mcdiscordbot/MinecraftDiscordBot/Program.cs
2022-01-10 16:10:32 +01:00

102 lines
4.6 KiB
C#

using Discord;
using Discord.Rest;
using Discord.WebSocket;
using Fleck;
using Newtonsoft.Json;
using System.Collections.Concurrent;
namespace MinecraftDiscordBot;
public class Program {
private const string WebSocketSource = "WebSocket";
private readonly object _logLock = new();
private readonly DiscordSocketClient _client = new(new() {
LogLevel = LogSeverity.Verbose
});
private readonly WebSocketServer _wssv;
private readonly BotConfiguration _config;
private readonly HashSet<ulong> _whitelistedChannels;
private readonly ConcurrentDictionary<Guid, IWebSocketConnection> _connections = new();
public Program(BotConfiguration config) {
_config = config;
_client.Log += Log;
_client.MessageReceived += MessageReceived;
_wssv = new WebSocketServer($"ws://0.0.0.0:{config.Port}") {
RestartAfterListenError = true
};
_whitelistedChannels = config.Channels.ToHashSet();
}
public static Task<int> Main(string[] args)
=> JsonConvert.DeserializeObject<BotConfiguration>(File.ReadAllText("config.json")) is BotConfiguration config
? new Program(config).RunAsync()
: throw new InvalidProgramException("Configuration file missing!");
public async Task<int> RunAsync() {
_wssv.Start(socket => {
socket.OnOpen = async () => await SocketOpened(socket);
socket.OnClose = async () => await SocketClosed(socket);
socket.OnMessage = async message => await SocketReceived(socket, message);
});
await _client.LoginAsync(TokenType.Bot, _config.Token);
await _client.StartAsync();
await VerifyTextChannels();
// Block this task until the program is closed.
await Task.Delay(-1);
return 0;
}
private async Task VerifyTextChannels() {
var channels = await Task.WhenAll(_whitelistedChannels.Select(id => _client.GetChannelAsync(id).AsTask()).ToArray());
await Task.WhenAll(channels.Where(i => i is ITextChannel { Guild: RestGuild }).Select(i => ((RestGuild)((ITextChannel)i).Guild).UpdateAsync()));
foreach (var channel in channels) {
if (channel is ITextChannel tchannel) Console.WriteLine($"Whitelisted in channel: {channel.Name} [{channel.Id}] on server {tchannel.Guild.Name} [{tchannel.Guild.Id}]");
else throw new InvalidProgramException($"Cannot use this bot on non-text channel {channel.Name} [{channel.Id}]!");
}
}
private async Task SocketReceived(IWebSocketConnection socket, string message)
=> await Log(new LogMessage(LogSeverity.Info, WebSocketSource, $"[{socket.ConnectionInfo.Id}] Received: {message}")).ConfigureAwait(false);
private async Task SocketClosed(IWebSocketConnection socket) {
if (!_connections.TryRemove(socket.ConnectionInfo.Id, out _))
throw new InvalidProgramException("Could not remove non-existing client!");
await Log(new LogMessage(LogSeverity.Info, WebSocketSource, $"[{socket.ConnectionInfo.Id}] Client disconnected!")).ConfigureAwait(false);
}
private async Task SocketOpened(IWebSocketConnection socket) {
if (!_connections.TryAdd(socket.ConnectionInfo.Id, socket))
throw new InvalidProgramException("Could not add already-existing client!");
await Log(new LogMessage(LogSeverity.Info, WebSocketSource, $"[{socket.ConnectionInfo.Id}] Client connected from {socket.ConnectionInfo.ClientIpAddress}:{socket.ConnectionInfo.ClientPort}!")).ConfigureAwait(false);
}
private async Task MessageReceived(SocketMessage arg) {
if (arg.Author.IsBot) return;
if (IsChannelWhitelisted(arg.Channel))
await Log(new LogMessage(LogSeverity.Info, "Discord", $"[{arg.Author.Username}] {arg.Content}")).ConfigureAwait(false);
await SendToAll(JsonConvert.SerializeObject(new TextMessage(arg)));
}
private bool IsChannelWhitelisted(ISocketMessageChannel channel)
=> _whitelistedChannels.Contains(channel.Id);
private async Task SendToAll(string message) {
async Task SendToClient(KeyValuePair<Guid, IWebSocketConnection> cp) {
try {
await cp.Value.Send(message);
} catch (Exception e) {
await Log(new LogMessage(LogSeverity.Warning, WebSocketSource, $"[{cp.Key}] Sending message failed!", e)).ConfigureAwait(false);
}
}
await Task.WhenAll(_connections.Select(SendToClient).ToArray());
}
private async Task Log(LogMessage msg) {
lock (_logLock)
Console.WriteLine(msg.ToString());
await Task.CompletedTask;
}
}