class.ilAssQuestionHintPageObjectCommandForwarder.php

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

require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionAbstractPageObjectCommandForwarder.php';
require_once 'Modules/TestQuestionPool/classes/class.ilAssQuestionHintsGUI.php';

class ilAssQuestionHintPageObjectCommandForwarder extends ilAssQuestionAbstractPageObjectCommandForwarder
{
    const PRESENTATION_MODE_AUTHOR = 'PRESENTATION_MODE_AUTHOR';
    
    const PRESENTATION_MODE_PREVIEW = 'PRESENTATION_MODE_PREVIEW';
    
    const PRESENTATION_MODE_REQUEST = 'PRESENTATION_MODE_REQUEST';
    
    protected $presentationMode = null;
    
    protected $questionHint = null;
    
    public function __construct(assQuestion $questionOBJ, ilCtrl $ctrl, ilTabsGUI $tabs, ilLanguage $lng)
    {
        parent::__construct($questionOBJ, $ctrl, $tabs, $lng);
        
        $this->questionHint = new ilAssQuestionHint();

        if (!isset($_GET['hint_id']) || !(int) $_GET['hint_id'] || !$this->questionHint->load((int) $_GET['hint_id'])) {
            ilUtil::sendFailure('invalid hint id given: ' . (int) $_GET['hint_id'], true);
            $this->ctrl->redirectByClass('ilAssQuestionHintsGUI', ilAssQuestionHintsGUI::CMD_SHOW_LIST);
        }
    }
    
    public function forward()
    {
        switch ($this->getPresentationMode()) {
            case self::PRESENTATION_MODE_AUTHOR:
                
                $pageObjectGUI = $this->buildAuthorPresentationPageObjectGUI();
                break;
            
            case self::PRESENTATION_MODE_PREVIEW:
                
                $pageObjectGUI = $this->buildPreviewPresentationPageObjectGUI();
                break;
            
            case self::PRESENTATION_MODE_REQUEST:
                
                $pageObjectGUI = $this->buildRequestPresentationPageObjectGUI();
                break;
        }

        $this->ctrl->setParameter($pageObjectGUI, 'hint_id', $this->questionHint->getId());
        
        $this->ctrl->forwardCommand($pageObjectGUI);
    }
    
    private function buildPreviewPresentationPageObjectGUI()
    {
        $this->tabs->setBackTarget(
            $this->lng->txt('tst_question_hints_back_to_hint_list'),
            $this->ctrl->getLinkTargetByClass('ilAssQuestionHintsGUI', ilAssQuestionHintsGUI::CMD_SHOW_LIST)
        );
        
        $pageObjectGUI = $this->getPageObjectGUI(
            $this->questionHint->getPageObjectType(),
            $this->questionHint->getId()
        );
        
        $pageObjectGUI->setEnabledTabs(false);
        
        $pageObjectGUI->setPresentationTitle(
            ilAssQuestionHint::getHintIndexLabel($this->lng, $this->questionHint->getIndex())
        );
        
        return $pageObjectGUI;
    }

    private function buildRequestPresentationPageObjectGUI()
    {
        $this->tabs->setBackTarget(
            $this->lng->txt('tst_question_hints_back_to_hint_list'),
            $this->ctrl->getLinkTargetByClass('ilAssQuestionHintRequestGUI', ilAssQuestionHintRequestGUI::CMD_SHOW_LIST)
        );
        
        $pageObjectGUI = $this->getPageObjectGUI(
            $this->questionHint->getPageObjectType(),
            $this->questionHint->getId()
        );
        
        $pageObjectGUI->setEnabledTabs(false);
        
        $pageObjectGUI->setPresentationTitle(
            ilAssQuestionHint::getHintIndexLabel($this->lng, $this->questionHint->getIndex())
        );
        
        return $pageObjectGUI;
    }
    
    private function buildAuthorPresentationPageObjectGUI()
    {
        $this->tabs->setBackTarget(
            $this->lng->txt('tst_question_hints_back_to_hint_list'),
            $this->ctrl->getLinkTargetByClass('ilAssQuestionHintsGUI', ilAssQuestionHintsGUI::CMD_SHOW_LIST)
        );
        
        $this->ensurePageObjectExists(
            $this->questionHint->getPageObjectType(),
            $this->questionHint->getId()
        );
        
        $pageObjectGUI = $this->getPageObjectGUI(
            $this->questionHint->getPageObjectType(),
            $this->questionHint->getId()
        );
        
        $pageObjectGUI->setEnabledTabs(true);
        
        return $pageObjectGUI;
    }
    
    public function getPresentationMode()
    {
        return $this->presentationMode;
    }
    
    public function setPresentationMode($presentationMode)
    {
        switch ($presentationMode) {
            case self::PRESENTATION_MODE_AUTHOR:
            case self::PRESENTATION_MODE_PREVIEW:
            case self::PRESENTATION_MODE_REQUEST:
                
                $this->presentationMode = $presentationMode;
                break;
            
            default: throw new ilTestQuestionPoolException('invalid presentation mode given: ' . $presentationMode);
        }
    }
    
    protected function getPageObjectGUI($pageObjectType, $pageObjectId)
    {
        include_once("./Modules/TestQuestionPool/classes/class.ilAssHintPageGUI.php");
        $pageObjectGUI = new ilAssHintPageGUI($pageObjectId);
        $pageObjectGUI->obj->addUpdateListener(
            $this->questionOBJ,
            'updateTimestamp'
        );
        return $pageObjectGUI;
    }
    
    protected function ensurePageObjectExists($pageObjectType, $pageObjectId)
    {
        include_once("./Modules/TestQuestionPool/classes/class.ilAssHintPage.php");
        if (!ilAssHintPage::_exists($pageObjectType, $pageObjectId)) {
            $pageObject = new ilAssHintPage();
            $pageObject->setParentId($this->questionOBJ->getId());
            $pageObject->setId($pageObjectId);
            $pageObject->createFromXML();
        }
    }
}