0a2db8dee1921406e9b9e6b41d0cfaa0eeb3ce9c

Committed 10 Feb 2025 02:14PM UTC coverage: 52.69% (-0.07%) from 52.764%

Build # 0a2db8dee1921406e9b9e6b41d0cfaa0eeb3ce9c

Build Type

Pull #1042

github

Committed by

web-flow

Commit Message

Merge 2b0b63406 into 7bca08177

Pull Request Pull Request #1042: Fix schema image block

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86.87

/classes/woocommerce-schema.php

<?php
/**
 * WooCommerce Yoast SEO plugin file.
 *
 * @package WPSEO/WooCommerce
 */

use Yoast\WP\SEO\Config\Schema_IDs;

/**
 * Class WPSEO_WooCommerce_Schema.
 */
class WPSEO_WooCommerce_Schema {

        /**
         * The schema data we're going to output.
         *
         * @var array<string,string|int|array<string,string|int>> $data
         */
        protected $data;

        /**
         * WooCommerce version number.
         *
         * @var string
         */
        protected $wc_version;

        /**
         * The list of product variation images.
         *
         * @var array <string,string>
         */
        private $variation_images;

        /**
         * The list of product attributes that are allowed in the schema.
         *
         * @var array <string>
         */
        private $allowed_product_attributes = [
                'color',
                'pattern',
                'material',
        ];

        /**
         * WPSEO_WooCommerce_Schema constructor.
         *
         * @param string $wc_version The WooCommerce version.
         */
        public function __construct( $wc_version = WC_VERSION ) {
                $this->wc_version       = $wc_version;
                $this->variation_images = [];

                /**
                 * Filter: 'wpseo_allowed_product_attributes' - Allow changing the allowed product attributes.
                 *
                 * @param array<string> $allowed_product_attributes The default product attributes allowed.
                 */
                $this->allowed_product_attributes = apply_filters( 'wpseo_allowed_product_attributes', $this->allowed_product_attributes );

                // Filters & actions below in order of execution.
                add_filter( 'wpseo_frontend_presenters', [ $this, 'remove_unneeded_presenters' ] );
                add_filter( 'wpseo_schema_webpage', [ $this, 'filter_webpage' ], 10, 1 );
                add_filter( 'wpseo_schema_organization', [ $this, 'filter_organization' ], 10, 1 );
                add_filter( 'woocommerce_structured_data_product', [ $this, 'change_product' ], 10, 2 );
                add_filter( 'woocommerce_structured_data_type_for_page', [ $this, 'remove_woo_breadcrumbs' ] );

                // Only needed for WooCommerce versions before 3.8.1.
                if ( version_compare( $this->get_wc_version(), '3.8.1' ) < 0 ) {
                        add_filter( 'woocommerce_structured_data_review', [ $this, 'change_reviewed_entity' ] );
                }

                add_action( 'wp_footer', [ $this, 'output_schema_footer' ] );
        }

        /**
         * Get the WooCommerce version.
         *
         * @return string The WooCommerce version.
         */
        public function get_wc_version() {
                return $this->wc_version;
        }

        /**
         * If this is a product page, remove some of the presenters so we don't output them.
         *
         * @param array<string> $presenters Array of presenters.
         *
         * @return array<string> Array of presenters.
         */
        public function remove_unneeded_presenters( $presenters ) {
                if ( is_product() ) {
                        foreach ( $presenters as $key => $object ) {
                                if (
                                        is_a( $object, 'Yoast\WP\SEO\Presenters\Open_Graph\Article_Publisher_Presenter' )
                                        || is_a( $object, 'Yoast\WP\SEO\Presenters\Open_Graph\Article_Author_Presenter' )
                                ) {
                                        unset( $presenters[ $key ] );
                                }
                        }
                }

                return $presenters;
        }

        /**
         * Should the yoast schema output be used.
         *
         * @return bool Whether the Yoast SEO schema should be output.
         */
        public static function should_output_yoast_schema() {
                // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals -- Using WPSEO hook.
                return apply_filters( 'wpseo_json_ld_output', true );
        }

