HTML Examples/WP.iso/wordpress2/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php

PHP Script | 2017-10-23 | 72.2 KB | 2,299 lines

<?php
/**
 * REST API: WP_REST_Posts_Controller class
 *
 * @package WordPress
 * @subpackage REST_API
 * @since 4.7.0
 */

/**
 * Core class to access posts via the REST API.
 *
 * @since 4.7.0
 *
 * @see WP_REST_Controller
 */
class WP_REST_Posts_Controller extends WP_REST_Controller {

    /**
     * Post type.
     *
     * @since 4.7.0
     * @var string
     */
    protected $post_type;

    /**
     * Instance of a post meta fields object.
     *
     * @since 4.7.0
     * @var WP_REST_Post_Meta_Fields
     */
    protected $meta;

    /**
     * Constructor.
     *
     * @since 4.7.0
     *
     * @param string $post_type Post type.
     */
    public function __construct( $post_type ) {
        $this->post_type = $post_type;
        $this->namespace = 'wp/v2';
        $obj = get_post_type_object( $post_type );
        $this->rest_base = ! empty( $obj->rest_base ) ? $obj->rest_base : $obj->name;

        $this->meta = new WP_REST_Post_Meta_Fields( $this->post_type );
    }

    /**
     * Registers the routes for the objects of the controller.
     *
     * @since 4.7.0
     *
     * @see register_rest_route()
     */
    public function register_routes() {

        register_rest_route( $this->namespace, '/' . $this->rest_base, array(
            array(
                'methods'             => WP_REST_Server::READABLE,
                'callback'            => array( $this, 'get_items' ),
                'permission_callback' => array( $this, 'get_items_permissions_check' ),
                'args'                => $this->get_collection_params(),
            ),
            array(
                'methods'             => WP_REST_Server::CREATABLE,
                'callback'            => array( $this, 'create_item' ),
                'permission_callback' => array( $this, 'create_item_permissions_check' ),
                'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
            ),
            'schema' => array( $this, 'get_public_item_schema' ),
        ) );

        $schema = $this->get_item_schema();
        $get_item_args = array(
            'context'  => $this->get_context_param( array( 'default' => 'view' ) ),
        );
        if ( isset( $schema['properties']['password'] ) ) {
            $get_item_args['password'] = array(
                'description' => __( 'The password for the post if it is password protected.' ),
                'type'        => 'string',
            );
        }
        register_rest_route( $this->namespace, '/' . $this->rest_base . '/(?P<id>[\d]+)', array(
            'args' => array(
                'id' => array(
                    'description' => __( 'Unique identifier for the object.' ),
                    'type'        => 'integer',
                ),
            ),
            array(
                'methods'             => WP_REST_Server::READABLE,
                'callback'            => array( $this, 'get_item' ),
                'permission_callback' => array( $this, 'get_item_permissions_check' ),
                'args'                => $get_item_args,
            ),
            array(
                'methods'             => WP_REST_Server::EDITABLE,
                'callback'            => array( $this, 'update_item' ),
                'permission_callback' => array( $this, 'update_item_permissions_check' ),
                'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
            ),
            array(
                'methods'             => WP_REST_Server::DELETABLE,
                'callback'            => array( $this, 'delete_item' ),
                'permission_callback' => array( $this, 'delete_item_permissions_check' ),
                'args'                => array(
                    'force' => array(
                        'type'        => 'boolean',
                        'default'     => false,
                        'description' => __( 'Whether to bypass trash and force deletion.' ),
                    ),
                ),
            ),
            'schema' => array( $this, 'get_public_item_schema' ),
        ) );
    }

    /**
     * Checks if a given request has access to read posts.
     *
     * @since 4.7.0
     *
     * @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 ) {

        $post_type = get_post_type_object( $this->post_type );

        if ( 'edit' === $request['context'] && ! current_user_can( $post_type->cap->edit_posts ) ) {
            return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to edit posts in this post type.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        return true;
    }

    /**
     * Retrieves a collection of posts.
     *
     * @since 4.7.0
     *
     * @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 get_items( $request ) {

        // Ensure a search string is set in case the orderby is set to 'relevance'.
        if ( ! empty( $request['orderby'] ) && 'relevance' === $request['orderby'] && empty( $request['search'] ) ) {
            return new WP_Error( 'rest_no_search_term_defined', __( 'You need to define a search term to order by relevance.' ), array( 'status' => 400 ) );
        }

        // Ensure an include parameter is set in case the orderby is set to 'include'.
        if ( ! empty( $request['orderby'] ) && 'include' === $request['orderby'] && empty( $request['include'] ) ) {
            return new WP_Error( 'rest_orderby_include_missing_include', __( 'You need to define an include parameter to order by include.' ), array( 'status' => 400 ) );
        }

        // Retrieve the list of registered collection query parameters.
        $registered = $this->get_collection_params();
        $args = array();

        /*
         * This array defines mappings between public API query parameters whose
         * values are accepted as-passed, and their internal WP_Query parameter
         * name equivalents (some are the same). Only values which are also
         * present in $registered will be set.
         */
        $parameter_mappings = array(
            'author'         => 'author__in',
            'author_exclude' => 'author__not_in',
            'exclude'        => 'post__not_in',
            'include'        => 'post__in',
            'menu_order'     => 'menu_order',
            'offset'         => 'offset',
            'order'          => 'order',
            'orderby'        => 'orderby',
            'page'           => 'paged',
            'parent'         => 'post_parent__in',
            'parent_exclude' => 'post_parent__not_in',
            'search'         => 's',
            'slug'           => 'post_name__in',
            'status'         => 'post_status',
        );

        /*
         * For each known parameter which is both registered and present in the request,
         * set the parameter's value on the query $args.
         */
        foreach ( $parameter_mappings as $api_param => $wp_param ) {
            if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) {
                $args[ $wp_param ] = $request[ $api_param ];
            }
        }

        // Check for & assign any parameters which require special handling or setting.
        $args['date_query'] = array();

        // Set before into date query. Date query must be specified as an array of an array.
        if ( isset( $registered['before'], $request['before'] ) ) {
            $args['date_query'][0]['before'] = $request['before'];
        }

        // Set after into date query. Date query must be specified as an array of an array.
        if ( isset( $registered['after'], $request['after'] ) ) {
            $args['date_query'][0]['after'] = $request['after'];
        }

        // Ensure our per_page parameter overrides any provided posts_per_page filter.
        if ( isset( $registered['per_page'] ) ) {
            $args['posts_per_page'] = $request['per_page'];
        }

        if ( isset( $registered['sticky'], $request['sticky'] ) ) {
            $sticky_posts = get_option( 'sticky_posts', array() );
            if ( ! is_array( $sticky_posts ) ) {
                $sticky_posts = array();
            }
            if ( $request['sticky'] ) {
                /*
                 * As post__in will be used to only get sticky posts,
                 * we have to support the case where post__in was already
                 * specified.
                 */
                $args['post__in'] = $args['post__in'] ? array_intersect( $sticky_posts, $args['post__in'] ) : $sticky_posts;

                /*
                 * If we intersected, but there are no post ids in common,
                 * WP_Query won't return "no posts" for post__in = array()
                 * so we have to fake it a bit.
                 */
                if ( ! $args['post__in'] ) {
                    $args['post__in'] = array( 0 );
                }
            } elseif ( $sticky_posts ) {
                /*
                 * As post___not_in will be used to only get posts that
                 * are not sticky, we have to support the case where post__not_in
                 * was already specified.
                 */
                $args['post__not_in'] = array_merge( $args['post__not_in'], $sticky_posts );
            }
        }

        // Force the post_type argument, since it's not a user input variable.
        $args['post_type'] = $this->post_type;

        /**
         * Filters the query arguments for a request.
         *
         * Enables adding extra arguments or setting defaults for a post collection request.
         *
         * @since 4.7.0
         *
         * @link https://developer.wordpress.org/reference/classes/wp_query/
         *
         * @param array           $args    Key value array of query var to query value.
         * @param WP_REST_Request $request The request used.
         */
        $args = apply_filters( "rest_{$this->post_type}_query", $args, $request );
        $query_args = $this->prepare_items_query( $args, $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;
            $tax_exclude = $base . '_exclude';

            if ( ! empty( $request[ $base ] ) ) {
                $query_args['tax_query'][] = array(
                    'taxonomy'         => $taxonomy->name,
                    'field'            => 'term_id',
                    'terms'            => $request[ $base ],
                    'include_children' => false,
                );
            }

            if ( ! empty( $request[ $tax_exclude ] ) ) {
                $query_args['tax_query'][] = array(
                    'taxonomy'         => $taxonomy->name,
                    'field'            => 'term_id',
                    'terms'            => $request[ $tax_exclude ],
                    'include_children' => false,
                    'operator'         => 'NOT IN',
                );
            }
        }

        $posts_query  = new WP_Query();
        $query_result = $posts_query->query( $query_args );

        // Allow access to all password protected posts if the context is edit.
        if ( 'edit' === $request['context'] ) {
            add_filter( 'post_password_required', '__return_false' );
        }

        $posts = array();

        foreach ( $query_result as $post ) {
            if ( ! $this->check_read_permission( $post ) ) {
                continue;
            }

            $data    = $this->prepare_item_for_response( $post, $request );
            $posts[] = $this->prepare_response_for_collection( $data );
        }

        // Reset filter.
        if ( 'edit' === $request['context'] ) {
            remove_filter( 'post_password_required', '__return_false' );
        }

        $page = (int) $query_args['paged'];
        $total_posts = $posts_query->found_posts;

        if ( $total_posts < 1 ) {
            // Out-of-bounds, run the query again without LIMIT for total count.
            unset( $query_args['paged'] );

            $count_query = new WP_Query();
            $count_query->query( $query_args );
            $total_posts = $count_query->found_posts;
        }

        $max_pages = ceil( $total_posts / (int) $posts_query->query_vars['posts_per_page'] );

        if ( $page > $max_pages && $total_posts > 0 ) {
            return new WP_Error( 'rest_post_invalid_page_number', __( 'The page number requested is larger than the number of pages available.' ), array( 'status' => 400 ) );
        }

        $response  = rest_ensure_response( $posts );

        $response->header( 'X-WP-Total', (int) $total_posts );
        $response->header( 'X-WP-TotalPages', (int) $max_pages );

        $request_params = $request->get_query_params();
        $base = add_query_arg( $request_params, rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ) );

        if ( $page > 1 ) {
            $prev_page = $page - 1;

            if ( $prev_page > $max_pages ) {
                $prev_page = $max_pages;
            }

            $prev_link = add_query_arg( 'page', $prev_page, $base );
            $response->link_header( 'prev', $prev_link );
        }
        if ( $max_pages > $page ) {
            $next_page = $page + 1;
            $next_link = add_query_arg( 'page', $next_page, $base );

            $response->link_header( 'next', $next_link );
        }

        return $response;
    }

    /**
     * Get the post, if the ID is valid.
     *
     * @since 4.7.2
     *
     * @param int $id Supplied ID.
     * @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.
     */
    protected function get_post( $id ) {
        $error = new WP_Error( 'rest_post_invalid_id', __( 'Invalid post ID.' ), array( 'status' => 404 ) );
        if ( (int) $id <= 0 ) {
            return $error;
        }

        $post = get_post( (int) $id );
        if ( empty( $post ) || empty( $post->ID ) || $this->post_type !== $post->post_type ) {
            return $error;
        }

        return $post;
    }

    /**
     * Checks if a given request has access to read a post.
     *
     * @since 4.7.0
     *
     * @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 otherwise.
     */
    public function get_item_permissions_check( $request ) {
        $post = $this->get_post( $request['id'] );
        if ( is_wp_error( $post ) ) {
            return $post;
        }

        if ( 'edit' === $request['context'] && $post && ! $this->check_update_permission( $post ) ) {
            return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to edit this post.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        if ( $post && ! empty( $request['password'] ) ) {
            // Check post password, and return error if invalid.
            if ( ! hash_equals( $post->post_password, $request['password'] ) ) {
                return new WP_Error( 'rest_post_incorrect_password', __( 'Incorrect post password.' ), array( 'status' => 403 ) );
            }
        }

        // Allow access to all password protected posts if the context is edit.
        if ( 'edit' === $request['context'] ) {
            add_filter( 'post_password_required', '__return_false' );
        }

        if ( $post ) {
            return $this->check_read_permission( $post );
        }

        return true;
    }

    /**
     * Checks if the user can access password-protected content.
     *
     * This method determines whether we need to override the regular password
     * check in core with a filter.
     *
     * @since 4.7.0
     *
     * @param WP_Post         $post    Post to check against.
     * @param WP_REST_Request $request Request data to check.
     * @return bool True if the user can access password-protected content, otherwise false.
     */
    public function can_access_password_content( $post, $request ) {
        if ( empty( $post->post_password ) ) {
            // No filter required.
            return false;
        }

        // Edit context always gets access to password-protected posts.
        if ( 'edit' === $request['context'] ) {
            return true;
        }

        // No password, no auth.
        if ( empty( $request['password'] ) ) {
            return false;
        }

        // Double-check the request password.
        return hash_equals( $post->post_password, $request['password'] );
    }

    /**
     * Retrieves a single post.
     *
     * @since 4.7.0
     *
     * @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 get_item( $request ) {
        $post = $this->get_post( $request['id'] );
        if ( is_wp_error( $post ) ) {
            return $post;
        }

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

        if ( is_post_type_viewable( get_post_type_object( $post->post_type ) ) ) {
            $response->link_header( 'alternate',  get_permalink( $post->ID ), array( 'type' => 'text/html' ) );
        }

        return $response;
    }

    /**
     * Checks if a given request has access to create a post.
     *
     * @since 4.7.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return true|WP_Error True if the request has access to create items, WP_Error object otherwise.
     */
    public function create_item_permissions_check( $request ) {
        if ( ! empty( $request['id'] ) ) {
            return new WP_Error( 'rest_post_exists', __( 'Cannot create existing post.' ), array( 'status' => 400 ) );
        }

        $post_type = get_post_type_object( $this->post_type );

        if ( ! empty( $request['author'] ) && get_current_user_id() !== $request['author'] && ! current_user_can( $post_type->cap->edit_others_posts ) ) {
            return new WP_Error( 'rest_cannot_edit_others', __( 'Sorry, you are not allowed to create posts as this user.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        if ( ! empty( $request['sticky'] ) && ! current_user_can( $post_type->cap->edit_others_posts ) ) {
            return new WP_Error( 'rest_cannot_assign_sticky', __( 'Sorry, you are not allowed to make posts sticky.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        if ( ! current_user_can( $post_type->cap->create_posts ) ) {
            return new WP_Error( 'rest_cannot_create', __( 'Sorry, you are not allowed to create posts as this user.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        if ( ! $this->check_assign_terms_permission( $request ) ) {
            return new WP_Error( 'rest_cannot_assign_term', __( 'Sorry, you are not allowed to assign the provided terms.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        return true;
    }

    /**
     * Creates a single post.
     *
     * @since 4.7.0
     *
     * @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_post = $this->prepare_item_for_database( $request );

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

        $prepared_post->post_type = $this->post_type;

        $post_id = wp_insert_post( wp_slash( (array) $prepared_post ), true );

        if ( is_wp_error( $post_id ) ) {

            if ( 'db_insert_error' === $post_id->get_error_code() ) {
                $post_id->add_data( array( 'status' => 500 ) );
            } else {
                $post_id->add_data( array( 'status' => 400 ) );
            }

            return $post_id;
        }

        $post = get_post( $post_id );

        /**
         * Fires after a single post is created or updated via the REST API.
         *
         * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
         *
         * @since 4.7.0
         *
         * @param WP_Post         $post     Inserted or updated post object.
         * @param WP_REST_Request $request  Request object.
         * @param bool            $creating True when creating a post, false when updating.
         */
        do_action( "rest_insert_{$this->post_type}", $post, $request, true );

