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- <?php
- /**
- * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
- namespace OCA\Theming\Service;
- use OCA\Theming\ITheme;
- use OCA\Theming\Themes\DefaultTheme;
- use OCA\Theming\Util;
- use OCP\IConfig;
- use OCP\IURLGenerator;
- use OCP\IUserSession;
- class ThemeInjectionService {
- private IURLGenerator $urlGenerator;
- private ThemesService $themesService;
- private DefaultTheme $defaultTheme;
- private Util $util;
- private IConfig $config;
- private ?string $userId;
- public function __construct(IURLGenerator $urlGenerator,
- ThemesService $themesService,
- DefaultTheme $defaultTheme,
- Util $util,
- IConfig $config,
- IUserSession $userSession) {
- $this->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 <link> 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)),
- ]);
- }
- }
- }
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