<?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

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

 */

/** Zend_Controller_Router_Interface */

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

/**

 * Simple first implementation of a router, to be replaced

 * with rules-based URI processor.

 *

 * @category   Zend

 * @package    Zend_Controller

 * @subpackage Router

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

 */

abstract class Zend_Controller_Router_Abstract implements Zend_Controller_Router_Interface

{

    /**

     * Front controller instance

     * @var Zend_Controller_Front

     */

    protected $_frontController;

    /**

     * Array of invocation parameters to use when instantiating action

     * controllers

     * @var array

     */

    protected $_invokeParams = array();

    /**

     * Constructor

     *

     * @param array $params

     * @return void

     */

    public function __construct(array $params = array())

    {

        $this->setParams($params);

    }

    /**

     * Add or modify a parameter to use when instantiating an action controller

     *

     * @param string $name

     * @param mixed $value

     * @return Zend_Controller_Router

     */

    public function setParam($name, $value)

    {

        $name = (string) $name;

        $this->_invokeParams[$name] = $value;

        return $this;

    }

    /**

     * Set parameters to pass to action controller constructors

     *

     * @param array $params

     * @return Zend_Controller_Router

     */

    public function setParams(array $params)

    {

        $this->_invokeParams = array_merge($this->_invokeParams, $params);

        return $this;

    }

    /**

     * Retrieve a single parameter from the controller parameter stack

     *

     * @param string $name

     * @return mixed

     */

    public function getParam($name)

    {

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

            return $this->_invokeParams[$name];

        }

        return null;

    }

    /**

     * Retrieve action controller instantiation parameters

     *

     * @return array

     */

    public function getParams()

    {

        return $this->_invokeParams;

    }

    /**

     * Clear the controller parameter stack

     *

     * By default, clears all parameters. If a parameter name is given, clears

     * only that parameter; if an array of parameter names is provided, clears

     * each.

     *

     * @param null|string|array single key or array of keys for params to clear

     * @return Zend_Controller_Router

     */

    public function clearParams($name = null)

    {

        if (null === $name) {

            $this->_invokeParams = array();

        } elseif (is_string($name) && isset($this->_invokeParams[$name])) {

            unset($this->_invokeParams[$name]);

        } elseif (is_array($name)) {

            foreach ($name as $key) {

                if (is_string($key) && isset($this->_invokeParams[$key])) {

                    unset($this->_invokeParams[$key]);

                }

            }

        }

        return $this;

    }

    /**

     * Retrieve Front Controller

     *

     * @return Zend_Controller_Front

     */

    public function getFrontController()

    {

        // Used cache version if found

        if (null !== $this->_frontController) {

            return $this->_frontController;

        }

        require_once 'Zend/Controller/Front.php';

        $this->_frontController = Zend_Controller_Front::getInstance();

        return $this->_frontController;

    }

    /**

     * Set Front Controller

     *

     * @param Zend_Controller_Front $controller

     * @return Zend_Controller_Router_Interface

     */

    public function setFrontController(Zend_Controller_Front $controller)

    {

        $this->_frontController = $controller;

        return $this;

    }

}