• File: class-wp-rest-menu-items-controller.php
  • Full Path: /home/u505525515/domains/medineeestates.com/public_html/wp-includes/rest-api/endpoints/class-wp-rest-menu-items-controller.php
  • Date Modified: 05/25/2026 6:29 AM
  • File size: 32.49 KB
  • MIME-type: text/x-php
  • Charset: utf-8
<?php
/**
 * REST API: WP_REST_Menu_Items_Controller class
 *
 * @package WordPress
 * @subpackage REST_API
 * @since 5.9.0
 */

/**
 * Core class to access nav items via the REST API.
 *
 * @since 5.9.0
 *
 * @see WP_REST_Posts_Controller
 */
class WP_REST_Menu_Items_Controller extends WP_REST_Posts_Controller {

    /**
     * Gets the nav menu item, if the ID is valid.
     *
     * @since 5.9.0
     *
     * @param int $id Supplied ID.
     * @return object|WP_Error Post object if ID is valid, WP_Error otherwise.
     */
    protected function get_nav_menu_item( $id ) {
        $post = $this->get_post( $id );
        if ( is_wp_error( $post ) ) {
            return $post;
        }

        return wp_setup_nav_menu_item( $post );
    }

    /**
     * Checks if a given request has access to read menu items.
     *
     * @since 5.9.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
     */
    public function get_items_permissions_check( $request ) {
        $has_permission = parent::get_items_permissions_check( $request );

        if ( true !== $has_permission ) {
            return $has_permission;
        }

        return $this->check_has_read_only_access( $request );
    }

    /**
     * Checks if a given request has access to read a menu item if they have access to edit them.
     *
     * @since 5.9.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return bool|WP_Error True if the request has read access for the item, WP_Error object or false otherwise.
     */
    public function get_item_permissions_check( $request ) {
        $permission_check = parent::get_item_permissions_check( $request );

        if ( true !== $permission_check ) {
            return $permission_check;
        }

        return $this->check_has_read_only_access( $request );
    }

    /**
     * Checks whether the current user has read permission for the endpoint.
     *
     * This allows for any user that can `edit_theme_options` or edit any REST API available post type.
     *
     * @since 5.9.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return true|WP_Error True if the request has read access for the item, WP_Error object otherwise.
     */
    protected function check_has_read_only_access( $request ) {
        /**
         * Filters whether the current user has read access to menu items via the REST API.
         *
         * @since 6.8.0
         *
         * @param bool               $read_only_access Whether the current user has read access to menu items
         *                                             via the REST API.
         * @param WP_REST_Request    $request          Full details about the request.
         * @param WP_REST_Controller $controller       The current instance of the controller.
         */
        $read_only_access = apply_filters( 'rest_menu_read_access', false, $request, $this );
        if ( $read_only_access ) {
            return true;
        }

        if ( current_user_can( 'edit_theme_options' ) ) {
            return true;
        }

        if ( current_user_can( 'edit_posts' ) ) {
            return true;
        }

        foreach ( get_post_types( array( 'show_in_rest' => true ), 'objects' ) as $post_type ) {
            if ( current_user_can( $post_type->cap->edit_posts ) ) {
                return true;
            }
        }

        return new WP_Error(
            'rest_cannot_view',
            __( 'Sorry, you are not allowed to view menu items.' ),
            array( 'status' => rest_authorization_required_code() )
        );
    }

    /**
     * Creates a single nav menu item.
     *
     * @since 5.9.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
     */
    public function create_item( $request ) {
        if ( ! empty( $request['id'] ) ) {
            return new WP_Error( 'rest_post_exists', __( 'Cannot create existing post.' ), array( 'status' => 400 ) );
        }

        $prepared_nav_item = $this->prepare_item_for_database( $request );

        if ( is_wp_error( $prepared_nav_item ) ) {
            return $prepared_nav_item;
        }
        $prepared_nav_item = (array) $prepared_nav_item;

