/**
 * Class for working with MO files
 *
 * @version $Id: mo.php 1157 2015-11-20 04:30:11Z dd32 $
 * @package pomo
 * @subpackage mo
 */

require_once dirname(__FILE__) . '/translations.php';
require_once dirname(__FILE__) . '/streams.php';

if ( ! class_exists( 'MO', false ) ):
class MO extends Gettext_Translations {

	var $_nplurals = 2;

	/**
	 * Loaded MO file.
	 *
	 * @var string
	 */
	private $filename = '';

	/**
	 * Returns the loaded MO file.
	 *
	 * @return string The loaded MO file.
	 */
	public function get_filename() {
		return $this->filename;
	}

	/**
	 * Fills up with the entries from MO file $filename
	 *
	 * @param string $filename MO file to load
	 */
	function import_from_file($filename) {
		$reader = new POMO_FileReader( $filename );

		if ( ! $reader->is_resource() ) {
			return false;
		}

		$this->filename = (string) $filename;

		return $this->import_from_reader( $reader );
	}

	/**
	 * @param string $filename
	 * @return bool
	 */
	function export_to_file($filename) {
		$fh = fopen($filename, 'wb');
		if ( !$fh ) return false;
		$res = $this->export_to_file_handle( $fh );
		fclose($fh);
		return $res;
	}

	/**
	 * @return string|false
	 */
	function export() {
		$tmp_fh = fopen("php://temp", 'r+');
		if ( !$tmp_fh ) return false;
		$this->export_to_file_handle( $tmp_fh );
		rewind( $tmp_fh );
		return stream_get_contents( $tmp_fh );
	}

	/**
	 * @param Translation_Entry $entry
	 * @return bool
	 */
	function is_entry_good_for_export( $entry ) {
		if ( empty( $entry->translations ) ) {
			return false;
		}

		if ( !array_filter( $entry->translations ) ) {
			return false;
		}

		return true;
	}

	/**
	 * @param resource $fh
	 * @return true
	 */
	function export_to_file_handle($fh) {
		$entries = array_filter( $this->entries, array( $this, 'is_entry_good_for_export' ) );
		ksort($entries);
		$magic = 0x950412de;
		$revision = 0;
		$total = count($entries) + 1; // all the headers are one entry
		$originals_lenghts_addr = 28;
		$translations_lenghts_addr = $originals_lenghts_addr + 8 * $total;
		$size_of_hash = 0;
		$hash_addr = $translations_lenghts_addr + 8 * $total;
		$current_addr = $hash_addr;
		fwrite($fh, pack('V*', $magic, $revision, $total, $originals_lenghts_addr,
			$translations_lenghts_addr, $size_of_hash, $hash_addr));
		fseek($fh, $originals_lenghts_addr);

		// headers' msgid is an empty string
		fwrite($fh, pack('VV', 0, $current_addr));
		$current_addr++;
		$originals_table = chr(0);

		$reader = new POMO_Reader();

		foreach($entries as $entry) {
			$originals_table .= $this->export_original($entry) . chr(0);
			$length = $reader->strlen($this->export_original($entry));
			fwrite($fh, pack('VV', $length, $current_addr));
			$current_addr += $length + 1; // account for the NULL byte after
		}

		$exported_headers = $this->export_headers();
		fwrite($fh, pack('VV', $reader->strlen($exported_headers), $current_addr));
		$current_addr += strlen($exported_headers) + 1;
		$translations_table = $exported_headers . chr(0);

		foreach($entries as $entry) {
			$translations_table .= $this->export_translations($entry) . chr(0);
			$length = $reader->strlen($this->export_translations($entry));
			fwrite($fh, pack('VV', $length, $current_addr));
			$current_addr += $length + 1;
		}

		fwrite($fh, $originals_table);
		fwrite($fh, $translations_table);
		return true;
	}

	/**
	 * @param Translation_Entry $entry
	 * @return string
	 */
	function export_original($entry) {
		//TODO: warnings for control characters
		$exported = $entry->singular;
		if ($entry->is_plural) $exported .= chr(0).$entry->plural;
		if ($entry->context) $exported = $entry->context . chr(4) . $exported;
		return $exported;
	}

	/**
	 * @param Translation_Entry $entry
	 * @return string
	 */
	function export_translations($entry) {
		//TODO: warnings for control characters
		return $entry->is_plural ? implode(chr(0), $entry->translations) : $entry->translations[0];
	}

	/**
	 * @return string
	 */
	function export_headers() {
		$exported = '';
		foreach($this->headers as $header => $value) {
			$exported.= "$header: $value\n";
		}
		return $exported;
	}

	/**
	 * @param int $magic
	 * @return string|false
	 */
	function get_byteorder($magic) {
		// The magic is 0x950412de

		// bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565
		$magic_little = (int) - 1794895138;
		$magic_little_64 = (int) 2500072158;
		// 0xde120495
		$magic_big = ((int) - 569244523) & 0xFFFFFFFF;
		if ($magic_little == $magic || $magic_little_64 == $magic) {
			return 'little';
		} else if ($magic_big == $magic) {
			return 'big';
		} else {
			return false;
		}
	}

	/**
	 * @param POMO_FileReader $reader
	 */
	function import_from_reader($reader) {
		$endian_string = MO::get_byteorder($reader->readint32());
		if (false === $endian_string) {
			return false;
		}
		$reader->setEndian($endian_string);

		$endian = ('big' == $endian_string)? 'N' : 'V';

		$header = $reader->read(24);
		if ($reader->strlen($header) != 24)
			return false;

		// parse header
		$header = unpack("{$endian}revision/{$endian}total/{$endian}originals_lenghts_addr/{$endian}translations_lenghts_addr/{$endian}hash_length/{$endian}hash_addr", $header);
		if (!is_array($header))
			return false;

		// support revision 0 of MO format specs, only
		if ( $header['revision'] != 0 ) {
			return false;
		}

		// seek to data blocks
		$reader->seekto( $header['originals_lenghts_addr'] );

		// read originals' indices
		$originals_lengths_length = $header['translations_lenghts_addr'] - $header['originals_lenghts_addr'];
		if ( $originals_lengths_length != $header['total'] * 8 ) {
			return false;
		}

		$originals = $reader->read($originals_lengths_length);
		if ( $reader->strlen( $originals ) != $originals_lengths_length ) {
			return false;
		}

		// read translations' indices
		$translations_lenghts_length = $header['hash_addr'] - $header['translations_lenghts_addr'];
		if ( $translations_lenghts_length != $header['total'] * 8 ) {
			return false;
		}

		$translations = $reader->read($translations_lenghts_length);
		if ( $reader->strlen( $translations ) != $translations_lenghts_length ) {
			return false;
		}

		// transform raw data into set of indices
		$originals    = $reader->str_split( $originals, 8 );
		$translations = $reader->str_split( $translations, 8 );

		// skip hash table
		$strings_addr = $header['hash_addr'] + $header['hash_length'] * 4;

		$reader->seekto($strings_addr);

		$strings = $reader->read_all();
		$reader->close();

		for ( $i = 0; $i < $header['total']; $i++ ) {
			$o = unpack( "{$endian}length/{$endian}pos", $originals[$i] );
			$t = unpack( "{$endian}length/{$endian}pos", $translations[$i] );
			if ( !$o || !$t ) return false;

			// adjust offset due to reading strings to separate space before
			$o['pos'] -= $strings_addr;
			$t['pos'] -= $strings_addr;

			$original    = $reader->substr( $strings, $o['pos'], $o['length'] );
			$translation = $reader->substr( $strings, $t['pos'], $t['length'] );

			if ('' === $original) {
				$this->set_headers($this->make_headers($translation));
			} else {
				$entry = &$this->make_entry($original, $translation);
				$this->entries[$entry->key()] = &$entry;
			}
		}
		return true;
	}

	/**
	 * Build a Translation_Entry from original string and translation strings,
	 * found in a MO file
	 *
	 * @static
	 * @param string $original original string to translate from MO file. Might contain
	 * 	0x04 as context separator or 0x00 as singular/plural separator
	 * @param string $translation translation string from MO file. Might contain
	 * 	0x00 as a plural translations separator
	 */
	function &make_entry($original, $translation) {
		$entry = new Translation_Entry();
		// look for context
		$parts = explode(chr(4), $original);
		if (isset($parts[1])) {
			$original = $parts[1];
			$entry->context = $parts[0];
		}
		// look for plural original
		$parts = explode(chr(0), $original);
		$entry->singular = $parts[0];
		if (isset($parts[1])) {
			$entry->is_plural = true;
			$entry->plural = $parts[1];
		}
		// plural translations are also separated by \0
		$entry->translations = explode(chr(0), $translation);
		return $entry;
	}

	/**
	 * @param int $count
	 * @return string
	 */
	function select_plural_form($count) {
		return $this->gettext_select_plural_form($count);
	}

	/**
	 * @return int
	 */
	function get_plural_forms_count() {
		return $this->_nplurals;
	}
}
endif;


/**
 * REST API: WP_REST_Server class
 *
 * @package WordPress
 * @subpackage REST_API
 * @since 4.4.0
 */

/**
 * Core class used to implement the WordPress REST API server.
 *
 * @since 4.4.0
 */
class WP_REST_Server {

	/**
	 * Alias for GET transport method.
	 *
	 * @since 4.4.0
	 * @var string
	 */
	const READABLE = 'GET';

	/**
	 * Alias for POST transport method.
	 *
	 * @since 4.4.0
	 * @var string
	 */
	const CREATABLE = 'POST';

	/**
	 * Alias for POST, PUT, PATCH transport methods together.
	 *
	 * @since 4.4.0
	 * @var string
	 */
	const EDITABLE = 'POST, PUT, PATCH';

	/**
	 * Alias for DELETE transport method.
	 *
	 * @since 4.4.0
	 * @var string
	 */
	const DELETABLE = 'DELETE';

	/**
	 * Alias for GET, POST, PUT, PATCH & DELETE transport methods together.
	 *
	 * @since 4.4.0
	 * @var string
	 */
	const ALLMETHODS = 'GET, POST, PUT, PATCH, DELETE';

	/**
	 * Namespaces registered to the server.
	 *
	 * @since 4.4.0
	 * @access protected
	 * @var array
	 */
	protected $namespaces = array();

	/**
	 * Endpoints registered to the server.
	 *
	 * @since 4.4.0
	 * @access protected
	 * @var array
	 */
	protected $endpoints = array();

	/**
	 * Options defined for the routes.
	 *
	 * @since 4.4.0
	 * @access protected
	 * @var array
	 */
	protected $route_options = array();

	/**
	 * Instantiates the REST server.
	 *
	 * @since 4.4.0
	 * @access public
	 */
	public function __construct() {
		$this->endpoints = array(
			// Meta endpoints.
			'/' => array(
				'callback' => array( $this, 'get_index' ),
				'methods' => 'GET',
				'args' => array(
					'context' => array(
						'default' => 'view',
					),
				),
			),
		);
	}


	/**
	 * Checks the authentication headers if supplied.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @return WP_Error|null WP_Error indicates unsuccessful login, null indicates successful
	 *                       or no authentication provided
	 */
	public function check_authentication() {
		/**
		 * Filters REST authentication errors.
		 *
		 * This is used to pass a WP_Error from an authentication method back to
		 * the API.
		 *
		 * Authentication methods should check first if they're being used, as
		 * multiple authentication methods can be enabled on a site (cookies,
		 * HTTP basic auth, OAuth). If the authentication method hooked in is
		 * not actually being attempted, null should be returned to indicate
		 * another authentication method should check instead. Similarly,
		 * callbacks should ensure the value is `null` before checking for
		 * errors.
		 *
		 * A WP_Error instance can be returned if an error occurs, and this should
		 * match the format used by API methods internally (that is, the `status`
		 * data should be used). A callback can return `true` to indicate that
		 * the authentication method was used, and it succeeded.
		 *
		 * @since 4.4.0
		 *
		 * @param WP_Error|null|bool WP_Error if authentication error, null if authentication
		 *                              method wasn't used, true if authentication succeeded.
		 */
		return apply_filters( 'rest_authentication_errors', null );
	}

