/// <summary>
/// Отображает или убирает кнопку "Вниз"
/// </summary>
/// <param name="isVisible"></param>
public async void ShowButtonToBottomAsync(bool isVisible)
{
IsFocus = false;
if (_cache.IndexLevel == 0 && CountNewMessages == 0 && !_haveNewMessage)
{
IsVisibleButtonToBottom = isVisible;
await Task.Run(() => _serverWorker.GetUpdate(!IsVisibleButtonToBottom));
if (IsVisibleButtonToBottom)
{
GetFlickerAsync();
}
else
{
CountNewMessages = 0;
}
_countClickButtonToBottom = 0;
IsFocus = true;
}
else if (_cache.IndexLevel > 0 && _isGoToBottom == false)
{
_isGoToBottom = true;
Application.Current.Dispatcher.Invoke(LoadFromCache, DispatcherPriority.Background);
_countClickButtonToBottom = 0;
IsFocus = true;
}
else if (_cache.IndexLevel > 0)
{
_isGoToBottom = false;
IsFocus = true;
}
else if (CountNewMessages > 0 && _isGoToBottom == false)
{
if (CountNewMessages > 100)
{
await Task.Run(() => _serverWorker.GetMessages(Messages[Messages.Count - 1].Id, "New messages"));
}
else
{
CountNewMessages = 0;
var mapper = new MapperConfiguration(cfg => cfg.CreateMap <Message, ChatMessageDTO>()).CreateMapper();
await Task.Run(() => _serverWorker.GetMessages(mapper.Map <Message, ChatMessageDTO>(MessagesContainer.GetMessage())));
}
_countClickButtonToBottom = 0;
}
else
{
_isGoToBottom = false;
}
}