/// <summary>
///
/// </summary>
/// <param name="id"></param>
/// <param name="isConference"></param>
/// <returns></returns>
public ChatViewModel GetChatViewModel(int id, bool isConference)
{
_currentChatId = id;
_isCurrentConference = isConference;
try
{
var currentMessages = _messagesCache.GetItems(id);
string title = EntitiesHelpers.GetChatTitle(id, isConference);
// Load only 30 first from cache.
int finish = currentMessages.Count - MESSAGES_COUNT;
if (finish < 0)
finish = 0;
int count = MESSAGES_COUNT;
if (currentMessages.Count < count)
count = currentMessages.Count;
var filtered = new Message[count];// new List<Message>(MESSAGES_COUNT);
for (int i = currentMessages.Count - 1, j = count - 1; i >= finish; i--, j--)
filtered[j] = currentMessages[i];
_currentChatViewModel = new ChatViewModel(id, title, isConference, filtered, _imageCache);
if (!currentMessages.Any()) // Get messages only first time for this chat.
{
MessagesGet getMessages = null;
if (isConference)
getMessages = new MessagesGet(-1, id, 0, MESSAGES_COUNT, _UpdateCurrentMessagesList);
else
getMessages = new MessagesGet(id, -1, 0, MESSAGES_COUNT, _UpdateCurrentMessagesList);
getMessages.Execute();
}
else
_UpdateReadStatusOfMessages(currentMessages); // This method will be called in _UpdateCurrentMessagesList
_currentChatViewModel.UpdateStatusInfo();
}
catch (Exception ex)
{
Debug.WriteLine("GetChatViewModel failed: " + ex.Message);
}
return _currentChatViewModel;
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
string id = string.Empty;
string title = string.Empty;
_UpdateApplicationBar();
try
{
if (NavigationContext.QueryString.TryGetValue("id", out id))
{
_id = Convert.ToInt32(id);
_model = App.Current.EntityService.GetChatViewModel(_id, true);
// After chat creating it should be manually set.
if (NavigationContext.QueryString.TryGetValue("title", out title))
_model.Name = title;
this.DataContext = (object)_model;
_ScrollIntoView();
_model.Messages.CollectionChanged += Messages_CollectionChanged;
}
}
catch (Exception ex)
{
Debug.WriteLine("OnNavigatedTo in GroupChatPage failed: " + ex.Message);
}
}
public void CloseCurrentChat()
{
_currentChatId = -1;
_currentChatViewModel = null;
}