	/**
	 * Converts an error to a response object.
	 *
	 * This iterates over all error codes and messages to change it into a flat
	 * array. This enables simpler client behaviour, as it is represented as a
	 * list in JSON rather than an object/map.
	 *
	 * @since 4.4.0
	 * @access protected
	 *
	 * @param WP_Error $error WP_Error instance.
	 * @return WP_REST_Response List of associative arrays with code and message keys.
	 */
	protected function error_to_response( $error ) {
		$error_data = $error->get_error_data();

		if ( is_array( $error_data ) && isset( $error_data['status'] ) ) {
			$status = $error_data['status'];
		} else {
			$status = 500;
		}

		$errors = array();

		foreach ( (array) $error->errors as $code => $messages ) {
			foreach ( (array) $messages as $message ) {
				$errors[] = array( 'code' => $code, 'message' => $message, 'data' => $error->get_error_data( $code ) );
			}
		}

		$data = $errors[0];
		if ( count( $errors ) > 1 ) {
			// Remove the primary error.
			array_shift( $errors );
			$data['additional_errors'] = $errors;
		}

		$response = new WP_REST_Response( $data, $status );

		return $response;
	}

	/**
	 * Retrieves an appropriate error representation in JSON.
	 *
	 * Note: This should only be used in WP_REST_Server::serve_request(), as it
	 * cannot handle WP_Error internally. All callbacks and other internal methods
	 * should instead return a WP_Error with the data set to an array that includes
	 * a 'status' key, with the value being the HTTP status to send.
	 *
	 * @since 4.4.0
	 * @access protected
	 *
	 * @param string $code    WP_Error-style code.
	 * @param string $message Human-readable message.
	 * @param int    $status  Optional. HTTP status code to send. Default null.
	 * @return string JSON representation of the error
	 */
	protected function json_error( $code, $message, $status = null ) {
		if ( $status ) {
			$this->set_status( $status );
		}

		$error = compact( 'code', 'message' );

		return wp_json_encode( $error );
	}

	/**
	 * Handles serving an API request.
	 *
	 * Matches the current server URI to a route and runs the first matching
	 * callback then outputs a JSON representation of the returned value.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @see WP_REST_Server::dispatch()
	 *
	 * @param string $path Optional. The request route. If not set, `$_SERVER['PATH_INFO']` will be used.
	 *                     Default null.
	 * @return false|null Null if not served and a HEAD request, false otherwise.
	 */
	public function serve_request( $path = null ) {
		$content_type = isset( $_GET['_jsonp'] ) ? 'application/javascript' : 'application/json';
		$this->send_header( 'Content-Type', $content_type . '; charset=' . get_option( 'blog_charset' ) );
		$this->send_header( 'X-Robots-Tag', 'noindex' );

		$api_root = get_rest_url();
		if ( ! empty( $api_root ) ) {
			$this->send_header( 'Link', '<' . esc_url_raw( $api_root ) . '>; rel="https://api.w.org/"' );
		}

		/*
		 * Mitigate possible JSONP Flash attacks.
		 *
		 * https://miki.it/blog/2014/7/8/abusing-jsonp-with-rosetta-flash/
		 */
		$this->send_header( 'X-Content-Type-Options', 'nosniff' );
		$this->send_header( 'Access-Control-Expose-Headers', 'X-WP-Total, X-WP-TotalPages' );
		$this->send_header( 'Access-Control-Allow-Headers', 'Authorization, Content-Type' );

		/**
		 * Send nocache headers on authenticated requests.
		 *
		 * @since 4.4.0
		 *
		 * @param bool $rest_send_nocache_headers Whether to send no-cache headers.
		 */
		$send_no_cache_headers = apply_filters( 'rest_send_nocache_headers', is_user_logged_in() );
		if ( $send_no_cache_headers ) {
			foreach ( wp_get_nocache_headers() as $header => $header_value ) {
				$this->send_header( $header, $header_value );
			}
		}

		/**
		 * Filters whether the REST API is enabled.
		 *
		 * @since 4.4.0
		 * @deprecated 4.7.0 Use the rest_authentication_errors filter to restrict access to the API
		 *
		 * @param bool $rest_enabled Whether the REST API is enabled. Default true.
		 */
		apply_filters_deprecated( 'rest_enabled', array( true ), '4.7.0', 'rest_authentication_errors', __( 'The REST API can no longer be completely disabled, the rest_authentication_errors can be used to restrict access to the API, instead.' ) );

		/**
		 * Filters whether jsonp is enabled.
		 *
		 * @since 4.4.0
		 *
		 * @param bool $jsonp_enabled Whether jsonp is enabled. Default true.
		 */
		$jsonp_enabled = apply_filters( 'rest_jsonp_enabled', true );

		$jsonp_callback = null;

		if ( isset( $_GET['_jsonp'] ) ) {
			if ( ! $jsonp_enabled ) {
				echo $this->json_error( 'rest_callback_disabled', __( 'JSONP support is disabled on this site.' ), 400 );
				return false;
			}

			$jsonp_callback = $_GET['_jsonp'];
			if ( ! wp_check_jsonp_callback( $jsonp_callback ) ) {
				echo $this->json_error( 'rest_callback_invalid', __( 'Invalid JSONP callback function.' ), 400 );
				return false;
			}
		}

		if ( empty( $path ) ) {
			if ( isset( $_SERVER['PATH_INFO'] ) ) {
				$path = $_SERVER['PATH_INFO'];
			} else {
				$path = '/';
			}
		}

