/// <summary>
/// Handler for ChatMessage related messages.
/// </summary>
/// <param name="chatMessage"> Message to handle. </param>
/// <param name="notification"> Type of operation. </param>
private void HandleChatMessageNotification(ChatMessage chatMessage, string notification)
{
// todo: set listeners to be specific to chat room
if (chatMessage.ChatRoomId != Id)
{
return;
}
switch (notification)
{
case "Add":
{
// todo: add this to dto model
// set user for message
chatMessage.User = Users.SingleOrDefault(i => i.Id == chatMessage.UserId);
DispatcherHelper.CheckBeginInvokeOnUI(() =>
{
if (ChatMessages.All(i => i.Id != chatMessage.Id))
{
ChatMessages.Add(chatMessage);
}
});
break;
}
case "Remove":
{
var messageToRemove = ChatMessages.SingleOrDefault(i => i.Id == chatMessage.Id);
if (messageToRemove != null)
{
DispatcherHelper.CheckBeginInvokeOnUI(() => { ChatMessages.Remove(messageToRemove); });
}
break;
}
case "SubmitEdit":
_chatMessageDataService.Edit(chatMessage);
break;
case "Edit":
{
var messageToEdit = ChatMessages.SingleOrDefault(i => i.Id == chatMessage.Id);
if (messageToEdit != null)
{
DispatcherHelper.CheckBeginInvokeOnUI(() => messageToEdit.Message = chatMessage.Message);
}
break;
}
}
}
private void GetDataFromFirebase()
{
Action <Dictionary <string, ChatMessage> > onValueEvent = (Dictionary <string, ChatMessage> messages) =>
{
try
{
System.Diagnostics.Debug.WriteLine("---> EVENT GetDataFromFirebase ");
Action onSetValueSuccess = () =>
{
};
Action <string> onSetValueError = (string errorDesc) =>
{
};
if (messages == null)
{
}
else
{
if (messages.Count != 0 && ChatMessages.Count != messages.Count)
{
foreach (var message in messages.OrderBy(m => m.Value.DateMessageTimeSpan))
{
message.Value.IsYourMessage = UserCurent.Name == message.Value.UserName;
if (ChatMessages.All(m => m.Id != message.Value.Id))
{
ChatMessages.Add(message.Value);
System.Diagnostics.Debug.WriteLine("---> add new -> " + message.Value.Id);
}
}
MessagingCenter.Send <ChatVM>(this, "ScrollToEnd");
}
}
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("---> error GetDataFromFirebase " + ex.Message);
throw;
}
};
_firebaseDatabase.AddValueEvent("chats", onValueEvent);
}