internal void AddPreviousMessages(IEnumerable <ChatMessageViewModel> messages)
{
bool hasUpdates = false;
_messages.IsNotifying = false;
foreach (var chatMessage in messages.Reverse())
{
chatMessage.HasBeenSeen = true;
var firstMessageGroup = _messages.FirstOrDefault() as ChatMessageGroupViewModel;
if (firstMessageGroup == null || !firstMessageGroup.TryAddPreviousMessage(chatMessage))
{
var groupMessage = new ChatMessageGroupViewModel(chatMessage);
_messages.Insert(0, groupMessage);
hasUpdates = true;
}
}
_messages.IsNotifying = true;
if (hasUpdates)
{
_messages.Refresh();
}
IsRequestingPreviousMessages = false;
}
internal void ProcessMessage(ChatMessageViewModel viewModel, bool suppressUnreadNotifications = false)
{
viewModel.HasBeenSeen = IsRoomVisible(suppressUnreadNotifications);
var lastGroupMessage = _messages.LastOrDefault() as ChatMessageGroupViewModel;
if (lastGroupMessage == null || !lastGroupMessage.TryAddMessage(viewModel))
{
var groupViewModel = new ChatMessageGroupViewModel(viewModel);
_messages.Add(groupViewModel);
}
UpdateUnreadMessageCount();
}