class.ilForumPageCommandForwarder.php

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<?php

declare(strict_types=1);

use ILIAS\HTTP\GlobalHttpState;
use ILIAS\Style\Content\Object\ObjectFacade;

class ilForumPageCommandForwarder implements ilForumObjectConstants
{
    public const PRESENTATION_MODE_EDITING = 'PRESENTATION_MODE_EDITING';

    public const PRESENTATION_MODE_PRESENTATION = 'PRESENTATION_MODE_PRESENTATION';

    public const PRESENTATION_MODE_EMBEDDED_PRESENTATION = 'PRESENTATION_MODE_EMBEDDED_PRESENTATION';
    public const DEFAULT_LANGUAGE = '-';

    protected string $presentationMode = self::PRESENTATION_MODE_EDITING;
    protected ilCtrlInterface $ctrl;
    protected ilLanguage $lng;
    protected ilTabsGUI $tabs;
    protected ilObjForum $parentObject;
    protected string $backUrl = '';
    protected ilObjUser $actor;
    protected GlobalHttpState $http;
    protected ObjectFacade $content_style_domain;

    public function __construct(
        GlobalHttpState $http,
        ilCtrlInterface $ctrl,
        ilTabsGUI $tabs,
        ilLanguage $lng,
        ilObjForum $parentObject,
        ilObjUser $actor,
        ObjectFacade $content_style_domain
    ) {
        $this->http = $http;
        $this->ctrl = $ctrl;
        $this->tabs = $tabs;
        $this->lng = $lng;
        $this->parentObject = $parentObject;
        $this->actor = $actor;
        $this->content_style_domain = $content_style_domain;

        $this->lng->loadLanguageModule('content');

        $this->backUrl = '';
        if (isset($this->http->request()->getQueryParams()['backurl'])) {
            $this->backUrl = $this->http->request()->getQueryParams()['backurl'];
        }

        if ($this->backUrl !== '') {
            $this->ctrl->setParameterByClass(ilForumPageGUI::class, 'backurl', rawurlencode($this->backUrl));
        }
    }

    public function onPageUpdate(array $parameters): void
    {
    }

    public function updateForumOnPageUpdate(array $parameters): void
    {
        $this->parentObject->update();
    }

    protected function getPageObjectGUI(string $language, bool $isEmbedded = false): ilForumPageGUI
    {
        $pageObjectGUI = new ilForumPageGUI($this->parentObject->getId(), 0, $isEmbedded, $language);
        $pageObjectGUI->setStyleId(
            $this->content_style_domain->getEffectiveStyleId()
        );

        $pageObjectGUI->obj->addUpdateListener($this, 'updateForumOnPageUpdate', []);

        return $pageObjectGUI;
    }

    protected function doesPageExistsForLanguage(string $language): bool
    {
        return ilForumPage::_exists($this->parentObject->getType(), $this->parentObject->getId(), $language);
    }

    protected function ensurePageObjectExists(string $language): void
    {
        if (!$this->doesPageExistsForLanguage($language)) {
            $pageObject = new ilForumPage();
            $pageObject->setParentId($this->parentObject->getId());
            $pageObject->setId($this->parentObject->getId());
            $pageObject->setLanguage($language);
            $pageObject->createFromXML();
        }
    }

    protected function setBackLinkTab(): void
    {
        $backUrl = $this->ctrl->getLinkTargetByClass(ilObjForumGUI::class, 'showThreads');
        if ($this->backUrl !== '') {
            $backUrlParts = parse_url(ilUtil::stripSlashes($this->backUrl));

            $script = basename($backUrlParts['path']);

            $backUrl = './' . implode('?', [
                $script, $backUrlParts['query']
            ]);
        }

        $this->tabs->setBackTarget($this->lng->txt('back'), $backUrl);
    }

    protected function buildEditingPageObjectGUI(string $language): ilForumPageGUI
    {
        $this->tabs->clearTargets();

        $this->setBackLinkTab();

        $this->ensurePageObjectExists($language);

        $pageObjectGUI = $this->getPageObjectGUI($language);
        $pageObjectGUI->setEnabledTabs(true);

        $page = $pageObjectGUI->getPageObject();
        $page->addUpdateListener($this, 'onPageUpdate', ['page' => $page]);

        return $pageObjectGUI;
    }

    protected function buildPresentationPageObjectGUI(string $language): ilForumPageGUI
    {
        $this->ensurePageObjectExists($language);

        $pageObjectGUI = $this->getPageObjectGUI($language);
        $pageObjectGUI->setEnabledTabs(false);
        $pageObjectGUI->setStyleId(
            $this->content_style_domain->getEffectiveStyleId()
        );

        return $pageObjectGUI;
    }

    protected function buildEmbeddedPresentationPageObjectGUI(string $language): ilForumPageGUI
    {
        $this->ensurePageObjectExists($language);

        $pageObjectGUI = $this->getPageObjectGUI($language, true);
        $pageObjectGUI->setEnabledTabs(false);
        $pageObjectGUI->setStyleId(
            $this->content_style_domain->getEffectiveStyleId()
        );

        return $pageObjectGUI;
    }

    public function setPresentationMode(string $presentationMode): void
    {
        $this->presentationMode = $presentationMode;
    }

    public function forward(string $ctrlLink = ''): string
    {
        switch ($this->presentationMode) {
            case self::PRESENTATION_MODE_EDITING:

                $pageObjectGui = $this->buildEditingPageObjectGUI(self::DEFAULT_LANGUAGE);
                return (string) $this->ctrl->forwardCommand($pageObjectGui);

            case self::PRESENTATION_MODE_PRESENTATION:
                $pageObjectGUI = $this->buildPresentationPageObjectGUI(self::DEFAULT_LANGUAGE);

                if (is_string($ctrlLink) && $ctrlLink !== '') {
                    $pageObjectGUI->setFileDownloadLink($ctrlLink . '&cmd=' . self::UI_CMD_COPAGE_DOWNLOAD_FILE);
                    $pageObjectGUI->setFullscreenLink($ctrlLink . '&cmd=' . self::UI_CMD_COPAGE_DISPLAY_FULLSCREEN);
                    $pageObjectGUI->setSourcecodeDownloadScript($ctrlLink . '&cmd=' . self::UI_CMD_COPAGE_DOWNLOAD_PARAGRAPH);
                }

                return $this->ctrl->getHTML($pageObjectGUI);

            case self::PRESENTATION_MODE_EMBEDDED_PRESENTATION:
                $pageObjectGUI = $this->buildEmbeddedPresentationPageObjectGUI(self::DEFAULT_LANGUAGE);

                if (is_string($ctrlLink) && $ctrlLink !== '') {
                    $pageObjectGUI->setFileDownloadLink($ctrlLink . '&cmd=' . self::UI_CMD_COPAGE_DOWNLOAD_FILE);
                    $pageObjectGUI->setFullscreenLink($ctrlLink . '&cmd=' . self::UI_CMD_COPAGE_DISPLAY_FULLSCREEN);
                    $pageObjectGUI->setSourcecodeDownloadScript($ctrlLink . '&cmd=' . self::UI_CMD_COPAGE_DOWNLOAD_PARAGRAPH);
                }

                return $pageObjectGUI->getHTML();

            default:
                throw new ilException('Unknown presentation mode given');
        }
    }
}