1 files changed, 56 insertions, 44 deletions

diff --git a/apps/theming/lib/Service/ThemeInjectionService.php b/apps/theming/lib/Service/ThemeInjectionService.php
index c7560bdf8f8..873d388081c 100644
--- a/apps/theming/lib/Service/ThemeInjectionService.php
+++ b/apps/theming/lib/Service/ThemeInjectionService.php
@@ -1,27 +1,12 @@
 <?php
+
 /**
- * @copyright Copyright (c) 2022 John Molakvoæ <skjnldsv@protonmail.com>
- *
- * @author John Molakvoæ <skjnldsv@protonmail.com>
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
+ * 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;
@@ -30,24 +15,16 @@ 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;
+	public function __construct(
+		private IURLGenerator $urlGenerator,
+		private ThemesService $themesService,
+		private DefaultTheme $defaultTheme,
+		private Util $util,
+		private IConfig $config,
+		IUserSession $userSession,
+	) {
 		if ($userSession->getUser() !== null) {
 			$this->userId = $userSession->getUser()->getUID();
 		} else {
@@ -55,7 +32,7 @@ class ThemeInjectionService {
 		}
 	}
 
-	public function injectHeaders() {
+	public function injectHeaders(): void {
 		$themes = $this->themesService->getThemes();
 		$defaultTheme = $themes[$this->defaultTheme->getId()];
 		$mediaThemes = array_filter($themes, function ($theme) {
@@ -64,33 +41,36 @@ class ThemeInjectionService {
 		});
 
 		// Default theme fallback
-		$this->addThemeHeader($defaultTheme->getId());
+		$this->addThemeHeaders($defaultTheme);
 
 		// Themes applied by media queries
-		foreach($mediaThemes as $theme) {
-			$this->addThemeHeader($theme->getId(), true, $theme->getMediaQuery());
+		foreach ($mediaThemes as $theme) {
+			$this->addThemeHeaders($theme, true, $theme->getMediaQuery());
 		}
 
 		// Themes
-		foreach($this->themesService->getThemes() as $theme) {
+		foreach ($this->themesService->getThemes() as $theme) {
 			// Ignore default theme as already processed first
 			if ($theme->getId() === $this->defaultTheme->getId()) {
 				continue;
 			}
-			$this->addThemeHeader($theme->getId(), false);
+			$this->addThemeHeaders($theme, false);
 		}
+
+		// Meta headers
+		$this->addThemeMetaHeaders($themes);
 	}
 
 	/**
 	 * Inject theme header into rendered page
 	 *
-	 * @param string $themeId the theme ID
+	 * @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 addThemeHeader(string $themeId, bool $plain = true, string $media = null) {
+	private function addThemeHeaders(ITheme $theme, bool $plain = true, ?string $media = null): void {
 		$linkToCSS = $this->urlGenerator->linkToRoute('theming.Theming.getThemeStylesheet', [
-			'themeId' => $themeId,
+			'themeId' => $theme->getId(),
 			'plain' => $plain,
 			'v' => $this->util->getCacheBuster(),
 		]);
@@ -101,4 +81,36 @@ class ThemeInjectionService {
 			'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)),
+			]);
+		}
+	}
 }