mpty( $images ) ) {
            $images[] = [
                'id'                => 0,
                'date_created'      => wc_rest_prepare_date_response( current_time( 'mysql' ), false ),
                // Default to now.
                'date_created_gmt'  => wc_rest_prepare_date_response( time() ),
                // Default to now.
                'date_modified'     => wc_rest_prepare_date_response( current_time( 'mysql' ), false ),
                'date_modified_gmt' => wc_rest_prepare_date_response( time() ),
                'src'               => wc_placeholder_img_src(),
                'name'              => __( 'Placeholder', 'dokan-lite' ),
                'alt'               => __( 'Placeholder', 'dokan-lite' ),
                'position'          => 0,
            ];
        }

        return $images;
    }

    /**
     * Get attribute taxonomy label.
     *
     * @param string $name Taxonomy name.
     *
     * @return string
     * @deprecated 2.8.0
     */
    protected function get_attribute_taxonomy_label( $name ) {
        $tax    = get_taxonomy( $name );
        $labels = get_taxonomy_labels( $tax );

        return $labels->singular_name;
    }

    /**
     * Get product attribute taxonomy name.
     *
     * @param string $slug Taxonomy name.
     * @param WC_Product $product Product data.
     *
     * @since  2.8.0
     * @return string
     */
    protected function get_attribute_taxonomy_name( $slug, $product ) {
        $attributes = $product->get_attributes();

        if ( ! isset( $attributes[ $slug ] ) ) {
            return str_replace( 'pa_', '', $slug );
        }

        $attribute = $attributes[ $slug ];

        // Taxonomy attribute name.
        if ( $attribute->is_taxonomy() ) {
            $taxonomy = $attribute->get_taxonomy_object();

            return $taxonomy->attribute_label;
        }

        // Custom product attribute name.
        return $attribute->get_name();
    }

    /**
     * Get default attributes.
     *
     * @param WC_Product $product Product instance.
     *
     * @return array
     */
    protected function get_default_attributes( $product ) {
        $default = [];

        if ( $product->is_type( 'variable' ) ) {
            foreach ( array_filter( (array) $product->get_default_attributes(), 'strlen' ) as $key => $value ) {
                if ( 0 === strpos( $key, 'pa_' ) ) {
                    $default[] = [
                        'id'     => wc_attribute_taxonomy_id_by_name( $key ),
                        'name'   => $this->get_attribute_taxonomy_name( $key, $product ),
                        'option' => $value,
                    ];
                } else {
                    $default[] = [
                        'id'     => 0,
                        'name'   => $this->get_attribute_taxonomy_name( $key, $product ),
                        'option' => $value,
                    ];
                }
            }
        }

        return $default;
    }

    /**
     * Get attribute options.
     *
     * @param int $product_id Product ID.
     * @param array $attribute Attribute data.
     *
     * @return array
     */
    protected function get_attribute_options( $product_id, $attribute ) {
        if ( isset( $attribute['is_taxonomy'] ) && $attribute['is_taxonomy'] ) {
            return wc_get_product_terms(
                $product_id, $attribute['name'], [
                    'fields' => 'names',
                ]
            );
        } elseif ( isset( $attribute['value'] ) ) {
            return array_map( 'trim', explode( '|', $attribute['value'] ) );
        }

        return [];
    }

    /**
     * Get the attributes for a product or product variation.
     *
     * @param WC_Product|WC_Product_Variation $product Product instance.
     *
     * @return array
     */
    protected function get_attributes( $product ) {
        $attributes = [];

        if ( $product->is_type( 'variation' ) ) {
            $_product = wc_get_product( $product->get_parent_id() );
            foreach ( $product->get_variation_attributes() as $attribute_name => $attribute ) {
                $name = str_replace( 'attribute_', '', $attribute_name );

