router.php

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<?php
/* SVN FILE: $Id: router.php 8258 2009-07-28 09:49:27Z DarkAngelBGE $ */
/**
 * Parses the request URL into controller, action, and parameters.
 *
 * Long description for file
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)
 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package       cake
 * @subpackage    cake.cake.libs
 * @since         CakePHP(tm) v 0.2.9
 * @version       $Revision: 8258 $
 * @modifiedby    $LastChangedBy: DarkAngelBGE $
 * @lastmodified  $Date: 2009-07-28 05:49:27 -0400 (Tue, 28 Jul 2009) $
 * @license       http://www.opensource.org/licenses/mit-license.php The MIT License
 */
/**
 * Included libraries.
 *
 */
if (!class_exists('Object')) {
    App::import('Core', 'Object');
}
/**
 * Parses the request URL into controller, action, and parameters.
 *
 * @package       cake
 * @subpackage    cake.cake.libs
 */
class Router extends Object {
/**
 * Array of routes
 *
 * @var array
 * @access public
 */
    var $routes = array();
/**
 * Caches admin setting from Configure class
 *
 * @var array
 * @access private
 */
    var $__admin = null;
/**
 * List of action prefixes used in connected routes
 *
 * @var array
 * @access private
 */
    var $__prefixes = array();
/**
 * Directive for Router to parse out file extensions for mapping to Content-types.
 *
 * @var boolean
 * @access private
 */
    var $__parseExtensions = false;
/**
 * List of valid extensions to parse from a URL.  If null, any extension is allowed.
 *
 * @var array
 * @access private
 */
    var $__validExtensions = null;
/**
 * 'Constant' regular expression definitions for named route elements
 *
 * @var array
 * @access private
 */
    var $__named = array(
        'Action'    => 'index|show|add|create|edit|update|remove|del|delete|view|item',
        'Year'      => '[12][0-9]{3}',
        'Month'     => '0[1-9]|1[012]',
        'Day'       => '0[1-9]|[12][0-9]|3[01]',
        'ID'        => '[0-9]+',
        'UUID'      => '[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}'
    );
/**
 * Stores all information necessary to decide what named arguments are parsed under what conditions.
 *
 * @var string
 * @access public
 */
    var $named = array(
        'default' => array('page', 'fields', 'order', 'limit', 'recursive', 'sort', 'direction', 'step'),
        'greedy' => true,
        'separator' => ':',
        'rules' => false,
    );
/**
 * The route matching the URL of the current request
 *
 * @var array
 * @access private
 */
    var $__currentRoute = array();
/**
 * HTTP header shortcut map.  Used for evaluating header-based route expressions.
 *
 * @var array
 * @access private
 */
    var $__headerMap = array(
        'type'      => 'content_type',
        'method'    => 'request_method',
        'server'    => 'server_name'
    );
/**
 * Default HTTP request method => controller action map.
 *
 * @var array
 * @access private
 */
    var $__resourceMap = array(
        array('action' => 'index',  'method' => 'GET',      'id' => false),
        array('action' => 'view',   'method' => 'GET',      'id' => true),
        array('action' => 'add',    'method' => 'POST',     'id' => false),
        array('action' => 'edit',   'method' => 'PUT',      'id' => true),
        array('action' => 'delete', 'method' => 'DELETE',   'id' => true),
        array('action' => 'edit',   'method' => 'POST',     'id' => true)
    );
/**
 * List of resource-mapped controllers
 *
 * @var array
 * @access private
 */
    var $__resourceMapped = array();
/**
 * Maintains the parameter stack for the current request
 *
 * @var array
 * @access private
 */
    var $__params = array();
/**
 * Maintains the path stack for the current request
 *
 * @var array
 * @access private
 */
    var $__paths = array();
/**
 * Keeps Router state to determine if default routes have already been connected
 *
 * @var boolean
 * @access private
 */
    var $__defaultsMapped = false;
/**
 * Gets a reference to the Router object instance
 *
 * @return object Object instance
 * @access public
 * @static
 */
    function &getInstance() {
        static $instance = array();

        if (!$instance) {
            $instance[0] =& new Router();
            $instance[0]->__admin = Configure::read('Routing.admin');
        }
        return $instance[0];
    }
/**
 * Gets the named route elements for use in app/config/routes.php
 *
 * @return array Named route elements
 * @access public
 * @see Router::$__named
 * @static
 */
    function getNamedExpressions() {
        $_this =& Router::getInstance();
        return $_this->__named;
    }
/**
 * Returns this object's routes array. Returns false if there are no routes available.
 *
 * @param string $route         An empty string, or a route string "/"
 * @param array $default        NULL or an array describing the default route
 * @param array $params         An array matching the named elements in the route to regular expressions which that element should match.
 * @see routes
 * @return array            Array of routes
 * @access public
 * @static
 */
    function connect($route, $default = array(), $params = array()) {
        $_this =& Router::getInstance();

        if (!isset($default['action'])) {
            $default['action'] = 'index';
        }
        if (isset($default[$_this->__admin])) {
            $default['prefix'] = $_this->__admin;
        }
        if (isset($default['prefix'])) {
            $_this->__prefixes[] = $default['prefix'];
            $_this->__prefixes = array_keys(array_flip($_this->__prefixes));
        }
        $_this->routes[] = array($route, $default, $params);
        return $_this->routes;
    }
/**
 * Specifies what named parameters CakePHP should be parsing. The most common setups are:
 *
 * Do not parse any named parameters:
 * {{{ Router::connectNamed(false); }}}
 *
 * Parse only default parameters used for CakePHP's pagination:
 * {{{ Router::connectNamed(false, array('default' => true)); }}}
 *
 * Parse only the page parameter if its value is a number:
 * {{{ Router::connectNamed(array('page' => '[\d]+'), array('default' => false, 'greedy' => false)); }}}
 *
 * Parse only the page parameter no mater what.
 * {{{ Router::connectNamed(array('page'), array('default' => false, 'greedy' => false)); }}}
 *
 * Parse only the page parameter if the current action is 'index'.
 * {{{ Router::connectNamed(array('page' => array('action' => 'index')), array('default' => false, 'greedy' => false)); }}}
 *
 * Parse only the page parameter if the current action is 'index' and the controller is 'pages'.
 * {{{ Router::connectNamed(array('page' => array('action' => 'index', 'controller' => 'pages')), array('default' => false, 'greedy' => false)); }}}
 *
 * @param array $named A list of named parameters. Key value pairs are accepted where values are either regex strings to match, or arrays as seen above.
 * @param array $options Allows to control all settings: separator, greedy, reset, default
 * @return array
 * @access public
 * @static
 */
    function connectNamed($named, $options = array()) {
        $_this =& Router::getInstance();

        if (isset($options['argSeparator'])) {
            $_this->named['separator'] = $options['argSeparator'];
            unset($options['argSeparator']);
        }

        if ($named === true || $named === false) {
            $options = array_merge(array('default' => $named, 'reset' => true, 'greedy' => $named), $options);
            $named = array();
        }
        $options = array_merge(array('default' => false, 'reset' => false, 'greedy' => true), $options);

        if ($options['reset'] == true || $_this->named['rules'] === false) {
            $_this->named['rules'] = array();
        }

        if ($options['default']) {
            $named = array_merge($named, $_this->named['default']);
        }

        foreach ($named as $key => $val) {
            if (is_numeric($key)) {
                $_this->named['rules'][$val] = true;
            } else {
                $_this->named['rules'][$key] = $val;
            }
        }
        $_this->named['greedy'] = $options['greedy'];
        return $_this->named;
    }
/**
 * Creates REST resource routes for the given controller(s)
 *
 * Options:
 *
 * - 'id' - The regular expression fragment to use when matching IDs.  By default, matches
 *    integer values and UUIDs.
 * - 'prefix' - URL prefix to use for the generated routes.  Defaults to '/'.
 *
 * @param mixed $controller A controller name or array of controller names (i.e. "Posts" or "ListItems")
 * @param array $options Options to use when generating REST routes
 * @return void
 * @access public
 * @static
 */
    function mapResources($controller, $options = array()) {
        $_this =& Router::getInstance();
        $options = array_merge(array('prefix' => '/', 'id' => $_this->__named['ID'] . '|' . $_this->__named['UUID']), $options);
        $prefix = $options['prefix'];

        foreach ((array)$controller as $ctlName) {
            $urlName = Inflector::underscore($ctlName);

            foreach ($_this->__resourceMap as $params) {
                extract($params);
                $url = $prefix . $urlName . (($id) ? '/:id' : '');

                Router::connect($url,
                    array('controller' => $urlName, 'action' => $action, '[method]' => $params['method']),
                    array('id' => $options['id'], 'pass' => array('id'))
                );
            }
            $_this->__resourceMapped[] = $urlName;
        }
    }
/**
 * Builds a route regular expression
 *
 * @param string $route An empty string, or a route string "/"
 * @param array $default NULL or an array describing the default route
 * @param array $params An array matching the named elements in the route to regular expressions which that element should match.
 * @return array
 * @see routes
 * @access public
 * @static
 */
    function writeRoute($route, $default, $params) {
        if (empty($route) || ($route === '/')) {
            return array('/^[\/]*$/', array());
        }
        $names = array();
        $elements = explode('/', $route);

        foreach ($elements as $element) {
            if (empty($element)) {
                continue;
            }
            $q = null;
            $element = trim($element);
            $namedParam = strpos($element, ':') !== false;

            if ($namedParam && preg_match('/^:([^:]+)$/', $element, $r)) {
                if (isset($params[$r[1]])) {
                    if ($r[1] != 'plugin' && array_key_exists($r[1], $default)) {
                        $q = '?';
                    }
                    $parsed[] = '(?:/(' . $params[$r[1]] . ')' . $q . ')' . $q;
                } else {
                    $parsed[] = '(?:/([^\/]+))?';
                }
                $names[] = $r[1];
            } elseif ($element === '*') {
                $parsed[] = '(?:/(.*))?';
            } else if ($namedParam && preg_match_all('/(?!\\\\):([a-z_0-9]+)/i', $element, $matches)) {
                $matchCount = count($matches[1]);

                foreach ($matches[1] as $i => $name) {
                    $pos = strpos($element, ':' . $name);
                    $before = substr($element, 0, $pos);
                    $element = substr($element, $pos + strlen($name) + 1);
                    $after = null;

                    if ($i + 1 === $matchCount && $element) {
                        $after = preg_quote($element);
                    }

                    if ($i === 0) {
                        $before = '/' . $before;
                    }
                    $before = preg_quote($before, '#');

                    if (isset($params[$name])) {
                        if (isset($default[$name]) && $name != 'plugin') {
                            $q = '?';
                        }
                        $parsed[] = '(?:' . $before . '(' . $params[$name] . ')' . $q . $after . ')' . $q;
                    } else {
                        $parsed[] = '(?:' . $before . '([^\/]+)' . $after . ')?';
                    }
                    $names[] = $name;
                }
            } else {
                $parsed[] = '/' . $element;
            }
        }
        return array('#^' . join('', $parsed) . '[\/]*$#', $names);
    }
/**
 * Returns the list of prefixes used in connected routes
 *
 * @return array A list of prefixes used in connected routes
 * @access public
 * @static
 */
    function prefixes() {
        $_this =& Router::getInstance();
        return $_this->__prefixes;
    }
/**
 * Parses given URL and returns an array of controllers, action and parameters
 * taken from that URL.
 *
 * @param string $url URL to be parsed
 * @return array Parsed elements from URL
 * @access public
 * @static
 */
    function parse($url) {
        $_this =& Router::getInstance();
        if (!$_this->__defaultsMapped) {
            $_this->__connectDefaultRoutes();
        }
        $out = array('pass' => array(), 'named' => array());
        $r = $ext = null;

        if (ini_get('magic_quotes_gpc') === '1') {
            $url = stripslashes_deep($url);
        }

        if ($url && strpos($url, '/') !== 0) {
            $url = '/' . $url;
        }
        if (strpos($url, '?') !== false) {
            $url = substr($url, 0, strpos($url, '?'));
        }
        extract($_this->__parseExtension($url));

        foreach ($_this->routes as $i => $route) {
            if (count($route) === 3) {
                $route = $_this->compile($i);
            }

            if (($r = $_this->__matchRoute($route, $url)) !== false) {
                $_this->__currentRoute[] = $route;
                list($route, $regexp, $names, $defaults, $params) = $route;
                $argOptions = array();

                if (array_key_exists('named', $params)) {
                    $argOptions['named'] = $params['named'];
                    unset($params['named']);
                }
                if (array_key_exists('greedy', $params)) {
                    $argOptions['greedy'] = $params['greedy'];
                    unset($params['greedy']);
                }
                array_shift($r);

                foreach ($names as $name) {
                    $out[$name] = null;
                }
                if (is_array($defaults)) {
                    foreach ($defaults as $name => $value) {
                        if (preg_match('#[a-zA-Z_\-]#i', $name)) {
                            $out[$name] = $value;
                        } else {
                            $out['pass'][] = $value;
                        }
                    }
                }

                foreach ($r as $key => $found) {
                    if (empty($found) && $found != 0) {
                        continue;
                    }

                    if (isset($names[$key])) {
                        $out[$names[$key]] = $_this->stripEscape($found);
                    } else {
                        $argOptions['context'] = array('action' => $out['action'], 'controller' => $out['controller']);
                        extract($_this->getArgs($found, $argOptions));
                        $out['pass'] = array_merge($out['pass'], $pass);
                        $out['named'] = $named;
                    }
                }

                if (isset($params['pass'])) {
                    for ($j = count($params['pass']) - 1; $j > -1; $j--) {
                        if (isset($out[$params['pass'][$j]])) {
                            array_unshift($out['pass'], $out[$params['pass'][$j]]);
                        }
                    }
                }
                break;
            }
        }

        if (!empty($ext)) {
            $out['url']['ext'] = $ext;
        }
        return $out;
    }
/**
 * Checks to see if the given URL matches the given route
 *
 * @param array $route
 * @param string $url
 * @return mixed Boolean false on failure, otherwise array
 * @access private
 */
    function __matchRoute($route, $url) {
        list($route, $regexp, $names, $defaults) = $route;

        if (!preg_match($regexp, $url, $r)) {
            return false;
        } else {
            foreach ($defaults as $key => $val) {
                if ($key{0} === '[' && preg_match('/^\[(\w+)\]$/', $key, $header)) {
                    if (isset($this->__headerMap[$header[1]])) {
                        $header = $this->__headerMap[$header[1]];
                    } else {
                        $header = 'http_' . $header[1];
                    }

                    $val = (array)$val;
                    $h = false;

                    foreach ($val as $v) {
                        if (env(strtoupper($header)) === $v) {
                            $h = true;
                        }
                    }
                    if (!$h) {
                        return false;
                    }
                }
            }
        }
        return $r;
    }
/**
 * Compiles a route by numeric key and returns the compiled expression, replacing
 * the existing uncompiled route.  Do not call statically.
 *
 * @param integer $i
 * @return array Returns an array containing the compiled route
 * @access public
 */
    function compile($i) {
        $route = $this->routes[$i];

        list($pattern, $names) = $this->writeRoute($route[0], $route[1], $route[2]);
        $this->routes[$i] = array(
            $route[0], $pattern, $names,
            array_merge(array('plugin' => null, 'controller' => null), (array)$route[1]),
            $route[2]
        );
        return $this->routes[$i];
    }
/**
 * Parses a file extension out of a URL, if Router::parseExtensions() is enabled.
 *
 * @param string $url
 * @return array Returns an array containing the altered URL and the parsed extension.
 * @access private
 */
    function __parseExtension($url) {
        $ext = null;

        if ($this->__parseExtensions) {
            if (preg_match('/\.[0-9a-zA-Z]*$/', $url, $match) === 1) {
                $match = substr($match[0], 1);
                if (empty($this->__validExtensions)) {
                    $url = substr($url, 0, strpos($url, '.' . $match));
                    $ext = $match;
                } else {
                    foreach ($this->__validExtensions as $name) {
                        if (strcasecmp($name, $match) === 0) {
                            $url = substr($url, 0, strpos($url, '.' . $name));
                            $ext = $match;
                        }
                    }
                }
            }
            if (empty($ext)) {
                $ext = 'html';
            }
        }
        return compact('ext', 'url');
    }
/**
 * Connects the default, built-in routes, including admin routes, and (deprecated) web services
 * routes.
 *
 * @return void
 * @access private
 */
    function __connectDefaultRoutes() {
        if ($this->__defaultsMapped) {
            return;
        }

        if ($this->__admin) {
            $params = array('prefix' => $this->__admin, $this->__admin => true);
        }

        if ($plugins = Configure::listObjects('plugin')) {
            foreach ($plugins as $key => $value) {
                $plugins[$key] = Inflector::underscore($value);
            }

            $match = array('plugin' => implode('|', $plugins));
            $this->connect('/:plugin/:controller/:action/*', array(), $match);

            if ($this->__admin) {
                $this->connect("/{$this->__admin}/:plugin/:controller", $params, $match);
                $this->connect("/{$this->__admin}/:plugin/:controller/:action/*", $params, $match);
            }
        }

        if ($this->__admin) {
            $this->connect("/{$this->__admin}/:controller", $params);
            $this->connect("/{$this->__admin}/:controller/:action/*", $params);
        }
        $this->connect('/:controller', array('action' => 'index'));
        $this->connect('/:controller/:action/*');

        if ($this->named['rules'] === false) {
            $this->connectNamed(true);
        }
        $this->__defaultsMapped = true;
    }
/**
 * Takes parameter and path information back from the Dispatcher
 *
 * @param array $params Parameters and path information
 * @return void
 * @access public
 * @static
 */
    function setRequestInfo($params) {
        $_this =& Router::getInstance();
        $defaults = array('plugin' => null, 'controller' => null, 'action' => null);
        $params[0] = array_merge($defaults, (array)$params[0]);
        $params[1] = array_merge($defaults, (array)$params[1]);
        list($_this->__params[], $_this->__paths[]) = $params;

        if (count($_this->__paths)) {
            if (isset($_this->__paths[0]['namedArgs'])) {
                foreach ($_this->__paths[0]['namedArgs'] as $arg => $value) {
                    $_this->named['rules'][$arg] = true;
                }
            }
        }
    }
/**
 * Gets parameter information
 *
 * @param boolean $current Get current parameter (true)
 * @return array Parameter information
 * @access public
 * @static
 */
    function getParams($current = false) {
        $_this =& Router::getInstance();
        if ($current) {
            return $_this->__params[count($_this->__params) - 1];
        }
        if (isset($_this->__params[0])) {
            return $_this->__params[0];
        }
        return array();
    }
/**
 * Gets URL parameter by name
 *
 * @param string $name Parameter name
 * @param boolean $current Current parameter
 * @return string Parameter value
 * @access public
 * @static
 */
    function getParam($name = 'controller', $current = false) {
        $params = Router::getParams($current);
        if (isset($params[$name])) {
            return $params[$name];
        }
        return null;
    }
/**
 * Gets path information
 *
 * @param boolean $current Current parameter
 * @return array
 * @access public
 * @static
 */
    function getPaths($current = false) {
        $_this =& Router::getInstance();
        if ($current) {
            return $_this->__paths[count($_this->__paths) - 1];
        }
        if (!isset($_this->__paths[0])) {
            return array('base' => null);
        }
        return $_this->__paths[0];
    }
/**
 * Reloads default Router settings
 *
 * @access public
 * @return void
 * @static
 */
    function reload() {
        $_this =& Router::getInstance();
        foreach (get_class_vars('Router') as $key => $val) {
            $_this->{$key} = $val;
        }
        $_this->__admin = Configure::read('Routing.admin');
    }
/**
 * Promote a route (by default, the last one added) to the beginning of the list
 *
 * @param $which A zero-based array index representing the route to move. For example,
 *               if 3 routes have been added, the last route would be 2.
 * @return boolean Retuns false if no route exists at the position specified by $which.
 * @access public
 * @static
 */
    function promote($which = null) {
        $_this =& Router::getInstance();
        if ($which === null) {
            $which = count($_this->routes) - 1;
        }
        if (!isset($_this->routes[$which])) {
            return false;
        }
        $route = $_this->routes[$which];
        unset($_this->routes[$which]);
        array_unshift($_this->routes, $route);
        return true;
    }
/**
 * Finds URL for specified action.
 *
 * Returns an URL pointing to a combination of controller and action. Param
 * $url can be:
 *
 * - Empty - the method will find adress to actuall controller/action.
 * - '/' - the method will find base URL of application.
 * - A combination of controller/action - the method will find url for it.
 *
 * @param mixed $url Cake-relative URL, like "/products/edit/92" or "/presidents/elect/4"
 *   or an array specifying any of the following: 'controller', 'action',
 *   and/or 'plugin', in addition to named arguments (keyed array elements),
 *   and standard URL arguments (indexed array elements)
 * @param mixed $full If (bool) true, the full base URL will be prepended to the result.
 *   If an array accepts the following keys
 *    - escape - used when making urls embedded in html escapes query string '&'
 *    - full - if true the full base URL will be prepended.
 * @return string Full translated URL with base path.
 * @access public
 * @static
 */
    function url($url = null, $full = false) {
        $_this =& Router::getInstance();
        $defaults = $params = array('plugin' => null, 'controller' => null, 'action' => 'index');

        if (is_bool($full)) {
            $escape = false;
        } else {
            extract(array_merge(array('escape' => false, 'full' => false), $full));
        }

        if (!empty($_this->__params)) {
            if (isset($this) && !isset($this->params['requested'])) {
                $params = $_this->__params[0];
            } else {
                $params = end($_this->__params);
            }
        }
        $path = array('base' => null);

        if (!empty($_this->__paths)) {
            if (isset($this) && !isset($this->params['requested'])) {
                $path = $_this->__paths[0];
            } else {
                $path = end($_this->__paths);
            }
        }
        $base = $path['base'];
        $extension = $output = $mapped = $q = $frag = null;

        if (is_array($url)) {
            if (isset($url['base']) && $url['base'] === false) {
                $base = null;
                unset($url['base']);
            }
            if (isset($url['full_base']) && $url['full_base'] === true) {
                $full = true;
                unset($url['full_base']);
            }
            if (isset($url['?'])) {
                $q = $url['?'];
                unset($url['?']);
            }
            if (isset($url['#'])) {
                $frag = '#' . urlencode($url['#']);
                unset($url['#']);
            }
            if (empty($url['action'])) {
                if (empty($url['controller']) || $params['controller'] === $url['controller']) {
                    $url['action'] = $params['action'];
                } else {
                    $url['action'] = 'index';
                }
            }
            if ($_this->__admin) {
                if (!isset($url[$_this->__admin]) && !empty($params[$_this->__admin])) {
                    $url[$_this->__admin] = true;
                } elseif ($_this->__admin && isset($url[$_this->__admin]) && !$url[$_this->__admin]) {
                    unset($url[$_this->__admin]);
                }
            }
            $plugin = false;

            if (array_key_exists('plugin', $url)) {
                $plugin = $url['plugin'];
            }

            $url = array_merge(array('controller' => $params['controller'], 'plugin' => $params['plugin']), Set::filter($url, true));

            if ($plugin !== false) {
                $url['plugin'] = $plugin;
            }

            if (isset($url['ext'])) {
                $extension = '.' . $url['ext'];
                unset($url['ext']);
            }
            $match = false;

            foreach ($_this->routes as $i => $route) {
                if (count($route) === 3) {
                    $route = $_this->compile($i);
                }
                $originalUrl = $url;

                if (isset($route[4]['persist'], $_this->__params[0])) {
                    $url = array_merge(array_intersect_key($params, Set::combine($route[4]['persist'], '/')), $url);
                }
                if ($match = $_this->mapRouteElements($route, $url)) {
                    $output = trim($match, '/');
                    $url = array();
                    break;
                }
                $url = $originalUrl;
            }

            $named = $args = array();
            $skip = array(
                'bare', 'action', 'controller', 'plugin', 'ext', '?', '#', 'prefix', $_this->__admin
            );

            $keys = array_values(array_diff(array_keys($url), $skip));
            $count = count($keys);

            // Remove this once parsed URL parameters can be inserted into 'pass'
            for ($i = 0; $i < $count; $i++) {
                if ($i === 0 && is_numeric($keys[$i]) && in_array('id', $keys)) {
                    $args[0] = $url[$keys[$i]];
                } elseif (is_numeric($keys[$i]) || $keys[$i] === 'id') {
                    $args[] = $url[$keys[$i]];
                } else {
                    $named[$keys[$i]] = $url[$keys[$i]];
                }
            }

            if ($match === false) {
                list($args, $named)  = array(Set::filter($args, true), Set::filter($named));
                if (!empty($url[$_this->__admin])) {
                    $url['action'] = str_replace($_this->__admin . '_', '', $url['action']);
                }

                if (empty($named) && empty($args) && (!isset($url['action']) || $url['action'] === 'index')) {
                    $url['action'] = null;
                }

                $urlOut = Set::filter(array($url['controller'], $url['action']));

                if (isset($url['plugin']) && $url['plugin'] != $url['controller']) {
                    array_unshift($urlOut, $url['plugin']);
                }

                if ($_this->__admin && isset($url[$_this->__admin])) {
                    array_unshift($urlOut, $_this->__admin);
                }
                $output = join('/', $urlOut) . '/';
            }

            if (!empty($args)) {
                $args = join('/', $args);
                if ($output{strlen($output) - 1} != '/') {
                    $args = '/'. $args;
                }
                $output .= $args;
            }

            if (!empty($named)) {
                foreach ($named as $name => $value) {
                    $output .= '/' . $name . $_this->named['separator'] . $value;
                }
            }
            $output = str_replace('//', '/', $base . '/' . $output);
        } else {
            if (((strpos($url, '://')) || (strpos($url, 'javascript:') === 0) || (strpos($url, 'mailto:') === 0)) || (!strncmp($url, '#', 1))) {
                return $url;
            }
            if (empty($url)) {
                if (!isset($path['here'])) {
                    $path['here'] = '/';
                }
                $output = $path['here'];
            } elseif (substr($url, 0, 1) === '/') {
                $output = $base . $url;
            } else {
                $output = $base . '/';
                if ($_this->__admin && isset($params[$_this->__admin])) {
                    $output .= $_this->__admin . '/';
                }
                if (!empty($params['plugin']) && $params['plugin'] !== $params['controller']) {
                    $output .= Inflector::underscore($params['plugin']) . '/';
                }
                $output .= Inflector::underscore($params['controller']) . '/' . $url;
            }
            $output = str_replace('//', '/', $output);
        }
        if ($full && defined('FULL_BASE_URL')) {
            $output = FULL_BASE_URL . $output;
        }
        if (!empty($extension) && substr($output, -1) === '/') {
            $output = substr($output, 0, -1);
        }

        return $output . $extension . $_this->queryString($q, array(), $escape) . $frag;
    }
/**
 * Maps a URL array onto a route and returns the string result, or false if no match
 *
 * @param array $route Route Route
 * @param array $url URL URL to map
 * @return mixed Result (as string) or false if no match
 * @access public
 * @static
 */
    function mapRouteElements($route, $url) {
        if (isset($route[3]['prefix'])) {
            $prefix = $route[3]['prefix'];
            unset($route[3]['prefix']);
        }

        $pass = array();
        $defaults = $route[3];
        $routeParams = $route[2];
        $params = Set::diff($url, $defaults);
        $urlInv = array_combine(array_values($url), array_keys($url));

        $i = 0;
        while (isset($defaults[$i])) {
            if (isset($urlInv[$defaults[$i]])) {
                if (!in_array($defaults[$i], $url) && is_int($urlInv[$defaults[$i]])) {
                    return false;
                }
                unset($urlInv[$defaults[$i]], $defaults[$i]);
            } else {
                return false;
            }
            $i++;
        }

        foreach ($params as $key => $value) {
            if (is_int($key)) {
                $pass[] = $value;
                unset($params[$key]);
            }
        }
        list($named, $params) = Router::getNamedElements($params);

        if (!strpos($route[0], '*') && (!empty($pass) || !empty($named))) {
            return false;
        }

        $urlKeys = array_keys($url);
        $paramsKeys = array_keys($params);
        $defaultsKeys = array_keys($defaults);

        if (!empty($params)) {
            if (array_diff($paramsKeys, $routeParams) != array()) {
                return false;
            }
            $required = array_values(array_diff($routeParams, $urlKeys));
            $reqCount = count($required);

            for ($i = 0; $i < $reqCount; $i++) {
                if (array_key_exists($required[$i], $defaults) && $defaults[$required[$i]] === null) {
                    unset($required[$i]);
                }
            }
        }
        $isFilled = true;

        if (!empty($routeParams)) {
            $filled = array_intersect_key($url, array_combine($routeParams, array_keys($routeParams)));
            $isFilled = (array_diff($routeParams, array_keys($filled)) === array());
            if (!$isFilled && empty($params)) {
                return false;
            }
        }

        if (empty($params)) {
            return Router::__mapRoute($route, array_merge($url, compact('pass', 'named', 'prefix')));
        } elseif (!empty($routeParams) && !empty($route[3])) {

            if (!empty($required)) {
                return false;
            }
            foreach ($params as $key => $val) {
                if ((!isset($url[$key]) || $url[$key] != $val) || (!isset($defaults[$key]) || $defaults[$key] != $val) && !in_array($key, $routeParams)) {
                    if (!isset($defaults[$key])) {
                        continue;
                    }
                    return false;
                }
            }
        } else {
            if (empty($required) && $defaults['plugin'] === $url['plugin'] && $defaults['controller'] === $url['controller'] && $defaults['action'] === $url['action']) {
                return Router::__mapRoute($route, array_merge($url, compact('pass', 'named', 'prefix')));
            }
            return false;
        }

        if (!empty($route[4])) {
            foreach ($route[4] as $key => $reg) {
                if (array_key_exists($key, $url) && !preg_match('#' . $reg . '#', $url[$key])) {
                    return false;
                }
            }
        }
        return Router::__mapRoute($route, array_merge($filled, compact('pass', 'named', 'prefix')));
    }
/**
 * Merges URL parameters into a route string
 *
 * @param array $route Route
 * @param array $params Parameters
 * @return string Merged URL with parameters
 * @access private
 */
    function __mapRoute($route, $params = array()) {
        if (isset($params['plugin']) && isset($params['controller']) && $params['plugin'] === $params['controller']) {
            unset($params['controller']);
        }

        if (isset($params['prefix']) && isset($params['action'])) {
            $params['action'] = str_replace($params['prefix'] . '_', '', $params['action']);
            unset($params['prefix']);
        }

        if (isset($params['pass']) && is_array($params['pass'])) {
            $params['pass'] = implode('/', Set::filter($params['pass'], true));
        } elseif (!isset($params['pass'])) {
            $params['pass'] = '';
        }

        if (isset($params['named'])) {
            if (is_array($params['named'])) {
                $count = count($params['named']);
                $keys = array_keys($params['named']);
                $named = array();

                for ($i = 0; $i < $count; $i++) {
                    $named[] = $keys[$i] . $this->named['separator'] . $params['named'][$keys[$i]];
                }
                $params['named'] = join('/', $named);
            }
            $params['pass'] = str_replace('//', '/', $params['pass'] . '/' . $params['named']);
        }
        $out = $route[0];

        foreach ($route[2] as $key) {
            $string = null;
            if (isset($params[$key])) {
                $string = $params[$key];
                unset($params[$key]);
            } elseif (strpos($out, $key) != strlen($out) - strlen($key)) {
                $key = $key . '/';
            }
            $out = str_replace(':' . $key, $string, $out);
        }

        if (strpos($route[0], '*')) {
            $out = str_replace('*', $params['pass'], $out);
        }

        return $out;
    }
/**
 * Takes an array of URL parameters and separates the ones that can be used as named arguments
 *
 * @param array $params         Associative array of URL parameters.
 * @param string $controller    Name of controller being routed.  Used in scoping.
 * @param string $action        Name of action being routed.  Used in scoping.
 * @return array
 * @access public
 * @static
 */
    function getNamedElements($params, $controller = null, $action = null) {
        $_this =& Router::getInstance();
        $named = array();

        foreach ($params as $param => $val) {
            if (isset($_this->named['rules'][$param])) {
                $rule = $_this->named['rules'][$param];
                if (Router::matchNamed($param, $val, $rule, compact('controller', 'action'))) {
                    $named[$param] = $val;
                    unset($params[$param]);
                }
            }
        }
        return array($named, $params);
    }
/**
 * Return true if a given named $param's $val matches a given $rule depending on $context. Currently implemented
 * rule types are controller, action and match that can be combined with each other.
 *
 * @param string $param The name of the named parameter
 * @param string $val The value of the named parameter
 * @param array $rule The rule(s) to apply, can also be a match string
 * @param string $context An array with additional context information (controller / action)
 * @return boolean
 * @access public
 */
    function matchNamed($param, $val, $rule, $context = array()) {
        if ($rule === true || $rule === false) {
            return $rule;
        }
        if (is_string($rule)) {
            $rule = array('match' => $rule);
        }
        if (!is_array($rule)) {
            return false;
        }

        $controllerMatches = !isset($rule['controller'], $context['controller']) || in_array($context['controller'], (array)$rule['controller']);
        if (!$controllerMatches) {
            return false;
        }
        $actionMatches = !isset($rule['action'], $context['action']) || in_array($context['action'], (array)$rule['action']);
        if (!$actionMatches) {
            return false;
        }
        $valueMatches = !isset($rule['match']) || preg_match(sprintf('/%s/', $rule['match']), $val);
        return $valueMatches;
    }
/**
 * Generates a well-formed querystring from $q
 *
 * @param mixed $q Query string
 * @param array $extra Extra querystring parameters.
 * @param bool $escape Whether or not to use escaped &
 * @return array
 * @access public
 * @static
 */
    function queryString($q, $extra = array(), $escape = false) {
        if (empty($q) && empty($extra)) {
            return null;
        }
        $join = '&';
        if ($escape === true) {
            $join = '&amp;';
        }
        $out = '';

        if (is_array($q)) {
            $q = array_merge($extra, $q);
        } else {
            $out = $q;
            $q = $extra;
        }
        $out .= http_build_query($q, null, $join);
        if (isset($out[0]) && $out[0] != '?') {
            $out = '?' . $out;
        }
        return $out;
    }
/**
 * Normalizes a URL for purposes of comparison
 *
 * @param mixed $url URL to normalize
 * @return string Normalized URL
 * @access public
 */
    function normalize($url = '/') {
        if (is_array($url)) {
            $url = Router::url($url);
        } elseif (preg_match('/^[a-z\-]+:\/\//', $url)) {
            return $url;
        }
        $paths = Router::getPaths();