        /**
         * Outputs the Woo Schema blob in the footer.
         *
         * @return bool False when there's nothing to output, true when we did output something.
         */
        public function output_schema_footer() {
                if ( ! is_array( $this->data ) || $this->data === [] ) {
                        return false;
                }

                // phpcs:disable WordPress.Security.EscapeOutput.OutputNotEscaped -- We need to output HTML. If we escape this we break it.
                echo new WPSEO_WooCommerce_Schema_Presenter(
                        [ $this->data ],
                        [
                                'yoast-schema-graph',
                                'yoast-schema-graph--woo',
                                'yoast-schema-graph--footer',
                        ]
                );

                // phpcs:enable

                return true;
        }

        /**
         * Changes the WebPage output to point to Product as the main entity.
         *
         * @param array<string,string|array<string>> $webpage_data Product Schema data.
         *
         * @return array<string,string|array<string>> Product Schema data.
         */
        public function filter_webpage( $webpage_data ) {
                if ( is_product() ) {
                        // We force the page type to be WebPage and ItemPage.
                        $webpage_data['@type'] = [ 'WebPage', 'ItemPage' ];
                        // We normally add a `ReadAction` on pages, we're replacing with a `BuyAction` on product pages.
                        $webpage_data['potentialAction'] = [
                                '@type'  => 'BuyAction',
                                'target' => YoastSEO()->meta->for_current_page()->canonical,
                        ];
                        unset( $webpage_data['datePublished'], $webpage_data['dateModified'] );
                }
                if ( is_checkout() || is_checkout_pay_page() ) {
                        $webpage_data['@type'] = 'CheckoutPage';
                        // We normally add a `ReadAction` on pages, adding that on a checkout makes no sense.
                        unset( $webpage_data['potentialAction'] );
                }

                return $webpage_data;
        }

        /**
         * Changes the Organization output to add a return policy if its available.
         *
         * @param array<string,string|array<string>> $organization_data Organization schema data.
         *
         * @return array<string,string|array<string>> Organization Schema data.
         */
        public function filter_organization( $organization_data ) {
                $schema_return_policy_id = WPSEO_Options::get( 'woo_schema_return_policy' );
                if ( ! empty( $schema_return_policy_id ) ) {
                        $url = get_permalink( $schema_return_policy_id );
                        if ( $url ) {
                                $organization_data['hasMerchantReturnPolicy'] = [
                                        '@type'              => 'MerchantReturnPolicy',
                                        'merchantReturnLink' => esc_url( $url ),
                                ];
                        }
                }

                return $organization_data;
        }

        /**
         * Changes the Review output to point to Product as the reviewed Item.
         *
         * @param array<string|array<string>> $data Review Schema data.
         *
         * @return array<string|array<string>> Review Schema data.
         */
        public function change_reviewed_entity( $data ) {
                unset( $data['@type'] );
                unset( $data['itemReviewed'] );

                $this->data['review'][] = $data;

                /**
                 * Filter: 'wpseo_schema_review' - Allow changing the Review type.
                 *
                 * @param array $data The Schema Review data.
                 */
                $this->data = apply_filters( 'wpseo_schema_review', $this->data );

                return [];
        }

        /**
         * Filter Schema Product data to work.
         *
         * @param array<string,string|int|array<string,string|int>> $data    Schema Product data.
         * @param WC_Product                                        $product Product object.
         *
         * @return array<string,string|int|array<string,string|int>> Schema Product data.
         */
        public function change_product( $data, $product ) {
                $data = $this->change_seller_in_offers( $data );
                $data = $this->filter_reviews( $data, $product );
                $data = $this->filter_sku( $data, $product );

                if ( $product instanceof WC_Product_Variable ) {
                        $data = $this->filter_variations( $data, $product );
                }
                else {
                        $data = $this->filter_offers( $data, $product );
                }

                // This product is the main entity of this page, so we set it as such.
                $data['mainEntityOfPage'] = [
                        '@id' => YoastSEO()->meta->for_current_page()->main_schema_id,
                ];

                // Now let's add this data to our overall output.
                $this->data = $data;

                $this->add_image();
                $this->add_variation_images();
                $this->add_brand( $product );
                $this->add_manufacturer( $product );
                $this->maybe_add_product_attributes( $product );
                $this->add_global_identifier( $product );

                /**
                 * Filter: 'wpseo_schema_product' - Allow changing the Product type.
                 *
                 * @param array $data The Schema Product data.
                 */
                $this->data = apply_filters( 'wpseo_schema_product', $this->data );

                return [];
        }

        /**
         * Filters the offers array to enrich it.
         *
         * @param array<string,string|int|array<string,string|int>> $data    Schema Product data.
         * @param WC_Product                                        $product The product.
         *
         * @return array<string,string|int|array<string,string|int>> Schema Product data.
         */
        protected function filter_offers( $data, $product ) {
                if ( ! isset( $data['offers'] ) || $data['offers'] === [] ) {
                        return $data;
                }

                $data['offers'] = $this->filter_sales( $data['offers'], $product );

                foreach ( $data['offers'] as $key => $offer ) {

                        // Add an @id to the offer.
                        $data['offers'][ $key ]['@id'] = YoastSEO()->meta->for_current_page()->site_url . '#/schema/offer/' . $product->get_id() . '-' . $key;

                        // WooCommerce 9.5.0 introduced the usage of UnitPriceSpecification for offers.
                        if ( version_compare( $this->get_wc_version(), '9.5.0' ) < 0 ) {
                                $price = WPSEO_WooCommerce_Utils::get_product_display_price( $product );
                                $this->add_price_specifications( $data, $key, $price );
                        }
                        else {
                                $this->add_unit_price_specifications( $data, $key, $offer['priceSpecification'], $product );

                        }

                        $data['offers'][ $key ]['seller'] = [ '@id' => YoastSEO()->meta->for_current_page()->site_url . '#organization' ];

                        // Remove price property from Schema output by WooCommerce.
                        if ( isset( $data['offers'][ $key ]['price'] ) ) {
                                unset( $data['offers'][ $key ]['price'] );
                        }
                        // Remove priceCurrency property from Schema output by WooCommerce.
                        if ( isset( $data['offers'][ $key ]['priceCurrency'] ) ) {
                                unset( $data['offers'][ $key ]['priceCurrency'] );
                        }

                        // Alter availability when product is "on backorder".
                        if ( $product->is_on_backorder() ) {
                                $data['offers'][ $key ]['availability'] = 'https://schema.org/PreOrder';
                        }
                }

                // We don't want an array with keys, we just need the offers.
                $data['offers'] = array_values( $data['offers'] );

                return $data;
        }

        /**
         * Filters the offers array to wrap and enrich it.
         *
         * @param array<string,string|int|array<string,string|int>> $data    Schema Product data.
         * @param WC_Product                                        $product The product.
         *
         * @return array<string,string|int|array<string,string|int>> Schema Product data.
         */
        protected function filter_variations( $data, $product ) {
                if ( ! isset( $data['offers'] ) || $data['offers'] === [] ) {
                        return $data;
                }

                $data['@type'] = 'ProductGroup';
                if ( isset( $data['sku'] ) ) {
                        $data['productGroupID'] = $data['sku'];
                }
                $data['hasVariant'] = [];
                unset( $data['offers'] );

                $product_variations = $product->get_available_variations( 'object' );
                foreach ( $product_variations as $key => $variation ) {
                        $variant_schema = $this->add_individual_product_variation( $product, $variation, $key );
                        if ( isset( $variant_schema['image'] ) ) {
                                $this->variation_images[] = [ '@id' => $variant_schema['image']['@id'] ];
                        }
                        $data['hasVariant'][] = $variant_schema;
                }

                // We don't want an array with keys, we just need the offers.
                $data['hasVariant'] = array_values( $data['hasVariant'] );

                return $data;
        }

        /**
         * Filters the offers array on sales, possibly unset them.
         *
         * @param array<string,string|int|array<string,string|int>> $offers  Schema Offer data.
         * @param WC_Product                                        $product The product.
         *
         * @return array<string,string|int|array<string,string|int>> Schema Offer data.
         */
        protected function filter_sales( $offers, $product ) {
                foreach ( $offers as $key => $offer ) {
                        /*
                         * WooCommerce assumes all prices will be valid until the end of next year,
                         * unless on sale and there is an end date. We keep the `priceValidUntil`
                         * property only for products with a sale price and a sale end date.
                         */

                        if ( ! $product->is_on_sale() || ! $product->get_date_on_sale_to() ) {
                                unset( $offers[ $key ]['priceValidUntil'] );
                        }
                }

                return $offers;
        }

        /**
         * Removes the SKU when it's empty to prevent the WooCommerce fallback to the product's ID.
         *
         * @param array<string,string|int|array<string,string|int>> $data    Schema Product data.
         * @param WC_Product                                        $product The product.
         *
         * @return array<string,string|int|array<string,string|int>> Schema Product data.
         */
        protected function filter_sku( $data, $product ) {
                /*
                 * When the SKU of a product is left empty, WooCommerce makes it the value of the product's id.
                 * In this method we check for that and unset it if done so.
                 */
                if ( empty( $product->get_sku() ) ) {
                        unset( $data['sku'] );
                }

                return $data;
        }

        /**
         * Removes the Woo Breadcrumbs from their Schema output.
         *
         * @param array<string> $types Types of Schema Woo will render.
         *
         * @return array<string> Types of Schema Woo will render.
         */
        public function remove_woo_breadcrumbs( $types ) {
                foreach ( $types as $key => $type ) {
                        if ( $type === 'breadcrumblist' ) {
                                unset( $types[ $key ] );
                        }
                }

                return $types;
        }

        /**
         * Retrieve the global identifier type and value if we have one.
         *
         * @param WC_Product $product Product object.
         *
         * @return bool True on success, false on failure.
         */
        protected function add_global_identifier( $product ) {
                $product_id               = $product->get_id();
                $global_identifier_values = get_post_meta( $product_id, 'wpseo_global_identifier_values', true );

                if ( ! is_array( $global_identifier_values ) || $global_identifier_values === [] ) {
                        return false;
                }

                foreach ( $global_identifier_values as $type => $value ) {
                        if ( empty( $value ) ) {
                                continue;
                        }
                        $this->data[ $type ] = $value;
                        if ( $type === 'isbn' ) {
                                if ( ! isset( $this->data['@type'] ) ) {
                                        $this->data['@type'] = 'Product';
                                }
                                if ( ! is_array( $this->data['@type'] ) ) {
                                        $this->data['@type'] = [ $this->data['@type'] ];
                                }
                                $this->data['@type'] = array_merge( [ 'Book' ], $this->data['@type'] );
                        }
                }

                return true;
        }

        /**
         * Update the seller attribute to reference the Organization, when it is set.
         *
         * @param array<string,string|int|array<string,string|int>> $data Schema Product data.
         *
         * @return array<string,string|int|array<string,string|int>> Schema Product data.
         */
        protected function change_seller_in_offers( $data ) {
                $company_or_person = WPSEO_Options::get( 'company_or_person', false );
                $company_name      = WPSEO_Options::get( 'company_name' );

                if ( $company_or_person !== 'company' || empty( $company_name ) ) {
                        return $data;
                }

                if ( ! empty( $data['offers'] ) ) {
                        foreach ( $data['offers'] as $key => $offer ) {
                                $data['offers'][ $key ]['seller'] = [
                                        '@id' => trailingslashit( YoastSEO()->meta->for_current_page()->site_url ) . Schema_IDs::ORGANIZATION_HASH,
                                ];
                        }
                }

                return $data;
        }

        /**
         * Add brand to our output.
         *
         * @param WC_Product $product Product object.
         *
         * @return void
         */
        private function add_brand( $product ) {
                $schema_brand = WPSEO_Options::get( 'woo_schema_brand' );
                if ( ! empty( $schema_brand ) ) {
                        $this->add_attribute_as( 'brand', $product, $schema_brand, 'Brand' );
                }
        }

        /**
         * Add manufacturer to our output.
         *
         * @param WC_Product $product Product object.
         *
         * @return void
         */
        private function add_manufacturer( $product ) {
                $schema_manufacturer = WPSEO_Options::get( 'woo_schema_manufacturer' );
                if ( ! empty( $schema_manufacturer ) ) {
                        $this->add_attribute_as( 'manufacturer', $product, $schema_manufacturer );
                }
        }

        /**
         * Adds an attribute to our Product data array with the value from a taxonomy, as an Organization,
         *
         * @param string     $attribute The attribute we're adding to Product.
         * @param WC_Product $product   The WooCommerce product we're working with.
         * @param string     $taxonomy  The taxonomy to get the attribute's value from.
         * @param string     $type      The Schema type to use.
         *
         * @return void
         */
        private function add_attribute_as( $attribute, $product, $taxonomy, $type = 'Organization' ) {
                $term = $this->get_primary_term_or_first_term( $taxonomy, $product->get_id() );

                if ( $term !== null ) {
                        $this->data[ $attribute ] = [
                                '@type' => $type,
                                'name'  => wp_strip_all_tags( $term->name ),
                        ];
                }
        }

        /**
         * Adds image schema.
         *
         * @return void
         */
        private function add_image() {
                /**
                 * WooCommerce will set the image to false if none is available. This is incorrect schema and we should fix it
                 * for our users for now.
                 *
                 * See https://github.com/woocommerce/woocommerce/issues/24188.
                 */
                if ( isset( $this->data['image'] ) && $this->data['image'] === false ) {
                        unset( $this->data['image'] );
                }

                if ( has_post_thumbnail() ) {
                        $this->data['image'] = [
                                '@id' => YoastSEO()->meta->for_current_page()->canonical . Schema_IDs::PRIMARY_IMAGE_HASH,
                        ];

                        return;
                }

                // Fallback to WooCommerce placeholder image.
                if ( function_exists( 'wc_placeholder_img_src' ) ) {
                        $image_schema_id     = YoastSEO()->meta->for_current_page()->canonical . '#woocommerceimageplaceholder';
                        $placeholder_img_src = wc_placeholder_img_src();
                        $this->data['image'] = YoastSEO()->helpers->schema->image->generate_from_url( $image_schema_id, $placeholder_img_src, '', false, false );
                }
        }

        /**
         * Adds image schema for product variations to main node.
         *
         * @return void
         */
        private function add_variation_images() {
                $image_list = [];
                if ( is_array( $this->variation_images ) && count( $this->variation_images ) !== 0 ) {
                        $image_list[] = $this->data['image'];
                        foreach ( $this->variation_images as $image ) {
                                $image_list[] = $image;
                        }
                        $this->data['image'] = $image_list;
                }
        }

        /**
         * Adds the product attributes to the Schema output.
         *
         * @param WC_Product $product The product object.
         *
         * @return void
         */
        private function maybe_add_product_attributes( $product ) {
                if ( $product->get_type() === 'variable' ) {
                        return;
                }

                $attributes     = $product->get_attributes();
                $product_schema = $this->data;

                foreach ( $attributes as $attribute ) {
                        $attribute_name = strtolower( wc_attribute_label( $attribute->get_name() ) );

                        if ( ! in_array( $attribute_name, $this->allowed_product_attributes, true ) ) {
                                continue;
                        }

