class.ilTestPlayerDynamicQuestionSetGUI.php

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

require_once 'Modules/Test/classes/class.ilTestPlayerAbstractGUI.php';

class ilTestPlayerDynamicQuestionSetGUI extends ilTestPlayerAbstractGUI
{
    private $dynamicQuestionSetConfig = null;

    protected $testSequence;

    protected $testSession;
    
    public function executeCommand()
    {
        global $DIC;
        $ilDB = $DIC['ilDB'];
        $lng = $DIC['lng'];
        $ilPluginAdmin = $DIC['ilPluginAdmin'];
        $ilTabs = $DIC['ilTabs'];
        $tree = $DIC['tree'];

        $ilTabs->clearTargets();
        
        $this->ctrl->saveParameter($this, "sequence");
        $this->ctrl->saveParameter($this, "active_id");

        $this->initAssessmentSettings();

        require_once 'Modules/Test/classes/class.ilObjTestDynamicQuestionSetConfig.php';
        $this->dynamicQuestionSetConfig = new ilObjTestDynamicQuestionSetConfig($tree, $ilDB, $ilPluginAdmin, $this->object);
        $this->dynamicQuestionSetConfig->loadFromDb();

        $testSessionFactory = new ilTestSessionFactory($this->object);
        $this->testSession = $testSessionFactory->getSession($_GET['active_id']);

        $this->ensureExistingTestSession($this->testSession);
        $this->checkTestSessionUser($this->testSession);
        $this->initProcessLocker($this->testSession->getActiveId());
        
        $testSequenceFactory = new ilTestSequenceFactory($ilDB, $lng, $ilPluginAdmin, $this->object);
        $this->testSequence = $testSequenceFactory->getSequenceByTestSession($this->testSession);
        $this->testSequence->loadFromDb();

        if ($this->object->isInstantFeedbackAnswerFixationEnabled()) {
            $this->testSequence->setPreventCheckedQuestionsFromComingUpEnabled(true);
        }

        include_once 'Services/jQuery/classes/class.iljQueryUtil.php';
        iljQueryUtil::initjQuery();
        include_once "./Services/YUI/classes/class.ilYuiUtil.php";
        ilYuiUtil::initConnectionWithAnimation();
        if ($this->object->getKioskMode()) {
            include_once 'Services/UIComponent/Overlay/classes/class.ilOverlayGUI.php';
            ilOverlayGUI::initJavascript();
        }
        
        $this->handlePasswordProtectionRedirect();
        
        $cmd = $this->ctrl->getCmd();
        $nextClass = $this->ctrl->getNextClass($this);
        
        switch ($nextClass) {
            case 'ilassquestionpagegui':

                $questionId = $this->testSession->getCurrentQuestionId();

                require_once "./Modules/TestQuestionPool/classes/class.ilAssQuestionPageGUI.php";
                $page_gui = new ilAssQuestionPageGUI($questionId);
                $ret = $this->ctrl->forwardCommand($page_gui);
                break;

            case 'ilassquestionhintrequestgui':

                $this->ctrl->saveParameter($this, 'pmode');
                
                $questionGUI = $this->object->createQuestionGUI(
                    "",
                    $this->testSession->getCurrentQuestionId()
                );

                require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionHintTracking.php';
                $questionHintTracking = new ilAssQuestionHintTracking(
                    $questionGUI->object->getId(),
                    $this->testSession->getActiveId(),
                    $this->testSession->getPass()
                );

                require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionHintRequestGUI.php';
                $gui = new ilAssQuestionHintRequestGUI(
                    $this,
                    ilTestPlayerCommands::SHOW_QUESTION,
                    $questionGUI,
                    $questionHintTracking
                );
                
// fau: testNav - save the 'answer changed status' for viewing hint requests
                $this->setAnswerChangedParameter($this->getAnswerChangedParameter());
// fau.
                $this->ctrl->forwardCommand($gui);
                
                break;
                
            case 'ildynamicquestionsetstatistictablegui':
                
                $this->ctrl->forwardCommand($this->buildQuestionSetFilteredStatisticTableGUI());
                
                break;

            case 'iltestpasswordprotectiongui':
                require_once 'Modules/Test/classes/class.ilTestPasswordProtectionGUI.php';
                $gui = new ilTestPasswordProtectionGUI($this->ctrl, $this->tpl, $this->lng, $this, $this->passwordChecker);
                $ret = $this->ctrl->forwardCommand($gui);
                break;
            
            default:
                
                $cmd .= 'Cmd';
                $ret = &$this->$cmd();
                break;
        }
        
        return $ret;
    }
    
    protected function getCurrentQuestionId()
    {
        return $this->testSession->getCurrentQuestionId();
    }

    protected function resumePlayerCmd()
    {
        if ($this->object->checkMaximumAllowedUsers() == false) {
            return $this->showMaximumAllowedUsersReachedMessage();
        }
        
        $this->handleUserSettings();
        
        if ($this->dynamicQuestionSetConfig->isAnyQuestionFilterEnabled()) {
            $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION_SELECTION);
        }
        
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }
    
    protected function startTestCmd()
    {
        $this->testSession->setCurrentQuestionId(null); // no question "came up" yet
        
        $this->testSession->saveToDb();
        
        $this->ctrl->setParameter($this, 'active_id', $this->testSession->getActiveId());

        assQuestion::_updateTestPassResults($this->testSession->getActiveId(), $this->testSession->getPass(), false, null, $this->object->id);

        $_SESSION['active_time_id'] = $this->object->startWorkingTime(
            $this->testSession->getActiveId(),
            $this->testSession->getPass()
        );
        
        $this->ctrl->saveParameter($this, 'tst_javascript');
        
        if ($this->dynamicQuestionSetConfig->isAnyQuestionFilterEnabled()) {
            $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION_SELECTION);
        }
        
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }
    
    protected function showQuestionSelectionCmd()
    {
        $this->prepareSummaryPage();
        
        $this->testSequence->loadQuestions(
            $this->dynamicQuestionSetConfig,
            $this->testSession->getQuestionSetFilterSelection()
        );
        
        $this->testSequence->cleanupQuestions($this->testSession);

        $this->testSequence->saveToDb();
            
        require_once 'Services/UIComponent/Toolbar/classes/class.ilToolbarGUI.php';
        $toolbarGUI = new ilToolbarGUI();
        
        require_once 'Services/UIComponent/Button/classes/class.ilLinkButton.php';
        $button = ilLinkButton::getInstance();
        $button->setUrl($this->getStartTestFromQuestionSelectionLink());
        $button->setCaption($this->getEnterTestButtonLangVar());
        $button->setPrimary(true);
        $toolbarGUI->addButtonInstance($button);

        if ($this->object->getShowCancel()) {
            $button = ilLinkButton::getInstance();
            $button->setUrl($this->ctrl->getLinkTarget(
                $this,
                ilTestPlayerCommands::SUSPEND_TEST
            ));
            $button->setCaption('cancel_test');
            $toolbarGUI->addButtonInstance($button);
        }
        
        if ($this->object->isPassDeletionAllowed()) {
            require_once 'Modules/Test/classes/confirmations/class.ilTestPassDeletionConfirmationGUI.php';
            
            $toolbarGUI->addButton(
                $this->lng->txt('tst_dyn_test_pass_deletion_button'),
                $this->getPassDeletionTarget(ilTestPassDeletionConfirmationGUI::CONTEXT_DYN_TEST_PLAYER)
            );
        }
        
        $filteredData = array($this->buildQuestionSetAnswerStatisticRowArray(
            $this->testSequence->getFilteredQuestionsData(),
            $this->testSequence->getTrackedQuestionList()
        )); #vd($filteredData);
        $filteredTableGUI = $this->buildQuestionSetFilteredStatisticTableGUI();
        $filteredTableGUI->setData($filteredData);

        $completeData = array($this->buildQuestionSetAnswerStatisticRowArray(
            $this->testSequence->getCompleteQuestionsData(),
            $this->testSequence->getTrackedQuestionList()
        )); #vd($completeData);
        $completeTableGUI = $this->buildQuestionSetCompleteStatisticTableGUI();
        $completeTableGUI->setData($completeData);

        $content = $this->ctrl->getHTML($toolbarGUI);
        $content .= $this->ctrl->getHTML($filteredTableGUI);
        $content .= $this->ctrl->getHTML($completeTableGUI);

        $this->tpl->setVariable('TABLE_LIST_OF_QUESTIONS', $content);

        if ($this->object->getEnableProcessingTime()) {
            $this->outProcessingTime($this->testSession->getActiveId());
        }
    }
    
    protected function filterQuestionSelectionCmd()
    {
        $tableGUI = $this->buildQuestionSetFilteredStatisticTableGUI();
        $tableGUI->writeFilterToSession();

        $taxFilterSelection = array();
        $answerStatusFilterSelection = ilAssQuestionList::ANSWER_STATUS_FILTER_ALL_NON_CORRECT;
        
        foreach ($tableGUI->getFilterItems() as $item) {
            if (strpos($item->getPostVar(), 'tax_') !== false) {
                $taxId = substr($item->getPostVar(), strlen('tax_'));
                $taxFilterSelection[$taxId] = $item->getValue();
            } elseif ($item->getPostVar() == 'question_answer_status') {
                $answerStatusFilterSelection = $item->getValue();
            }
        }
        
