class-wcml-mix-and-match-products.php

<?php

class WCML_Mix_and_Match_Products {

    public function __construct() {
        add_action( 'updated_post_meta', [ $this, 'sync_mnm_data' ], 10, 4 );
        add_filter( 'wcml_update_cart_contents_lang_switch', [ $this, 'sync_mnm_cart' ], 10, 3 );
    }

    public function sync_mnm_data( $meta_id, $post_id, $meta_key, $meta_value ) {
        if ( '_mnm_data' !== $meta_key ) {
            return;
        }

        global $sitepress, $woocommerce_wpml;

        $post = get_post( $post_id );

        // Skip auto-drafts, skip autosave.
        if ( 'auto-draft' === $post->post_status || isset( $_POST['autosave'] ) ) {
            return;
        }

        if ( 'product' === $post->post_type ) {
            remove_action( 'updated_post_meta', [ $this, 'sync_mnm_data' ], 10 );

            if ( $woocommerce_wpml->products->is_original_product( $post_id ) ) {
                $original_product_id = $post_id;
            } else {
                $original_product_id = $woocommerce_wpml->products->get_original_product_id( $post_id );
            }

            $mnm_data             = maybe_unserialize( get_post_meta( $original_product_id, '_mnm_data', true ) );
            $product_trid         = $sitepress->get_element_trid( $original_product_id, 'post_product' );
            $product_translations = $sitepress->get_element_translations( $product_trid, 'post_product' );

            foreach ( $product_translations as $product_translation ) {
                if ( empty( $product_translation->original ) ) {
                    foreach ( $mnm_data as $key => $mnm_element ) {

                        $trnsl_prod                = apply_filters( 'translate_object_id', $key, 'product', true, $product_translation->language_code );
                        $mnm_element['product_id'] = $trnsl_prod;
                        $mnm_data[ $trnsl_prod ]   = $mnm_element;
                        unset( $mnm_data[ $key ] );
                    }

                    update_post_meta( $product_translation->element_id, '_mnm_data', $mnm_data );
                }
            }

            add_action( 'updated_post_meta', [ $this, 'sync_mnm_data' ], 10, 4 );
        }
    }

    /**
     * @param $cart_item array
     *
     * @param array $cart_item
     * @param string $new_key
     */
    public function sync_mnm_cart( $cart_contents, $key, $new_key ) {

        global $sitepress;

        $current_language = $sitepress->get_current_language();

        // Translate container.
        if ( wc_mnm_is_container_cart_item( $cart_contents[ $key ] ) ) {

            $new_config = array();

            // Translate config.
            foreach( $cart_contents[ $key ][ 'mnm_config'] as $id => $data ) {

                $tr_product_id   = apply_filters( 'translate_object_id', $data['product_id'], 'product', false, $current_language );
                $tr_variation_id = 0;

                if ( isset( $data['variation_id'] ) && $data['variation_id'] ) {
                    $tr_variation_id = apply_filters( 'translate_object_id', $data['variation_id'], 'product_variation', false, $current_language );
                }

                $tr_child_id = $tr_variation_id ? intval( $tr_variation_id ) : intval( $tr_product_id );

                $new_config[ $tr_child_id ] = array(
                    'mnm_child_id' => $tr_child_id,
                    'product_id'   => intval( $tr_product_id ),
                    'variation_id' => intval( $tr_variation_id ),
                    'quantity'     => $data[ 'quantity' ],
                    'variation'    => $data[ 'variation' ], // @todo: translate attributes
                );

            }

            if ( ! empty( $new_config ) ) {
                $cart_contents[ $key ][ 'mnm_config'] = $new_config;
            }

            // Find all children and update with new container cart key.
            foreach ( wc_mnm_get_child_cart_items( $cart_contents[ $key ] ) as $child_key => $child_item ) {
                $cart_contents[ $child_key ][ 'mnm_container' ] = $new_key;
            }

        }

        // Translate children.
        if ( wc_mnm_maybe_is_child_cart_item( $cart_contents[ $key ] ) ) {

            $container_key = wc_mnm_get_cart_item_container( $cart_contents[ $key ], false, true );

            if ( $container_key ) {
                unset( $cart_contents[ $container_key ][ 'mnm_contents'][ $key ] );
                $cart_contents[ $container_key ][ 'mnm_contents'][] = $new_key;
            }

        }

        return $cart_contents;

    }

}