class.ilCourseObjective.php

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<?php

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

class ilCourseObjective
{
        var $db = null;

        var $course_obj = null;
        var $objective_id = null;
        
        // begin-patch lok
        protected $active = true;
        protected $passes = 0;
        // end-patch lok
        
        public function __construct($course_obj,$a_objective_id = 0)
        {
                global $ilDB;

                $this->db = $ilDB;
                $this->course_obj = $course_obj;

                $this->objective_id = $a_objective_id;
                if($this->objective_id)
                {
                        $this->__read();
                }
        }
        
        public function getCourse()
        {
                return $this->course_obj;
        }
        
        public static function _lookupContainerIdByObjectiveId($a_objective_id)
        {
                global $ilDB;
                
                $query = "SELECT crs_id FROM crs_objectives ".
                        "WHERE objective_id = ".$ilDB->quote($a_objective_id ,'integer');
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        return $row->crs_id;
                }
                return false;
        }
        
        // begin-patch lok
        public static function _getCountObjectives($a_obj_id,$a_activated_only = false)
        {
                return count(ilCourseObjective::_getObjectiveIds($a_obj_id,$a_activated_only));
        }
        
        public static function lookupMaxPasses($a_objective_id)
        {
                global $ilDB;
                
                $query = 'SELECT passes from crs_objectives '.
                                'WHERE objective_id = '.$ilDB->quote($a_objective_id,'integer');
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        return (int) $row->passes;
                }
                return 0;
        }
        
        public static function lookupObjectiveTitle($a_objective_id, $a_add_description = false)
        {
                global $ilDB;
                
                $query = 'SELECT title,description from crs_objectives '.
                                'WHERE objective_id = '.$ilDB->quote($a_objective_id,'integer');
                $res = $ilDB->query($query);
                while($row = $ilDB->fetchAssoc($res))
                {
                        if(!$a_add_description)
                        {
                                return $row['title'];                           
                        }
                        else
                        {
                                return $row;
                        }
                }
                return "";
        }
        // end-patch lok
        
        public function ilClone($a_target_id,$a_copy_id)
        {
                global $ilLog;
                
                ilLoggerFactory::getLogger('crs')->debug('Start cloning learning objectives');
                
                $query = "SELECT * FROM crs_objectives ".
                        "WHERE crs_id  = ".$this->db->quote($this->course_obj->getId() ,'integer').' '.
                        "ORDER BY position ";
                $res = $this->db->query($query);
                if(!$res->numRows())
                {
                        ilLoggerFactory::getLogger('crs')->debug('.. no objectives found');
                        return true;
                }
                
                if(!is_object($new_course = ilObjectFactory::getInstanceByRefId($a_target_id,false)))
                {
                        ilLoggerFactory::getLogger('crs')->warning('Cannot create course instance');
                        return true;
                }
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        $new_objective = new ilCourseObjective($new_course);
                        $new_objective->setTitle($row->title);
                        $new_objective->setDescription($row->description);
                        $new_objective->setActive($row->active);
                        $objective_id = $new_objective->add();
                        ilLoggerFactory::getLogger('crs')->debug('Added new objective nr: ' . $objective_id);
                        
                        // Clone crs_objective_tst entries
                        include_once('Modules/Course/classes/class.ilCourseObjectiveQuestion.php');
                        $objective_qst = new ilCourseObjectiveQuestion($row->objective_id);
                        $objective_qst->cloneDependencies($objective_id,$a_copy_id);
                        
                        include_once './Modules/Course/classes/Objectives/class.ilLORandomTestQuestionPools.php';
                        include_once './Modules/Course/classes/Objectives/class.ilLOSettings.php';
                        $random_i = new ilLORandomTestQuestionPools(
                                $this->getCourse()->getId(),
                                $row->objective_id,
                                ilLOSettings::TYPE_TEST_INITIAL
                        );
                        $random_i->copy($a_copy_id, $new_course->getId(), $objective_id);
                        
                        $random_q = new ilLORandomTestQuestionPools(
                                $this->getCourse()->getId(),
                                $row->objective_id,
                                ilLOSettings::TYPE_TEST_QUALIFIED
                        );
                        $random_q->copy($a_copy_id, $new_course->getId(), $objective_id);
                        
