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✏️ Editing: product-language-cpt.php

<?php
/**
 * @package Polylang-WC
 */

defined( 'ABSPATH' ) || exit;

/**
 * Setups the product languages and translations model when products are managed with a custom post type.
 *
 * @since 1.0
 */
class PLLWC_Product_Language_CPT extends PLLWC_Translated_Object_Language {

/**
	 * WooCommerce permalinks option.
	 *
	 * @var string[]
	 */
	protected $permalinks;

/**
	 * Current attribute term being edited.
	 *
	 * @var WP_Term|null
	 */
	protected static $editing_term;

/**
	 * Product data store.
	 *
	 * @var PLLWC_Product_Data_Store_CPT
	 */
	protected $data_store;

/**
	 * Constructor.
	 *
	 * @since 1.5
	 */
	public function __construct() {
		$this->object     = PLL()->model->post;
		$this->data_store = new PLLWC_Product_Data_Store_CPT();
	}

/**
	 * Adds hooks.
	 *
	 * @since 1.0
	 * @since 1.9 Returns an instance of this object.
	 *
	 * @return self
	 */
	public function init() {
		$this->permalinks = get_option( 'woocommerce_permalinks' );

add_filter( 'pll_get_post_types', array( $this, 'translated_post_types' ), 10, 2 );
		add_filter( 'woocommerce_register_post_type_product', array( $this, 'woocommerce_register_post_type_product' ) );
		add_filter( 'woocommerce_variable_children_args', array( $this, 'variable_children_args' ) );

// Synchronization.
		add_action( 'set_object_terms', array( $this, 'set_object_terms' ), 10, 4 );
		add_filter( 'pll_copy_post_metas', array( $this, 'copy_post_metas' ), 5, 5 );
		add_filter( 'pll_translate_post_meta', array( $this, 'translate_post_meta' ), 5, 5 );
		add_action( 'woocommerce_product_object_updated_props', array( $this, 'updated_props' ), 10, 2 );
		add_action( 'pll_post_synchronized', array( $this, 'post_synchronized' ), 10, 2 );

// Attributes.
		remove_action( 'edit_term', array( 'WC_Post_Data', 'edit_term' ) );
		remove_action( 'edited_term', array( 'WC_Post_Data', 'edited_term' ) );
		add_action( 'edit_term', array( $this, 'edit_term' ), 10, 3 );
		add_action( 'edited_term', array( $this, 'edited_term' ), 10, 3 );
		return $this;
	}

/**
	 * Add products and variations to translated post types.
	 *
	 * @since 1.0
	 *
	 * @param string[] $types List of post type names for which Polylang manages language and translations.
	 * @param bool     $hide  True when displaying the list in Polylang settings.
	 * @return string[] List of post type names for which Polylang manages language and translations.
	 */
	public function translated_post_types( $types, $hide ) {
		$woo_types = array( 'product', 'product_variation' );
		return $hide ? array_diff( $types, $woo_types ) : array_merge( $types, $woo_types );
	}

/**
	 * Disables the translation of the product slug handled by WooCommerce as it does not play nice in multilingual context.
	 *
	 * @since 0.1
	 *
	 * @param array $args arguments used to register the post type.
	 * @return array
	 */
	public function woocommerce_register_post_type_product( $args ) {
		$product_permalink = empty( $this->permalinks['product_base'] ) ? 'product' : $this->permalinks['product_base'];
		$args['rewrite'] = array( 'slug' => untrailingslashit( $product_permalink ), 'with_front' => false, 'feeds' => true );
		return $args;
	}

/**
	 * Filters args used to get variable products children, to make sure that they are not filtered by the current language.
	 *
	 * @since 0.7.3
	 *
	 * @param array $args Query arguments.
	 * @return array
	 */
	public function variable_children_args( $args ) {
		$args['lang'] = '';
		return $args;
	}

