<?php
/**
 * Wrapper for Memcache, v. 0.4
 *
 * Modified by: Chris Thompson (http://www.thompsonbd.com)
 * By Jiri Kupiainen (http://jirikupiainen.com/)
 *
 * You are free to do whatever you please with this code. Enjoy.
 */
class CakeMemcache {
    var $_connected = false;
    var $_Memcache = null;
    var $servers = array(); // you can add more servers by adding their hostname and port to this array. if port is default (11211), it can be omitted.

    /**
     * Connect to the memcached server(s)
     */
    //function _connect() {
    function CakeMemcache() {
        if (defined('DISABLE_CACHE')) {
			return false;
		}
        
		$this->servers = array(
			'127.0.0.1'
		);

        $this->_Memcache =& new Memcache();

        // several servers - use addServer
        foreach ($this->servers as $server) {
            $parts = explode(':', $server);
            $host = $parts[0];
            $port = ((isset($parts[1])) ? $parts[1] : 11211); // default port

            if ($this->_Memcache->addServer($host, $port)) {
				$this->_connected = true;
			}
        }

        return $this->_connected;
    }
    
    //  this is used exclusively by the set method to keep a list of keys that we have going
    //  ------------------------------------------------------------------------------------
    private function register_key($key) {
//        debug('setting key');
        
        $register = $this->get('register');
        
        $register[$key] = date('Y-m-d H:m:s');
        
        $this->_Memcache->set('register', $register, 0, 0);        
    }
    
    private function unregister_key($key) {
        $register = $this->get('register');
        
        if(isset($register[$key])) {
            unset($register[$key]);
        }
        
        $this->_Memcache->set('register', $register, 0, 0);
    }
    
    //  basicly a var_dump for memcache
    //  -------------------------------
    function debug() {
        $register = $this->get('register');
        
        foreach($register as $key => $value) {
            $dumpArray[$key] = $this->get($key);
        }
        
        debug($dumpArray);       
    }
    
    //  will dump a list of registered keys
    //  -----------------------------------
    function register_list() {
        $register = $this->get('register');
        
//        debug($register);exit;
        
        foreach($register as $key => $value) {
            $dumpArray[] = $key;
        }
        
        debug($dumpArray);       
    }
    
    function use_cache($controller,$key) {        
        //  check if this is cached
        //  -----------------------
        if($this->get($key) === false || !isset($controller->caching) || $controller->caching === false) {
            return false;
        } else {
            return $this->get($key);    
        }
    }

    /**
     * Set a value in the cache
     *
     * Expiration time is one hour if not set
     */
    function set($key, $var, $expires = false) {
        if (defined('DISABLE_CACHE') || !$this->_connected) {
		    return false;
	    }

        if (!is_numeric($expires)) {
		    $expires = strtotime($expires);
	    }
        
        //  check if we want to cache for ever
        //  ----------------------------------
        if(!$expires) {
            $expires = 0;    
        } else {
            $expires = time()+$expires;
        }
        
        $this->register_key($key);

        return $this->_Memcache->set($key, $var, 0, $expires);
    }

    /**
     * Get a value from cache
     */
    function get($key) {
        if (defined('DISABLE_CACHE') || !$this->_connected) {
		    return false;
	    }

        return $this->_Memcache->get($key);
    }

    /**
     * Remove value from cache
     */
    function delete($key) {
        if (defined('DISABLE_CACHE') || !$this->_connected) {
		    return false;
	    }
        
        $this->unregister_key($key);

        return $this->_Memcache->delete($key);
    }
    
    function getExtendedStats() {
        debug($this->_Memcache->getExtendedStats());exit;
    }
}
?>