                        include_once './Modules/Course/classes/Objectives/class.ilLOTestAssignments.php';
                        $assignments = ilLOTestAssignments::getInstance($this->course_obj->getId());
                        $assignment_it = $assignments->getAssignmentByObjective($row->objective_id, ilLOSettings::TYPE_TEST_INITIAL);
                        if($assignment_it)
                        {
                                $assignment_it->cloneSettings($a_copy_id, $new_course->getId(), $objective_id);
                        }

                        $assignment_qt = $assignments->getAssignmentByObjective($row->objective_id, ilLOSettings::TYPE_TEST_QUALIFIED);
                        if($assignment_qt)
                        {
                                $assignment_qt->cloneSettings($a_copy_id, $new_course->getId(), $objective_id);
                        }

                        ilLoggerFactory::getLogger('crs')->debug('Finished copying question dependencies');
                        
                        // Clone crs_objective_lm entries (assigned course materials)
                        include_once('Modules/Course/classes/class.ilCourseObjectiveMaterials.php');
                        $objective_material = new ilCourseObjectiveMaterials($row->objective_id);
                        $objective_material->cloneDependencies($objective_id,$a_copy_id);
                }
                ilLoggerFactory::getLogger('crs')->debug('Finished copying objectives');
        }
        
        // begin-patch lok
        public function setActive($a_stat)
        {
                $this->active = $a_stat;
        }
        
        public function isActive()
        {
                return $this->active;
        }
        
        public function setPasses($a_passes)
        {
                $this->passes = $a_passes;
        }
        
        public function getPasses()
        {
                return $this->passes;
        }
        
        public function arePassesLimited()
        {
                return $this->passes > 0;
        }
        // end-patch lok

        function setTitle($a_title)
        {
                $this->title = $a_title;
        }
        function getTitle()
        {
                return $this->title;
        }
        function setDescription($a_description)
        {
                $this->description = $a_description;
        }
        function getDescription()
        {
                return $this->description;
        }
        function setObjectiveId($a_objective_id)
        {
                $this->objective_id = $a_objective_id;
        }
        function getObjectiveId()
        {
                return $this->objective_id;
        }
        
        // begin-patch optes_lok_export
        public function setPosition($a_pos)
        {
                $this->position = $a_pos;
        }
        // end-patch optes_lok_export

        function add()
        {
                global $ilDB;
                
                // begin-patch lok
                $next_id = $ilDB->nextId('crs_objectives');
                $query = "INSERT INTO crs_objectives (crs_id,objective_id,active,title,description,position,created,passes) ".
                        "VALUES( ".
                        $ilDB->quote($this->course_obj->getId() ,'integer').", ".
                        $ilDB->quote($next_id,'integer').", ".
                        $ilDB->quote($this->isActive(),'integer').', '.
                        $ilDB->quote($this->getTitle() ,'text').", ".
                        $ilDB->quote($this->getDescription() ,'text').", ".
                        $ilDB->quote($this->__getLastPosition() + 1 ,'integer').", ".
                        $ilDB->quote(time() ,'integer').", ".
                        $ilDB->quote($this->getPasses(),'integer').' '.
                        ")";
                $res = $ilDB->manipulate($query);
                // end-patch lok
                
                // refresh learning progress status after adding new objective
                include_once("./Services/Tracking/classes/class.ilLPStatusWrapper.php");
                ilLPStatusWrapper::_refreshStatus($this->course_obj->getId());
                
                return $this->objective_id = $next_id;
        }

        function update()
        {
                global $ilDB;
                
                // begin-patch lok
                $query = "UPDATE crs_objectives ".
                        "SET title = ".$ilDB->quote($this->getTitle() ,'text').", ".
                        'active = '.$ilDB->quote($this->isActive(),'integer').', '.
                        "description = ".$ilDB->quote($this->getDescription() ,'text').", ".
                        'passes = '.$ilDB->quote($this->getPasses(),'integer').' '.
                        "WHERE objective_id = ".$ilDB->quote($this->getObjectiveId() ,'integer')." ".
                        "AND crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ";
                $res = $ilDB->manipulate($query);
                // end-patch lok
                
                return true;
        }
        
        public function writePosition($a_position)
        {
                global $ilDB;
                