        $schema = $this->get_item_schema();

        if ( ! empty( $schema['properties']['sticky'] ) ) {
            if ( ! empty( $request['sticky'] ) ) {
                stick_post( $post_id );
            } else {
                unstick_post( $post_id );
            }
        }

        if ( ! empty( $schema['properties']['featured_media'] ) && isset( $request['featured_media'] ) ) {
            $this->handle_featured_media( $request['featured_media'], $post_id );
        }

        if ( ! empty( $schema['properties']['format'] ) && ! empty( $request['format'] ) ) {
            set_post_format( $post, $request['format'] );
        }

        if ( ! empty( $schema['properties']['template'] ) && isset( $request['template'] ) ) {
            $this->handle_template( $request['template'], $post_id, true );
        }

        $terms_update = $this->handle_terms( $post_id, $request );

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

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

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

        $post = get_post( $post_id );
        $fields_update = $this->update_additional_fields_for_object( $post, $request );

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

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

        $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, $post_id ) ) );

        return $response;
    }

    /**
     * Checks if a given request has access to update a post.
     *
     * @since 4.7.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise.
     */
    public function update_item_permissions_check( $request ) {
        $post = $this->get_post( $request['id'] );
        if ( is_wp_error( $post ) ) {
            return $post;
        }

        $post_type = get_post_type_object( $this->post_type );

        if ( $post && ! $this->check_update_permission( $post ) ) {
            return new WP_Error( 'rest_cannot_edit', __( 'Sorry, you are not allowed to edit this post.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        if ( ! empty( $request['author'] ) && get_current_user_id() !== $request['author'] && ! current_user_can( $post_type->cap->edit_others_posts ) ) {
            return new WP_Error( 'rest_cannot_edit_others', __( 'Sorry, you are not allowed to update posts as this user.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        if ( ! empty( $request['sticky'] ) && ! current_user_can( $post_type->cap->edit_others_posts ) ) {
            return new WP_Error( 'rest_cannot_assign_sticky', __( 'Sorry, you are not allowed to make posts sticky.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        if ( ! $this->check_assign_terms_permission( $request ) ) {
            return new WP_Error( 'rest_cannot_assign_term', __( 'Sorry, you are not allowed to assign the provided terms.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        return true;
    }

    /**
     * Updates a single post.
     *
     * @since 4.7.0
     *
     * @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_post( $request['id'] );
        if ( is_wp_error( $valid_check ) ) {
            return $valid_check;
        }

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

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

        // convert the post object to an array, otherwise wp_update_post will expect non-escaped input.
        $post_id = wp_update_post( wp_slash( (array) $post ), true );

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

        $post = get_post( $post_id );

        /** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php */
        do_action( "rest_insert_{$this->post_type}", $post, $request, false );

        $schema = $this->get_item_schema();

        if ( ! empty( $schema['properties']['format'] ) && ! empty( $request['format'] ) ) {
            set_post_format( $post, $request['format'] );
        }

        if ( ! empty( $schema['properties']['featured_media'] ) && isset( $request['featured_media'] ) ) {
            $this->handle_featured_media( $request['featured_media'], $post_id );
        }

        if ( ! empty( $schema['properties']['sticky'] ) && isset( $request['sticky'] ) ) {
            if ( ! empty( $request['sticky'] ) ) {
                stick_post( $post_id );
            } else {
                unstick_post( $post_id );
            }
        }

        if ( ! empty( $schema['properties']['template'] ) && isset( $request['template'] ) ) {
            $this->handle_template( $request['template'], $post->ID );
        }

        $terms_update = $this->handle_terms( $post->ID, $request );

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

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

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

        $post = get_post( $post_id );
        $fields_update = $this->update_additional_fields_for_object( $post, $request );

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

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

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

        return rest_ensure_response( $response );
    }

    /**
     * Checks if a given request has access to delete a post.
     *
     * @since 4.7.0
     *
     * @param WP_REST_Request $request Full details about the request.
     * @return true|WP_Error True if the request has access to delete the item, WP_Error object otherwise.
     */
    public function delete_item_permissions_check( $request ) {
        $post = $this->get_post( $request['id'] );
        if ( is_wp_error( $post ) ) {
            return $post;
        }

        if ( $post && ! $this->check_delete_permission( $post ) ) {
            return new WP_Error( 'rest_cannot_delete', __( 'Sorry, you are not allowed to delete this post.' ), array( 'status' => rest_authorization_required_code() ) );
        }

        return true;
    }

    /**
     * Deletes a single post.
     *
     * @since 4.7.0
     *
     * @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 delete_item( $request ) {
        $post = $this->get_post( $request['id'] );
        if ( is_wp_error( $post ) ) {
            return $post;
        }

        $id    = $post->ID;
        $force = (bool) $request['force'];

        $supports_trash = ( EMPTY_TRASH_DAYS > 0 );

        if ( 'attachment' === $post->post_type ) {
            $supports_trash = $supports_trash && MEDIA_TRASH;
        }

        /**
         * Filters whether a post is trashable.
         *
         * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
         *
         * Pass false to disable trash support for the post.
         *
         * @since 4.7.0
         *
         * @param bool    $supports_trash Whether the post type support trashing.
         * @param WP_Post $post           The Post object being considered for trashing support.
         */
        $supports_trash = apply_filters( "rest_{$this->post_type}_trashable", $supports_trash, $post );

        if ( ! $this->check_delete_permission( $post ) ) {
            return new WP_Error( 'rest_user_cannot_delete_post', __( 'Sorry, you are not allowed to delete this post.' ), array( 'status' => rest_authorization_required_code() ) );
        }

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


        // If we're forcing, then delete permanently.
        if ( $force ) {
            $previous = $this->prepare_item_for_response( $post, $request );
            $result = wp_delete_post( $id, true );
            $response = new WP_REST_Response();
            $response->set_data( array( 'deleted' => true, 'previous' => $previous->get_data() ) );
        } else {
            // If we don't support trashing for this type, error out.
            if ( ! $supports_trash ) {
                /* translators: %s: force=true */
                return new WP_Error( 'rest_trash_not_supported', sprintf( __( "The post does not support trashing. Set '%s' to delete." ), 'force=true' ), array( 'status' => 501 ) );
            }

            // Otherwise, only trash if we haven't already.
            if ( 'trash' === $post->post_status ) {
                return new WP_Error( 'rest_already_trashed', __( 'The post has already been deleted.' ), array( 'status' => 410 ) );
            }

            // (Note that internally this falls through to `wp_delete_post` if
            // the trash is disabled.)
            $result = wp_trash_post( $id );
            $post = get_post( $id );
            $response = $this->prepare_item_for_response( $post, $request );
        }

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

        /**
         * Fires immediately after a single post is deleted or trashed via the REST API.
         *
         * They dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
         *
         * @since 4.7.0
         *
         * @param object           $post     The deleted or trashed post.
         * @param WP_REST_Response $response The response data.
         * @param WP_REST_Request  $request  The request sent to the API.
         */
        do_action( "rest_delete_{$this->post_type}", $post, $response, $request );

        return $response;
    }

    /**
     * Determines the allowed query_vars for a get_items() response and prepares
     * them for WP_Query.
     *
     * @since 4.7.0
     *
     * @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 = array();

        foreach ( $prepared_args as $key => $value ) {
            /**
             * Filters the query_vars used in get_items() for the constructed query.
             *
             * The dynamic portion of the hook name, `$key`, refers to the query_var key.
             *
             * @since 4.7.0
             *
             * @param string $value The query_var value.
             */
            $query_args[ $key ] = apply_filters( "rest_query_var-{$key}", $value );
        }

        if ( 'post' !== $this->post_type || ! isset( $query_args['ignore_sticky_posts'] ) ) {
            $query_args['ignore_sticky_posts'] = true;
        }

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

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

        return $query_args;
    }

    /**
     * Checks the post_date_gmt or modified_gmt and prepare any post or
     * modified date for single post output.
     *
     * @since 4.7.0
     *
     * @param string      $date_gmt GMT publication time.
     * @param string|null $date     Optional. Local publication time. Default null.
     * @return string|null ISO8601/RFC3339 formatted datetime.
     */
    protected function prepare_date_response( $date_gmt, $date = null ) {
        // Use the date if passed.
        if ( isset( $date ) ) {
            return mysql_to_rfc3339( $date );
        }

        // Return null if $date_gmt is empty/zeros.
        if ( '0000-00-00 00:00:00' === $date_gmt ) {
            return null;
        }

        // Return the formatted datetime.
        return mysql_to_rfc3339( $date_gmt );
    }

