private void displayConversation(ContactModel contact)
{
isLoading();
CrossCloudFirestore.Current
.Instance
.GetCollection("contacts")
.GetDocument(contact.id)
.GetCollection("conversations")
.OrderBy("created_at", false)
.AddSnapshotListener(async(snapshot, error) =>
{
conversationsListView.ItemsSource = conversationList;
if (snapshot != null)
{
foreach (var documentChange in snapshot.DocumentChanges)
{
var obj = new ConversationModel
{
id = JsonConvert.DeserializeObject <string>(JsonConvert.SerializeObject(documentChange.Document.Data["id"])),
message = JsonConvert.DeserializeObject <string>(JsonConvert.SerializeObject(documentChange.Document.Data["message"])),
converseeID = JsonConvert.DeserializeObject <string>(JsonConvert.SerializeObject(documentChange.Document.Data["converseeID"])),
created_at = DateTime.UtcNow
};
//var json = JsonConvert.SerializeObject(documentChange.Document.Data);
//var obj = JsonConvert.DeserializeObject<ConversationModel>(json);
switch (documentChange.Type)
{
case DocumentChangeType.Added:
conversationList.Add(obj);
break;
case DocumentChangeType.Modified:
if (conversationList.Where(c => c.id == obj.id).Any())
{
var item = conversationList.Where(c => c.id == obj.id).FirstOrDefault();
item = obj;
}
break;
case DocumentChangeType.Removed:
if (conversationList.Where(c => c.id == obj.id).Any())
{
var item = conversationList.Where(c => c.id == obj.id).FirstOrDefault();
conversationList.Remove(item);
}
break;
}
var conv = conversationsListView.ItemsSource.Cast <object>().LastOrDefault();
conversationsListView.ScrollTo(conv, ScrollToPosition.End, false);
}
}
emptyListLabel.IsVisible = conversationList.Count == 0;
conversationsListView.IsVisible = !(conversationList.Count == 0);
});
stopLoading();
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
bool retVal = false;
if (value != null)
{
ConversationModel conversation = value as ConversationModel;
if (conversation.converseeID.Equals(dataClass.LoggedInUser.Uid))
{
retVal = true;
}
}
return(retVal);
}
async private void sendBtn_Clicked(object sender, EventArgs e)
{
var contact = BindingContext as ContactModel;
string ID = IDGenerator.generateID();
ConversationModel conversation = new ConversationModel()
{
id = ID,
converseeID = dataClass.LoggedInUser.Uid,
message = messageEditor.Text,
created_at = DateTime.UtcNow
};
await CrossCloudFirestore.Current
.Instance
.GetCollection("contacts")
.GetDocument(contact.id)
.GetCollection("conversations")
.GetDocument(ID)
.SetDataAsync(conversation);
messageEditor.Text = "";
}