1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  *
  6:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  * @package Nette\Templates
 11:  */
 12: 
 13: 
 14: 
 15: /**
 16:  * Caching template helper.
 17:  *
 18:  * @author     David Grudl
 19:  * @package Nette\Templates
 20:  */
 21: class NCachingHelper extends NObject
 22: {
 23:     /** @var array */
 24:     private $frame;
 25: 
 26:     /** @var string */
 27:     private $key;
 28: 
 29: 
 30: 
 31:     /**
 32:      * Starts the output cache. Returns CachingHelper object if buffering was started.
 33:      * @param  string
 34:      * @param  string
 35:      * @param  array
 36:      * @return NCachingHelper
 37:      */
 38:     public static function create($key, $file, $tags)
 39:     {
 40:         $cache = self::getCache();
 41:         if (isset($cache[$key])) {
 42:             echo $cache[$key];
 43:             return FALSE;
 44: 
 45:         } else {
 46:             $obj = new self;
 47:             $obj->key = $key;
 48:             $obj->frame = array(
 49:                 NCache::FILES => array($file),
 50:                 NCache::TAGS => $tags,
 51:                 NCache::EXPIRATION => rand(86400 * 4, 86400 * 7),
 52:             );
 53:             ob_start();
 54:             return $obj;
 55:         }
 56:     }
 57: 
 58: 
 59: 
 60:     /**
 61:      * Stops and saves the cache.
 62:      * @return void
 63:      */
 64:     public function save()
 65:     {
 66:         $this->getCache()->save($this->key, ob_get_flush(), $this->frame);
 67:         $this->key = $this->frame = NULL;
 68:     }
 69: 
 70: 
 71: 
 72:     /**
 73:      * Adds the file dependency.
 74:      * @param  string
 75:      * @return void
 76:      */
 77:     public function addFile($file)
 78:     {
 79:         $this->frame[NCache::FILES][] = $file;
 80:     }
 81: 
 82: 
 83: 
 84:     /**
 85:      * Adds the cached item dependency.
 86:      * @param  string
 87:      * @return void
 88:      */
 89:     public function addItem($item)
 90:     {
 91:         $this->frame[NCache::ITEMS][] = $item;
 92:     }
 93: 
 94: 
 95: 
 96:     /********************* backend ****************d*g**/
 97: 
 98: 
 99: 
100:     /**
101:      * @return NCache
102:      */
103:     protected static function getCache()
104:     {
105:         return NEnvironment::getCache('Nette.Template.Curly');
106:     }
107: 
108: }
109: