/**
* Starts the output cache. Returns NCachingHelper object if buffering was started.
* @param ICacheStorage
* @param string
* @param NCachingHelper[]
* @param array
* @return NCachingHelper
*/
public static function createCache(ICacheStorage $cacheStorage, $key, & $parents, array $args = NULL)
{
if ($args) {
if (array_key_exists('if', $args) && !$args['if']) {
return $parents[] = new stdClass;
}
$key = array_merge(array($key), array_intersect_key($args, range(0, count($args))));
}
if ($parents) {
end($parents)->dependencies[NCache::ITEMS][] = $key;
}
$cache = new NCache($cacheStorage, 'Nette.Templating.Cache');
if ($helper = $cache->start($key)) {
if (isset($args['expire'])) {
$args['expiration'] = $args['expire']; // back compatibility
}
$helper->dependencies = array(
NCache::TAGS => isset($args['tags']) ? $args['tags'] : NULL,
NCache::EXPIRATION => isset($args['expiration']) ? $args['expiration'] : '+ 7 days',
);
$parents[] = $helper;
}
return $helper;
}
