manifest.php
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<?php
N2Loader::import('libraries.cache.cache');
class N2CacheManifest extends N2Cache {
private $isRaw = false;
private $manifestData;
public function __construct($group, $isAccessible = false, $isRaw = false) {
parent::__construct($group, $isAccessible);
$this->isRaw = $isRaw;
}
public function makeCache($fileName, $hash, $callable) {
if (!$this->isCached($fileName, $hash)) {
$return = call_user_func($callable, $this);
if ($return === false) {
return false;
}
return $this->createCacheFile($fileName, $hash, $return);
}
if ($this->isAccessible) {
return $this->getPath($fileName);
}
return json_decode($this->get($fileName), true);
}
private function isCached($fileName, $hash) {
$manifestKey = $this->getManifestKey($fileName);
if ($this->exists($manifestKey)) {
$this->manifestData = json_decode($this->get($manifestKey), true);
if (!$this->isCacheValid($this->manifestData) || $this->manifestData['hash'] != $hash) {
$this->clean($fileName);
return false;
}
return true;
}
return false;
}
protected function createCacheFile($fileName, $hash, $content) {
$this->manifestData = array();
$this->manifestData['hash'] = $hash;
$this->addManifestData($this->manifestData);
$this->set($this->getManifestKey($fileName), json_encode($this->manifestData));
$this->set($fileName, $this->isRaw ? $content : json_encode($content));
if ($this->isAccessible) {
return $this->getPath($fileName);
}
return $content;
}
protected function isCacheValid(&$manifestData) {
return true;
}
protected function addManifestData(&$manifestData) {
}
public function clean($fileName) {
$this->remove($this->getManifestKey($fileName));
$this->remove($fileName);
}
protected function getManifestKey($fileName) {
return $fileName . '.manifest';
}
public function getData($key, $default = 0) {
return isset($this->manifestData[$key]) ? $this->manifestData[$key] : $default;
}
}