class.ilLearningProgressBaseGUI.php

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<?php

/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

include_once 'Services/Tracking/classes/class.ilObjUserTracking.php';

class ilLearningProgressBaseGUI 
{
        var $tpl = null;
        var $ctrl = null;
        var $lng = null;        
        var $ref_id = 0;
        var $mode = 0;  
        
        protected $anonymized;
        
        const LP_CONTEXT_PERSONAL_DESKTOP = 1;
        const LP_CONTEXT_ADMINISTRATION = 2;
        const LP_CONTEXT_REPOSITORY = 3;
        const LP_CONTEXT_USER_FOLDER = 4;
        const LP_CONTEXT_ORG_UNIT = 5;
        
        const LP_ACTIVE_SETTINGS = 1;
        const LP_ACTIVE_OBJECTS = 2;
        const LP_ACTIVE_PROGRESS = 3;
        // const LP_ACTIVE_LM_STATISTICS = 4; obsolete
        const LP_ACTIVE_USERS = 5;
        const LP_ACTIVE_SUMMARY = 6;
        const LP_ACTIVE_OBJSTATACCESS = 7;
        const LP_ACTIVE_OBJSTATTYPES = 8;
        const LP_ACTIVE_OBJSTATDAILY = 9;
        const LP_ACTIVE_OBJSTATADMIN = 10;
        const LP_ACTIVE_MATRIX = 11;

        function ilLearningProgressBaseGUI($a_mode,$a_ref_id = 0,$a_usr_id = 0)
        {
                global $tpl,$ilCtrl,$lng,$ilObjDataCache,$ilTabs;

                $this->tpl =& $tpl;
                $this->ctrl =& $ilCtrl;
                $this->lng =& $lng;
                $this->lng->loadLanguageModule('trac');
                $this->tabs_gui =& $ilTabs;

                $this->mode = $a_mode;
                $this->ref_id = $a_ref_id;
                $this->obj_id = $ilObjDataCache->lookupObjId($this->ref_id);
                $this->obj_type = $ilObjDataCache->lookupType($this->obj_id);
                $this->usr_id = $a_usr_id;

                $this->anonymized = (bool)!ilObjUserTracking::_enabledUserRelatedData();
                if(!$this->anonymized && $this->obj_id)
                {
                        include_once "Services/Object/classes/class.ilObjectLP.php";
                        $olp = ilObjectLP::getInstance($this->obj_id);
                        $this->anonymized = $olp->isAnonymized();
                }
        }

        function isAnonymized()
        {
                return $this->anonymized;
        }

        function getMode()
        {
                return $this->mode;
        }

        function getRefId()
        {
                return $this->ref_id;
        }

        function getObjId()
        {
                return $this->obj_id;
        }

        function getUserId()
        {
                if($this->usr_id)
                {
                        return $this->usr_id;
                }
                if((int) $_GET['user_id'])
                {
                        return (int) $_GET['user_id'];
                }
                return 0;
        }
        
        // Protected
        function __getDefaultCommand()
        {
                if(strlen($cmd = $this->ctrl->getCmd()))
                {
                        return $cmd;
                }
                return 'show';
        }

        function __setSubTabs($a_active)
        {
                global $rbacsystem,$ilObjDataCache;


                
                switch($this->getMode())
                {
                        case self::LP_CONTEXT_PERSONAL_DESKTOP:

                                include_once("Services/Tracking/classes/class.ilObjUserTracking.php");
                                if(ilObjUserTracking::_hasLearningProgressLearner() && 
                                        ilObjUserTracking::_enabledUserRelatedData())
                                {
                                        $this->tabs_gui->addTarget('trac_progress',
                                                                                                        $this->ctrl->getLinkTargetByClass('illplistofprogressgui',''),
                                                                                                        "","","",$a_active == self::LP_ACTIVE_PROGRESS);
                                }

                                if(ilObjUserTracking::_hasLearningProgressOtherUsers())
                                {
                                        $this->tabs_gui->addTarget('trac_objects',
                                                                                                         $this->ctrl->getLinkTargetByClass("illplistofobjectsgui",''),
                                                                                                         "","","",$a_active == self::LP_ACTIVE_OBJECTS);
                                }
                                break;