/**
	 * When assigning a product type, clear the cached value.
	 *
	 * @since 1.3.3
	 *
	 * @param int       $object_id Object ID.
	 * @param WP_Term[] $terms     An array of object terms.
	 * @param int[]     $tt_ids    An array of term taxonomy IDs.
	 * @param string    $taxonomy  Taxonomy slug.
	 * @return void
	 */
	public function set_object_terms( $object_id, $terms, $tt_ids, $taxonomy ) {
		if ( 'product_type' === $taxonomy ) {
			$cache_key = WC_Cache_Helper::get_cache_prefix( 'product_' . $object_id ) . '_type_' . $object_id;
			wp_cache_delete( $cache_key, 'products' );
		}
	}

/**
	 * Returns legacy product metas mapped to product properties.
	 *
	 * @since 1.0
	 * @since 1.9 Type-hinted.
	 *
	 * @param bool $sync True if it is synchronization, false if it is a copy.
	 * @return string[]
	 */
	protected function get_legacy_metas( $sync ): array {
		$metas_to_sync = array(
			'_backorders'            => 'backorders',
			'_children'              => 'children',
			'_crosssell_ids'         => 'cross_sell_ids',
			'_default_attributes'    => 'default_attributes',
			'_download_expiry'       => 'download_expiry',
			'_download_limit'        => 'download_limit',
			'_downloadable'          => 'downloadable',
			'_downloadable_files'    => 'downloads',
			'_featured'              => 'featured',
			'_height'                => 'height',
			'_length'                => 'length',
			'_low_stock_amount'      => 'low_stock_amount',
			'_manage_stock'          => 'manage_stock',
			'_price'                 => 'price',
			'_product_attributes'    => 'attributes',
			'_product_image_gallery' => 'gallery_image_ids',
			'_regular_price'         => 'regular_price',
			'_sale_price'            => 'sale_price',
			'_sale_price_dates_from' => 'date_on_sale_from',
			'_sale_price_dates_to'   => 'date_on_sale_to',
			'_sku'                   => 'sku',
			'_sold_individually'     => 'sold_individually',
			'_stock'                 => 'stock_quantity',
			'_tax_class'             => 'tax_class',
			'_tax_status'            => 'tax_status',
			'_thumbnail_id'          => 'image_id',
			'_upsell_ids'            => 'upsell_ids',
			'_virtual'               => 'virtual',
			'_weight'                => 'weight',
			'_width'                 => 'width',
			'_button_text'           => 'button_text',
			'_product_url'           => 'product_url',
			'_purchase_note'         => 'purchase_note',
			'_variation_description' => 'description',
		);
		return $sync ? $metas_to_sync : array_merge(
			$metas_to_sync,
			array( '_stock_status' => 'stock_status' )
		);
	}

/**
	 * Get the custom fields to copy or synchronize.
	 *
	 * @since 1.0
	 *
	 * @param string[] $metas List of custom fields names.
	 * @param bool     $sync  True if it is synchronization, false if it is a copy.
	 * @param int      $from  Id of the product from which we copy informations.
	 * @param int      $to    Id of the product to which we copy informations.
	 * @param string   $lang  Language code.
	 * @return string[]
	 */
	public function copy_post_metas( $metas, $sync, $from, $to, $lang ) {
		if ( ! in_array( get_post_type( $from ), array( 'product', 'product_variation' ) ) ) {
			return $metas;
		}

if ( $sync ) {
			// Remove product attributes from metas to copy.
			// Because these product post metas are public and automatically synchronized by Polylang.
			// See https://github.com/polylang/polylang/blob/3.3.2/modules/sync/sync-post-metas.php#L51-L61.
			$attributes_to_keep = preg_grep( '/^attribute_/', $metas, PREG_GREP_INVERT );
			if ( false !== $attributes_to_keep ) {
				$metas = $attributes_to_keep;
			}
		}

$_to_copy = self::get_legacy_metas( $sync );
		$to_copy = array_keys( $_to_copy );

// Should we copy text?
		if ( ! PLLWC_Products::should_copy_texts( $from, $to, $sync ) ) {
			$to_copy = array_diff(
				$to_copy,
				array(
					'_button_text',
					'_product_url',
					'_purchase_note',
					'_variation_description',
				)
			);
		}

