class.ilObjQuestionPoolGUI.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once './Services/Object/classes/class.ilObjectGUI.php';
require_once './Modules/TestQuestionPool/classes/class.assQuestionGUI.php';
require_once './Modules/TestQuestionPool/classes/class.ilObjQuestionPool.php';
require_once './Modules/TestQuestionPool/exceptions/class.ilTestQuestionPoolException.php';
require_once './Modules/Test/classes/inc.AssessmentConstants.php';
require_once './Modules/Test/classes/class.ilObjAssessmentFolder.php';
require_once './Modules/Test/classes/class.ilObjTest.php';

class ilObjQuestionPoolGUI extends ilObjectGUI
{
        public $object;
        
        function ilObjQuestionPoolGUI()
        {
                global $lng, $ilCtrl, $rbacsystem;
                $lng->loadLanguageModule("assessment");
                $this->type = "qpl";
                $this->ctrl =& $ilCtrl;
                
                $this->ctrl->saveParameter($this, array(
                        "ref_id", "test_ref_id", "calling_test", "test_express_mode", "q_id", 'tax_node', 'calling_consumer', 'consumer_context'
                ));
                $this->ctrl->saveParameter($this, "calling_consumer");
                $this->ctrl->saveParameterByClass('ilAssQuestionPageGUI', 'calling_consumer');
                $this->ctrl->saveParameterByClass('ilAssQuestionPageGUI', 'consumer_context');
                $this->ctrl->saveParameterByClass('ilobjquestionpoolgui', 'calling_consumer');
                $this->ctrl->saveParameterByClass('ilobjquestionpoolgui', 'consumer_context');

                $this->ilObjectGUI("",$_GET["ref_id"], true, false);
        }

        function executeCommand()
        {
                global $ilUser, $ilLocator, $ilAccess, $ilNavigationHistory, $tpl, $ilCtrl, $ilErr, $ilTabs, $lng, $ilDB, $ilPluginAdmin;
                
                if ((!$ilAccess->checkAccess("read", "", $_GET["ref_id"])) && (!$ilAccess->checkAccess("visible", "", $_GET["ref_id"])))
                {
                        global $ilias;
                        $ilias->raiseError($this->lng->txt("permission_denied"), $ilias->error_obj->MESSAGE);
                }
                
                // add entry to navigation history
                if (!$this->getCreationMode() &&
                        $ilAccess->checkAccess("read", "", $_GET["ref_id"]))
                {
                        if('qpl' == $this->object->getType())
                        {
                                $ilNavigationHistory->addItem($_GET["ref_id"],
                                        "ilias.php?baseClass=ilObjQuestionPoolGUI&cmd=questions&ref_id=".$_GET["ref_id"], "qpl");
                        }
                }
                
                $cmd = $this->ctrl->getCmd("questions");
                $next_class = $this->ctrl->getNextClass($this);
                
                if( in_array($next_class, array('', 'ilobjquestionpoolgui')) && $cmd == 'questions' )
                {
                        $_GET['q_id'] = '';
                }
                                
                $this->prepareOutput();
                
                $this->ctrl->setReturn($this, "questions");
                
                $this->tpl->addCss(ilUtil::getStyleSheetLocation("output", "test_print.css", "Modules/Test"), "print");
                $this->tpl->addCss(ilUtil::getStyleSheetLocation("output", "ta.css", "Modules/Test"), "screen");
                
                if ($_GET["q_id"] < 1)
                {
                        $q_type = ($_POST["sel_question_types"] != "")
                                ? $_POST["sel_question_types"]
                                : $_GET["sel_question_types"];
                }
                if ($cmd != "createQuestion" && $cmd != "createQuestionForTest"
                        && $next_class != "ilassquestionpagegui")
                {
                        if (($_GET["test_ref_id"] != "") or ($_GET["calling_test"]))
                        {
                                $ref_id = $_GET["test_ref_id"];
                                if (!$ref_id)
                                {
                                        $ref_id = $_GET["calling_test"];
                                }
                        }
                }
                switch($next_class)
                {
                        case "ilcommonactiondispatchergui":
                                include_once("Services/Object/classes/class.ilCommonActionDispatcherGUI.php");
                                $gui = ilCommonActionDispatcherGUI::getInstanceFromAjaxCall();
                                $this->ctrl->forwardCommand($gui);
                                break;

                        case 'ilmdeditorgui':
                                if(!$ilAccess->checkAccess('write','',$this->object->getRefId()))
                                {
                                        $ilErr->raiseError($this->lng->txt('permission_denied'),$ilErr->WARNING);
                                }
                                
                                include_once 'Services/MetaData/classes/class.ilMDEditorGUI.php';

                                $md_gui = new ilMDEditorGUI($this->object->getId(), 0, $this->object->getType());
                                $md_gui->addObserver($this->object,'MDUpdateListener','General');
                                $this->ctrl->forwardCommand($md_gui);
                                break;
                        
                        case 'ilassquestionpreviewgui':

                                $this->ctrl->saveParameter($this, "q_id");

                                require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionPreviewGUI.php';
                                $gui = new ilAssQuestionPreviewGUI($this->ctrl, $this->tabs_gui, $this->tpl, $this->lng, $ilDB);
                                
                                $gui->initQuestion((int)$_GET['q_id'], $this->object->getId());
                                $gui->initPreviewSettings($this->object->getRefId());
                                $gui->initPreviewSession($ilUser->getId(), (int)$_GET['q_id']);
                                $gui->initHintTracking();
                                $gui->initStyleSheets();

                                global $ilHelp;
                                $ilHelp->setScreenIdComponent("qpl");

                                $this->ctrl->forwardCommand($gui);
                                break;
                                
                        case "ilassquestionpagegui":
                                include_once("./Services/Style/classes/class.ilObjStyleSheet.php");
                                $this->tpl->setCurrentBlock("ContentStyle");
                                $this->tpl->setVariable("LOCATION_CONTENT_STYLESHEET", ilObjStyleSheet::getContentStylePath(0));
                                $this->tpl->parseCurrentBlock();
                
                                // syntax style
                                $this->tpl->setCurrentBlock("SyntaxStyle");
                                $this->tpl->setVariable("LOCATION_SYNTAX_STYLESHEET", ilObjStyleSheet::getSyntaxStylePath());
                                $this->tpl->parseCurrentBlock();
                                
                                include_once "./Modules/TestQuestionPool/classes/class.assQuestionGUI.php";
                                $q_gui = assQuestionGUI::_getQuestionGUI("", $_GET["q_id"]);
                                $q_gui->setQuestionTabs();
                                $q_gui->outAdditionalOutput();
                                $q_gui->object->setObjId($this->object->getId());

                                $q_gui->setTargetGuiClass(null);
                                $q_gui->setQuestionActionCmd(null);
                                
                                $question = $q_gui->object;
                                $this->ctrl->saveParameter($this, "q_id");
                                include_once("./Modules/TestQuestionPool/classes/class.ilAssQuestionPageGUI.php");
                                $this->lng->loadLanguageModule("content");
                                $this->ctrl->setReturnByClass("ilAssQuestionPageGUI", "view");
                                $this->ctrl->setReturn($this, "questions");
                                $page_gui = new ilAssQuestionPageGUI($_GET["q_id"]);
                                $page_gui->setEditPreview(true);
                                $page_gui->setEnabledTabs(false);
                                if (strlen($this->ctrl->getCmd()) == 0 && !isset($_POST["editImagemapForward_x"])) // workaround for page edit imagemaps, keep in mind
                                {
                                        $this->ctrl->setCmdClass(get_class($page_gui));
                                        $this->ctrl->setCmd("preview");
                                }
                                $page_gui->setQuestionHTML(array($q_gui->object->getId() => $q_gui->getPreview(TRUE)));
                                $page_gui->setTemplateTargetVar("ADM_CONTENT");
                                $page_gui->setOutputMode("edit");
                                $page_gui->setHeader($question->getTitle());
                                $page_gui->setPresentationTitle($question->getTitle());
                                $ret = $this->ctrl->forwardCommand($page_gui);
                                $tpl->setContent($ret);
                                break;
                                
                        case 'ilpermissiongui':
                                include_once("Services/AccessControl/classes/class.ilPermissionGUI.php");
                                $perm_gui = new ilPermissionGUI($this);
                                $ret = $this->ctrl->forwardCommand($perm_gui);
                                break;
                                
                        case 'ilobjectcopygui':
                                include_once './Services/Object/classes/class.ilObjectCopyGUI.php';
                                $cp = new ilObjectCopyGUI($this);
                                $cp->setType('qpl');
                                $this->ctrl->forwardCommand($cp);
                                break;
                                
                        case "ilquestionpoolexportgui":
                                require_once 'Modules/TestQuestionPool/classes/class.ilQuestionPoolExportGUI.php';
                                $exp_gui = new ilQuestionPoolExportGUI($this);
                                $exp_gui->addFormat('zip', $this->lng->txt('qpl_export_xml'), $this, 'createExportQTI');
                                $exp_gui->addFormat('xls', $this->lng->txt('qpl_export_excel'), $this, 'createExportExcel');
                                $ret = $this->ctrl->forwardCommand($exp_gui);
                                break;
                        
                        case "ilinfoscreengui":
                                $this->infoScreenForward();
                                break;
                        
                        case 'ilassquestionhintsgui':
        
                                // set return target
                                $this->ctrl->setReturn($this, "questions");

                                // set context tabs
                                require_once 'Modules/TestQuestionPool/classes/class.assQuestionGUI.php';
                                $questionGUI = assQuestionGUI::_getQuestionGUI($q_type, $_GET['q_id']);
                                $questionGUI->object->setObjId($this->object->getId());
                                $questionGUI->setQuestionTabs();
                                global $ilHelp;
                                $ilHelp->setScreenIdComponent("qpl");

                                // forward to ilAssQuestionHintsGUI
                                require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionHintsGUI.php';
                                $gui = new ilAssQuestionHintsGUI($questionGUI);
                                $ilCtrl->forwardCommand($gui);
                                
                                break;
                        
                        case 'illocalunitconfigurationgui':
                                if(!$ilAccess->checkAccess('write','',$this->object->getRefId()))
                                {
                                        $ilErr->raiseError($this->lng->txt('permission_denied'),$ilErr->WARNING);
                                }

                                require_once 'Modules/TestQuestionPool/classes/class.assQuestionGUI.php';
                                $questionGUI = assQuestionGUI::_getQuestionGUI($q_type, $_GET['q_id']);
                                $questionGUI->object->setObjId($this->object->getId());
                                $questionGUI->setQuestionTabs();

                                $this->ctrl->setReturn($this, 'questions');

                                require_once 'Modules/TestQuestionPool/classes/class.ilLocalUnitConfigurationGUI.php';
                                require_once 'Modules/TestQuestionPool/classes/class.ilUnitConfigurationRepository.php';
                                $gui = new ilLocalUnitConfigurationGUI(
                                        new ilUnitConfigurationRepository((int)$_GET['q_id'])
                                );
                                $ilCtrl->forwardCommand($gui);
                                break;
                        
                        case 'ilassquestionfeedbackeditinggui':
        
                                // set return target
                                $this->ctrl->setReturn($this, "questions");

                                // set context tabs
                                require_once 'Modules/TestQuestionPool/classes/class.assQuestionGUI.php';
                                $questionGUI = assQuestionGUI::_getQuestionGUI($q_type, $_GET['q_id']);
                                $questionGUI->object->setObjId($this->object->getId());
                                $questionGUI->setQuestionTabs();
                                global $ilHelp;
                                $ilHelp->setScreenIdComponent("qpl");

                                // forward to ilAssQuestionFeedbackGUI
                                require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionFeedbackEditingGUI.php';
                                $gui = new ilAssQuestionFeedbackEditingGUI($questionGUI, $ilCtrl, $ilAccess, $tpl, $ilTabs, $lng);
                                $ilCtrl->forwardCommand($gui);
                                
                                break;
                                
                        case 'ilobjquestionpoolsettingsgeneralgui':
                                require_once 'Modules/TestQuestionPool/classes/class.ilObjQuestionPoolSettingsGeneralGUI.php';
                                $gui = new ilObjQuestionPoolSettingsGeneralGUI($ilCtrl, $ilAccess, $lng, $tpl, $ilTabs, $this);
                                $this->ctrl->forwardCommand($gui);
                                break;

                        case "ilobjtaxonomygui":

                                require_once 'Modules/TestQuestionPool/classes/class.ilObjQuestionPoolTaxonomyEditingCommandForwarder.php';
                                $forwarder = new ilObjQuestionPoolTaxonomyEditingCommandForwarder(
                                                $this->object, $ilDB, $ilPluginAdmin, $ilCtrl, $ilTabs, $lng
                                );
                                
                                $forwarder->forward();
                                
                                break;
                        
                        case 'ilquestionbrowsertablegui':
                                $this->ctrl->forwardCommand($this->buildQuestionBrowserTableGUI($taxIds = array())); // no tax ids required
                                break;
                        
                        case "ilobjquestionpoolgui":
                        case "":
                                
                                if( $cmd == 'questions' )
                                {
                                        $this->ctrl->setParameter($this, 'q_id', '');
                                }
                                
                                $cmd.= "Object";
                                $ret = $this->$cmd();
                                break;
                                
                        default:
                                $this->ctrl->setReturn($this, "questions");
                                include_once "./Modules/TestQuestionPool/classes/class.assQuestionGUI.php";
                                $q_gui = assQuestionGUI::_getQuestionGUI($q_type, $_GET["q_id"]);
                                $q_gui->object->setObjId($this->object->getId());
                                if($this->object->getType() == 'qpl')
                                {
                                        $q_gui->setTaxonomyIds($this->object->getTaxonomyIds());
                                        $this->object->addQuestionChangeListeners($q_gui->object);
                                }
                                $q_gui->setQuestionTabs();
                                global $ilHelp;
                                $ilHelp->setScreenIdComponent("qpl");
                                $ret = $this->ctrl->forwardCommand($q_gui);
                                break;
                }

                if ( !(strtolower($_GET["baseClass"]) == "iladministrationgui" 
                                || strtolower($_GET['baseClass']) == 'ilrepositorygui') 
                        && $this->getCreationMode() != true)
                {
                        $this->tpl->show();
                }
        }
        