        $nav_menu_item_id = wp_update_nav_menu_item( $prepared_nav_item['menu-id'], $prepared_nav_item['menu-item-db-id'], wp_slash( $prepared_nav_item ), false );
        if ( is_wp_error( $nav_menu_item_id ) ) {
            if ( 'db_insert_error' === $nav_menu_item_id->get_error_code() ) {
                $nav_menu_item_id->add_data( array( 'status' => 500 ) );
            } else {
                $nav_menu_item_id->add_data( array( 'status' => 400 ) );
            }

            return $nav_menu_item_id;
        }

        $nav_menu_item = $this->get_nav_menu_item( $nav_menu_item_id );
        if ( is_wp_error( $nav_menu_item ) ) {
            $nav_menu_item->add_data( array( 'status' => 404 ) );

            return $nav_menu_item;
        }

        /**
         * Fires after a single menu item is created or updated via the REST API.
         *
         * @since 5.9.0
         *
         * @param object          $nav_menu_item Inserted or updated menu item object.
         * @param WP_REST_Request $request       Request object.
         * @param bool            $creating      True when creating a menu item, false when updating.
         */
        do_action( 'rest_insert_nav_menu_item', $nav_menu_item, $request, true );

        $schema = $this->get_item_schema();

        if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
            $meta_update = $this->meta->update_value( $request['meta'], $nav_menu_item_id );

            if ( is_wp_error( $meta_update ) ) {
                return $meta_update;
            }
        }

        $nav_menu_item = $this->get_nav_menu_item( $nav_menu_item_id );
        $fields_update = $this->update_additional_fields_for_object( $nav_menu_item, $request );

        if ( is_wp_error( $fields_update ) ) {
            return $fields_update;
        }

        $request->set_param( 'context', 'edit' );

        /**
         * Fires after a single menu item is completely created or updated via the REST API.
         *
         * @since 5.9.0
         *
         * @param object          $nav_menu_item Inserted or updated menu item object.
         * @param WP_REST_Request $request       Request object.
         * @param bool            $creating      True when creating a menu item, false when updating.
         */
        do_action( 'rest_after_insert_nav_menu_item', $nav_menu_item, $request, true );

        $post = get_post( $nav_menu_item_id );
        wp_after_insert_post( $post, false, null );

        $response = $this->prepare_item_for_response( $post, $request );
        $response = rest_ensure_response( $response );

        $response->set_status( 201 );
        $response->header( 'Location', rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->rest_base, $nav_menu_item_id ) ) );

        return $response;
    }

    /**
     * Updates a single nav menu item.
     *
     * @since 5.9.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
     */
    public function update_item( $request ) {
        $valid_check = $this->get_nav_menu_item( $request['id'] );
        if ( is_wp_error( $valid_check ) ) {
            return $valid_check;
        }
        $post_before       = get_post( $request['id'] );
        $prepared_nav_item = $this->prepare_item_for_database( $request );

        if ( is_wp_error( $prepared_nav_item ) ) {
            return $prepared_nav_item;
        }

        $prepared_nav_item = (array) $prepared_nav_item;

        $nav_menu_item_id = wp_update_nav_menu_item( $prepared_nav_item['menu-id'], $prepared_nav_item['menu-item-db-id'], wp_slash( $prepared_nav_item ), false );

        if ( is_wp_error( $nav_menu_item_id ) ) {
            if ( 'db_update_error' === $nav_menu_item_id->get_error_code() ) {
                $nav_menu_item_id->add_data( array( 'status' => 500 ) );
            } else {
                $nav_menu_item_id->add_data( array( 'status' => 400 ) );
            }

            return $nav_menu_item_id;
        }

        $nav_menu_item = $this->get_nav_menu_item( $nav_menu_item_id );
        if ( is_wp_error( $nav_menu_item ) ) {
            $nav_menu_item->add_data( array( 'status' => 404 ) );

            return $nav_menu_item;
        }

        /** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-menu-items-controller.php */
        do_action( 'rest_insert_nav_menu_item', $nav_menu_item, $request, false );

        $schema = $this->get_item_schema();

        if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
            $meta_update = $this->meta->update_value( $request['meta'], $nav_menu_item->ID );

            if ( is_wp_error( $meta_update ) ) {
                return $meta_update;
            }
        }

        $post          = get_post( $nav_menu_item_id );
        $nav_menu_item = $this->get_nav_menu_item( $nav_menu_item_id );
        $fields_update = $this->update_additional_fields_for_object( $nav_menu_item, $request );

        if ( is_wp_error( $fields_update ) ) {
            return $fields_update;
        }

        $request->set_param( 'context', 'edit' );