		$request = new WP_REST_Request( $_SERVER['REQUEST_METHOD'], $path );

		$request->set_query_params( wp_unslash( $_GET ) );
		$request->set_body_params( wp_unslash( $_POST ) );
		$request->set_file_params( $_FILES );
		$request->set_headers( $this->get_headers( wp_unslash( $_SERVER ) ) );
		$request->set_body( $this->get_raw_data() );

		/*
		 * HTTP method override for clients that can't use PUT/PATCH/DELETE. First, we check
		 * $_GET['_method']. If that is not set, we check for the HTTP_X_HTTP_METHOD_OVERRIDE
		 * header.
		 */
		if ( isset( $_GET['_method'] ) ) {
			$request->set_method( $_GET['_method'] );
		} elseif ( isset( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] ) ) {
			$request->set_method( $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] );
		}

		$result = $this->check_authentication();

		if ( ! is_wp_error( $result ) ) {
			$result = $this->dispatch( $request );
		}

		// Normalize to either WP_Error or WP_REST_Response...
		$result = rest_ensure_response( $result );

		// ...then convert WP_Error across.
		if ( is_wp_error( $result ) ) {
			$result = $this->error_to_response( $result );
		}

		/**
		 * Filters the API response.
		 *
		 * Allows modification of the response before returning.
		 *
		 * @since 4.4.0
		 * @since 4.5.0 Applied to embedded responses.
		 *
		 * @param WP_HTTP_Response $result  Result to send to the client. Usually a WP_REST_Response.
		 * @param WP_REST_Server   $this    Server instance.
		 * @param WP_REST_Request  $request Request used to generate the response.
		 */
		$result = apply_filters( 'rest_post_dispatch', rest_ensure_response( $result ), $this, $request );

		// Wrap the response in an envelope if asked for.
		if ( isset( $_GET['_envelope'] ) ) {
			$result = $this->envelope_response( $result, isset( $_GET['_embed'] ) );
		}

		// Send extra data from response objects.
		$headers = $result->get_headers();
		$this->send_headers( $headers );

		$code = $result->get_status();
		$this->set_status( $code );

		/**
		 * Filters whether the request has already been served.
		 *
		 * Allow sending the request manually - by returning true, the API result
		 * will not be sent to the client.
		 *
		 * @since 4.4.0
		 *
		 * @param bool             $served  Whether the request has already been served.
		 *                                           Default false.
		 * @param WP_HTTP_Response $result  Result to send to the client. Usually a WP_REST_Response.
		 * @param WP_REST_Request  $request Request used to generate the response.
		 * @param WP_REST_Server   $this    Server instance.
		 */
		$served = apply_filters( 'rest_pre_serve_request', false, $result, $request, $this );

		if ( ! $served ) {
			if ( 'HEAD' === $request->get_method() ) {
				return null;
			}

			// Embed links inside the request.
			$result = $this->response_to_data( $result, isset( $_GET['_embed'] ) );

			$result = wp_json_encode( $result );

			$json_error_message = $this->get_json_last_error();
			if ( $json_error_message ) {
				$json_error_obj = new WP_Error( 'rest_encode_error', $json_error_message, array( 'status' => 500 ) );
				$result = $this->error_to_response( $json_error_obj );
				$result = wp_json_encode( $result->data[0] );
			}

			if ( $jsonp_callback ) {
				// Prepend '/**/' to mitigate possible JSONP Flash attacks.
				// https://miki.it/blog/2014/7/8/abusing-jsonp-with-rosetta-flash/
				echo '/**/' . $jsonp_callback . '(' . $result . ')';
			} else {
				echo $result;
			}
		}
		return null;
	}

	/**
	 * Converts a response to data to send.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param WP_REST_Response $response Response object.
	 * @param bool             $embed    Whether links should be embedded.
	 * @return array {
	 *     Data with sub-requests embedded.
	 *
	 *     @type array [$_links]    Links.
	 *     @type array [$_embedded] Embeddeds.
	 * }
	 */
	public function response_to_data( $response, $embed ) {
		$data  = $response->get_data();
		$links = $this->get_compact_response_links( $response );

		if ( ! empty( $links ) ) {
			// Convert links to part of the data.
			$data['_links'] = $links;
		}
		if ( $embed ) {
			// Determine if this is a numeric array.
			if ( wp_is_numeric_array( $data ) ) {
				$data = array_map( array( $this, 'embed_links' ), $data );
			} else {
				$data = $this->embed_links( $data );
			}
		}

		return $data;
	}

	/**
	 * Retrieves links from a response.
	 *
	 * Extracts the links from a response into a structured hash, suitable for
	 * direct output.
	 *
	 * @since 4.4.0
	 * @access public
	 * @static
	 *
	 * @param WP_REST_Response $response Response to extract links from.
	 * @return array Map of link relation to list of link hashes.
	 */
	public static function get_response_links( $response ) {
		$links = $response->get_links();
		if ( empty( $links ) ) {
			return array();
		}

		// Convert links to part of the data.
		$data = array();
		foreach ( $links as $rel => $items ) {
			$data[ $rel ] = array();

			foreach ( $items as $item ) {
				$attributes = $item['attributes'];
				$attributes['href'] = $item['href'];
				$data[ $rel ][] = $attributes;
			}
		}

		return $data;
	}

	/**
	 * Retrieves the CURIEs (compact URIs) used for relations.
	 *
	 * Extracts the links from a response into a structured hash, suitable for
	 * direct output.
	 *
	 * @since 4.5.0
	 * @access public
	 * @static
	 *
	 * @param WP_REST_Response $response Response to extract links from.
	 * @return array Map of link relation to list of link hashes.
	 */
	public static function get_compact_response_links( $response ) {
		$links = self::get_response_links( $response );

		if ( empty( $links ) ) {
			return array();
		}

		$curies = $response->get_curies();
		$used_curies = array();

		foreach ( $links as $rel => $items ) {

			// Convert $rel URIs to their compact versions if they exist.
			foreach ( $curies as $curie ) {
				$href_prefix = substr( $curie['href'], 0, strpos( $curie['href'], '{rel}' ) );
				if ( strpos( $rel, $href_prefix ) !== 0 ) {
					continue;
				}

