Introduce Progressive Web App feature to EGroupware

api/js/login.js

@@ -59,3 +59,14 @@ egw_LAB.wait(function()
 		]);
 	});
 });
+
+// register service worker
+if ('serviceWorker' in navigator) {
+  navigator.serviceWorker.register('./service-worker.js', {scope:"/egroupware/"})
+  .then(function(registration) {
+    console.log('Registration successful, scope is:', registration.scope);
+  })
+  .catch(function(error) {
+    console.log('Service worker registration failed, error:', error);
+  });
+}

manifest.json

@@ -0,0 +1,27 @@
+{
+	"short_name": "EGroupware",
+	"name": "EGroupware",
+	"category": ["business", "education"],
+	"description": "EGroupware is an online open-source enterprise software for business use and provides the services by using cutting edge collaboration technologies which allow organisations to collaborate in a secure and function rich environment, supporting integrated project teams across and within organisation boundaries.",
+	"orientation": "landscape-primary",
+	"icons": [
+	  {
+		"src": "api/templates/default/images/logo_192x192.png",
+		"type": "image/png",
+		"sizes": "192x192"
+	  },
+	  {
+		"src": "api/templates/default/images/logo_512x512.png",
+		"type": "image/png",
+		"sizes": "512x512"
+	  }
+	],
+	"start_url": "index.php",
+	"background_color": "#fafafa",
+	"display": "standalone",
+	"scope": "/egroupware",
+	"theme_color": "#0073ae",
+	"serviceworker": {
+		"src": "/service-worker.js"
+	}
+}

pixelegg/head.tpl

@@ -11,6 +11,7 @@
 		<meta name="author" content="EGroupware GmbH http://www.egroupware.org" />
 		{pngfix}
 		{meta_robots}
+		<link rel="manifest" href="{webserver_url}/manifest.json"/>
 		<link rel="icon" href="{img_icon}" type="image/x-ico" />
 		<link rel="shortcut icon" href="{img_shortcut}" />
 		<link rel="stylesheet" href="{webserver_url}/api/js/offline/themes/offline-theme-slide.css">

service-worker.js

@@ -0,0 +1,12 @@
+/**
+ * EGroupware service worker
+ *
+ * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
+ * @author Hadi Nategh <hn-At-egroupware.org>
+ * @copyright (c) 2019 by Hadi Nategh <hn-At-egroupware.org>
+ * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
+ */
+
+this.addEventListener('fetch', function (event) {
+    // temporary just to ommit error app not installable
+});