        function downloadFileObject()
        {
                $file = explode("_", $_GET["file_id"]);
                include_once("./Modules/File/classes/class.ilObjFile.php");
                $fileObj =& new ilObjFile($file[count($file) - 1], false);
                $fileObj->sendFile();
                exit;
        }
        
        function fullscreenObject()
        {
                include_once("./Modules/TestQuestionPool/classes/class.ilAssQuestionPageGUI.php");
                $page_gui = new ilAssQuestionPageGUI($_GET["pg_id"]);
                $page_gui->showMediaFullscreen();
        }


        function filterObject()
        {
                $this->questionsObject();
        }

        function resetFilterObject()
        {
                $_POST["filter_text"] = "";
                $_POST["sel_filter_type"] = "";
                $this->questionsObject();
        }

        function download_paragraphObject()
        {
                include_once("./Modules/TestQuestionPool/classes/class.ilAssQuestionPage.php");
                $pg_obj = new ilAssQuestionPage($_GET["pg_id"]);
                $pg_obj->send_paragraph ($_GET["par_id"], $_GET["downloadtitle"]);
                exit;
        }

        function uploadQplObject($questions_only = false)
        {
                $this->ctrl->setParameter($this, 'new_type', $_REQUEST['new_type']);
                if ($_FILES["xmldoc"]["error"] > UPLOAD_ERR_OK)
                {
                        ilUtil::sendFailure($this->lng->txt("error_upload"), true);
                        if(!$questions_only)
                        {
                                $this->ctrl->redirect($this, 'create');
                        }
                        return false;
                }
                // create import directory
                include_once "./Modules/TestQuestionPool/classes/class.ilObjQuestionPool.php";
                $basedir = ilObjQuestionPool::_createImportDirectory();

                // copy uploaded file to import directory
                $file = pathinfo($_FILES["xmldoc"]["name"]);
                $full_path = $basedir."/".$_FILES["xmldoc"]["name"];
                $GLOBALS['ilLog']->write(__METHOD__.": full path " . $full_path);
                include_once "./Services/Utilities/classes/class.ilUtil.php";
                ilUtil::moveUploadedFile($_FILES["xmldoc"]["tmp_name"], $_FILES["xmldoc"]["name"], $full_path);
                $GLOBALS['ilLog']->write(__METHOD__.": full path " . $full_path);
                if (strcmp($_FILES["xmldoc"]["type"], "text/xml") == 0)
                {
                        $qti_file = $full_path;
                        ilObjTest::_setImportDirectory($basedir);
                }
                else
                {
                        // unzip file
                        ilUtil::unzip($full_path);
        
                        // determine filenames of xml files
                        $subdir = basename($file["basename"],".".$file["extension"]);
                        ilObjQuestionPool::_setImportDirectory($basedir);
                        $xml_file = ilObjQuestionPool::_getImportDirectory().'/'.$subdir.'/'.$subdir.".xml";
                        $qti_file = ilObjQuestionPool::_getImportDirectory().'/'.$subdir.'/'. str_replace("qpl", "qti", $subdir).".xml";
                }

                // start verification of QTI files
                include_once "./Services/QTI/classes/class.ilQTIParser.php";
                $qtiParser = new ilQTIParser($qti_file, IL_MO_VERIFY_QTI, 0, "");
                $result = $qtiParser->startParsing();
                $founditems =& $qtiParser->getFoundItems();
                if (count($founditems) == 0)
                {
                        // nothing found

                        // delete import directory
                        ilUtil::delDir($basedir);

                        ilUtil::sendFailure($this->lng->txt("qpl_import_no_items"), true);
                        if(!$questions_only)
                        {
                                $this->ctrl->redirect($this, 'create');
                        }
                        return false;
                }
                
                $complete = 0;
                $incomplete = 0;
                foreach ($founditems as $item)
                {
                        if (strlen($item["type"]))
                        {
                                $complete++;
                        }
                        else
                        {
                                $incomplete++;
                        }
                }
                
                if ($complete == 0)
                {
                        // delete import directory
                        ilUtil::delDir($basedir);

                        ilUtil::sendFailure($this->lng->txt("qpl_import_non_ilias_files"), true);
                        if(!$questions_only)
                        {
                                $this->ctrl->redirect($this, 'create');
                        }
                        return false;
                }
                
                $_SESSION["qpl_import_xml_file"] = $xml_file;
                $_SESSION["qpl_import_qti_file"] = $qti_file;
                $_SESSION["qpl_import_subdir"] = $subdir;
                // display of found questions
                $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.qpl_import_verification.html",
                        "Modules/TestQuestionPool");
                $row_class = array("tblrow1", "tblrow2");
                $counter = 0;
                foreach ($founditems as $item)
                {
                        $this->tpl->setCurrentBlock("verification_row");
                        $this->tpl->setVariable("ROW_CLASS", $row_class[$counter++ % 2]);
                        $this->tpl->setVariable("QUESTION_TITLE", $item["title"]);
                        $this->tpl->setVariable("QUESTION_IDENT", $item["ident"]);
                        include_once "./Services/QTI/classes/class.ilQTIItem.php";
                        switch ($item["type"])
                        {
                                case CLOZE_TEST_IDENTIFIER:
                                        $type = $this->lng->txt("assClozeTest");
                                        break;
                                case IMAGEMAP_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assImagemapQuestion");
                                        break;
                                case JAVAAPPLET_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assJavaApplet");
                                        break;
                                case MATCHING_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assMatchingQuestion");
                                        break;
                                case MULTIPLE_CHOICE_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assMultipleChoice");
                                        break;
                                case KPRIM_CHOICE_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assKprimChoice");
                                        break;
                                case SINGLE_CHOICE_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assSingleChoice");
                                        break;
                                case ORDERING_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assOrderingQuestion");
                                        break;
                                case TEXT_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assTextQuestion");
                                        break;
                                case NUMERIC_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assNumeric");
                                        break;
                                case TEXTSUBSET_QUESTION_IDENTIFIER:
                                        $type = $this->lng->txt("assTextSubset");
                                        break;
                                default:
                                        $type = $this->lng->txt($item["type"]);
                                        break;
                        }
                        
                        if (strcmp($type, "-" . $item["type"] . "-") == 0)
                        {
                                global $ilPluginAdmin;
                                $pl_names = $ilPluginAdmin->getActivePluginsForSlot(IL_COMP_MODULE, "TestQuestionPool", "qst");
                                foreach ($pl_names as $pl_name)
                                {
                                        $pl = ilPlugin::getPluginObject(IL_COMP_MODULE, "TestQuestionPool", "qst", $pl_name);
                                        if (strcmp($pl->getQuestionType(), $item["type"]) == 0)
                                        {
                                                $type = $pl->getQuestionTypeTranslation();
                                        }
                                }
                        }
                        $this->tpl->setVariable("QUESTION_TYPE", $type);
                        $this->tpl->parseCurrentBlock();
                }
                
                $this->tpl->setCurrentBlock("import_qpl");
                if (is_file($xml_file))
                {
                        // read file into a string
                        $fh = @fopen($xml_file, "r") or die("");
                        $xml = @fread($fh, filesize($xml_file));
                        @fclose($fh);
                        if (preg_match("/<ContentObject.*?MetaData.*?General.*?Title[^>]*?>([^<]*?)</", $xml, $matches))
                        {
                                $this->tpl->setVariable("VALUE_NEW_QUESTIONPOOL", $matches[1]);
                        }
                }
                $this->tpl->setVariable("TEXT_CREATE_NEW_QUESTIONPOOL", $this->lng->txt("qpl_import_create_new_qpl"));
                $this->tpl->parseCurrentBlock();
                