        $this->testSession->getQuestionSetFilterSelection()->setTaxonomySelection($taxFilterSelection);
        $this->testSession->getQuestionSetFilterSelection()->setAnswerStatusSelection($answerStatusFilterSelection);
        $this->testSession->saveToDb();
        
        $this->testSequence->resetTrackedQuestionList();
        $this->testSequence->saveToDb();

        
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION_SELECTION);
    }
    
    protected function resetQuestionSelectionCmd()
    {
        $tableGUI = $this->buildQuestionSetFilteredStatisticTableGUI();
        $tableGUI->resetFilter();
        
        $this->testSession->getQuestionSetFilterSelection()->setTaxonomySelection(array());
        $this->testSession->getQuestionSetFilterSelection()->setAnswerStatusSelection(null);
        $this->testSession->saveToDb();
        
        $this->testSequence->resetTrackedQuestionList();
        $this->testSequence->saveToDb();
        
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION_SELECTION);
    }

    protected function previousQuestionCmd()
    {
        // nothing to do, won't be called
    }

    protected function fromPassDeletionCmd()
    {
        $this->resetCurrentQuestion();
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }
    
    protected function nextQuestionCmd()
    {
        $isWorkedThrough = assQuestion::_isWorkedThrough(
            $this->testSession->getActiveId(),
            $this->testSession->getCurrentQuestionId(),
            $this->testSession->getPass()
        );

        if (!$isWorkedThrough) {
            $this->testSequence->setQuestionPostponed($this->testSession->getCurrentQuestionId());
            $this->testSequence->saveToDb();
        }
        
        $this->resetCurrentQuestion();
        
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }
    
    protected function markQuestionCmd()
    {
        global $DIC;
        $ilUser = $DIC['ilUser'];
        $this->object->setQuestionSetSolved(1, $this->testSession->getCurrentQuestionId(), $ilUser->getId());
        
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }

    protected function unmarkQuestionCmd()
    {
        global $DIC;
        $ilUser = $DIC['ilUser'];
        $this->object->setQuestionSetSolved(0, $this->testSession->getCurrentQuestionId(), $ilUser->getId());
        
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }

    protected function editSolutionCmd()
    {
        $this->ctrl->setParameter($this, 'pmode', ilTestPlayerAbstractGUI::PRESENTATION_MODE_EDIT);
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }

    protected function submitSolutionAndNextCmd()
    {
        if ($this->object->isForceInstantFeedbackEnabled()) {
            return $this->submitSolutionCmd();
        }

        if ($this->saveQuestionSolution(true, false)) {
            $questionId = $this->testSession->getCurrentQuestionId();

            $this->getQuestionInstance($questionId)->removeIntermediateSolution(
                $this->testSession->getActiveId(),
                $this->testSession->getPass()
            );

            $this->persistQuestionAnswerStatus();

            $this->ctrl->setParameter($this, 'pmode', '');

            $this->resetCurrentQuestion();
        }

        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }
    
    protected function submitSolutionCmd()
    {
        if ($this->saveQuestionSolution(true, false)) {
            $questionId = $this->testSession->getCurrentQuestionId();

            $this->getQuestionInstance($questionId)->removeIntermediateSolution(
                $this->testSession->getActiveId(),
                $this->testSession->getPass()
            );
            
            $this->persistQuestionAnswerStatus();

            if ($this->object->isForceInstantFeedbackEnabled()) {
                $this->ctrl->setParameter($this, 'instresp', 1);

                $this->testSequence->unsetQuestionPostponed($questionId);
                $this->testSequence->setQuestionChecked($questionId);
                $this->testSequence->saveToDb();
            }

            if ($this->getNextCommandParameter()) {
                if ($this->getNextSequenceParameter()) {
                    $this->ctrl->setParameter($this, 'sequence', $this->getNextSequenceParameter());
                    $this->ctrl->setParameter($this, 'pmode', '');
                }

                $this->ctrl->redirect($this, $this->getNextCommandParameter());
            }

            $this->ctrl->setParameter($this, 'pmode', ilTestPlayerAbstractGUI::PRESENTATION_MODE_VIEW);
        } else {
            $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
        }

        // fau: testNav - remember to prevent the navigation confirmation
        $this->saveNavigationPreventConfirmation();
        // fau.

        // fau: testNav - handle navigation after saving
        if ($this->getNavigationUrlParameter()) {
            ilUtil::redirect($this->getNavigationUrlParameter());
        } else {
            $this->ctrl->saveParameter($this, 'sequence');
        }
        // fau.
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }

    protected function discardSolutionCmd()
    {
        $questionId = $this->testSession->getCurrentQuestionId();

        $currentQuestionOBJ = $this->getQuestionInstance($questionId);

        $currentQuestionOBJ->resetUsersAnswer(
            $this->testSession->getActiveId(),
            $this->testSession->getPass()
        );
        
        $this->ctrl->setParameter($this, 'pmode', ilTestPlayerAbstractGUI::PRESENTATION_MODE_VIEW);

        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }

    protected function skipQuestionCmd()
    {
        $this->nextQuestionCmd();
    }

    protected function isCheckedQuestionResettingConfirmationRequired()
    {
        if (!$this->getResetCheckedParameter()) {
            return false;
        }
        
        if ($this->testSession->getQuestionSetFilterSelection()->isAnswerStatusSelectionWrongAnswered()) {
            $this->testSequence->loadQuestions(
                $this->dynamicQuestionSetConfig,
                $this->testSession->getQuestionSetFilterSelection()
            );

            if ($this->testSequence->hasFilteredQuestionListCheckedQuestions()) {
                return true;
            }
        }

        return false;
    }
    
    protected function showQuestionCmd()
    {
        $this->updateWorkingTime();
        
        $this->testSequence->loadQuestions(
            $this->dynamicQuestionSetConfig,
            $this->testSession->getQuestionSetFilterSelection()
        );
        
        $this->testSequence->cleanupQuestions($this->testSession);
        
        if ($this->isCheckedQuestionResettingConfirmationRequired()) {
            $this->showCheckedQuestionResettingConfirmation();
            return;
        }
        
        if ($this->testSequence->getQuestionSet()->getSelectionQuestionList()->isInList($this->getQuestionIdParameter())) {
            $this->testSession->setCurrentQuestionId($this->getQuestionIdParameter());
        } else {
            $this->resetQuestionIdParameter();
        }
        
        if (!$this->testSession->getCurrentQuestionId()) {
            $upComingQuestionId = $this->testSequence->getUpcomingQuestionId();
            
            $this->testSession->setCurrentQuestionId($upComingQuestionId);
            
            // seems to be a first try of freezing answers not too hard
            /*if( $this->testSequence->isQuestionChecked($upComingQuestionId) )
            {
                $this->testSequence->setQuestionUnchecked($upComingQuestionId);
            }*/
        }

        $navigationToolbarGUI = $this->getTestNavigationToolbarGUI();
        $navigationToolbarGUI->setQuestionSelectionButtonEnabled(true);

        if ($this->testSession->getCurrentQuestionId()) {
            $questionGui = $this->getQuestionGuiInstance($this->testSession->getCurrentQuestionId());
            $this->testSequence->setCurrentQuestionId($this->testSession->getCurrentQuestionId());

            $questionGui->setQuestionCount(
                $this->testSequence->getLastPositionIndex()
            );
            $questionGui->setSequenceNumber(
                $this->testSequence->getCurrentPositionIndex($this->testSession->getCurrentQuestionId())
            );

            if (!($questionGui instanceof assQuestionGUI)) {
                $this->handleTearsAndAngerQuestionIsNull(
                    $this->testSession->getCurrentQuestionId(),
                    $this->testSession->getCurrentQuestionId()
                );
            }

            $isQuestionWorkedThrough = assQuestion::_isWorkedThrough(
                $this->testSession->getActiveId(),
                $this->testSession->getCurrentQuestionId(),
                $this->testSession->getPass()
            );

            require_once 'Modules/Test/classes/class.ilTestQuestionHeaderBlockBuilder.php';
            $headerBlockBuilder = new ilTestQuestionHeaderBlockBuilder($this->lng);
            $headerBlockBuilder->setHeaderMode(
                // avoid legacy setting combination: ctm without question titles
                $this->object->getTitleOutput() == 2 ? 1 : $this->object->getTitleOutput()
            );
            $headerBlockBuilder->setQuestionTitle($questionGui->object->getTitle());
            $headerBlockBuilder->setQuestionPoints($questionGui->object->getPoints());
            /* avoid showing Qst X of Y within CTMs
            $headerBlockBuilder->setQuestionPosition(
                $this->testSequence->getCurrentPositionIndex($this->testSession->getCurrentQuestionId())
            );
            $headerBlockBuilder->setQuestionCount($this->testSequence->getLastPositionIndex());
            */
            $headerBlockBuilder->setQuestionPostponed(
                $this->testSequence->isPostponedQuestion(
                    $this->testSession->getCurrentQuestionId()
                )
            );
            $headerBlockBuilder->setQuestionObligatory(
                $this->object->areObligationsEnabled() && ilObjTest::isQuestionObligatory($this->object->getId())
            );
            $questionGui->setQuestionHeaderBlockBuilder($headerBlockBuilder);

            // fau: testNav - always use edit mode, except for fixed answer
            if ($this->isParticipantsAnswerFixed($this->testSession->getCurrentQuestionId())) {
                $instantResponse = true;
                $presentationMode = ilTestPlayerAbstractGUI::PRESENTATION_MODE_VIEW;
            } else {
                $instantResponse = $this->getInstantResponseParameter();
                $presentationMode = ilTestPlayerAbstractGUI::PRESENTATION_MODE_EDIT;
            }
            // fau.