                if ( ! $attribute ) {
                    continue;
                }

                // Taxonomy-based attributes are prefixed with `pa_`, otherwise simply `attribute_`.
                if ( 0 === strpos( $attribute_name, 'attribute_pa_' ) ) {
                    $option_term  = get_term_by( 'slug', $attribute, $name );
                    $attributes[] = [
                        'id'     => wc_attribute_taxonomy_id_by_name( $name ),
                        'slug'   => $attribute_name,
                        'name'   => $this->get_attribute_taxonomy_name( $name, $_product ),
                        'option' => $option_term && ! is_wp_error( $option_term ) ? $option_term->name : $attribute,
                    ];
                } else {
                    $attributes[] = [
                        'id'     => 0,
                        'slug'   => $attribute_name,
                        'name'   => $this->get_attribute_taxonomy_name( $name, $_product ),
                        'option' => $attribute,
                    ];
                }
            }
        } else {
            foreach ( $product->get_attributes() as $attribute ) {
                $attributes[] = [
                    'id'        => $attribute['is_taxonomy'] ? wc_attribute_taxonomy_id_by_name( $attribute['name'] ) : 0,
                    'slug'      => $attribute['name'],
                    'name'      => $this->get_attribute_taxonomy_name( $attribute['name'], $product ),
                    'position'  => (int) $attribute['position'],
                    'visible'   => (bool) $attribute['is_visible'],
                    'variation' => (bool) $attribute['is_variation'],
                    'options'   => $this->get_attribute_options( $product->get_id(), $attribute ),
                ];
            }
        }

        return $attributes;
    }

    /**
     * Get the downloads for a product or product variation.
     *
     * @param WC_Product|WC_Product_Variation $product Product instance.
     *
     * @return array
     */
    protected function get_downloads( $product ) {
        $downloads = [];

        if ( $product->is_downloadable() ) {
            foreach ( $product->get_downloads() as $file_id => $file ) {
                $downloads[] = [
                    'id'   => $file_id, // MD5 hash.
                    'name' => $file['name'],
                    'file' => $file['file'],
                ];
            }
        }

        return $downloads;
    }

    /**
     * Set product images.
     *
     * @param WC_Product $product Product instance.
     * @param array $images Images data.
     *
     * @return WC_Product
     * @throws WC_REST_Exception REST API exceptions.
     */
    protected function set_product_images( $product, $images ) {
        $images = is_array( $images ) ? array_filter( $images ) : [];

        if ( ! empty( $images ) ) {
            $gallery = [];

            foreach ( $images as $image ) {
                $attachment_id = isset( $image['id'] ) ? absint( $image['id'] ) : 0;

                if ( 0 === $attachment_id && isset( $image['src'] ) ) {
                    $upload = wc_rest_upload_image_from_url( esc_url_raw( $image['src'] ) );

                    if ( is_wp_error( $upload ) ) {
                        if ( ! apply_filters( 'woocommerce_rest_suppress_image_upload_error', false, $upload, $product->get_id(), $images ) ) {
                            throw new WC_REST_Exception( 'woocommerce_product_image_upload_error', $upload->get_error_message(), 400 );
                        } else {
                            continue;
                        }
                    }

                    $attachment_id = wc_rest_set_uploaded_image_as_attachment( $upload, $product->get_id() );
                }

                if ( ! wp_attachment_is_image( $attachment_id ) ) {
                    /* translators: %s: attachment id */
                    throw new WC_REST_Exception( 'woocommerce_product_invalid_image_id', sprintf( __( '#%s is an invalid image ID.', 'dokan-lite' ), $attachment_id ), 400 );
                }

                if ( isset( $image['position'] ) && 0 === absint( $image['position'] ) ) {
                    $product->set_image_id( $attachment_id );
                } else {
                    $gallery[] = $attachment_id;
                }

                // Set the image alt if present.
                if ( ! empty( $image['alt'] ) ) {
                    update_post_meta( $attachment_id, '_wp_attachment_image_alt', wc_clean( $image['alt'] ) );
                }

                // Set the image name if present.
                if ( ! empty( $image['name'] ) ) {
                    wp_update_post(
                        [
                            'ID'         => $attachment_id,
                            'post_title' => $image['name'],
                        ]
                    );
                }

                // Set the image source if present, for future reference.
                if ( ! empty( $image['src'] ) ) {
                    update_post_meta( $attachment_id, '_wc_attachment_source', esc_url_raw( $image['src'] ) );
                }
            }

            $product->set_gallery_image_ids( $gallery );
        } else {
            $product->set_image_id( '' );
            $product->set_gallery_image_ids( [] );
        }

        return $product;
    }

    /**
     * Save product shipping data.
     *
     * @param WC_Product $product Product instance.
     * @param array $data Shipping data.
     *
     * @return WC_Product
     */
    protected function save_product_shipping_data( $product, $data ) {
        // Virtual.
        if ( isset( $data['virtual'] ) && true === $data['virtual'] ) {
            $product->set_weight( '' );
            $product->set_height( '' );
            $product->set_length( '' );
            $product->set_width( '' );
        } else {
            if ( isset( $data['weight'] ) ) {
                $product->set_weight( $data['weight'] );
            }

            // Height.
            if ( isset( $data['dimensions']['height'] ) ) {
                $product->set_height( $data['dimensions']['height'] );
            }

            // Width.
            if ( isset( $data['dimensions']['width'] ) ) {
                $product->set_width( $data['dimensions']['width'] );
            }

            // Length.
            if ( isset( $data['dimensions']['length'] ) ) {
                $product->set_length( $data['dimensions']['length'] );
            }
        }

        // Shipping class.
        if ( isset( $data['shipping_class'] ) ) {
            $data_store        = $product->get_data_store();
            $shipping_class_id = $data_store->get_shipping_class_id_by_slug( wc_clean( $data['shipping_class'] ) );
            $product->set_shipping_class_id( $shipping_class_id );
        }

        return $product;
    }

    /**
     * Save downloadable files.
     *
     * @param WC_Product $product Product instance.
     * @param array $downloads Downloads data.
     * @param int $deprecated Deprecated since 3.0.
     *
     * @return WC_Product
     */
    protected function save_downloadable_files( $product, $downloads, $deprecated = 0 ) {
        if ( $deprecated ) {
            wc_deprecated_argument( 'variation_id', '3.0', 'save_downloadable_files() not requires a variation_id anymore.' );
        }

        $files = [];
        foreach ( $downloads as $key => $file ) {
            if ( empty( $file['file'] ) ) {
                continue;
            }

            $download = new WC_Product_Download();
            $download->set_id( $key );
            $download->set_name( $file['name'] ? $file['name'] : wc_get_filename_from_url( $file['file'] ) );
            $download->set_file( apply_filters( 'woocommerce_file_download_path', $file['file'], $product, $key ) );
            $files[] = $download;
        }
        $product->set_downloads( $files );

        return $product;
    }

    /**
     * Save taxonomy terms.
     *
     * @param WC_Product $product Product instance.
     * @param array $terms Terms data.
     * @param string $taxonomy Taxonomy name.
     *
     * @return WC_Product
     */
    protected function save_taxonomy_terms( $product, $terms, $taxonomy = 'cat' ) {
        $term_ids = wp_list_pluck( $terms, 'id' );

        if ( 'cat' === $taxonomy ) {
            $product->set_category_ids( $term_ids );
        } elseif ( 'tag' === $taxonomy ) {
            $product->set_tag_ids( $term_ids );
        }

        return $product;
    }

    /**
     * Save default attributes.
     *
     * @param WC_Product $product Product instance.
     * @param WP_REST_Request $request Request data.
     *
     * @since 3.0.0
     *
     * @return WC_Product
     */
    protected function save_default_attributes( $product, $request ) {
        if ( isset( $request['default_attributes'] ) && is_array( $request['default_attributes'] ) ) {
            $product_attribute = new ProductAttribute( $request['default_attributes'] );
            $product_attribute->set_default( $product );
        }

        return $product;
    }

    /**
     * Returns all categories.
     *
     * @since 3.6.2
     *
     * @return WP_REST_Response|WP_Error
     */
    public function get_multistep_categories() {
        $categories_controller = new Categories();
        $categories = apply_filters( 'dokan_rest_product_categories', $categories_controller->get() );

        return rest_ensure_response( $categories );
    }

    /**
     * Get the Product's schema, conforming to JSON Schema.
     *
     * @return array
     */

