class.ilCalendarHidden.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2006 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 ilCalendarHidden
{
        protected static $instances = array();
        
        protected $user_id;
        protected $hidden = array();
        
        protected $db;

        private function __construct($a_user_id)
        {
                global $ilDB;
                
                $this->db = $ilDB;
                $this->user_id = $a_user_id;
                $this->read();
        }
        
        public static function _getInstanceByUserId($a_user_id)
        {
                if(isset(self::$instances[$a_user_id]))
                {
                        return self::$instances[$a_user_id];
                }
                return self::$instances[$a_user_id] = new ilCalendarHidden($a_user_id); 
        }
        
        public static function _deleteCategories($a_cat_id)
        {
                global $ilDB;
                
                $query = "DELETE FROM cal_categories_hidden ".
                        "WHERE cat_id = ".$ilDB->quote($a_cat_id)." ";
                $ilDB->query($query);
        }
        
        public static function _deleteUser($a_user_id)
        {
                global $ilDB;
                
                $query = "DELETE FROM cal_categories_hidden ".
                        "WHERE user_id = ".$ilDB->quote($a_user_id)." ";
                $ilDB->query($query);
        }
        
        public function filterHidden($categories,$category_info)
        {
                foreach($category_info as $cat_id => $info)
                {
                        if($this->isHidden($cat_id))
                        {
                                $hidden = array_merge((array) $hidden,(array) $info['subitem_ids'],array($cat_id));
                        }
                }
                return (array) array_diff((array) $categories, (array) $hidden);
        }
        
        public function isHidden($a_cat_id)
        {
                return in_array($a_cat_id, $this->hidden);
        }
        
        public function isAppointmentVisible($a_cal_id)
        {
                include_once('./Services/Calendar/classes/class.ilCalendarCategoryAssignments.php');
                
                foreach(ilCalendarCategoryAssignments::_lookupCategories($a_cal_id) as $cat_id)
                {
                        if(in_array($cat_id,$this->hidden))
                        {
                                return true;
                        }
                }
                return false;
        }
        
        public function getHidden()
        {
                return $this->hidden ? $this->hidden : array();
        }
        
        
        
        public function hideSelected($a_hidden)
        {
                $this->hidden = $a_hidden;
                return true;
        }
        
        public function save()
        {
                $this->delete();
                foreach($this->hidden as $hidden)
                {
                        $query = "INSERT INTO cal_categories_hidden ".
                                "SET user_id = ".$this->db->quote($this->user_id).", ".
                                "cat_id = ".$this->db->quote($hidden)." ";
                        $this->db->query($query);
                }
                return true;
        }
        
        public function delete($a_cat_id = null)
        {
                if($a_cat_id)
                {
                        $query = "DELETE FROM cal_categories_hidden ".
                                "WHERE user_id = ".$this->db->quote($this->user_id)." ".
                                "AND cat_id = ".$this->db->quote($a_cat_id)." ";
                }
                else
                {
                        $query = "DELETE FROM cal_categories_hidden ".
                                "WHERE user_id = ".$this->db->quote($this->user_id)." ";
                }
                $this->db->query($query);
                return true;
        }
        
        protected function read()
        {
                $query = "SELECT * FROM cal_categories_hidden ".
                        "WHERE user_id = ".$this->db->quote($this->user_id)." ";
                $res = $this->db->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $this->hidden[] = $row->cat_id;
                }
                return true;
        }
}
?>