    /**
     * Prepares a single post for create or update.
     *
     * @since 4.7.0
     *
     * @param WP_REST_Request $request Request object.
     * @return stdClass|WP_Error Post object or WP_Error.
     */
    protected function prepare_item_for_database( $request ) {
        $prepared_post = new stdClass;

        // Post ID.
        if ( isset( $request['id'] ) ) {
            $existing_post = $this->get_post( $request['id'] );
            if ( is_wp_error( $existing_post ) ) {
                return $existing_post;
            }

            $prepared_post->ID = $existing_post->ID;
        }

        $schema = $this->get_item_schema();

        // Post title.
        if ( ! empty( $schema['properties']['title'] ) && isset( $request['title'] ) ) {
            if ( is_string( $request['title'] ) ) {
                $prepared_post->post_title = $request['title'];
            } elseif ( ! empty( $request['title']['raw'] ) ) {
                $prepared_post->post_title = $request['title']['raw'];
            }
        }

        // Post content.
        if ( ! empty( $schema['properties']['content'] ) && isset( $request['content'] ) ) {
            if ( is_string( $request['content'] ) ) {
                $prepared_post->post_content = $request['content'];
            } elseif ( isset( $request['content']['raw'] ) ) {
                $prepared_post->post_content = $request['content']['raw'];
            }
        }

        // Post excerpt.
        if ( ! empty( $schema['properties']['excerpt'] ) && isset( $request['excerpt'] ) ) {
            if ( is_string( $request['excerpt'] ) ) {
                $prepared_post->post_excerpt = $request['excerpt'];
            } elseif ( isset( $request['excerpt']['raw'] ) ) {
                $prepared_post->post_excerpt = $request['excerpt']['raw'];
            }
        }

        // Post type.
        if ( empty( $request['id'] ) ) {
            // Creating new post, use default type for the controller.
            $prepared_post->post_type = $this->post_type;
        } else {
            // Updating a post, use previous type.
            $prepared_post->post_type = get_post_type( $request['id'] );
        }

        $post_type = get_post_type_object( $prepared_post->post_type );

        // Post status.
        if ( ! empty( $schema['properties']['status'] ) && isset( $request['status'] ) ) {
            $status = $this->handle_status_param( $request['status'], $post_type );

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

            $prepared_post->post_status = $status;
        }

        // Post date.
        if ( ! empty( $schema['properties']['date'] ) && ! empty( $request['date'] ) ) {
            $date_data = rest_get_date_with_gmt( $request['date'] );

            if ( ! empty( $date_data ) ) {
                list( $prepared_post->post_date, $prepared_post->post_date_gmt ) = $date_data;
                $prepared_post->edit_date = true;
            }
        } elseif ( ! empty( $schema['properties']['date_gmt'] ) && ! empty( $request['date_gmt'] ) ) {
            $date_data = rest_get_date_with_gmt( $request['date_gmt'], true );

            if ( ! empty( $date_data ) ) {
                list( $prepared_post->post_date, $prepared_post->post_date_gmt ) = $date_data;
                $prepared_post->edit_date = true;
            }
        }

        // Post slug.
        if ( ! empty( $schema['properties']['slug'] ) && isset( $request['slug'] ) ) {
            $prepared_post->post_name = $request['slug'];
        }

        // Author.
        if ( ! empty( $schema['properties']['author'] ) && ! empty( $request['author'] ) ) {
            $post_author = (int) $request['author'];

            if ( get_current_user_id() !== $post_author ) {
                $user_obj = get_userdata( $post_author );

                if ( ! $user_obj ) {
                    return new WP_Error( 'rest_invalid_author', __( 'Invalid author ID.' ), array( 'status' => 400 ) );
                }
            }

            $prepared_post->post_author = $post_author;
        }

        // Post password.
        if ( ! empty( $schema['properties']['password'] ) && isset( $request['password'] ) ) {
            $prepared_post->post_password = $request['password'];

            if ( '' !== $request['password'] ) {
                if ( ! empty( $schema['properties']['sticky'] ) && ! empty( $request['sticky'] ) ) {
                    return new WP_Error( 'rest_invalid_field', __( 'A post can not be sticky and have a password.' ), array( 'status' => 400 ) );
                }

                if ( ! empty( $prepared_post->ID ) && is_sticky( $prepared_post->ID ) ) {
                    return new WP_Error( 'rest_invalid_field', __( 'A sticky post can not be password protected.' ), array( 'status' => 400 ) );
                }
            }
        }

        if ( ! empty( $schema['properties']['sticky'] ) && ! empty( $request['sticky'] ) ) {
            if ( ! empty( $prepared_post->ID ) && post_password_required( $prepared_post->ID ) ) {
                return new WP_Error( 'rest_invalid_field', __( 'A password protected post can not be set to sticky.' ), array( 'status' => 400 ) );
            }
        }

        // Parent.
        if ( ! empty( $schema['properties']['parent'] ) && isset( $request['parent'] ) ) {
            if ( 0 === (int) $request['parent'] ) {
                $prepared_post->post_parent = 0;
            } else {
                $parent = get_post( (int) $request['parent'] );
                if ( empty( $parent ) ) {
                    return new WP_Error( 'rest_post_invalid_id', __( 'Invalid post parent ID.' ), array( 'status' => 400 ) );
                }
                $prepared_post->post_parent = (int) $parent->ID;
            }
        }

        // Menu order.
        if ( ! empty( $schema['properties']['menu_order'] ) && isset( $request['menu_order'] ) ) {
            $prepared_post->menu_order = (int) $request['menu_order'];
        }

        // Comment status.
        if ( ! empty( $schema['properties']['comment_status'] ) && ! empty( $request['comment_status'] ) ) {
            $prepared_post->comment_status = $request['comment_status'];
        }

        // Ping status.
        if ( ! empty( $schema['properties']['ping_status'] ) && ! empty( $request['ping_status'] ) ) {
            $prepared_post->ping_status = $request['ping_status'];
        }

        if ( ! empty( $schema['properties']['template'] ) ) {
            // Force template to null so that it can be handled exclusively by the REST controller.
            $prepared_post->page_template = null;
        }

        /**
         * Filters a post before it is inserted via the REST API.
         *
         * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
         *
         * @since 4.7.0
         *
         * @param stdClass        $prepared_post An object representing a single post prepared
         *                                       for inserting or updating the database.
         * @param WP_REST_Request $request       Request object.
         */
        return apply_filters( "rest_pre_insert_{$this->post_type}", $prepared_post, $request );

    }

    /**
     * Determines validity and normalizes the given status parameter.
     *
     * @since 4.7.0
     *
     * @param string $post_status Post status.
     * @param object $post_type   Post type.
     * @return string|WP_Error Post status or WP_Error if lacking the proper permission.
     */
    protected function handle_status_param( $post_status, $post_type ) {

        switch ( $post_status ) {
            case 'draft':
            case 'pending':
                break;
            case 'private':
                if ( ! current_user_can( $post_type->cap->publish_posts ) ) {
                    return new WP_Error( 'rest_cannot_publish', __( 'Sorry, you are not allowed to create private posts in this post type.' ), array( 'status' => rest_authorization_required_code() ) );
                }
                break;
            case 'publish':
            case 'future':
                if ( ! current_user_can( $post_type->cap->publish_posts ) ) {
                    return new WP_Error( 'rest_cannot_publish', __( 'Sorry, you are not allowed to publish posts in this post type.' ), array( 'status' => rest_authorization_required_code() ) );
                }
                break;
            default:
                if ( ! get_post_status_object( $post_status ) ) {
                    $post_status = 'draft';
                }
                break;
        }

        return $post_status;
    }

    /**
     * Determines the featured media based on a request param.
     *
     * @since 4.7.0
     *
     * @param int $featured_media Featured Media ID.
     * @param int $post_id        Post ID.
     * @return bool|WP_Error Whether the post thumbnail was successfully deleted, otherwise WP_Error.
     */
    protected function handle_featured_media( $featured_media, $post_id ) {

        $featured_media = (int) $featured_media;
        if ( $featured_media ) {
            $result = set_post_thumbnail( $post_id, $featured_media );
            if ( $result ) {
                return true;
            } else {
                return new WP_Error( 'rest_invalid_featured_media', __( 'Invalid featured media ID.' ), array( 'status' => 400 ) );
            }
        } else {
            return delete_post_thumbnail( $post_id );
        }

    }

    /**
     * Check whether the template is valid for the given post.
     *
     * @since 4.9.0
     *
     * @param string          $template Page template filename.
     * @param WP_REST_Request $request  Request.
     * @return bool|WP_Error True if template is still valid or if the same as existing value, or false if template not supported.
     */
    public function check_template( $template, $request ) {

        if ( ! $template ) {
            return true;
        }

        if ( $request['id'] ) {
            $current_template = get_page_template_slug( $request['id'] );
        } else {
            $current_template = '';
        }

        // Always allow for updating a post to the same template, even if that template is no longer supported.
        if ( $template === $current_template ) {
            return true;
        }

        // If this is a create request, get_post() will return null and wp theme will fallback to the passed post type.
        $allowed_templates = wp_get_theme()->get_page_templates( get_post( $request['id'] ), $this->post_type );

        if ( isset( $allowed_templates[ $template ] ) ) {
            return true;
        }

        /* translators: 1: parameter, 2: list of valid values */
        return new WP_Error( 'rest_invalid_param', sprintf( __( '%1$s is not one of %2$s.' ), 'template', implode( ', ', array_keys( $allowed_templates ) ) ) );
    }

    /**
     * Sets the template for a post.
     *
     * @since 4.7.0
     * @since 4.9.0 Introduced the $validate parameter.
     *
     * @param string  $template Page template filename.
     * @param integer $post_id  Post ID.
     * @param bool    $validate Whether to validate that the template selected is valid.
     */
    public function handle_template( $template, $post_id, $validate = false ) {

        if ( $validate && ! array_key_exists( $template, wp_get_theme()->get_page_templates( get_post( $post_id ) ) ) ) {
            $template = '';
        }

        update_post_meta( $post_id, '_wp_page_template', $template );
    }

    /**
     * Updates the post's terms from a REST request.
     *
     * @since 4.7.0
     *
     * @param int             $post_id The post ID to update the terms form.
     * @param WP_REST_Request $request The request object with post and terms data.
     * @return null|WP_Error WP_Error on an error assigning any of the terms, otherwise null.
     */
    protected function handle_terms( $post_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 ( ! isset( $request[ $base ] ) ) {
                continue;
            }

            $result = wp_set_object_terms( $post_id, $request[ $base ], $taxonomy->name );

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

    /**
     * Checks whether current user can assign all terms sent with the current request.
     *
     * @since 4.7.0
     *
     * @param WP_REST_Request $request The request object with post and terms data.
     * @return bool Whether the current user can assign the provided terms.
     */
    protected function check_assign_terms_permission( $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 ( ! isset( $request[ $base ] ) ) {
                continue;
            }

            foreach ( $request[ $base ] as $term_id ) {
                // Invalid terms will be rejected later.
                if ( ! get_term( $term_id, $taxonomy->name ) ) {
                    continue;
                }

                if ( ! current_user_can( 'assign_term', (int) $term_id ) ) {
                    return false;
                }
            }
        }

        return true;
    }

    /**
     * Checks if a given post type can be viewed or managed.
     *
     * @since 4.7.0
     *
     * @param object|string $post_type Post type name or object.
     * @return bool Whether the post type is allowed in REST.
     */
    protected function check_is_post_type_allowed( $post_type ) {
        if ( ! is_object( $post_type ) ) {
            $post_type = get_post_type_object( $post_type );
        }

        if ( ! empty( $post_type ) && ! empty( $post_type->show_in_rest ) ) {
            return true;
        }

        return false;
    }

    /**
     * Checks if a post can be read.
     *
     * Correctly handles posts with the inherit status.
     *
     * @since 4.7.0
     *
     * @param object $post Post object.
     * @return bool Whether the post can be read.
     */
    public function check_read_permission( $post ) {
        $post_type = get_post_type_object( $post->post_type );
        if ( ! $this->check_is_post_type_allowed( $post_type ) ) {
            return false;
        }

        // Is the post readable?
        if ( 'publish' === $post->post_status || current_user_can( $post_type->cap->read_post, $post->ID ) ) {
            return true;
        }

        $post_status_obj = get_post_status_object( $post->post_status );
        if ( $post_status_obj && $post_status_obj->public ) {
            return true;
        }

        // Can we read the parent if we're inheriting?
        if ( 'inherit' === $post->post_status && $post->post_parent > 0 ) {
            $parent = get_post( $post->post_parent );
            if ( $parent ) {
                return $this->check_read_permission( $parent );
            }
        }

        /*
         * If there isn't a parent, but the status is set to inherit, assume
         * it's published (as per get_post_status()).
         */
        if ( 'inherit' === $post->post_status ) {
            return true;
        }

        return false;
    }

    /**
     * Checks if a post can be edited.
     *
     * @since 4.7.0
     *
     * @param object $post Post object.
     * @return bool Whether the post can be edited.
     */
    protected function check_update_permission( $post ) {
        $post_type = get_post_type_object( $post->post_type );

        if ( ! $this->check_is_post_type_allowed( $post_type ) ) {
            return false;
        }

        return current_user_can( $post_type->cap->edit_post, $post->ID );
    }

    /**
     * Checks if a post can be created.
     *
     * @since 4.7.0
     *
     * @param object $post Post object.
     * @return bool Whether the post can be created.
     */
    protected function check_create_permission( $post ) {
        $post_type = get_post_type_object( $post->post_type );

        if ( ! $this->check_is_post_type_allowed( $post_type ) ) {
            return false;
        }

        return current_user_can( $post_type->cap->create_posts );
    }

    /**
     * Checks if a post can be deleted.
     *
     * @since 4.7.0
     *
     * @param object $post Post object.
     * @return bool Whether the post can be deleted.
     */
    protected function check_delete_permission( $post ) {
        $post_type = get_post_type_object( $post->post_type );

        if ( ! $this->check_is_post_type_allowed( $post_type ) ) {
            return false;
        }

        return current_user_can( $post_type->cap->delete_post, $post->ID );
    }

    /**
     * Prepares a single post output for response.
     *
     * @since 4.7.0
     *
     * @param WP_Post         $post    Post object.
     * @param WP_REST_Request $request Request object.
     * @return WP_REST_Response Response object.
     */
    public function prepare_item_for_response( $post, $request ) {
        $GLOBALS['post'] = $post;

        setup_postdata( $post );

        $schema = $this->get_item_schema();

        // Base fields for every post.
        $data = array();

        if ( ! empty( $schema['properties']['id'] ) ) {
            $data['id'] = $post->ID;
        }

        if ( ! empty( $schema['properties']['date'] ) ) {
            $data['date'] = $this->prepare_date_response( $post->post_date_gmt, $post->post_date );
        }

        if ( ! empty( $schema['properties']['date_gmt'] ) ) {
            // For drafts, `post_date_gmt` may not be set, indicating that the
            // date of the draft should be updated each time it is saved (see
            // #38883).  In this case, shim the value based on the `post_date`
            // field with the site's timezone offset applied.
            if ( '0000-00-00 00:00:00' === $post->post_date_gmt ) {
                $post_date_gmt = get_gmt_from_date( $post->post_date );
            } else {
                $post_date_gmt = $post->post_date_gmt;
            }
            $data['date_gmt'] = $this->prepare_date_response( $post_date_gmt );
        }

        if ( ! empty( $schema['properties']['guid'] ) ) {
            $data['guid'] = array(
                /** This filter is documented in wp-includes/post-template.php */
                'rendered' => apply_filters( 'get_the_guid', $post->guid, $post->ID ),
                'raw'      => $post->guid,
            );
        }

        if ( ! empty( $schema['properties']['modified'] ) ) {
            $data['modified'] = $this->prepare_date_response( $post->post_modified_gmt, $post->post_modified );
        }

        if ( ! empty( $schema['properties']['modified_gmt'] ) ) {
            // For drafts, `post_modified_gmt` may not be set (see
            // `post_date_gmt` comments above).  In this case, shim the value
            // based on the `post_modified` field with the site's timezone
            // offset applied.
            if ( '0000-00-00 00:00:00' === $post->post_modified_gmt ) {
                $post_modified_gmt = date( 'Y-m-d H:i:s', strtotime( $post->post_modified ) - ( get_option( 'gmt_offset' ) * 3600 ) );
            } else {
                $post_modified_gmt = $post->post_modified_gmt;
            }
            $data['modified_gmt'] = $this->prepare_date_response( $post_modified_gmt );
        }

        if ( ! empty( $schema['properties']['password'] ) ) {
            $data['password'] = $post->post_password;
        }

        if ( ! empty( $schema['properties']['slug'] ) ) {
            $data['slug'] = $post->post_name;
        }

        if ( ! empty( $schema['properties']['status'] ) ) {
            $data['status'] = $post->post_status;
        }

        if ( ! empty( $schema['properties']['type'] ) ) {
            $data['type'] = $post->post_type;
        }

        if ( ! empty( $schema['properties']['link'] ) ) {
            $data['link'] = get_permalink( $post->ID );
        }

        if ( ! empty( $schema['properties']['title'] ) ) {
            add_filter( 'protected_title_format', array( $this, 'protected_title_format' ) );

            $data['title'] = array(
                'raw'      => $post->post_title,
                'rendered' => get_the_title( $post->ID ),
            );

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

        $has_password_filter = false;

        if ( $this->can_access_password_content( $post, $request ) ) {
            // Allow access to the post, permissions already checked before.
            add_filter( 'post_password_required', '__return_false' );

            $has_password_filter = true;
        }

        if ( ! empty( $schema['properties']['content'] ) ) {
            $data['content'] = array(
                'raw'       => $post->post_content,
                /** This filter is documented in wp-includes/post-template.php */
                'rendered'  => post_password_required( $post ) ? '' : apply_filters( 'the_content', $post->post_content ),
                'protected' => (bool) $post->post_password,
            );
        }

        if ( ! empty( $schema['properties']['excerpt'] ) ) {
            /** This filter is documented in wp-includes/post-template.php */
            $excerpt = apply_filters( 'the_excerpt', apply_filters( 'get_the_excerpt', $post->post_excerpt, $post ) );
            $data['excerpt'] = array(
                'raw'       => $post->post_excerpt,
                'rendered'  => post_password_required( $post ) ? '' : $excerpt,
                'protected' => (bool) $post->post_password,
            );
        }

        if ( $has_password_filter ) {
            // Reset filter.
            remove_filter( 'post_password_required', '__return_false' );
        }

        if ( ! empty( $schema['properties']['author'] ) ) {
            $data['author'] = (int) $post->post_author;
        }

        if ( ! empty( $schema['properties']['featured_media'] ) ) {
            $data['featured_media'] = (int) get_post_thumbnail_id( $post->ID );
        }

        if ( ! empty( $schema['properties']['parent'] ) ) {
            $data['parent'] = (int) $post->post_parent;
        }

        if ( ! empty( $schema['properties']['menu_order'] ) ) {
            $data['menu_order'] = (int) $post->menu_order;
        }

        if ( ! empty( $schema['properties']['comment_status'] ) ) {
            $data['comment_status'] = $post->comment_status;
        }

        if ( ! empty( $schema['properties']['ping_status'] ) ) {
            $data['ping_status'] = $post->ping_status;
        }

        if ( ! empty( $schema['properties']['sticky'] ) ) {
            $data['sticky'] = is_sticky( $post->ID );
        }

        if ( ! empty( $schema['properties']['template'] ) ) {
            if ( $template = get_page_template_slug( $post->ID ) ) {
                $data['template'] = $template;
            } else {
                $data['template'] = '';
            }
        }

        if ( ! empty( $schema['properties']['format'] ) ) {
            $data['format'] = get_post_format( $post->ID );

            // Fill in blank post format.
            if ( empty( $data['format'] ) ) {
                $data['format'] = 'standard';
            }
        }

        if ( ! empty( $schema['properties']['meta'] ) ) {
            $data['meta'] = $this->meta->get_value( $post->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 ( ! empty( $schema['properties'][ $base ] ) ) {
                $terms = get_the_terms( $post, $taxonomy->name );
                $data[ $base ] = $terms ? array_values( wp_list_pluck( $terms, 'term_id' ) ) : array();
            }
        }

        $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 );

        $response->add_links( $this->prepare_links( $post ) );

        /**
         * Filters the post data for a response.
         *
         * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
         *
         * @since 4.7.0
         *
         * @param WP_REST_Response $response The response object.
         * @param WP_Post          $post     Post object.
         * @param WP_REST_Request  $request  Request object.
         */
        return apply_filters( "rest_prepare_{$this->post_type}", $response, $post, $request );
    }

    /**
     * Overwrites the default protected title format.
     *
     * By default, WordPress will show password protected posts with a title of
     * "Protected: %s", as the REST API communicates the protected status of a post
     * in a machine readable format, we remove the "Protected: " prefix.
     *
     * @since 4.7.0
     *
     * @return string Protected title format.
     */
    public function protected_title_format() {
        return '%s';
    }

    /**
     * Prepares links for the request.
     *
     * @since 4.7.0
     *
     * @param WP_Post $post Post object.
     * @return array Links for the given post.
     */
    protected function prepare_links( $post ) {
        $base = sprintf( '%s/%s', $this->namespace, $this->rest_base );

        // Entity meta.
        $links = array(
            'self' => array(
                'href'   => rest_url( trailingslashit( $base ) . $post->ID ),
            ),
            'collection' => array(
                'href'   => rest_url( $base ),
            ),
            'about'      => array(
                'href'   => rest_url( 'wp/v2/types/' . $this->post_type ),
            ),
        );

        if ( ( in_array( $post->post_type, array( 'post', 'page' ), true ) || post_type_supports( $post->post_type, 'author' ) )
            && ! empty( $post->post_author ) ) {
            $links['author'] = array(
                'href'       => rest_url( 'wp/v2/users/' . $post->post_author ),
                'embeddable' => true,
            );
        }

        if ( in_array( $post->post_type, array( 'post', 'page' ), true ) || post_type_supports( $post->post_type, 'comments' ) ) {
            $replies_url = rest_url( 'wp/v2/comments' );
            $replies_url = add_query_arg( 'post', $post->ID, $replies_url );

            $links['replies'] = array(
                'href'       => $replies_url,
                'embeddable' => true,
            );
        }

        if ( in_array( $post->post_type, array( 'post', 'page' ), true ) || post_type_supports( $post->post_type, 'revisions' ) ) {
            $links['version-history'] = array(
                'href' => rest_url( trailingslashit( $base ) . $post->ID . '/revisions' ),
            );
        }

        $post_type_obj = get_post_type_object( $post->post_type );

        if ( $post_type_obj->hierarchical && ! empty( $post->post_parent ) ) {
            $links['up'] = array(
                'href'       => rest_url( trailingslashit( $base ) . (int) $post->post_parent ),
                'embeddable' => true,
            );
        }

        // If we have a featured media, add that.
        if ( $featured_media = get_post_thumbnail_id( $post->ID ) ) {
            $image_url = rest_url( 'wp/v2/media/' . $featured_media );

            $links['https://api.w.org/featuredmedia'] = array(
                'href'       => $image_url,
                'embeddable' => true,
            );
        }

        if ( ! in_array( $post->post_type, array( 'attachment', 'nav_menu_item', 'revision' ), true ) ) {
            $attachments_url = rest_url( 'wp/v2/media' );
            $attachments_url = add_query_arg( 'parent', $post->ID, $attachments_url );

            $links['https://api.w.org/attachment'] = array(
                'href' => $attachments_url,
            );
        }

        $taxonomies = get_object_taxonomies( $post->post_type );

        if ( ! empty( $taxonomies ) ) {
            $links['https://api.w.org/term'] = array();

            foreach ( $taxonomies as $tax ) {
                $taxonomy_obj = get_taxonomy( $tax );

                // Skip taxonomies that are not public.
                if ( empty( $taxonomy_obj->show_in_rest ) ) {
                    continue;
                }

                $tax_base = ! empty( $taxonomy_obj->rest_base ) ? $taxonomy_obj->rest_base : $tax;

                $terms_url = add_query_arg(
                    'post',
                    $post->ID,
                    rest_url( 'wp/v2/' . $tax_base )
                );

