/**
* @param $checksum
*
* @return bool|mixed
*/
protected function isCacheExpired($checksum)
{
if (!$this->cache->doesCacheExist($checksum)) {
return true;
}
if ($expired = $this->cache->isCacheExpired($checksum)) {
$files_changed = false;
if ($file_group = $this->file_info_cache->get($checksum . '_fileinfo')) {
$file_group = unserialize($file_group);
/** @var $file RokBooster_Compressor_File */
foreach ($file_group as $file) {
if (file_exists($file->getPath()) && is_readable($file->getPath())) {
if ($file->hasChanged()) {
$files_changed = true;
break;
}
} else {
$this->file_info_cache->remove($checksum . '_fileinfo');
$files_changed = true;
break;
}
}
} else {
$files_changed = true;
}
if (!$files_changed) {
$this->cache->setCacheAsValid($checksum);
return false;
}
}
return $expired;
}