/**
		 * Filters the product custom fields to copy or synchronize.
		 *
		 * @since 0.2
		 *
		 * @param string[] $to_copy List of custom fields names.
		 * @param bool     $sync    True if it is synchronization, false if it is a copy.
		 * @param int      $from    Id of the product from which we copy informations.
		 * @param int      $to      Id of the product to which we paste informations.
		 * @param string   $lang    Language code.
		 */
		$to_copy = array_unique( apply_filters( 'pllwc_copy_post_metas', array_combine( $to_copy, $to_copy ), $sync, $from, $to, $lang ) );
		$metas = array_merge( $metas, $to_copy );

return $metas;
	}

/**
	 * Update a lookup table for an object.
	 *
	 * @since 1.2
	 *
	 * @param int    $id    ID of object to update.
	 * @param string $table Lookup table name.
	 * @return void
	 */
	public function update_lookup_table( $id, $table ) {
		$this->data_store->wc_update_lookup_table( $id, $table );
	}

/**
	 * Fires actions and update look tables of translated products after properties have been synchronized.
	 *
	 * @since 1.2
	 *
	 * @param WC_Product|false $product       Product.
	 * @param array            $updated_props Product properties being updated.
	 * @return void
	 */
	public function updated_props( $product, $updated_props ) {
		static $avoid_recursion = false;

if ( $avoid_recursion || ! $product ) {
			return;
		}

$avoid_recursion = true;

$id = $product->get_id();

foreach ( $this->get_translations( $id ) as $tr_id ) {
			if ( $id && $id !== $tr_id && $tr_product = wc_get_product( $tr_id ) ) {

if ( in_array( 'stock_quantity', $updated_props, true ) ) {
					if ( $tr_product->is_type( 'variation' ) ) {
						do_action( 'woocommerce_variation_set_stock', $tr_product );
					} else {
						do_action( 'woocommerce_product_set_stock', $tr_product );
					}
				}

if ( array_intersect( $updated_props, array( 'sku', 'regular_price', 'sale_price', 'date_on_sale_from', 'date_on_sale_to', 'total_sales', 'average_rating', 'stock_quantity', 'stock_status', 'manage_stock', 'downloadable', 'virtual', 'tax_status', 'tax_class' ) ) ) {
					$this->update_lookup_table( $tr_product->get_id(), 'wc_product_meta_lookup' );
				}

// Trigger action so 3rd parties can deal with updated props.
				do_action( 'woocommerce_product_object_updated_props', $tr_product, $updated_props );
			}
		}

$avoid_recursion = false;
	}

/**
	 * Updates the lookup table after product is duplicated or synchronized.
	 *
	 * @since 1.5.5
	 *
	 * @param int $from Id of the product from which we copy informations.
	 * @param int $to   Id of the target.
	 * @return void
	 */
	public function post_synchronized( $from, $to ) {
		if ( in_array( get_post_type( $to ), array( 'product', 'product_variation' ) ) ) {
			$this->update_lookup_table( $to, 'wc_product_meta_lookup' );
		}
	}

/**
	 * Translates a custom field before it is copied or synchronized.
	 *
	 * @since 1.0
	 *
	 * @param mixed  $value Meta value.
	 * @param string $key   Meta key.
	 * @param string $lang  Language of target.
	 * @param int    $from  Id of the object from which we copy informations.
	 * @param int    $to    Id of the target.
	 * @return mixed
	 */
	public function translate_post_meta( $value, $key, $lang, $from, $to ) {
		if ( in_array( get_post_type( $from ), array( 'product', 'product_variation' ) ) ) {
			if ( 0 === strpos( $key, 'attribute_' ) ) {
				// Translate taxonomy attributes in variations.
				$tax = substr( $key, 10 );
				if ( ! empty( $tax ) && ! empty( $value ) && is_string( $value ) ) {
					$attribute    = array( $tax => $value );
					$tr_attribute = PLLWC_Products::maybe_translate_attributes( $attribute, $lang );
					$value        = $tr_attribute[ $tax ];
				}
			} else {
				$props = self::get_legacy_metas( false );
				if ( isset( $props[ $key ] ) ) {
					$value = PLLWC_Products::maybe_translate_property( $value, $props[ $key ], $lang );
				}
			}

