async Task <int> FetchOldMessages(CancellationToken token)
{
var options = GitterApi.GetNewOptions();
options.Lang = Localisation.LocalCultureInfo.Name;
options.AfterId = "";
if (Messages?.Any() ?? false)
{
options.BeforeId = GetFirstMessageId();
if (!token.IsCancellationRequested)
{
var count = await FetchNewMessages(options, token);
await InvokeAsync(StateHasChanged);
//await Task.Delay(100);
//_ = await JSRuntime.ScrollIntoView(options.BeforeId);
return(count);
}
}
token.ThrowIfCancellationRequested();
return(0);
}
async Task MonitorNewMessages()
{
RoomWatcher.Stop();
if (RoomWatcher.Interval == 250)
{
RoomWatcher.Interval = 2000;
}
var options = GitterApi.GetNewOptions();
options.Lang = Localisation.LocalCultureInfo.Name;
options.AfterId = "";
bool bottom = false;
try
{
bottom = await JSRuntime.IsScrolledToBottom("blgmessagelist");
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
if (Messages?.Any() ?? false)
{
options.AfterId = GetLastMessageId();
}
await FetchNewMessages(options, tokenSource.Token);
if (Messages?.Any() ?? false)
{
if (bottom)
{
_ = await JSRuntime.ScrollIntoView(GetLastMessageId());
}
}
RoomWatcher?.Start();
}
public MessagesViewModel(Room room, IGitterApi api = null, IScreen hostScreen = null)
{
this.HostScreen = hostScreen ?? Locator.Current.GetService <IScreen>();
this.Messages = new ReactiveList <MessageViewModel>();
this.UrlPathSegment = room.name;
IObservable <string> accessToken = GitterApi.GetAccessToken().PublishLast().RefCount();
this.LoadMessages = ReactiveCommand.CreateAsyncObservable(_ => accessToken.SelectMany(token => (api ?? GitterApi.UserInitiated).GetMessages(room.id, token)));
this.Users = new ReactiveList <UserViewModel>();
this.LoadUsers = ReactiveCommand.CreateAsyncObservable(_ => accessToken
.SelectMany(token => (api ?? GitterApi.UserInitiated).GetRoomUsers(room.id, token))
.Select(users => users.OrderBy(user => user.displayName, StringComparer.CurrentCulture).Select(user => new UserViewModel(user))));
this.LoadUsers.Subscribe(x =>
{
using (this.Users.SuppressChangeNotifications())
{
this.Users.Clear();
this.Users.AddRange(x);
}
});
this.SendMessage = ReactiveCommand.CreateAsyncTask(this.WhenAnyValue(x => x.MessageText, x => !String.IsNullOrWhiteSpace(x)), async _ =>
{
await(api ?? GitterApi.UserInitiated).SendMessage(room.id, new SendMessage(this.MessageText), await accessToken);
this.MessageText = String.Empty;
});
this.LoadMessages.FirstAsync().SelectMany(x => x.ToObservable())
.Concat(this.StreamMessages(room.id))
.Select(x => new MessageViewModel(x))
.Subscribe(x =>
{
this.Messages.Insert(0, x);
});
}
internal async Task MarkRead()
{
if (await slim.WaitAsync(1))
{
try
{
if (MessageData.Unread)
{
await Task.Delay(1000);
State.RecordActivity();
if (await GitterApi.MarkChatMessageAsRead(UserId, RoomId, MessageData.Id))
{
MessageData.Unread = false;
}
}
}
catch { }
finally
{
slim.Release();
}
}
}
async Task MonitorNewMessages()
{
RoomWatcher.Stop();
if (RoomWatcher.Interval == 250)
{
RoomWatcher.Interval = 2000;
}
var options = GitterApi.GetNewOptions();
options.Lang = Localisation.LocalCultureInfo.Name;
options.AfterId = "";
//bool bottom = false;
//try
//{
// bottom = await JSRuntime.IsScrolledToBottom("blgmessagelist");
//}
//catch
//{
//}
if (Messages?.Any() ?? false)
{
options.AfterId = GetLastMessageId();
}
await FetchNewMessages(options, tokenSource.Token);
//if (Messages?.Any() ?? false)
//{
// if (bottom)
// {
// _ = await JSRuntime.ScrollIntoView(GetLastMessageId());
// }
//}
RoomWatcher?.Start();
}
private static IObservable <IEnumerable <RoomViewModel> > LoadRoomsImpl(IGitterApi api)
{
return(GitterApi.GetAccessToken()
.SelectMany(api.GetRooms)
.Select(rooms => rooms.OrderBy(room => room.name, StringComparer.CurrentCulture).Select(room => new RoomViewModel(room))));
}
