9 files changed, 177 insertions, 7 deletions
diff --git a/Utilities/LibMatrix.Utilities.Bot/BotCommandInstaller.cs b/Utilities/LibMatrix.Utilities.Bot/BotCommandInstaller.cs
new file mode 100644
index 0000000..42cdb6c
--- /dev/null
+++ b/Utilities/LibMatrix.Utilities.Bot/BotCommandInstaller.cs
@@ -0,0 +1,44 @@
+using ArcaneLibs;
+using ArcaneLibs.Extensions;
+using LibMatrix.Helpers;
+using LibMatrix.Homeservers;
+using LibMatrix.Services;
+using LibMatrix.StateEventTypes.Spec;
+using LibMatrix.Utilities.Bot.Services;
+using MediaModeratorPoC.Bot.Interfaces;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace LibMatrix.Utilities.Bot;
+
+public static class BotCommandInstaller {
+    public static IServiceCollection AddBotCommands(this IServiceCollection services) {
+        foreach (var commandClass in new ClassCollector<ICommand>().ResolveFromAllAccessibleAssemblies()) {
+            Console.WriteLine($"Adding command {commandClass.Name}");
+            services.AddScoped(typeof(ICommand), commandClass);
+        }
+
+        return services;
+    }
+
+    public static IServiceCollection AddBot(this IServiceCollection services, bool withCommands = true) {
+        services.AddSingleton<LibMatrixBotConfiguration>();
+
+        services.AddScoped<AuthenticatedHomeserverGeneric>(x => {
+            var config = x.GetService<LibMatrixBotConfiguration>();
+            var hsProvider = x.GetService<HomeserverProviderService>();
+            var hs = hsProvider.GetAuthenticatedWithToken(config.Homeserver, config.AccessToken).Result;
+
+            return hs;
+        });
+
+        if (withCommands) {
+            Console.WriteLine("Adding command handler...");
+            services.AddBotCommands();
+            services.AddHostedService<CommandListenerHostedService>();
+            // services.AddSingleton<IHostedService, CommandListenerHostedService>();
+        }
+        return services;
+    }
+}
diff --git a/ExampleBots/MediaModeratorPoC/Bot/Commands/HelpCommand.cs b/Utilities/LibMatrix.Utilities.Bot/Commands/HelpCommand.cs
index 8d63daa..c975c8b 100644
--- a/ExampleBots/MediaModeratorPoC/Bot/Commands/HelpCommand.cs
+++ b/Utilities/LibMatrix.Utilities.Bot/Commands/HelpCommand.cs
@@ -17,9 +17,6 @@ public class HelpCommand(IServiceProvider services) : ICommand {
             sb.AppendLine($"- {command.Name}: {command.Description}");
         }
 
-        await ctx.Room.SendMessageEventAsync("m.room.message", new RoomMessageEventData {
-            MessageType = "m.notice",
-            Body = sb.ToString()
-        });
+        await ctx.Room.SendMessageEventAsync("m.room.message", new RoomMessageEventData(messageType: "m.notice", body: sb.ToString()));
     }
 }
diff --git a/ExampleBots/MediaModeratorPoC/Bot/Commands/PingCommand.cs b/Utilities/LibMatrix.Utilities.Bot/Commands/PingCommand.cs
index f9f46c2..e7f3b10 100644
--- a/ExampleBots/MediaModeratorPoC/Bot/Commands/PingCommand.cs
+++ b/Utilities/LibMatrix.Utilities.Bot/Commands/PingCommand.cs
@@ -8,8 +8,6 @@ public class PingCommand : ICommand {
     public string Description { get; } = "Pong!";
 
     public async Task Invoke(CommandContext ctx) {
-        await ctx.Room.SendMessageEventAsync("m.room.message", new RoomMessageEventData {
-            Body = "pong!"
