fix(theming): Also reset background color settings when updating global background image

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

4 files changed, 94 insertions, 86 deletions

diff --git a/apps/theming/lib/ImageManager.php b/apps/theming/lib/ImageManager.php
index 69ab14731e8..e98971daf3a 100644
--- a/apps/theming/lib/ImageManager.php
+++ b/apps/theming/lib/ImageManager.php
@@ -57,6 +57,7 @@ class ImageManager {
 		private ICacheFactory $cacheFactory,
 		private LoggerInterface $logger,
 		private ITempManager $tempManager,
+		private BackgroundService $backgroundService,
 	) {
 	}
 
@@ -228,47 +229,56 @@ class ImageManager {
 			throw new \Exception('Unsupported image type: ' . $detectedMimeType);
 		}
 
-		if ($key === 'background' && $this->shouldOptimizeBackgroundImage($detectedMimeType, filesize($tmpFile))) {
-			try {
-				// Optimize the image since some people may upload images that will be
-				// either to big or are not progressive rendering.
-				$newImage = @imagecreatefromstring(file_get_contents($tmpFile));
-				if ($newImage === false) {
-					throw new \Exception('Could not read background image, possibly corrupted.');
-				}
+		if ($key === 'background') {
+			if ($this->shouldOptimizeBackgroundImage($detectedMimeType, filesize($tmpFile))) {
+				try {
+					// Optimize the image since some people may upload images that will be
+					// either to big or are not progressive rendering.
+					$newImage = @imagecreatefromstring(file_get_contents($tmpFile));
+					if ($newImage === false) {
+						throw new \Exception('Could not read background image, possibly corrupted.');
+					}
 
-				// Preserve transparency
-				imagesavealpha($newImage, true);
-				imagealphablending($newImage, true);
+					// Preserve transparency
+					imagesavealpha($newImage, true);
+					imagealphablending($newImage, true);
 
-				$newWidth = (imagesx($newImage) < 4096 ? imagesx($newImage) : 4096);
-				$newHeight = (int)(imagesy($newImage) / (imagesx($newImage) / $newWidth));
-				$outputImage = imagescale($newImage, $newWidth, $newHeight);
-				if ($outputImage === false) {
-					throw new \Exception('Could not scale uploaded background image.');
-				}
+					$imageWidth = imagesx($newImage);
+					$imageHeight = imagesy($newImage);
 
-				$newTmpFile = $this->tempManager->getTemporaryFile();
-				imageinterlace($outputImage, true);
-				// Keep jpeg images encoded as jpeg
-				if (str_contains($detectedMimeType, 'image/jpeg')) {
-					if (!imagejpeg($outputImage, $newTmpFile, 90)) {
-						throw new \Exception('Could not recompress background image as JPEG');
+					/** @var int */
+					$newWidth = min(4096, $imageWidth);
+					$newHeight = intval($imageHeight / ($imageWidth / $newWidth));
+					$outputImage = imagescale($newImage, $newWidth, $newHeight);
+					if ($outputImage === false) {
+						throw new \Exception('Could not scale uploaded background image.');
 					}
-				} else {
-					if (!imagepng($outputImage, $newTmpFile, 8)) {
-						throw new \Exception('Could not recompress background image as PNG');
+
+					$newTmpFile = $this->tempManager->getTemporaryFile();
+					imageinterlace($outputImage, true);
+					// Keep jpeg images encoded as jpeg
+					if (str_contains($detectedMimeType, 'image/jpeg')) {
+						if (!imagejpeg($outputImage, $newTmpFile, 90)) {
+							throw new \Exception('Could not recompress background image as JPEG');
+						}
+					} else {
+						if (!imagepng($outputImage, $newTmpFile, 8)) {
+							throw new \Exception('Could not recompress background image as PNG');
+						}
 					}
-				}
-				$tmpFile = $newTmpFile;
-				imagedestroy($outputImage);
-			} catch (\Exception $e) {
-				if (is_resource($outputImage) || $outputImage instanceof \GdImage) {
+					$tmpFile = $newTmpFile;
 					imagedestroy($outputImage);
-				}
+				} catch (\Exception $e) {
+					if (isset($outputImage) && is_resource($outputImage) || $outputImage instanceof \GdImage) {
+						imagedestroy($outputImage);
+					}
 