                        $attribute_options     = $attribute->get_options();
                        $attribute_value_label = $this->get_attribute_label( reset( $attribute_options ) );

                        if ( ! empty( $attribute_value_label ) ) {
                                $product_schema[ $attribute_name ] = $attribute_value_label;
                        }
                }

                $this->data = $product_schema;
        }

        /**
         * Get the label of an attribute value.
         *
         * @param int $attribute_value_id The attribute values id.
         *
         * @return string|null The attribute value label.
         */
        private function get_attribute_label( $attribute_value_id ) {
                        $term = get_term( $attribute_value_id );
                if ( ! is_wp_error( $term ) && $term ) {
                        return $term->name;
                }

                return null;
        }

        /**
         * Tries to get the primary term, then the first term, null if none found.
         *
         * @param string $taxonomy_name Taxonomy name for the term.
         * @param int    $post_id       Post ID for the term.
         *
         * @return WP_Term|null The primary term, the first term or null.
         */
        protected function get_primary_term_or_first_term( $taxonomy_name, $post_id ) {
                $primary_term    = new WPSEO_Primary_Term( $taxonomy_name, $post_id );
                $primary_term_id = $primary_term->get_primary_term();

                if ( $primary_term_id !== false ) {
                        $primary_term = get_term( $primary_term_id );
                        if ( $primary_term instanceof WP_Term ) {
                                return $primary_term;
                        }
                }

                $terms = get_the_terms( $post_id, $taxonomy_name );

                if ( is_array( $terms ) && count( $terms ) > 0 ) {
                        return $terms[0];
                }

                return null;
        }

        /**
         * Adds the individual product variants as variants of the offer.
         *
         * @param WC_Product           $product   The WooCommerce Product we're working with.
         * @param WC_Product_Variation $variation The WooCommerce variation we're working with.
         * @param int                  $key       The nth product variation.
         *
         * @return array<string|int|array<string|int>> Schema Offers data.
         */
        protected function add_individual_offer( $product, $variation, $key ) {

                $currency           = get_woocommerce_currency();
                $tax_enabled        = wc_tax_enabled();
                $prices_include_tax = WPSEO_WooCommerce_Utils::prices_have_tax_included();
                $decimals           = wc_get_price_decimals();
                $product_id         = $product->get_id();
                $product_name       = $product->get_name();
                $variation_name     = implode( ' / ', $variation->get_attributes() );

                $offer = [
                        '@type'              => 'Offer',
                        '@id'                => YoastSEO()->meta->for_current_page()->site_url . '#/schema/offer/' . $product_id . '-' . $key,
                        'name'               => $product_name . ' - ' . $variation_name,
                        'url'                => get_permalink( $variation->get_id() ),
                        'priceSpecification' => [
                                '@type'         => 'PriceSpecification',
                                'price'         => wc_format_decimal( $variation->get_price(), $decimals ),
                                'priceCurrency' => $currency,
                        ],
                ];

                if ( $tax_enabled ) {
                        $offer['priceSpecification']['valueAddedTaxIncluded'] = $prices_include_tax;
                }

                if ( ! $product->is_on_sale() || ! $product->get_date_on_sale_to() ) {
                        unset( $offer['priceValidUntil'] );
                }

                if ( $product->is_on_backorder() ) {
                        $offer['availability'] = 'https://schema.org/PreOrder';
                }

                /**
                 * Filter: 'wpseo_schema_offer' - Allow changing the offer schema.
                 *
                 * @param array<string|int|array<string|int>> $offer     The schema offer data.
                 * @param WC_Product_Variation                $variation The WooCommerce product variation we're working with.
                 * @param WC_Product                          $product   The WooCommerce product we're working with.
                 */
                $data = apply_filters( 'wpseo_schema_offer', $offer, $variation, $product );

                if ( is_array( $data ) ) {
                        return $data;
                }

                return $offer;
        }

        /**
         * Adds the individual product variants.
         *
         * @param WC_Product           $product   The WooCommerce product we're working with.
         * @param WC_Product_Variation $variation The variation data.
         * @param int                  $key       The nth product variation data.
         *
         * @return array<string,string|int|array<string,string|int>> Schema Product data.
         */
        protected function add_individual_product_variation( $product, $variation, $key ) {
                $product_id         = $product->get_id();
                $product_name       = $product->get_name();
                $product_global_ids = get_post_meta( $product_id, 'wpseo_global_identifier_values', true );

                $variation_attributes = $variation->get_attributes();
                $variation_name       = implode( ' / ', $variation_attributes );

                $product_schema = [
                        '@type' => 'Product',
                        '@id'   => YoastSEO()->meta->for_current_page()->site_url . '#/product/' . $product_id . '-' . $key,
                        'name'  => $product_name . ' - ' . $variation_name,
                        'url'   => get_permalink( $variation->get_id() ),
                        'image' => $this->add_variation_image( $variation ),

                ];

                // Add the color, pattern and material attributes to the schema (if present).
                foreach ( $variation_attributes as $attribute => $value ) {
                        $attribute_name = strtolower( wc_attribute_label( $attribute ) );

                        if ( in_array( $attribute_name, $this->allowed_product_attributes, true ) ) {
                                $product_schema[ $attribute_name ] = $value;
                        }
                }

                if ( $variation->get_sku() ) {
                        $product_schema['sku'] = $variation->get_sku();
                }

                if ( $variation->get_description() !== '' ) {
                        $product_schema['description'] = YoastSEO()->helpers->string->strip_all_tags( stripslashes( $variation->get_description() ) );
                }
                // Adds variation's global identifiers to the $offer array.
                $variation_global_ids    = get_post_meta( $variation->get_id(), 'wpseo_variation_global_identifiers_values', true );
                $global_identifier_types = [
                        'gtin8',
                        'gtin12',
                        'gtin13',
                        'gtin14',
                        'mpn',
                ];

                foreach ( $global_identifier_types as $global_identifier_type ) {
                        if ( isset( $variation_global_ids[ $global_identifier_type ] ) && ! empty( $variation_global_ids[ $global_identifier_type ] ) ) {
                                $product_schema[ $global_identifier_type ] = $variation_global_ids[ $global_identifier_type ];
                        }
                        elseif ( isset( $product_global_ids[ $global_identifier_type ] ) && ! empty( $product_global_ids[ $global_identifier_type ] ) ) {
                                $product_schema[ $global_identifier_type ] = $product_global_ids[ $global_identifier_type ];
                        }
                }

                $product_schema['offers'] = $this->add_individual_offer( $product, $variation, $key );

                return $product_schema;
        }

        /**
         * Adds image schema for a product variation.
         *
         * @param WC_Product_Variation $variation The variation data.
         *
         * @return array<string,string> The imageObject schema.
         */
        private function add_variation_image( $variation ) {
                $image_id             = $variation->get_image_id();
                $base_image_schema_id = YoastSEO()->meta->for_current_page()->canonical;

                // Fallback to WooCommerce placeholder image.
                if ( empty( $image_id ) && function_exists( 'wc_placeholder_img_src' ) ) {
                        $image_schema_id     = "$base_image_schema_id#woocommerceimageplaceholder";
                        $placeholder_img_src = wc_placeholder_img_src();

                        return YoastSEO()->helpers->schema->image->generate_from_url( $image_schema_id, $placeholder_img_src, '', false, false );
                }

                $metadata      = YoastSEO()->helpers->image->get_metadata( $image_id );
                $image_title   = wp_basename( $metadata['file'] );
                $image_caption = $metadata['image_meta']['caption'];

                $image_schema_id = "$base_image_schema_id#$image_title";
                return YoastSEO()->helpers->schema->image->generate_from_attachment_id( $image_schema_id, $image_id, $image_caption );
        }