    public function get_item_schema() {
        $weight_unit    = get_option( 'woocommerce_weight_unit' );
        $dimension_unit = get_option( 'woocommerce_dimension_unit' );
        $schema         = [
            '$schema'    => 'http://json-schema.org/draft-04/schema#',
            'title'      => $this->post_type,
            'type'       => 'object',
            'properties' => [
                'id'                    => [
                    'description' => __( 'Unique identifier for the resource.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'name'                  => [
                    'description' => __( 'Product name.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'slug'                  => [
                    'description' => __( 'Product slug.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'permalink'             => [
                    'description' => __( 'Product URL.', 'dokan-lite' ),
                    'type'        => 'string',
                    'format'      => 'uri',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'date_created'          => [
                    'description' => __( "The date the product was created, in the site's timezone.", 'dokan-lite' ),
                    'type'        => 'date-time',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'date_created_gmt'      => [
                    'description' => __( 'The date the product was created, as GMT.', 'dokan-lite' ),
                    'type'        => 'date-time',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'date_modified'         => [
                    'description' => __( "The date the product was last modified, in the site's timezone.", 'dokan-lite' ),
                    'type'        => 'date-time',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'date_modified_gmt'     => [
                    'description' => __( 'The date the product was last modified, as GMT.', 'dokan-lite' ),
                    'type'        => 'date-time',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'type'                  => [
                    'description' => __( 'Product type.', 'dokan-lite' ),
                    'type'        => 'string',
                    'default'     => 'simple',
                    'enum'        => array_keys( wc_get_product_types() ),
                    'context'     => [ 'view', 'edit' ],
                ],
                'status'                => [
                    'description' => __( 'Product status (post status).', 'dokan-lite' ),
                    'type'        => 'string',
                    'default'     => 'publish',
                    'enum'        => array_keys( get_post_statuses() ),
                    'context'     => [ 'view', 'edit' ],
                ],
                'featured'              => [
                    'description' => __( 'Featured product.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'default'     => false,
                    'context'     => [ 'view', 'edit' ],
                ],
                'catalog_visibility'    => [
                    'description' => __( 'Catalog visibility.', 'dokan-lite' ),
                    'type'        => 'string',
                    'default'     => 'visible',
                    'enum'        => [ 'visible', 'catalog', 'search', 'hidden' ],
                    'context'     => [ 'view', 'edit' ],
                ],
                'description'           => [
                    'description' => __( 'Product description.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'short_description'     => [
                    'description' => __( 'Product short description.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'sku'                   => [
                    'description' => __( 'Unique identifier.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'price'                 => [
                    'description' => __( 'Current product price.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'regular_price'         => [
                    'description' => __( 'Product regular price.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'sale_price'            => [
                    'description' => __( 'Product sale price.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'date_on_sale_from'     => [
                    'description' => __( "Start date of sale price, in the site's timezone.", 'dokan-lite' ),
                    'type'        => 'date-time',
                    'context'     => [ 'view', 'edit' ],
                ],
                'date_on_sale_from_gmt' => [
                    'description' => __( 'Start date of sale price, as GMT.', 'dokan-lite' ),
                    'type'        => 'date-time',
                    'context'     => [ 'view', 'edit' ],
                ],
                'date_on_sale_to'       => [
                    'description' => __( "End date of sale price, in the site's timezone.", 'dokan-lite' ),
                    'type'        => 'date-time',
                    'context'     => [ 'view', 'edit' ],
                ],
                'date_on_sale_to_gmt'   => [
                    'description' => __( 'End date of sale price, as GMT.', 'dokan-lite' ),
                    'type'        => 'date-time',
                    'context'     => [ 'view', 'edit' ],
                ],
                'price_html'            => [
                    'description' => __( 'Price formatted in HTML.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'on_sale'               => [
                    'description' => __( 'Shows if the product is on sale.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'purchasable'           => [
                    'description' => __( 'Shows if the product can be bought.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'total_sales'           => [
                    'description' => __( 'Amount of sales.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'virtual'               => [
                    'description' => __( 'If the product is virtual.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'default'     => false,
                    'context'     => [ 'view', 'edit' ],
                ],
                'downloadable'          => [
                    'description' => __( 'If the product is downloadable.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'default'     => false,