-				$this->logger->debug($e->getMessage());
+					$this->logger->debug($e->getMessage());
+				}
 			}
+
+			// For background images we need to announce it
+			$this->backgroundService->setGlobalBackground($tmpFile);
 		}
 
 		$target->putContent(file_get_contents($tmpFile));
diff --git a/apps/theming/lib/Service/BackgroundService.php b/apps/theming/lib/Service/BackgroundService.php
index edbcda47c05..cc053baf39a 100644
--- a/apps/theming/lib/Service/BackgroundService.php
+++ b/apps/theming/lib/Service/BackgroundService.php
@@ -286,21 +286,19 @@ class BackgroundService {
 	}
 
 	/**
-	 * Storing the data in appdata/theming/users/USERID
-	 *
-	 * @return ISimpleFolder
-	 * @throws NotPermittedException
+	 * Called when a new global background (backgroundMime) is uploaded (admin setting)
+	 * This sets all necessary app config values
+	 * @param resource|string $path
 	 */
-	private function getAppDataFolder(): ISimpleFolder {
-		try {
-			$rootFolder = $this->appData->getFolder('users');
-		} catch (NotFoundException $e) {
-			$rootFolder = $this->appData->newFolder('users');
-		}
-		try {
-			return $rootFolder->getFolder($this->userId);
-		} catch (NotFoundException $e) {
-			return $rootFolder->newFolder($this->userId);
+	public function setGlobalBackground($path): void {
+		$image = new \OCP\Image();
+		$handle = is_resource($path) ? $path : fopen($path, 'rb');
+
+		if ($handle && $image->loadFromFileHandle($handle) !== false) {
+			$meanColor = $this->calculateMeanColor($image);
+			if ($meanColor !== false) {
+				$this->config->setAppValue(Application::APP_ID, 'background_color', $meanColor);
+			}
 		}
 	}
 
@@ -359,4 +357,23 @@ class BackgroundService {
 		$meanColor .= toHex((int)(array_sum($blues) / count($blues)));
 		return $meanColor;
 	}
+
+	/**
+	 * Storing the data in appdata/theming/users/USERID
+	 *
+	 * @return ISimpleFolder
+	 * @throws NotPermittedException
+	 */
+	private function getAppDataFolder(): ISimpleFolder {
+		try {
+			$rootFolder = $this->appData->getFolder('users');
+		} catch (NotFoundException $e) {
+			$rootFolder = $this->appData->newFolder('users');
+		}
+		try {
+			return $rootFolder->getFolder($this->userId);
+		} catch (NotFoundException $e) {
+			return $rootFolder->newFolder($this->userId);
+		}
+	}
 }
diff --git a/apps/theming/lib/Themes/CommonThemeTrait.php b/apps/theming/lib/Themes/CommonThemeTrait.php
index efeb3f0d97c..e15b127645e 100644
--- a/apps/theming/lib/Themes/CommonThemeTrait.php
+++ b/apps/theming/lib/Themes/CommonThemeTrait.php
@@ -132,7 +132,7 @@ trait CommonThemeTrait {
 			&& !$this->themingDefaults->isUserThemingDisabled()
 			&& $this->appManager->isEnabledForUser(Application::APP_ID)) {
 			$backgroundImage = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'background_image', BackgroundService::BACKGROUND_DEFAULT);
-			$backgroundColor = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'background_color', $this->themingDefaults->getColorPrimary());
+			$backgroundColor = $this->config->getUserValue($user->getUID(), Application::APP_ID, 'background_color', $this->themingDefaults->getColorBackground());
 