                        case self::LP_CONTEXT_REPOSITORY:
                                // #12771 - do not show status if learning progress is deactivated                                      
                                include_once './Services/Object/classes/class.ilObjectLP.php';
                                $olp = ilObjectLP::getInstance($this->obj_id);                  
                                if($olp->isActive())
                                {
                                        include_once './Services/Tracking/classes/class.ilLearningProgressAccess.php';
                                        $has_read = ilLearningProgressAccess::checkPermission('read_learning_progress', $this->getRefId());
                                                                
                                        if($this->isAnonymized() || !$has_read)
                                        {
                                                $this->ctrl->setParameterByClass('illplistofprogressgui','user_id',$this->getUserId());
                                                $this->tabs_gui->addSubTabTarget('trac_progress',
                                                                                                                 $this->ctrl->getLinkTargetByClass('illplistofprogressgui',''),
                                                                                                                 "","","",$a_active == self::LP_ACTIVE_PROGRESS);
                                        }
                                        else
                                        {
                                                // Check if it is a course
                                                $sub_tab = ($ilObjDataCache->lookupType($ilObjDataCache->lookupObjId($this->getRefId())) == 'crs') ?
                                                        'trac_crs_objects' :
                                                        'trac_objects';

                                                $this->tabs_gui->addSubTabTarget($sub_tab,
                                                                                                                 $this->ctrl->getLinkTargetByClass("illplistofobjectsgui",''),
                                                                                                                 "","","",$a_active == self::LP_ACTIVE_OBJECTS);
                                        }

                                        if($has_read)
                                        {
                                                if(!$this->isAnonymized() && 
                                                        !($olp instanceof ilPluginLP) &&
                                                        ilObjectLP::supportsMatrixView($this->obj_type))
                                                {
                                                        $this->tabs_gui->addSubTabTarget("trac_matrix",
                                                                                                                        $this->ctrl->getLinkTargetByClass("illplistofobjectsgui", 'showUserObjectMatrix'),
                                                                                                                        "", "", "", $a_active == self::LP_ACTIVE_MATRIX);                                                       
                                                }

                                                $this->tabs_gui->addSubTabTarget("trac_summary",
                                                                                                                $this->ctrl->getLinkTargetByClass("illplistofobjectsgui", 'showObjectSummary'),
                                                                                                                "", "", "", $a_active == self::LP_ACTIVE_SUMMARY);
                                        }
                                }                               
                                include_once './Services/Tracking/classes/class.ilLearningProgressAccess.php';
                                if(!($olp instanceof ilPluginLP) &&
                                        ilLearningProgressAccess::checkPermission('edit_learning_progress', $this->getRefId()))
                                {
                                        $this->tabs_gui->addSubTabTarget('trac_settings',
                                                                                                         $this->ctrl->getLinkTargetByClass('illplistofsettingsgui',''),
                                                                                                         "","","",$a_active == self::LP_ACTIVE_SETTINGS);
                                }
                                break;

                        case self::LP_CONTEXT_ADMINISTRATION:
                                /*
                                $this->tabs_gui->addSubTabTarget('trac_progress',
                                                                         $this->ctrl->getLinkTargetByClass('illplistofprogressgui',''),
                                                                         "","","",$a_active == self::LP_ACTIVE_PROGRESS);
                                */
                                $this->tabs_gui->addSubTabTarget('trac_objects',
                                                                         $this->ctrl->getLinkTargetByClass("illplistofobjectsgui",''),
                                                                         "","","",$a_active == self::LP_ACTIVE_OBJECTS);
                                break;

                        case self::LP_CONTEXT_USER_FOLDER:
                        case self::LP_CONTEXT_ORG_UNIT:
                                // No tabs default class is lpprogressgui
                                break;

                        default:
                                die ('No valid mode given');
                                break;
                }

                return true;
        }

        function __buildFooter()
        {
                switch($this->getMode())
                {
                        case self::LP_CONTEXT_PERSONAL_DESKTOP:

                                $this->tpl->show(true);
                }
        }

        function __buildHeader()
        {
                if($this->getMode() == self::LP_CONTEXT_PERSONAL_DESKTOP)
                {
                        $this->tpl->setTitle($this->lng->txt("learning_progress"));
                        
                        // set locator
/*
                        $this->tpl->setVariable("TXT_LOCATOR", $this->lng->txt("locator"));
                        $this->tpl->touchBlock("locator_separator");
                        $this->tpl->touchBlock("locator_item");
                        //$this->tpl->setCurrentBlock("locator_item");
                        //$this->tpl->setVariable("ITEM", $this->lng->txt("personal_desktop"));
                        //$this->tpl->setVariable("LINK_ITEM",
                        //                                              $this->ctrl->getLinkTargetByClass("ilpersonaldesktopgui"));
                        //$this->tpl->parseCurrentBlock();
                        
                        $this->tpl->setCurrentBlock("locator_item");
                        $this->tpl->setVariable("ITEM", $this->lng->txt("learning_progress"));
                        $this->tpl->setVariable("LINK_ITEM",
                                                                        $this->ctrl->getLinkTargetByClass('illearningprogressgui'));
                        $this->tpl->parseCurrentBlock();
*/
                
                        // display infopanel if something happened
                        ilUtil::infoPanel();
                }

        }

        function __insertPath(&$a_tpl,$a_ref_id)
        {
                global $tree;

                $path_arr = $tree->getPathFull($a_ref_id);
                $counter = 0;
                foreach($tree->getPathFull($a_ref_id) as $data)
                {
                        if($counter++)
                        {
                                $path .= " -> ";
                        }
                        $path .= $data['title'];
                }
                $a_tpl->setCurrentBlock("path_item");
                $a_tpl->setVariable("PATH_ITEM",$path);
                $a_tpl->parseCurrentBlock();

                $a_tpl->setCurrentBlock("path");
                $a_tpl->parseCurrentBlock();

                return $path;
        }

        function __showImageByStatus(&$tpl,$a_status,$tpl_prefix = "")
        {
                return ilLearningProgressBaseGUI::_showImageByStatus($tpl,$a_status,$tpl_prefix);
        }
        
        // we need this public in table classes
        public static function _showImageByStatus(&$tpl,$a_status,$tpl_prefix = "")
        {
                global $lng;
                
                $tpl->setVariable($tpl_prefix."STATUS_IMG",
                        ilLearningProgressBaseGUI::_getImagePathForStatus($a_status));
                $tpl->setVariable($tpl_prefix."STATUS_ALT",$lng->txt($a_status));
                
                return true;
        }
        
        function _getImagePathForStatus($a_status)
        {
                include_once("./Services/Tracking/classes/class.ilLPStatus.php");

                // constants are either number or string, so make comparison string-based
                switch((string)$a_status)
                {
                        case ilLPStatus::LP_STATUS_IN_PROGRESS_NUM:
                        case ilLPStatus::LP_STATUS_IN_PROGRESS:
                        case ilLPStatus::LP_STATUS_REGISTERED:
                                return ilUtil::getImagePath('scorm/incomplete.svg');
                                break;

                        case ilLPStatus::LP_STATUS_COMPLETED_NUM:
                        case ilLPStatus::LP_STATUS_COMPLETED:
                        case ilLPStatus::LP_STATUS_PARTICIPATED:
                                return ilUtil::getImagePath('scorm/complete.svg');
                                break;
                        
                        case ilLPStatus::LP_STATUS_NOT_ATTEMPTED:
                        case ilLPStatus::LP_STATUS_NOT_PARTICIPATED:
                        case ilLPStatus::LP_STATUS_NOT_REGISTERED:
                                return ilUtil::getImagePath('scorm/not_attempted.svg');
                                break;

                        case ilLPStatus::LP_STATUS_FAILED_NUM:
                        case ilLPStatus::LP_STATUS_FAILED:
                                return ilUtil::getImagePath('scorm/failed.svg');
                                break;
                        
