<?php

class MemcachedTimer extends ArrayTimer {
	
	private $prefix = '', $cache = null, $period = 60, $min = 0;
	
	public function setPrefix ( $prefix ) {
		
		$this->cache = new Memcached();
		$this->prefix = $prefix;
		
		return $this;
		
	}
	
	public function sleepSkip ( $id ) {
		
		$skip = !$this->sleepTime($id);
		
		if ( $skip )
			$this->update($id);
		
		return $skip;
		
	}
	
	public function offsetGet ( $id ) {
		
		$value = $this->memcached->get($this->prefix . $id);
		
		if ( $value === false && $this->memcached->getResultCode() === Memcached::RES_NOTFOUND )
			$value = $this[$id] = time() - $this->period;
		
		parent::offsetSet($value);
		
		return $value;
		
	}
	
	public function offsetSet ( $id, $value ) {
		
		if ( $this->memcached->set($this->prefix . $id, $value) ) {
			
			parent::offsetSet($id, $value);
			
			return $value;
			
		}
		
		throw new Exception('Memcached error ! Cannot set value !');
		
	}
	
	public function offsetUnset ( $id ) {
		
		parent::offsetUnset($id);
		
		$this->memcached->delete($this->prefix . $id);
		
	}
	
	public function offsetExists ( $id ) {
		
		$value = $this->memcached->get($this->prefix . $id);
		
		if ( $value === false && $this->memcached->getResultCode() === Memcached::RES_NOTFOUND )
			return false;
		
		return true;
		
	}
	
}

?>