 KiB
PHP
785 lines
20 KiB
PHP
<?php
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if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly
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/**
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* WooCommerce Webhook class
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*
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* This class handles storing and retrieving webhook data from the associated
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* `shop_webhook` custom post type, as well as delivery logs from the `webhook_delivery`
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* comment type.
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*
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* Webhooks are enqueued to their associated actions, delivered, and logged.
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*
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* @author WooThemes
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* @category Webhooks
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* @package WooCommerce/Webhooks
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* @since 2.2
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*/
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class WC_Webhook {
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/** @var int webhook ID (post ID) */
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public $id;
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/**
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* Setup webhook & load post data
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*
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* @since 2.2
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* @param string|int $id
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* @return \WC_Webhook
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*/
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public function __construct( $id ) {
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$id = absint( $id );
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if ( ! $id ) {
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return;
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}
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$this->id = $id;
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$this->post_data = get_post( $id );
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}
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/**
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* Magic isset as a wrapper around metadata_exists()
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*
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* @since 2.2
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* @param string $key
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* @return bool true if $key isset, false otherwise
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*/
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public function __isset( $key ) {
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if ( ! $this->id ) {
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return false;
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}
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return metadata_exists( 'post', $this->id, '_' . $key );
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}
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/**
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* Magic get, wraps get_post_meta() for all keys except $status
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*
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* @since 2.2
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* @param string $key
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* @return mixed|null|void value
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*/
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public function __get( $key ) {
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$value = null;
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if ( 'status' === $key ) {
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$value = $this->get_status();
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} else {
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$value = get_post_meta( $this->id, '_' . $key, true );
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}
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return $value;
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}
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/**
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* Enqueue the hooks associated with the webhook
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*
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* @since 2.2
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*/
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public function enqueue() {
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foreach ( $this->get_hooks() as $hook ) {
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add_action( $hook, array( $this, 'process' ) );
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}
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}
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/**
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* Process the webhook for delivery by verifying the it should be delivered
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* and scheduling the delivery (in the background by default, or immediately)
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*
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* @since 2.2
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* @param mixed $arg the first argument provided from the associated hooks
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*/
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public function process( $arg ) {
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// verify that webhook should be processed for delivery
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if ( ! $this->should_deliver( $arg ) ) {
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return;
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}
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// webhooks are processed in the background by default
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// so as to avoid delays or failures in delivery from affecting the
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// user who triggered it
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if ( apply_filters( 'woocommerce_webhook_deliver_async', true, $this ) ) {
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// deliver in background
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wp_schedule_single_event( time(), 'woocommerce_deliver_webhook_async', array( $this->id, is_scalar( $arg ) ? $arg : 0 ) );
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} else {
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// deliver immediately
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$this->deliver( $arg );
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}
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}
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/**
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* Helper to check if the webhook should be delivered, as some hooks
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* (like `wp_trash_post`) will fire for every post type, not just ours.