 			$currentVersion = (int)$this->config->getUserValue($user->getUID(), Application::APP_ID, 'userCacheBuster', '0');
 			$isBackgroundBright = $this->util->invertTextColor($backgroundColor);
diff --git a/apps/theming/lib/ThemingDefaults.php b/apps/theming/lib/ThemingDefaults.php
index 29d564e77ac..04ec22fe700 100644
--- a/apps/theming/lib/ThemingDefaults.php
+++ b/apps/theming/lib/ThemingDefaults.php
@@ -7,6 +7,7 @@
  * @author Bjoern Schiessle <bjoern@schiessle.org>
  * @author Christoph Wurst <christoph@winzerhof-wurst.at>
  * @author Daniel Kesselberg <mail@danielkesselberg.de>
+ * @author Ferdinand Thiessen <opensource@fthiessen.de>
  * @author Guillaume COMPAGNON <gcompagnon@outlook.com>
  * @author Jan-Christoph Borchardt <hey@jancborchardt.net>
  * @author Joachim Bauch <bauch@struktur.de>
@@ -55,16 +56,6 @@ use OCP\IUserSession;
 
 class ThemingDefaults extends \OC_Defaults {
 
-	private IConfig $config;
-	private IL10N $l;
-	private ImageManager $imageManager;
-	private IUserSession $userSession;
-	private IURLGenerator $urlGenerator;
-	private ICacheFactory $cacheFactory;
-	private Util $util;
-	private IAppManager $appManager;
-	private INavigationManager $navigationManager;
-
 	private string $name;
 	private string $title;
 	private string $entity;
@@ -80,36 +71,20 @@ class ThemingDefaults extends \OC_Defaults {
 
 	/**
 	 * ThemingDefaults constructor.
-	 *
-	 * @param IConfig $config
-	 * @param IL10N $l
-	 * @param ImageManager $imageManager
-	 * @param IUserSession $userSession
-	 * @param IURLGenerator $urlGenerator
-	 * @param ICacheFactory $cacheFactory
-	 * @param Util $util
-	 * @param IAppManager $appManager
 	 */
-	public function __construct(IConfig $config,
-		IL10N $l,
-		IUserSession $userSession,
-		IURLGenerator $urlGenerator,
-		ICacheFactory $cacheFactory,
-		Util $util,
-		ImageManager $imageManager,
-		IAppManager $appManager,
-		INavigationManager $navigationManager
+	public function __construct(
+		private IConfig $config,
+		private IL10N $l,
+		private IUserSession $userSession,
+		private IURLGenerator $urlGenerator,
+		private ICacheFactory $cacheFactory,
+		private Util $util,
+		private ImageManager $imageManager,
+		private IAppManager $appManager,
+		private INavigationManager $navigationManager,
+		private BackgroundService $backgroundService,
 	) {
 		parent::__construct();
-		$this->config = $config;
-		$this->l = $l;
-		$this->imageManager = $imageManager;
-		$this->userSession = $userSession;
-		$this->urlGenerator = $urlGenerator;
-		$this->cacheFactory = $cacheFactory;
-		$this->util = $util;
-		$this->appManager = $appManager;
-		$this->navigationManager = $navigationManager;
 
 		$this->name = parent::getName();
 		$this->title = parent::getTitle();
@@ -520,9 +495,15 @@ class ThemingDefaults extends \OC_Defaults {
 			case 'slogan':
 				$returnValue = $this->getSlogan();
 				break;
-			case 'color':
+			case 'primary_color':
 				$returnValue = $this->getDefaultColorPrimary();
 				break;
+			case 'background_color':
+				if ($this->imageManager->hasImage('background')) {
+					$file = $this->imageManager->getImage('background');
+					$this->backgroundService->setGlobalBackground($file->read());
+				}
+				break;
 			case 'logo':
 			case 'logoheader':
 			case 'background':