/**
			 * Filters a meta value before is copied or synchronized.
			 *
			 * @since 1.0
			 *
			 * @param mixed  $value Meta value.
			 * @param string $key   Meta key.
			 * @param string $lang  Language of target.
			 * @param int    $from  Id of the source.
			 * @param int    $to    Id of the target.
			 */
			$value = apply_filters( 'pllwc_translate_product_meta', $value, $key, $lang, $from, $to );
		}
		return $value;
	}

/**
	 * Copies properties (taxonomies and metas) from one product to another product.
	 *
	 * @since 1.0
	 *
	 * @param int    $from  Id of the product from which we copy informations.
	 * @param int    $to    Id of the product to which we copy informations.
	 * @param string $lang  Language code.
	 * @param bool   $sync  Optional, defaults to false. True if it is synchronization, false if it is a copy.
	 * @return void
	 */
	public function copy( $from, $to, $lang, $sync = false ) {
		global $wpdb;

// Synchronize the status for the variations.
		$post = get_post( $from );

if ( $post instanceof WP_Post && 'product_variation' === $post->post_type ) {
			$wpdb->update( $wpdb->posts, array( 'post_status' => $post->post_status ), array( 'ID' => $to ) );
		}

if ( isset( PLL()->sync ) ) {
			if ( ! $sync ) {
				PLL()->sync->taxonomies->copy( $from, $to, $lang );
			}

PLL()->sync->post_metas->copy( $from, $to, $lang, $sync );
		}

// Since WC 3.6 we also need to update the lookup table.
		$this->update_lookup_table( $to, 'wc_product_meta_lookup' );
	}

/**
	 * Synchronizes product ordering.
	 *
	 * @since 1.0
	 *
	 * @param int $id    Product id.
	 * @param int $order Product order.
	 * @return void
	 */
	public function save_product_ordering( $id, $order ) {
		global $wpdb;
		$wpdb->update( $wpdb->posts, array( 'menu_order' => $order ), array( 'ID' => $id ) );
	}

/**
	 * Returns the translation group name of a product (if it exists).
	 * This is the name of the associated taxonomy term.
	 *
	 * @since 1.0
	 *
	 * @param int $id Product id.
	 * @return string
	 */
	public function get_translation_group_name( $id ) {
		$term = $this->object->get_object_term( $id, 'post_translations' );
		return empty( $term ) ? '' : $term->name;
	}

/**
	 * Checks if a product sku is found for any other product id in a language.
	 * Modified version WC_Product_Data_Store_CPT::is_existing_sku().
	 * Code last checked: WC 4.0
	 *
	 * @since 1.0
	 *
	 * @param int    $product_id Product ID.
	 * @param string $sku        SKU Will be slashed to work around https://core.trac.wordpress.org/ticket/27421.
	 * @param string $lang       Language code.
	 * @return bool
	 */
	public function is_existing_sku( $product_id, $sku, $lang ) {
		global $wpdb;

$lang = PLL()->model->get_language( $lang );

if ( empty( $lang ) ) {
			return false;
		}

return (bool) $wpdb->get_var(
			$wpdb->prepare(
				"SELECT posts.ID
				FROM {$wpdb->posts} AS posts
				INNER JOIN {$wpdb->wc_product_meta_lookup} AS lookup ON posts.ID = lookup.product_id
				INNER JOIN {$wpdb->term_relationships} AS pll_tr ON pll_tr.object_id = posts.ID
				WHERE posts.post_type IN ( 'product', 'product_variation' )
					AND posts.post_status != 'trash'
					AND lookup.sku = %s
					AND lookup.product_id <> %d
					AND pll_tr.term_taxonomy_id = %d
				LIMIT 1",
				wp_slash( $sku ),
				$product_id,
				$lang->get_tax_prop( 'language', 'term_taxonomy_id' )
			)
		);
	}

