rss-bridge/lib/Cache.php

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<?php
require_once(__DIR__ . '/CacheInterface.php');
class Cache {
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static protected $dirCache;
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public function __construct(){
throw new \LogicException('Please use ' . __CLASS__ . '::create for new object.');
}
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static public function create($nameCache){
if(!static::isValidNameCache($nameCache)){
throw new \InvalidArgumentException('Name cache must be at least'
. ' one uppercase follow or not by alphanumeric or dash characters.');
}
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$pathCache = self::getDir() . $nameCache . '.php';
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if(!file_exists($pathCache)){
throw new \Exception('The cache you looking for does not exist.');
}
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require_once $pathCache;
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return new $nameCache();
}
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static public function setDir($dirCache){
if(!is_string($dirCache)){
throw new \InvalidArgumentException('Dir cache must be a string.');
}
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if(!file_exists($dirCache)){
throw new \Exception('Dir cache does not exist.');
}
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self::$dirCache = $dirCache;
}
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static public function getDir(){
$dirCache = self::$dirCache;
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if(is_null($dirCache)){
throw new \LogicException(__CLASS__ . ' class need to know cache path !');
}
return $dirCache;
}
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static public function isValidNameCache($nameCache){
return preg_match('@^[A-Z][a-zA-Z0-9-]*$@', $nameCache);
}
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static public function utf8_encode_deep(&$input){
if (is_string($input)){
$input = utf8_encode($input);
} elseif(is_array($input)){
foreach($input as &$value){
Cache::utf8_encode_deep($value);
}
unset($value);
} elseif(is_object($input)){
$vars = array_keys(get_object_vars($input));
foreach($vars as $var){
Cache::utf8_encode_deep($input->$var);
}
}
}
static public function purge(){
$cacheTimeLimit = time() - 60*60*24;
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$cachePath = 'cache';
if(file_exists($cachePath)){
$cacheIterator = new RecursiveIteratorIterator(
new RecursiveDirectoryIterator($cachePath),
RecursiveIteratorIterator::CHILD_FIRST
);
foreach($cacheIterator as $cacheFile){
if(in_array($cacheFile->getBasename(), array('.', '..')))
continue;
elseif($cacheFile->isFile()){
if(filemtime($cacheFile->getPathname()) < $cacheTimeLimit)
unlink($cacheFile->getPathname());
}
}
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}
}
}