1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (https://nette.org)
  5:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  6:  */
  7: 
  8: namespace Nette\Latte\Macros;
  9: 
 10: use Nette,
 11:     Nette\Latte;
 12: 
 13: 
 14: /**
 15:  * Macro {cache} ... {/cache}
 16:  *
 17:  * @author     David Grudl
 18:  */
 19: class CacheMacro extends Nette\Object implements Latte\IMacro
 20: {
 21:     /** @var bool */
 22:     private $used;
 23: 
 24: 
 25:     /**
 26:      * Initializes before template parsing.
 27:      * @return void
 28:      */
 29:     public function initialize()
 30:     {
 31:         $this->used = FALSE;
 32:     }
 33: 
 34: 
 35:     /**
 36:      * Finishes template parsing.
 37:      * @return array(prolog, epilog)
 38:      */
 39:     public function finalize()
 40:     {
 41:         if ($this->used) {
 42:             return array('Nette\Latte\Macros\CacheMacro::initRuntime($template, $_g);');
 43:         }
 44:     }
 45: 
 46: 
 47:     /**
 48:      * New node is found.
 49:      * @return bool
 50:      */
 51:     public function nodeOpened(Latte\MacroNode $node)
 52:     {
 53:         $this->used = TRUE;
 54:         $node->isEmpty = FALSE;
 55:         $node->openingCode = Latte\PhpWriter::using($node)
 56:             ->write('<?php if (Nette\Latte\Macros\CacheMacro::createCache($netteCacheStorage, %var, $_g->caches, %node.array?)) { ?>',
 57:                 Nette\Utils\Strings::random()
 58:             );
 59:     }
 60: 
 61: 
 62:     /**
 63:      * Node is closed.
 64:      * @return void
 65:      */
 66:     public function nodeClosed(Latte\MacroNode $node)
 67:     {
 68:         $node->closingCode = '<?php $_l->tmp = array_pop($_g->caches); if (!$_l->tmp instanceof stdClass) $_l->tmp->end(); } ?>';
 69:     }
 70: 
 71: 
 72:     /********************* run-time helpers ****************d*g**/
 73: 
 74: 
 75:     /**
 76:      * @return void
 77:      */
 78:     public static function initRuntime(Nette\Templating\FileTemplate $template, \stdClass $global)
 79:     {
 80:         if (!empty($global->caches)) {
 81:             end($global->caches)->dependencies[Nette\Caching\Cache::FILES][] = $template->getFile();
 82:         }
 83:     }
 84: 
 85: 
 86:     /**
 87:      * Starts the output cache. Returns Nette\Caching\OutputHelper object if buffering was started.
 88:      * @param  Nette\Caching\IStorage
 89:      * @param  string
 90:      * @param  Nette\Caching\OutputHelper[]
 91:      * @param  array
 92:      * @return Nette\Caching\OutputHelper
 93:      */
 94:     public static function createCache(Nette\Caching\IStorage $cacheStorage, $key, & $parents, array $args = NULL)
 95:     {
 96:         if ($args) {
 97:             if (array_key_exists('if', $args) && !$args['if']) {
 98:                 return $parents[] = new \stdClass;
 99:             }
100:             $key = array_merge(array($key), array_intersect_key($args, range(0, count($args))));
101:         }
102:         if ($parents) {
103:             end($parents)->dependencies[Nette\Caching\Cache::ITEMS][] = $key;
104:         }
105: 
106:         $cache = new Nette\Caching\Cache($cacheStorage, 'Nette.Templating.Cache');
107:         if ($helper = $cache->start($key)) {
108:             if (isset($args['expire'])) {
109:                 $args['expiration'] = $args['expire']; // back compatibility
110:             }
111:             $helper->dependencies = array(
112:                 Nette\Caching\Cache::TAGS => isset($args['tags']) ? $args['tags'] : NULL,
113:                 Nette\Caching\Cache::EXPIRATION => isset($args['expiration']) ? $args['expiration'] : '+ 7 days',
114:             );
115:             $parents[] = $helper;
116:         }
117:         return $helper;
118:     }
119: 
120: }
121: