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;
    
    public function __construct()
    {
        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');

        parent::__construct("", $_GET["ref_id"], true, false);
    }

    public function executeCommand()
    {
        global $ilUser, $ilLocator, $ilAccess, $ilNavigationHistory, $tpl, $ilCtrl, $ilErr, $ilTabs, $lng, $ilDB, $ilPluginAdmin, $ilias;
        
        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 'ilobjectmetadatagui':
                if (!$ilAccess->checkAccess('write', '', $this->object->getRefId())) {
                    $ilErr->raiseError($this->lng->txt('permission_denied'), $ilErr->WARNING);
                }
                include_once 'Services/Object/classes/class.ilObjectMetaDataGUI.php';
                $md_gui = new ilObjectMetaDataGUI($this->object);
                $this->ctrl->forwardCommand($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, $ilUser);
                
                $gui->initQuestion((int) $_GET['q_id'], $this->object->getId());
                $gui->initPreviewSettings($this->object->getRefId());
                $gui->initPreviewSession($ilUser->getId(), $this->fetchAuthoringQuestionIdParamater());
                $gui->initHintTracking();
                $gui->initStyleSheets();

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

                $this->ctrl->forwardCommand($gui);
                break;
                
            case "ilassquestionpagegui":
                include_once("./Services/Style/Content/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("", $this->fetchAuthoringQuestionIdParamater());
                $q_gui->setRenderPurpose(assQuestionGUI::RENDER_PURPOSE_PREVIEW);
                $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->obj->addUpdateListener(
                    $question,
                    'updateTimestamp'
                );
                $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('xml', $this->lng->txt('qpl_export_xml'));
                $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, $this->fetchAuthoringQuestionIdParamater());
                $questionGUI->object->setObjId($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);
                
                global $DIC; /* @var ILIAS\DI\Container $DIC */
                
                $gui->setEditingEnabled(
                    $DIC->access()->checkAccess('write', '', $this->object->getRefId())
                );
                
                $ilCtrl->forwardCommand($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, $this->fetchAuthoringQuestionIdParamater());
                $questionGUI->object->setObjId($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, $this->fetchAuthoringQuestionIdParamater());
                $questionGUI->object->setObjId($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 'ilquestionpoolskilladministrationgui':

                require_once 'Modules/TestQuestionPool/classes/class.ilQuestionPoolSkillAdministrationGUI.php';
                $gui = new ilQuestionPoolSkillAdministrationGUI(
                    $ilias,
                    $ilCtrl,
                    $ilAccess,
                    $ilTabs,
                    $tpl,
                    $lng,
                    $ilDB,
                    $ilPluginAdmin,
                    $this->object,
                    $this->ref_id
                );
                
                $this->ctrl->forwardCommand($gui);
                
                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, $this->fetchAuthoringQuestionIdParamater());
                $q_gui->setEditContext(assQuestionGUI::EDIT_CONTEXT_AUTHORING);
                $q_gui->object->setObjId($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();
        }
    }
    
    protected function exportObject()
    {
        global $DIC; /* @var ILIAS\DI\Container $DIC */
        $DIC->ctrl()->redirectByClass('ilQuestionPoolExportGUI');
    }
    
    public 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;
    }
    
    public function fullscreenObject()
    {
        include_once("./Modules/TestQuestionPool/classes/class.ilAssQuestionPageGUI.php");
        $page_gui = new ilAssQuestionPageGUI($_GET["pg_id"]);
        $page_gui->showMediaFullscreen();
    }


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

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

    public 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;
    }

    public 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;

        $this->tpl->addBlockFile("ADM_CONTENT", "adm_content", "tpl.qpl_import_verification.html", "Modules/TestQuestionPool");

        require_once 'Modules/TestQuestionPool/classes/tables/class.ilQuestionPoolImportVerificationTableGUI.php';
        $table = new ilQuestionPoolImportVerificationTableGUI($this, 'uploadQplObject');
        $rows  = array();

        foreach ($founditems as $item) {
            $row = array(
                'title' => $item['title'],
                '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 LONG_MENU_QUESTION_IDENTIFIER:
                    $type = $this->lng->txt("assLongMenu");
                    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();
                    }
                }
            }

            $row['type'] = $type;

            $rows[] = $row;
        }
        $table->setData($rows);

        $this->tpl->setCurrentBlock("import_qpl");
        if (is_file($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("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));
        }