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*
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* @since 2.2
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* @param mixed $arg first hook argument
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* @return bool true if webhook should be delivered, false otherwise
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*/
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private function should_deliver( $arg ) {
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// only active webhooks can be delivered
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if ( 'active' != $this->get_status() ) {
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return false;
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}
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$current_action = current_action();
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// only deliver deleted event for coupons, orders, and products
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if ( 'delete_post' == $current_action && ! in_array( $GLOBALS['post_type'], array( 'shop_coupon', 'shop_order', 'product' ) ) ) {
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return false;
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} elseif ( 'delete_user' == $current_action ) {
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$user = get_userdata( absint( $arg ) );
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// only deliver deleted customer event for users with customer role
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if ( ! $user || ! in_array( 'customer', (array) $user->roles ) ) {
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return false;
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}
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} elseif ( 0 === strpos( $current_action, 'woocommerce_process_shop' ) ) {
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// the `woocommerce_process_shop_*` hook fires for both updates
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// and creation so check the post creation date to determine the actual event
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$resource = get_post( absint( $arg ) );
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// a resource is considered created when the hook is executed within 10 seconds of the post creation date
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$resource_created = ( ( time() - 10 ) <= strtotime( $resource->post_date_gmt ) );
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if ( 'created' == $this->get_event() && ! $resource_created ) {
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return false;
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} elseif ( 'updated' == $this->get_event() && $resource_created ) {
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return false;
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}
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}
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return true;
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}
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/**
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* Deliver the webhook payload using wp_remote_request()
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*
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* @since 2.2
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* @param mixed $arg first hook argument
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*/
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public function deliver( $arg ) {
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$payload = $this->build_payload( $arg );
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// setup request args
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$http_args = array(
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'method' => 'POST',
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'timeout' => MINUTE_IN_SECONDS,
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'redirection' => 0,
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'httpversion' => '1.0',
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'sslverify' => false,
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'blocking' => true,
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'user-agent' => sprintf( 'WooCommerce/%s Hookshot (WordPress/%s)', WC_VERSION, $GLOBALS['wp_version'] ),
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'body' => trim( json_encode( $payload ) ),
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'headers' => array( 'Content-Type' => 'application/json' ),
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'cookies' => array(),
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);
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$http_args = apply_filters( 'woocommerce_webhook_http_args', $http_args, $arg, $this->id );
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// add custom headers
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$http_args['headers']['X-WC-Webhook-Topic'] = $this->get_topic();
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$http_args['headers']['X-WC-Webhook-Resource'] = $this->get_resource();
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$http_args['headers']['X-WC-Webhook-Event'] = $this->get_event();
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$http_args['headers']['X-WC-Webhook-Signature'] = $this->generate_signature( $http_args['body'] );
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$http_args['headers']['X-WC-Webhook-ID'] = $this->id;
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$http_args['headers']['X-WC-Webhook-Delivery-ID'] = $delivery_id = $this->get_new_delivery_id();
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$start_time = microtime( true );
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// webhook away!
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$response = wp_remote_request( $this->get_delivery_url(), $http_args );
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$duration = round( microtime( true ) - $start_time, 5 );
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$this->log_delivery( $delivery_id, $http_args, $response, $duration );
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do_action( 'woocommerce_webhook_delivery', $http_args, $response, $duration, $arg, $this->id );
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}
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/**
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* Build the payload data for the webhook
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*
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* @since 2.2
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* @param mixed $resource_id first hook argument, typically the resource ID
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* @return mixed payload data
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*/
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private function build_payload( $resource_id ) {
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// build the payload with the same user context as the user who created
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// the webhook -- this avoids permission errors as background processing
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// runs with no user context
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$current_user = get_current_user_id();
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wp_set_current_user( $this->get_user_id() );
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$resource = $this->get_resource();
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$event = $this->get_event();
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// if a resource has been deleted, just include the ID
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if ( 'deleted' == $event ) {
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$payload = array(
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'id' => $resource_id,
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);
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} else {
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// include & load API classes
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WC()->api->includes();
