<?php

if ( !class_exists('SimplePie') )

	require_once( ABSPATH . WPINC . '/class-simplepie.php' );

class WP_Feed_Cache extends SimplePie_Cache {

	/**

	 * Create a new SimplePie_Cache object

	 *

	 * @static

	 * @access public

	 */

	function create($location, $filename, $extension) {

		return new WP_Feed_Cache_Transient($location, $filename, $extension);

	}

}

class WP_Feed_Cache_Transient {

	var $name;

	var $mod_name;

	var $lifetime = 43200; //Default lifetime in cache of 12 hours

	function __construct($location, $filename, $extension) {

		$this->name = 'feed_' . $filename;

		$this->mod_name = 'feed_mod_' . $filename;

		$lifetime = $this->lifetime;

		/**

		 * Filter the transient lifetime of the feed cache.

		 *

		 * @since 2.8.0

		 *

		 * @param int    $lifetime Cache duration in seconds. Default is 43200 seconds (12 hours).

		 * @param string $filename Unique identifier for the cache object.

		 */

		$this->lifetime = apply_filters( 'wp_feed_cache_transient_lifetime', $lifetime, $filename);

	}

	function save($data) {

		if ( is_a($data, 'SimplePie') )

			$data = $data->data;

		set_transient($this->name, $data, $this->lifetime);

		set_transient($this->mod_name, time(), $this->lifetime);

		return true;

	}

	function load() {

		return get_transient($this->name);

	}

	function mtime() {

		return get_transient($this->mod_name);

	}

	function touch() {

		return set_transient($this->mod_name, time(), $this->lifetime);

	}

	function unlink() {

		delete_transient($this->name);

		delete_transient($this->mod_name);

		return true;

	}

}

class WP_SimplePie_File extends SimplePie_File {

	function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false) {

		$this->url = $url;

		$this->timeout = $timeout;

		$this->redirects = $redirects;

		$this->headers = $headers;

		$this->useragent = $useragent;

		$this->method = SIMPLEPIE_FILE_SOURCE_REMOTE;

		if ( preg_match('/^http(s)?:\/\//i', $url) ) {

			$args = array(

				'timeout' => $this->timeout,

				'redirection' => $this->redirects,

			);

			if ( !empty($this->headers) )

				$args['headers'] = $this->headers;

			if ( SIMPLEPIE_USERAGENT != $this->useragent ) //Use default WP user agent unless custom has been specified

				$args['user-agent'] = $this->useragent;

			$res = wp_safe_remote_request($url, $args);

			if ( is_wp_error($res) ) {

				$this->error = 'WP HTTP Error: ' . $res->get_error_message();

				$this->success = false;

			} else {

				$this->headers = wp_remote_retrieve_headers( $res );

				$this->body = wp_remote_retrieve_body( $res );

				$this->status_code = wp_remote_retrieve_response_code( $res );

			}

		} else {

			$this->error = '';

			$this->success = false;

		}

	}

}

/**

 * WordPress SimplePie Sanitization Class

 *

 * Extension of the SimplePie_Sanitize class to use KSES, because

 * we cannot universally count on DOMDocument being available

 *

 * @package WordPress

 * @since 3.5.0

 */

class WP_SimplePie_Sanitize_KSES extends SimplePie_Sanitize {

	public function sanitize( $data, $type, $base = '' ) {

		$data = trim( $data );

		if ( $type & SIMPLEPIE_CONSTRUCT_MAYBE_HTML ) {

			if (preg_match('/(&(#(x[0-9a-fA-F]+|[0-9]+)|[a-zA-Z0-9]+)|<\/[A-Za-z][^\x09\x0A\x0B\x0C\x0D\x20\x2F\x3E]*' . SIMPLEPIE_PCRE_HTML_ATTRIBUTE . '>)/', $data)) {

				$type |= SIMPLEPIE_CONSTRUCT_HTML;

			}

			else {

				$type |= SIMPLEPIE_CONSTRUCT_TEXT;

			}

		}

		if ( $type & SIMPLEPIE_CONSTRUCT_BASE64 ) {

			$data = base64_decode( $data );

		}

		if ( $type & ( SIMPLEPIE_CONSTRUCT_HTML | SIMPLEPIE_CONSTRUCT_XHTML ) ) {

			$data = wp_kses_post( $data );

			if ( $this->output_encoding !== 'UTF-8' ) {

				$data = $this->registry->call( 'Misc', 'change_encoding', array( $data, 'UTF-8', $this->output_encoding ) );

			}

			return $data;

		} else {

			return parent::sanitize( $data, $type, $base );

		}

	}

}