                $links['https://api.w.org/term'][] = array(
                    'href'       => $terms_url,
                    'taxonomy'   => $tax,
                    'embeddable' => true,
                );
            }
        }

        return $links;
    }

    /**
     * Retrieves the post's schema, conforming to JSON Schema.
     *
     * @since 4.7.0
     *
     * @return array Item schema data.
     */
    public function get_item_schema() {

        $schema = array(
            '$schema'    => 'http://json-schema.org/draft-04/schema#',
            'title'      => $this->post_type,
            'type'       => 'object',
            // Base properties for every Post.
            'properties' => array(
                'date'            => array(
                    'description' => __( "The date the object was published, in the site's timezone." ),
                    'type'        => 'string',
                    'format'      => 'date-time',
                    'context'     => array( 'view', 'edit', 'embed' ),
                ),
                'date_gmt'        => array(
                    'description' => __( 'The date the object was published, as GMT.' ),
                    'type'        => 'string',
                    'format'      => 'date-time',
                    'context'     => array( 'view', 'edit' ),
                ),
                'guid'            => array(
                    'description' => __( 'The globally unique identifier for the object.' ),
                    'type'        => 'object',
                    'context'     => array( 'view', 'edit' ),
                    'readonly'    => true,
                    'properties'  => array(
                        'raw'      => array(
                            'description' => __( 'GUID for the object, as it exists in the database.' ),
                            'type'        => 'string',
                            'context'     => array( 'edit' ),
                            'readonly'    => true,
                        ),
                        'rendered' => array(
                            'description' => __( 'GUID for the object, transformed for display.' ),
                            'type'        => 'string',
                            'context'     => array( 'view', 'edit' ),
                            'readonly'    => true,
                        ),
                    ),
                ),
                'id'              => array(
                    'description' => __( 'Unique identifier for the object.' ),
                    'type'        => 'integer',
                    'context'     => array( 'view', 'edit', 'embed' ),
                    'readonly'    => true,
                ),
                'link'            => array(
                    'description' => __( 'URL to the object.' ),
                    'type'        => 'string',
                    'format'      => 'uri',
                    'context'     => array( 'view', 'edit', 'embed' ),
                    'readonly'    => true,
                ),
                'modified'        => array(
                    'description' => __( "The date the object was last modified, in the site's timezone." ),
                    'type'        => 'string',
                    'format'      => 'date-time',
                    'context'     => array( 'view', 'edit' ),
                    'readonly'    => true,
                ),
                'modified_gmt'    => array(
                    'description' => __( 'The date the object was last modified, as GMT.' ),
                    'type'        => 'string',
                    'format'      => 'date-time',
                    'context'     => array( 'view', 'edit' ),
                    'readonly'    => true,
                ),
                'slug'            => array(
                    'description' => __( 'An alphanumeric identifier for the object unique to its type.' ),
                    'type'        => 'string',
                    'context'     => array( 'view', 'edit', 'embed' ),
                    'arg_options' => array(
                        'sanitize_callback' => array( $this, 'sanitize_slug' ),
                    ),
                ),
                'status'          => array(
                    'description' => __( 'A named status for the object.' ),
                    'type'        => 'string',
                    'enum'        => array_keys( get_post_stati( array( 'internal' => false ) ) ),
                    'context'     => array( 'view', 'edit' ),
                ),
                'type'            => array(
                    'description' => __( 'Type of Post for the object.' ),
                    'type'        => 'string',
                    'context'     => array( 'view', 'edit', 'embed' ),
                    'readonly'    => true,
                ),
                'password'        => array(
                    'description' => __( 'A password to protect access to the content and excerpt.' ),
                    'type'        => 'string',
                    'context'     => array( 'edit' ),
                ),
            ),
        );

        $post_type_obj = get_post_type_object( $this->post_type );

        if ( $post_type_obj->hierarchical ) {
            $schema['properties']['parent'] = array(
                'description' => __( 'The ID for the parent of the object.' ),
                'type'        => 'integer',
                'context'     => array( 'view', 'edit' ),
            );
        }

        $post_type_attributes = array(
            'title',
            'editor',
            'author',
            'excerpt',
            'thumbnail',
            'comments',
            'revisions',
            'page-attributes',
            'post-formats',
            'custom-fields',
        );
        $fixed_schemas = array(
            'post' => array(
                'title',
                'editor',
                'author',
                'excerpt',
                'thumbnail',
                'comments',
                'revisions',
                'post-formats',
                'custom-fields',
            ),
            'page' => array(
                'title',
                'editor',
                'author',
                'excerpt',
                'thumbnail',
                'comments',
                'revisions',
                'page-attributes',
                'custom-fields',
            ),
            'attachment' => array(
                'title',
                'author',
                'comments',
                'revisions',
                'custom-fields',
            ),
        );
        foreach ( $post_type_attributes as $attribute ) {
            if ( isset( $fixed_schemas[ $this->post_type ] ) && ! in_array( $attribute, $fixed_schemas[ $this->post_type ], true ) ) {
                continue;
            } elseif ( ! isset( $fixed_schemas[ $this->post_type ] ) && ! post_type_supports( $this->post_type, $attribute ) ) {
                continue;
            }

            switch ( $attribute ) {

                case 'title':
                    $schema['properties']['title'] = array(
                        'description' => __( 'The title for the object.' ),
                        'type'        => 'object',
                        'context'     => array( 'view', 'edit', 'embed' ),
                        'arg_options' => array(
                            'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database()
                            'validate_callback' => null, // Note: validation implemented in self::prepare_item_for_database()
                        ),
                        '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,
                            ),
                        ),
                    );
                    break;

                case 'editor':
                    $schema['properties']['content'] = array(
                        'description' => __( 'The content for the object.' ),
                        'type'        => 'object',
                        'context'     => array( 'view', 'edit' ),
                        'arg_options' => array(
                            'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database()
                            'validate_callback' => null, // Note: validation implemented in self::prepare_item_for_database()
                        ),
                        'properties'  => array(
                            'raw' => array(
                                'description' => __( 'Content for the object, as it exists in the database.' ),
                                'type'        => 'string',
                                'context'     => array( 'edit' ),
                            ),
                            'rendered' => array(
                                'description' => __( 'HTML content for the object, transformed for display.' ),
                                'type'        => 'string',
                                'context'     => array( 'view', 'edit' ),
                                'readonly'    => true,
                            ),
                            'protected'       => array(
                                'description' => __( 'Whether the content is protected with a password.' ),
                                'type'        => 'boolean',
                                'context'     => array( 'view', 'edit', 'embed' ),
                                'readonly'    => true,
                            ),
                        ),
                    );
                    break;

                case 'author':
                    $schema['properties']['author'] = array(
                        'description' => __( 'The ID for the author of the object.' ),
                        'type'        => 'integer',
                        'context'     => array( 'view', 'edit', 'embed' ),
                    );
                    break;

                case 'excerpt':
                    $schema['properties']['excerpt'] = array(
                        'description' => __( 'The excerpt for the object.' ),
                        'type'        => 'object',
                        'context'     => array( 'view', 'edit', 'embed' ),
                        'arg_options' => array(
                            'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database()
                            'validate_callback' => null, // Note: validation implemented in self::prepare_item_for_database()
                        ),
                        'properties'  => array(
                            'raw' => array(
                                'description' => __( 'Excerpt for the object, as it exists in the database.' ),
                                'type'        => 'string',
                                'context'     => array( 'edit' ),
                            ),
                            'rendered' => array(
                                'description' => __( 'HTML excerpt for the object, transformed for display.' ),
                                'type'        => 'string',
                                'context'     => array( 'view', 'edit', 'embed' ),
                                'readonly'    => true,
                            ),
                            'protected'       => array(
                                'description' => __( 'Whether the excerpt is protected with a password.' ),
                                'type'        => 'boolean',
                                'context'     => array( 'view', 'edit', 'embed' ),
                                'readonly'    => true,
                            ),
                        ),
                    );
                    break;

                case 'thumbnail':
                    $schema['properties']['featured_media'] = array(
                        'description' => __( 'The ID of the featured media for the object.' ),
                        'type'        => 'integer',
                        'context'     => array( 'view', 'edit', 'embed' ),
                    );
                    break;

                case 'comments':
                    $schema['properties']['comment_status'] = array(
                        'description' => __( 'Whether or not comments are open on the object.' ),
                        'type'        => 'string',
                        'enum'        => array( 'open', 'closed' ),
                        'context'     => array( 'view', 'edit' ),
                    );
                    $schema['properties']['ping_status'] = array(
                        'description' => __( 'Whether or not the object can be pinged.' ),
                        'type'        => 'string',
                        'enum'        => array( 'open', 'closed' ),
                        'context'     => array( 'view', 'edit' ),
                    );
                    break;

                case 'page-attributes':
                    $schema['properties']['menu_order'] = array(
                        'description' => __( 'The order of the object in relation to other object of its type.' ),
                        'type'        => 'integer',
                        'context'     => array( 'view', 'edit' ),
                    );
                    break;

                case 'post-formats':
                    // Get the native post formats and remove the array keys.
                    $formats = array_values( get_post_format_slugs() );

