class.ilECSCategoryMapping.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. |
        +-----------------------------------------------------------------------------+
*/

include_once './Services/WebServices/ECS/classes/class.ilECSCategoryMappingRule.php';

class ilECSCategoryMapping
{
        private static $cached_active_rules = null;

        public static function getActiveRules()
        {
                global $ilDB;
                
                $res = $ilDB->query('SELECT mapping_id FROM ecs_container_mapping');
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $rules[] = new ilECSCategoryMappingRule($row->mapping_id);
                }
                return $rules ? $rules : array();
        }
        
        public static function getMatchingCategory(ilECSEContent $econtent)
        {
                global $ilLog;
                
                if(is_null(self::$cached_active_rules))
                {
                        self::$cached_active_rules = self::getActiveRules();
                }
                foreach(self::$cached_active_rules as $rule)
                {
                        if($rule->matches($econtent))
                        {
                                $ilLog->write(__METHOD__.': Found assignment for field type: '.$rule->getFieldName());
                                return $rule->getContainerId();
                        }
                        $ilLog->write(__METHOD__.': Category assignment failed for field: '.$rule->getFieldName());
                }
                // Return default container
                $ilLog->write(__METHOD__.': Using default container');
                return ilECSSettings::_getInstance()->getImportId();
        }
        
         public static function handleUpdate(ilECSEContent $econtent,$a_obj_id)
         {
                global $tree,$ilLog;
                
                $a_ref_id = current(ilObject::_getAllReferences($a_obj_id));
                
                $references = ilObject::_getAllReferences(ilObject::_lookupObjId($a_ref_id));
                $cat = self::getMatchingCategory($econtent);
                $all_cats = self::lookupHandledCategories();
                
                
                $exists = false;
                foreach($references as $ref_id => $null)
                {
                        if($tree->getParentId($ref_id) == $cat)
                        {
                                $exists = true;
                        }
                }
                $ilLog->write(__METHOD__.': Creating/Deleting references...');          
                include_once './classes/class.ilObjectFactory.php';
                
                if(!$exists)
                {
                        $ilLog->write(__METHOD__.': Add new reference. STEP 1');
                        
                        if($obj_data = ilObjectFactory::getInstanceByRefId($a_ref_id,false))
                        {
                                $new_ref_id = $obj_data->createReference();
                                $obj_data->putInTree($cat);
                                $obj_data->setPermissions($cat);
                                $ilLog->write(__METHOD__.': Add new reference.');
                        }
                }
                // Now delete old references
                foreach($references as $ref_id => $null)
                {
                        $parent = $tree->getParentId($ref_id);
                        if($parent == $cat)
                        {
                                continue;
                        }
                        if(!in_array($parent,$all_cats))
                        {
                                continue;
                        }
                        if($to_delete = ilObjectFactory::getInstanceByRefId($ref_id))
                        {
                                $to_delete->delete();
                                $ilLog->write(__METHOD__.': Deleted deprecated reference.');
                        }
                }
                return true;
        }
         
        public static function lookupHandledCategories()
        {
                global $ilDB;
                
                $res = $ilDB->query("SELECT container_id FROM ecs_container_mapping ");
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $ref_ids[] = $row->container_id;
                }
                return $ref_ids ? $ref_ids : array();
        }

        public static function getPossibleFields()
        {
                return array(
                        'part_id',
                        'study_courses',
                        'courseType',
                        'term',
                        'credits',
                        'begin');
        }
}
?>