                $this->tpl->setCurrentBlock("adm_content");
                $this->tpl->setVariable("TEXT_TYPE", $this->lng->txt("question_type"));
                $this->tpl->setVariable("TEXT_TITLE", $this->lng->txt("question_title"));
                $this->tpl->setVariable("FOUND_QUESTIONS_INTRODUCTION", $this->lng->txt("qpl_import_verify_found_questions"));
                if ($questions_only)
                {
                        $this->tpl->setVariable("VERIFICATION_HEADING", $this->lng->txt("import_questions_into_qpl"));
                        $this->tpl->setVariable("FORMACTION", $this->ctrl->getFormAction($this));
                }
                else
                {
                        $this->tpl->setVariable("VERIFICATION_HEADING", $this->lng->txt("import_qpl"));
                        
                        $this->ctrl->setParameter($this, "new_type", $this->type);
                        $this->tpl->setVariable("FORMACTION", $this->ctrl->getFormAction($this));

                        //$this->tpl->setVariable("FORMACTION", $this->getFormAction("save","adm_object.php?cmd=gateway&ref_id=".$_GET["ref_id"]."&new_type=".$this->type));
                }
                $this->tpl->setVariable("ARROW", ilUtil::getImagePath("arrow_downright.svg"));
                $this->tpl->setVariable("VALUE_IMPORT", $this->lng->txt("import"));
                $this->tpl->setVariable("VALUE_CANCEL", $this->lng->txt("cancel"));
                $value_questions_only = 0;
                if ($questions_only) $value_questions_only = 1;
                $this->tpl->setVariable("VALUE_QUESTIONS_ONLY", $value_questions_only);

                $this->tpl->parseCurrentBlock();
                
                return true;
        }
        
        function importVerifiedFileObject()
        {
                if ($_POST["questions_only"] == 1)
                {
                        $newObj =& $this->object;
                }
                else
                {
                        include_once("./Modules/TestQuestionPool/classes/class.ilObjQuestionPool.php");
                        // create new questionpool object
                        $newObj = new ilObjQuestionPool(0, true);
                        // set type of questionpool object
                        $newObj->setType($_GET["new_type"]);
                        // set title of questionpool object to "dummy"
                        $newObj->setTitle("dummy");
                        // set description of questionpool object
                        $newObj->setDescription("questionpool import");
                        // create the questionpool class in the ILIAS database (object_data table)
                        $newObj->create(true);
                        // create a reference for the questionpool object in the ILIAS database (object_reference table)
                        $newObj->createReference();
                        // put the questionpool object in the administration tree
                        $newObj->putInTree($_GET["ref_id"]);
                        // get default permissions and set the permissions for the questionpool object
                        $newObj->setPermissions($_GET["ref_id"]);
                        // notify the questionpool object and all its parent objects that a "new" object was created
                        $newObj->notify("new",$_GET["ref_id"],$_GET["parent_non_rbac_id"],$_GET["ref_id"],$newObj->getRefId());
                }

                // start parsing of QTI files
                include_once "./Services/QTI/classes/class.ilQTIParser.php";
                $qtiParser = new ilQTIParser($_SESSION["qpl_import_qti_file"], IL_MO_PARSE_QTI, $newObj->getId(), $_POST["ident"]);
                $result = $qtiParser->startParsing();

                // import page data
                if (strlen($_SESSION["qpl_import_xml_file"]))
                {
                        include_once ("./Modules/LearningModule/classes/class.ilContObjParser.php");
                        $contParser = new ilContObjParser($newObj, $_SESSION["qpl_import_xml_file"], $_SESSION["qpl_import_subdir"]);
                        $contParser->setQuestionMapping($qtiParser->getImportMapping());
                        $contParser->startParsing();
                }

                // set another question pool name (if possible)
                $qpl_name = $_POST["qpl_new"];
                if ((strcmp($qpl_name, $newObj->getTitle()) != 0) && (strlen($qpl_name) > 0))
                {
                        $newObj->setTitle($qpl_name);
                        $newObj->update();
                }
                
                // delete import directory
                include_once "./Services/Utilities/classes/class.ilUtil.php";
                ilUtil::delDir(dirname(ilObjQuestionPool::_getImportDirectory()));

                if ($_POST["questions_only"] == 1)
                {
                        $this->ctrl->redirect($this, "questions");
                }
                else
                {
                        ilUtil::sendSuccess($this->lng->txt("object_imported"),true);
                        ilUtil::redirect("ilias.php?ref_id=".$newObj->getRefId().
                                "&baseClass=ilObjQuestionPoolGUI");
                }
        }
        
        function cancelImportObject()
        {
                if ($_POST["questions_only"] == 1)
                {
                        $this->ctrl->redirect($this, "questions");
                }
                else
                {
                        $this->ctrl->redirect($this, "cancel");
                }
        }
        
        function uploadObject()
        {
                $upload_valid = true;
                $form = $this->getImportQuestionsForm();
                if($form->checkInput())
                {
                        if(!$this->uploadQplObject(true))
                        {
                                $form->setValuesByPost();
                                $this->importQuestionsObject($form);
                        }
                }
                else
                {
                        $form->setValuesByPost();
                        $this->importQuestionsObject($form);
                }
        }
        
        public function importQuestionsObject(ilPropertyFormGUI $form = null)
        {
                if(!$form instanceof ilPropertyFormGUI)
                {
                        $form = $this->getImportQuestionsForm();
                }
                
                $this->tpl->setContent($form->getHtml());
        }

        protected function getImportQuestionsForm()
        {
                require_once 'Services/Form/classes/class.ilPropertyFormGUI.php';
                $form = new ilPropertyFormGUI();
                $form->setTitle($this->lng->txt('import_question'));
                $form->setFormAction($this->ctrl->getFormAction($this, 'upload'));
                
                $file = new ilFileInputGUI($this->lng->txt('select_file'), 'xmldoc');
                $file->setRequired(true);
                $form->addItem($file);

                $form->addCommandButton('upload', $this->lng->txt('upload'));
                $form->addCommandButton('questions', $this->lng->txt('cancel'));
                
                return $form;
        }

        function &createQuestionObject()
        {
                if( ilObjAssessmentFolder::isAdditionalQuestionContentEditingModePageObjectEnabled() )
                {
                        $addContEditMode = $_POST['add_quest_cont_edit_mode'];
                }
                else
                {
                        $addContEditMode = assQuestion::ADDITIONAL_CONTENT_EDITING_MODE_DEFAULT;
                }

                include_once "./Modules/TestQuestionPool/classes/class.assQuestionGUI.php";
                $q_gui =& assQuestionGUI::_getQuestionGUI($_POST["sel_question_types"]);
                $this->object->addQuestionChangeListeners($q_gui->object);
                $q_gui->object->setObjId($this->object->getId());
                $q_gui->object->setAdditionalContentEditingMode($addContEditMode);
                $q_gui->object->createNewQuestion();
                $this->ctrl->setParameterByClass(get_class($q_gui), "q_id", $q_gui->object->getId());
                $this->ctrl->setParameterByClass(get_class($q_gui), "sel_question_types", $_POST["sel_question_types"]);
                $this->ctrl->redirectByClass(get_class($q_gui), "editQuestion");
        }

        function &createQuestionForTestObject()
        {
            if( !$_REQUEST['q_id'] )
                {
                        require_once 'Modules/Test/classes/class.ilObjAssessmentFolder.php';
                        if( ilObjAssessmentFolder::isAdditionalQuestionContentEditingModePageObjectEnabled() )
                        {
                                $addContEditMode = $_REQUEST['add_quest_cont_edit_mode'];
                        }
                        else
                        {
                                $addContEditMode = assQuestion::ADDITIONAL_CONTENT_EDITING_MODE_DEFAULT;
                        }
                        
                        include_once "./Modules/TestQuestionPool/classes/class.assQuestionGUI.php";
                        $q_gui =& assQuestionGUI::_getQuestionGUI($_GET["sel_question_types"]);
                        $q_gui->object->setObjId($this->object->getId());
                        $q_gui->object->setAdditionalContentEditingMode($addContEditMode);
                        $q_gui->object->createNewQuestion();
                        
                        $class = get_class($q_gui);
                        $qId = $q_gui->object->getId();
            }
            else
                {
                        $class = $_GET["sel_question_types"] . 'gui';
                        $qId = $_REQUEST['q_id'];
            }
                
                $this->ctrl->setParameterByClass($class, "q_id", $qId);
                $this->ctrl->setParameterByClass($class, "sel_question_types", $_REQUEST["sel_question_types"]);
                $this->ctrl->setParameterByClass($class, "prev_qid", $_REQUEST["prev_qid"]);
                
                $this->ctrl->redirectByClass($class, "editQuestion");
        }

        function afterSave(ilObject $a_new_object)
        {
                // always send a message
                ilUtil::sendSuccess($this->lng->txt("object_added"),true);

                ilUtil::redirect("ilias.php?ref_id=".$a_new_object->getRefId().
                        "&baseClass=ilObjQuestionPoolGUI");
        }

        function questionObject()
        {
//echo "<br>ilObjQuestionPoolGUI->questionObject()";
                $type = $_GET["sel_question_types"];
                $this->editQuestionForm($type);
        }

        function deleteQuestionsObject()
        {
                global $rbacsystem;
                
                if (count($_POST["q_id"]) < 1)
                {
                        ilUtil::sendInfo($this->lng->txt("qpl_delete_select_none"), true);
                        $this->ctrl->redirect($this, "questions");
                }
                
                ilUtil::sendQuestion($this->lng->txt("qpl_confirm_delete_questions"));
                $deleteable_questions =& $this->object->getDeleteableQuestionDetails($_POST["q_id"]);
                include_once "./Modules/TestQuestionPool/classes/tables/class.ilQuestionBrowserTableGUI.php";
                $table_gui = new ilQuestionBrowserTableGUI($this, 'questions', (($rbacsystem->checkAccess('write', $_GET['ref_id']) ? true : false)), true);
                $table_gui->setEditable($rbacsystem->checkAccess('write', $_GET['ref_id']));
                $table_gui->setData($deleteable_questions);
                $this->tpl->setVariable('ADM_CONTENT', $table_gui->getHTML());  
        }


        function confirmDeleteQuestionsObject()
        {
                // delete questions after confirmation
                foreach ($_POST["q_id"] as $key => $value)
                {
                        $this->object->deleteQuestion($value);
                        $this->object->cleanupClipboard($value);
                }
                if (count($_POST["q_id"])) ilUtil::sendSuccess($this->lng->txt("qpl_questions_deleted"), true);

                $this->ctrl->setParameter($this, 'q_id', '');
                
                $this->ctrl->redirect($this, "questions");
        }
        
        function cancelDeleteQuestionsObject()
        {
                $this->ctrl->redirect($this, "questions");
        }

        function exportQuestionObject()
        {
                // export button was pressed
                if (count($_POST["q_id"]) > 0)
                {
                        include_once("./Modules/TestQuestionPool/classes/class.ilQuestionpoolExport.php");
                        $qpl_exp = new ilQuestionpoolExport($this->object, "xml", $_POST["q_id"]);
                        $export_file = $qpl_exp->buildExportFile();
                        $filename = $export_file;
                        $filename = preg_replace("/.*\//", "", $filename);
                        include_once "./Services/Utilities/classes/class.ilUtil.php";
                        ilUtil::deliverFile($export_file, $filename);
                        exit();
                }
                else
                {
                        ilUtil::sendInfo($this->lng->txt("qpl_export_select_none"), true);
                }
                $this->ctrl->redirect($this, "questions");
        }
        
        function filterQuestionBrowserObject()
        {
                require_once 'Services/Taxonomy/classes/class.ilObjTaxonomy.php';
                $taxIds = ilObjTaxonomy::getUsageOfObject($this->object->getId());

                include_once "./Modules/TestQuestionPool/classes/tables/class.ilQuestionBrowserTableGUI.php";
                $table_gui = new ilQuestionBrowserTableGUI($this, 'questions', false, false, $taxIds);
                $table_gui->resetOffset();
                $table_gui->writeFilterToSession();
                $this->questionsObject();
        }

        function resetQuestionBrowserObject()
        {
                require_once 'Services/Taxonomy/classes/class.ilObjTaxonomy.php';
                $taxIds = ilObjTaxonomy::getUsageOfObject($this->object->getId());

                include_once "./Modules/TestQuestionPool/classes/tables/class.ilQuestionBrowserTableGUI.php";
                $table_gui = new ilQuestionBrowserTableGUI($this, 'questions', false, false, $taxIds);
                $table_gui->resetOffset();
                $table_gui->resetFilter();
                $this->questionsObject();
        }
        
        function questionsObject()
        {
                global $rbacsystem, $ilUser, $ilCtrl, $ilDB, $lng, $ilPluginAdmin;

                if(get_class($this->object) == "ilObjTest")
                {
                        if ($_GET["calling_test"] > 0)
                        {
                                $ref_id = $_GET["calling_test"];
                                $q_id = $_GET["q_id"];

                                if ($_REQUEST['test_express_mode']) {
                                    if ($q_id)
                                        ilUtil::redirect("ilias.php?ref_id=".$ref_id."&q_id=".$q_id."&test_express_mode=1&cmd=showPage&cmdClass=iltestexpresspageobjectgui&baseClass=ilObjTestGUI");
                                    else
                                        ilUtil::redirect("ilias.php?ref_id=".$ref_id."&test_express_mode=1&cmd=showPage&cmdClass=iltestexpresspageobjectgui&baseClass=ilObjTestGUI");
                                }
                                else
                                    ilUtil::redirect("ilias.php?baseClass=ilObjTestGUI&ref_id=".$ref_id."&cmd=questions");

                        }
                }
                else if(isset($_GET['calling_consumer']) && (int)$_GET['calling_consumer'])
                {
                        $ref_id = (int)$_GET['calling_consumer'];
                        $consumer = ilObjectFactory::getInstanceByRefId($ref_id);
                        if($consumer instanceof ilQuestionEditingFormConsumer)
                        {
                                ilUtil::redirect($consumer->getQuestionEditingFormBackTarget($_GET['consumer_context']));
                        }
                        require_once 'Services/Link/classes/class.ilLink.php';
                        ilUtil::redirect(ilLink::_getLink($ref_id));
                }

