1 files changed, 83 insertions, 0 deletions
diff --git a/MatrixRoomUtils.LibDMSpace/DMSpaceRoom.cs b/MatrixRoomUtils.LibDMSpace/DMSpaceRoom.cs
new file mode 100644
index 0000000..247ace8
--- /dev/null
+++ b/MatrixRoomUtils.LibDMSpace/DMSpaceRoom.cs
@@ -0,0 +1,83 @@
+using ArcaneLibs.Extensions;
+using LibMatrix;
+using LibMatrix.Homeservers;
+using LibMatrix.RoomTypes;
+using MatrixRoomUtils.LibDMSpace.StateEvents;
+
+namespace MatrixRoomUtils.LibDMSpace;
+
+public class DMSpaceRoom(AuthenticatedHomeserverGeneric homeserver, string roomId) : SpaceRoom(homeserver, roomId) {
+    private readonly GenericRoom _room;
+
+    public async Task<DMSpaceInfo?> GetDmSpaceInfo() {
+        return await GetStateOrNullAsync<DMSpaceInfo>(DMSpaceInfo.EventId);
+    }
+
+    public async IAsyncEnumerable<GenericRoom> GetChildrenAsync(bool includeRemoved = false) {
+        var rooms = new List<GenericRoom>();
+        var state = GetFullStateAsync();
+        await foreach (var stateEvent in state) {
+            if (stateEvent!.Type != "m.space.child") continue;
+            if (stateEvent.RawContent!.ToJson() != "{}" || includeRemoved)
+                yield return homeserver.GetRoom(stateEvent.StateKey);
+        }
+    }
+
+    public async Task<EventIdResponse> AddChildAsync(GenericRoom room) {
+        var members = room.GetMembersAsync(true);
+        Dictionary<string, int> memberCountByHs = new();
+        await foreach (var member in members) {
+            var server = member.StateKey.Split(':')[1];
+            if (memberCountByHs.ContainsKey(server)) memberCountByHs[server]++;
+            else memberCountByHs[server] = 1;
+        }
+
+        var resp = await SendStateEventAsync("m.space.child", room.RoomId, new {
+            via = memberCountByHs
+                .OrderByDescending(x => x.Value)
+                .Select(x => x.Key)
+                .Take(10)
+        });
+        return resp;
+    }
+
+    public async Task ImportNativeDMs() {
+        var dmSpaceInfo = await GetDmSpaceInfo();
+        if (dmSpaceInfo is null) throw new NullReferenceException("DM Space is not configured!");
+        if (dmSpaceInfo.LayerByUser)
+            await ImportNativeDMsIntoLayers();
+        else await ImportNativeDMsWithoutLayers();
+    }
+
+#region Import Native DMs
+
+    private async Task ImportNativeDMsWithoutLayers() {
+        var mdirect = await homeserver.GetAccountDataAsync<Dictionary<string, List<string>>>("m.direct");
+        foreach (var (userId, dmRooms) in mdirect) {
+            foreach (var roomid in dmRooms) {
+                var dri = new DMRoomInfo() {
+                    RemoteUsers = new() {
+                        userId
+                    }
+                };
+                // Add all DM room members
+                var members = homeserver.GetRoom(roomid).GetMembersAsync();
+                await foreach (var member in members)
+                    if (member.StateKey != userId)
+                        dri.RemoteUsers.Add(member.StateKey);
+                // Remove members of DM space
+                members = GetMembersAsync();
+                await foreach (var member in members)
+                    if (dri.RemoteUsers.Contains(member.StateKey))
+                        dri.RemoteUsers.Remove(member.StateKey);
+                await SendStateEventAsync(DMRoomInfo.EventId, roomid, dri);
+            }
+        }
+    }
+
+    private async Task ImportNativeDMsIntoLayers() {
+        var mdirect = await homeserver.GetAccountDataAsync<Dictionary<string, List<string>>>("m.direct");
+    }
+
+#endregion
+}
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