--- /dev/null
+<?php
+/**
+ * REST API: WP_REST_Post_Statuses_Controller class
+ *
+ * @package WordPress
+ * @subpackage REST_API
+ * @since 4.7.0
+ */
+
+/**
+ * Core class used to access post statuses via the REST API.
+ *
+ * @since 4.7.0
+ *
+ * @see WP_REST_Controller
+ */
+class WP_REST_Post_Statuses_Controller extends WP_REST_Controller {
+
+ /**
+ * Constructor.
+ *
+ * @since 4.7.0
+ * @access public
+ */
+ public function __construct() {
+ $this->namespace = 'wp/v2';
+ $this->rest_base = 'statuses';
+ }
+
+ /**
+ * Registers the routes for the objects of the controller.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @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(),
+ ),
+ 'schema' => array( $this, 'get_public_item_schema' ),
+ ) );
+
+ register_rest_route( $this->namespace, '/' . $this->rest_base . '/(?P<status>[\w-]+)', array(
+ array(
+ 'methods' => WP_REST_Server::READABLE,
+ 'callback' => array( $this, 'get_item' ),
+ 'permission_callback' => array( $this, 'get_item_permissions_check' ),
+ 'args' => array(
+ 'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+ ),
+ ),
+ 'schema' => array( $this, 'get_public_item_schema' ),
+ ) );
+ }
+
+ /**
+ * Checks whether a given request has permission to read post statuses.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param WP_REST_Request $request Full details about the request.
+ * @return WP_Error|bool True if the request has read access, WP_Error object otherwise.
+ */
+ public function get_items_permissions_check( $request ) {
+ if ( 'edit' === $request['context'] ) {
+ $types = get_post_types( array( 'show_in_rest' => true ), 'objects' );
+
+ foreach ( $types as $type ) {
+ if ( current_user_can( $type->cap->edit_posts ) ) {
+ return true;
+ }
+ }
+ return new WP_Error( 'rest_cannot_view', __( 'Sorry, you are not allowed to edit posts in this post type.' ), array( 'status' => rest_authorization_required_code() ) );
+ }
+
+ return true;
+ }
+
+ /**
+ * Retrieves all post statuses, depending on user context.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param WP_REST_Request $request Full details about the request.
+ * @return WP_Error|WP_REST_Response Response object on success, or WP_Error object on failure.
+ */
+ public function get_items( $request ) {
+ $data = array();
+ $statuses = get_post_stati( array( 'internal' => false ), 'object' );
+ $statuses['trash'] = get_post_status_object( 'trash' );
+
+ foreach ( $statuses as $slug => $obj ) {
+ $ret = $this->check_read_permission( $obj );
+
+ if ( ! $ret ) {
+ continue;
+ }
+
+ $status = $this->prepare_item_for_response( $obj, $request );
+ $data[ $obj->name ] = $this->prepare_response_for_collection( $status );
+ }
+
+ return rest_ensure_response( $data );
+ }
+
+ /**
+ * Checks if a given request has access to read a post status.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param WP_REST_Request $request Full details about the request.
+ * @return WP_Error|bool True if the request has read access for the item, WP_Error object otherwise.
+ */
+ public function get_item_permissions_check( $request ) {
+ $status = get_post_status_object( $request['status'] );
+
+ if ( empty( $status ) ) {
+ return new WP_Error( 'rest_status_invalid', __( 'Invalid status.' ), array( 'status' => 404 ) );
+ }
+
+ $check = $this->check_read_permission( $status );
+
+ if ( ! $check ) {
+ return new WP_Error( 'rest_cannot_read_status', __( 'Cannot view status.' ), array( 'status' => rest_authorization_required_code() ) );
+ }
+
+ return true;
+ }
+
+ /**
+ * Checks whether a given post status should be visible.
+ *
+ * @since 4.7.0
+ * @access protected
+ *
+ * @param object $status Post status.
+ * @return bool True if the post status is visible, otherwise false.
+ */
+ protected function check_read_permission( $status ) {
+ if ( true === $status->public ) {
+ return true;
+ }
+
+ if ( false === $status->internal || 'trash' === $status->name ) {
+ $types = get_post_types( array( 'show_in_rest' => true ), 'objects' );
+
+ foreach ( $types as $type ) {
+ if ( current_user_can( $type->cap->edit_posts ) ) {
+ return true;
+ }
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Retrieves a specific post status.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param WP_REST_Request $request Full details about the request.
