85 lines
No EOL
2 KiB
PHP
85 lines
No EOL
2 KiB
PHP
<?php
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namespace System\Models;
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class WriteCache extends Write
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{
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/**
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* Validates, if the cache is valid or invalid and has to be refreshed
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* @param int $duration how many seconds the cache is valid.
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* @return boolean for an invalid cache (false) and for a valid cache (true).
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*/
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public function validate($folderName, $fileName, $duration)
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{
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if(isset($_SERVER['HTTP_CACHE_CONTROL']) && $_SERVER['HTTP_CACHE_CONTROL'] == 'max-age=0')
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{
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return false;
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}
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if(!$this->checkPath($folderName))
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{
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return false;
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}
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if(!$this->checkFile($folderName, $fileName))
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{
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$this->writeFile($folderName, $fileName, time());
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return false;
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}
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$lastRefresh = file_get_contents($folderName . DIRECTORY_SEPARATOR . $fileName);
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if(time() - $lastRefresh > $duration)
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{
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return false;
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}
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return true;
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}
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/**
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* Updates a cache file.
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* Serializes an object and writes it to the cache file together with a file that holds the last refresh time.
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* @param object $cacheData has to be an object (e.g. navigation object).
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* @param string $cacheFile has to be the name of the file you want to update (in case there are more than one cache files.
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*/
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public function updateCache($folderName, $cacheFileName, $requestFileName, $cacheData)
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{
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$sCacheData = serialize($cacheData);
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$this->writeFile($folderName, $cacheFileName, $sCacheData);
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if($requestFileName)
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{
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$this->writeFile($folderName, $requestFileName, time());
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}
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}
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/**
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* Get the recent cache.
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* Takes a filename, gets the file and unserializes the cache into an object.
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* @param string $fileName is the name of the cache file.
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*/
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public function getCache($folderName, $cacheFileName)
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{
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$sCacheData = $this->getFile($folderName, $cacheFileName);
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if($sCacheData)
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{
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return unserialize($sCacheData);
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}
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return false;
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}
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/**
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* @todo Create a function to clear a specific cache file
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*/
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public function clearCache($name)
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{
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}
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/**
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* @todo Create a function to clear all cache files
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*/
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public function clearAllCacheFiles()
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{
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}
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}
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?>
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