				// Relation now changes from '$uri' to '$curie:$relation'.
				$rel_regex = str_replace( '\{rel\}', '(.+)', preg_quote( $curie['href'], '!' ) );
				preg_match( '!' . $rel_regex . '!', $rel, $matches );
				if ( $matches ) {
					$new_rel = $curie['name'] . ':' . $matches[1];
					$used_curies[ $curie['name'] ] = $curie;
					$links[ $new_rel ] = $items;
					unset( $links[ $rel ] );
					break;
				}
			}
		}

		// Push the curies onto the start of the links array.
		if ( $used_curies ) {
			$links['curies'] = array_values( $used_curies );
		}

		return $links;
	}

	/**
	 * Embeds the links from the data into the request.
	 *
	 * @since 4.4.0
	 * @access protected
	 *
	 * @param array $data Data from the request.
	 * @return array {
	 *     Data with sub-requests embedded.
	 *
	 *     @type array [$_links]    Links.
	 *     @type array [$_embedded] Embeddeds.
	 * }
	 */
	protected function embed_links( $data ) {
		if ( empty( $data['_links'] ) ) {
			return $data;
		}

		$embedded = array();

		foreach ( $data['_links'] as $rel => $links ) {
			// Ignore links to self, for obvious reasons.
			if ( 'self' === $rel ) {
				continue;
			}

			$embeds = array();

			foreach ( $links as $item ) {
				// Determine if the link is embeddable.
				if ( empty( $item['embeddable'] ) ) {
					// Ensure we keep the same order.
					$embeds[] = array();
					continue;
				}

				// Run through our internal routing and serve.
				$request = WP_REST_Request::from_url( $item['href'] );
				if ( ! $request ) {
					$embeds[] = array();
					continue;
				}

				// Embedded resources get passed context=embed.
				if ( empty( $request['context'] ) ) {
					$request['context'] = 'embed';
				}

				$response = $this->dispatch( $request );

				/** This filter is documented in wp-includes/rest-api/class-wp-rest-server.php */
				$response = apply_filters( 'rest_post_dispatch', rest_ensure_response( $response ), $this, $request );

				$embeds[] = $this->response_to_data( $response, false );
			}

			// Determine if any real links were found.
			$has_links = count( array_filter( $embeds ) );

			if ( $has_links ) {
				$embedded[ $rel ] = $embeds;
			}
		}

		if ( ! empty( $embedded ) ) {
			$data['_embedded'] = $embedded;
		}

		return $data;
	}

	/**
	 * Wraps the response in an envelope.
	 *
	 * The enveloping technique is used to work around browser/client
	 * compatibility issues. Essentially, it converts the full HTTP response to
	 * data instead.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param WP_REST_Response $response Response object.
	 * @param bool             $embed    Whether links should be embedded.
	 * @return WP_REST_Response New response with wrapped data
	 */
	public function envelope_response( $response, $embed ) {
		$envelope = array(
			'body'    => $this->response_to_data( $response, $embed ),
			'status'  => $response->get_status(),
			'headers' => $response->get_headers(),
		);

		/**
		 * Filters the enveloped form of a response.
		 *
		 * @since 4.4.0
		 *
		 * @param array            $envelope Envelope data.
		 * @param WP_REST_Response $response Original response data.
		 */
		$envelope = apply_filters( 'rest_envelope_response', $envelope, $response );

		// Ensure it's still a response and return.
		return rest_ensure_response( $envelope );
	}

	/**
	 * Registers a route to the server.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param string $namespace  Namespace.
	 * @param string $route      The REST route.
	 * @param array  $route_args Route arguments.
	 * @param bool   $override   Optional. Whether the route should be overridden if it already exists.
	 *                           Default false.
	 */
	public function register_route( $namespace, $route, $route_args, $override = false ) {
		if ( ! isset( $this->namespaces[ $namespace ] ) ) {
			$this->namespaces[ $namespace ] = array();

			$this->register_route( $namespace, '/' . $namespace, array(
				array(
					'methods' => self::READABLE,
					'callback' => array( $this, 'get_namespace_index' ),
					'args' => array(
						'namespace' => array(
							'default' => $namespace,
						),
						'context' => array(
							'default' => 'view',
						),
					),
				),
			) );
		}

		// Associative to avoid double-registration.
		$this->namespaces[ $namespace ][ $route ] = true;
		$route_args['namespace'] = $namespace;

		if ( $override || empty( $this->endpoints[ $route ] ) ) {
			$this->endpoints[ $route ] = $route_args;
		} else {
			$this->endpoints[ $route ] = array_merge( $this->endpoints[ $route ], $route_args );
		}
	}

	/**
	 * Retrieves the route map.
	 *
	 * The route map is an associative array with path regexes as the keys. The
	 * value is an indexed array with the callback function/method as the first
	 * item, and a bitmask of HTTP methods as the second item (see the class
	 * constants).
	 *
	 * Each route can be mapped to more than one callback by using an array of
	 * the indexed arrays. This allows mapping e.g. GET requests to one callback
	 * and POST requests to another.
	 *
	 * Note that the path regexes (array keys) must have @ escaped, as this is
	 * used as the delimiter with preg_match()
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @return array `'/path/regex' => array( $callback, $bitmask )` or
	 *               `'/path/regex' => array( array( $callback, $bitmask ), ...)`.
	 */
	public function get_routes() {

		/**
		 * Filters the array of available endpoints.
		 *
		 * @since 4.4.0
		 *
		 * @param array $endpoints The available endpoints. An array of matching regex patterns, each mapped
		 *                         to an array of callbacks for the endpoint. These take the format
		 *                         `'/path/regex' => array( $callback, $bitmask )` or
		 *                         `'/path/regex' => array( array( $callback, $bitmask ).
		 */
		$endpoints = apply_filters( 'rest_endpoints', $this->endpoints );