        /** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-menu-items-controller.php */
        do_action( 'rest_after_insert_nav_menu_item', $nav_menu_item, $request, false );

        wp_after_insert_post( $post, true, $post_before );

        $response = $this->prepare_item_for_response( get_post( $nav_menu_item_id ), $request );

        return rest_ensure_response( $response );
    }

    /**
     * Deletes a single nav menu item.
     *
     * @since 5.9.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return WP_REST_Response|WP_Error True on success, or WP_Error object on failure.
     */
    public function delete_item( $request ) {
        $menu_item = $this->get_nav_menu_item( $request['id'] );
        if ( is_wp_error( $menu_item ) ) {
            return $menu_item;
        }

        // We don't support trashing for menu items.
        if ( ! $request['force'] ) {
            /* translators: %s: force=true */
            return new WP_Error( 'rest_trash_not_supported', sprintf( __( "Menu items do not support trashing. Set '%s' to delete." ), 'force=true' ), array( 'status' => 501 ) );
        }

        $previous = $this->prepare_item_for_response( get_post( $request['id'] ), $request );

        $result = wp_delete_post( $request['id'], true );

        if ( ! $result ) {
            return new WP_Error( 'rest_cannot_delete', __( 'The post cannot be deleted.' ), array( 'status' => 500 ) );
        }

        $response = new WP_REST_Response();
        $response->set_data(
            array(
                'deleted'  => true,
                'previous' => $previous->get_data(),
            )
        );

        /**
         * Fires immediately after a single menu item is deleted via the REST API.
         *
         * @since 5.9.0
         *
         * @param object          $nav_menu_item Inserted or updated menu item object.
         * @param WP_REST_Response $response The response data.
         * @param WP_REST_Request $request       Request object.
         */
        do_action( 'rest_delete_nav_menu_item', $menu_item, $response, $request );

        return $response;
    }

    /**
     * Prepares a single nav menu item for create or update.
     *
     * @since 5.9.0
     *
     * @param WP_REST_Request $request Request object.
     *
     * @return object|WP_Error
     */
    protected function prepare_item_for_database( $request ) {
        $menu_item_db_id = $request['id'];
        $menu_item_obj   = $this->get_nav_menu_item( $menu_item_db_id );
        // Need to persist the menu item data. See https://core.trac.wordpress.org/ticket/28138
        if ( ! is_wp_error( $menu_item_obj ) ) {
            // Correct the menu position if this was the first item. See https://core.trac.wordpress.org/ticket/28140
            $position = ( 0 === $menu_item_obj->menu_order ) ? 1 : $menu_item_obj->menu_order;

            $prepared_nav_item = array(
                'menu-item-db-id'       => $menu_item_db_id,
                'menu-item-object-id'   => $menu_item_obj->object_id,
                'menu-item-object'      => $menu_item_obj->object,
                'menu-item-parent-id'   => $menu_item_obj->menu_item_parent,
                'menu-item-position'    => $position,
                'menu-item-type'        => $menu_item_obj->type,
                'menu-item-title'       => $menu_item_obj->title,
                'menu-item-url'         => $menu_item_obj->url,
                'menu-item-description' => $menu_item_obj->description,
                'menu-item-attr-title'  => $menu_item_obj->attr_title,
                'menu-item-target'      => $menu_item_obj->target,
                'menu-item-classes'     => $menu_item_obj->classes,
                // Stored in the database as a string.
                'menu-item-xfn'         => explode( ' ', $menu_item_obj->xfn ),
                'menu-item-status'      => $menu_item_obj->post_status,
                'menu-id'               => $this->get_menu_id( $menu_item_db_id ),
            );
        } else {
            $prepared_nav_item = array(
                'menu-id'               => 0,
                'menu-item-db-id'       => 0,
                'menu-item-object-id'   => 0,
                'menu-item-object'      => '',
                'menu-item-parent-id'   => 0,
                'menu-item-position'    => 1,
                'menu-item-type'        => 'custom',
                'menu-item-title'       => '',
                'menu-item-url'         => '',
                'menu-item-description' => '',
                'menu-item-attr-title'  => '',
                'menu-item-target'      => '',
                'menu-item-classes'     => array(),
                'menu-item-xfn'         => array(),
                'menu-item-status'      => 'publish',
            );
        }