        $value_questions_only = 0;
        if ($questions_only) {
            $value_questions_only = 1;
        }
        $this->tpl->setVariable("VALUE_QUESTIONS_ONLY", $value_questions_only);
        $this->tpl->setVariable("VERIFICATION_TABLE", $table->getHtml());
        $this->tpl->setVariable("VERIFICATION_FORM_NAME", $table->getFormName());

        $this->tpl->parseCurrentBlock();
        
        return true;
    }
    
    public 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"]);
        }

        if (is_file($_SESSION["qpl_import_dir"] . '/' . $_SESSION["qpl_import_subdir"] . "/manifest.xml")) {
            $_SESSION["qpl_import_idents"] = $_POST["ident"];
            
            $fileName = $_SESSION["qpl_import_subdir"] . '.zip';
            $fullPath = $_SESSION["qpl_import_dir"] . '/' . $fileName;
            
            include_once("./Services/Export/classes/class.ilImport.php");
            $imp = new ilImport((int) $_GET["ref_id"]);
            $map = $imp->getMapping();
            $map->addMapping("Modules/TestQuestionPool", "qpl", "new_id", $newObj->getId());
            $imp->importObject($newObj, $fullPath, $fileName, "qpl", "Modules/TestQuestionPool", true);
        } else {
            // 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();

                // #20494
                $newObj->fromXML($_SESSION["qpl_import_xml_file"]);
            }

            // set another question pool name (if possible)
            if (isset($_POST["qpl_new"]) && strlen($_POST["qpl_new"])) {
                $newObj->setTitle($_POST["qpl_new"]);
            }

            $newObj->update();
            $newObj->saveToDb();
        }
        
        // 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");
        }
    }
    
    public function cancelImportObject()
    {
        if ($_POST["questions_only"] == 1) {
            $this->ctrl->redirect($this, "questions");
        } else {
            $this->ctrl->redirect($this, "cancel");
        }
    }
    
    public 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;
    }

    public 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");
    }

    public 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");
    }

    public 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");
    }

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

    public function deleteQuestionsObject()
    {
        global $rbacsystem;

        $questionIdsToDelete = isset($_POST['q_id']) ? (array) $_POST['q_id'] : array();
        if (0 === count($questionIdsToDelete) && isset($_GET['q_id'])) {
            $questionIdsToDelete = array($_GET['q_id']);
        }

        $questionIdsToDelete = array_filter(array_map('intval', $questionIdsToDelete));
        if (0 === count($questionIdsToDelete)) {
            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($questionIdsToDelete);
        include_once "./Modules/TestQuestionPool/classes/tables/class.ilQuestionBrowserTableGUI.php";
        $table_gui = new ilQuestionBrowserTableGUI($this, 'questions', (($rbacsystem->checkAccess('write', (int) $_GET['ref_id']) ? true : false)), true);
        $table_gui->setShowRowsSelector(false);
        $table_gui->setLimit(PHP_INT_MAX);
        $table_gui->setEditable($rbacsystem->checkAccess('write', (int) $_GET['ref_id']));
        $table_gui->setData($deleteable_questions);
        $this->tpl->setVariable('ADM_CONTENT', $table_gui->getHTML());
    }


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

    public 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");
    }
    
    public 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();
    }

    public 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();
    }
    
    protected function renoveImportFailsObject()
    {
        require_once 'Modules/TestQuestionPool/classes/questions/class.ilAssQuestionSkillAssignmentImportFails.php';
        $qsaImportFails = new ilAssQuestionSkillAssignmentImportFails($this->object->getId());
        $qsaImportFails->deleteRegisteredImportFails();
        
        $this->ctrl->redirect($this, 'infoScreen');
    }
    
    public 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=" . $ref_id . "&cmd=questions");
                }
            }
        } elseif (isset($_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 'Modules/TestQuestionPool/classes/questions/class.ilAssQuestionSkillAssignmentImportFails.php';
        $qsaImportFails = new ilAssQuestionSkillAssignmentImportFails($this->object->getId());
        if ($qsaImportFails->failedImportsRegistered()) {
            require_once 'Services/UIComponent/Button/classes/class.ilLinkButton.php';
            $button = ilLinkButton::getInstance();
            $button->setUrl($this->ctrl->getLinkTarget($this, 'renoveImportFails'));
            $button->setCaption('ass_skl_import_fails_remove_btn');
            
            ilUtil::sendFailure($qsaImportFails->getFailedImportsMessage($this->lng) . '<br />' . $button->render());
        }
        
