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class-wp-rest-attachmen...	23.013KB	edt ren
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class-wp-rest-revisions...	16.642KB	edt ren
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<?php
/**
 * REST API: WP_REST_Revisions_Controller class
 *
 * @package WordPress
 * @subpackage REST_API
 * @since 4.7.0
 */

/**
 * Core class used to access revisions via the REST API.
 *
 * @since 4.7.0
 *
 * @see WP_REST_Controller
 */
class WP_REST_Revisions_Controller extends WP_REST_Controller {

/**
	 * Parent post type.
	 *
	 * @since 4.7.0
	 * @var string
	 */
	private $parent_post_type;

/**
	 * Parent controller.
	 *
	 * @since 4.7.0
	 * @var WP_REST_Controller
	 */
	private $parent_controller;

/**
	 * The base of the parent controller's route.
	 *
	 * @since 4.7.0
	 * @var string
	 */
	private $parent_base;

/**
	 * Constructor.
	 *
	 * @since 4.7.0
	 *
	 * @param string $parent_post_type Post type of the parent.
	 */
	public function __construct( $parent_post_type ) {
		$this->parent_post_type = $parent_post_type;
		$this->parent_controller = new WP_REST_Posts_Controller( $parent_post_type );
		$this->namespace = 'wp/v2';
		$this->rest_base = 'revisions';
		$post_type_object = get_post_type_object( $parent_post_type );
		$this->parent_base = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;
	}

/**
	 * Registers routes for revisions based on post types supporting revisions.
	 *
	 * @since 4.7.0
	 *
	 * @see register_rest_route()
	 */
	public function register_routes() {

register_rest_route( $this->namespace, '/' . $this->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base, array(
			'args' => array(
				'parent' => array(
					'description' => __( 'The ID for the parent of the object.' ),
					'type'        => 'integer',
				),
			),
			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->parent_base . '/(?P<parent>[\d]+)/' . $this->rest_base . '/(?P<id>[\d]+)', array(
			'args' => array(
				'parent' => array(
					'description' => __( 'The ID for the parent of the object.' ),
					'type'        => 'integer',
				),
				'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'                => array(
					'context' => $this->get_context_param( array( 'default' => 'view' ) ),
				),
			),
			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' => __( 'Required to be true, as revisions do not support trashing.' ),
					),
				),
			),
			'schema' => array( $this, 'get_public_item_schema' ),
		));

}

/**
	 * Get the parent 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_parent( $parent ) {
		$error = new WP_Error( 'rest_post_invalid_parent', __( 'Invalid post parent ID.' ), array( 'status' => 404 ) );
		if ( (int) $parent <= 0 ) {
			return $error;
		}

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

return $parent;
	}

/**
	 * Checks if a given request has access to get revisions.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Full data 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 ) {
		$parent = $this->get_parent( $request['parent'] );
		if ( is_wp_error( $parent ) ) {
			return $parent;
		}

$parent_post_type_obj = get_post_type_object( $parent->post_type );
		if ( ! current_user_can( $parent_post_type_obj->cap->edit_post, $parent->ID ) ) {
			return new WP_Error( 'rest_cannot_read', __( 'Sorry, you are not allowed to view revisions of this post.' ), array( 'status' => rest_authorization_required_code() ) );
		}

return true;
	}

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

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

return $revision;
	}

/**
	 * Gets a collection of revisions.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Full data about the request.
	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
	 */
	public function get_items( $request ) {
		$parent = $this->get_parent( $request['parent'] );
		if ( is_wp_error( $parent ) ) {
			return $parent;
		}

$revisions = wp_get_post_revisions( $request['parent'] );

$response = array();
		foreach ( $revisions as $revision ) {
			$data = $this->prepare_item_for_response( $revision, $request );
			$response[] = $this->prepare_response_for_collection( $data );
		}
		return rest_ensure_response( $response );
	}

/**
	 * Checks if a given request has access to get a specific revision.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Full data 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 ) {
		return $this->get_items_permissions_check( $request );
	}

/**
	 * Retrieves one revision from the collection.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Full data about the request.
	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
	 */
	public function get_item( $request ) {
		$parent = $this->get_parent( $request['parent'] );
		if ( is_wp_error( $parent ) ) {
			return $parent;
		}

$revision = $this->get_revision( $request['id'] );
		if ( is_wp_error( $revision ) ) {
			return $revision;
		}

$response = $this->prepare_item_for_response( $revision, $request );
		return rest_ensure_response( $response );
	}

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

$revision = $this->get_revision( $request['id'] );
		if ( is_wp_error( $revision ) ) {
			return $revision;
		}

$response = $this->get_items_permissions_check( $request );
		if ( ! $response || is_wp_error( $response ) ) {
			return $response;
		}

$post_type = get_post_type_object( 'revision' );
		return current_user_can( $post_type->cap->delete_post, $revision->ID );
	}

/**
	 * Deletes a single revision.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return true|WP_Error True on success, or WP_Error object on failure.
	 */
	public function delete_item( $request ) {
		$revision = $this->get_revision( $request['id'] );
		if ( is_wp_error( $revision ) ) {
			return $revision;
		}