		// Normalise the endpoints.
		$defaults = array(
			'methods'       => '',
			'accept_json'   => false,
			'accept_raw'    => false,
			'show_in_index' => true,
			'args'          => array(),
		);

		foreach ( $endpoints as $route => &$handlers ) {

			if ( isset( $handlers['callback'] ) ) {
				// Single endpoint, add one deeper.
				$handlers = array( $handlers );
			}

			if ( ! isset( $this->route_options[ $route ] ) ) {
				$this->route_options[ $route ] = array();
			}

			foreach ( $handlers as $key => &$handler ) {

				if ( ! is_numeric( $key ) ) {
					// Route option, move it to the options.
					$this->route_options[ $route ][ $key ] = $handler;
					unset( $handlers[ $key ] );
					continue;
				}

				$handler = wp_parse_args( $handler, $defaults );

				// Allow comma-separated HTTP methods.
				if ( is_string( $handler['methods'] ) ) {
					$methods = explode( ',', $handler['methods'] );
				} elseif ( is_array( $handler['methods'] ) ) {
					$methods = $handler['methods'];
				} else {
					$methods = array();
				}

				$handler['methods'] = array();

				foreach ( $methods as $method ) {
					$method = strtoupper( trim( $method ) );
					$handler['methods'][ $method ] = true;
				}
			}
		}

		return $endpoints;
	}

	/**
	 * Retrieves namespaces registered on the server.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @return array List of registered namespaces.
	 */
	public function get_namespaces() {
		return array_keys( $this->namespaces );
	}

	/**
	 * Retrieves specified options for a route.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param string $route Route pattern to fetch options for.
	 * @return array|null Data as an associative array if found, or null if not found.
	 */
	public function get_route_options( $route ) {
		if ( ! isset( $this->route_options[ $route ] ) ) {
			return null;
		}

		return $this->route_options[ $route ];
	}

	/**
	 * Matches the request to a callback and call it.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param WP_REST_Request $request Request to attempt dispatching.
	 * @return WP_REST_Response Response returned by the callback.
	 */
	public function dispatch( $request ) {
		/**
		 * Filters the pre-calculated result of a REST dispatch request.
		 *
		 * Allow hijacking the request before dispatching by returning a non-empty. The returned value
		 * will be used to serve the request instead.
		 *
		 * @since 4.4.0
		 *
		 * @param mixed           $result  Response to replace the requested version with. Can be anything
		 *                                 a normal endpoint can return, or null to not hijack the request.
		 * @param WP_REST_Server  $this    Server instance.
		 * @param WP_REST_Request $request Request used to generate the response.
		 */
		$result = apply_filters( 'rest_pre_dispatch', null, $this, $request );

		if ( ! empty( $result ) ) {
			return $result;
		}

		$method = $request->get_method();
		$path   = $request->get_route();

		foreach ( $this->get_routes() as $route => $handlers ) {
			$match = preg_match( '@^' . $route . '$@i', $path, $args );

			if ( ! $match ) {
				continue;
			}

			foreach ( $handlers as $handler ) {
				$callback  = $handler['callback'];
				$response = null;

				// Fallback to GET method if no HEAD method is registered.
				$checked_method = $method;
				if ( 'HEAD' === $method && empty( $handler['methods']['HEAD'] ) ) {
					$checked_method = 'GET';
				}
				if ( empty( $handler['methods'][ $checked_method ] ) ) {
					continue;
				}

				if ( ! is_callable( $callback ) ) {
					$response = new WP_Error( 'rest_invalid_handler', __( 'The handler for the route is invalid' ), array( 'status' => 500 ) );
				}

				if ( ! is_wp_error( $response ) ) {
					// Remove the redundant preg_match argument.
					unset( $args[0] );

					$request->set_url_params( $args );
					$request->set_attributes( $handler );

					$defaults = array();

					foreach ( $handler['args'] as $arg => $options ) {
						if ( isset( $options['default'] ) ) {
							$defaults[ $arg ] = $options['default'];
						}
					}

					$request->set_default_params( $defaults );

					$check_required = $request->has_valid_params();
					if ( is_wp_error( $check_required ) ) {
						$response = $check_required;
					} else {
						$check_sanitized = $request->sanitize_params();
						if ( is_wp_error( $check_sanitized ) ) {
							$response = $check_sanitized;
						}
					}
				}

				/**
				 * Filters the response before executing any REST API callbacks.
				 *
				 * Allows plugins to perform additional validation after a
				 * request is initialized and matched to a registered route,
				 * but before it is executed.
				 *
				 * Note that this filter will not be called for requests that
				 * fail to authenticate or match to a registered route.
				 *
				 * @since 4.7.0
				 *
				 * @param WP_HTTP_Response $response Result to send to the client. Usually a WP_REST_Response.
				 * @param WP_REST_Server   $handler  ResponseHandler instance (usually WP_REST_Server).
				 * @param WP_REST_Request  $request  Request used to generate the response.
				 */
				$response = apply_filters( 'rest_request_before_callbacks', $response, $handler, $request );

				if ( ! is_wp_error( $response ) ) {
					// Check permission specified on the route.
					if ( ! empty( $handler['permission_callback'] ) ) {
						$permission = call_user_func( $handler['permission_callback'], $request );

						if ( is_wp_error( $permission ) ) {
							$response = $permission;
						} elseif ( false === $permission || null === $permission ) {
							$response = new WP_Error( 'rest_forbidden', __( 'Sorry, you are not allowed to do that.' ), array( 'status' => 403 ) );
						}
					}
				}

				if ( ! is_wp_error( $response ) ) {
					/**
					 * Filters the REST dispatch request result.
					 *
					 * Allow plugins to override dispatching the request.
					 *
					 * @since 4.4.0
					 * @since 4.5.0 Added `$route` and `$handler` parameters.
					 *
					 * @param bool            $dispatch_result Dispatch result, will be used if not empty.
					 * @param WP_REST_Request $request         Request used to generate the response.
					 * @param string          $route           Route matched for the request.
					 * @param array           $handler         Route handler used for the request.
					 */
					$dispatch_result = apply_filters( 'rest_dispatch_request', null, $request, $route, $handler );

