class.ilMemberViewSettings.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
        |                                                                             |
        | 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/

class ilMemberViewSettings
{
        private static $instance = null;
        
        private $active = false;
        private $enabled = false;
        private $container = null;
        private $container_items = array();
        
        private function __construct()
        {
                $this->read();
        }
        
        public static function getInstance()
        {
                if(self::$instance != null)
                {
                        return self::$instance;
                }
                return self::$instance = new ilMemberViewSettings();
        }
        
    public function getContainer()
    {
        return $this->container;
    }
    
    public function setContainer($container)
    {
        $this->container = $container;
                $_SESSION['member_view_container'] = $this->container;
                $_SESSION['il_cont_admin_panel'] = false;
    }

        public function isActive()
        {
                global $tree;
                
                if(!$this->active)
                {
                        // Not active
                        return false;
                }
                                
                $ref_id = $_GET['ref_id'] ? $_GET['ref_id'] : null;
                if(!$ref_id)
                {
                        $target_arr = explode('_',(string) $_GET['target']);
                        $ref_id = $target_arr[1] ? $target_arr[1] : null;               
                }               

                if(!$ref_id)
                {
                        // No ref id given => mail, search, personal desktop menu in other tab
                        return false;
                }
                
                if(!in_array($ref_id,$this->container_items) and 
                        $this->getContainer() != $ref_id) 
                {
                        // outside of course
                        return false;
                }
                return true;
        }
        
        public function isActiveForRefId($a_ref_id)
        {
                if(!$this->active || !(int)$a_ref_id)
                {
                        // Not active
                        return false;
                }
                
                if(!in_array($a_ref_id,$this->container_items) and 
                        $this->getContainer() != $a_ref_id) 
                {
                        // outside of course
                        return false;
                }
                return true;
        }
        
        public function activate($a_ref_id)
        {
                $this->active = true;
                $this->setContainer($a_ref_id);
        }
        
        public function deactivate()
        {
                $this->active = false;
                $this->container = null;
                unset($_SESSION['member_view_container']);
        }
        
        public function toggleActivation($a_ref_id,$a_activation)
        {
                if($a_activation)
                {
                        return $this->activate($a_ref_id);
                }
                else
                {
                        return $this->deactivate($a_ref_id);
                }
        }
        
        public function isEnabled()
        {
                return (bool) $this->enabled;
        }
        
        protected function read()
        {
                global $ilSetting,$tree;
                
                // member view is always enabled 
                // (2013-06-18, http://www.ilias.de/docu/goto_docu_wiki_1357_Reorganising_Administration.html)          
                
                // $this->enabled = $ilSetting->get('preview_learner');         
                $this->enabled = true;
                
                if(isset($_SESSION['member_view_container']))
                {
                        $this->active = true;
                        $this->container = (int) $_SESSION['member_view_container'];
                        $this->container_items = $tree->getSubTreeIds($this->getContainer());
                }
        } 
}
?>