        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();
            
            require_once 'Services/UIComponent/Button/classes/class.ilLinkButton.php';
            $btn = ilLinkButton::getInstance();
            $btn->setCaption('ass_create_question');
            $btn->setUrl($this->ctrl->getLinkTarget($this, 'createQuestionForm'));
            $btn->setPrimary(true);
            $toolbar->addButtonInstance($btn);


            $btnImport = ilLinkButton::getInstance();
            $btnImport->setCaption('import');
            $btnImport->setUrl($this->ctrl->getLinkTarget($this, 'importQuestions'));
            $toolbar->addButtonInstance($btnImport);

            if (array_key_exists("qpl_clipboard", $_SESSION) && count($_SESSION['qpl_clipboard'])) {
                $btnPaste = ilLinkButton::getInstance();
                $btnPaste->setCaption('paste');
                $btnPaste->setUrl($this->ctrl->getLinkTarget($this, 'paste'));
                $toolbar->addButtonInstance($btnPaste);
            }

            $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;
            }
        }
    }
    
    protected function fetchAuthoringQuestionIdParamater()
    {
        $qId = (int) $_GET['q_id'];
        
        if ($this->object->checkQuestionParent($qId)) {
            return $qId;
        }
        
        throw new ilTestQuestionPoolException('question id does not relate to parent object!');
    }
    
    private function createQuestionFormObject()
    {
        global $DIC; /* @var \ILIAS\DI\Container $DIC */
        $ilHelp = $DIC['ilHelp']; /* @var ilHelpGUI $ilHelp */
        
        $ilHelp->setScreenId('assQuestions');
        
        if (ilObjAssessmentFolder::isAdditionalQuestionContentEditingModePageObjectEnabled()) {
            $ilHelp->setSubScreenId('createQuestion_editMode');
        } else {
            $ilHelp->setSubScreenId('createQuestion');
        }
        
        $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());
    }

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

    public 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 (isset($_POST["q_id"]) && is_array($_POST["q_id"]) && count($_POST["q_id"]) > 0) {
            foreach ($_POST["q_id"] as $key => $value) {
                $this->object->copyToClipboard($value);
            }
            ilUtil::sendInfo($this->lng->txt("qpl_copy_insert_clipboard"), true);
        } elseif (isset($_GET['q_id']) && $_GET['q_id'] > 0) {
            $this->object->copyToClipboard((int) $_GET['q_id']);
            ilUtil::sendInfo($this->lng->txt("qpl_copy_insert_clipboard"), true);
        } else {
            ilUtil::sendInfo($this->lng->txt("qpl_copy_select_none"), true);
        }
        $this->ctrl->redirect($this, "questions");
    }
    
    public function moveObject()
    {
        if (isset($_POST["q_id"]) && is_array($_POST["q_id"]) && count($_POST["q_id"]) > 0) {
            foreach ($_POST["q_id"] as $key => $value) {
                $this->object->moveToClipboard($value);
            }
            ilUtil::sendInfo($this->lng->txt("qpl_move_insert_clipboard"), true);
        } elseif (isset($_GET['q_id']) && $_GET['q_id'] > 0) {
            $this->object->moveToClipboard((int) $_GET['q_id']);
            ilUtil::sendInfo($this->lng->txt("qpl_copy_insert_clipboard"), true);
        } else {
            ilUtil::sendInfo($this->lng->txt("qpl_move_select_none"), true);
        }
        $this->ctrl->redirect($this, "questions");
    }

    public 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", "");
        }
    }

    public 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;
    }
    
    protected function importFileObject($parent_id = null, $a_catch_errors = true)
    {
        $form = $this->initImportForm($_REQUEST["new_type"]);
        if ($form->checkInput()) {
            $this->uploadQplObject();
        }