        /**
         * Adds the VAT to the price specification.
         *
         * @param array<string,string|int|array<string,string|int>> $price_specification The price specification object.
         *
         * @return void
         */
        private function maybe_add_vat( &$price_specification ) {
                if ( ! is_array( $price_specification ) ) {
                        return;
                }

                if ( wc_tax_enabled() ) {
                        $price_specification['valueAddedTaxIncluded'] = WPSEO_WooCommerce_Utils::prices_have_tax_included();
                }
                elseif ( isset( $price_specification['valueAddedTaxIncluded'] ) ) {
                                unset( $price_specification['valueAddedTaxIncluded'] );
                }
        }

        /**
         * Adds the price specification to the Schema Product data in case it is expressed with UnitPriceSpecification objects.
         *
         * @param array<string,string|int|array<string,string|int>> $data                 Schema Product data.
         * @param int                                               $key                  The current offer key.
         * @param array<array<string,string|int>>                   $price_specifications The price specification object.
         * @param WC_Product                                        $product              The WooCommerce product we're working with.
         * @return void
         */
        private function add_unit_price_specifications( &$data, $key, $price_specifications, $product ) {
                foreach ( $price_specifications as &$price_specification ) {
                        $this->maybe_add_vat( $price_specification );
                        // We don't support WooCommerce validThrough date for ListPrice as it will be set by default to the end of the next year.
                        if ( $this->is_sale_date_specified( $product ) && ! $this->is_list_price( $price_specification ) ) {
                                continue;
                        }

                        if ( isset( $price_specification['validThrough'] ) ) {
                                unset( $price_specification['validThrough'] );
                        }
                }
                $data['offers'][ $key ]['priceSpecification'] = $price_specifications;
        }

        /**
         *  Adds the price specification to the Schema Product data.
         *
         * @param array<string,string|int|array<string,string|int>> $data  Schema Product data.
         * @param int                                               $key   The current offer key.
         * @param float                                             $price The price associated to the offer.
         * @return void
         */
        private function add_price_specifications( &$data, $key, $price ) {

                $data['offers'][ $key ]['priceSpecification']['@type'] = 'PriceSpecification';
                $data['offers'][ $key ]['priceSpecification']['price'] = $price;

                $this->maybe_add_vat( $data['offers'][ $key ]['priceSpecification'] );
        }

        /**
         * Enhances the review data output by WooCommerce.
         *
         * @param array<string,string|int|array<string,string|int>> $data    Review Schema data.
         * @param WC_Product                                        $product The WooCommerce product we're working with.
         *
         * @return array<string,string|int|array<string,string|int>> Review Schema data.
         */
        protected function filter_reviews( $data, $product ) {
                if ( ! isset( $data['review'] ) || $data['review'] === [] ) {
                        return $data;
                }

                $product_id   = $product->get_id();
                $product_name = $product->get_name();

                foreach ( $data['review'] as $key => $review ) {
                        $data['review'][ $key ]['@id']  = YoastSEO()->meta->for_current_page()->site_url . '#/schema/review/' . $product_id . '-' . $key;
                        $data['review'][ $key ]['name'] = $product_name;
                }

                return $data;
        }

        /**
         * Check if the product is on sale and the sale end date is specified.
         *
         * @param WC_Product $product The WooCommerce product we're working with.
         * @return bool True if the product is on sale and the sale end date is specified, false otherwise.
         */
        protected function is_sale_date_specified( $product ) {
                return $product->is_on_sale() && $product->get_date_on_sale_to();
        }

        /**
         * Check if the price specification is a ListPrice.
         *
         * @param array<string,string|int> $price_specification The price specification object.
         * @return bool True if the price specification is a ListPrice, false otherwise.
         */
        protected function is_list_price( $price_specification ) {
                return isset( $price_specification['priceType'] ) && $price_specification['priceType'] === 'https://schema.org/ListPrice';
        }
}

Yoast / wpseo-woocommerce / 0a2db8dee1921406e9b9e6b41d0cfaa0eeb3ce9c

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