                $query = "UPDATE crs_objectives ".
                        "SET position = ".$this->db->quote((string) $a_position ,'integer')." ".
                        "WHERE objective_id = ".$this->db->quote($this->getObjectiveId() ,'integer')." ";
                $res = $ilDB->manipulate($query);
        }
        
        public function validate()
        {
                return (bool) strlen($this->getTitle());
        }
        
        function delete()
        {
                global $ilDB;
                
                include_once './Modules/Course/classes/class.ilCourseObjectiveQuestion.php';

                $tmp_obj_qst = new ilCourseObjectiveQuestion($this->getObjectiveId());
                $tmp_obj_qst->deleteAll();

                include_once './Modules/Course/classes/class.ilCourseObjectiveMaterials.php';

                $tmp_obj_lm = new ilCourseObjectiveMaterials($this->getObjectiveId());
                $tmp_obj_lm->deleteAll();


                $query = "DELETE FROM crs_objectives ".
                        "WHERE crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ".
                        "AND objective_id = ".$ilDB->quote($this->getObjectiveId() ,'integer')." ";
                $res = $ilDB->manipulate($query);

                // refresh learning progress status after deleting objective
                include_once("./Services/Tracking/classes/class.ilLPStatusWrapper.php");
                ilLPStatusWrapper::_refreshStatus($this->course_obj->getId());

                return true;
        }

        function moveUp()
        {
                global $ilDB;
                
                if(!$this->getObjectiveId())
                {
                        return false;
                }
                // Stop if position is first
                if($this->__getPosition() == 1)
                {
                        return false;
                }

                $query = "UPDATE crs_objectives ".
                        "SET position = position + 1 ".
                        "WHERE position = ".$ilDB->quote($this->__getPosition() - 1 ,'integer')." ".
                        "AND crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ";
                $res = $ilDB->manipulate($query);
                
                $query = "UPDATE crs_objectives ".
                        "SET position = position - 1 ".
                        "WHERE objective_id = ".$ilDB->quote($this->getObjectiveId() ,'integer')." ".
                        "AND crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ";
                $res = $ilDB->manipulate($query);

                $this->__read();

                return true;
        }

        function moveDown()
        {
                global $ilDB;
                
                if(!$this->getObjectiveId())
                {
                        return false;
                }
                // Stop if position is last
                if($this->__getPosition() == $this->__getLastPosition())
                {
                        return false;
                }
                
                $query = "UPDATE crs_objectives ".
                        "SET position = position - 1 ".
                        "WHERE position = ".$ilDB->quote($this->__getPosition() + 1 ,'integer')." ".
                        "AND crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ";
                $res = $ilDB->manipulate($query);
                
                $query = "UPDATE crs_objectives ".
                        "SET position = position + 1 ".
                        "WHERE objective_id = ".$ilDB->quote($this->getObjectiveId() ,'integer')." ".
                        "AND crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ";
                $res = $ilDB->manipulate($query);

                $this->__read();

                return true;
        }

        // PRIVATE
        function __setPosition($a_position)
        {
                $this->position = $a_position;
        }
        function __getPosition()
        {
                return $this->position;
        }
        function __setCreated($a_created)
        {
                $this->created = $a_created;
        }
        function __getCreated()
        {
                return $this->created;
        }


        function __read()
        {
                global $ilDB;
                
                if($this->getObjectiveId())
                {
                        $query = "SELECT * FROM crs_objectives ".
                                "WHERE crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ".
                                "AND objective_id = ".$ilDB->quote($this->getObjectiveId() ,'integer')." ";


                        $res = $this->db->query($query);
                        while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                        {
                                // begin-patch lok
                                $this->setActive($row->active);
                                $this->setPasses($row->passes);
                                // end-patch lok
                                $this->setObjectiveId($row->objective_id);
                                $this->setTitle($row->title);
                                $this->setDescription($row->description);
                                $this->__setPosition($row->position);
                                $this->__setCreated($row->created);
                        }
                        return true;
                }
                return false;
        }

        function __getOrderColumn()
        {
                switch($this->course_obj->getOrderType())
                {
                        case ilContainer::SORT_MANUAL:
                                return 'ORDER BY position';

