<?php

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/**

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* SimplePie Redis Cache Extension

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*

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* @package SimplePie

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

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* @link http://galvani.cz/

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

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* @version 0.2.9

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*/

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/**

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* Caches data to redis

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*

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* Registered for URLs with the "redis" protocol

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*

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

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

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

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*

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* @package SimplePie

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* @subpackage Caching

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* @uses Redis

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*/

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class SimplePie_Cache_Redis implements SimplePie_Cache_Base {

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/**

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* Redis instance

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*

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* @var \Redis

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*/

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protected $cache;

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/**

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* Options

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*

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* @var array

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*/

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protected $options;

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/**

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* Cache name

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*

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* @var string

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*/

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protected $name;

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/**

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* Cache Data

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*

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* @var type

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*/

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protected $data;

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/**

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* Create a new cache object

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*

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

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* @param string $name Unique ID for the cache

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

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*/

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

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

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

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$redis = new Redis();

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

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

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

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}

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

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

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}

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$this->cache = $redis;

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

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$this->options = $options;

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} else {

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$this->options = array (

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

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'expire' => 0,

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);

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}

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

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}

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/**

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* @param \Redis $cache

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*/

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public function setRedisClient(\Redis $cache) {

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$this->cache = $cache;

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}

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/**

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* Save data to the cache

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*

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

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* @return bool Successfulness

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*/

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public function save($data) {

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if ($data instanceof SimplePie) {

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$data = $data->data;

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}

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

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

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

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}

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return $response;

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}

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/**

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* Retrieve the data saved to the cache

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*

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* @return array Data for SimplePie::$data

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*/

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public function load() {

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

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if ($data !== false) {

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return unserialize($data);

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}

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return false;

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}

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/**

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* Retrieve the last modified time for the cache

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*

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* @return int Timestamp

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*/

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public function mtime() {

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

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if ($data !== false) {

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return time();

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}

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return false;

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}

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/**

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* Set the last modified time to the current time

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*

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* @return bool Success status

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*/

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public function touch() {

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

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if ($data !== false) {

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

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

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return $this->cache->expire($this->name, $this->ttl);

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}

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return $return;

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}

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return false;

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}

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/**

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* Remove the cache

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*

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* @return bool Success status

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*/

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public function unlink() {

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

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}

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}

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