-        });
+        await ctx.Room.SendMessageEventAsync("m.room.message", new RoomMessageEventData(body: "pong!"));
     }
 }
diff --git a/ExampleBots/MediaModeratorPoC/Bot/FileStorageProvider.cs b/Utilities/LibMatrix.Utilities.Bot/FileStorageProvider.cs
index d5b991a..d5b991a 100644
--- a/ExampleBots/MediaModeratorPoC/Bot/FileStorageProvider.cs
+++ b/Utilities/LibMatrix.Utilities.Bot/FileStorageProvider.cs
diff --git a/Utilities/LibMatrix.Utilities.Bot/Interfaces/CommandContext.cs b/Utilities/LibMatrix.Utilities.Bot/Interfaces/CommandContext.cs
new file mode 100644
index 0000000..0ad3e09
--- /dev/null
+++ b/Utilities/LibMatrix.Utilities.Bot/Interfaces/CommandContext.cs
@@ -0,0 +1,21 @@
+using LibMatrix.Homeservers;
+using LibMatrix.Responses;
+using LibMatrix.RoomTypes;
+using LibMatrix.StateEventTypes.Spec;
+
+namespace MediaModeratorPoC.Bot.Interfaces;
+
+public class CommandContext {
+    public GenericRoom Room { get; set; }
+    public StateEventResponse MessageEvent { get; set; }
+
+    public string MessageContentWithoutReply =>
+        (MessageEvent.TypedContent as RoomMessageEventData)!
+        .Body.Split('\n')
+        .SkipWhile(x => x.StartsWith(">"))
+        .Aggregate((x, y) => $"{x}\n{y}");
+
+    public string CommandName => MessageContentWithoutReply.Split(' ')[0][1..];
+    public string[] Args => MessageContentWithoutReply.Split(' ')[1..];
+    public AuthenticatedHomeserverGeneric Homeserver { get; set; }
+}
diff --git a/ExampleBots/MediaModeratorPoC/Bot/Interfaces/ICommand.cs b/Utilities/LibMatrix.Utilities.Bot/Interfaces/ICommand.cs
index a8fce94..a8fce94 100644
--- a/ExampleBots/MediaModeratorPoC/Bot/Interfaces/ICommand.cs
+++ b/Utilities/LibMatrix.Utilities.Bot/Interfaces/ICommand.cs
diff --git a/Utilities/LibMatrix.Utilities.Bot/LibMatrix.Utilities.Bot.csproj b/Utilities/LibMatrix.Utilities.Bot/LibMatrix.Utilities.Bot.csproj
new file mode 100644
index 0000000..db6570d
--- /dev/null
+++ b/Utilities/LibMatrix.Utilities.Bot/LibMatrix.Utilities.Bot.csproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net7.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <LangVersion>preview</LangVersion>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\LibMatrix\LibMatrix.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="7.0.0" />
+        <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.1" />
+    </ItemGroup>
+
+
+</Project>
diff --git a/Utilities/LibMatrix.Utilities.Bot/LibMatrixBotConfiguration.cs b/Utilities/LibMatrix.Utilities.Bot/LibMatrixBotConfiguration.cs
new file mode 100644
index 0000000..118b4df
--- /dev/null
+++ b/Utilities/LibMatrix.Utilities.Bot/LibMatrixBotConfiguration.cs
@@ -0,0 +1,10 @@
+using Microsoft.Extensions.Configuration;
+
+namespace LibMatrix.Utilities.Bot;
+
+public class LibMatrixBotConfiguration {
+    public LibMatrixBotConfiguration(IConfiguration config) => config.GetRequiredSection("LibMatrixBot").Bind(this);
+    public string Homeserver { get; set; } = "";
+    public string AccessToken { get; set; } = "";
+    public string Prefix { get; set; } = "?";
+}
diff --git a/Utilities/LibMatrix.Utilities.Bot/Services/CommandListenerHostedService.cs b/Utilities/LibMatrix.Utilities.Bot/Services/CommandListenerHostedService.cs
new file mode 100644
index 0000000..d5e7dd6
--- /dev/null
+++ b/Utilities/LibMatrix.Utilities.Bot/Services/CommandListenerHostedService.cs
@@ -0,0 +1,79 @@
+using LibMatrix.Homeservers;
+using LibMatrix.StateEventTypes.Spec;
+using MediaModeratorPoC.Bot.Interfaces;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace LibMatrix.Utilities.Bot.Services;
+
+public class CommandListenerHostedService : IHostedService {