        $mapping = array(
            'menu-item-db-id'       => 'id',
            'menu-item-object-id'   => 'object_id',
            'menu-item-object'      => 'object',
            'menu-item-parent-id'   => 'parent',
            'menu-item-position'    => 'menu_order',
            'menu-item-type'        => 'type',
            'menu-item-url'         => 'url',
            'menu-item-description' => 'description',
            'menu-item-attr-title'  => 'attr_title',
            'menu-item-target'      => 'target',
            'menu-item-classes'     => 'classes',
            'menu-item-xfn'         => 'xfn',
            'menu-item-status'      => 'status',
        );

        $schema = $this->get_item_schema();

        foreach ( $mapping as $original => $api_request ) {
            if ( isset( $request[ $api_request ] ) ) {
                $prepared_nav_item[ $original ] = $request[ $api_request ];
            }
        }

        $taxonomy = get_taxonomy( 'nav_menu' );
        $base     = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
        // If menus submitted, cast to int.
        if ( ! empty( $request[ $base ] ) ) {
            $prepared_nav_item['menu-id'] = absint( $request[ $base ] );
        }

        // Nav menu title.
        if ( ! empty( $schema['properties']['title'] ) && isset( $request['title'] ) ) {
            if ( is_string( $request['title'] ) ) {
                $prepared_nav_item['menu-item-title'] = $request['title'];
            } elseif ( ! empty( $request['title']['raw'] ) ) {
                $prepared_nav_item['menu-item-title'] = $request['title']['raw'];
            }
        }

        $error = new WP_Error();

        // Check if object id exists before saving.
        if ( ! $prepared_nav_item['menu-item-object'] ) {
            // If taxonomy, check if term exists.
            if ( 'taxonomy' === $prepared_nav_item['menu-item-type'] ) {
                $original = get_term( absint( $prepared_nav_item['menu-item-object-id'] ) );
                if ( empty( $original ) || is_wp_error( $original ) ) {
                    $error->add( 'rest_term_invalid_id', __( 'Invalid term ID.' ), array( 'status' => 400 ) );
                } else {
                    $prepared_nav_item['menu-item-object'] = get_term_field( 'taxonomy', $original );
                }
                // If post, check if post object exists.
            } elseif ( 'post_type' === $prepared_nav_item['menu-item-type'] ) {
                $original = get_post( absint( $prepared_nav_item['menu-item-object-id'] ) );
                if ( empty( $original ) ) {
                    $error->add( 'rest_post_invalid_id', __( 'Invalid post ID.' ), array( 'status' => 400 ) );
                } else {
                    $prepared_nav_item['menu-item-object'] = get_post_type( $original );
                }
            }
        }

        // If post type archive, check if post type exists.
        if ( 'post_type_archive' === $prepared_nav_item['menu-item-type'] ) {
            $post_type = $prepared_nav_item['menu-item-object'] ? $prepared_nav_item['menu-item-object'] : false;
            $original  = get_post_type_object( $post_type );
            if ( ! $original ) {
                $error->add( 'rest_post_invalid_type', __( 'Invalid post type.' ), array( 'status' => 400 ) );
            }
        }

        // Check if menu item is type custom, then title and url are required.
        if ( 'custom' === $prepared_nav_item['menu-item-type'] ) {
            if ( '' === $prepared_nav_item['menu-item-title'] ) {
                $error->add( 'rest_title_required', __( 'The title is required when using a custom menu item type.' ), array( 'status' => 400 ) );
            }
            if ( empty( $prepared_nav_item['menu-item-url'] ) ) {
                $error->add( 'rest_url_required', __( 'The url is required when using a custom menu item type.' ), array( 'status' => 400 ) );
            }
        }

        if ( $error->has_errors() ) {
            return $error;
        }

        // The xfn and classes properties are arrays, but passed to wp_update_nav_menu_item as a string.
        foreach ( array( 'menu-item-xfn', 'menu-item-classes' ) as $key ) {
            $prepared_nav_item[ $key ] = implode( ' ', $prepared_nav_item[ $key ] );
        }

        // Only draft / publish are valid post status for menu items.
        if ( 'publish' !== $prepared_nav_item['menu-item-status'] ) {
            $prepared_nav_item['menu-item-status'] = 'draft';
        }

        $prepared_nav_item = (object) $prepared_nav_item;

