<?php
/**
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         3.0.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\Routing\Route;

use Cake\Routing\Route\Route;
use Cake\Utility\Inflector;

/**
 * This route class will transparently inflect the controller, action and plugin
 * routing parameters, so that requesting `/my-plugin/my-controller/my-action`
 * is parsed as `['plugin' => 'MyPlugin', 'controller' => 'MyController', 'action' => 'myAction']`
 */
class DashedRoute extends Route
{

    /**
     * Flag for tracking whether or not the defaults have been inflected.
     *
     * Default values need to be inflected so that they match the inflections that
     * match() will create.
     *
     * @var bool
     */
    protected $_inflectedDefaults = false;

    /**
     * Parses a string URL into an array. If it matches, it will convert the
     * controller and plugin keys to their CamelCased form and action key to
     * camelBacked form.
     *
     * @param string $url The URL to parse
     * @return bool|array False on failure, or an array of request parameters
     */
    public function parse($url)
    {
        $params = parent::parse($url);
        if (!$params) {
            return false;
        }
        if (!empty($params['controller'])) {
            $params['controller'] = Inflector::camelize(str_replace(
                '-',
                '_',
                $params['controller']
            ));
        }
        if (!empty($params['plugin'])) {
            $params['plugin'] = Inflector::camelize(str_replace(
                '-',
                '_',
                $params['plugin']
            ));
        }
        if (!empty($params['action'])) {
            $params['action'] = Inflector::variable(str_replace(
                '-',
                '_',
                $params['action']
            ));
        }
        return $params;
    }

    /**
     * Dasherizes the controller, action and plugin params before passing them on
     * to the parent class.
     *
     * @param array $url Array of parameters to convert to a string.
     * @param array $context An array of the current request context.
     *   Contains information such as the current host, scheme, port, and base
     *   directory.
     * @return bool|string Either false or a string URL.
     */
    public function match(array $url, array $context = [])
    {
        $url = $this->_dasherize($url);
        if (!$this->_inflectedDefaults) {
            $this->_inflectedDefaults = true;
            $this->defaults = $this->_dasherize($this->defaults);
        }
        return parent::match($url, $context);
    }

    /**
     * Helper method for dasherizing keys in a URL array.
     *
     * @param array $url An array of URL keys.
     * @return array
     */
    protected function _dasherize($url)
    {
        foreach (['controller', 'plugin', 'action'] as $element) {
            if (!empty($url[$element])) {
                $url[$element] = Inflector::dasherize($url[$element]);
            }
        }
        return $url;
    }
}
