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:  */
 11: 
 12: namespace Nette\Templates;
 13: 
 14: use Nette,
 15:     Nette\Environment,
 16:     Nette\Caching\Cache;
 17: 
 18: 
 19: 
 20: /**
 21:  * Caching template helper.
 22:  *
 23:  * @author     David Grudl
 24:  */
 25: class CachingHelper extends Nette\Object
 26: {
 27:     /** @var array */
 28:     private $frame;
 29: 
 30:     /** @var string */
 31:     private $key;
 32: 
 33: 
 34: 
 35:     /**
 36:      * Starts the output cache. Returns CachingHelper object if buffering was started.
 37:      * @param  string
 38:      * @param  string
 39:      * @param  array
 40:      * @return CachingHelper
 41:      */
 42:     public static function create($key, $file, $tags)
 43:     {
 44:         $cache = self::getCache();
 45:         if (isset($cache[$key])) {
 46:             echo $cache[$key];
 47:             return FALSE;
 48: 
 49:         } else {
 50:             $obj = new self;
 51:             $obj->key = $key;
 52:             $obj->frame = array(
 53:                 Cache::FILES => array($file),
 54:                 Cache::TAGS => $tags,
 55:                 Cache::EXPIRATION => rand(86400 * 4, 86400 * 7),
 56:             );
 57:             ob_start();
 58:             return $obj;
 59:         }
 60:     }
 61: 
 62: 
 63: 
 64:     /**
 65:      * Stops and saves the cache.
 66:      * @return void
 67:      */
 68:     public function save()
 69:     {
 70:         $this->getCache()->save($this->key, ob_get_flush(), $this->frame);
 71:         $this->key = $this->frame = NULL;
 72:     }
 73: 
 74: 
 75: 
 76:     /**
 77:      * Adds the file dependency.
 78:      * @param  string
 79:      * @return void
 80:      */
 81:     public function addFile($file)
 82:     {
 83:         $this->frame[Cache::FILES][] = $file;
 84:     }
 85: 
 86: 
 87: 
 88:     /**
 89:      * Adds the cached item dependency.
 90:      * @param  string
 91:      * @return void
 92:      */
 93:     public function addItem($item)
 94:     {
 95:         $this->frame[Cache::ITEMS][] = $item;
 96:     }
 97: 
 98: 
 99: 
100:     /********************* backend ****************d*g**/
101: 
102: 
103: 
104:     /**
105:      * @return Nette\Caching\Cache
106:      */
107:     protected static function getCache()
108:     {
109:         return Environment::getCache('Nette.Template.Curly');
110:     }
111: 
112: }
113: