/**
* 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;
}