                $this->object->purgeQuestions();
                // reset test_id SESSION variable
                $_SESSION["test_id"] = "";
                
                require_once 'Services/Taxonomy/classes/class.ilObjTaxonomy.php';
                $taxIds = ilObjTaxonomy::getUsageOfObject($this->object->getId());

                $table_gui = $this->buildQuestionBrowserTableGUI($taxIds);
                $table_gui->setPreventDoubleSubmission(false);

                if( $rbacsystem->checkAccess('write', $_GET['ref_id']) )
                {
                        $toolbar = new ilToolbarGUI();
                        
                        $toolbar->addButton(
                                        $this->lng->txt("ass_create_question"),
                                        $this->ctrl->getLinkTarget($this, 'createQuestionForm')
                        );
                        
                        $this->tpl->setContent(
                                        $this->ctrl->getHTML($toolbar) . $this->ctrl->getHTML($table_gui)
                        );
                }
                else
                {
                        $this->tpl->setContent( $this->ctrl->getHTML($table_gui) );
                }
                
        if( $this->object->getShowTaxonomies() )
        {
            $this->lng->loadLanguageModule('tax');
                        
            require_once 'Services/Taxonomy/classes/class.ilTaxonomyExplorerGUI.php';

            foreach($taxIds as $taxId)
            {
                                if( $taxId != $this->object->getNavTaxonomyId() )
                                {
                                        continue;
                                }
                                
                                $taxExp = new ilTaxonomyExplorerGUI(
                                                $this, 'showNavTaxonomy', $taxId, 'ilobjquestionpoolgui', 'questions'
                                );
                                
                                if( !$taxExp->handleCommand() )
                                {
                                        $this->tpl->setLeftContent($taxExp->getHTML()."&nbsp;");
                                }
                                
                                break;
            }
        }
        }
        
        private function createQuestionFormObject()
        {
                $form = $this->buildCreateQuestionForm();
                
                $this->tpl->setContent( $this->ctrl->getHTML($form) );
        }
        
        private function buildCreateQuestionForm()
        {
                global $ilUser;
                
                // form
                
                require_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $form = new ilPropertyFormGUI();
                $form->setTitle($this->lng->txt('ass_create_question'));
                $form->setFormAction($this->ctrl->getFormAction($this));
                
                // question type
                
                $options = array();
                foreach( $this->object->getQuestionTypes(false, true) as $translation => $data )
                {
                        $options[$data['type_tag']] = $translation;
                }
                
                require_once("Services/Form/classes/class.ilSelectInputGUI.php");
        $si = new ilSelectInputGUI($this->lng->txt('question_type'), 'sel_question_types');
        $si->setOptions($options);
                //$si->setValue($ilUser->getPref("tst_lastquestiontype"));
                
                $form->addItem($si);
                
                // content editing mode
                
                if( ilObjAssessmentFolder::isAdditionalQuestionContentEditingModePageObjectEnabled() )
                {
                        $ri = new ilRadioGroupInputGUI($this->lng->txt("tst_add_quest_cont_edit_mode"), "add_quest_cont_edit_mode");
                        
                        $ri->addOption(new ilRadioOption(
                                $this->lng->txt('tst_add_quest_cont_edit_mode_default'),
                                        assQuestion::ADDITIONAL_CONTENT_EDITING_MODE_DEFAULT
                        ));

                        $ri->addOption(new ilRadioOption(
                                        $this->lng->txt('tst_add_quest_cont_edit_mode_page_object'),
                                        assQuestion::ADDITIONAL_CONTENT_EDITING_MODE_PAGE_OBJECT
                        ));
                        
                        $ri->setValue(assQuestion::ADDITIONAL_CONTENT_EDITING_MODE_DEFAULT);

                        $form->addItem($ri, true);
                }
                else
                {
                        $hi = new ilHiddenInputGUI("question_content_editing_type");
                        $hi->setValue(assQuestion::ADDITIONAL_CONTENT_EDITING_MODE_DEFAULT);
                        $form->addItem($hi, true);
                }
                
                // commands
                
                $form->addCommandButton('createQuestion', $this->lng->txt('create'));
                $form->addCommandButton('questions', $this->lng->txt('cancel'));
                
                return $form;
        }

        public function printObject()
        {
                global $ilToolbar;

                $ilToolbar->setFormAction($this->ctrl->getFormAction($this, 'print'));
                require_once 'Services/Form/classes/class.ilSelectInputGUI.php';
                $mode = new ilSelectInputGUI($this->lng->txt('output_mode'), 'output');
                $mode->setOptions(array(
                        'overview'           => $this->lng->txt('overview'),
                        'detailed'           => $this->lng->txt('detailed_output_solutions'),
                        'detailed_printview' => $this->lng->txt('detailed_output_printview')
                ));
                $mode->setValue(ilUtil::stripSlashes($_POST['output']));
                
                $ilToolbar->setFormName('printviewOptions');
                $ilToolbar->addInputItem($mode, true);
                $ilToolbar->addFormButton($this->lng->txt('submit'), 'print');

                include_once "./Modules/TestQuestionPool/classes/tables/class.ilQuestionPoolPrintViewTableGUI.php";
                $table_gui = new ilQuestionPoolPrintViewTableGUI($this, 'print', $_POST['output']);
                $data = $this->object->getPrintviewQuestions();
                $totalPoints = 0;
                foreach($data as $d)
                {
                        $totalPoints += $d['points'];
                }
                $table_gui->setTotalPoints($totalPoints);
                $table_gui->initColumns();
                $table_gui->setData($data);
                $this->tpl->setContent($table_gui->getHTML());
        }

        function updateObject()
        {
//              $this->update = $this->object->updateMetaData();
                $this->update = $this->object->update();
                ilUtil::sendSuccess($this->lng->txt("msg_obj_modified"), true);
        }

        function pasteObject()
        {
                if (array_key_exists("qpl_clipboard", $_SESSION))
                {
                        if($this->object->pasteFromClipboard())
                        {
                                ilUtil::sendSuccess($this->lng->txt("qpl_paste_success"), true);
                        }
                        else
                        {
                                ilUtil::sendFailure($this->lng->txt("qpl_paste_error"), true);
                        }
                }
                else
                {
                        ilUtil::sendInfo($this->lng->txt("qpl_paste_no_objects"), true);
                }
                $this->ctrl->redirect($this, "questions");
        }

        public function copyObject()
        {
                if (count($_POST["q_id"]) > 0)
                {
                        foreach ($_POST["q_id"] as $key => $value)
                        {
                                $this->object->copyToClipboard($value);
                        }
                        ilUtil::sendInfo($this->lng->txt("qpl_copy_insert_clipboard"), true);
                }
                else
                {
                        ilUtil::sendInfo($this->lng->txt("qpl_copy_select_none"), true);
                }
                $this->ctrl->redirect($this, "questions");
        }
        
