diff --git a/Utilities/LibMatrix.Utilities.Bot/Services/InviteListenerHostedService.cs b/Utilities/LibMatrix.Utilities.Bot/Services/InviteListenerHostedService.cs
new file mode 100644
index 0000000..7c5cc44
--- /dev/null
+++ b/Utilities/LibMatrix.Utilities.Bot/Services/InviteListenerHostedService.cs
@@ -0,0 +1,86 @@
+using System.Reflection.Metadata;
+using ArcaneLibs.Extensions;
+using LibMatrix.EventTypes.Spec;
+using LibMatrix.Filters;
+using LibMatrix.Helpers;
+using LibMatrix.Homeservers;
+using LibMatrix.Responses;
+using LibMatrix.Utilities.Bot.Interfaces;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace LibMatrix.Utilities.Bot.Services;
+
+public class InviteHandlerHostedService : IHostedService {
+ private readonly AuthenticatedHomeserverGeneric _hs;
+ private readonly ILogger<InviteHandlerHostedService> _logger;
+ private readonly Func<InviteEventArgs, Task> _inviteHandler;
+
+ private Task? _listenerTask;
+
+ public InviteHandlerHostedService(AuthenticatedHomeserverGeneric hs, ILogger<InviteHandlerHostedService> logger,
+ Func<InviteEventArgs, Task> inviteHandler) {
+ logger.LogInformation("{} instantiated!", GetType().Name);
+ _hs = hs;
+ _logger = logger;
+ _inviteHandler = inviteHandler;
+ }
+
+ /// <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 invite listener!");
+ var filter = await _hs.NamedCaches.FilterCache.GetOrSetValueAsync("gay.rory.libmatrix.utilities.bot.command_listener_syncfilter.dev2", new SyncFilter() {
+ AccountData = new SyncFilter.EventFilter(notTypes: ["*"], limit: 1),
+ Presence = new SyncFilter.EventFilter(notTypes: ["*"]),
+ Room = new SyncFilter.RoomFilter() {
+ AccountData = new SyncFilter.RoomFilter.StateFilter(notTypes: ["*"]),
+ Ephemeral = new SyncFilter.RoomFilter.StateFilter(notTypes: ["*"]),
+ State = new SyncFilter.RoomFilter.StateFilter(notTypes: ["*"]),
+ Timeline = new SyncFilter.RoomFilter.StateFilter(types: ["m.room.message"], notSenders: [_hs.WhoAmI.UserId]),
+ }
+ });
+
+ var syncHelper = new SyncHelper(_hs, _logger) {
+ Timeout = 300_000,
+ FilterId = filter
+ };
+ syncHelper.InviteReceivedHandlers.Add(async invite => {
+ _logger.LogInformation("Received invite to room {}", invite.Key);
+
+ var inviteEventArgs = new InviteEventArgs() {
+ RoomId = invite.Key,
+ MemberEvent = invite.Value.InviteState.Events.First(x => x.Type == "m.room.member" && x.StateKey == _hs.WhoAmI.UserId),
+ Homeserver = _hs
+ };
+ await _inviteHandler(inviteEventArgs);
+ });
+
+ await syncHelper.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 async Task StopAsync(CancellationToken cancellationToken) {
+ _logger.LogInformation("Shutting down invite listener!");
+ if (_listenerTask is null) {
+ _logger.LogError("Could not shut down invite listener task because it was null!");
+ return;
+ }
+
+ await _listenerTask.WaitAsync(cancellationToken);
+ }
+
+ public class InviteEventArgs {
+ public string RoomId { get; set; }
+ public StateEventResponse MemberEvent { get; set; }
+ public AuthenticatedHomeserverGeneric Homeserver { get; set; }
+ }
+}
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