Make dashboard installable as Chrome desktop PWA

Signed-off-by: nhirokinet <nhirokinet@nhiroki.net>

Author: nhirokinet

apps/theming/lib/Controller/ThemingController.php

@@ -376,7 +376,11 @@ public function getManifest($app) {
 		$cacheBusterValue = $this->config->getAppValue('theming', 'cachebuster', '0');
 		$responseJS = [
 			'name' => $this->themingDefaults->getName(),
-			'start_url' => $this->urlGenerator->getBaseUrl(),
+			'start_url' => $this->urlGenerator->getBaseUrl() . '/',
+			'short_name' => $this->themingDefaults->getName(),
+			'description' => $this->themingDefaults->getName(),
+			'theme_color' => $this->themingDefaults->getColorPrimary(),
+			'background_color' => '#ffffff',
 			'icons' =>
 				[
 					[

core/js/serviceworker.js

@@ -0,0 +1,7 @@
+self.addEventListener('install', function(e) {});
+
+self.addEventListener('fetch',
+    function(e) {
+        e.respondWith(fetch(e.request).then(function(response){ return response; }));
+    }
+);

core/js/serviceworker_loader.js

@@ -0,0 +1,5 @@
+if ('serviceWorker' in navigator) {
+    window.addEventListener('load', function() {
+        navigator.serviceWorker.register(OC.getRootPath() + '/core/js/serviceworker.js', {scope: OC.getRootPath() + '/'});
+    });
+}

lib/private/legacy/OC_Template.php

@@ -118,6 +118,7 @@ public static function initTemplateEngine($renderAs) {
 				OC_Util::addScript('merged-template-prepend', null, true);
 				OC_Util::addScript('dist/files_client', null, true);
 				OC_Util::addScript('dist/files_fileinfo', null, true);
+				OC_Util::addScript('serviceworker_loader', null, true);
 			}
 			OC_Util::addScript('core', 'dist/main', true);