            $this->prepareTestPage(
                $presentationMode,
                $this->testSession->getCurrentQuestionId(),
                $this->testSession->getCurrentQuestionId()
            );
            
            $this->ctrl->setParameter($this, 'sequence', $this->testSession->getCurrentQuestionId());
            $this->ctrl->setParameter($this, 'pmode', $presentationMode);
            $formAction = $this->ctrl->getFormAction($this, ilTestPlayerCommands::SUBMIT_INTERMEDIATE_SOLUTION);
            
            switch ($presentationMode) {
                case ilTestPlayerAbstractGUI::PRESENTATION_MODE_EDIT:

// fau: testNav - enable navigation toolbar in edit mode
                    $navigationToolbarGUI->setDisabledStateEnabled(false);
// fau.
                    $this->showQuestionEditable($questionGui, $formAction, $isQuestionWorkedThrough, $instantResponse);
                    
                    break;

                case ilTestPlayerAbstractGUI::PRESENTATION_MODE_VIEW:

                    $this->showQuestionViewable($questionGui, $formAction, $isQuestionWorkedThrough, $instantResponse);
                    
                    break;

                default:

                    require_once 'Modules/Test/exceptions/class.ilTestException.php';
                    throw new ilTestException('no presentation mode given');
            }
            
            $navigationToolbarGUI->build();
            $this->populateTestNavigationToolbar($navigationToolbarGUI);

            // fau: testNav - enable the question navigation in edit mode
            $this->populateQuestionNavigation(
                $this->testSession->getCurrentQuestionId(),
                false,
                $this->object->isForceInstantFeedbackEnabled()
            );
            // fau.

            if ($instantResponse) {
                // fau: testNav - always use authorized solution for instant feedback
                $this->populateInstantResponseBlocks(
                    $questionGui,
                    true
                );
                // fau.
                $this->testSession->getQuestionSetFilterSelection()->setForcedQuestionIds(array());
            }

            // fau: testNav - add feedback modal
            if ($this->isForcedFeedbackNavUrlRegistered()) {
                $this->populateInstantResponseModal($questionGui, $this->getRegisteredForcedFeedbackNavUrl());
                $this->unregisterForcedFeedbackNavUrl();
            }
            // fau.
        } else {
            $this->prepareTestPage(ilTestPlayerAbstractGUI::PRESENTATION_MODE_VIEW, null, null);

            $navigationToolbarGUI->build();
            $this->populateTestNavigationToolbar($navigationToolbarGUI);
            
            $this->outCurrentlyFinishedPage();
        }
        
        $this->testSequence->saveToDb();
        $this->testSession->saveToDb();
    }
    
    protected function showInstantResponseCmd()
    {
        $questionId = $this->testSession->getCurrentQuestionId();
        
        $filterSelection = $this->testSession->getQuestionSetFilterSelection();

        $filterSelection->setForcedQuestionIds(array($this->testSession->getCurrentQuestionId()));

        $this->testSequence->loadQuestions($this->dynamicQuestionSetConfig, $filterSelection);
        $this->testSequence->cleanupQuestions($this->testSession);
        $this->testSequence->saveToDb();

        if (!$this->isParticipantsAnswerFixed($questionId)) {
            if ($this->saveQuestionSolution(true)) {
                $this->removeIntermediateSolution();
                $this->persistQuestionAnswerStatus();
                $this->setAnswerChangedParameter(false);
            } else {
                $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
            }
            $this->testSequence->unsetQuestionPostponed($questionId);
            $this->testSequence->setQuestionChecked($questionId);
            $this->testSequence->saveToDb();
        }

        $this->ctrl->setParameter(
            $this,
            'sequence',
            $this->testSession->getCurrentQuestionId()
        );

        $this->ctrl->setParameter($this, 'instresp', 1);
        
