urlGenerator = $urlGenerator; $this->themesService = $themesService; $this->defaultTheme = $defaultTheme; $this->util = $util; $this->config = $config; if ($userSession->getUser() !== null) { $this->userId = $userSession->getUser()->getUID(); } else { $this->userId = null; } } public function injectHeaders(): void { $themes = $this->themesService->getThemes(); $defaultTheme = $themes[$this->defaultTheme->getId()]; $mediaThemes = array_filter($themes, function ($theme) { // Check if the theme provides a media query return (bool)$theme->getMediaQuery(); }); // Default theme fallback $this->addThemeHeaders($defaultTheme); // Themes applied by media queries foreach ($mediaThemes as $theme) { $this->addThemeHeaders($theme, true, $theme->getMediaQuery()); } // Themes foreach ($this->themesService->getThemes() as $theme) { // Ignore default theme as already processed first if ($theme->getId() === $this->defaultTheme->getId()) { continue; } $this->addThemeHeaders($theme, false); } // Meta headers $this->addThemeMetaHeaders($themes); } /** * Inject theme header into rendered page * * @param ITheme $theme the theme * @param bool $plain request the :root syntax * @param string $media media query to use in the element */ private function addThemeHeaders(ITheme $theme, bool $plain = true, ?string $media = null): void { $linkToCSS = $this->urlGenerator->linkToRoute('theming.Theming.getThemeStylesheet', [ 'themeId' => $theme->getId(), 'plain' => $plain, 'v' => $this->util->getCacheBuster(), ]); \OCP\Util::addHeader('link', [ 'rel' => 'stylesheet', 'media' => $media, 'href' => $linkToCSS, 'class' => 'theme' ]); } /** * Inject meta headers into rendered page * * @param ITheme[] $themes the theme */ private function addThemeMetaHeaders(array $themes): void { $metaHeaders = []; // Meta headers foreach ($this->themesService->getThemes() as $theme) { if (!empty($theme->getMeta())) { foreach ($theme->getMeta() as $meta) { if (!isset($meta['name']) || !isset($meta['content'])) { continue; } if (!isset($metaHeaders[$meta['name']])) { $metaHeaders[$meta['name']] = []; } $metaHeaders[$meta['name']][] = $meta['content']; } } } foreach ($metaHeaders as $name => $content) { \OCP\Util::addHeader('meta', [ 'name' => $name, 'content' => join(' ', array_unique($content)), ]); } } }