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WC()->api->register_resources( new WC_API_Server( '/' ) );
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switch( $resource ) {
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case 'coupon':
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$payload = WC()->api->WC_API_Coupons->get_coupon( $resource_id );
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break;
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case 'customer':
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$payload = WC()->api->WC_API_Customers->get_customer( $resource_id );
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break;
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case 'order':
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$payload = WC()->api->WC_API_Orders->get_order( $resource_id );
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break;
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case 'product':
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$payload = WC()->api->WC_API_Products->get_product( $resource_id );
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break;
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// custom topics include the first hook argument
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case 'action':
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$payload = array(
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'action' => current( $this->get_hooks() ),
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'arg' => $resource_id,
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);
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break;
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default:
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$payload = array();
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}
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}
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// restore the current user
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wp_set_current_user( $current_user );
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return apply_filters( 'woocommerce_webhook_payload', $payload, $resource, $resource_id, $this->id );
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}
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/**
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* Generate a base64-encoded HMAC-SHA256 signature of the payload body so the
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* recipient can verify the authenticity of the webhook. Note that the signature
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* is calculated after the body has already been encoded (JSON by default)
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*
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* @since 2.2
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* @param string $payload payload data to hash
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* @return string hash
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*/
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public function generate_signature( $payload ) {
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$hash_algo = apply_filters( 'woocommerce_webhook_hash_algorithm', 'sha256', $payload, $this->id );
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return base64_encode( hash_hmac( $hash_algo, $payload, $this->get_secret(), true ) );
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}
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/**
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* Create a new comment for log the delivery request/response and
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* return the ID for inclusion in the webhook request
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*
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* @since 2.2
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* @return int delivery (comment) ID
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*/
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public function get_new_delivery_id() {
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$comment_data = apply_filters( 'woocommerce_new_webhook_delivery_data', array(
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'comment_author' => __( 'WooCommerce', 'woocommerce' ),
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'comment_author_email' => sanitize_email( sprintf( '%s@%s', strtolower( __( 'WooCommerce', 'woocommerce' ) ), isset( $_SERVER['HTTP_HOST'] ) ? str_replace( 'www.', '', $_SERVER['HTTP_HOST'] ) : 'noreply.com' ) ),
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'comment_post_ID' => $this->id,
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'comment_agent' => 'WooCommerce Hookshot',
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'comment_type' => 'webhook_delivery',
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'comment_parent' => 0,
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'comment_approved' => 1,
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), $this->id );
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$comment_id = wp_insert_comment( $comment_data );
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return $comment_id;
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}
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/**
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* Log the delivery request/response
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*
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* @since 2.2
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* @param int $delivery_id previously created comment ID
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* @param array $request request data
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* @param array $response response data
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* @param float $duration request duration
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*/
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public function log_delivery( $delivery_id, $request, $response, $duration ) {
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// save request data
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add_comment_meta( $delivery_id, '_request_method', $request['method'] );
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add_comment_meta( $delivery_id, '_request_headers', array_merge( (array) $request['user-agent'], $request['headers'] ) );
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add_comment_meta( $delivery_id, '_request_body', $request['body'] );
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// parse response
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if ( is_wp_error( $response ) ) {
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$response_code = $response->get_error_code();
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$response_message = $response->get_error_message();
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$response_headers = $response_body = array();
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} else {
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$response_code = wp_remote_retrieve_response_code( $response );
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$response_message = wp_remote_retrieve_response_message( $response );
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$response_headers = wp_remote_retrieve_headers( $response );
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$response_body = wp_remote_retrieve_body( $response );
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}
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// save response data
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add_comment_meta( $delivery_id, '_response_code', $response_code );
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add_comment_meta( $delivery_id, '_response_message', $response_message );
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add_comment_meta( $delivery_id, '_response_headers', $response_headers );
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add_comment_meta( $delivery_id, '_response_body', $response_body );
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// save duration
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add_comment_meta( $delivery_id, '_duration', $duration );
