mirror of https://github.com/ppy/osu
106 lines
3.2 KiB
C#
106 lines
3.2 KiB
C#
// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using Newtonsoft.Json;
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using osu.Framework.Configuration;
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using osu.Framework.Lists;
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namespace osu.Game.Online.Chat
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{
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public class Channel
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{
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[JsonProperty(@"name")]
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public string Name;
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[JsonProperty(@"description")]
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public string Topic;
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[JsonProperty(@"type")]
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public string Type;
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[JsonProperty(@"channel_id")]
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public int Id;
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public readonly SortedList<Message> Messages = new SortedList<Message>(Comparer<Message>.Default);
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private readonly List<LocalEchoMessage> pendingMessages = new List<LocalEchoMessage>();
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public Bindable<bool> Joined = new Bindable<bool>();
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public bool ReadOnly => false;
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public const int MAX_HISTORY = 300;
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[JsonConstructor]
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public Channel()
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{
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}
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public event Action<IEnumerable<Message>> NewMessagesArrived;
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public event Action<LocalEchoMessage, Message> PendingMessageResolved;
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public event Action<Message> MessageRemoved;
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public void AddLocalEcho(LocalEchoMessage message)
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{
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pendingMessages.Add(message);
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Messages.Add(message);
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NewMessagesArrived?.Invoke(new[] { message });
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}
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public void AddNewMessages(params Message[] messages)
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{
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messages = messages.Except(Messages).ToArray();
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Messages.AddRange(messages);
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purgeOldMessages();
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NewMessagesArrived?.Invoke(messages);
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}
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private void purgeOldMessages()
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{
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// never purge local echos
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int messageCount = Messages.Count - pendingMessages.Count;
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if (messageCount > MAX_HISTORY)
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Messages.RemoveRange(0, messageCount - MAX_HISTORY);
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}
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/// <summary>
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/// Replace or remove a message from the channel.
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/// </summary>
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/// <param name="echo">The local echo message (client-side).</param>
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/// <param name="final">The response message, or null if the message became invalid.</param>
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public void ReplaceMessage(LocalEchoMessage echo, Message final)
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{
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if (!pendingMessages.Remove(echo))
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throw new InvalidOperationException("Attempted to remove echo that wasn't present");
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Messages.Remove(echo);
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if (final == null)
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{
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MessageRemoved?.Invoke(echo);
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return;
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}
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if (Messages.Contains(final))
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{
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// message already inserted, so let's throw away this update.
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// we may want to handle this better in the future, but for the time being api requests are single-threaded so order is assumed.
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MessageRemoved?.Invoke(echo);
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return;
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}
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Messages.Add(final);
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PendingMessageResolved?.Invoke(echo, final);
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}
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public override string ToString() => Name;
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}
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}
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