New Abstract WC_Data Class
This commit is contained in:
Justin Shreve
parent
353dc2d87e
commit
f572a887e0
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<?php
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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/**
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* Abstract WC Data Class
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*
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* Implemented by classes using the same CRUD(s) pattern.
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*
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* @version 2.7.0
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* @package WooCommerce/Abstracts
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* @category Abstract Class
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* @author WooThemes
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*/
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abstract class WC_Data {
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/**
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* Stores meta in cache for future reads.
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* A group must be set to to enable caching.
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* @var string
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*/
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protected $_cache_group = '';
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/**
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* Meta type. This should match up with
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* the types avaiable at https://codex.wordpress.org/Function_Reference/add_metadata.
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* WP defines 'post', 'user', 'comment', and 'term'.
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*/
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protected $_meta_type = 'post';
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/**
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* This only needs set if you are using a custom metadata type (for example payment tokens.
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* This should be the name of the field your table uses for associating meta with objects.
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* For example, in payment_tokenmeta, this would be payment_token_id.
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* @var string
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*/
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protected $object_id_field_for_meta = '';
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/**
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* Stores additonal meta data.
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* @var array
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*/
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protected $_meta_data = array();
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/**
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* Internal meta keys we don't want exposed for the object.
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* @var array
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*/
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protected $_internal_meta_keys = array();
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/**
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* Returns the unique ID for this object.
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* @return int
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*/
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abstract public function get_id();
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/**
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* Returns all data for this object.
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* @return array
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*/
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abstract public function get_data();
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/**
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* Creates new object in the database.
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*/
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abstract public function create();
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/**
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* Read object from the database.
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* @param int ID of the object to load.
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*/
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abstract public function read( $id );
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/**
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* Updates object data in the database.
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*/
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abstract public function update();
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/**
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* Updates object data in the database.
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*/
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abstract public function delete();
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/**
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* Save should create or update based on object existance.
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*/
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abstract public function save();
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/**
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* Get All Meta Data
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* @return array
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*/
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public function get_meta_data() {
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return $this->_meta_data;
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}
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/**
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* Internal meta keys we don't want exposed as part of meta_data. This is in
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* addition to all data props with _ prefix.
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* @return array()
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*/
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protected function prefix_key( $key ) {
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return '_' === substr( $key, 0, 1 ) ? $key : '_' . $key;
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}
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/**
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* Internal meta keys we don't want exposed as part of meta_data. This is in
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* addition to all data props with _ prefix.
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* @return array()
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*/
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protected function get_internal_meta_keys() {
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return array_merge( array_map( array( $this, 'prefix_key' ), array_keys( $this->_data ) ), $this->_internal_meta_keys );
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}
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/**
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* Get Meta Data by Key.
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* @param string $key
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* @param bool $single return first found meta with key, or all with $key
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* @return mixed
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*/
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public function get_meta( $key = '', $single = true ) {
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$meta_ids = array_keys( wp_list_pluck( $this->_meta_data, 'key' ), $key );
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$value = '';
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if ( $meta_ids ) {
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if ( $single ) {
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$value = $this->_meta_data[ current( $meta_ids ) ]->value;
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} else {
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$value = array_intersect_key( $this->_meta_data, $meta_ids );
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}
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}
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return $value;
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}
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/**
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* Set all meta data from array.
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* @param array $data Key/Value pairs
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*/
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public function set_meta_data( $data ) {
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if ( ! empty( $data ) && is_array( $data ) ) {
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foreach ( $data as $meta_id => $meta ) {
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$meta = (array) $meta;
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if ( isset( $meta['key'], $meta['value'] ) ) {
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$this->_meta_data[ $meta_id ] = (object) array(
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'key' => $meta['key'],
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'value' => $meta['value'],
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);
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}
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}
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}
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}
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/**
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* Add meta data.
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* @param array $key Meta key
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* @param array $value Meta value
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* @param array $unique Should this be a unique key?
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*/
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public function add_meta_data( $key, $value, $unique = false ) {
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if ( $unique ) {
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$meta_ids = array_keys( wp_list_pluck( $this->_meta_data, 'key' ), $key );
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$this->_meta_data = array_diff_key( $this->_meta_data, array_fill_keys( $meta_ids, '' ) );
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}
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$this->_meta_data[ 'new-' . sizeof( $this->_meta_data ) ] = (object) array(
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'key' => $key,
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'value' => $value,
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);
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}
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/**
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* Update meta data by key or ID, if provided.
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* @param string $key
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* @param string $value
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* @param int $meta_id
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*/
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public function update_meta_data( $key, $value, $meta_id = '' ) {
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if ( $meta_id && isset( $this->_meta_data[ $meta_id ] ) ) {
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$this->_meta_data[ $meta_id ] = (object) array(
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'key' => $key,
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'value' => $value,
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);
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} else {
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$this->add_meta_data( $key, $value, true );
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}
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}
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/**
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* Delete meta data.