$force = isset( $request['force'] ) ? (bool) $request['force'] : false;

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

$previous = $this->prepare_item_for_response( $revision, $request );

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

/**
		 * Fires after a revision is deleted via the REST API.
		 *
		 * @since 4.7.0
		 *
		 * @param (mixed) $result The revision object (if it was deleted or moved to the trash successfully)
		 *                        or false (failure). If the revision was moved to the trash, $result represents
		 *                        its new state; if it was deleted, $result represents its state before deletion.
		 * @param WP_REST_Request $request The request sent to the API.
		 */
		do_action( 'rest_delete_revision', $result, $request );

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

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

/**
	 * Prepares the revision for the REST response.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_Post         $post    Post revision 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();

$data = array();

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

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

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

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

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

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

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

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

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

if ( ! empty( $schema['properties']['content'] ) ) {

$data['content'] = array(
				'raw'      => $post->post_content,
				/** This filter is documented in wp-includes/post-template.php */
				'rendered' => apply_filters( 'the_content', $post->post_content ),
			);
		}

if ( ! empty( $schema['properties']['excerpt'] ) ) {
			$data['excerpt'] = array(
				'raw'      => $post->post_excerpt,
				'rendered' => $this->prepare_excerpt_response( $post->post_excerpt, $post ),
			);
		}

$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 ( ! empty( $data['parent'] ) ) {
			$response->add_link( 'parent', rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->parent_base, $data['parent'] ) ) );
		}

/**
		 * Filters a revision returned from the API.
		 *
		 * Allows modification of the revision right before it is returned.
		 *
		 * @since 4.7.0
		 *
		 * @param WP_REST_Response $response The response object.
		 * @param WP_Post          $post     The original revision object.
		 * @param WP_REST_Request  $request  Request used to generate the response.
		 */
		return apply_filters( 'rest_prepare_revision', $response, $post, $request );
	}

/**
	 * 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, otherwise null.
	 */
	protected function prepare_date_response( $date_gmt, $date = null ) {
		if ( '0000-00-00 00:00:00' === $date_gmt ) {
			return null;
		}

if ( isset( $date ) ) {
			return mysql_to_rfc3339( $date );
		}

return mysql_to_rfc3339( $date_gmt );
	}

/**
	 * Retrieves the revision'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->parent_post_type}-revision",
			'type'       => 'object',
			// Base properties for every Revision.
			'properties' => array(
				'author'          => array(
					'description' => __( 'The ID for the author of the object.' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit', 'embed' ),
				),
				'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' => __( 'GUID for the object, as it exists in the database.' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
				),
				'id'              => array(
					'description' => __( 'Unique identifier for the object.' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit', 'embed' ),
				),
				'modified'        => array(
					'description' => __( "The date the object was last modified, in the site's timezone." ),
					'type'        => 'string',
					'format'      => 'date-time',
					'context'     => array( 'view', 'edit' ),
				),
				'modified_gmt'    => array(
					'description' => __( 'The date the object was last modified, as GMT.' ),
					'type'        => 'string',
					'format'      => 'date-time',
					'context'     => array( 'view', 'edit' ),
				),
				'parent'          => array(
					'description' => __( 'The ID for the parent of the object.' ),
					'type'        => 'integer',
					'context'     => array( 'view', 'edit', 'embed' ),
					),
				'slug'            => array(
					'description' => __( 'An alphanumeric identifier for the object unique to its type.' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit', 'embed' ),
				),
			),
		);

$parent_schema = $this->parent_controller->get_item_schema();

if ( ! empty( $parent_schema['properties']['title'] ) ) {
			$schema['properties']['title'] = $parent_schema['properties']['title'];
		}

if ( ! empty( $parent_schema['properties']['content'] ) ) {
			$schema['properties']['content'] = $parent_schema['properties']['content'];
		}

if ( ! empty( $parent_schema['properties']['excerpt'] ) ) {
			$schema['properties']['excerpt'] = $parent_schema['properties']['excerpt'];
		}

if ( ! empty( $parent_schema['properties']['guid'] ) ) {
			$schema['properties']['guid'] = $parent_schema['properties']['guid'];
		}

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

/**
	 * Retrieves the query params for collections.
	 *
	 * @since 4.7.0
	 *
	 * @return array Collection parameters.
	 */
	public function get_collection_params() {
		return array(
			'context' => $this->get_context_param( array( 'default' => 'view' ) ),
		);
	}

/**
	 * Checks the post excerpt and prepare it for single post output.
	 *
	 * @since 4.7.0
	 *
	 * @param string  $excerpt The post excerpt.
	 * @param WP_Post $post    Post revision object.
	 * @return string Prepared excerpt or empty string.
	 */
	protected function prepare_excerpt_response( $excerpt, $post ) {

/** This filter is documented in wp-includes/post-template.php */
		$excerpt = apply_filters( 'the_excerpt', $excerpt, $post );

if ( empty( $excerpt ) ) {
			return '';
		}

return $excerpt;
	}
}

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