                        default:
                                return ilUtil::getImagePath('scorm/not_attempted.svg');
                                break;
                }               
        }

        function _getStatusText($a_status, $a_lng = null)
        {
                global $lng;
                
                if(!$a_lng)
                {
                        $a_lng = $lng;
                }
                
                include_once("./Services/Tracking/classes/class.ilLPStatus.php");
//echo "#".$a_status."#";
                switch($a_status)
                {
                        case ilLPStatus::LP_STATUS_IN_PROGRESS_NUM:
                                return $a_lng->txt(ilLPStatus::LP_STATUS_IN_PROGRESS);
                                
                        case ilLPStatus::LP_STATUS_COMPLETED_NUM:
                                return $a_lng->txt(ilLPStatus::LP_STATUS_COMPLETED);

                        case ilLPStatus::LP_STATUS_FAILED_NUM:
                                return $a_lng->txt(ilLPStatus::LP_STATUS_FAILED);

                        default:
                                if ($a_status === ilLPStatus::LP_STATUS_NOT_ATTEMPTED_NUM)
                                {
                                        return $a_lng->txt(ilLPStatus::LP_STATUS_NOT_ATTEMPTED);
                                }
                                return $a_lng->txt($a_status);
                }               
        }


        // Protected Table gui methods
        function &__initTableGUI()
        {
                include_once "./Services/Table/classes/class.ilTableGUI.php";

                return new ilTableGUI(0,false);
        }


        function __showObjectDetails(&$info,$item_id = 0,$add_section = true)
        {
                global $ilObjDataCache;

                $details_id = $item_id ? $item_id : $this->details_id;
                
                include_once 'Services/Object/classes/class.ilObjectLP.php';
                $olp = ilObjectLP::getInstance($details_id);                                                                                                    
                $mode = $olp->getCurrentMode();

                include_once './Services/MetaData/classes/class.ilMDEducational.php';
                if($mode == ilLPObjSettings::LP_MODE_VISITS ||
                   ilMDEducational::_getTypicalLearningTimeSeconds($details_id))
                {
                        // Section object details
                        if($add_section)
                        {
                                $info->addSection($this->lng->txt('details'));
                        }

                        if($mode == ilLPObjSettings::LP_MODE_VISITS)
                        {
                                $info->addProperty($this->lng->txt('trac_required_visits'), ilLPObjSettings::_lookupVisits($details_id));
                        }

                        if($seconds = ilMDEducational::_getTypicalLearningTimeSeconds($details_id))
                        {
                                $info->addProperty($this->lng->txt('meta_typical_learning_time'), ilFormat::_secondsToString($seconds));
                        }

                        return true;
                }
                return false;
        }

        function __appendUserInfo(&$info, $a_user)
        {
                global $ilUser;
                
                // #13525 - irrelevant personal data is not to be presented
                return;

                if(!is_object($a_user))
                {
                        $a_user = ilObjectFactory::getInstanceByObjId($a_user);
                }

                if($a_user->getId() != $ilUser->getId())
                {
                        $info->addSection($this->lng->txt("trac_user_data"));
                        // $info->addProperty($this->lng->txt('username'),$a_user->getLogin());
                        // $info->addProperty($this->lng->txt('name'),$a_user->getFullname());
                        $info->addProperty($this->lng->txt('last_login'),
                                ilDatePresentation::formatDate(new ilDateTime($a_user->getLastLogin(),IL_CAL_DATETIME)));
                        $info->addProperty($this->lng->txt('trac_total_online'),
                                                           ilFormat::_secondsToString(ilOnlineTracking::getOnlineTime($a_user->getId())));
                   return true;
                }
        }

        function __appendLPDetails(&$info,$item_id,$user_id)
        {
                global $ilObjDataCache;

                $type = $ilObjDataCache->lookupType($item_id);
                
                // Section learning_progress
                // $info->addSection($this->lng->txt('trac_learning_progress'));
                // see ilLPTableBaseGUI::parseTitle();
                $info->addSection($this->lng->txt("trac_progress").": ".ilObject::_lookupTitle($item_id));
                
                $olp = ilObjectLP::getInstance($item_id);
                $info->addProperty($this->lng->txt('trac_mode'),
                        $olp->getModeText($olp->getCurrentMode()));
                
                switch($type)
                {
                        case 'lm':
                        case 'htlm':
                                include_once 'Services/Tracking/classes/class.ilLearningProgress.php';
                                $progress = ilLearningProgress::_getProgress($user_id,$item_id);
                        
