Added progress rings and error feedback

HueUWP/APIHandler.cs

@@ -20,17 +20,21 @@ namespace HueUWP
             this.nwh = nwh;
         }
 
-        public async Task Register()
+        public async Task<String> Register()
         {
-            try {
-                var json = await nwh.RegisterName("Hue", "Kenneth&Yorick");
+            try
+            {
+                var json = await nwh.RegisterName("YK Hue", "YK");
                 json = json.Replace("[", "").Replace("]", "");
                 JObject o = JObject.Parse(json);
                 string id = o["success"]["username"].ToString();
-                MainPage.LOCAL_SETTINGS.Values["id"] = id; }
-            catch(Exception e)
+                MainPage.LOCAL_SETTINGS.Values["id"] = id;
+                return "success";
+            }
+            catch (Exception e)
             {
                 Debug.WriteLine("Could not register.");
+                return "error";
             }
         }
 
@@ -45,15 +49,17 @@ namespace HueUWP
             lights.ForEach(l => SetLightState(l));
         }
 
-        public async void SetLightValues(Light l)
+        public async Task<String> SetLightValues(Light l)
         {
             if(l.IsOn)
             {
                 Debug.WriteLine(l.Hue);
                 var json = await nwh.SetLightInfo(l.ID, $"{{\"bri\": {l.Brightness},\"hue\": {(l.Hue)},\"sat\": {l.Saturation}}}");
                 Debug.WriteLine(json);
+                return "success";
             }
             
+            return "error";
         }
 
         public async void SetLightValues(List<Light> lights)
@@ -85,14 +91,15 @@ namespace HueUWP
                 // );
 
                 //lightlist.ForEach(q => alllights.Add(q));
+
+                return "success";
             }
             catch(Exception e)
             {
                 Debug.WriteLine(e.StackTrace);
                 Debug.WriteLine("Could not get all lights.");
+                return "error";
             }
-
-            return string.Empty;
         }