        /**
         * Filters a menu item before it is inserted via the REST API.
         *
         * @since 5.9.0
         *
         * @param object          $prepared_nav_item An object representing a single menu item prepared
         *                                           for inserting or updating the database.
         * @param WP_REST_Request $request           Request object.
         */
        return apply_filters( 'rest_pre_insert_nav_menu_item', $prepared_nav_item, $request );
    }

    /**
     * Prepares a single nav menu item output for response.
     *
     * @since 5.9.0
     *
     * @param WP_Post         $item    Post object.
     * @param WP_REST_Request $request Request object.
     * @return WP_REST_Response Response object.
     */
    public function prepare_item_for_response( $item, $request ) {
        // Base fields for every post.
        $fields    = $this->get_fields_for_response( $request );
        $menu_item = $this->get_nav_menu_item( $item->ID );
        $data      = array();

        if ( rest_is_field_included( 'id', $fields ) ) {
            $data['id'] = $menu_item->ID;
        }

        if ( rest_is_field_included( 'title', $fields ) ) {
            $data['title'] = array();
        }

        if ( rest_is_field_included( 'title.raw', $fields ) ) {
            $data['title']['raw'] = $menu_item->title;
        }

        if ( rest_is_field_included( 'title.rendered', $fields ) ) {
            add_filter( 'protected_title_format', array( $this, 'protected_title_format' ) );
            add_filter( 'private_title_format', array( $this, 'protected_title_format' ) );

            /** This filter is documented in wp-includes/post-template.php */
            $title = apply_filters( 'the_title', $menu_item->title, $menu_item->ID );

            $data['title']['rendered'] = $title;

            remove_filter( 'protected_title_format', array( $this, 'protected_title_format' ) );
            remove_filter( 'private_title_format', array( $this, 'protected_title_format' ) );
        }

        if ( rest_is_field_included( 'status', $fields ) ) {
            $data['status'] = $menu_item->post_status;
        }

        if ( rest_is_field_included( 'url', $fields ) ) {
            $data['url'] = $menu_item->url;
        }

        if ( rest_is_field_included( 'attr_title', $fields ) ) {
            // Same as post_excerpt.
            $data['attr_title'] = $menu_item->attr_title;
        }

        if ( rest_is_field_included( 'description', $fields ) ) {
            // Same as post_content.
            $data['description'] = $menu_item->description;
        }

        if ( rest_is_field_included( 'type', $fields ) ) {
            $data['type'] = $menu_item->type;
        }

        if ( rest_is_field_included( 'type_label', $fields ) ) {
            $data['type_label'] = $menu_item->type_label;
        }

        if ( rest_is_field_included( 'object', $fields ) ) {
            $data['object'] = $menu_item->object;
        }

        if ( rest_is_field_included( 'object_id', $fields ) ) {
            // It is stored as a string, but should be exposed as an integer.
            $data['object_id'] = absint( $menu_item->object_id );
        }

        if ( rest_is_field_included( 'parent', $fields ) ) {
            // Same as post_parent, exposed as an integer.
            $data['parent'] = (int) $menu_item->menu_item_parent;
        }

        if ( rest_is_field_included( 'menu_order', $fields ) ) {
            // Same as post_parent, exposed as an integer.
            $data['menu_order'] = (int) $menu_item->menu_order;
        }

        if ( rest_is_field_included( 'target', $fields ) ) {
            $data['target'] = $menu_item->target;
        }

        if ( rest_is_field_included( 'classes', $fields ) ) {
            $data['classes'] = (array) $menu_item->classes;
        }

        if ( rest_is_field_included( 'xfn', $fields ) ) {
            $data['xfn'] = array_map( 'sanitize_html_class', explode( ' ', $menu_item->xfn ) );
        }

        if ( rest_is_field_included( 'invalid', $fields ) ) {
            $data['invalid'] = (bool) $menu_item->_invalid;
        }

        if ( rest_is_field_included( 'meta', $fields ) ) {
            $data['meta'] = $this->meta->get_value( $menu_item->ID, $request );
        }