                                if($progress['access_time'])
                                {
                                        $info->addProperty($this->lng->txt('last_access'),
                                                ilDatePresentation::formatDate(new ilDateTime($progress['access_time'],IL_CAL_UNIX)));
                                }
                                else
                                {
                                        $info->addProperty($this->lng->txt('last_access'),$this->lng->txt('trac_not_accessed'));
                                }
                                $info->addProperty($this->lng->txt('trac_visits'),(int) $progress['visits']);
                                if(ilObjectLP::supportsSpentSeconds($type))
                                {
                                        $info->addProperty($this->lng->txt('trac_spent_time'),ilFormat::_secondsToString($progress['spent_seconds']));
                                }
                                // fallthrough
                                
                        case 'exc':
                        case 'tst':
                        case 'file':
                        case 'mcst':
                        case 'svy':
                        case 'crs':
                        case 'sahs':
                        case 'grp':
                                // display status as image
                                include_once("./Services/Tracking/classes/class.ilLearningProgressBaseGUI.php");
                                $status = $this->__readStatus($item_id,$user_id);
                                $status_path = ilLearningProgressBaseGUI::_getImagePathForStatus($status);
                                $status_text = ilLearningProgressBaseGUI::_getStatusText($status);
                                $info->addProperty($this->lng->txt('trac_status'), 
                                        ilUtil::img($status_path, $status_text)." ".$status_text);
                                
                                // #15334 - see ilLPTableBaseGUI::isPercentageAvailable()
                                $mode = $olp->getCurrentMode();
                                if(in_array($mode, array(ilLPObjSettings::LP_MODE_TLT, 
                                        ilLPObjSettings::LP_MODE_VISITS, 
                                        // ilLPObjSettings::LP_MODE_OBJECTIVES, 
                                        ilLPObjSettings::LP_MODE_SCORM,
                                        ilLPObjSettings::LP_MODE_TEST_PASSED)))
                                {
                                        include_once 'Services/Tracking/classes/class.ilLPStatus.php';
                                        $perc = ilLPStatus::_lookupPercentage($item_id, $user_id);
                                        $info->addProperty($this->lng->txt('trac_percentage'), (int)$perc."%");
                                }                               
                                break;

                }
                
                include_once 'Services/Tracking/classes/class.ilLPMarks.php';

                if(ilObjectLP::supportsMark($type))
                {                       
                        if(strlen($mark = ilLPMarks::_lookupMark($user_id,$item_id)))
                        {
                                $info->addProperty($this->lng->txt('trac_mark'),$mark);
                        }
                }
                
                if(strlen($comment = ilLPMarks::_lookupComment($user_id,$item_id)))
                {
                        $info->addProperty($this->lng->txt('trac_comment'),$comment);
                }
        }

        function __readStatus($a_obj_id,$user_id)
        {
                include_once 'Services/Tracking/classes/class.ilLPStatus.php';
                $status = ilLPStatus::_lookupStatus($a_obj_id, $user_id);

                include_once("./Services/Tracking/classes/class.ilLPStatus.php");
                switch($status)
                {
                        case ilLPStatus::LP_STATUS_IN_PROGRESS_NUM:
                                return ilLPStatus::LP_STATUS_IN_PROGRESS;

                        case ilLPStatus::LP_STATUS_COMPLETED_NUM:
                                return ilLPStatus::LP_STATUS_COMPLETED;

                        case ilLPStatus::LP_STATUS_FAILED_NUM:
                                return ilLPStatus::LP_STATUS_FAILED;

                        case ilLPStatus::LP_STATUS_NOT_ATTEMPTED_NUM:
                                return ilLPStatus::LP_STATUS_NOT_ATTEMPTED;

                        default:
                                return $status;
                }
        }

        function __sort($a_ids,$a_table,$a_field,$a_id_name)
        {
                global $ilDB;

                if(!$a_ids)
                {
                        return array();
                }

                // comment by mjansen: Requesting database in gui classes?

