1: <?php
 2: 
 3: /**
 4:  * This file is part of the Nette Framework (https://nette.org)
 5:  * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 6:  */
 7: 
 8: namespace Nette\Caching;
 9: 
10: use Nette;
11: 
12: 
13: /**
14:  * Output caching helper.
15:  */
16: class OutputHelper
17: {
18:     use Nette\SmartObject;
19: 
20:     /** @var array */
21:     public $dependencies;
22: 
23:     /** @var Cache|null */
24:     private $cache;
25: 
26:     /** @var string */
27:     private $key;
28: 
29: 
30:     public function __construct(Cache $cache, $key)
31:     {
32:         $this->cache = $cache;
33:         $this->key = $key;
34:         ob_start();
35:     }
36: 
37: 
38:     /**
39:      * Stops and saves the cache.
40:      * @return void
41:      */
42:     public function end(array $dependencies = null)
43:     {
44:         if ($this->cache === null) {
45:             throw new Nette\InvalidStateException('Output cache has already been saved.');
46:         }
47:         $this->cache->save($this->key, ob_get_flush(), (array) $dependencies + (array) $this->dependencies);
48:         $this->cache = null;
49:     }
50: }
51: