class.ilSoapLearningProgressAdministration.php

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<?php

/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once './webservice/soap/classes/class.ilSoapAdministration.php';

class ilSoapLearningProgressAdministration extends ilSoapAdministration
{
        protected static $DELETE_PROGRESS_FILTER_TYPES = array('sahs', 'tst');
        
        const PROGRESS_FILTER_ALL = 0;
        const PROGRESS_FILTER_IN_PROGRESS = 1;
        const PROGRESS_FILTER_COMPLETED = 2;
        const PROGRESS_FILTER_FAILED = 3;
        
        const USER_FILTER_ALL = -1;
        
        public function deleteProgress($sid, $ref_ids, $usr_ids, $type_filter, $progress_filter)
        {
                $this->initAuth($sid);
                $this->initIlias();

                // Check session
                if(!$this->__checkSession($sid))
                {
                        return $this->__raiseError($this->__getMessage(),$this->__getMessageCode());
                }
                
                // Check filter
                if(array_diff((array) $type_filter, self::$DELETE_PROGRESS_FILTER_TYPES))
                {
                        return $this->__raiseError('Invalid filter type given', 'Client');
                }
                
                include_once 'Services/User/classes/class.ilObjUser.php';
                if(!in_array(self::USER_FILTER_ALL, $usr_ids) and !ilObjUser::userExists($usr_ids))
                {
                        return $this->__raiseError('Invalid user ids given', 'Client');
                }
                
                $valid_refs = array();
                foreach((array) $ref_ids as $ref_id)
                {
                        $obj_id = ilObject::_lookupObjId($ref_id);
                        $type = ilObject::_lookupType($obj_id);
                        
                        // All containers
                        if($GLOBALS['objDefinition']->isContainer($type))
                        {
                                $all_sub_objs = array();
                                foreach(($type_filter) as $type_filter_item)
                                {
                                        $sub_objs = $GLOBALS['tree']->getSubTree(
                                                $GLOBALS['tree']->getNodeData($ref_id),
                                                false,
                                                $type_filter_item
                                        );
                                        $all_sub_objs = array_merge($all_sub_objs, $sub_objs);
                                }
                                
                                foreach($all_sub_objs as $child_ref)
                                {
                                        $child_type = ilObject::_lookupType(ilObject::_lookupObjId($child_ref));
                                        if(!$GLOBALS['ilAccess']->checkAccess('write', '', $child_ref))
                                        {
                                                return $this->__raiseError('Permission denied for : '. $ref_id.' -> type '.$type, 'Client');
                                        }
                                        $valid_refs[] = $child_ref;
                                }
                                
                        }
                        elseif(in_array($type, $type_filter))
                        {
                                if(!$GLOBALS['ilAccess']->checkAccess('write','',$ref_id))
                                {
                                        return $this->__raiseError('Permission denied for : '. $ref_id.' -> type '.$type, 'Client');
                                }
                                $valid_refs[] = $ref_id;
                        }
                        else
                        {
                                return $this->__raiseError('Invalid object type given for : '. $ref_id.' -> type '.$type, 'Client');
                        }
                }
                
                // Delete tracking data
                foreach($valid_refs as $ref_id)
                {
                        include_once './Services/Object/classes/class.ilObjectFactory.php';
                        $obj = ilObjectFactory::getInstanceByRefId($ref_id, false);
                        
                        if(!$obj instanceof ilObject)
                        {
                                return $this->__raiseError('Invalid reference id given : '. $ref_id.' -> type '.$type, 'Client');
                        }
                        
                        // filter users
                        $valid_users = $this->applyProgressFilter($obj->getId(), (array) $usr_ids, (array) $progress_filter);
                        
                        switch($obj->getType())
                        {
                                case 'sahs':
                                        include_once './Modules/ScormAicc/classes/class.ilObjSAHSLearningModule.php';
                                        $subtype = ilObjSAHSLearningModule::_lookupSubType($obj->getId());
                                        
                                        switch($subtype)
                                        {
                                                case 'scorm':
                                                        $this->deleteScormTracking($obj->getId(),(array) $valid_users);
                                                        break;
                                                        
                                                case 'scorm2004':
                                                        $this->deleteScorm2004Tracking($obj->getId(), (array) $valid_users);
                                                        break;
                                        }
                                        break;
                                        
                                case 'tst':
                                        $obj->removeTestResultsByUserIds(array_values((array)$valid_users));
                                        break;
                        }
                        