                // use database to sort user array
                $where = "WHERE ".$ilDB->in($a_id_name, $a_ids, false, 'integer')." ";

                $query = "SELECT ".$a_id_name." FROM ".$a_table." ".
                        $where.
                        "ORDER BY ".$a_field;

                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $ids[] = $row->$a_id_name;
                }
                return $ids ? $ids : array();
        }

        function __getPercent($max,$reached)
        {
                if(!$max)
                {
                        return "0%";
                }

                return sprintf("%d%%",$reached / $max * 100);
        }

        function __readItemStatusInfo($a_items)
        {
                global $ilObjDataCache;

                include_once 'Services/Object/classes/class.ilObjectLP.php';
                
                foreach($a_items as $item_id)
                {                       
                        $olp = ilObjectLP::getInstance($item_id);                                                                                                       
                        
                        $this->obj_data[$item_id]['type'] = $ilObjDataCache->lookupType($item_id);
                        $this->obj_data[$item_id]['mode'] = $olp->getCurrentMode();                                             
                        if($this->obj_data[$item_id]['mode'] == ilLPObjSettings::LP_MODE_TLT)
                        {
                                include_once './Services/MetaData/classes/class.ilMDEducational.php';
                                $this->obj_data[$item_id]['tlt'] = ilMDEducational::_getTypicalLearningTimeSeconds($item_id);
                        }
                        if($this->obj_data[$item_id]['mode'] == ilLPObjSettings::LP_MODE_VISITS)
                        {                               
                                $this->obj_data[$item_id]['visits'] = ilLPObjSettings::_lookupVisits($item_id);
                        }
                        if($this->obj_data[$item_id]['mode'] == ilLPObjSettings::LP_MODE_SCORM)
                        {
                                $collection = $olp->getCollectionInstance();
                                if($collection)
                                {
                                        $this->obj_data[$item_id]['scos'] = count($collection->getItems());
                                }
                        }
                }
        }

        function __getLegendHTML()
        {
                global $lng;
                
                $tpl = new ilTemplate("tpl.lp_legend.html", true, true, "Services/Tracking");
                $tpl->setVariable("IMG_NOT_ATTEMPTED",
                        ilUtil::getImagePath("scorm/not_attempted.svg"));
                $tpl->setVariable("IMG_IN_PROGRESS",
                        ilUtil::getImagePath("scorm/incomplete.svg"));
                $tpl->setVariable("IMG_COMPLETED",
                        ilUtil::getImagePath("scorm/completed.svg"));
                $tpl->setVariable("IMG_FAILED",
                        ilUtil::getImagePath("scorm/failed.svg"));
                $tpl->setVariable("TXT_NOT_ATTEMPTED",
                        $lng->txt("trac_not_attempted"));
                $tpl->setVariable("TXT_IN_PROGRESS",
                        $lng->txt("trac_in_progress"));
                $tpl->setVariable("TXT_COMPLETED",
                        $lng->txt("trac_completed"));
                $tpl->setVariable("TXT_FAILED",
                        $lng->txt("trac_failed"));
                
                include_once "Services/UIComponent/Panel/classes/class.ilPanelGUI.php";
                $panel = ilPanelGUI::getInstance();
                $panel->setPanelStyle(ilPanelGUI::PANEL_STYLE_SECONDARY);
                $panel->setBody($tpl->get());
                
                return $panel->getHTML();
        }
        
        protected function initEditUserForm($a_user_id, $a_obj_id, $a_cancel = null)
        {
                global $lng, $ilCtrl;
                
                include_once 'Services/Object/classes/class.ilObjectLP.php';
                $olp = ilObjectLP::getInstance($a_obj_id);              
                $lp_mode = $olp->getCurrentMode();
                
                include_once './Services/Form/classes/class.ilPropertyFormGUI.php';
                $form = new ilPropertyFormGUI();                
                
                $form->setFormAction($ilCtrl->getFormAction($this, "updateUser"));
                
