Untitled

<?php
/*
 * Limb PHP Framework
 *
 * @link http://limb-project.com
 * @copyright  Copyright &copy; 2004-2007 BIT(http://bit-creative.com)
 * @license    LGPL http://www.gnu.org/copyleft/lesser.html
 */

lmb_require_class('limb/cache2/src/lmbTaggableCache.class.php', 'lmbTaggableCache');

class lmbCacheHelper
{
  protected $_cache;
  protected $_tcache;
  protected $_mcache;
  protected $_config;
  protected $_prefix;

  function __construct(lmbCacheAbstractConnection $cache_connection, $config, $prefix = '')
  {
    $this->_cache = $cache_connection;
    $this->_tcahce = new lmbTaggableCache($this->_cache);
    $this->_config = $config;
    $this->_prefix = $prefix;
  }

  function getCacheInfo($name, $vars)
  {
    if(!isset($this->_config[$name]))
      throw new lmbException('Not found info for cache "'.$name.'"!');
    $raw_info = $this->_config[$name];
    $key = 'k'.$name;
    if(isset($raw_info['vars']))
    {
      ksort($vars);
      foreach($raw_info['vars'] as $vn)
        if(isset($vars[$vn]))
          $key .= $vn.'='.$vars[$vn].';';
        else
          throw new lmbException('Not set value for var '.$vn);
    }
    $info = array();
    $info['ttl'] = $raw_info['ttl'];
    $info['tags'] = isset($raw_info['tags']) ? $raw_info['tags'] : array();
    if(isset($raw_info['tag_ids']))
      foreach($raw_info['tag_ids'] as $t => $v)
        if(isset($vars[$v]))
          $info['tags'][] = $t.'-id:'.$vars[$v];
        else
          throw new lmbException('Not set value for var '.$v);
    $info['key'] = $key.'@t:'.implode(',', $info['tags']);

    if($this->_prefix)
    {
      $info['key'] = $this->_prefix.$info['key'];
      foreach($info['tags'] as $n => $v)
        $info['tags'][$n] = $this->_prefix.$v;
    }

    return $info;
  }

  function deleteByTagsFor($obj)
  {
    if(!is_string($obj))
    {
      $table = $obj->getTableName();
      $this->_tcahce->deleteByTag($this->_prefix.$table);
      if($obj->has('id'))
        $this->_tcahce->deleteByTag($this->_prefix.$table.'-id:'.$obj->id);
    }
    else
      $this->_tcahce->deleteByTag($this->_prefix.$obj);
  }

  function flushCache()
  {
    $this->_cache->flush();
  }

  function callCache($name, $function, $params = array(), $vars = array())
  {
    $info = $this->getCacheInfo($name, $vars);
    if(null !== ($value = $this->_tcahce->get($info['key'])))
      return $value;
    $value = call_user_func_array($function, $params);
    if(!$value)
      $value = false;
    $this->_tcahce->set($info['key'], $value, $info['ttl'], $info['tags']);
    return $value;
  }
}