Basic Operation working

.gitignore

@@ -3,6 +3,8 @@
 ##
 ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
 
+MinecraftDiscordBot/config.json
+
 # User-specific files
 *.rsuser
 *.suo

MinecraftDiscordBot.sln

@@ -3,7 +3,13 @@ Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
 VisualStudioVersion = 17.1.32104.313
 MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MinecraftDiscordBot", "MinecraftDiscordBot\MinecraftDiscordBot.csproj", "{46DBB810-17C0-45E9-BD39-2EE3FE101AC7}"
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{CE65C879-794A-4695-B659-7376FE7DB5E3}"
+	ProjectSection(SolutionItems) = preProject
+		.gitignore = .gitignore
+		MinecraftDiscordBot\bin\Debug\net6.0\config.json = MinecraftDiscordBot\bin\Debug\net6.0\config.json
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MinecraftDiscordBot", "MinecraftDiscordBot\MinecraftDiscordBot.csproj", "{7A4A00B4-FDD1-461E-B925-1A7F1B185C4A}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -11,10 +17,10 @@ Global
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{46DBB810-17C0-45E9-BD39-2EE3FE101AC7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7A4A00B4-FDD1-461E-B925-1A7F1B185C4A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{46DBB810-17C0-45E9-BD39-2EE3FE101AC7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7A4A00B4-FDD1-461E-B925-1A7F1B185C4A}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{46DBB810-17C0-45E9-BD39-2EE3FE101AC7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7A4A00B4-FDD1-461E-B925-1A7F1B185C4A}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{46DBB810-17C0-45E9-BD39-2EE3FE101AC7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7A4A00B4-FDD1-461E-B925-1A7F1B185C4A}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

MinecraftDiscordBot/BotConfiguration.cs

@@ -0,0 +1,12 @@
+using Newtonsoft.Json;
+
+namespace MinecraftDiscordBot;
+
+public class BotConfiguration {
+    [JsonProperty("token", Required = Required.Always)]
+    public string Token { get; set; } = default!;
+    [JsonProperty("port", Required = Required.Always)]
+    public int Port { get; set; } = default!;
+    [JsonProperty("channels", Required = Required.Always)]
+    public IEnumerable<ulong> Channels { get; set; } = default!;
+}

MinecraftDiscordBot/Dockerfile

@@ -1,8 +1,7 @@
 #See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
 
-FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
+FROM mcr.microsoft.com/dotnet/runtime:6.0 AS base
 WORKDIR /app
-EXPOSE 80
 
 FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
 WORKDIR /src

MinecraftDiscordBot/Message.cs

@@ -0,0 +1,21 @@
+using Discord.WebSocket;
+using Newtonsoft.Json;
+
+namespace MinecraftDiscordBot;
+
+public abstract class Message {
+    [JsonProperty("type")]
+    public abstract string Type { get; }
+}
+public class TextMessage : Message {
+    public TextMessage(SocketMessage arg) : this(arg.Author.Username, arg.Content) { }
+    public TextMessage(string author, string content) {
+        Author = author;
+        Content = content;
+    }
+    public override string Type => "text";
+    [JsonProperty("author")]
+    public string Author { get; }
+    [JsonProperty("message")]
+    public string Content { get; }
+}

MinecraftDiscordBot/MinecraftDiscordBot.csproj

@@ -1,14 +1,18 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
+    <OutputType>Exe</OutputType>
     <TargetFramework>net6.0</TargetFramework>
-    <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
     <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Discord.Net" Version="3.1.0" />
+    <PackageReference Include="Fleck" Version="1.2.0" />
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.14.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
 
 </Project>

MinecraftDiscordBot/Program.cs

@@ -1,6 +1,101 @@
-var builder = WebApplication.CreateBuilder(args);
+using Discord;
-var app = builder.Build();
+using Discord.Rest;
+using Discord.WebSocket;
+using Fleck;
+using Newtonsoft.Json;
+using System.Collections.Concurrent;
 
-app.MapGet("/", () => "Hello World!");
+namespace MinecraftDiscordBot;
 
-app.Run();
+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;
+    }
+}

MinecraftDiscordBot/Properties/launchSettings.json

@@ -1,34 +1,10 @@
 {
-  "iisSettings": {
-    "windowsAuthentication": false,
-    "anonymousAuthentication": true,
-    "iisExpress": {
-      "applicationUrl": "http://localhost:25710",
-      "sslPort": 0
-    }
-  },
   "profiles": {
     "MinecraftDiscordBot": {
-      "commandName": "Project",
+      "commandName": "Project"
-      "launchBrowser": true,
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      },
-      "applicationUrl": "http://localhost:5114",
-      "dotnetRunMessages": true
-    },
-    "IIS Express": {
-      "commandName": "IISExpress",
-      "launchBrowser": true,
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
     },
     "Docker": {
-      "commandName": "Docker",
+      "commandName": "Docker"
-      "launchBrowser": true,
-      "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}",
-      "publishAllPorts": true
     }
   }
 }

MinecraftDiscordBot/appsettings.Development.json

@@ -1,8 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  }
-}

MinecraftDiscordBot/appsettings.json

@@ -1,9 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  },
-  "AllowedHosts": "*"
-}