Rss-Bridge/lib/Bridge.php

<?php
require_once(__DIR__ . '/BridgeInterface.php');
class Bridge {

    static protected $dirBridge;

    public function __construct(){
        throw new \LogicException('Please use ' . __CLASS__ . '::create for new object.');
    }

    /**
    * Checks if a bridge is an instantiable bridge.
    * @param string $nameBridge name of the bridge that you want to use
    * @return true if it is an instantiable bridge, false otherwise.
    */
    static public function isInstantiable($nameBridge){
        $re = new ReflectionClass($nameBridge);
        return $re->IsInstantiable();
    }

    /**
    * Create a new bridge object
    * @param string $nameBridge Defined bridge name you want use
    * @return Bridge object dedicated
    */
    static public function create($nameBridge){
        if(!preg_match('@^[A-Z][a-zA-Z0-9-]*$@', $nameBridge)){
            $message = <<<EOD
'nameBridge' must start with one uppercase character followed or not by
alphanumeric or dash characters!
EOD;
            throw new \InvalidArgumentException($message);
        }

        $nameBridge = $nameBridge . 'Bridge';
        $pathBridge = self::getDir() . $nameBridge . '.php';

        if(!file_exists($pathBridge)){
            throw new \Exception('The bridge you looking for does not exist. It should be at path ' . $pathBridge);
        }

        require_once $pathBridge;

        if(Bridge::isInstantiable($nameBridge)){
            return new $nameBridge();
        } else {
            return false;
        }
    }

    static public function setDir($dirBridge){
        if(!is_string($dirBridge)){
            throw new \InvalidArgumentException('Dir bridge must be a string.');
        }

        if(!file_exists($dirBridge)){
            throw new \Exception('Dir bridge does not exist.');
        }

        self::$dirBridge = $dirBridge;
    }

    static public function getDir(){
        $dirBridge = self::$dirBridge;

        if(is_null($dirBridge)){
            throw new \LogicException(__CLASS__ . ' class need to know bridge path !');
        }

        return $dirBridge;
    }

    /**
    * Lists the available bridges.
    * @return array List of the bridges
    */
    static public function listBridges(){
        $pathDirBridge = self::getDir();
        $listBridge = array();
        $dirFiles = scandir($pathDirBridge);

        if($dirFiles !== false){
            foreach($dirFiles as $fileName){
                if(preg_match('@^([^.]+)Bridge\.php$@U', $fileName, $out)){
                    $listBridge[] = $out[1];
                }
            }
        }

        return $listBridge;
    }

    static public function isWhitelisted($whitelist, $name){
        if(in_array($name, $whitelist)
          or in_array($name . '.php', $whitelist)
          or in_array($name . 'Bridge', $whitelist) // DEPRECATED
          or in_array($name . 'Bridge.php', $whitelist) // DEPRECATED
          or count($whitelist) === 1 and trim($whitelist[0]) === '*'){
            return true;
        } else {
            return false;
        }
    }
}