					// Allow plugins to halt the request via this filter.
					if ( null !== $dispatch_result ) {
						$response = $dispatch_result;
					} else {
						$response = call_user_func( $callback, $request );
					}
				}

				/**
				 * Filters the response immediately after executing any REST API
				 * callbacks.
				 *
				 * Allows plugins to perform any needed cleanup, for example,
				 * to undo changes made during the {@see 'rest_request_before_callbacks'}
				 * filter.
				 *
				 * Note that this filter will not be called for requests that
				 * fail to authenticate or match to a registered route.
				 *
				 * Note that an endpoint's `permission_callback` can still be
				 * called after this filter - see `rest_send_allow_header()`.
				 *
				 * @since 4.7.0
				 *
				 * @param WP_HTTP_Response $response Result to send to the client. Usually a WP_REST_Response.
				 * @param WP_REST_Server   $handler  ResponseHandler instance (usually WP_REST_Server).
				 * @param WP_REST_Request  $request  Request used to generate the response.
				 */
				$response = apply_filters( 'rest_request_after_callbacks', $response, $handler, $request );

				if ( is_wp_error( $response ) ) {
					$response = $this->error_to_response( $response );
				} else {
					$response = rest_ensure_response( $response );
				}

				$response->set_matched_route( $route );
				$response->set_matched_handler( $handler );

				return $response;
			}
		}

		return $this->error_to_response( new WP_Error( 'rest_no_route', __( 'No route was found matching the URL and request method' ), array( 'status' => 404 ) ) );
	}

	/**
	 * Returns if an error occurred during most recent JSON encode/decode.
	 *
	 * Strings to be translated will be in format like
	 * "Encoding error: Maximum stack depth exceeded".
	 *
	 * @since 4.4.0
	 * @access protected
	 *
	 * @return bool|string Boolean false or string error message.
	 */
	protected function get_json_last_error() {
		// See https://core.trac.wordpress.org/ticket/27799.
		if ( ! function_exists( 'json_last_error' ) ) {
			return false;
		}

		$last_error_code = json_last_error();

		if ( ( defined( 'JSON_ERROR_NONE' ) && JSON_ERROR_NONE === $last_error_code ) || empty( $last_error_code ) ) {
			return false;
		}

		return json_last_error_msg();
	}

	/**
	 * Retrieves the site index.
	 *
	 * This endpoint describes the capabilities of the site.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param array $request {
	 *     Request.
	 *
	 *     @type string $context Context.
	 * }
	 * @return array Index entity
	 */
	public function get_index( $request ) {
		// General site data.
		$available = array(
			'name'            => get_option( 'blogname' ),
			'description'     => get_option( 'blogdescription' ),
			'url'             => get_option( 'siteurl' ),
			'home'            => home_url(),
			'gmt_offset'      => get_option( 'gmt_offset' ),
			'timezone_string' => get_option( 'timezone_string' ),
			'namespaces'      => array_keys( $this->namespaces ),
			'authentication'  => array(),
			'routes'          => $this->get_data_for_routes( $this->get_routes(), $request['context'] ),
		);

		$response = new WP_REST_Response( $available );

		$response->add_link( 'help', 'http://v2.wp-api.org/' );

		/**
		 * Filters the API root index data.
		 *
		 * This contains the data describing the API. This includes information
		 * about supported authentication schemes, supported namespaces, routes
		 * available on the API, and a small amount of data about the site.
		 *
		 * @since 4.4.0
		 *
		 * @param WP_REST_Response $response Response data.
		 */
		return apply_filters( 'rest_index', $response );
	}

	/**
	 * Retrieves the index for a namespace.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param WP_REST_Request $request REST request instance.
	 * @return WP_REST_Response|WP_Error WP_REST_Response instance if the index was found,
	 *                                   WP_Error if the namespace isn't set.
	 */
	public function get_namespace_index( $request ) {
		$namespace = $request['namespace'];

		if ( ! isset( $this->namespaces[ $namespace ] ) ) {
			return new WP_Error( 'rest_invalid_namespace', __( 'The specified namespace could not be found.' ), array( 'status' => 404 ) );
		}

		$routes = $this->namespaces[ $namespace ];
		$endpoints = array_intersect_key( $this->get_routes(), $routes );

		$data = array(
			'namespace' => $namespace,
			'routes' => $this->get_data_for_routes( $endpoints, $request['context'] ),
		);
		$response = rest_ensure_response( $data );

		// Link to the root index.
		$response->add_link( 'up', rest_url( '/' ) );

		/**
		 * Filters the namespace index data.
		 *
		 * This typically is just the route data for the namespace, but you can
		 * add any data you'd like here.
		 *
		 * @since 4.4.0
		 *
		 * @param WP_REST_Response $response Response data.
		 * @param WP_REST_Request  $request  Request data. The namespace is passed as the 'namespace' parameter.
		 */
		return apply_filters( 'rest_namespace_index', $response, $request );
	}

	/**
	 * Retrieves the publicly-visible data for routes.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param array  $routes  Routes to get data for.
	 * @param string $context Optional. Context for data. Accepts 'view' or 'help'. Default 'view'.
	 * @return array Route data to expose in indexes.
	 */
	public function get_data_for_routes( $routes, $context = 'view' ) {
		$available = array();

		// Find the available routes.
		foreach ( $routes as $route => $callbacks ) {
			$data = $this->get_data_for_route( $route, $callbacks, $context );
			if ( empty( $data ) ) {
				continue;
			}

