<?php

/**

 * SimplePie Redis Cache Extension

 *

 * @package SimplePie

 * @author Jan Kozak <galvani78@gmail.com>

 * @link http://galvani.cz/

 * @license http://www.opensource.org/licenses/bsd-license.php BSD License

 * @version 0.2.9

 */

/**

 * Caches data to redis

 *

 * Registered for URLs with the "redis" protocol

 *

 * For example, `redis://localhost:6379/?timeout=3600&prefix=sp_&dbIndex=0` will

 * connect to redis on `localhost` on port 6379. All tables will be

 * prefixed with `simple_primary-` and data will expire after 3600 seconds

 *

 * @package SimplePie

 * @subpackage Caching

 * @uses Redis

 */

class SimplePie_Cache_Redis implements SimplePie_Cache_Base {

    /**

     * Redis instance

     *

     * @var \Redis

     */

    protected $cache;

    /**

     * Options

     *

     * @var array

     */

    protected $options;

    /**

     * Cache name

     *

     * @var string

     */

    protected $name;

    /**

     * Cache Data

     *

     * @var type

     */

    protected $data;

    /**

     * Create a new cache object

     *

     * @param string $location Location string (from SimplePie::$cache_location)

     * @param string $name Unique ID for the cache

     * @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data

     */

    public function __construct($location, $name, $options = null) {

        //$this->cache = \flow\simple\cache\Redis::getRedisClientInstance();

        $parsed = SimplePie_Cache::parse_URL($location);

        $redis = new Redis();

        $redis->connect($parsed['host'], $parsed['port']);

        if (isset($parsed['pass'])) {

            $redis->auth($parsed['pass']);

        }

        if (isset($parsed['path'])) {

            $redis->select((int)substr($parsed['path'], 1));

        }

        $this->cache = $redis;

        if (!is_null($options) && is_array($options)) {

            $this->options = $options;

        } else {

            $this->options = array (

                'prefix' => 'rss:simple_primary:',

                'expire' => 0,

            );

        }

        $this->name = $this->options['prefix'] . $name;

    }

    /**

     * @param \Redis $cache

     */

    public function setRedisClient(\Redis $cache) {

        $this->cache = $cache;

    }

    /**

     * Save data to the cache

     *

     * @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property

     * @return bool Successfulness

     */

    public function save($data) {

        if ($data instanceof SimplePie) {

            $data = $data->data;

        }

        $response = $this->cache->set($this->name, serialize($data));

        if ($this->options['expire']) {

            $this->cache->expire($this->name, $this->options['expire']);

        }

        return $response;

    }

    /**

     * Retrieve the data saved to the cache

     *

     * @return array Data for SimplePie::$data

     */

    public function load() {

        $data = $this->cache->get($this->name);

        if ($data !== false) {

            return unserialize($data);

        }

        return false;

    }

    /**

     * Retrieve the last modified time for the cache

     *

     * @return int Timestamp

     */

    public function mtime() {

        $data = $this->cache->get($this->name);

        if ($data !== false) {

            return time();

        }

        return false;

    }

    /**

     * Set the last modified time to the current time

     *

     * @return bool Success status

     */

    public function touch() {

        $data = $this->cache->get($this->name);

        if ($data !== false) {

            $return = $this->cache->set($this->name, $data);

            if ($this->options['expire']) {

                return $this->cache->expire($this->name, $this->options['expire']);

            }

            return $return;

        }

        return false;

    }

    /**

     * Remove the cache

     *

     * @return bool Success status

     */

    public function unlink() {

        return $this->cache->set($this->name, null);

    }

}