pair notification method + dto

LightlessSyncAPI/Dto/User/UserPairNotificationDto.cs

@@ -0,0 +1,10 @@
+using MessagePack;
+
+namespace LightlessSync.API.Dto.User;
+
+[MessagePackObject(keyAsPropertyName: true)]
+public sealed class UserPairNotificationDto
+{
+    public required string myHashedCid { get; init; }
+    public required string message { get; init; }
+}

LightlessSyncAPI/SignalR/ILightlessHub.cs

@@ -24,6 +24,7 @@ public interface ILightlessHub
     Task Client_GroupSendProfile (GroupProfileDto groupInfo);
     Task Client_GroupSendInfo(GroupInfoDto groupInfo);
     Task Client_ReceiveServerMessage(MessageSeverity messageSeverity, string message);
+    Task Client_ReceiveBroadcastPairRequest(UserPairNotificationDto dto);
     Task Client_UpdateSystemInfo(SystemInfoDto systemInfo);
     Task Client_UserAddClientPair(UserPairDto dto);
     Task Client_UserReceiveCharacterData(OnlineUserCharaDataDto dataDto);
@@ -74,7 +75,7 @@ public interface ILightlessHub
     Task<bool> SetGroupBroadcastStatus(GroupBroadcastRequestDto dto);
     Task<List<GroupJoinDto>> GetBroadcastedGroups(List<BroadcastStatusInfoDto> broadcastEntries);
     Task<BroadcastStatusInfoDto?> IsUserBroadcasting(string hashedCid);
-    Task<BroadcastStatusBatchDto> AreUsersBroadcasting(List<string> hashedCids);
+    Task<BroadcastStatusBatchDto?> AreUsersBroadcasting(List<string> hashedCids);
     Task<TimeSpan?> GetBroadcastTtl(string hashedCid);
 
     Task UserDelete();
@@ -103,4 +104,4 @@ public interface ILightlessHub
     Task GposeLobbyPushCharacterData(CharaDataDownloadDto charaDownloadDto);
     Task GposeLobbyPushPoseData(PoseData poseData);
     Task GposeLobbyPushWorldData(WorldData worldData);
-}
+}