                        case ilContainer::SORT_TITLE:
                                return 'ORDER BY title';

                        case ilContainer::SORT_ACTIVATION:
                                return 'ORDER BY create';
                }
                return false;
        }

        function __updateTop()
        {
                global $ilDB;
                
                $query = "UPDATE crs_objectives ".
                        "SET position = position - 1 ".
                        "WHERE position > ".$ilDB->quote($this->__getPosition() ,'integer')." ".
                        "AND crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ";
                $res = $ilDB->manipulate($query);

                return true;
        }

        function __getLastPosition()
        {
                global $ilDB;
                
                $query = "SELECT MAX(position) pos FROM crs_objectives ".
                        "WHERE crs_id = ".$ilDB->quote($this->course_obj->getId() ,'integer')." ";

                $res = $this->db->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        return $row->pos;
                }
                return 0;
        }

        // STATIC
        // begin-patch lok
        static function _getObjectiveIds($course_id, $a_activated_only = false)
        {
                global $ilDB;

                if($a_activated_only)
                {
                        $query = "SELECT objective_id FROM crs_objectives ".
                                "WHERE crs_id = ".$ilDB->quote($course_id ,'integer')." ".
                                'AND active = '.$ilDB->quote(1,'integer').' '.
                                "ORDER BY position";
                }
                else
                {
                        $query = "SELECT objective_id FROM crs_objectives ".
                                "WHERE crs_id = ".$ilDB->quote($course_id ,'integer')." ".
                                "ORDER BY position";
                }

                $res = $ilDB->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        $ids[] = $row->objective_id;
                }

                return $ids ? $ids : array();
        }
        // end-patch lok

        static function _deleteAll($course_id)
        {
                global $ilDB;

                // begin-patch lok
                $ids = ilCourseObjective::_getObjectiveIds($course_id,false);
                // end-patch lok
                if(!count($ids))
                {
                        return true;
                }

                $in = $ilDB->in('objective_id',$ids,false,'integer');


                $query = "DELETE FROM crs_objective_lm WHERE  ".$in;
                $res = $ilDB->manipulate($query);

                $query = "DELETE FROM crs_objective_tst WHERE ".$in;
                $res = $ilDB->manipulate($query);
                
                $query = "DELETE FROM crs_objective_qst WHERE ".$in;
                $res = $ilDB->manipulate($query);
                
                $query = "DELETE FROM crs_objectives WHERE crs_id = ".$ilDB->quote($course_id ,'integer');
                $res = $ilDB->manipulate($query);

                // refresh learning progress status after deleting objectives
                include_once("./Services/Tracking/classes/class.ilLPStatusWrapper.php");
                ilLPStatusWrapper::_refreshStatus($course_id);

                return true;
        }
        
        // begin-patch optes_lok_export
        public function toXml(ilXmlWriter $writer)
        {
                $writer->xmlStartTag(
                        'Objective',
                        array(
                                'online' => (int) $this->isActive(),
                                'position' => (int) $this->position,
                                'id' => (int) $this->getObjectiveId()
                        )
                );
                $writer->xmlElement('Title',array(), $this->getTitle());
                $writer->xmlElement('Description',array(), $this->getDescription());
                
                // materials
                include_once './Modules/Course/classes/class.ilCourseObjectiveMaterials.php';
                $materials = new ilCourseObjectiveMaterials($this->getObjectiveId());
                $materials->toXml($writer);
                
                // test/questions
                include_once './Modules/Course/classes/class.ilCourseObjectiveQuestion.php';
                $test = new ilCourseObjectiveQuestion($this->getObjectiveId());
                $test->toXml($writer);
                
                include_once './Modules/Course/classes/Objectives/class.ilLOTestAssignments.php';
                $assignments = ilLOTestAssignments::getInstance($this->course_obj->getId());
                $assignments->toXml($writer, $this->getObjectiveId());
                
                include_once './Modules/Course/classes/Objectives/class.ilLORandomTestQuestionPools.php';
                ilLORandomTestQuestionPools::toXml($writer, $this->getObjectiveId());
                
                $writer->xmlEndTag('Objective');
        }
        // end-patch optes_lok_export
}
?>