                    'context'     => [ 'view', 'edit' ],
                ],
                'downloads'             => [
                    'description' => __( 'List of downloadable files.', 'dokan-lite' ),
                    'type'        => 'array',
                    'context'     => [ 'view', 'edit' ],
                    'items'       => [
                        'type'       => 'object',
                        'properties' => [
                            'id'   => [
                                'description' => __( 'File MD5 hash.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                            'name' => [
                                'description' => __( 'File name.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'file' => [
                                'description' => __( 'File URL.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                            ],
                        ],
                    ],
                ],
                'download_limit'        => [
                    'description' => __( 'Number of times downloadable files can be downloaded after purchase.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'default'     => - 1,
                    'context'     => [ 'view', 'edit' ],
                ],
                'download_expiry'       => [
                    'description' => __( 'Number of days until access to downloadable files expires.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'default'     => - 1,
                    'context'     => [ 'view', 'edit' ],
                ],
                'external_url'          => [
                    'description' => __( 'Product external URL. Only for external products.', 'dokan-lite' ),
                    'type'        => 'string',
                    'format'      => 'uri',
                    'context'     => [ 'view', 'edit' ],
                ],
                'button_text'           => [
                    'description' => __( 'Product external button text. Only for external products.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'tax_status'            => [
                    'description' => __( 'Tax status.', 'dokan-lite' ),
                    'type'        => 'string',
                    'default'     => 'taxable',
                    'enum'        => [ 'taxable', 'shipping', 'none' ],
                    'context'     => [ 'view', 'edit' ],
                ],
                'tax_class'             => [
                    'description' => __( 'Tax class.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'manage_stock'          => [
                    'description' => __( 'Stock management at product level.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'default'     => false,
                    'context'     => [ 'view', 'edit' ],
                ],
                'stock_quantity'        => [
                    'description' => __( 'Stock quantity.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'context'     => [ 'view', 'edit' ],
                ],
                'in_stock'              => [
                    'description' => __( 'Controls whether or not the product is listed as "in stock" or "out of stock" on the frontend.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'default'     => true,
                    'context'     => [ 'view', 'edit' ],
                ],
                'backorders'            => [
                    'description' => __( 'If managing stock, this controls if backorders are allowed.', 'dokan-lite' ),
                    'type'        => 'string',
                    'default'     => 'no',
                    'enum'        => [ 'no', 'notify', 'yes' ],
                    'context'     => [ 'view', 'edit' ],
                ],
                'backorders_allowed'    => [
                    'description' => __( 'Shows if backorders are allowed.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'backordered'           => [
                    'description' => __( 'Shows if the product is on backordered.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'sold_individually'     => [
                    'description' => __( 'Allow one item to be bought in a single order.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'default'     => false,
                    'context'     => [ 'view', 'edit' ],
                ],
                'weight'                => [
                    /* translators: %s: weight unit */
                    'description' => sprintf( __( 'Product weight (%s).', 'dokan-lite' ), $weight_unit ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'dimensions'            => [
                    'description' => __( 'Product dimensions.', 'dokan-lite' ),
                    'type'        => 'object',
                    'context'     => [ 'view', 'edit' ],
                    'properties'  => [
                        'length' => [
                            /* translators: %s: dimension unit */
                            'description' => sprintf( __( 'Product length (%s).', 'dokan-lite' ), $dimension_unit ),
                            'type'        => 'string',
                            'context'     => [ 'view', 'edit' ],
                        ],
                        'width'  => [
                            /* translators: %s: dimension unit */
                            'description' => sprintf( __( 'Product width (%s).', 'dokan-lite' ), $dimension_unit ),
                            'type'        => 'string',
                            'context'     => [ 'view', 'edit' ],
                        ],
                        'height' => [
                            /* translators: %s: dimension unit */
                            'description' => sprintf( __( 'Product height (%s).', 'dokan-lite' ), $dimension_unit ),
                            'type'        => 'string',
                            'context'     => [ 'view', 'edit' ],
                        ],
                    ],
                ],
                'shipping_required'     => [
                    'description' => __( 'Shows if the product need to be shipped.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'shipping_taxable'      => [