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* @param array $key Meta key
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*/
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public function delete_meta_data( $key ) {
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$meta_ids = array_keys( wp_list_pluck( $this->_meta_data, 'key' ), $key );
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$this->_meta_data = array_diff_key( $this->_meta_data, array_fill_keys( $meta_ids, '' ) );
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}
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/**
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* Read Meta Data from the database. Ignore any internal properties.
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*/
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protected function read_meta_data() {
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$this->_meta_data = array();
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$cache_loaded = false;
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if ( ! $this->get_id() ) {
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return;
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}
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if ( ! empty ( $this->_cache_group ) ) {
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$cache_key = WC_Cache_Helper::get_cache_prefix( $this->_cache_group ) . $this->get_id();
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$cached_meta = wp_cache_get( $cache_key, $this->_cache_group );
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if ( false !== $cached_meta ) {
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$this->_meta_data = $cached_meta;
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$cache_loaded = true;
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}
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}
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if ( ! $cache_loaded ) {
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global $wpdb;
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$db_info = $this->_get_db_info();
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$raw_meta_data = $wpdb->get_results( $wpdb->prepare( "
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SELECT " . $db_info['meta_id_field'] . ", meta_key, meta_value
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FROM " . $db_info['table'] . "
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WHERE " . $db_info['object_id_field'] . " = %d ORDER BY meta_id
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", $this->get_id() ) );
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foreach ( $raw_meta_data as $meta ) {
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if ( in_array( $meta->meta_key, $this->get_internal_meta_keys() ) ) {
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continue;
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}
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$this->_meta_data[ $meta->meta_id ] = (object) array( 'key' => $meta->meta_key, 'value' => $meta->meta_value );
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}
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if ( ! empty ( $this->_cache_group ) ) {
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wp_cache_set( $cache_key, $this->_meta_data, $this->_cache_group );
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}
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}
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}
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/**
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* Update Meta Data in the database.
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*/
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protected function save_meta_data() {
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global $wpdb;
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$db_info = $this->_get_db_info();
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$all_meta_ids = array_map( 'absint', $wpdb->get_col( $wpdb->prepare( "
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SELECT " . $db_info['meta_id_field'] . " FROM " . $db_info['table'] . "
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WHERE " . $db_info['object_id_field'] . " = %d", $this->get_id() ) . "
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AND meta_key NOT IN ('" . implode( "','", array_map( 'esc_sql', $this->get_internal_meta_keys() ) ) . "');
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" ) );
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$set_meta_ids = array();
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foreach ( $this->_meta_data as $meta_id => $meta ) {
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if ( 'new' === substr( $meta_id, 0, 3 ) ) {
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$set_meta_ids[] = add_metadata( $this->_meta_type, $this->get_id(), $meta->key, $meta->value, false );
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} else {
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update_metadata_by_mid( $this->_meta_type, $meta_id, $meta->value, $meta->key );
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$set_meta_ids[] = absint( $meta_id );
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}
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}
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// Delete no longer set meta data
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$delete_meta_ids = array_diff( $all_meta_ids, $set_meta_ids );
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foreach ( $delete_meta_ids as $meta_id ) {
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delete_metadata_by_mid( $this->_meta_type, $meta_id );
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}
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if ( ! empty ( $this->_cache_group ) ) {
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WC_Cache_Helper::incr_cache_prefix( $this->_cache_group );
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}
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$this->read_meta_data();
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}
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/**
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* Table structure is slightly different between meta types, this function will return what we need to know.
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* @return array Array elements: table, object_id_field, meta_id_field
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*/
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private function _get_db_info() {
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global $wpdb;
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$object_id_field = '';
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$meta_id_field = 'meta_id'; // for some reason users calls this umeta_id so we need to track this as well.
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$table = $wpdb->prefix;
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// If we are dealing with a type of metadata that is not a core type, the table should be prefixed.
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if ( ! in_array( $this->_meta_type, array( 'post', 'user', 'comment', 'term' ) ) ) {
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$table = 'woocommerce_';
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}
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$table = $this->_meta_type . 'meta';
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// Figure out our field names.
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if ( 'post' === $this->_meta_type ) {
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$object_id_field = 'post_id';
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} elseif ( 'user' === $this->_meta_type ) {
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$object_id_field = 'user_id';
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$meta_id_field = 'umeta_id';
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} else if ( 'comment' === $this->_meta_type ) {
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$object_id_field = 'comment_id';
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} else if ( 'term' === $this->_meta_data ) {
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$object_id_field = 'term_id';
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} else {
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if ( ! empty ( $this->object_id_field_for_meta ) ) {
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$object_id_field = $this->object_id_field_for_meta;
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} else {
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$object_id_field = 'post_id'; // default to post_id
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}
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}
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return array(
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'table' => $table,
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'object_id_field' => $object_id_field,
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'meta_id_field' => $meta_id_field,
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);
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}
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}
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