class-wp-rest-posts-controller.php

<?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;

	/**
	 * Passwordless post access permitted.
	 *
	 * @since 5.7.1
	 * @var int[]
	 */
	protected $password_check_passed = array();

	/**
	 * 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 posts.
	 *
	 * @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 post.' ),
						'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;
	}

	/**
	 * Override the result of the post password check for REST requested posts.
	 *
	 * Allow users to read the content of password protected posts if they have
	 * previously passed a permission check or if they have the `edit_post` capability
	 * for the post being checked.
	 *
	 * @since 5.7.1
	 *
	 * @param bool    $required Whether the post requires a password check.
	 * @param WP_Post $post     The post been password checked.
	 * @return bool Result of password check taking in to account REST API considerations.
	 */
	public function check_password_required( $required, $post ) {
		if ( ! $required ) {
			return $required;
		}

		$post = get_post( $post );

		if ( ! $post ) {
			return $required;
		}

		if ( ! empty( $this->password_check_passed[ $post->ID ] ) ) {
			// Password previously checked and approved.
			return false;
		}

		return ! current_user_can( 'edit_post', $post->ID );
	}

	/**
	 * 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();

		if ( isset( $registered['before'], $request['before'] ) ) {
			$args['date_query'][] = array(
				'before' => $request['before'],
				'column' => 'post_date',
			);
		}

		if ( isset( $registered['modified_before'], $request['modified_before'] ) ) {
			$args['date_query'][] = array(
				'before' => $request['modified_before'],
				'column' => 'post_modified',
			);
		}

		if ( isset( $registered['after'], $request['after'] ) ) {
			$args['date_query'][] = array(
				'after'  => $request['after'],
				'column' => 'post_date',
			);
		}

		if ( isset( $registered['modified_after'], $request['modified_after'] ) ) {
			$args['date_query'][] = array(
				'after'  => $request['modified_after'],
				'column' => 'post_modified',
			);
		}

		// 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 );
			}
		}

		$args = $this->prepare_tax_query( $args, $request );

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

		/**
		 * Filters WP_Query arguments when querying posts via the REST API.
		 *
		 * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
		 *
		 * Possible hook names include:
		 *
		 *  - `rest_post_query`
		 *  - `rest_page_query`
		 *  - `rest_attachment_query`
		 *
		 * Enables adding extra arguments or setting defaults for a post collection request.
		 *
		 * @since 4.7.0
		 * @since 5.7.0 Moved after the `tax_query` query arg is generated.
		 *
		 * @link https://developer.wordpress.org/reference/classes/wp_query/
		 *
		 * @param array           $args    Array of arguments for WP_Query.
		 * @param WP_REST_Request $request The REST API request.
		 */
		$args       = apply_filters( "rest_{$this->post_type}_query", $args, $request );
		$query_args = $this->prepare_items_query( $args, $request );

		$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', array( $this, 'check_password_required' ), 10, 2 );
		}

		$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', array( $this, 'check_password_required' ) );
		}

		$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( urlencode_deep( $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 true|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', array( $this, 'check_password_required' ), 10, 2 );
		}

		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;
		}

		/*
		 * Users always gets access to password protected content in the edit
		 * context if they have the `edit_post` meta capability.
		 */
		if (
			'edit' === $request['context'] &&
			current_user_can( 'edit_post', $post->ID )
		) {
			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 ) && ! current_user_can( $post_type->cap->publish_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, false );

		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.
		 *
		 * Possible hook names include:
		 *
		 *  - `rest_insert_post`
		 *  - `rest_insert_page`
		 *  - `rest_insert_attachment`
		 *
		 * @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' );

		/**
		 * Fires after a single post is completely created or updated via the REST API.
		 *
		 * The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.
		 *
		 * Possible hook names include:
		 *
		 *  - `rest_after_insert_post`
		 *  - `rest_after_insert_page`
		 *  - `rest_after_insert_attachment`
		 *
		 * @since 5.0.0
		 *
		 * @param WP_Post         $post     Inserted or updated post object.
		 * @param WP_REST_Request $request  Request object.
		 * @param bool            $creating True when creating a post, false when updating.
		 */
		do_action( "rest_after_insert_{$this->post_type}", $post, $request, true );

		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, $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 ) && ! current_user_can( $post_type->cap->publish_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_before = get_post( $request['id'] );
		$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, false );

		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' );

		// Filter is fired in WP_REST_Attachments_Controller subclass.
		if ( 'attachment' === $this->post_type ) {
			$response = $this->prepare_item_for_response( $post, $request );
			return rest_ensure_response( $response );
		}

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

		wp_after_insert_post( $post, true, $post_before );

		$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.
		 *
		 * Possible hook names include:
		 *
		 *  - `rest_post_trashable`
		 *  - `rest_page_trashable`
		 *  - `rest_attachment_trashable`
		 *
		 * 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 ) {
				return new WP_Error(
					'rest_trash_not_supported',
					/* translators: %s: force=true */
					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(