class.ilLOTestAssignments.php

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

class ilLOTestAssignments
{
        private static $instances = array();
        
        private $container_id = 0;
        private $assignments = array();
        
        private $settings = null;
        
        
        public function __construct($a_container_id)
        {
                $this->container_id = $a_container_id;
                
                include_once './Modules/Course/classes/Objectives/class.ilLOSettings.php';
                $this->settings = ilLOSettings::getInstanceByObjId($a_container_id);
                $this->readTestAssignments();
                
        }
        
        public static function getInstance($a_container_id)
        {
                if(self::$instances[$a_container_id])
                {
                        return self::$instances[$a_container_id];
                }
                return self::$instances[$a_container_id] = new self($a_container_id);
        }
        
        public static function lookupContainerForTest($a_test_ref_id)
        {
                global $ilDB;
                
                $query = 'SELECT container_id FROM loc_tst_assignments '.
                                'WHERE tst_ref_id = '.$ilDB->quote($a_test_ref_id,'integer');
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        return $row->container_id;
                }
                return 0;
        }
        
        public function getContainerId()
        {
                return $this->container_id;
        }
        
        public function getSettings()
        {
                return $this->settings;
        }
        
        public function getAssignments()
        {
                return $this->assignments;
        }

        public static function deleteByContainer($a_container_id)
        {
                global $ilDB;
                
                $query = 'DELETE FROM loc_tst_assignments '.
                                'WHERE container_id = '.$ilDB->quote($a_container_id,'integer');
                $ilDB->manipulate($query);
        }
        
        public function getAssignmentsByType($a_type)
        {
                $by_type = array();
                foreach($this->assignments as $assignment)
                {
                        if($assignment->getAssignmentType() == $a_type)
                        {
                                $by_type[] = $assignment;
                        }
                }
                return $by_type;
        }
        
        public function getTests()
        {
                $tests = array();
                if($this->getSettings()->getInitialTest())
                {
                        $tests[] = $this->getSettings()->getInitialTest();
                }
                if($this->getSettings()->getQualifiedTest())
                {
                        $tests[] = $this->getSettings()->getQualifiedTest();
                }
                foreach($this->assignments as $assignment)
                {
                        $tests[] = $assignment->getTestRefId();
                }
                return $tests;
        }

        public function getTestByObjective($a_objective_id, $a_type)
        {
                switch($a_type)
                {
                        case ilLOSettings::TYPE_TEST_INITIAL:
                                if(!$this->getSettings()->hasSeparateInitialTests())
                                {
                                        return $this->getSettings()->getInitialTest();
                                }
                                break;
                                
                        case ilLOSettings::TYPE_TEST_QUALIFIED:
                                if(!$this->getSettings()->hasSeparateQualifiedTests())
                                {
                                        return $this->getSettings()->getQualifiedTest();
                                }
                                break;
                }
                                
                $assignment = $this->getAssignmentByObjective($a_objective_id, $a_type);
                if($assignment)
                {
                        return $assignment->getTestRefId();
                }
                return 0;
        }
        
        public function isSeparateTest($a_test_ref_id)
        {
                if(!$this->getSettings()->hasSeparateInitialTests())
                {
                        if($this->getSettings()->getInitialTest() == $a_test_ref_id)
                        {
                                return FALSE;
                        }
                }
                if(!$this->getSettings()->hasSeparateQualifiedTests())
                {
                        if($this->getSettings()->getQualifiedTest() == $a_test_ref_id)
                        {
                                return FALSE;
                        }
                }
                return TRUE;
        }
        
        public function getTypeByTest($a_test_ref_id)
        {
                if($this->getSettings()->worksWithInitialTest() && !$this->getSettings()->hasSeparateInitialTests())
                {
                        if($this->getSettings()->getInitialTest() == $a_test_ref_id)
                        {
                                return ilLOSettings::TYPE_TEST_INITIAL;
                        }
                }
                elseif($this->getSettings()->worksWithInitialTest())
                {
                        foreach($this->assignments as $assignment)
                        {
                                if($assignment->getTestRefId() == $a_test_ref_id)
                                {
                                        return ilLOSettings::TYPE_TEST_INITIAL;
                                }
                        }
                        
                }
                if(!$this->getSettings()->hasSeparateQualifiedTests())
                {
                        if($this->getSettings()->getQualifiedTest() == $a_test_ref_id)
                        {
                                return ilLOSettings::TYPE_TEST_QUALIFIED;
                        }
                }
                else
                {
                        foreach($this->assignments as $assignment)
                        {
                                if($assignment->getTestRefId() == $a_test_ref_id)
                                {
                                        return ilLOSettings::TYPE_TEST_QUALIFIED;
                                }
                        }
                }
                return ilLOSettings::TYPE_TEST_UNDEFINED;
        }
        
        
        public function getAssignmentByObjective($a_objective_id, $a_type)
        {
                
                foreach($this->assignments as $assignment)
                {
                        if(
                                ($assignment->getObjectiveId() == $a_objective_id) &&
                                ($assignment->getAssignmentType() == $a_type)
                        )
                        {
                                return $assignment;
                        }
                }
                return FALSE;
        }
        
        protected function readTestAssignments()
        {
                global $ilDB;

                $query = 'SELECT assignment_id FROM loc_tst_assignments '.
                                'WHERE container_id = '.$ilDB->quote($this->getContainerId(),'integer');
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        include_once './Modules/Course/classes/Objectives/class.ilLOTestAssignment.php';
                        $assignment = new ilLOTestAssignment($row->assignment_id);
                        
                        $this->assignments[] = $assignment;
                }
        }
        
        public function toXml(ilXmlWriter $writer, $a_objective_id)
        {
                foreach($this->getAssignments() as $assignment)
                {
                        if($assignment->getObjectiveId() != $a_objective_id)
                        {
                                continue;
                        }
                        
                        include_once './Modules/Course/classes/Objectives/class.ilLOXmlWriter.php';
                        $writer->xmlElement(
                                'Test',
                                array(
                                        'type' => ilLOXmlWriter::TYPE_TST_PO,
                                        'refId' => $assignment->getTestRefId(),
                                        'testType' => $assignment->getAssignmentType()
                                )
                        );
                }
        }
        
        
        public static function lookupObjectivesForTest($a_test_ref_id)
        {
                global $ilDB;
                
                $objectives = array();
                
                $query = 'SELECT objective_id FROM loc_tst_assignments '.
                                'WHERE tst_ref_id = '.$ilDB->quote($a_test_ref_id,'integer');
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        $objectives[] =  $row->objective_id;
                }
                return $objectives;
        }
}
?>