                    $schema['properties']['format'] = array(
                        'description' => __( 'The format for the object.' ),
                        'type'        => 'string',
                        'enum'        => $formats,
                        'context'     => array( 'view', 'edit' ),
                    );
                    break;

                case 'custom-fields':
                    $schema['properties']['meta'] = $this->meta->get_field_schema();
                    break;

            }
        }

        if ( 'post' === $this->post_type ) {
            $schema['properties']['sticky'] = array(
                'description' => __( 'Whether or not the object should be treated as sticky.' ),
                'type'        => 'boolean',
                'context'     => array( 'view', 'edit' ),
            );
        }

        $schema['properties']['template'] = array(
            'description' => __( 'The theme file to use to display the object.' ),
            'type'        => 'string',
            'context'     => array( 'view', 'edit' ),
            'arg_options' => array(
                'validate_callback' => array( $this, 'check_template' ),
            ),
        );

        $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' ),
            );
        }

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

    /**
     * Retrieves the query params for the posts collection.
     *
     * @since 4.7.0
     *
     * @return array Collection parameters.
     */
    public function get_collection_params() {
        $query_params = parent::get_collection_params();

        $query_params['context']['default'] = 'view';

        $query_params['after'] = array(
            'description'        => __( 'Limit response to posts published after a given ISO8601 compliant date.' ),
            'type'               => 'string',
            'format'             => 'date-time',
        );

        if ( post_type_supports( $this->post_type, 'author' ) ) {
            $query_params['author'] = array(
                'description'         => __( 'Limit result set to posts assigned to specific authors.' ),
                'type'                => 'array',
                'items'               => array(
                    'type'            => 'integer',
                ),
                'default'             => array(),
            );
            $query_params['author_exclude'] = array(
                'description'         => __( 'Ensure result set excludes posts assigned to specific authors.' ),
                'type'                => 'array',
                'items'               => array(
                    'type'            => 'integer',
                ),
                'default'             => array(),
            );
        }

        $query_params['before'] = array(
            'description'        => __( 'Limit response to posts published before a given ISO8601 compliant date.' ),
            'type'               => 'string',
            'format'             => 'date-time',
        );

        $query_params['exclude'] = array(
            'description'        => __( 'Ensure result set excludes specific IDs.' ),
            'type'               => 'array',
            'items'              => array(
                'type'           => 'integer',
            ),
            'default'            => array(),
        );

        $query_params['include'] = array(
            'description'        => __( 'Limit result set to specific IDs.' ),
            'type'               => 'array',
            'items'              => array(
                'type'           => 'integer',
            ),
            'default'            => array(),
        );

        if ( 'page' === $this->post_type || post_type_supports( $this->post_type, 'page-attributes' ) ) {
            $query_params['menu_order'] = array(
                'description'        => __( 'Limit result set to posts with a specific menu_order value.' ),
                'type'               => 'integer',
            );
        }

        $query_params['offset'] = array(
            'description'        => __( 'Offset the result set by a specific number of items.' ),
            'type'               => 'integer',
        );

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

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

        if ( 'page' === $this->post_type || post_type_supports( $this->post_type, 'page-attributes' ) ) {
            $query_params['orderby']['enum'][] = 'menu_order';
        }

        $post_type = get_post_type_object( $this->post_type );

        if ( $post_type->hierarchical || 'attachment' === $this->post_type ) {
            $query_params['parent'] = array(
                'description'       => __( 'Limit result set to items with particular parent IDs.' ),
                'type'              => 'array',
                'items'             => array(
                    'type'          => 'integer',
                ),
                'default'           => array(),
            );
            $query_params['parent_exclude'] = array(
                'description'       => __( 'Limit result set to all items except those of a particular parent ID.' ),
                'type'              => 'array',
                'items'             => array(
                    'type'          => 'integer',
                ),
                'default'           => array(),
            );
        }

        $query_params['slug'] = array(
            'description'       => __( 'Limit result set to posts with one or more specific slugs.' ),
            'type'              => 'array',
            'items'             => array(
                'type'          => 'string',
            ),
            'sanitize_callback' => 'wp_parse_slug_list',
        );

        $query_params['status'] = array(
            'default'           => 'publish',
            'description'       => __( 'Limit result set to posts assigned one or more statuses.' ),
            'type'              => 'array',
            'items'             => array(
                'enum'          => array_merge( array_keys( get_post_stati() ), array( 'any' ) ),
                'type'          => 'string',
            ),
            'sanitize_callback' => array( $this, 'sanitize_post_statuses' ),
        );

        $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;

            $query_params[ $base ] = array(
                /* translators: %s: taxonomy name */
                'description'       => sprintf( __( 'Limit result set to all items that have the specified term assigned in the %s taxonomy.' ), $base ),
                'type'              => 'array',
                'items'             => array(
                    'type'          => 'integer',
                ),
                'default'           => array(),
            );

            $query_params[ $base . '_exclude' ] = array(
                /* translators: %s: taxonomy name */
                'description' => sprintf( __( 'Limit result set to all items except those that have the specified term assigned in the %s taxonomy.' ), $base ),
                'type'        => 'array',
                'items'       => array(
                    'type'    => 'integer',
                ),
                'default'           => array(),
            );
        }

        if ( 'post' === $this->post_type ) {
            $query_params['sticky'] = array(
                'description'       => __( 'Limit result set to items that are sticky.' ),
                'type'              => 'boolean',
            );
        }

        /**
         * Filter collection parameters for the posts controller.
         *
         * The dynamic part of the filter `$this->post_type` refers to the post
         * type slug for the controller.
         *
         * This filter registers the collection parameter, but does not map the
         * collection parameter to an internal WP_Query parameter. Use the
         * `rest_{$this->post_type}_query` filter to set WP_Query parameters.
         *
         * @since 4.7.0
         *
         * @param array        $query_params JSON Schema-formatted collection parameters.
         * @param WP_Post_Type $post_type    Post type object.
         */
        return apply_filters( "rest_{$this->post_type}_collection_params", $query_params, $post_type );
    }

    /**
     * Sanitizes and validates the list of post statuses, including whether the
     * user can query private statuses.
     *
     * @since 4.7.0
     *
     * @param  string|array    $statuses  One or more post statuses.
     * @param  WP_REST_Request $request   Full details about the request.
     * @param  string          $parameter Additional parameter to pass to validation.
     * @return array|WP_Error A list of valid statuses, otherwise WP_Error object.
     */
    public function sanitize_post_statuses( $statuses, $request, $parameter ) {
        $statuses = wp_parse_slug_list( $statuses );

        // The default status is different in WP_REST_Attachments_Controller
        $attributes = $request->get_attributes();
        $default_status = $attributes['args']['status']['default'];

        foreach ( $statuses as $status ) {
            if ( $status === $default_status ) {
                continue;
            }

            $post_type_obj = get_post_type_object( $this->post_type );

            if ( current_user_can( $post_type_obj->cap->edit_posts ) ) {
                $result = rest_validate_request_arg( $status, $request, $parameter );
                if ( is_wp_error( $result ) ) {
                    return $result;
                }
            } else {
                return new WP_Error( 'rest_forbidden_status', __( 'Status is forbidden.' ), array( 'status' => rest_authorization_required_code() ) );
            }
        }

        return $statuses;
    }
}