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using LibMatrix.EventTypes.Spec;
using LibMatrix.Helpers;
using LibMatrix.Homeservers;
using LibMatrix.Utilities.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!");
var syncHelper = new SyncHelper(_hs);
syncHelper.TimelineEventHandlers.Add(async @event => {
try {
var room = _hs.GetRoom(@event.RoomId);
// _logger.LogInformation(eventResponse.ToJson(indent: false));
if (@event is { Type: "m.room.message", TypedContent: RoomMessageEventContent 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(
new RoomMessageEventContent(messageType: "m.notice", body: "Command not found!"));
return;
}
var ctx = new CommandContext {
Room = room,
MessageEvent = @event,
Homeserver = _hs
};
if (await command.CanInvoke(ctx)) {
try {
await command.Invoke(ctx);
}
catch (Exception e) {
await room.SendMessageEventAsync(
MessageFormatter.FormatException("An error occurred during the execution of this command", e));
}
}
else {
await room.SendMessageEventAsync(
new RoomMessageEventContent(messageType: "m.notice", body: "You do not have permission to run this command!"));
}
}
}
}
}
catch (Exception e) {
_logger.LogError(e, "Error in command listener!");
}
});
await new SyncHelper(_hs){Timeout = 2500}.RunSyncLoopAsync(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;
}
}
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