diff --git a/Utilities/LibMatrix.HomeserverEmulator/Controllers/Rooms/RoomMembersController.cs b/Utilities/LibMatrix.HomeserverEmulator/Controllers/Rooms/RoomMembersController.cs
new file mode 100644
index 0000000..7d735f7
--- /dev/null
+++ b/Utilities/LibMatrix.HomeserverEmulator/Controllers/Rooms/RoomMembersController.cs
@@ -0,0 +1,79 @@
+using LibMatrix.EventTypes.Spec.State;
+using LibMatrix.HomeserverEmulator.Services;
+using Microsoft.AspNetCore.Mvc;
+
+namespace LibMatrix.HomeserverEmulator.Controllers.Rooms;
+
+[ApiController]
+[Route("/_matrix/client/{version}/rooms/{roomId}/")]
+public class RoomMembersController(
+ ILogger<RoomMembersController> logger,
+ TokenService tokenService,
+ UserStore userStore,
+ RoomStore roomStore,
+ PaginationTokenResolverService paginationTokenResolver) : ControllerBase {
+ [HttpGet("members")]
+ public async Task<List<StateEventResponse>> GetMembers(string roomId, string? at = null, string? membership = null, string? not_membership = null) {
+ var token = tokenService.GetAccessTokenOrNull(HttpContext);
+ if (token == null)
+ throw new MatrixException() {
+ ErrorCode = "M_MISSING_TOKEN",
+ Error = "Missing token"
+ };
+
+ var user = await userStore.GetUserByToken(token);
+ if (user == null)
+ throw new MatrixException() {
+ ErrorCode = "M_UNKNOWN_TOKEN",
+ Error = "No such user"
+ };
+
+ var room = roomStore.GetRoomById(roomId);
+ if (room == null)
+ throw new MatrixException() {
+ ErrorCode = "M_NOT_FOUND",
+ Error = "Room not found"
+ };
+
+ var members = room.Timeline.Where(x => x.Type == "m.room.member" && x.StateKey != null).ToList();
+
+ if (membership != null)
+ members = members.Where(x => (x.TypedContent as RoomMemberEventContent)?.Membership == membership).ToList();
+
+ if (not_membership != null)
+ members = members.Where(x => (x.TypedContent as RoomMemberEventContent)?.Membership != not_membership).ToList();
+
+ if (at != null) {
+ StateEventResponse? evt = null;
+ if (at.StartsWith('$'))
+ evt = await paginationTokenResolver.ResolveTokenToEvent(at, room);
+
+ if (evt is null) {
+ var time = await paginationTokenResolver.ResolveTokenToTimestamp(at);
+ evt = room.Timeline.LastOrDefault(x => x.OriginServerTs <= time);
+ if (evt is null) {
+ logger.LogWarning("Sent empty list of members for room {roomId} at {at}, because there were no events at this time!", roomId, at);
+ return [];
+ }
+ }
+ else if (!room.Timeline.Contains(evt)) {
+ evt = room.Timeline.LastOrDefault(x => x.OriginServerTs <= evt.OriginServerTs);
+ if (evt is null) {
+ logger.LogWarning("Sent empty list of members for room {roomId} at {at}, because there were no events at this time!", roomId, at);
+ return [];
+ }
+ }
+
+ // evt = room.Timeline.FirstOrDefault(x => x.EventId == at);
+ if (evt == null)
+ throw new MatrixException() {
+ ErrorCode = "M_NOT_FOUND",
+ Error = "Event not found"
+ };
+
+ members = members.Where(x => x.OriginServerTs <= evt.OriginServerTs).ToList();
+ }
+
+ return members;
+ }
+}
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