<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Symfony\Bundle\FrameworkBundle\Controller;

use Symfony\Component\HttpKernel\KernelInterface;

use Symfony\Component\HttpKernel\Log\LoggerInterface;

/**

 * ControllerNameParser converts controller from the short notation a:b:c

 * (BlogBundle:Post:index) to a fully-qualified class::method string

 * (Bundle\BlogBundle\Controller\PostController::indexAction).

 *

 * @author Fabien Potencier <fabien@symfony.com>

 */

class ControllerNameParser

{

    protected $kernel;

    /**

     * Constructor.

     *

     * @param KernelInterface $kernel A KernelInterface instance

     */

    public function __construct(KernelInterface $kernel)

    {

        $this->kernel = $kernel;

    }

    /**

     * Converts a short notation a:b:c to a class::method.

     *

     * @param string $controller A short notation controller (a:b:c)

     *

     * @param string A controller (class::method)

     */

    public function parse($controller)

    {

        if (3 != count($parts = explode(':', $controller))) {

            throw new \InvalidArgumentException(sprintf('The "%s" controller is not a valid a:b:c controller string.', $controller));

        }

        list($bundle, $controller, $action) = $parts;

        $class = null;

        $logs = array();

        foreach ($this->kernel->getBundle($bundle, false) as $b) {

            $try = $b->getNamespace().'\\Controller\\'.$controller.'Controller';

            if (!class_exists($try)) {

                $logs[] = sprintf('Unable to find controller "%s:%s" - class "%s" does not exist.', $bundle, $controller, $try);

            } else {

                $class = $try;

                break;

            }

        }

        if (null === $class) {

            $this->handleControllerNotFoundException($bundle, $controller, $logs);

        }

        return $class.'::'.$action.'Action';

    }

    private function handleControllerNotFoundException($bundle, $controller, array $logs)

    {

        // just one log, return it as the exception

        if (1 == count($logs)) {

            throw new \InvalidArgumentException($logs[0]);

        }

        // many logs, use a message that mentions each searched bundle

        $names = array();

        foreach ($this->kernel->getBundle($bundle, false) as $b) {

            $names[] = $b->getName();

        }

        $msg = sprintf('Unable to find controller "%s:%s" in bundles %s.', $bundle, $controller, implode(', ', $names));

        throw new \InvalidArgumentException($msg);

    }

}