class_session.inc

<?php
/*
  This code is part of FusionDirectory (http://www.fusiondirectory.org/)
  Copyright (C) 2003-2010  Cajus Pollmeier
  Copyright (C) 2011-2014  FusionDirectory

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*/

/*!
 * \file class_session.inc
 * Source code for class session
 */

/*!
 * \brief This class contains all the function needed to manage sessions
 */
class session {
  /*!
   * \brief Check if the name of the session is set
   *
   * \param string $name The name of the session
   */
  public static function is_set($name)
  {
    $channel = "";
    if (isset($_POST['_channel_'])) {
      $channel = $_POST['_channel_'];
    }

    /* Global fallback if not set */
    if ($channel == "") {
      return isset($_SESSION[$name]);
    }

    /* Sanity check */
    if (!session::channel_exists($channel)) {
      msg_dialog::display(_("Internal error"), _("Requested channel does not exist! Please contact your Administrator."), FATAL_ERROR_DIALOG);
    }

    $channel = "gch_".$channel;
    return isset($_SESSION[$channel][$name]);
  }

  /*!
   * \brief Check if a session is defined
   *
   * \param string $name Name of the session
   */
  public static function global_is_set($name)
  {
    return isset($_SESSION[$name]);
  }

  /*!
   * \brief Set a value in a session
   *
   * \param string $name Name of the session