/**
* Translate URL parameters for articles.
*
* @param ChangelanguageNavigationEvent $event
*/
public function onChangelanguageNavigation(ChangelanguageNavigationEvent $event)
{
// Try to find matching article
if ($event->getNavigationItem()->isCurrentPage() || !$event->getUrlParameterBag()->hasUrlAttribute('articles')) {
return;
}
/** @var PageModel $objPage */
global $objPage;
$parameterBag = $event->getUrlParameterBag();
$currentArticle = ArticleModel::findByIdOrAliasAndPid($parameterBag->getUrlAttribute('articles'), $objPage->id);
if (null === $currentArticle) {
return;
}
$pageFinder = new PageFinder();
$targetRoot = $event->getNavigationItem()->getRootPage();
$masterRoot = $pageFinder->findMasterRootForPage($targetRoot);
$targetArticle = $this->findTargetArticle($currentArticle, $targetRoot->id, $objPage->rootId === $masterRoot->id, null !== $masterRoot && $targetRoot->id === $masterRoot->id);
if (null === $targetArticle) {
$parameterBag->removeUrlAttribute('articles');
} else {
$parameterBag->setUrlAttribute('articles', $targetArticle->alias);
}
}
/**
* Limits the available pages in page picker to the fallback page tree.
*
* @param int $pageId
*/
private function setRootNodesForPage($pageId)
{
$page = PageModel::findWithDetails($pageId);
$root = PageModel::findByPk($page->rootId);
if ($root->fallback && (!$root->languageRoot || ($languageRoot = PageModel::findByPk($root->languageRoot)) === null)) {
return;
}
$pageFinder = new PageFinder();
$masterRoot = $pageFinder->findMasterRootForPage($page);
if (null !== $masterRoot) {
$GLOBALS['TL_DCA']['tl_page']['fields']['languageMain']['eval']['rootNodes'] = Database::getInstance()->prepare('SELECT id FROM tl_page WHERE pid=?')->execute($masterRoot->id)->fetchEach('id');
}
}
private function validateLanguageMainForPage($pageId)
{
$page = PageModel::findWithDetails($pageId);
// Moving a root page does not affect language assignments
if (null === $page || !$page->languageMain || 'root' === $page->type) {
return;
}
$duplicates = PageModel::countBy(['id IN (' . implode(',', Database::getInstance()->getChildRecords($page->rootId, 'tl_page')) . ')', 'languageMain=?', 'id!=?'], [$page->languageMain, $page->id]);
// Reset languageMain if another page in the new page tree has the same languageMain
if ($duplicates > 0) {
$this->resetPageAndChildren($page->id);
return;
}
$pageFinder = new PageFinder();
$masterRoot = $pageFinder->findMasterRootForPage($page);
// Reset languageMain if current tree has no master or if it's the master tree
if (null === $masterRoot || $masterRoot->id === $page->rootId) {
$this->resetPageAndChildren($page->id);
return;
}
// Reset languageMain if the current value is not a valid ID of the master tree
if (!in_array($page->id, Database::getInstance()->getChildRecords($masterRoot->id, 'tl_page'), false)) {
$this->resetPageAndChildren($page->id);
}
}