+    private readonly AuthenticatedHomeserverGeneric _hs;
+    private readonly ILogger<CommandListenerHostedService> _logger;
+    private readonly IEnumerable<ICommand> _commands;
+    private readonly LibMatrixBotConfiguration _config;
+
+    private Task? _listenerTask;
+
+    public CommandListenerHostedService(AuthenticatedHomeserverGeneric hs, ILogger<CommandListenerHostedService> logger, IServiceProvider services,
+        LibMatrixBotConfiguration config) {
+        logger.LogInformation("{} instantiated!", this.GetType().Name);
+        _hs = hs;
+        _logger = logger;
+        _config = config;
+        _logger.LogInformation("Getting commands...");
+        _commands = services.GetServices<ICommand>();
+        _logger.LogInformation("Got {} commands!", _commands.Count());
+    }
+
+    /// <summary>Triggered when the application host is ready to start the service.</summary>
+    /// <param name="cancellationToken">Indicates that the start process has been aborted.</param>
+    public Task StartAsync(CancellationToken cancellationToken) {
+        _listenerTask = Run(cancellationToken);
+        _logger.LogInformation("Command listener started (StartAsync)!");
+        return Task.CompletedTask;
+    }
+
+    private async Task? Run(CancellationToken cancellationToken) {
+        _logger.LogInformation("Starting command listener!");
+        _hs.SyncHelper.TimelineEventHandlers.Add(async @event => {
+            var room = await _hs.GetRoom(@event.RoomId);
+            // _logger.LogInformation(eventResponse.ToJson(indent: false));
+            if (@event is { Type: "m.room.message", TypedContent: RoomMessageEventData message }) {
+                if (message is { MessageType: "m.text" }) {
+                    var messageContentWithoutReply = message.Body.Split('\n', StringSplitOptions.RemoveEmptyEntries).SkipWhile(x=>x.StartsWith(">")).Aggregate((x, y) => $"{x}\n{y}");
+                    if (messageContentWithoutReply.StartsWith(_config.Prefix)) {
+                        var command = _commands.FirstOrDefault(x => x.Name == messageContentWithoutReply.Split(' ')[0][_config.Prefix.Length..]);
+                        if (command == null) {
+                            await room.SendMessageEventAsync("m.room.message",
+                                new RoomMessageEventData(messageType: "m.notice", body: "Command not found!"));
+                            return;
+                        }
+
+                        var ctx = new CommandContext {
+                            Room = room,
+                            MessageEvent = @event,
+                            Homeserver = _hs
+                        };
+                        if (await command.CanInvoke(ctx)) {
+                            await command.Invoke(ctx);
+                        }
+                        else {
+                            await room.SendMessageEventAsync("m.room.message",
+                                new RoomMessageEventData(messageType: "m.notice", body: "You do not have permission to run this command!"));
+                        }
+                    }
+                }
+            }
+        });
+        await _hs.SyncHelper.RunSyncLoop(cancellationToken: cancellationToken);
+    }
+
+    /// <summary>Triggered when the application host is performing a graceful shutdown.</summary>
+    /// <param name="cancellationToken">Indicates that the shutdown process should no longer be graceful.</param>
+    public Task StopAsync(CancellationToken cancellationToken) {
+        _logger.LogInformation("Shutting down command listener!");
+        _listenerTask.Wait(cancellationToken);
+        return Task.CompletedTask;
+    }
+}