        // fau: testNav - handle navigation after feedback
        if ($this->getNavigationUrlParameter()) {
            $this->saveNavigationPreventConfirmation();
            $this->registerForcedFeedbackNavUrl($this->getNavigationUrlParameter());
        }
        // fau.
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }
    
    protected function handleQuestionActionCmd()
    {
        $questionId = $this->testSession->getCurrentQuestionId();

        if ($questionId && !$this->isParticipantsAnswerFixed($questionId)) {
            $this->saveQuestionSolution(false);
            // fau: testNav - add changed status of the question
            $this->setAnswerChangedParameter(true);
            // fau.
        }

        $this->ctrl->setParameter(
            $this,
            'sequence',
            $this->testSession->getCurrentQuestionId()
        );

        $this->ctrl->saveParameter($this, 'pmode');
        
        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }

    private function outCurrentlyFinishedPage()
    {
        if ($this->testSequence->openQuestionExists()) {
            $message = $this->lng->txt('tst_dyn_test_msg_currently_finished_selection');
        } else {
            $message = $this->lng->txt('tst_dyn_test_msg_currently_finished_completely');
            $message .= "<br /><br />{$this->buildFinishPagePassDeletionLink()}";
        }
        
        $msgHtml = $this->tpl->getMessageHTML($message);
        
        $tpl = new ilTemplate('tpl.test_currently_finished_msg.html', true, true, 'Modules/Test');
        $tpl->setVariable('TEST_CURRENTLY_FINISHED_MSG', $msgHtml);
        
        $this->tpl->setVariable('QUESTION_OUTPUT', $tpl->get());
    }
    
    protected function isFirstQuestionInSequence($sequenceElement)
    {
        return !$this->testSequence->trackedQuestionExists();
    }

    protected function isLastQuestionInSequence($sequenceElement)
    {
        return false; // always
    }
    
    protected function canSaveResult()
    {
        return !$this->object->endingTimeReached();
    }
     
    public function saveQuestionSolution($authorized = true, $force = false)
    {
        // what is this formtimestamp ??
        if (!$force) {
            $formtimestamp = $_POST["formtimestamp"];
            if (strlen($formtimestamp) == 0) {
                $formtimestamp = $_GET["formtimestamp"];
            }
            if ($formtimestamp != $_SESSION["formtimestamp"]) {
                $_SESSION["formtimestamp"] = $formtimestamp;
            } else {
                return false;
            }
        }
        
        // determine current question
        
        $qId = $this->testSession->getCurrentQuestionId();
        
        if (!$qId || $qId != $_GET["sequence"]) {
            return false;
        }
        
        // save question solution
        
        $this->saveResult = false;

        if ($this->canSaveResult($qId) || $force) {
            $questionGUI = $this->object->createQuestionGUI("", $qId);
                
            if ($this->object->getJavaScriptOutput()) {
                $questionGUI->object->setOutputType(OUTPUT_JAVASCRIPT);
            }
                
            $activeId = $this->testSession->getActiveId();
                
            $this->saveResult = $questionGUI->object->persistWorkingState(
                $activeId,
                $pass = null,
                $this->object->areObligationsEnabled(),
                $authorized
            );
            
            if ($authorized && $this->object->isSkillServiceToBeConsidered()) {
                $this->handleSkillTriggering($this->testSession);
            }
        }
        
        if ($this->saveResult == false) {
            $this->ctrl->setParameter($this, "save_error", "1");
            $_SESSION["previouspost"] = $_POST;
        }
        
        return $this->saveResult;
    }
    
    private function isQuestionAnsweredCorrect($questionId, $activeId, $pass)
    {
        $questionGUI = $this->object->createQuestionGUI("", $questionId);

        $reachedPoints = assQuestion::_getReachedPoints($activeId, $questionId, $pass);
        $maxPoints = $questionGUI->object->getMaximumPoints();
        
        if ($reachedPoints < $maxPoints) {
            return false;
        }
        
        return true;
    }
    
    protected function buildQuestionsTableDataArray($questions, $marked_questions)
    {
        $data = array();
        
        foreach ($questions as $key => $value) {
            $this->ctrl->setParameter($this, 'sequence', $value['question_id']);
            $href = $this->ctrl->getLinkTarget($this, 'gotoQuestion');
            $this->ctrl->setParameter($this, 'sequence', '');
            
            $description = "";
            if ($this->object->getListOfQuestionsDescription()) {
                $description = $value["description"];
            }
            
