fix(JSResourceLocator): Handle missing translations silently

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

lib/private/Template/JSResourceLocator.php

@@ -99,21 +99,28 @@ class JSResourceLocator extends ResourceLocator {
 			// gets turned into cwd.
 			$app_path = realpath($app_path);
 
-			// missing translations files will be ignored
-			if (strpos($script, 'l10n/') === 0) {
-				$this->appendScriptIfExist($app_path, $script, $app_url);
+			// check combined files
+			if ($this->cacheAndAppendCombineJsonIfExist($app_path, $script.'.json', $app)) {
 				return;
 			}
 
-			if (!$this->cacheAndAppendCombineJsonIfExist($app_path, $script.'.json', $app)) {
-				$this->appendScriptIfExist($app_path, $script, $app_url);
+			// fallback to plain file location
+			if ($this->appendScriptIfExist($app_path, $script, $app_url)) {
+				return;
 			}
 		} catch (AppPathNotFoundException) {
-			$this->logger->error('Could not find resource {resource} to load', [
-				'resource' => $app . '/' . $script . '.js',
-				'app' => 'jsresourceloader',
-			]);
+			// pass (general error handling happens below)
 		}
+
+		// missing translations files will be ignored
+		if (strpos($script, 'l10n/') === 0) {
+			return;
+		}
+
+		$this->logger->error('Could not find resource {resource} to load', [
+			'resource' => $app . '/' . $script . '.js',
+			'app' => 'jsresourceloader',
+		]);
 	}
 
 	/**

tests/lib/Template/JSResourceLocatorTest.php

@@ -26,6 +26,7 @@ namespace Test\Template;
 use OC\SystemConfig;
 use OC\Template\JSCombiner;
 use OC\Template\JSResourceLocator;
+use OCP\App\AppPathNotFoundException;
 use OCP\App\IAppManager;
 use OCP\Files\IAppData;
 use OCP\ICacheFactory;
@@ -139,6 +140,27 @@ class JSResourceLocatorTest extends \Test\TestCase {
 		$this->rrmdir($new_apps_path);
 	}
 
+	public function testNotExistingTranslationHandledSilent() {
+		$this->appManager->expects($this->once())
+			->method('getAppPath')
+			->with('core')
+			->willThrowException(new AppPathNotFoundException());
+		$this->appManager->expects($this->once())
+			->method('getAppWebPath')
+			->with('core')
+			->willThrowException(new AppPathNotFoundException());
+		// Assert logger is not called
+		$this->logger->expects($this->never())
+			->method('error');
+
+		// Run the tests
+		$locator = $this->jsResourceLocator();
+		$locator->find(["core/l10n/en.js"]);
+
+		$resources = $locator->getResources();
+		$this->assertCount(0, $resources);
+	}
+
 	public function testFindModuleJSWithFallback() {
 		// First create new apps path, and a symlink to it
 		$apps_dirname = $this->randomString();