DAOSerialCache.php

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<?php
 
namespace Ubiquity\cache\dao;
 
use Ubiquity\cache\CacheManager;
use Ubiquity\contents\serializers\SerializerInterface;
use Ubiquity\contents\serializers\PhpSerializer;
use Ubiquity\cache\system\AbstractDataCache;
use Ubiquity\cache\system\ArrayCache;
 
class DAOSerialCache extends AbstractDAOCache {
 
    protected $serializer;
 
    protected $cache;
 
    protected function getKey($class, $key) {
        return \md5 ( $class . $key );
    }
 
    public function __construct($cacheSystem = ArrayCache::class, $serializer = PhpSerializer::class) {
        if (\is_string ( $cacheSystem )) {
            $this->cache = new $cacheSystem ( CacheManager::getCacheSubDirectory ( 'objects' ), '.object' );
        } else {
            $this->cache = $cacheSystem;
        }
        $this->serializer = new $serializer ();
    }
 
    public function store($class, $key, $object) {
        $this->cache->store ( $this->getKey ( $class, $key ), $this->serializer->serialize ( $object ) );
    }
 
    public function fetch($class, $key) {
        $result = $this->cache->fetch ( $this->getKey ( $class, $key ) );
        if ($result) {
            return $this->serializer->unserialize ( $result );
        }
        return false;
    }
 
    public function delete($class, $key) {
        $key = $this->getKey ( $class, $key );
        if ($this->cache->exists ( $key )) {
            return $this->cache->remove ( $key );
        }
        return false;
    }
}