forked from blallo/rss-bridge
0998cbde9d
The function 'prepare' previously implemented in CacheAbstract is specifically required for FileCache and thus belongs to FileCache. Since this change removes all code from CacheAbstract, it can be removed completely.
111 lines
2.5 KiB
PHP
111 lines
2.5 KiB
PHP
<?php
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/**
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* Cache with file system
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*/
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class FileCache implements CacheInterface {
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protected $param;
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public function loadData(){
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$this->isPrepareCache();
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$datas = unserialize(file_get_contents($this->getCacheFile()));
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return $datas;
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}
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public function saveData($datas){
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$this->isPrepareCache();
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$writeStream = file_put_contents($this->getCacheFile(), serialize($datas));
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if(!$writeStream) {
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throw new \Exception("Cannot write the cache... Do you have the right permissions ?");
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}
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return $this;
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}
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public function getTime(){
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$this->isPrepareCache();
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$cacheFile = $this->getCacheFile();
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if(file_exists($cacheFile)){
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return filemtime($cacheFile);
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}
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return false;
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}
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public function purgeCache(){
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$cacheTimeLimit = time() - 86400; // 86400 -> 24h
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$cachePath = $this->getCachePath();
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if(file_exists($cachePath)){
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$cacheIterator = new RecursiveIteratorIterator(
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new RecursiveDirectoryIterator($cachePath),
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RecursiveIteratorIterator::CHILD_FIRST
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);
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foreach($cacheIterator as $cacheFile){
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if(in_array($cacheFile->getBasename(), array('.', '..')))
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continue;
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elseif($cacheFile->isFile()){
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if(filemtime($cacheFile->getPathname()) < $cacheTimeLimit)
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unlink($cacheFile->getPathname());
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}
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}
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}
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}
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public function prepare(array $param){
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$this->param = $param;
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return $this;
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}
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/**
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* Cache is prepared ?
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* Note : Cache name is based on request information, then cache must be prepare before use
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* @return \Exception|true
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*/
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protected function isPrepareCache(){
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if(is_null($this->param)){
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throw new \Exception('Please feed "prepare" method before try to load');
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}
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return true;
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}
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/**
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* Return cache path (and create if not exist)
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* @return string Cache path
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*/
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protected function getCachePath(){
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$cacheDir = __DIR__ . '/../cache/'; // FIXME : configuration ?
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if(!is_dir($cacheDir)){
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mkdir($cacheDir, 0755, true);
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chmod($cacheDir, 0755);
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}
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return $cacheDir;
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}
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/**
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* Get the file name use for cache store
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* @return string Path to the file cache
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*/
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protected function getCacheFile(){
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return $this->getCachePath() . $this->getCacheName();
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}
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/**
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* Determines file name for store the cache
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* return string
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*/
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protected function getCacheName(){
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$this->isPrepareCache();
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$stringToEncode = $_SERVER['REQUEST_URI'] . http_build_query($this->param);
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$stringToEncode = preg_replace('/(\?|&)format=[^&]*/i', '$1', $stringToEncode);
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return hash('sha1', $stringToEncode) . '.cache';
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}
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}
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