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osu-lazer/osu.Game/Online/Notifications/NotificationsClient.cs
2022-11-21 15:22:57 +09:00

80 lines
2.3 KiB
C#

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using osu.Game.Online.API;
using osu.Game.Online.API.Requests;
using osu.Game.Online.Chat;
namespace osu.Game.Online.Notifications
{
/// <summary>
/// An abstract client which receives notification-related events (chat/notifications).
/// </summary>
public abstract class NotificationsClient : PersistentEndpointClient
{
public Action<Channel>? ChannelJoined;
public Action<Channel>? ChannelParted;
public Action<List<Message>>? NewMessages;
public Action? PresenceReceived;
protected readonly IAPIProvider API;
private long lastMessageId;
protected NotificationsClient(IAPIProvider api)
{
API = api;
}
public override Task ConnectAsync(CancellationToken cancellationToken)
{
API.Queue(CreateInitialFetchRequest(0));
return Task.CompletedTask;
}
protected APIRequest CreateInitialFetchRequest(long? lastMessageId = null)
{
var fetchReq = new GetUpdatesRequest(lastMessageId ?? this.lastMessageId);
fetchReq.Success += updates =>
{
if (updates?.Presence != null)
{
foreach (var channel in updates.Presence)
HandleChannelJoined(channel);
//todo: handle left channels
HandleMessages(updates.Messages);
}
PresenceReceived?.Invoke();
};
return fetchReq;
}
protected void HandleChannelJoined(Channel channel)
{
channel.Joined.Value = true;
ChannelJoined?.Invoke(channel);
}
protected void HandleChannelParted(Channel channel) => ChannelParted?.Invoke(channel);
protected void HandleMessages(List<Message>? messages)
{
if (messages == null)
return;
NewMessages?.Invoke(messages);
lastMessageId = Math.Max(lastMessageId, messages.LastOrDefault()?.Id ?? 0);
}
}
}