            $marked = false;
            if (count($marked_questions)) {
                if (isset($marked_questions[$value["question_id"]])) {
                    if ($marked_questions[$value["question_id"]]["solved"] == 1) {
                        $marked = true;
                    }
                }
            }
            
            array_push($data, array(
                'href' => $href,
                'title' => $this->object->getQuestionTitle($value["title"]),
                'description' => $description,
                'worked_through' => $this->testSequence->isAnsweredQuestion($value["question_id"]),
                'postponed' => $this->testSequence->isPostponedQuestion($value["question_id"]),
                'marked' => $marked
            ));
        }
        
        return $data;
    }

    protected function buildQuestionSetAnswerStatisticRowArray($questions, $trackedQuestions)
    {
        $questionAnswerStats = array(
            'total_all' => count($questions),
            'total_open' => 0,
            'non_answered_notseen' => 0,
            'non_answered_skipped' => 0,
            'wrong_answered' => 0,
            'correct_answered' => 0
        );

        foreach ($questions as $key => $value) {
            switch ($value['question_answer_status']) {
                case ilAssQuestionList::QUESTION_ANSWER_STATUS_NON_ANSWERED:
                    if (isset($trackedQuestions[$key])) {
                        $questionAnswerStats['non_answered_skipped']++;
                    } else {
                        $questionAnswerStats['non_answered_notseen']++;
                    }
                    $questionAnswerStats['total_open']++;
                    break;
                case ilAssQuestionList::QUESTION_ANSWER_STATUS_WRONG_ANSWERED:
                    $questionAnswerStats['wrong_answered']++;
                    $questionAnswerStats['total_open']++;
                    break;
                case ilAssQuestionList::QUESTION_ANSWER_STATUS_CORRECT_ANSWERED:
                    $questionAnswerStats['correct_answered']++;
                    break;
            }
        }

        return $questionAnswerStats;
    }

    private function buildQuestionSetCompleteStatisticTableGUI()
    {
        require_once 'Modules/Test/classes/tables/class.ilTestDynamicQuestionSetStatisticTableGUI.php';
        $gui = $this->buildQuestionSetStatisticTableGUI(
            ilTestDynamicQuestionSetStatisticTableGUI::COMPLETE_TABLE_ID
        );

        $gui->initTitle('tst_dynamic_question_set_complete');
        $gui->initColumns('tst_num_all_questions');

        return $gui;
    }
    
    private function buildQuestionSetFilteredStatisticTableGUI()
    {
        require_once 'Modules/Test/classes/tables/class.ilTestDynamicQuestionSetStatisticTableGUI.php';
        $gui = $this->buildQuestionSetStatisticTableGUI(
            ilTestDynamicQuestionSetStatisticTableGUI::FILTERED_TABLE_ID
        );

        $gui->initTitle('tst_dynamic_question_set_selection');
        $gui->initColumns('tst_num_selected_questions');

        require_once 'Services/Taxonomy/classes/class.ilObjTaxonomy.php';
        $gui->setTaxIds(ilObjTaxonomy::getUsageOfObject(
            $this->dynamicQuestionSetConfig->getSourceQuestionPoolId()
        ));

        $gui->setTaxonomyFilterEnabled($this->dynamicQuestionSetConfig->isTaxonomyFilterEnabled());
        $gui->setAnswerStatusFilterEnabled($this->dynamicQuestionSetConfig->isAnswerStatusFilterEnabled());

        $gui->setFilterSelection($this->testSession->getQuestionSetFilterSelection());
        $gui->initFilter();
        $gui->setFilterCommand('filterQuestionSelection');
        $gui->setResetCommand('resetQuestionSelection');
        
        return $gui;
    }
        
    private function buildQuestionSetStatisticTableGUI($tableId)
    {
        require_once 'Modules/Test/classes/tables/class.ilTestDynamicQuestionSetStatisticTableGUI.php';
        $gui = new ilTestDynamicQuestionSetStatisticTableGUI(
            $this->ctrl,
            $this->lng,
            $this,
            ilTestPlayerCommands::SHOW_QUESTION_SELECTION,
            $tableId
        );

        return $gui;
    }
    
    private function getEnterTestButtonLangVar()
    {
        if ($this->testSequence->trackedQuestionExists()) {
            return 'tst_resume_dyn_test_with_cur_quest_sel';
        }
        
        return 'tst_start_dyn_test_with_cur_quest_sel';
    }

    protected function persistQuestionAnswerStatus()
    {
        $questionId = $this->testSession->getCurrentQuestionId();
        $activeId = $this->testSession->getActiveId();
        $pass = $this->testSession->getPass();

        if ($this->isQuestionAnsweredCorrect($questionId, $activeId, $pass)) {
            $this->testSequence->setQuestionAnsweredCorrect($questionId);
        } else {
            $this->testSequence->setQuestionAnsweredWrong($questionId);
        }

        $this->testSequence->saveToDb();
    }

    private function resetCurrentQuestion()
    {
        $this->testSession->setCurrentQuestionId(null);
        $this->testSession->saveToDb();

