Refonte du code

caches/FileCache.php

@@ -0,0 +1,92 @@
+<?php
+/**
+* Cache with file system
+*/
+class FileCache extends CacheAbstract{
+    protected $cacheDirCreated; // boolean to avoid always chck dir cache existance
+
+    public function loadData(){
+        $this->isPrepareCache();
+
+        $datas = json_decode(file_get_contents($this->getCacheFile()),true);
+        $items = array();
+        foreach($datas as $aData){
+            $item = new \Item();
+            foreach($aData as $name => $value){
+                $item->$name = $value;
+            }
+            $items[] = $item;
+        }
+
+        return $items;
+    }
+
+    public function saveData($datas){
+        $this->isPrepareCache();
+
+        file_put_contents($this->getCacheFile(), json_encode($datas));
+
+        return $this;
+    }
+
+    public function getTime(){
+        $this->isPrepareCache();
+
+        $cacheFile = $this->getCacheFile();
+        if( file_exists($cacheFile) ){
+            return filemtime($cacheFile);
+        }
+
+        return false;
+    }
+
+    /**
+    * Cache is prepared ?
+    * Note : Cache name is based on request information, then cache must be prepare before use
+    * @return \Exception|true
+    */
+    protected function isPrepareCache(){
+        if( is_null($this->param) ){
+            throw new \Exception('Please feed "prepare" method before try to load');
+        }
+
+        return true;
+    }
+
+    /**
+    * Return cache path (and create if not exist)
+    * @return string Cache path
+    */
+    protected function getCachePath(){
+        $cacheDir = __DIR__ . '/../cache/'; // FIXME : configuration ?
+
+        // FIXME : implement recursive dir creation
+        if( is_null($this->cacheDirCreated) && !is_dir($cacheDir) ){
+            $this->cacheDirCreated = true;
+
+            mkdir($cacheDir,0705);
+            chmod($cacheDir,0705);
+        }
+
+        return $cacheDir;
+    }
+
+    /**
+    * Get the file name use for cache store
+    * @return string Path to the file cache
+    */
+    protected function getCacheFile(){
+        return $this->getCachePath() . $this->getCacheName();
+    }
+
+    /**
+    * Determines file name for store the cache
+    * return string
+    */
+    protected function getCacheName(){
+        $this->isPrepareCache();
+
+        $stringToEncode = $_SERVER['REQUEST_URI'] . http_build_query($this->param);
+        return hash('sha1', $stringToEncode) . '.cache';
+    }
+}