        function moveObject()
        {
                if (count($_POST["q_id"]) > 0)
                {
                        foreach ($_POST["q_id"] as $key => $value)
                        {
                                $this->object->moveToClipboard($value);
                        }
                        ilUtil::sendInfo($this->lng->txt("qpl_move_insert_clipboard"), true);
                }
                else
                {
                        ilUtil::sendInfo($this->lng->txt("qpl_move_select_none"), true);
                }
                $this->ctrl->redirect($this, "questions");
        }
        
        function createExportQTI()
        {
                global $rbacsystem;
                if ($rbacsystem->checkAccess("write", $_GET['ref_id']))
                {
                        include_once("./Modules/TestQuestionPool/classes/class.ilQuestionpoolExport.php");
                        $question_ids =& $this->object->getAllQuestionIds();
                        $qpl_exp = new ilQuestionpoolExport($this->object, 'xml', $question_ids);
                        $qpl_exp->buildExportFile();
                        $this->ctrl->redirectByClass("ilquestionpoolexportgui", "");
                }
        }

        function createExportExcel()
        {
                global $rbacsystem;
                if ($rbacsystem->checkAccess("write", $_GET['ref_id']))
                {
                        include_once("./Modules/TestQuestionPool/classes/class.ilQuestionpoolExport.php");
                        $question_ids =& $this->object->getAllQuestionIds();
                        $qpl_exp = new ilQuestionpoolExport($this->object, 'xls', $question_ids);
                        $qpl_exp->buildExportFile();
                        $this->ctrl->redirectByClass("ilquestionpoolexportgui", "");
                }
        }

        function &editQuestionForTestObject()
        {
                include_once "./Modules/TestQuestionPool/classes/class.assQuestionGUI.php";
                $q_gui =& assQuestionGUI::_getQuestionGUI("", $_GET["q_id"]);
                $this->ctrl->redirectByClass(get_class($q_gui), "editQuestion");
        }

        protected function initImportForm($a_new_type)
        {
                include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $form = new ilPropertyFormGUI();
                $form->setTarget("_top");
                $form->setFormAction($this->ctrl->getFormAction($this));
                $form->setTitle($this->lng->txt("import_qpl"));

                include_once("./Services/Form/classes/class.ilFileInputGUI.php");
                $fi = new ilFileInputGUI($this->lng->txt("import_file"), "xmldoc");
                $fi->setSuffixes(array("zip"));
                $fi->setRequired(true);
                $form->addItem($fi);

                $form->addCommandButton("importFile", $this->lng->txt("import"));
                $form->addCommandButton("cancel", $this->lng->txt("cancel"));

                return $form;
        }
        
        function importFileObject()
        {
                $form = $this->initImportForm($_REQUEST["new_type"]);
                if($form->checkInput())
                {
                        $this->uploadQplObject();
                }

                // display form to correct errors
                $this->tpl->setContent($form->getHTML());
        }

        function addLocatorItems()
        {
                global $ilLocator;
                switch ($this->ctrl->getCmd())
                {
                        case "create":
                        case "importFile":
                        case "cancel":
                                break;
                        default:
                                $ilLocator->addItem($this->object->getTitle(), $this->ctrl->getLinkTarget($this, ""), "", $_GET["ref_id"]);
                                break;
                }
                if ($_GET["q_id"] > 0)
                {
                        include_once "./Modules/TestQuestionPool/classes/class.assQuestionGUI.php";
                        $q_gui = assQuestionGUI::_getQuestionGUI("", $_GET["q_id"]);
                        if($q_gui->object instanceof assQuestion)
                        {
                                $q_gui->object->setObjId($this->object->getId());
                                $title = $q_gui->object->getTitle();
                                if(!$title)
                                {
                                        $title = $this->lng->txt('new').': '.assQuestion::_getQuestionTypeName($q_gui->object->getQuestionType());
                                }
                                $ilLocator->addItem($title, $this->ctrl->getLinkTargetByClass(get_class($q_gui), "editQuestion"));
                        }
                        else
                        {
                                // Workaround for context issues: If no object was found, redirect without q_id parameter
                                $this->ctrl->setParameter($this, 'q_id', '');
                                $this->ctrl->redirect($this);
                        }
                }
        }
        
        function setTitleAndDescription()
        {
                parent::setTitleAndDescription();
                if ($_GET["q_id"] > 0)
                {
                        include_once "./Modules/TestQuestionPool/classes/class.assQuestionGUI.php";
                        $q_gui = assQuestionGUI::_getQuestionGUI("", $_GET["q_id"]);
                        if($q_gui->object instanceof assQuestion)
                        {
                                $q_gui->object->setObjId($this->object->getId());
                                $title = $q_gui->object->getTitle();
                                if(!$title)
                                {
                                        $title = $this->lng->txt('new').': '.assQuestion::_getQuestionTypeName($q_gui->object->getQuestionType());
                                }
                                $this->tpl->setTitle($title);
                                $this->tpl->setDescription($q_gui->object->getComment());
                                if($this->object instanceof ilObjectPlugin)
                                {
                                        $this->tpl->setTitleIcon($this->object->plugin->getImagePath("icon_".$this->object->getType().".svg"), $this->lng->txt("obj_" . $this->object->getType()));
                                }
                                else
                                {
                                        $this->tpl->setTitleIcon(ilObject::_getIcon("", "big", $this->object->getType()));
                                }
                        }
                        else
                        {
                                // Workaround for context issues: If no object was found, redirect without q_id parameter
                                $this->ctrl->setParameter($this, 'q_id', '');
                                $this->ctrl->redirect($this);
                        }
                }
                else
                {
                        $this->tpl->setTitle($this->object->getTitle());
                        $this->tpl->setDescription($this->object->getLongDescription());
                        $this->tpl->setTitleIcon(ilObject::_getIcon("", "big", $this->object->getType()));
                }
        }

        function getTabs(&$tabs_gui)
        {
                global $ilAccess, $ilHelp;

                $currentUserHasWriteAccess = $ilAccess->checkAccess("write", "", $this->object->getRefId());

                $ilHelp->setScreenIdComponent("qpl");
                
                $next_class = strtolower($this->ctrl->getNextClass());
                switch ($next_class)
                {
                        case "":
                        case "ilpermissiongui":
                        case "ilmdeditorgui":
                        case "ilquestionpoolexportgui":
                                break;
                        
                        case 'ilobjtaxonomygui':
                        case 'ilobjquestionpoolsettingsgeneralgui':
                                
                                if( $currentUserHasWriteAccess )
                                {
                                        $this->addSettingsSubTabs($tabs_gui);
                                }
                                
                                break;
                        
