Generate PNG version of the theming app logo for mails

Signed-off-by: Julius Härtl <jus@bitgrid.net>

4 files changed, 68 insertions, 21 deletions

diff --git a/apps/theming/lib/Controller/ThemingController.php b/apps/theming/lib/Controller/ThemingController.php
index c50e8a18460..f3a7f8cfcc5 100644
--- a/apps/theming/lib/Controller/ThemingController.php
+++ b/apps/theming/lib/Controller/ThemingController.php
@@ -267,6 +267,8 @@ class ThemingController extends Controller {
 			$folder = $this->appData->newFolder('images');
 		}
 
+		$this->imageManager->delete($key);
+
 		$target = $folder->newFile($key);
 		$supportedFormats = ['image/jpeg', 'image/png', 'image/gif', 'image/svg+xml', 'image/svg'];
 		$detectedMimeType = mime_content_type($image['tmp_name']);
@@ -359,9 +361,9 @@ class ThemingController extends Controller {
 	 * @return FileDisplayResponse|NotFoundResponse
 	 * @throws \Exception
 	 */
-	public function getImage(string $key) {
+	public function getImage(string $key, bool $asPng = false) {
 		try {
-			$file = $this->imageManager->getImage($key);
+			$file = $this->imageManager->getImage($key, $asPng);
 		} catch (NotFoundException $e) {
 			return new NotFoundResponse();
 		}
@@ -370,6 +372,11 @@ class ThemingController extends Controller {
 		$response->cacheFor(3600);
 		$response->addHeader('Content-Type', $this->config->getAppValue($this->appName, $key . 'Mime', ''));
 		$response->addHeader('Content-Disposition', 'attachment; filename="' . $key . '"');
+		if ($asPng) {
+			$response->addHeader('Content-Type', 'image/png');
+		} else {
+			$response->addHeader('Content-Type', $this->config->getAppValue($this->appName, $key . 'Mime', ''));
+		}
 		return $response;
 	}
 
diff --git a/apps/theming/lib/ImageManager.php b/apps/theming/lib/ImageManager.php
index 830ed7f34a9..693d2bbe1d4 100644
--- a/apps/theming/lib/ImageManager.php
+++ b/apps/theming/lib/ImageManager.php
@@ -26,6 +26,7 @@ namespace OCA\Theming;
 
 use OCP\Files\SimpleFS\ISimpleFile;
 use OCP\Files\SimpleFS\ISimpleFolder;
+use OCP\ICacheFactory;
 use OCP\IConfig;
 use OCP\Files\IAppData;
 use OCP\Files\NotFoundException;
@@ -41,9 +42,12 @@ class ImageManager {
 	private $config;
 	/** @var IAppData */
 	private $appData;
-
+	/** @var IURLGenerator */
+	private $urlGenerator;
 	/** @var array */
 	private $supportedImageKeys = ['background', 'logo', 'logoheader', 'favicon'];
+	/** @var ICacheFactory */
+	private $cacheFactory;
 
 	/**
 	 * ImageManager constructor.
@@ -51,14 +55,17 @@ class ImageManager {
 	 * @param IConfig $config
 	 * @param IAppData $appData
 	 * @param IURLGenerator $urlGenerator
+	 * @param ThemingDefaults $themingDefaults
 	 */
 	public function __construct(IConfig $config,
 								IAppData $appData,
-								IURLGenerator $urlGenerator
+								IURLGenerator $urlGenerator,
+								ICacheFactory $cacheFactory
 	) {
 		$this->config = $config;
 		$this->appData = $appData;
 		$this->urlGenerator = $urlGenerator;
+		$this->cacheFactory = $cacheFactory;
 	}
 
 	public function getImageUrl(string $key): string {
@@ -88,12 +95,28 @@ class ImageManager {
 	 * @return ISimpleFile
 	 * @throws NotFoundException
 	 */
-	public function getImage(string $key): ISimpleFile {
+	public function getImage(string $key, bool $useSvg = false): ISimpleFile {
 		$logo = $this->config->getAppValue('theming', $key . 'Mime', false);
 		if ($logo === false) {
 			throw new NotFoundException();
 		}
 		$folder = $this->appData->getFolder('images');
+		if (!$useSvg && $this->shouldReplaceIcons()) {
+			if (!$folder->fileExists($key . '.png')) {
+				try {
+					$finalIconFile = new \Imagick();
+					$finalIconFile->setBackgroundColor('none');
+					$finalIconFile->readImageBlob($folder->getFile($key)->getContent());
+					$finalIconFile->setImageFormat('png32');
+					$pngFile = $folder->newFile($key . '.png');
+					$pngFile->putContent($finalIconFile->getImageBlob());
+				} catch (\ImagickException $e) {
+				}
+			} else {
+				$pngFile = $folder->getFile($key . '.png');
+			}
+			return $pngFile;
+		}
 		return $folder->getFile($key);
 	}
 
