Updated UniversalWindowsPlatform

ChatApp/ChatApp/Common/BindableBase.cs

@@ -1,27 +1,11 @@
-
-using System;
-using System.ComponentModel;
-using System.Runtime.CompilerServices;
+using GalaSoft.MvvmLight;
 
 namespace ChatApp.Common
 {
     /// <summary>
     /// Provides a standard change-notification implementation.
     /// </summary>
-    public abstract class BindableBase : INotifyPropertyChanged
+    public abstract class BindableBase : ViewModelBase
     {
-        public event PropertyChangedEventHandler PropertyChanged;
-
-        public void OnPropertyChanged([CallerMemberName] string propertyName = null) => 
-            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
-
-        protected bool SetProperty<T>(ref T storage, T value,
-            [CallerMemberName] String propertyName = null)
-        {
-            if (object.Equals(storage, value)) return false;
-            storage = value;
-            OnPropertyChanged(propertyName);
-            return true;
-        }
     }
 }

ChatApp/ChatApp/ViewModels/ChatPageViewModel.cs

@@ -1,14 +1,8 @@
-
-using ChatApp.Commands;
+using ChatApp.Commands;
 using ChatApp.Common;
 using ChatApp.Facades;
 using ChatApp.Models.Csharp;
-using System;
-using System.Collections.Generic;
 using System.Collections.ObjectModel;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using System.Windows.Input;
 
 namespace ChatApp.ViewModels
@@ -28,14 +22,17 @@ public class ChatPageViewModel : BindableBase
         public string Text
         {
             get { return _text; }
-            set { SetProperty(ref _text, value); }
+            set { base.Set(ref _text, value); }
         }
+
         public ObservableCollection<Message> MessageThread
         {
             get { return _messageThread; }
-            private set { SetProperty(ref _messageThread, value); }
+            private set { base.Set(ref _messageThread, value); }
         }
+
         public ICommand SendMessage { get; set; }
+
         /// <summary>
         /// The chat correspondent.
         /// </summary>
@@ -44,11 +41,9 @@ public Profile ChatCorrespondent
             get { return _chatCorrespondent; }
             set
             {
-                if(_chatCorrespondent == null || value.User.Id != _chatCorrespondent.User.Id)
-                {
-                    SetProperty(ref _chatCorrespondent, value);
-                    MessageThread = MessageFacade.GetMessages();
-                }
+                if (_chatCorrespondent != null && value.User.Id == _chatCorrespondent.User.Id) return;
+                base.Set(ref _chatCorrespondent, value);
+                MessageThread = MessageFacade.GetMessages();
             }
         }
 
@@ -59,12 +54,12 @@ public ChatPageViewModel()
         }
 
         /// <summary>
-        /// Sets the message to text from the textbox.
+        /// Sets the message to text from the text box.
         /// </summary>
         /// <param name="text"></param>
         internal void SetText(string text)
         {
             Text = text;
         }
     }
-}
+}

ChatApp/ChatApp/ViewModels/ContactsPageViewModel.cs

@@ -1,12 +1,7 @@
 using ChatApp.Common;
 using ChatApp.Facades;
 using ChatApp.Models.Csharp;
-using System;
-using System.Collections.Generic;
 using System.Collections.ObjectModel;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace ChatApp.ViewModels
 {
@@ -16,20 +11,19 @@ namespace ChatApp.ViewModels
     /// </summary>
     public class ContactsPageViewModel : BindableBase
     {
-        private string error;
+        private readonly string error;
         public static ObservableCollection<User> _allFriends;
         public static ObservableCollection<RecentConversation> _recentConversations;
-        private ObservableCollection<Profile> _friends;
 
-        public ObservableCollection<User> AllFriends { get { return _allFriends; } }
-        public ObservableCollection<RecentConversation> RecentConversations { get { return _recentConversations; } }
-        public ObservableCollection<Profile> Friends { get { return _friends; } }
-        
+        public ObservableCollection<User> AllFriends => _allFriends;
+        public ObservableCollection<RecentConversation> RecentConversations => _recentConversations;
+        public ObservableCollection<Profile> Friends { get; }
+
         public ContactsPageViewModel()
         {
             _allFriends = ContactFacade.GetAllFriends(out error);
             _recentConversations = ContactFacade.GetRecentConversations(out error);
-            _friends = ContactFacade.GetFriendProfiles();
+            Friends = ContactFacade.GetFriendProfiles();
         }
     }
 }

ChatApp/ChatApp/project.json

@@ -1,6 +1,7 @@
 {
   "dependencies": {
-    "Microsoft.NETCore.UniversalWindowsPlatform": "5.0.0"
+    "Microsoft.NETCore.UniversalWindowsPlatform": "5.2.3",
+    "MvvmLightLibs": "5.3.0"
   },
   "frameworks": {
     "uap10.0": {}