+ * @return WP_Error|WP_REST_Response Response object on success, or WP_Error object on failure.
+ */
+ public function get_item( $request ) {
+ $obj = get_post_status_object( $request['status'] );
+
+ if ( empty( $obj ) ) {
+ return new WP_Error( 'rest_status_invalid', __( 'Invalid status.' ), array( 'status' => 404 ) );
+ }
+
+ $data = $this->prepare_item_for_response( $obj, $request );
+
+ return rest_ensure_response( $data );
+ }
+
+ /**
+ * Prepares a post status object for serialization.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @param stdClass $status Post status data.
+ * @param WP_REST_Request $request Full details about the request.
+ * @return WP_REST_Response Post status data.
+ */
+ public function prepare_item_for_response( $status, $request ) {
+
+ $data = array(
+ 'name' => $status->label,
+ 'private' => (bool) $status->private,
+ 'protected' => (bool) $status->protected,
+ 'public' => (bool) $status->public,
+ 'queryable' => (bool) $status->publicly_queryable,
+ 'show_in_list' => (bool) $status->show_in_admin_all_list,
+ 'slug' => $status->name,
+ );
+
+ $context = ! empty( $request['context'] ) ? $request['context'] : 'view';
+ $data = $this->add_additional_fields_to_object( $data, $request );
+ $data = $this->filter_response_by_context( $data, $context );
+
+ $response = rest_ensure_response( $data );
+
+ if ( 'publish' === $status->name ) {
+ $response->add_link( 'archives', rest_url( 'wp/v2/posts' ) );
+ } else {
+ $response->add_link( 'archives', add_query_arg( 'status', $status->name, rest_url( 'wp/v2/posts' ) ) );
+ }
+
+ /**
+ * Filters a status returned from the REST API.
+ *
+ * Allows modification of the status data right before it is returned.
+ *
+ * @since 4.7.0
+ *
+ * @param WP_REST_Response $response The response object.
+ * @param object $status The original status object.
+ * @param WP_REST_Request $request Request used to generate the response.
+ */
+ return apply_filters( 'rest_prepare_status', $response, $status, $request );
+ }
+
+ /**
+ * Retrieves the post status' schema, conforming to JSON Schema.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @return array Item schema data.
+ */
+ public function get_item_schema() {
+ $schema = array(
+ '$schema' => 'http://json-schema.org/schema#',
+ 'title' => 'status',
+ 'type' => 'object',
+ 'properties' => array(
+ 'name' => array(
+ 'description' => __( 'The title for the status.' ),
+ 'type' => 'string',
+ 'context' => array( 'embed', 'view', 'edit' ),
+ 'readonly' => true,
+ ),
+ 'private' => array(
+ 'description' => __( 'Whether posts with this status should be private.' ),
+ 'type' => 'boolean',
+ 'context' => array( 'edit' ),
+ 'readonly' => true,
+ ),
+ 'protected' => array(
+ 'description' => __( 'Whether posts with this status should be protected.' ),
+ 'type' => 'boolean',
+ 'context' => array( 'edit' ),
+ 'readonly' => true,
+ ),
+ 'public' => array(
+ 'description' => __( 'Whether posts of this status should be shown in the front end of the site.' ),
+ 'type' => 'boolean',
+ 'context' => array( 'view', 'edit' ),
+ 'readonly' => true,
+ ),
+ 'queryable' => array(
+ 'description' => __( 'Whether posts with this status should be publicly-queryable.' ),
+ 'type' => 'boolean',
+ 'context' => array( 'view', 'edit' ),
+ 'readonly' => true,
+ ),
+ 'show_in_list' => array(
+ 'description' => __( 'Whether to include posts in the edit listing for their post type.' ),
+ 'type' => 'boolean',
+ 'context' => array( 'edit' ),
+ 'readonly' => true,
+ ),
+ 'slug' => array(
+ 'description' => __( 'An alphanumeric identifier for the status.' ),
+ 'type' => 'string',
+ 'context' => array( 'embed', 'view', 'edit' ),
+ 'readonly' => true,
+ ),
+ ),
+ );
+
+ return $this->add_additional_fields_schema( $schema );
+ }
+
+ /**
+ * Retrieves the query params for collections.
+ *
+ * @since 4.7.0
+ * @access public
+ *
+ * @return array Collection parameters.
+ */
+ public function get_collection_params() {
+ return array(
+ 'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+ );
+ }
+
+}
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