        $taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

        foreach ( $taxonomies as $taxonomy ) {
            $base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;

            if ( rest_is_field_included( $base, $fields ) ) {
                $terms = get_the_terms( $item, $taxonomy->name );
                if ( ! is_array( $terms ) ) {
                    continue;
                }
                $term_ids = $terms ? array_values( wp_list_pluck( $terms, 'term_id' ) ) : array();
                if ( 'nav_menu' === $taxonomy->name ) {
                    $data[ $base ] = $term_ids ? array_shift( $term_ids ) : 0;
                } else {
                    $data[ $base ] = $term_ids;
                }
            }
        }

        $context = ! empty( $request['context'] ) ? $request['context'] : 'view';
        $data    = $this->add_additional_fields_to_object( $data, $request );
        $data    = $this->filter_response_by_context( $data, $context );

        // Wrap the data in a response object.
        $response = rest_ensure_response( $data );

        if ( rest_is_field_included( '_links', $fields ) || rest_is_field_included( '_embedded', $fields ) ) {
            $links = $this->prepare_links( $item );
            $response->add_links( $links );

            if ( ! empty( $links['self']['href'] ) ) {
                $actions = $this->get_available_actions( $item, $request );

                $self = $links['self']['href'];

                foreach ( $actions as $rel ) {
                    $response->add_link( $rel, $self );
                }
            }
        }

        /**
         * Filters the menu item data for a REST API response.
         *
         * @since 5.9.0
         *
         * @param WP_REST_Response $response  The response object.
         * @param object           $menu_item Menu item setup by {@see wp_setup_nav_menu_item()}.
         * @param WP_REST_Request  $request   Request object.
         */
        return apply_filters( 'rest_prepare_nav_menu_item', $response, $menu_item, $request );
    }

    /**
     * Prepares links for the request.
     *
     * @since 5.9.0
     *
     * @param WP_Post $post Post object.
     * @return array Links for the given post.
     */
    protected function prepare_links( $post ) {
        $links     = parent::prepare_links( $post );
        $menu_item = $this->get_nav_menu_item( $post->ID );

        if ( empty( $menu_item->object_id ) ) {
            return $links;
        }

        $path = '';
        $type = '';
        $key  = $menu_item->type;
        if ( 'post_type' === $menu_item->type ) {
            $path = rest_get_route_for_post( $menu_item->object_id );
            $type = get_post_type( $menu_item->object_id );
        } elseif ( 'taxonomy' === $menu_item->type ) {
            $path = rest_get_route_for_term( $menu_item->object_id );
            $type = get_term_field( 'taxonomy', $menu_item->object_id );
        }

        if ( $path && $type ) {
            $links['https://api.w.org/menu-item-object'][] = array(
                'href'       => rest_url( $path ),
                $key         => $type,
                'embeddable' => true,
            );
        }

        return $links;
    }

    /**
     * Retrieves Link Description Objects that should be added to the Schema for the nav menu items collection.
     *
     * @since 5.9.0
     *
     * @return array
     */
    protected function get_schema_links() {
        $links   = parent::get_schema_links();
        $href    = rest_url( "{$this->namespace}/{$this->rest_base}/{id}" );
        $links[] = array(
            'rel'          => 'https://api.w.org/menu-item-object',
            'title'        => __( 'Get linked object.' ),
            'href'         => $href,
            'targetSchema' => array(
                'type'       => 'object',
                'properties' => array(
                    'object' => array(
                        'type' => 'integer',
                    ),
                ),
            ),
        );

        return $links;
    }

    /**
     * Retrieves the nav menu item's schema, conforming to JSON Schema.
     *
     * @since 5.9.0
     *
     * @return array Item schema data.
     */
    public function get_item_schema() {
        if ( $this->schema ) {
            return $this->add_additional_fields_schema( $this->schema );
        }

        $schema = array(
            '$schema' => 'http://json-schema.org/draft-04/schema#',
            'title'   => $this->post_type,
            'type'    => 'object',
        );

        $schema['properties']['title'] = array(
            'description' => __( 'The title for the object.' ),
            'type'        => array( 'string', 'object' ),
            'context'     => array( 'view', 'edit', 'embed' ),
            'properties'  => array(
                'raw'      => array(
                    'description' => __( 'Title for the object, as it exists in the database.' ),
                    'type'        => 'string',
                    'context'     => array( 'edit' ),
                ),
                'rendered' => array(
                    'description' => __( 'HTML title for the object, transformed for display.' ),
                    'type'        => 'string',
                    'context'     => array( 'view', 'edit', 'embed' ),
                    'readonly'    => true,
                ),
            ),
        );

