<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Controller

 * @subpackage Router

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @version    $Id: Regex.php 20096 2010-01-06 02:05:09Z bkarwin $

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

/** Zend_Controller_Router_Route_Abstract */

require_once 'Zend/Controller/Router/Route/Abstract.php';

/**

 * Regex Route

 *

 * @package    Zend_Controller

 * @subpackage Router

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Controller_Router_Route_Regex extends Zend_Controller_Router_Route_Abstract

{

    protected $_regex = null;

    protected $_defaults = array();

    protected $_reverse = null;

    protected $_map = array();

    protected $_values = array();

    /**

     * Instantiates route based on passed Zend_Config structure

     *

     * @param Zend_Config $config Configuration object

     */

    public static function getInstance(Zend_Config $config)

    {

        $defs = ($config->defaults instanceof Zend_Config) ? $config->defaults->toArray() : array();

        $map = ($config->map instanceof Zend_Config) ? $config->map->toArray() : array();

        $reverse = (isset($config->reverse)) ? $config->reverse : null;

        return new self($config->route, $defs, $map, $reverse);

    }

    public function __construct($route, $defaults = array(), $map = array(), $reverse = null)

    {

        $this->_regex    = $route;

        $this->_defaults = (array) $defaults;

        $this->_map      = (array) $map;

        $this->_reverse  = $reverse;

    }

    public function getVersion() {

        return 1;

    }

    /**

     * Matches a user submitted path with a previously defined route.

     * Assigns and returns an array of defaults on a successful match.

     *

     * @param  string $path Path used to match against this routing map

     * @return array|false  An array of assigned values or a false on a mismatch

     */

    public function match($path, $partial = false)

    {

        if (!$partial) {

            $path = trim(urldecode($path), '/');

            $regex = '#^' . $this->_regex . '$#i';

        } else {

            $regex = '#^' . $this->_regex . '#i';

        }

        $res = preg_match($regex, $path, $values);

        if ($res === 0) {

            return false;

        }

        if ($partial) {

            $this->setMatchedPath($values[0]);

        }

        // array_filter_key()? Why isn't this in a standard PHP function set yet? :)

        foreach ($values as $i => $value) {

            if (!is_int($i) || $i === 0) {

                unset($values[$i]);

            }

        }

        $this->_values = $values;

        $values   = $this->_getMappedValues($values);

        $defaults = $this->_getMappedValues($this->_defaults, false, true);

        $return   = $values + $defaults;

        return $return;

    }

    /**

     * Maps numerically indexed array values to it's associative mapped counterpart.

     * Or vice versa. Uses user provided map array which consists of index => name

     * parameter mapping. If map is not found, it returns original array.

     *

     * Method strips destination type of keys form source array. Ie. if source array is

     * indexed numerically then every associative key will be stripped. Vice versa if reversed

     * is set to true.

     *

     * @param  array   $values Indexed or associative array of values to map

     * @param  boolean $reversed False means translation of index to association. True means reverse.

     * @param  boolean $preserve Should wrong type of keys be preserved or stripped.

     * @return array   An array of mapped values

     */

    protected function _getMappedValues($values, $reversed = false, $preserve = false)

    {

        if (count($this->_map) == 0) {

            return $values;

        }

        $return = array();

        foreach ($values as $key => $value) {

            if (is_int($key) && !$reversed) {

                if (array_key_exists($key, $this->_map)) {

                    $index = $this->_map[$key];

                } elseif (false === ($index = array_search($key, $this->_map))) {

                    $index = $key;

                }

                $return[$index] = $values[$key];

            } elseif ($reversed) {

                $index = $key;

                if (!is_int($key)) {

                    if (array_key_exists($key, $this->_map)) {

                        $index = $this->_map[$key];

                    } else {

                        $index = array_search($key, $this->_map, true);

                    }

                }

                if (false !== $index) {

                    $return[$index] = $values[$key];

                }

            } elseif ($preserve) {

                $return[$key] = $value;

            }

        }

        return $return;

    }

    /**

     * Assembles a URL path defined by this route

     *

     * @param  array $data An array of name (or index) and value pairs used as parameters

     * @return string Route path with user submitted parameters

     */

    public function assemble($data = array(), $reset = false, $encode = false, $partial = false)

    {

        if ($this->_reverse === null) {

            require_once 'Zend/Controller/Router/Exception.php';

            throw new Zend_Controller_Router_Exception('Cannot assemble. Reversed route is not specified.');

        }

        $defaultValuesMapped  = $this->_getMappedValues($this->_defaults, true, false);

        $matchedValuesMapped  = $this->_getMappedValues($this->_values, true, false);

        $dataValuesMapped     = $this->_getMappedValues($data, true, false);

        // handle resets, if so requested (By null value) to do so

        if (($resetKeys = array_search(null, $dataValuesMapped, true)) !== false) {

            foreach ((array) $resetKeys as $resetKey) {

                if (isset($matchedValuesMapped[$resetKey])) {

                    unset($matchedValuesMapped[$resetKey]);

                    unset($dataValuesMapped[$resetKey]);

                }

            }

        }

        // merge all the data together, first defaults, then values matched, then supplied

        $mergedData = $defaultValuesMapped;

        $mergedData = $this->_arrayMergeNumericKeys($mergedData, $matchedValuesMapped);

        $mergedData = $this->_arrayMergeNumericKeys($mergedData, $dataValuesMapped);

        if ($encode) {

            foreach ($mergedData as $key => &$value) {

                $value = urlencode($value);

            }

        }

        ksort($mergedData);

        $return = @vsprintf($this->_reverse, $mergedData);

        if ($return === false) {

            require_once 'Zend/Controller/Router/Exception.php';

            throw new Zend_Controller_Router_Exception('Cannot assemble. Too few arguments?');

        }

        return $return;

    }

    /**

     * Return a single parameter of route's defaults

     *

     * @param string $name Array key of the parameter

     * @return string Previously set default

     */

    public function getDefault($name) {

        if (isset($this->_defaults[$name])) {

            return $this->_defaults[$name];

        }

    }

    /**

     * Return an array of defaults

     *

     * @return array Route defaults

     */

    public function getDefaults() {

        return $this->_defaults;

    }

    /**

     * Get all variables which are used by the route

     *

     * @return array

     */

    public function getVariables()

    {

        $variables = array();

        foreach ($this->_map as $key => $value) {

            if (is_numeric($key)) {

                $variables[] = $value;

            } else {

                $variables[] = $key;

            }

        }

        return $variables;

    }

    /**

     * _arrayMergeNumericKeys() - allows for a strict key (numeric's included) array_merge.

     * php's array_merge() lacks the ability to merge with numeric keys.

     *

     * @param array $array1

     * @param array $array2

     * @return array

     */

    protected function _arrayMergeNumericKeys(Array $array1, Array $array2)

    {

        $returnArray = $array1;

        foreach ($array2 as $array2Index => $array2Value) {

            $returnArray[$array2Index] = $array2Value;

        }

        return $returnArray;

    }

}