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// set a summary for quick display
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$args = array(
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'comment_ID' => $delivery_id,
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'comment_content' => sprintf( 'HTTP %s %s: %s', $response_code, $response_message, $response_body ),
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);
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wp_update_comment( $args );
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// track failures
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if ( intval( $response_code ) >= 200 && intval( $response_code ) < 300 ) {
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delete_post_meta( $this->id, '_failure_count' );
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} else {
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$this->failed_delivery();
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}
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// keep the 25 most recent delivery logs
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$log = wp_count_comments( $this->id );
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if ( $log->total_comments > apply_filters( 'woocommerce_max_webhook_delivery_logs', 25 ) ) {
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global $wpdb;
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$comment_id = $wpdb->get_var( $wpdb->prepare( "SELECT comment_ID FROM {$wpdb->comments} WHERE comment_post_ID = %d ORDER BY comment_date_gmt ASC LIMIT 1", $this->id ) );
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if ( $comment_id ) {
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wp_delete_comment( $comment_id, true );
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}
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}
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}
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/**
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* Track consecutive delivery failures and automatically disable the webhook
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* if more than 5 consecutive failures occur. A failure is defined as a
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* non-2xx response
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*
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* @since 2.2
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*/
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private function failed_delivery() {
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$failures = $this->get_failure_count();
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if ( $failures > apply_filters( 'woocommerce_max_webhook_delivery_failures', 5 ) ) {
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$this->update_status( 'disabled' );
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} else {
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update_post_meta( $this->id, '_failure_count', ++$failures );
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}
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}
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/**
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* Get the delivery logs for this webhook
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*
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* @since 2.2
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* @return array
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*/
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public function get_delivery_logs() {
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$args = array(
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'post_id' => $this->id,
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'status' => 'approve',
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'type' => 'webhook_delivery',
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);
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remove_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_webhook_comments' ), 10, 1 );
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$logs = get_comments( $args );
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add_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_webhook_comments' ), 10, 1 );
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$delivery_logs = array();
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foreach ( $logs as $log ) {
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$log = $this->get_delivery_log( $log->comment_ID );
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$delivery_logs[] = ( ! empty( $log ) ? $log : array() );
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}
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return $delivery_logs;
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}
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/**
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* Get the delivery log specified by the ID. The delivery log includes:
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*
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* + duration
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* + summary
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* + request method/url
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* + request headers/body
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* + response code/message/headers/body
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*
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* @since 2.2
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* @param int $delivery_id
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* @return bool|array false if invalid delivery ID, array of log data otherwise
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*/
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public function get_delivery_log( $delivery_id ) {
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$log = get_comment( $delivery_id );
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// valid comment and ensure delivery log belongs to this webhook
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if ( is_null( $log ) || $log->comment_post_ID != $this->id ) {
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return false;
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}
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$delivery_log = array(
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'id' => intval( $delivery_id ),
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'duration' => get_comment_meta( $delivery_id, '_duration', true ),
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'summary' => $log->comment_content,
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'request_method' => get_comment_meta( $delivery_id, '_request_method', true ),
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'request_url' => $this->get_delivery_url(),
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'request_headers' => get_comment_meta( $delivery_id, '_request_headers', true ),
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'request_body' => get_comment_meta( $delivery_id, '_request_body', true ),
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'response_code' => get_comment_meta( $delivery_id, '_response_code', true ),
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'response_message' => get_comment_meta( $delivery_id, '_response_message', true ),
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'response_headers' => get_comment_meta( $delivery_id, '_response_headers', true ),
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'response_body' => get_comment_meta( $delivery_id, '_response_body', true ),
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'comment' => $log,
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);
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return apply_filters( 'woocommerce_webhook_delivery_log', $delivery_log, $delivery_id, $this->id );
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}
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/**
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* Set the webhook topic and associated hooks. The topic resource & event
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* are also saved separately.