        $schema['properties']['id'] = array(
            'description' => __( 'Unique identifier for the object.' ),
            'type'        => 'integer',
            'default'     => 0,
            'minimum'     => 0,
            'context'     => array( 'view', 'edit', 'embed' ),
            'readonly'    => true,
        );

        $schema['properties']['type_label'] = array(
            'description' => __( 'The singular label used to describe this type of menu item.' ),
            'type'        => 'string',
            'context'     => array( 'view', 'edit', 'embed' ),
            'readonly'    => true,
        );

        $schema['properties']['type'] = array(
            'description' => __( 'The family of objects originally represented, such as "post_type" or "taxonomy".' ),
            'type'        => 'string',
            'enum'        => array( 'taxonomy', 'post_type', 'post_type_archive', 'custom' ),
            'context'     => array( 'view', 'edit', 'embed' ),
            'default'     => 'custom',
        );

        $schema['properties']['status'] = array(
            'description' => __( 'A named status for the object.' ),
            'type'        => 'string',
            'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
            'default'     => 'publish',
            'context'     => array( 'view', 'edit', 'embed' ),
        );

        $schema['properties']['parent'] = array(
            'description' => __( 'The ID for the parent of the object.' ),
            'type'        => 'integer',
            'minimum'     => 0,
            'default'     => 0,
            'context'     => array( 'view', 'edit', 'embed' ),
        );

        $schema['properties']['attr_title'] = array(
            'description' => __( 'Text for the title attribute of the link element for this menu item.' ),
            'type'        => 'string',
            'context'     => array( 'view', 'edit', 'embed' ),
            'arg_options' => array(
                'sanitize_callback' => 'sanitize_text_field',
            ),
        );

        $schema['properties']['classes'] = array(
            'description' => __( 'Class names for the link element of this menu item.' ),
            'type'        => 'array',
            'items'       => array(
                'type' => 'string',
            ),
            'context'     => array( 'view', 'edit', 'embed' ),
            'arg_options' => array(
                'sanitize_callback' => static function ( $value ) {
                    return array_map( 'sanitize_html_class', wp_parse_list( $value ) );
                },
            ),
        );

        $schema['properties']['description'] = array(
            'description' => __( 'The description of this menu item.' ),
            'type'        => 'string',
            'context'     => array( 'view', 'edit', 'embed' ),
            'arg_options' => array(
                'sanitize_callback' => 'sanitize_text_field',
            ),
        );

        $schema['properties']['menu_order'] = array(
            'description' => __( 'The DB ID of the nav_menu_item that is this item\'s menu parent, if any, otherwise 0.' ),
            'context'     => array( 'view', 'edit', 'embed' ),
            'type'        => 'integer',
            'minimum'     => 1,
            'default'     => 1,
        );

        $schema['properties']['object'] = array(
            'description' => __( 'The type of object originally represented, such as "category", "post", or "attachment".' ),
            'context'     => array( 'view', 'edit', 'embed' ),
            'type'        => 'string',
            'arg_options' => array(
                'sanitize_callback' => 'sanitize_key',
            ),
        );

        $schema['properties']['object_id'] = array(
            'description' => __( 'The database ID of the original object this menu item represents, for example the ID for posts or the term_id for categories.' ),
            'context'     => array( 'view', 'edit', 'embed' ),
            'type'        => 'integer',
            'minimum'     => 0,
            'default'     => 0,
        );

        $schema['properties']['target'] = array(
            'description' => __( 'The target attribute of the link element for this menu item.' ),
            'type'        => 'string',
            'context'     => array( 'view', 'edit', 'embed' ),
            'enum'        => array(
                '_blank',
                '',
            ),
        );

        $schema['properties']['url'] = array(
            'description' => __( 'The URL to which this menu item points.' ),
            'type'        => 'string',
            'format'      => 'uri',
            'context'     => array( 'view', 'edit', 'embed' ),
            'arg_options' => array(
                'validate_callback' => static function ( $url ) {
                    if ( '' === $url ) {
                        return true;
                    }

                    if ( sanitize_url( $url ) ) {
                        return true;
                    }

                    return new WP_Error(
                        'rest_invalid_url',
                        __( 'Invalid URL.' )
                    );
                },
            ),
        );