                        default:
                                return;
                                break;
                }
                // questions
                $force_active = false;
                $commands = $_POST["cmd"];
                if (is_array($commands))
                {
                        foreach ($commands as $key => $value)
                        {
                                if (preg_match("/^delete_.*/", $key, $matches) || 
                                        preg_match("/^addSelectGap_.*/", $key, $matches) ||
                                        preg_match("/^addTextGap_.*/", $key, $matches) ||
                                        preg_match("/^deleteImage_.*/", $key, $matches) ||
                                        preg_match("/^upload_.*/", $key, $matches) ||
                                        preg_match("/^addSuggestedSolution_.*/", $key, $matches)
                                        )
                                {
                                        $force_active = true;
                                }
                        }
                }
                if (array_key_exists("imagemap_x", $_POST))
                {
                        $force_active = true;
                }
                if (!$force_active)
                {
                        $force_active = ((strtolower($this->ctrl->getCmdClass()) == strtolower(get_class($this)) || strlen($this->ctrl->getCmdClass()) == 0) &&
                                $this->ctrl->getCmd() == "")
                                ? true
                                : false;
                }
                $tabs_gui->addTarget("assQuestions",
                         $this->ctrl->getLinkTarget($this, "questions"),
                         array("questions", "filter", "resetFilter", "createQuestion", 
                                "importQuestions", "deleteQuestions", "filterQuestionBrowser",
                                "view", "preview", "editQuestion", "exec_pg",
                                "addItem", "upload", "save", "cancel", "addSuggestedSolution",
                                "cancelExplorer", "linkChilds", "removeSuggestedSolution",
                                "add", "addYesNo", "addTrueFalse", "createGaps", "saveEdit",
                                "setMediaMode", "uploadingImage", "uploadingImagemap", "addArea",
                                "deletearea", "saveShape", "back", "addPair", "uploadingJavaapplet",
                                "addParameter", "assessment", "addGIT", "addST", "addPG", "delete",
                                "toggleGraphicalAnswers", "deleteAnswer", "deleteImage", "removeJavaapplet"),
                         "", "", $force_active);

                if ($ilAccess->checkAccess("visible", "", $this->ref_id))
                {
                        $tabs_gui->addTarget("info_short",
                                 $this->ctrl->getLinkTarget($this, "infoScreen"),
                                array("infoScreen", "showSummary"));            
                }
                
                if ($ilAccess->checkAccess("write", "", $_GET['ref_id']))
                {
                        // properties
                        $tabs_gui->addTarget(
                                        'settings', $this->ctrl->getLinkTargetByClass('ilObjQuestionPoolSettingsGeneralGUI'),
                                        array(), array('ilObjQuestionPoolSettingsGeneralGUI', 'ilObjTaxonomyGUI')
                        );
                }

                // print view
                $tabs_gui->addTarget("print_view",
                         $this->ctrl->getLinkTarget($this,'print'),
                         array("print"),
                         "", "");

                if ($ilAccess->checkAccess("write", "", $this->object->getRefId()))
                {
                        // meta data
                        $tabs_gui->addTarget("meta_data",
                                 $this->ctrl->getLinkTargetByClass('ilmdeditorgui','listSection'),
                                 "", "ilmdeditorgui");

//                      $tabs_gui->addTarget("export",
//                               $this->ctrl->getLinkTarget($this,'export'),
//                               array("export", "createExportFile", "confirmDeleteExportFile", "downloadExportFile"),
//                               "", "");
                }

                if( $currentUserHasWriteAccess )
                {
                        $tabs_gui->addTarget("export",
                                $this->ctrl->getLinkTargetByClass("ilquestionpoolexportgui", ""),
                                "", "ilquestionpoolexportgui");
                }

                if ($ilAccess->checkAccess("edit_permission", "", $this->object->getRefId()))
                {
                        $tabs_gui->addTarget("perm_settings",
                        $this->ctrl->getLinkTargetByClass(array(get_class($this),'ilpermissiongui'), "perm"), array("perm","info","owner"), 'ilpermissiongui');
                }
        }
        
        private function addSettingsSubTabs(ilTabsGUI $tabs)
        {
                $tabs->addSubTabTarget(
                                'qpl_settings_subtab_general',
                                $this->ctrl->getLinkTargetByClass('ilObjQuestionPoolSettingsGeneralGUI'),
                                '', 'ilObjQuestionPoolSettingsGeneralGUI'
                );
                
                $tabs->addSubTabTarget(
                                'qpl_settings_subtab_taxonomies',
                                $this->ctrl->getLinkTargetByClass('ilObjTaxonomyGUI', 'editAOTaxonomySettings'),
                                '', 'ilObjTaxonomyGUI'
                );
        }
        
        function infoScreenObject()
        {
                $this->ctrl->setCmd("showSummary");
                $this->ctrl->setCmdClass("ilinfoscreengui");
                $this->infoScreenForward();
        }
        
        function infoScreenForward()
        {
                global $ilErr, $ilAccess;
                
                if(!$ilAccess->checkAccess("visible", "", $this->ref_id))
                {
                        $ilErr->raiseError($this->lng->txt("msg_no_perm_read"));
                }

                include_once("./Services/InfoScreen/classes/class.ilInfoScreenGUI.php");
                $info = new ilInfoScreenGUI($this);
                $info->enablePrivateNotes();

                // standard meta data
                $info->addMetaDataSections($this->object->getId(), 0, $this->object->getType());
                
                $this->ctrl->forwardCommand($info);
        }

        public static function _goto($a_target)
        {
                global $ilAccess, $ilErr, $lng;

                if ($ilAccess->checkAccess("write", "", $a_target))
                {
                        $_GET["baseClass"] = "ilObjQuestionPoolGUI";
                        $_GET["cmd"] = "questions";
                        $_GET["ref_id"] = $a_target;
                        include_once("ilias.php");
                        exit;
                }
                else if ($ilAccess->checkAccess("read", "", ROOT_FOLDER_ID))
                {
                        ilUtil::sendInfo(sprintf($lng->txt("msg_no_perm_read_item"),
                                ilObject::_lookupTitle(ilObject::_lookupObjId($a_target))), true);
                        ilObjectGUI::_gotoRepositoryRoot();
                }
                $ilErr->raiseError($lng->txt("msg_no_perm_read_lm"), $ilErr->FATAL);
        }
        
        private function buildQuestionBrowserTableGUI($taxIds)
        {
                global $rbacsystem, $ilDB, $lng, $ilPluginAdmin;

                include_once "./Modules/TestQuestionPool/classes/tables/class.ilQuestionBrowserTableGUI.php";
                $table_gui = new ilQuestionBrowserTableGUI($this, 'questions', (($rbacsystem->checkAccess('write', $_GET['ref_id']) ? true : false)), false, $taxIds);
                $table_gui->setEditable($rbacsystem->checkAccess('write', $_GET['ref_id']));

                require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionList.php';
                $questionList = new ilAssQuestionList($ilDB, $lng, $ilPluginAdmin, $this->object->getId());
                
                foreach ($table_gui->getFilterItems() as $item)
                {
                        if( substr($item->getPostVar(), 0, strlen('tax_')) == 'tax_' )
                        {
                                $v = $item->getValue();
                                
                                if( is_array($v) && count($v) && !(int)$v[0] )
                                {
                                        continue;
                                }
                                
                                $taxId = substr($item->getPostVar(), strlen('tax_'));
                                $questionList->addTaxonomyFilter($taxId, $item->getValue());
                        }
                        elseif( $item->getValue() !== false )
                        {
                                $questionList->addFieldFilter($item->getPostVar(), $item->getValue());
                        }
                }
                
                if( $this->object->isNavTaxonomyActive() && (int)$_GET['tax_node'] )
                {
                        $questionList->addTaxonomyFilter( $this->object->getNavTaxonomyId(), array((int)$_GET['tax_node']) );
                }

                $questionList->load();
                $data = $questionList->getQuestionDataArray();
                
                $table_gui->setData($data);
                
                return $table_gui;
        }
        
        

} // END class.ilObjQuestionPoolGUI
?>