<?php
//
// +----------------------------------------------------------------------+
// |zen-cart Open Source E-commerce                                       |
// +----------------------------------------------------------------------+
// | Copyright (c) 2003 The zen-cart developers                           |
// |                                                                      |
// | http://www.zen-cart.com/index.php                                    |
// |                                                                      |
// | Portions Copyright (c) 2003 osCommerce                               |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the GPL license,       |
// | that is bundled with this package in the file LICENSE, and is        |
// | available through the world-wide-web at the following url:           |
// | http://www.zen-cart.com/license/2_0.txt.                             |
// | If you did not receive a copy of the zen-cart license and are unable |
// | to obtain it through the world-wide-web, please send a note to       |
// | license@zen-cart.com so we can mail you a copy immediately.          |
// +----------------------------------------------------------------------+
// $Id: navigation_history.php,v 1.1.1.1 2004/09/01 04:47:50 shidairiki Exp $
//

  class navigationHistory {
    var $path, $snapshot;

    function navigationHistory() {
      $this->reset();
    }

    function reset() {
      $this->path = array();
      $this->snapshot = array();
    }

    function add_current_page() {
      global $request_type, $cPath;

      if (is_array($_GET)) {
        reset($_GET);
        while (list($key, $value) = each($_GET)) {
          if ($key != 'main_page') {
            $get_vars[$key] = $value;
          }
        }
      }

      $set = 'true';
      for ($i=0, $n=sizeof($this->path); $i<$n; $i++) {
        if ( ($this->path[$i]['page'] == $_GET['main_page']) ) {
          if (isset($cPath)) {
            if (!isset($this->path[$i]['get']['cPath'])) {
              continue;
            } else {
              if ($this->path[$i]['get']['cPath'] == $cPath) {
                array_splice($this->path, ($i+1));
                $set = 'false';
                break;
              } else {
                $old_cPath = explode('_', $this->path[$i]['get']['cPath']);
                $new_cPath = explode('_', $cPath);

                for ($j=0, $n2=sizeof($old_cPath); $j<$n2; $j++) {
                  if ($old_cPath[$j] != $new_cPath[$j]) {
                    array_splice($this->path, ($i));
                    $set = 'true';
                    break 2;
                  }
                }
              }
            }
          } else {
            array_splice($this->path, ($i));
            $set = 'true';
            break;
          }
        }
      }

      if ($set == 'true') {
        if ($_GET['main_page']) {
          $page = $_GET['main_page'];
        } else {
            $page = 'index';
        }
        $this->path[] = array('page' => $page,
                              'mode' => $request_type,
                              'get' => $get_vars,
                              'post' => $_POST);
      }
    }

    function remove_current_page() {

      $last_entry_position = sizeof($this->path) - 1;
      if ($this->path[$last_entry_position]['page'] == $_GET['main_page']) {
        unset($this->path[$last_entry_position]);
      }
    }

    function set_snapshot($page = '') {
      global $request_type;

      if (is_array($page)) {
        $this->snapshot = array('page' => $page['page'],
                                'mode' => $page['mode'],
                                'get' => $page['get'],
                                'post' => $page['post']);
      } else {
        reset($_GET);
        while (list($key, $value) = each($_GET)) {
          if ($key != 'main_page') {
            $get_vars[$key] = $value;
          }
        }
        if ($_GET['main_page']) {
          $page = $_GET['main_page'];
        } else {
          $page = 'index';
        }
        $this->snapshot = array('page' => $page,
                                'mode' => $request_type,
                                'get' => $get_vars,
                                'post' => $_POST);
      }
    }

    function clear_snapshot() {
      $this->snapshot = array();
    }

    function set_path_as_snapshot($history = 0) {
      $pos = (sizeof($this->path)-1-$history);
      $this->snapshot = array('page' => $this->path[$pos]['page'],
                              'mode' => $this->path[$pos]['mode'],
                              'get' => $this->path[$pos]['get'],
                              'post' => $this->path[$pos]['post']);
    }

    function debug() {
      for ($i=0, $n=sizeof($this->path); $i<$n; $i++) {
        echo $this->path[$i]['page'] . '?';
        while (list($key, $value) = each($this->path[$i]['get'])) {
          echo $key . '=' . $value . '&';
        }
        if (sizeof($this->path[$i]['post']) > 0) {
          echo '<br />';
          while (list($key, $value) = each($this->path[$i]['post'])) {
            echo '&nbsp;&nbsp;<strong>' . $key . '=' . $value . '</strong><br />';
          }
        }
        echo '<br />';
      }

      if (sizeof($this->snapshot) > 0) {
        echo '<br /><br />';

        echo $this->snapshot['mode'] . ' ' . $this->snapshot['page'] . '?' . zen_array_to_string($this->snapshot['get'], array(zen_session_name())) . '<br />';
      }
    }

    function unserialize($broken) {
      for(reset($broken);$kv=each($broken);) {
        $key=$kv['key'];
        if (gettype($this->$key)!="user function")
        $this->$key=$kv['value'];
      }
    }
  }
?>