			/**
			 * Filters the REST endpoint data.
			 *
			 * @since 4.4.0
			 *
			 * @param WP_REST_Request $request Request data. The namespace is passed as the 'namespace' parameter.
			 */
			$available[ $route ] = apply_filters( 'rest_endpoints_description', $data );
		}

		/**
		 * Filters the publicly-visible data for routes.
		 *
		 * This data is exposed on indexes and can be used by clients or
		 * developers to investigate the site and find out how to use it. It
		 * acts as a form of self-documentation.
		 *
		 * @since 4.4.0
		 *
		 * @param array $available Map of route to route data.
		 * @param array $routes    Internal route data as an associative array.
		 */
		return apply_filters( 'rest_route_data', $available, $routes );
	}

	/**
	 * Retrieves publicly-visible data for the route.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param string $route     Route to get data for.
	 * @param array  $callbacks Callbacks to convert to data.
	 * @param string $context   Optional. Context for the data. Accepts 'view' or 'help'. Default 'view'.
	 * @return array|null Data for the route, or null if no publicly-visible data.
	 */
	public function get_data_for_route( $route, $callbacks, $context = 'view' ) {
		$data = array(
			'namespace' => '',
			'methods' => array(),
			'endpoints' => array(),
		);

		if ( isset( $this->route_options[ $route ] ) ) {
			$options = $this->route_options[ $route ];

			if ( isset( $options['namespace'] ) ) {
				$data['namespace'] = $options['namespace'];
			}

			if ( isset( $options['schema'] ) && 'help' === $context ) {
				$data['schema'] = call_user_func( $options['schema'] );
			}
		}

		$route = preg_replace( '#\(\?P<(\w+?)>.*?\)#', '{$1}', $route );

		foreach ( $callbacks as $callback ) {
			// Skip to the next route if any callback is hidden.
			if ( empty( $callback['show_in_index'] ) ) {
				continue;
			}

			$data['methods'] = array_merge( $data['methods'], array_keys( $callback['methods'] ) );
			$endpoint_data = array(
				'methods' => array_keys( $callback['methods'] ),
			);

			if ( isset( $callback['args'] ) ) {
				$endpoint_data['args'] = array();
				foreach ( $callback['args'] as $key => $opts ) {
					$arg_data = array(
						'required' => ! empty( $opts['required'] ),
					);
					if ( isset( $opts['default'] ) ) {
						$arg_data['default'] = $opts['default'];
					}
					if ( isset( $opts['enum'] ) ) {
						$arg_data['enum'] = $opts['enum'];
					}
					if ( isset( $opts['description'] ) ) {
						$arg_data['description'] = $opts['description'];
					}
					if ( isset( $opts['type'] ) ) {
						$arg_data['type'] = $opts['type'];
					}
					if ( isset( $opts['items'] ) ) {
						$arg_data['items'] = $opts['items'];
					}
					$endpoint_data['args'][ $key ] = $arg_data;
				}
			}

			$data['endpoints'][] = $endpoint_data;

			// For non-variable routes, generate links.
			if ( strpos( $route, '{' ) === false ) {
				$data['_links'] = array(
					'self' => rest_url( $route ),
				);
			}
		}

		if ( empty( $data['methods'] ) ) {
			// No methods supported, hide the route.
			return null;
		}

		return $data;
	}

	/**
	 * Sends an HTTP status code.
	 *
	 * @since 4.4.0
	 * @access protected
	 *
	 * @param int $code HTTP status.
	 */
	protected function set_status( $code ) {
		status_header( $code );
	}

	/**
	 * Sends an HTTP header.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param string $key Header key.
	 * @param string $value Header value.
	 */
	public function send_header( $key, $value ) {
		/*
		 * Sanitize as per RFC2616 (Section 4.2):
		 *
		 * Any LWS that occurs between field-content MAY be replaced with a
		 * single SP before interpreting the field value or forwarding the
		 * message downstream.
		 */
		$value = preg_replace( '/\s+/', ' ', $value );
		header( sprintf( '%s: %s', $key, $value ) );
	}

	/**
	 * Sends multiple HTTP headers.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param array $headers Map of header name to header value.
	 */
	public function send_headers( $headers ) {
		foreach ( $headers as $key => $value ) {
			$this->send_header( $key, $value );
		}
	}

	/**
	 * Retrieves the raw request entity (body).
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @global string $HTTP_RAW_POST_DATA Raw post data.
	 *
	 * @return string Raw request data.
	 */
	public static function get_raw_data() {
		global $HTTP_RAW_POST_DATA;

		/*
		 * A bug in PHP < 5.2.2 makes $HTTP_RAW_POST_DATA not set by default,
		 * but we can do it ourself.
		 */
		if ( ! isset( $HTTP_RAW_POST_DATA ) ) {
			$HTTP_RAW_POST_DATA = file_get_contents( 'php://input' );
		}

		return $HTTP_RAW_POST_DATA;
	}

	/**
	 * Extracts headers from a PHP-style $_SERVER array.
	 *
	 * @since 4.4.0
	 * @access public
	 *
	 * @param array $server Associative array similar to `$_SERVER`.
	 * @return array Headers extracted from the input.
	 */
	public function get_headers( $server ) {
		$headers = array();

		// CONTENT_* headers are not prefixed with HTTP_.
		$additional = array( 'CONTENT_LENGTH' => true, 'CONTENT_MD5' => true, 'CONTENT_TYPE' => true );

		foreach ( $server as $key => $value ) {
			if ( strpos( $key, 'HTTP_' ) === 0 ) {
				$headers[ substr( $key, 5 ) ] = $value;
			} elseif ( isset( $additional[ $key ] ) ) {
				$headers[ $key ] = $value;
			}
		}

		return $headers;
	}
}


/**
 * 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(
			'args' => array(
				'status' => array(
					'description' => __( 'An alphanumeric identifier for the status.' ),
					'type'        => 'string',
				),
			),
			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' ) ),
		);
	}

}