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<?php
/**
* This file is part of RSS-Bridge, a PHP project capable of generating RSS and
* Atom feeds for websites that don't have one.
*
* For the full license information, please view the UNLICENSE file distributed
* with this source code.
*
* @package Core
* @license http://unlicense.org/ UNLICENSE
* @link https://github.com/rss-bridge/rss-bridge
*/
class CacheFactory
{
private $folder;
private $cacheNames;
public function __construct(string $folder = PATH_LIB_CACHES)
{
$this->folder = $folder;
// create cache names
foreach(scandir($this->folder) as $file) {
if(preg_match('/^([^.]+)Cache\.php$/U', $file, $m)) {
$this->cacheNames[] = $m[1];
}
}
}
/**
* @param string $name The name of the cache e.g. "File", "Memcached" or "SQLite"
*/
public function create(string $name): CacheInterface
{
$name = $this->sanitizeCacheName($name) . 'Cache';
if(! preg_match('/^[A-Z][a-zA-Z0-9-]*$/', $name)) {
throw new \InvalidArgumentException('Cache name invalid!');
}
$filePath = $this->folder . $name . '.php';
if(!file_exists($filePath)) {
throw new \Exception('Invalid cache');
}
$className = '\\' . $name;
return new $className();
}
protected function sanitizeCacheName(string $name)
{
// Trim trailing '.php' if exists
if (preg_match('/(.+)(?:\.php)/', $name, $matches)) {
$name = $matches[1];
}
// Trim trailing 'Cache' if exists
if (preg_match('/(.+)(?:Cache)$/i', $name, $matches)) {
$name = $matches[1];
}
if(in_array(strtolower($name), array_map('strtolower', $this->cacheNames))) {
$index = array_search(strtolower($name), array_map('strtolower', $this->cacheNames));
return $this->cacheNames[$index];
}
return null;
}
}
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