                $form->setTitle($lng->txt("edit").": ".ilObject::_lookupTitle($a_obj_id));
                $form->setDescription($lng->txt('trac_mode').": ".$olp->getModeText($lp_mode));
                
                include_once "Services/User/classes/class.ilUserUtil.php";
                $user = new ilNonEditableValueGUI($lng->txt("user"), null, true);
                $user->setValue(ilUserUtil::getNamePresentation($a_user_id, true));
                $form->addItem($user);
                                
                include_once 'Services/Tracking/classes/class.ilLPMarks.php';
                $marks = new ilLPMarks($a_obj_id, $a_user_id);
                
                if(ilObjectLP::supportsMark(ilObject::_lookupType($a_obj_id)))
                {
                        $mark = new ilTextInputGUI($lng->txt("trac_mark"), "mark");
                        $mark->setValue($marks->getMark());
                        $mark->setMaxLength(32);
                        $form->addItem($mark);
                }
                
                $comm = new ilTextInputGUI($lng->txt("trac_comment"), "comment");
                $comm->setValue($marks->getComment());
                $form->addItem($comm);
                        
                if($lp_mode == ilLPObjSettings::LP_MODE_MANUAL || 
                        $lp_mode == ilLPObjSettings::LP_MODE_MANUAL_BY_TUTOR)
                {
                        include_once("./Services/Tracking/classes/class.ilLPStatus.php");
                        $completed = ilLPStatus::_lookupStatus($a_obj_id, $a_user_id);  
                        
                        $status = new ilCheckboxInputGUI($lng->txt('trac_completed'), "completed");
                        $status->setChecked(($completed == ilLPStatus::LP_STATUS_COMPLETED_NUM));
                        $form->addItem($status);
                }
                        
                $form->addCommandButton("updateUser", $lng->txt('save'));
                
                if($a_cancel)
                {
                        $form->addCommandButton($a_cancel, $lng->txt('cancel'));
                }
                
                return $form;
        }

        function __showEditUser($a_user_id, $a_ref_id, $a_cancel, $a_sub_id = false)
        {                               
                global $ilCtrl;
                
                if(!$a_sub_id)
        {
                        $obj_id = ilObject::_lookupObjId($a_ref_id);
                }
                else
                {
                        $ilCtrl->setParameter($this,'userdetails_id',$a_sub_id);
                        $obj_id = ilObject::_lookupObjId($a_sub_id);
                }               
                                
                $ilCtrl->setParameter($this, 'user_id', $a_user_id);
                $ilCtrl->setParameter($this, 'details_id', $a_ref_id);
                
                $form = $this->initEditUserForm($a_user_id, $obj_id, $a_cancel);
                
                return $form->getHTML();
        }

        function __updateUser($user_id, $obj_id)
        {               
                $form = $this->initEditUserForm($user_id, $obj_id);
                if($form->checkInput())
                {
                        include_once 'Services/Tracking/classes/class.ilLPMarks.php';

                        $marks = new ilLPMarks($obj_id, $user_id);
                        $marks->setMark($form->getInput("mark"));
                        $marks->setComment($form->getInput("comment"));
                        
                        $do_lp = false;
                        
                        // status/completed is optional
                        $status = $form->getItemByPostVar("completed");
                        if(is_object($status))
                        {                       
                                if($marks->getCompleted() != $form->getInput("completed"))
                                {
                                        $marks->setCompleted($form->getInput("completed"));
                                        $do_lp = true;
                                }
                        }

                        $marks->update();

                        // #11600
                        if($do_lp)
                        {
                                include_once("./Services/Tracking/classes/class.ilLPStatusWrapper.php");
                                ilLPStatusWrapper::_updateStatus($obj_id, $user_id);                    
                        }
                }
        }
        
        static function isObjectOffline($a_obj_id, $a_type = null)
        {
                global $objDefinition, $ilObjDataCache;

                if(!$a_type)
                {
                        $a_type = $ilObjDataCache->lookupType($a_obj_id);
                }
                
                if($objDefinition->isPluginTypeName($a_type))
                {
                        return false;
                }
                
                $class = "ilObj".$objDefinition->getClassName($a_type)."Access";
                include_once $objDefinition->getLocation($a_type)."/class.".$class.".php";
                return call_user_func(array($class,'_isOffline'), $a_obj_id);

                // PHP 5.3 only ?
                //return $class::_isOffline($obj_id);
        }
}

?>