<?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;

/**
 * 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 $controller A short notation controller (a:b:c)
     *
     * @return string A string with class::method
     *
     * @throws \InvalidArgumentException when the specified bundle is not enabled
     *                                   or the controller cannot be found
     */
    public function parse($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;
        $controller = str_replace('/', '\\', $controller);
        $bundles = array();

        // this throws an exception if there is no such bundle
        foreach ($this->kernel->getBundle($bundle, false) as $b) {
            $try = $b->getNamespace().'\\Controller\\'.$controller.'Controller';
            if (class_exists($try)) {
                return $try.'::'.$action.'Action';
            }

            $bundles[] = $b->getName();
            $msg = sprintf('Unable to find controller "%s:%s" - class "%s" does not exist.', $bundle, $controller, $try);
        }

        if (count($bundles) > 1) {
            $msg = sprintf('Unable to find controller "%s:%s" in bundles %s.', $bundle, $controller, implode(', ', $bundles));
        }

        throw new \InvalidArgumentException($msg);
    }

    public function build($controller) {
        if (2 != count($parts = explode('::', $controller))) {
            throw new \InvalidArgumentException(sprintf('The "%s" controller is not a valid aController::cAction controller string.', $controller));
        }

        list ($className, $action) = $parts;
        if (5 !== strripos($action, 'Action')) {
            throw new \InvalidArgumentException(sprintf('The "%s" controller is not a valid aController::cAction controller string.', $controller));
        }
        $action = substr($action, 0, strlen($action) - 6);

        foreach ($this->kernel->getBundles() as $bundles) {
            foreach($bundles as $bundle) {
                if (preg_match('/^'.preg_quote($bundle->getNamespace()).'\\\\Controller\\\\(.*)Controller/', $className, $m)) {
                    return sprintf('%s:%s:%s', $bundle->getName(), $m[1], $action);
                }
            }
        }

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