Fix excessive increase of cachebuster value

Signed-off-by: Christopher Ng <chrng8@gmail.com>

apps/theming/lib/Controller/UserThemeController.php

@@ -34,6 +34,7 @@ use OCA\Theming\AppInfo\Application;
 use OCA\Theming\ITheme;
 use OCA\Theming\Service\BackgroundService;
 use OCA\Theming\Service\ThemesService;
+use OCA\Theming\ThemingDefaults;
 use OCP\AppFramework\Http;
 use OCP\AppFramework\Http\DataResponse;
 use OCP\AppFramework\Http\FileDisplayResponse;
@@ -53,6 +54,7 @@ class UserThemeController extends OCSController {
 	private IConfig $config;
 	private IUserSession $userSession;
 	private ThemesService $themesService;
+	private ThemingDefaults $themingDefaults;
 	private BackgroundService $backgroundService;
 
 	/**
@@ -63,11 +65,13 @@ class UserThemeController extends OCSController {
 								IConfig $config,
 								IUserSession $userSession,
 								ThemesService $themesService,
+								ThemingDefaults $themingDefaults,
 								BackgroundService $backgroundService) {
 		parent::__construct($appName, $request);
 		$this->config = $config;
 		$this->userSession = $userSession;
 		$this->themesService = $themesService;
+		$this->themingDefaults = $themingDefaults;
 		$this->backgroundService = $backgroundService;
 		$this->userId = $userSession->getUser()->getUID();
 	}
@@ -177,6 +181,8 @@ class UserThemeController extends OCSController {
 		}
 		$currentVersion++;
 		$this->config->setUserValue($this->userId, Application::APP_ID, 'backgroundVersion', (string)$currentVersion);
+		// FIXME replace with user-specific cachebuster increase https://github.com/nextcloud/server/issues/34472
+		$this->themingDefaults->increaseCacheBuster();
 		return new JSONResponse([
 			'type' => $type,
 			'value' => $value,

apps/theming/lib/ThemingDefaults.php

@@ -224,10 +224,8 @@ class ThemingDefaults extends \OC_Defaults {
 		if ($color === '' && !empty($user)) {
 			$themingBackground = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'background', 'default');
 			if ($themingBackground === 'default') {
-				$this->increaseCacheBuster();
 				return BackgroundService::DEFAULT_COLOR;
 			} else if (isset(BackgroundService::SHIPPED_BACKGROUNDS[$themingBackground]['primary_color'])) {
-				$this->increaseCacheBuster();
 				return BackgroundService::SHIPPED_BACKGROUNDS[$themingBackground]['primary_color'];
 			}
 		}
@@ -411,7 +409,7 @@ class ThemingDefaults extends \OC_Defaults {
 	/**
 	 * Increases the cache buster key
 	 */
-	private function increaseCacheBuster(): void {
+	public function increaseCacheBuster(): void {
 		$cacheBusterKey = (int)$this->config->getAppValue('theming', 'cachebuster', '0');
 		$this->config->setAppValue('theming', 'cachebuster', (string)($cacheBusterKey + 1));
 		$this->cacheFactory->createDistributed('theming-')->clear();

apps/theming/tests/Controller/UserThemeControllerTest.php

@@ -33,6 +33,7 @@ use OCA\Theming\Themes\DyslexiaFont;
 use OCA\Theming\Themes\HighContrastTheme;
 use OCA\Theming\Service\ThemesService;
 use OCA\Theming\Themes\LightTheme;
+use OCA\Theming\ThemingDefaults;
 use OCP\AppFramework\Http\DataResponse;
 use OCP\AppFramework\OCS\OCSBadRequestException;
 use OCP\IConfig;
@@ -54,6 +55,8 @@ class UserThemeControllerTest extends TestCase {
 	private $userSession;
 	/** @var ThemeService|MockObject */
 	private $themesService;
+	/** @var ThemingDefaults */
+	private $themingDefaults;
 	/** @var BackgroundService|MockObject */
 	private $backgroundService;
 
@@ -66,6 +69,7 @@ class UserThemeControllerTest extends TestCase {
 		$this->config = $this->createMock(IConfig::class);
 		$this->userSession = $this->createMock(IUserSession::class);
 		$this->themesService = $this->createMock(ThemesService::class);
+		$this->themingDefaults = $this->createMock(ThemingDefaults::class);
 		$this->backgroundService = $this->createMock(BackgroundService::class);
 
 		$this->themes = [
@@ -91,6 +95,7 @@ class UserThemeControllerTest extends TestCase {
 			$this->config,
 			$this->userSession,
 			$this->themesService,
+			$this->themingDefaults,
 			$this->backgroundService,
 		);