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*
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* @since 2.2
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* @param string $topic
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*/
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public function set_topic( $topic ) {
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$topic = strtolower( $topic );
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list( $resource, $event ) = explode( '.', $topic );
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update_post_meta( $this->id, '_topic', $topic );
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update_post_meta( $this->id, '_resource', $resource );
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update_post_meta( $this->id, '_event', $event );
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// custom topics are mapped to a single hook
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if ( 'action' === $resource ) {
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update_post_meta( $this->id, '_hooks', array( $event ) );
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} else {
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// API topics have multiple hooks
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update_post_meta( $this->id, '_hooks', $this->get_topic_hooks( $topic ) );
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}
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}
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/**
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* Get the associated hook names for a topic
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*
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* @since 2.2
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* @param string $topic
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* @return array hook names
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*/
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private function get_topic_hooks( $topic ) {
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$topic_hooks = array(
|
|
'coupon.created' => array(
|
|
'woocommerce_process_shop_coupon_meta',
|
|
'woocommerce_api_create_coupon',
|
|
),
|
|
'coupon.updated' => array(
|
|
'woocommerce_process_shop_coupon_meta',
|
|
'woocommerce_api_edit_coupon',
|
|
),
|
|
'coupon.deleted' => array(
|
|
'wp_trash_post',
|
|
),
|
|
'customer.created' => array(
|
|
'woocommerce_created_customer',
|
|
),
|
|
'customer.updated' => array(
|
|
'profile_update',
|
|
'woocommerce_api_edit_customer',
|
|
),
|
|
'customer.deleted' => array(
|
|
'delete_user',
|
|
),
|
|
'order.created' => array(
|
|
'woocommerce_checkout_order_processed',
|
|
'woocommerce_process_shop_order_meta',
|
|
'woocommerce_api_create_order',
|
|
),
|
|
'order.updated' => array(
|
|
'woocommerce_process_shop_order_meta',
|
|
'woocommerce_api_edit_order',
|
|
),
|
|
'order.deleted' => array(
|
|
'wp_trash_post',
|
|
),
|
|
'product.created' => array(
|
|
'woocommerce_process_product_meta',
|
|
'woocommerce_api_create_product',
|
|
),
|
|
'product.updated' => array(
|
|
'woocommerce_process_product_meta',
|
|
'woocommerce_api_edit_product',
|
|
),
|
|
'product.deleted' => array(
|
|
'wp_trash_post',
|
|
),
|
|
);
|
|
|
|
$topic_hooks = apply_filters( 'woocommerce_webhook_topic_hooks', $topic_hooks, $this );
|
|
|
|
return isset( $topic_hooks[ $topic ] ) ? $topic_hooks[ $topic ] : array();
|
|
}
|
|
|
|
/**
|
|
* Send a test ping to the delivery URL, sent when the webhook is first created
|
|
*
|
|
* @since 2.2
|
|
*/
|
|
public function deliver_ping() {
|
|
|
|
$args = array(
|
|
'user-agent' => sprintf( 'WooCommerce/%s Hookshot (WordPress/%s)', WC_VERSION, $GLOBALS['wp_version'] ),
|
|
'body' => "webhook_id={$this->id}",
|
|
);
|
|
|
|
wp_remote_post( $this->get_delivery_url(), $args );
|
|
}
|
|
|
|
/**
|
|
* Get the webhook status:
|
|
*
|
|
* + `active` - delivers payload
|
|
* + `paused` - does not deliver payload, paused by admin
|
|
* + `disabled` - does not delivery payload, paused automatically due to
|
|
* consecutive failures
|
|
*
|
|
* @since 2.2
|
|
* @return string status
|
|
*/
|
|
public function get_status() {
|
|
|
|
switch ( $this->get_post_data()->post_status ) {
|
|
|
|
case 'publish':
|
|
$status = 'active';
|
|
break;
|
|
|
|
case 'draft':
|
|
$status = 'paused';
|
|
break;
|
|
|
|
case 'pending':
|
|
$status = 'disabled';
|
|
break;
|
|
|
|
default:
|
|
$status = 'paused';
|
|
}
|
|
|
|
return apply_filters( 'woocommerce_webhook_status', $status, $this->id );
|
|
}
|
|
|
|
/**
|
|
* Update the webhook status, see get_status() for valid statuses
|
|
*
|
|
* @since 2.2
|
|
* @param $status
|
|
*/
|
|
public function update_status( $status ) {
|
|
|
|
switch ( $status ) {
|
|
|
|
case 'active':
|
|
$post_status = 'publish';
|
|
break;
|
|
|
|
case 'paused':
|
|
$post_status = 'draft';
|
|
break;
|
|
|
|
case 'disabled':
|
|
$post_status = 'pending';
|
|
break;
|
|
|
|
default:
|
|
$post_status = 'draft';
|
|
}
|
|
|
|
wp_update_post( array( 'ID' => $this->id, 'post_status' => $post_status ) );
|
|
}
|
|
|
|
/**
|
|
* Set the delivery URL
|
|
*
|
|
* @since 2.2
|
|
* @param string $url
|
|
*/
|
|
public function set_delivery_url( $url ) {
|
|
|
|
update_post_meta( $this->id, '_delivery_url', esc_url_raw( $url, array( 'http', 'https' ) ) );
|
|
}
|
|
|
|
/**
|
|
* Get the delivery URL
|
|
*
|
|
* @since 2.2
|
|
* @return string
|
|
*/
|
|
public function get_delivery_url() {
|
|
|
|
return apply_filters( 'woocommerce_webhook_delivery_url', $this->delivery_url, $this->id );
|
|
}
|
|
|
|
/**
|
|
* Set the secret used for generating the HMAC-SHA256 signature
|
|
*
|
|
* @since 2.2
|
|
* @param string $secret
|
|
*/
|
|
public function set_secret( $secret ) {
|
|
|
|
update_post_meta( $this->id, '_secret', $secret );
|
|
}
|
|
|
|
/**
|
|
* Get the secret used for generating the HMAC-SHA256 signature
|
|
*
|
|
* @since 2.2
|
|
* @return string
|
|
*/
|
|
public function get_secret() {
|
|
return apply_filters( 'woocommerce_webhook_secret', $this->secret, $this->id );
|
|
}
|
|
|
|
/**
|
|
* Get the friendly name for the webhook
|
|
*
|
|
* @since 2.2
|
|
* @return string
|
|
*/
|
|
public function get_name() {
|
|
return apply_filters( 'woocommece_webhook_name', $this->get_post_data()->post_title, $this->id );
|
|
}
|
|
|
|
/**
|
|
* Get the webhook topic, e.g. `order.created`
|
|
*
|
|
* @since 2.2
|
|
* @return string
|
|
*/
|
|
public function get_topic() {
|
|
return apply_filters( 'woocommerce_webhook_topic', $this->topic, $this->id );
|
|
}
|
|
|
|
/**
|
|
* Get the hook names for the webhook
|
|
*
|
|
* @since 2.2
|
|
* @return array hook names
|
|
*/
|
|
public function get_hooks() {
|
|
return apply_filters( 'woocommerce_webhook_hooks', $this->hooks, $this->id );
|
|
}
|
|
|
|
/**
|
|
* Get the resource for the webhook, e.g. `order`
|
|
*
|
|
* @since 2.2
|
|
* @return string
|
|
*/
|
|
public function get_resource() {
|
|
return apply_filters( 'woocommerce_webhook_resource', $this->resource, $this->id );
|
|
}
|
|
|
|
/**
|
|
* Get the event for the webhook, e.g. `created`
|
|
*
|
|
* @since 2.2
|
|
* @return string
|
|
*/
|
|
public function get_event() {
|
|
return apply_filters( 'woocommerce_webhook_event', $this->event, $this->id );
|
|
}
|
|
|
|
/**
|
|
* Get the failure count
|
|
*
|
|
* @since 2.2
|
|
* @return int
|
|
*/
|
|
public function get_failure_count() {
|
|
return intval( $this->failure_count );
|
|
}
|
|
|
|
/**
|
|
* Get the user ID for this webhook
|
|
*
|
|
* @since 2.2
|
|
* @return int|string user ID
|
|
*/
|
|
public function get_user_id() {
|
|
return $this->get_post_data()->post_author;
|
|
}
|
|
|
|
/**
|
|
* Get the post data for the webhook
|
|
*
|
|
* @since 2.2
|
|
* @return null|WP_Post
|
|
*/
|
|
public function get_post_data() {
|
|
return $this->post_data;
|
|
}
|
|
|
|
}
|