@@ -165,6 +188,12 @@ class ImageManager {
 		} catch (NotFoundException $e) {
 		} catch (NotPermittedException $e) {
 		}
+		try {
+			$file = $this->appData->getFolder('images')->getFile($key . '.png');
+			$file->delete();
+		} catch (NotFoundException $e) {
+		} catch (NotPermittedException $e) {
+		}
 	}
 
 	/**
@@ -182,4 +211,25 @@ class ImageManager {
 			}
 		}
 	}
+
+	/**
+	 * Check if Imagemagick is enabled and if SVG is supported
+	 * otherwise we can't render custom icons
+	 *
+	 * @return bool
+	 */
+	public function shouldReplaceIcons() {
+		$cache = $this->cacheFactory->createDistributed('theming-' . $this->urlGenerator->getBaseUrl());
+		if($value = $cache->get('shouldReplaceIcons')) {
+			return (bool)$value;
+		}
+		$value = false;
+		if(extension_loaded('imagick')) {
+			if (count(\Imagick::queryFormats('SVG')) >= 1) {
+				$value = true;
+			}
+		}
+		$cache->set('shouldReplaceIcons', $value);
+		return $value;
+	}
 }
diff --git a/apps/theming/lib/ThemingDefaults.php b/apps/theming/lib/ThemingDefaults.php
index 00c47676bc8..a46676a43a9 100644
--- a/apps/theming/lib/ThemingDefaults.php
+++ b/apps/theming/lib/ThemingDefaults.php
@@ -205,7 +205,7 @@ class ThemingDefaults extends \OC_Defaults {
 
 		$logoExists = true;
 		try {
-			$this->imageManager->getImage('logo');
+			$this->imageManager->getImage('logo', $useSvg);
 		} catch (\Exception $e) {
 			$logoExists = false;
 		}
@@ -221,7 +221,7 @@ class ThemingDefaults extends \OC_Defaults {
 			return $logo . '?v=' . $cacheBusterCounter;
 		}
 
-		return $this->urlGenerator->linkToRoute('theming.Theming.getImage', [ 'key' => 'logo' ]) . '?v=' . $cacheBusterCounter;
+		return $this->urlGenerator->linkToRoute('theming.Theming.getImage', [ 'key' => 'logo', 'useSvg' => $useSvg, 'v' => $cacheBusterCounter ]);
 	}
 
 	/**
@@ -339,23 +339,12 @@ class ThemingDefaults extends \OC_Defaults {
 	 * Check if Imagemagick is enabled and if SVG is supported
 	 * otherwise we can't render custom icons
 	 *
+	 * TODO: move to usage of image manager
+	 *
 	 * @return bool
 	 */
 	public function shouldReplaceIcons() {
-		$cache = $this->cacheFactory->createDistributed('theming-' . $this->urlGenerator->getBaseUrl());
-		if($value = $cache->get('shouldReplaceIcons')) {
-			return (bool)$value;
-		}
-		$value = false;
-		if(extension_loaded('imagick')) {
-			$checkImagick = new \Imagick();
-			if (count($checkImagick->queryFormats('SVG')) >= 1) {
-				$value = true;
-			}
-			$checkImagick->clear();
-		}
-		$cache->set('shouldReplaceIcons', $value);
-		return $value;
+		return $this->imageManager->shouldReplaceIcons();
 	}
 
 	/**
diff --git a/apps/theming/tests/ImageManagerTest.php b/apps/theming/tests/ImageManagerTest.php
index 4e258ce7162..3993efc1c52 100644
--- a/apps/theming/tests/ImageManagerTest.php
+++ b/apps/theming/tests/ImageManagerTest.php
@@ -24,6 +24,7 @@
 namespace OCA\Theming\Tests;
 
 use OCA\Theming\ImageManager;
+use OCA\Theming\ThemingDefaults;
 use OCP\Files\SimpleFS\ISimpleFile;
 use OCP\IConfig;
 use OCP\IURLGenerator;