        $this->ctrl->setParameter($this, 'sequence', $this->testSession->getCurrentQuestionId());
        $this->ctrl->setParameter($this, 'pmode', '');
    }

    private function buildFinishPagePassDeletionLink()
    {
        $href = $this->getPassDeletionTarget();

        $label = $this->lng->txt('tst_dyn_test_msg_pass_deletion_link');

        return "<a href=\"{$href}\">{$label}</a>";
    }

    private function getPassDeletionTarget()
    {
        require_once 'Modules/Test/classes/confirmations/class.ilTestPassDeletionConfirmationGUI.php';
        
        $this->ctrl->setParameterByClass('ilTestEvaluationGUI', 'context', ilTestPassDeletionConfirmationGUI::CONTEXT_DYN_TEST_PLAYER);
        $this->ctrl->setParameterByClass('ilTestEvaluationGUI', 'active_id', $this->testSession->getActiveId());
        $this->ctrl->setParameterByClass('ilTestEvaluationGUI', 'pass', $this->testSession->getPass());

        return $this->ctrl->getLinkTargetByClass('ilTestEvaluationGUI', 'confirmDeletePass');
    }
    
    protected function resetQuestionIdParameter()
    {
        $this->resetSequenceElementParameter();
    }
    
    protected function getQuestionIdParameter()
    {
        return $this->getSequenceElementParameter();
    }
    
    protected function getResetCheckedParameter()
    {
        if (isset($_GET['reset_checked'])) {
            return $_GET['reset_checked'];
        }

        return null;
    }

    public function outQuestionSummaryCmd($fullpage = true, $contextFinishTest = false, $obligationsNotAnswered = false, $obligationsFilter = false)
    {
        $this->testSequence->loadQuestions(
            $this->dynamicQuestionSetConfig,
            $this->testSession->getQuestionSetFilterSelection()
        );

        $this->testSequence->setCurrentQuestionId($this->testSession->getCurrentQuestionId());
        
        parent::outQuestionSummaryCmd($fullpage, $contextFinishTest, $obligationsNotAnswered, $obligationsFilter);
    }
    
    protected function showCheckedQuestionResettingConfirmation()
    {
        require_once 'Services/Utilities/classes/class.ilConfirmationGUI.php';
        $confirmation = new ilConfirmationGUI();
        $confirmation->setFormAction($this->ctrl->getFormAction($this));
        $confirmation->setHeaderText($this->lng->txt('tst_dyn_unfreeze_answers_confirmation'));
        $confirmation->setConfirm($this->lng->txt('tst_dyn_unfreeze_answers'), ilTestPlayerCommands::UNFREEZE_ANSWERS);
        $confirmation->setCancel($this->lng->txt('tst_dyn_keep_answ_freeze'), ilTestPlayerCommands::SHOW_QUESTION);

        $this->populateMessageContent($confirmation->getHtml());
    }
    
    protected function unfreezeCheckedQuestionsAnswersCmd()
    {
        $this->testSequence->loadQuestions(
            $this->dynamicQuestionSetConfig,
            $this->testSession->getQuestionSetFilterSelection()
        );

        $this->testSequence->resetFilteredQuestionListsCheckedStatus();
        $this->testSequence->saveToDb();

        $this->ctrl->redirect($this, ilTestPlayerCommands::SHOW_QUESTION);
    }

    protected function populateQuestionNavigation($sequenceElement, $disabled, $primaryNext)
    {
        if (!$this->isLastQuestionInSequence($sequenceElement)) {
            $this->populateNextButtons($disabled, $primaryNext);
        }
    }
    
    protected function getStartTestFromQuestionSelectionLink()
    {
        $this->ctrl->setParameter($this, 'reset_checked', 1);
        $link = $this->ctrl->getLinkTarget($this, ilTestPlayerCommands::SHOW_QUESTION);
        $this->ctrl->setParameter($this, 'reset_checked', '');

        return $link;
    }

    protected function isShowingPostponeStatusReguired($questionId)
    {
        return false;
    }

    protected function buildTestPassQuestionList()
    {
        global $DIC;
        $ilPluginAdmin = $DIC['ilPluginAdmin'];

        require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionList.php';
        $questionList = new ilAssQuestionList($this->db, $this->lng, $ilPluginAdmin);
        $questionList->setParentObjId($this->dynamicQuestionSetConfig->getSourceQuestionPoolId());
        $questionList->setQuestionInstanceTypeFilter(ilAssQuestionList::QUESTION_INSTANCE_TYPE_ORIGINALS);

        return $questionList;
    }

    protected function isQuestionSummaryFinishTestButtonRequired()
    {
        return false;
    }
    
    protected function isOptionalQuestionAnsweringConfirmationRequired($sequenceKey)
    {
        return false;
    }
}