/**
* Builds NavigationItem's from given root pages.
*
* @param PageModel[] $rootPages
*
* @return NavigationItem[]
*
* @throws \RuntimeException if multiple root pages have the same language
*/
private function createNavigationItemsForRootPages(array $rootPages)
{
$navigationItems = [];
foreach ($rootPages as $rootPage) {
if (!$this->isPagePublished($rootPage)) {
continue;
}
$language = strtolower($rootPage->language);
if (array_key_exists($language, $navigationItems)) {
throw new \RuntimeException(sprintf('Multiple root pages for the language "%s" found', $rootPage->language));
}
$navigationItems[$language] = new NavigationItem($rootPage, $this->languageText->get($language));
}
return $navigationItems;
}
/**
* @inheritdoc
*/
protected function compile()
{
$currentPage = $this->getCurrentPage();
$pageFinder = new PageFinder();
if ($this->customLanguage) {
$languageText = LanguageText::createFromOptionWizard($this->customLanguageText);
} else {
$languageText = new LanguageText();
}
$navigationFactory = new NavigationFactory($pageFinder, $languageText, $currentPage);
$navigationItems = $navigationFactory->findNavigationItems($currentPage);
// Do not generate module or header if there is none or only one link
if (count($navigationItems) < 2) {
return;
}
$templateItems = [];
$headerLinks = new AlternateLinks();
$queryParameters = $currentPage->languageQuery ? trimsplit(',', $currentPage->languageQuery) : [];
$defaultUrlParameters = $this->createUrlParameterBag($queryParameters);
foreach ($navigationItems as $item) {
$urlParameters = clone $defaultUrlParameters;
if (false === $this->executeHook($item, $urlParameters) || $this->hideNoFallback && !$item->isDirectFallback()) {
continue;
}
if ($item->isDirectFallback()) {
$headerLinks->addFromNavigationItem($item, $urlParameters);
}
// Remove active language from navigation but not from header links!
if ($this->hideActiveLanguage && $item->isCurrentPage()) {
continue;
}
$templateItems[] = $this->generateTemplateArray($item, $urlParameters);
}
$this->Template->items = $this->generateNavigationTemplate($templateItems);
$GLOBALS['TL_HEAD'][] = $headerLinks->generate();
}