                        // Refresh status
                        include_once './Services/Tracking/classes/class.ilLPStatusWrapper.php';
                        ilLPStatusWrapper::_resetInfoCaches($obj->getId());
                        ilLPStatusWrapper::_refreshStatus($obj->getId(), $valid_users);
                        
                }
                return true;
        }
        
        protected function applyProgressFilter($obj_id, Array $usr_ids, Array $filter)
        {
                include_once './Services/Tracking/classes/class.ilLPStatusWrapper.php';
                

                $all_users = array();
                if(in_array(self::USER_FILTER_ALL, $usr_ids))
                {
                        $all_users = array_unique(
                                        array_merge(
                                                ilLPStatusWrapper::_getInProgress($obj_id),
                                                ilLPStatusWrapper::_getCompleted($obj_id),
                                                ilLPStatusWrapper::_getFailed($obj_id)
                                        )
                                );
                }
                else
                {
                        $all_users = $usr_ids;
                }

                if(!$filter or in_array(self::PROGRESS_FILTER_ALL, $filter))
                {
                        $GLOBALS['log']->write(__METHOD__.': Deleting all progress data');
                        return $all_users;
                }
                
                $filter_users = array();
                if(in_array(self::PROGRESS_FILTER_IN_PROGRESS, $filter))
                {
                        $GLOBALS['log']->write(__METHOD__.': Filtering  in progress.');
                        $filter_users = array_merge($filter, ilLPStatusWrapper::_getInProgress($obj_id));
                }
                if(in_array(self::PROGRESS_FILTER_COMPLETED, $filter))
                {
                        $GLOBALS['log']->write(__METHOD__.': Filtering  completed.');
                        $filter_users = array_merge($filter, ilLPStatusWrapper::_getCompleted($obj_id));
                }
                if(in_array(self::PROGRESS_FILTER_FAILED, $filter))
                {
                        $GLOBALS['log']->write(__METHOD__.': Filtering  failed.');
                        $filter_users = array_merge($filter, ilLPStatusWrapper::_getFailed($obj_id));
                }
                
                // Build intersection
                return array_intersect($all_users, $filter_users);
        }
        
        protected function deleteScormTracking($a_obj_id, $a_usr_ids)
        {
                global $ilDB;
                
                $query = 'DELETE FROM scorm_tracking '.
                        'WHERE '.$ilDB->in('user_id',$a_usr_ids,false,'integer').' '.
                        'AND obj_id = '. $ilDB->quote($a_obj_id,'integer').' ';
                $res = $ilDB->manipulate($query);
                return true;
        }
        
        protected function deleteScorm2004Tracking($a_obj_id, $a_usr_ids)
        {
                global $ilDB;
                
                $query = 'SELECT cp_node_id FROM cp_node '.
                        'WHERE nodename = '. $ilDB->quote('item','text').' '.
                        'AND cp_node.slm_id = '.$ilDB->quote($a_obj_id,'integer');
                $res = $ilDB->query($query);
                
                $scos = array();
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $scos[] = $row->cp_node_id;
                }
                
                $query = 'DELETE FROM cmi_node '.
                                'WHERE '.$ilDB->in('user_id',(array) $a_usr_ids,false,'integer').' '.
                                'AND '.$ilDB->in('cp_node_id',$scos,false,'integer');
                $ilDB->manipulate($query);
        
        }
        
        public function getLearningProgressChanges($sid, $timestamp, $include_ref_ids, $type_filter)
        {
                $this->initAuth($sid);
                $this->initIlias();

                if(!$this->__checkSession($sid))
                {
                        return $this->__raiseError($this->__getMessage(),$this->__getMessageCode());
                }
                global $rbacsystem, $tree, $ilLog;

                // check administrator
                $types = "";
                if (is_array($type_filter))
                {
                        $types = implode($type_filter, ",");
                }
                
                // output lp changes as xml
                try
                {
                        include_once './Services/Tracking/classes/class.ilLPXmlWriter.php';
                        $writer = new ilLPXmlWriter(true);
                        $writer->setTimestamp($timestamp);
                        $writer->setIncludeRefIds($include_ref_ids);
                        $writer->setTypeFilter($type_filter);
                        $writer->write();
                
                        return $writer->xmlDumpMem(true);
                }
                catch(UnexpectedValueException $e)
                {
                        return $this->__raiseError($e->getMessage(), 'Client');
                }
        }

}
?>