                    'description' => __( 'Shows whether or not the product shipping is taxable.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'shipping_class'        => [
                    'description' => __( 'Shipping class slug.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'shipping_class_id'     => [
                    'description' => __( 'Shipping class ID.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'reviews_allowed'       => [
                    'description' => __( 'Allow reviews.', 'dokan-lite' ),
                    'type'        => 'boolean',
                    'default'     => true,
                    'context'     => [ 'view', 'edit' ],
                ],
                'average_rating'        => [
                    'description' => __( 'Reviews average rating.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'rating_count'          => [
                    'description' => __( 'Amount of reviews that the product have.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'related_ids'           => [
                    'description' => __( 'List of related products IDs.', 'dokan-lite' ),
                    'type'        => 'array',
                    'items'       => [
                        'type' => 'integer',
                    ],
                    'context'     => [ 'view', 'edit' ],
                    'readonly'    => true,
                ],
                'upsell_ids'            => [
                    'description' => __( 'List of up-sell products IDs.', 'dokan-lite' ),
                    'type'        => 'array',
                    'items'       => [
                        'type' => 'integer',
                    ],
                    'context'     => [ 'view', 'edit' ],
                ],
                'cross_sell_ids'        => [
                    'description' => __( 'List of cross-sell products IDs.', 'dokan-lite' ),
                    'type'        => 'array',
                    'items'       => [
                        'type' => 'integer',
                    ],
                    'context'     => [ 'view', 'edit' ],
                ],
                'parent_id'             => [
                    'description' => __( 'Product parent ID.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'context'     => [ 'view', 'edit' ],
                ],
                'purchase_note'         => [
                    'description' => __( 'Optional note to send the customer after purchase.', 'dokan-lite' ),
                    'type'        => 'string',
                    'context'     => [ 'view', 'edit' ],
                ],
                'categories'            => [
                    'description' => __( 'List of categories.', 'dokan-lite' ),
                    'type'        => 'array',
                    'context'     => [ 'view', 'edit' ],
                    'items'       => [
                        'type'       => 'object',
                        'properties' => [
                            'id'   => [
                                'description' => __( 'Category ID.', 'dokan-lite' ),
                                'type'        => 'integer',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'name' => [
                                'description' => __( 'Category name.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                            'slug' => [
                                'description' => __( 'Category slug.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                        ],
                    ],
                ],
                'tags'                  => [
                    'description' => __( 'List of tags.', 'dokan-lite' ),
                    'type'        => 'array',
                    'context'     => [ 'view', 'edit' ],
                    'items'       => [
                        'type'       => 'object',
                        'properties' => [
                            'id'   => [
                                'description' => __( 'Tag ID.', 'dokan-lite' ),
                                'type'        => 'integer',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'name' => [
                                'description' => __( 'Tag name.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                            'slug' => [
                                'description' => __( 'Tag slug.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                        ],
                    ],
                ],
                'images'                => [
                    'description' => __( 'List of images.', 'dokan-lite' ),
                    'type'        => 'array',
                    'context'     => [ 'view', 'edit' ],
                    'items'       => [
                        'type'       => 'object',
                        'properties' => [
                            'id'                => [
                                'description' => __( 'Image ID.', 'dokan-lite' ),
                                'type'        => 'integer',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'date_created'      => [
                                'description' => __( "The date the image was created, in the site's timezone.", 'dokan-lite' ),
                                'type'        => 'date-time',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                            'date_created_gmt'  => [
                                'description' => __( 'The date the image was created, as GMT.', 'dokan-lite' ),
                                'type'        => 'date-time',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                            'date_modified'     => [
                                'description' => __( "The date the image was last modified, in the site's timezone.", 'dokan-lite' ),
                                'type'        => 'date-time',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                            'date_modified_gmt' => [
                                'description' => __( 'The date the image was last modified, as GMT.', 'dokan-lite' ),
                                'type'        => 'date-time',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                            'src'               => [
                                'description' => __( 'Image URL.', 'dokan-lite' ),
                                'type'        => 'string',