        if (!empty($paths['base']) && stristr($url, $paths['base'])) {
            $url = preg_replace('/^' . preg_quote($paths['base'], '/') . '/', '', $url, 1);
        }
        $url = '/' . $url;

        while (strpos($url, '//') !== false) {
            $url = str_replace('//', '/', $url);
        }
        $url = preg_replace('/(?:(\/$))/', '', $url);

        if (empty($url)) {
            return '/';
        }
        return $url;
    }
/**
 * Returns the route matching the current request URL.
 *
 * @return array Matching route
 * @access public
 * @static
 */
    function requestRoute() {
        $_this =& Router::getInstance();
        return $_this->__currentRoute[0];
    }
/**
 * Returns the route matching the current request (useful for requestAction traces)
 *
 * @return array Matching route
 * @access public
 * @static
 */
    function currentRoute() {
        $_this =& Router::getInstance();
        return $_this->__currentRoute[count($_this->__currentRoute) - 1];
    }
/**
 * Removes the plugin name from the base URL.
 *
 * @param string $base Base URL
 * @param string $plugin Plugin name
 * @return base url with plugin name removed if present
 * @access public
 * @static
 */
    function stripPlugin($base, $plugin = null) {
        if ($plugin != null) {
            $base = preg_replace('/(?:' . $plugin . ')/', '', $base);
            $base = str_replace('//', '', $base);
            $pos1 = strrpos($base, '/');
            $char = strlen($base) - 1;

            if ($pos1 === $char) {
                $base = substr($base, 0, $char);
            }
        }
        return $base;
    }
/**
 * Strip escape characters from parameter values.
 *
 * @param mixed $param Either an array, or a string
 * @return mixed Array or string escaped
 * @access public
 * @static
 */
    function stripEscape($param) {
        $_this =& Router::getInstance();
        if (!is_array($param) || empty($param)) {
            if (is_bool($param)) {
                return $param;
            }

            return preg_replace('/^(?:[\\t ]*(?:-!)+)/', '', $param);
        }

        foreach ($param as $key => $value) {
            if (is_string($value)) {
                $return[$key] = preg_replace('/^(?:[\\t ]*(?:-!)+)/', '', $value);
            } else {
                foreach ($value as $array => $string) {
                    $return[$key][$array] = $_this->stripEscape($string);
                }
            }
        }
        return $return;
    }
/**
 * Instructs the router to parse out file extensions from the URL. For example,
 * http://example.com/posts.rss would yield an file extension of "rss".
 * The file extension itself is made available in the controller as
 * $this->params['url']['ext'], and is used by the RequestHandler component to
 * automatically switch to alternate layouts and templates, and load helpers
 * corresponding to the given content, i.e. RssHelper.
 *
 * A list of valid extension can be passed to this method, i.e. Router::parseExtensions('rss', 'xml');
 * If no parameters are given, anything after the first . (dot) after the last / in the URL will be
 * parsed, excluding querystring parameters (i.e. ?q=...).
 *
 * @access public
 * @return void
 * @static
 */
    function parseExtensions() {
        $_this =& Router::getInstance();
        $_this->__parseExtensions = true;
        if (func_num_args() > 0) {
            $_this->__validExtensions = func_get_args();
        }
    }
/**
 * Takes an passed params and converts it to args
 *
 * @param array $params
 * @return array Array containing passed and named parameters
 * @access public
 * @static
 */
    function getArgs($args, $options = array()) {
        $_this =& Router::getInstance();
        $pass = $named = array();
        $args = explode('/', $args);

        $greedy = $_this->named['greedy'];
        if (isset($options['greedy'])) {
            $greedy = $options['greedy'];
        }
        $context = array();
        if (isset($options['context'])) {
            $context = $options['context'];
        }
        $rules = $_this->named['rules'];
        if (isset($options['named'])) {
            $greedy = isset($options['greedy']) && $options['greedy'] === true;
            foreach ((array)$options['named'] as $key => $val) {
                if (is_numeric($key)) {
                    $rules[$val] = true;
                    continue;
                }
                $rules[$key] = $val;
            }
        }

        foreach ($args as $param) {
            if (empty($param) && $param !== '0' && $param !== 0) {
                continue;
            }
            $param = $_this->stripEscape($param);

            $separatorIsPresent = strpos($param, $_this->named['separator']) !== false;
            if ((!isset($options['named']) || !empty($options['named'])) && $separatorIsPresent) {
                list($key, $val) = explode($_this->named['separator'], $param, 2);
                $hasRule = isset($rules[$key]);
                $passIt = (!$hasRule && !$greedy) || ($hasRule && !Router::matchNamed($key, $val, $rules[$key], $context));
                if ($passIt) {
                    $pass[] = $param;
                } else {
                    $named[$key] = $val;
                }
            } else {
                $pass[] = $param;
            }
        }
        return compact('pass', 'named');
    }
}
?>

---