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

    public 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);
            }
        }
    }
    
    public 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());
                $this->tpl->setTitleIcon(ilObject2::_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(ilObject2::_getIcon("", "big", $this->object->getType()));
        }
    }

    public function getTabs()
    {
        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 "ilobjectmetadatagui":
            case "ilquestionpoolexportgui":
            case "ilquestionpoolskilladministrationgui":
                break;
            
            case 'ilobjtaxonomygui':
            case 'ilobjquestionpoolsettingsgeneralgui':
                
                if ($currentUserHasWriteAccess) {
                    $this->addSettingsSubTabs($this->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;
        }
        $this->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("read", "", $this->ref_id) || $ilAccess->checkAccess("visible", "", $this->ref_id)) {
            $this->tabs_gui->addTarget(
                "info_short",
                $this->ctrl->getLinkTarget($this, "infoScreen"),
                array("infoScreen", "showSummary")
            );
        }
        
        if ($ilAccess->checkAccess("write", "", $_GET['ref_id'])) {
            // properties
            $this->tabs_gui->addTarget(
                'settings',
                $this->ctrl->getLinkTargetByClass('ilObjQuestionPoolSettingsGeneralGUI'),
                array(),
                array('ilObjQuestionPoolSettingsGeneralGUI', 'ilObjTaxonomyGUI')
            );

            // skill service
            if ($this->isSkillsTabRequired()) {
                require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionSkillAssignmentsGUI.php';

                $link = $this->ctrl->getLinkTargetByClass(
                    array('ilQuestionPoolSkillAdministrationGUI', 'ilAssQuestionSkillAssignmentsGUI'),
                    ilAssQuestionSkillAssignmentsGUI::CMD_SHOW_SKILL_QUEST_ASSIGNS
                );

                $this->tabs_gui->addTarget('qpl_tab_competences', $link, array(), array());
            }
        }

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

        if ($ilAccess->checkAccess("write", "", $this->object->getRefId())) {
            // meta data
            include_once "Services/Object/classes/class.ilObjectMetaDataGUI.php";
            $mdgui = new ilObjectMetaDataGUI($this->object);
            $mdtab = $mdgui->getTab();
            if ($mdtab) {
                $this->tabs_gui->addTarget(
                    "meta_data",
                    $mdtab,
                    "",
                    "ilmdeditorgui"
                );
            }

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

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

        if ($ilAccess->checkAccess("edit_permission", "", $this->object->getRefId())) {
            $this->tabs_gui->addTarget(
                "perm_settings",
                $this->ctrl->getLinkTargetByClass(array(get_class($this),'ilpermissiongui'), "perm"),
                array("perm","info","owner"),
                'ilpermissiongui'
            );
        }
    }
    
    private function isSkillsTabRequired()
    {
        if (!($this->object instanceof ilObjQuestionPool)) {
            return false;
        }
        
        if (!$this->object->isSkillServiceEnabled()) {
            return false;
        }
        
        if (!ilObjQuestionPool::isSkillManagementGloballyActivated()) {
            return false;
        }
        
        return true;
    }
    
    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'
        );
    }
    
    public function infoScreenObject()
    {
        $this->ctrl->setCmd("showSummary");
        $this->ctrl->setCmdClass("ilinfoscreengui");
        $this->infoScreenForward();
    }
    
    public 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) || $ilAccess->checkAccess('read', '', $a_target)) {
            $_GET['cmdClass']  = 'ilObjQuestionPoolGUI';
            $_GET['cmd']       = 'questions';
            $_GET['baseClass'] = 'ilRepositoryGUI';
            $_GET["ref_id"]    = $a_target;
            include_once("ilias.php");
            exit;
        } elseif ($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);
        $questionList->setParentObjId($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(),
                    $this->object->getId(),
                    $this->object->getType()
                );
            } elseif ($item->getValue() !== false) {
                $questionList->addFieldFilter($item->getPostVar(), $item->getValue());
            }
        }
        
        if ($this->object->isNavTaxonomyActive() && (int) $_GET['tax_node']) {
            require_once 'Services/Taxonomy/classes/class.ilTaxonomyTree.php';
            $taxTree = new ilTaxonomyTree($this->object->getNavTaxonomyId());
            $rootNodeId = $taxTree->readRootId();
            
            if ((int) $_GET['tax_node'] != $rootNodeId) {
                $questionList->addTaxonomyFilter(
                    $this->object->getNavTaxonomyId(),
                    array((int) $_GET['tax_node']),
                    $this->object->getId(),
                    $this->object->getType()
                );
            }
        }

        $questionList->load();
        $data = $questionList->getQuestionDataArray();
        
        $table_gui->setData($data);
        
        return $table_gui;
    }
} // END class.ilObjQuestionPoolGUI