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<?php
namespace Core\Modules\Cache\Adapters;
use Core;
use Core\Modules\DB\Query;
class Database implements Core\Modules\Cache\Interfaces\Adapter
{
private $tableName;
private $fields;
public function __construct()
{
$this->tableName = Core\Config()->CACHE['database']['table_name'];
$this->fields = Core\Config()->CACHE['database']['fields'];
}
public function store($key, $value, $expire = 0)
{
if ($expire) {
$expire = time() + $expire;
}
$value = serialize($value);
$query = new Query();
$exists = $query
->select('all')
->from($this->tableName)
->where("{$this->fields[0]} = ?", array(md5($key)))
->first();
if (is_null($exists)) {
$insert = $query
->insert($this->fields, array(md5($key), $value, $expire))
->into($this->tableName);
return Core\DB()->run($insert);
} else {
$update = $query
->update($this->tableName)
->set($this->fields, array(md5($key), $value, $expire))
->where("{$this->fields[0]} = ?", array(md5($key)));
return Core\DB()->run($update);
}
}
public function fetch($key)
{
$query = new Query();
$query = $query
->select('all')
->from($this->tableName)
->where("{$this->fields[0]} = ?", array(md5($key)));
$result = $query->first();
if (is_null($result)) {
return null;
}
list(, $value, $expire) = array_values($result);
if ($expire && $expire < time()) {
$query->remove()->run();
return null;
}
return unserialize($value);
}
public function exists($key)
{
$query = new Query();
$exists = $query
->select('all')
->from($this->tableName)
->where("{$this->fields[0]} = ?", array(md5($key)))
->exists();
return $exists;
}
public function remove($key)
{
$query = new Query();
$query = $query
->select('all')
->from($this->tableName)
->where("{$this->fields[0]} = ?", array(md5($key)));
if ($query->exists()) {
$query->remove()->run();
return true;
} else {
return false;
}
}
}