private void OnChatRemoved(string chatId)
{
ModifyChatsSafely(() =>
{
var chatSummary = ChatsCollection.FirstOrDefault(x => x.ChatId == chatId);
if (chatSummary != null)
{
ChatsCollection.Remove(chatSummary);
}
});
_messagesCache.RemoveMessagesAsync(chatId).FireAndForget();
}
private bool TryAddChat(ChatSummaryModel chatSummary)
{
return(ModifyChatsSafely(() =>
{
if (chatSummary == null || ChatsCollection.Any(x => x.ChatId == chatSummary.Id))
{
return false;
}
var viewModel = _viewModelFactoryService.ResolveViewModel <ChatSummaryViewModel, ChatSummaryModel>(chatSummary);
ChatsCollection.Insert(0, viewModel);
ChatsCollection.Sort((x, y) => y.LastUpdateDate.CompareTo(x.LastUpdateDate));
return true;
}));
}
private void OnChatUpdated(ChatSummaryModel updatedChatSummary)
{
if (updatedChatSummary == null)
{
return;
}
ModifyChatsSafely(() =>
{
var chatSummary = ChatsCollection.FirstOrDefault(x => x.ChatId == updatedChatSummary.Id);
if (chatSummary != null)
{
chatSummary.UpdateModel(updatedChatSummary);
}
});
}
private async Task UpdateChatsListWithLoader(Task <IList <ChatSummaryModel> > loader)
{
var result = await loader.ConfigureAwait(false);
if (result != null)
{
var orderedChats = result
.Select(_viewModelFactoryService.ResolveViewModel <ChatSummaryViewModel, ChatSummaryModel>)
.OrderByDescending(x => x.LastUpdateDate)
.ToList();
ModifyChatsSafely(() =>
{
ChatsCollection.ReplaceRange(orderedChats);
});
}
}
public async Task <ChatSummaryViewModel> FindOrCreateDirectChatAsync(string memberId)
{
var directChatWithMember = ChatsCollection.FirstOrDefault(x =>
x.Parameter.Type == ChannelType.Direct &&
x.Parameter.DirectMember.Id == memberId);
if (directChatWithMember != null)
{
return(directChatWithMember);
}
var directChatModel = await _chatService.CreateDirectChatAsync(memberId).ConfigureAwait(false);
if (directChatModel == null)
{
return(null);
}
var directChatViewModel = _viewModelFactoryService.ResolveViewModel <ChatSummaryViewModel, ChatSummaryModel>(directChatModel);
return(directChatViewModel);
}
private void FindChatForUpdateLastMessage(ChatMessageModel messageModel)
{
ModifyChatsSafely(() =>
{
var chatViewModel = GetChatById(messageModel.ChannelId);
if (chatViewModel != null)
{
chatViewModel.UpdateLastMessage(messageModel);
if (messageModel.IsMine)
{
chatViewModel.UnreadMessageCount = 0;
}
else
{
chatViewModel.UnreadMessageCount++;
}
}
ChatsCollection.Sort((x, y) => y.LastUpdateDate.CompareTo(x.LastUpdateDate));
});
}
public ChatSummaryViewModel GetChatById(string chatId)
{
return(ChatsCollection.FirstOrDefault(x => x.ChatId == chatId));
}
private Task UpdateMessagesCacheAsync()
{
var chatsIds = ChatsCollection.Select(x => x.ChatId).ToList();
return(_messagesCache.PerformFullUpdate(chatsIds));
}