/**
	 * Returns a product id based on the sku and the language.
	 * Modified version WC_Product_Data_Store_CPT::get_product_id_by_sku().
	 * Code last checked: WC 4.0
	 *
	 * @since 1.0
	 *
	 * @param string $sku  SKU.
	 * @param string $lang Language code.
	 * @return int Product id.
	 */
	public function get_product_id_by_sku( $sku, $lang ) {
		global $wpdb;

$lang = PLL()->model->get_language( $lang );

if ( empty( $lang ) ) {
			return 0;
		}

return $wpdb->get_var(
			$wpdb->prepare(
				"SELECT posts.ID
				FROM {$wpdb->posts} as posts
				INNER JOIN {$wpdb->wc_product_meta_lookup} AS lookup ON posts.ID = lookup.product_id
				INNER JOIN {$wpdb->term_relationships} AS pll_tr ON pll_tr.object_id = posts.ID
				WHERE posts.post_type IN ( 'product', 'product_variation' )
					AND posts.post_status != 'trash'
					AND lookup.sku = %s
					AND pll_tr.term_taxonomy_id = %d
				LIMIT 1",
				$sku,
				$lang->get_tax_prop( 'language', 'term_taxonomy_id' )
			)
		);
	}

/**
	 * When editing a term, check for product attributes.
	 *
	 * The method replaces WC_Post_Data::edit_term().
	 * A copy is needed because of the private property $editing_term.
	 * Code last checked: WC 4.0
	 *
	 * @since 1.2
	 *
	 * @param  int    $term_id  Term ID.
	 * @param  int    $tt_id    Term taxonomy ID.
	 * @param  string $taxonomy Taxonomy slug.
	 * @return void
	 */
	public static function edit_term( $term_id, $tt_id, $taxonomy ) {
		self::$editing_term = null;
		if ( strpos( $taxonomy, 'pa_' ) === 0 ) {
			$term = get_term_by( 'id', $term_id, $taxonomy );
			if ( $term instanceof WP_Term ) {
				self::$editing_term = $term;
			}
		}
	}

/**
	 * When a term is edited, check for product attributes and update variations.
	 *
	 * This is a modified version of WC_Post_Data::edited_term().
	 * The language is added to the query to take into account updates of attributes sharing the same slug.
	 * Code last checked: WC 4.0
	 *
	 * @since 1.2
	 *
	 * @param  int    $term_id  Term ID.
	 * @param  int    $tt_id    Term taxonomy ID.
	 * @param  string $taxonomy Taxonomy slug.
	 * @return void
	 */
	public function edited_term( $term_id, $tt_id, $taxonomy ) {
		global $wpdb;

if ( ! is_null( self::$editing_term ) && strpos( $taxonomy, 'pa_' ) === 0 ) {
			$edited_term = get_term_by( 'id', $term_id, $taxonomy );

if ( $edited_term instanceof WP_Term && $edited_term->slug !== self::$editing_term->slug ) {
				$language = pll_get_term_language( $term_id, 'language:term_taxonomy_id' );
				$language = absint( $language );

$wpdb->query(
					$wpdb->prepare(
						"UPDATE {$wpdb->postmeta} AS pm
						INNER JOIN {$wpdb->term_relationships} AS pll_tr ON pll_tr.object_id = pm.post_id
						SET meta_value = %s
						WHERE meta_key = %s
						AND meta_value = %s
						AND pll_tr.term_taxonomy_id = %d",
						$edited_term->slug,
						'attribute_' . sanitize_title( $taxonomy ),
						self::$editing_term->slug,
						$language
					)
				);

$wpdb->query(
					$wpdb->prepare(
						"UPDATE {$wpdb->postmeta} AS pm
						INNER JOIN {$wpdb->term_relationships} AS pll_tr ON pll_tr.object_id = pm.post_id
						SET meta_value = REPLACE( meta_value, %s, %s )
						WHERE meta_key = '_default_attributes'
						AND pll_tr.term_taxonomy_id = %d",
						serialize( self::$editing_term->taxonomy ) . serialize( self::$editing_term->slug ), // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.serialize_serialize
						serialize( $edited_term->taxonomy ) . serialize( $edited_term->slug ), // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.serialize_serialize
						$language
					)
				);
			}
		} else {
			self::$editing_term = null;
		}
	}
}

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