                                'format'      => 'uri',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'name'              => [
                                'description' => __( 'Image name.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'alt'               => [
                                'description' => __( 'Image alternative text.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'position'          => [
                                'description' => __( 'Image position. 0 means that the image is featured.', 'dokan-lite' ),
                                'type'        => 'integer',
                                'context'     => [ 'view', 'edit' ],
                            ],
                        ],
                    ],
                ],
                'attributes'            => [
                    'description' => __( 'List of attributes.', 'dokan-lite' ),
                    'type'        => 'array',
                    'context'     => [ 'view', 'edit' ],
                    'items'       => [
                        'type'       => 'object',
                        'properties' => [
                            'id'        => [
                                'description' => __( 'Attribute ID.', 'dokan-lite' ),
                                'type'        => 'integer',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'name'      => [
                                'description' => __( 'Attribute name.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'position'  => [
                                'description' => __( 'Attribute position.', 'dokan-lite' ),
                                'type'        => 'integer',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'visible'   => [
                                'description' => __( "Define if the attribute is visible on the \"Additional information\" tab in the product's page.", 'dokan-lite' ),
                                'type'        => 'boolean',
                                'default'     => false,
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'variation' => [
                                'description' => __( 'Define if the attribute can be used as variation.', 'dokan-lite' ),
                                'type'        => 'boolean',
                                'default'     => false,
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'options'   => [
                                'description' => __( 'List of available term names of the attribute.', 'dokan-lite' ),
                                'type'        => 'array',
                                'context'     => [ 'view', 'edit' ],
                                'items'       => [
                                    'type' => 'string',
                                ],
                            ],
                        ],
                    ],
                ],
                'default_attributes'    => [
                    'description' => __( 'Defaults variation attributes.', 'dokan-lite' ),
                    'type'        => 'array',
                    'context'     => [ 'view', 'edit' ],
                    'items'       => [
                        'type'       => 'object',
                        'properties' => [
                            'id'     => [
                                'description' => __( 'Attribute ID.', 'dokan-lite' ),
                                'type'        => 'integer',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'name'   => [
                                'description' => __( 'Attribute name.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'option' => [
                                'description' => __( 'Selected attribute term name.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                            ],
                        ],
                    ],
                ],
                'variations'            => [
                    'description' => __( 'List of variations IDs.', 'dokan-lite' ),
                    'type'        => 'array',
                    'context'     => [ 'view', 'edit' ],
                    'items'       => [
                        'type' => 'integer',
                    ],
                    'readonly'    => true,
                ],
                'grouped_products'      => [
                    'description' => __( 'List of grouped products ID.', 'dokan-lite' ),
                    'type'        => 'array',
                    'items'       => [
                        'type' => 'integer',
                    ],
                    'context'     => [ 'view', 'edit' ],
                ],
                'menu_order'            => [
                    'description' => __( 'Menu order, used to custom sort products.', 'dokan-lite' ),
                    'type'        => 'integer',
                    'context'     => [ 'view', 'edit' ],
                ],
                'meta_data'             => [
                    'description' => __( 'Meta data.', 'dokan-lite' ),
                    'type'        => 'array',
                    'context'     => [ 'view', 'edit' ],
                    'items'       => [
                        'type'       => 'object',
                        'properties' => [
                            'id'    => [
                                'description' => __( 'Meta ID.', 'dokan-lite' ),
                                'type'        => 'integer',
                                'context'     => [ 'view', 'edit' ],
                                'readonly'    => true,
                            ],
                            'key'   => [
                                'description' => __( 'Meta key.', 'dokan-lite' ),
                                'type'        => 'string',
                                'context'     => [ 'view', 'edit' ],
                            ],
                            'value' => [
                                'description' => __( 'Meta value.', 'dokan-lite' ),
                                'type'        => 'mixed',
                                'context'     => [ 'view', 'edit' ],
                            ],
                        ],
                    ],
                ],
            ],
        ];

        return $this->add_additional_fields_schema( $schema );
    }

}