120 lines
2.2 KiB
PHP
120 lines
2.2 KiB
PHP
<?php
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/**
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* Wraps an array (meta data for now) and tells if there was any changes.
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*
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* The main idea behind this class is to avoid doing unneeded
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* SQL updates if nothing changed.
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*
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* @version 3.2.0
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* @package WooCommerce
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*/
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defined( 'ABSPATH' ) || exit;
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/**
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* Meta data class.
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*/
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class WC_Meta_Data implements JsonSerializable {
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/**
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* Current data for metadata
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*
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* @since 3.2.0
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* @var array
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*/
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protected $current_data;
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/**
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* Metadata data
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*
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* @since 3.2.0
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* @var array
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*/
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protected $data;
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/**
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* Constructor.
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*
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* @param array $meta Data to wrap behind this function.
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*/
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public function __construct( $meta = array() ) {
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$this->current_data = $meta;
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$this->apply_changes();
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}
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/**
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* When converted to JSON.
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*
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* @return object|array
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*/
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public function jsonSerialize() {
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return $this->get_data();
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}
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/**
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* Merge changes with data and clear.
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*/
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public function apply_changes() {
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$this->data = $this->current_data;
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}
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/**
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* Creates or updates a property in the metadata object.
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*
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* @param string $key Key to set.
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* @param mixed $value Value to set.
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*/
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public function __set( $key, $value ) {
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$this->current_data[ $key ] = $value;
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}
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/**
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* Checks if a given key exists in our data. This is called internally
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* by `empty` and `isset`.
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*
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* @param string $key Key to check if set.
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*
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* @return bool
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*/
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public function __isset( $key ) {
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return array_key_exists( $key, $this->current_data );
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}
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/**
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* Returns the value of any property.
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*
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* @param string $key Key to get.
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* @return mixed Property value or NULL if it does not exists
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*/
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public function __get( $key ) {
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if ( array_key_exists( $key, $this->current_data ) ) {
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return $this->current_data[ $key ];
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}
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return null;
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}
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/**
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* Return data changes only.
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*
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* @return array
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*/
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public function get_changes() {
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$changes = array();
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foreach ( $this->current_data as $id => $value ) {
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if ( ! array_key_exists( $id, $this->data ) || $value !== $this->data[ $id ] ) {
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$changes[ $id ] = $value;
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}
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}
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return $changes;
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}
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/**
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* Return all data as an array.
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*
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* @return array
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*/
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public function get_data() {
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return $this->data;
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}
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}
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