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<?php
/**
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik;
use Piwik\Cache as PiwikCache;
use Exception;
/**
* Caching class used for DeviceDetector caching
*
* Combines Piwik\CacheFile with an additional caching in static property
*
* Static caching speeds up multiple detections in one request, which is the case when sending bulk requests
*/
class DeviceDetectorCache implements \DeviceDetector\Cache\Cache
{
protected static $staticCache = array();
private $cache;
private $ttl;
public function __construct($ttl = 300)
{
$this->ttl = (int) $ttl;
$this->cache = PiwikCache::getEagerCache();
}
/**
* Function to fetch a cache entry
*
* @param string $id The cache entry ID
* @return array|bool False on error, or array the cache content
*/
public function fetch($id)
{
if (empty($id)) {
return false;
}
if (array_key_exists($id, self::$staticCache)) {
return self::$staticCache[$id];
}
if (!$this->cache->contains($id)) {
return false;
}
return $this->cache->fetch($id);
}
/**
* A function to store content a cache entry.
*
* @param string $id The cache entry ID
* @param array $content The cache content
* @throws \Exception
* @return bool True if the entry was succesfully stored
*/
public function save($id, $content, $ttl=0)
{
if (empty($id)) {
return false;
}
self::$staticCache[$id] = $content;
return $this->cache->save($id, $content, $this->ttl);
}
public function contains($id)
{
return !empty(self::$staticCache[$id]) && $this->cache->contains($id);
}
public function delete($id)
{
if (empty($id)) {
return false;
}
unset(self::$staticCache[$id]);
return $this->cache->delete($id);
}
public function flushAll()
{
return $this->cache->flushAll();
}
}
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