1 files changed, 79 insertions, 0 deletions
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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