<?php

(defined('BASEPATH')) OR exit('No direct script access allowed');

/* load the MX core module class */
require dirname(__FILE__) . '/Modules.php';

/**
 * Modular Extensions - HMVC
 *
 * Adapted from the CodeIgniter Core Classes
 * @link	http://codeigniter.com
 *
 * Description:
 * This library extends the CodeIgniter router class.
 *
 * Install this file as application/third_party/MX/Router.php
 *
 * @copyright	Copyright (c) 2015 Wiredesignz
 * @version 	5.5
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * */
class MX_Router extends CI_Router {

    public $module;
    private $located = 0;

    public function fetch_module() {
        return $this->module;
    }

    protected function _set_request($segments = array()) {
        if ($this->translate_uri_dashes === TRUE) {
            foreach (range(0, 2) as $v) {
                isset($segments[$v]) && $segments[$v] = str_replace('-', '_', $segments[$v]);
            }
        }

        $segments = $this->locate($segments);

        if ($this->located == -1) {
            $this->_set_404override_controller();
            return;
        }

        if (empty($segments)) {
            $this->_set_default_controller();
            return;
        }

        $this->set_class($segments[0]);

        if (isset($segments[1])) {
            $this->set_method($segments[1]);
        } else {
            $segments[1] = 'index';
        }

        array_unshift($segments, NULL);
        unset($segments[0]);
        $this->uri->rsegments = $segments;
    }

    protected function _set_404override_controller() {
        $this->_set_module_path($this->routes['404_override']);
    }

    protected function _set_default_controller() {
        if (empty($this->directory)) {
            /* set the default controller module path */
            $this->_set_module_path($this->default_controller);
        }

        parent::_set_default_controller();

        if (empty($this->class)) {
            $this->_set_404override_controller();
        }
    }

    /** Locate the controller * */
    public function locate($segments) {
        $this->located = 0;
        $ext = $this->config->item('controller_suffix') . EXT;

        /* use module route if available */
        if (isset($segments[0]) && $routes = Modules::parse_routes($segments[0], implode('/', $segments))) {
            $segments = $routes;
        }

        /* get the segments array elements */
        list($module, $directory, $controller) = array_pad($segments, 3, NULL);

        /* check modules */
        foreach (Modules::$locations as $location => $offset) {
            /* module exists? */
            if (is_dir($source = $location . $module . '/controllers/')) {
                $this->module = $module;
                $this->directory = $offset . $module . '/controllers/';

                /* module sub-controller exists? */
                if ($directory) {
                    /* module sub-directory exists? */
                    if (is_dir($source . $directory . '/')) {
                        $source .= $directory . '/';
                        $this->directory .= $directory . '/';

                        /* module sub-directory controller exists? */
                        if ($controller) {
                            if (is_file($source . ucfirst($controller) . $ext)) {
                                $this->located = 3;
                                return array_slice($segments, 2);
                            } else
                                $this->located = -1;
                        }
                    }
                    else
                    if (is_file($source . ucfirst($directory) . $ext)) {
                        $this->located = 2;
                        return array_slice($segments, 1);
                    } else
                        $this->located = -1;
                }

                /* module controller exists? */
                if (is_file($source . ucfirst($module) . $ext)) {
                    $this->located = 1;
                    return $segments;
                }
            }
        }

        if (!empty($this->directory))
            return;

        /* application sub-directory controller exists? */
        if ($directory) {
            if (is_file(APPPATH . 'controllers/' . $module . '/' . ucfirst($directory) . $ext)) {
                $this->directory = $module . '/';
                return array_slice($segments, 1);
            }

            /* application sub-sub-directory controller exists? */
            if ($controller) {
                if (is_file(APPPATH . 'controllers/' . $module . '/' . $directory . '/' . ucfirst($controller) . $ext)) {
                    $this->directory = $module . '/' . $directory . '/';
                    return array_slice($segments, 2);
                }
            }
        }

        /* application controllers sub-directory exists? */
        if (is_dir(APPPATH . 'controllers/' . $module . '/')) {
            $this->directory = $module . '/';
            return array_slice($segments, 1);
        }

        /* application controller exists? */
        if (is_file(APPPATH . 'controllers/' . ucfirst($module) . $ext)) {
            return $segments;
        }

        $this->located = -1;
    }

    /* set module path */

    protected function _set_module_path(&$_route) {
        if (!empty($_route)) {
            // Are module/directory/controller/method segments being specified?
            $sgs = sscanf($_route, '%[^/]/%[^/]/%[^/]/%s', $module, $directory, $class, $method);

            // set the module/controller directory location if found
            if ($this->locate(array($module, $directory, $class))) {
                //reset to class/method
                switch ($sgs) {
                    case 1: $_route = $module . '/index';
                        break;
                    case 2: $_route = ($this->located < 2) ? $module . '/' . $directory : $directory . '/index';
                        break;
                    case 3: $_route = ($this->located == 2) ? $directory . '/' . $class : $class . '/index';
                        break;
                    case 4: $_route = ($this->located == 3) ? $class . '/' . $method : $method . '/index';
                        break;
                }
            }
        }
    }

    public function set_class($class) {
        $suffix = $this->config->item('controller_suffix');
        if (strpos($class, $suffix) === FALSE) {
            $class .= $suffix;
        }
        parent::set_class($class);
    }

}