        $schema['properties']['xfn'] = array(
            'description' => __( 'The XFN relationship expressed in the link of this menu item.' ),
            'type'        => 'array',
            'items'       => array(
                'type' => 'string',
            ),
            'context'     => array( 'view', 'edit', 'embed' ),
            'arg_options' => array(
                'sanitize_callback' => static function ( $value ) {
                    return array_map( 'sanitize_html_class', wp_parse_list( $value ) );
                },
            ),
        );

        $schema['properties']['invalid'] = array(
            'description' => __( 'Whether the menu item represents an object that no longer exists.' ),
            'context'     => array( 'view', 'edit', 'embed' ),
            'type'        => 'boolean',
            'readonly'    => true,
        );

        $taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

        foreach ( $taxonomies as $taxonomy ) {
            $base                          = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
            $schema['properties'][ $base ] = array(
                /* translators: %s: taxonomy name */
                'description' => sprintf( __( 'The terms assigned to the object in the %s taxonomy.' ), $taxonomy->name ),
                'type'        => 'array',
                'items'       => array(
                    'type' => 'integer',
                ),
                'context'     => array( 'view', 'edit' ),
            );

            if ( 'nav_menu' === $taxonomy->name ) {
                $schema['properties'][ $base ]['type'] = 'integer';
                unset( $schema['properties'][ $base ]['items'] );
            }
        }

        $schema['properties']['meta'] = $this->meta->get_field_schema();

        $schema_links = $this->get_schema_links();

        if ( $schema_links ) {
            $schema['links'] = $schema_links;
        }

        $this->schema = $schema;

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

    /**
     * Retrieves the query params for the nav menu items collection.
     *
     * @since 5.9.0
     *
     * @return array Collection parameters.
     */
    public function get_collection_params() {
        $query_params = parent::get_collection_params();

        $query_params['menu_order'] = array(
            'description' => __( 'Limit result set to posts with a specific menu_order value.' ),
            'type'        => 'integer',
        );

        $query_params['order'] = array(
            'description' => __( 'Order sort attribute ascending or descending.' ),
            'type'        => 'string',
            'default'     => 'asc',
            'enum'        => array( 'asc', 'desc' ),
        );

        $query_params['orderby'] = array(
            'description' => __( 'Sort collection by object attribute.' ),
            'type'        => 'string',
            'default'     => 'menu_order',
            'enum'        => array(
                'author',
                'date',
                'id',
                'include',
                'modified',
                'parent',
                'relevance',
                'slug',
                'include_slugs',
                'title',
                'menu_order',
            ),
        );
        // Change default to 100 items.
        $query_params['per_page']['default'] = 100;

        return $query_params;
    }

    /**
     * Determines the allowed query_vars for a get_items() response and prepares
     * them for WP_Query.
     *
     * @since 5.9.0
     *
     * @param array           $prepared_args Optional. Prepared WP_Query arguments. Default empty array.
     * @param WP_REST_Request $request       Optional. Full details about the request.
     * @return array Items query arguments.
     */
    protected function prepare_items_query( $prepared_args = array(), $request = null ) {
        $query_args = parent::prepare_items_query( $prepared_args, $request );

        // Map to proper WP_Query orderby param.
        if ( isset( $query_args['orderby'], $request['orderby'] ) ) {
            $orderby_mappings = array(
                'id'            => 'ID',
                'include'       => 'post__in',
                'slug'          => 'post_name',
                'include_slugs' => 'post_name__in',
                'menu_order'    => 'menu_order',
            );

            if ( isset( $orderby_mappings[ $request['orderby'] ] ) ) {
                $query_args['orderby'] = $orderby_mappings[ $request['orderby'] ];
            }
        }

        $query_args['update_menu_item_cache'] = true;

        return $query_args;
    }

    /**
     * Gets the id of the menu that the given menu item belongs to.
     *
     * @since 5.9.0
     *
     * @param int $menu_item_id Menu item id.
     * @return int
     */
    protected function get_menu_id( $menu_item_id ) {
        $menu_ids = wp_get_post_terms( $menu_item_id, 'nav_menu', array( 'fields' => 'ids' ) );
        $menu_id  = 0;
        if ( $menu_ids && ! is_wp_error( $menu_ids ) ) {
            $menu_id = array_shift( $menu_ids );
        }

        return $menu_id;
    }
}