From c2579e86ebc5595a2a8d8b65a646411953e568e8 Mon Sep 17 00:00:00 2001
From: MingxuanGame <MingxuanGame@outlook.com>
Date: Sun, 3 Aug 2025 13:50:59 +0000
Subject: [PATCH] feat(multiplayer): supoort manage user (kick, transfer host,
 leave)

---
 app/signalr/hub/multiplayer.py | 116 ++++++++++++++++++++++++++++++++-
 1 file changed, 114 insertions(+), 2 deletions(-)

diff --git a/app/signalr/hub/multiplayer.py b/app/signalr/hub/multiplayer.py
index 21f192c..9350c34 100644
--- a/app/signalr/hub/multiplayer.py
+++ b/app/signalr/hub/multiplayer.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 import asyncio
-from datetime import timedelta
+from datetime import UTC, datetime, timedelta
 from typing import override
 
 from app.database import Room
@@ -33,7 +33,8 @@ from app.models.score import GameMode
 
 from .hub import Client, Hub
 
-from sqlmodel import select
+from sqlalchemy import update
+from sqlmodel import col, select
 from sqlmodel.ext.asyncio.session import AsyncSession
 
 GAMEPLAY_LOAD_TIMEOUT = 30
@@ -627,3 +628,114 @@ class MultiplayerHub(Hub[MultiplayerClientState]):
             "MatchEvent",
             event,
         )
+
+    async def make_user_leave(
+        self,
+        client: Client,
+        room: ServerMultiplayerRoom,
+        user: MultiplayerRoomUser,
+        kicked: bool = False,
+    ):
+        self.remove_from_group(client, self.group_id(room.room.room_id))
+        room.room.users.remove(user)
+
+        if len(room.room.users) == 0:
+            await self.end_room(room)
+        await self.update_room_state(room)
+        if room.room.host and room.room.host.user_id == user.user_id:
+            next_host = room.room.users[0]
+            await self.set_host(room, next_host)
+
+        if kicked:
+            await self.call_noblock(client, "UserKicked", user)
+            await self.broadcast_group_call(
+                self.group_id(room.room.room_id), "UserKicked", user
+            )
+        else:
+            await self.broadcast_group_call(
+                self.group_id(room.room.room_id), "UserLeft", user
+            )
+
+        target_store = self.state.get(user.user_id)
+        if target_store:
+            target_store.room_id = 0
+
+    async def end_room(self, room: ServerMultiplayerRoom):
+        assert room.room.host
+        async with AsyncSession(engine) as session:
+            await session.execute(
+                update(Room)
+                .where(col(Room.id) == room.room.room_id)
+                .values(
+                    name=room.room.settings.name,
+                    ended_at=datetime.now(UTC),
+                    type=room.room.settings.match_type,
+                    queue_mode=room.room.settings.queue_mode,
+                    auto_skip=room.room.settings.auto_skip,
+                    auto_start_duration=int(
+                        room.room.settings.auto_start_duration.total_seconds()
+                    ),
+                    host_id=room.room.host.user_id,
+                )
+            )
+        del self.rooms[room.room.room_id]
+
+    async def LeaveRoom(self, client: Client):
+        store = self.get_or_create_state(client)
+        if store.room_id == 0:
+            return
+        if store.room_id not in self.rooms:
+            raise InvokeException("Room does not exist")
+        server_room = self.rooms[store.room_id]
+        room = server_room.room
+        user = next((u for u in room.users if u.user_id == client.user_id), None)
+        if user is None:
+            raise InvokeException("You are not in this room")
+
+        await self.make_user_leave(client, server_room, user)
+
+    async def KickUser(self, client: Client, user_id: int):
+        store = self.get_or_create_state(client)
+        if store.room_id == 0:
+            raise InvokeException("You are not in a room")
+        if store.room_id not in self.rooms:
+            raise InvokeException("Room does not exist")
+        server_room = self.rooms[store.room_id]
+        room = server_room.room
+
+        if room.host is None or room.host.user_id != client.user_id:
+            raise InvokeException("You are not the host of this room")
+
+        user = next((u for u in room.users if u.user_id == user_id), None)
+        if user is None:
+            raise InvokeException("User not found in this room")
+
+        target_client = self.get_client_by_id(str(user.user_id))
+        if target_client is None:
+            return
+        await self.make_user_leave(target_client, server_room, user, kicked=True)
+
+    async def set_host(self, room: ServerMultiplayerRoom, user: MultiplayerRoomUser):
+        room.room.host = user
+        await self.broadcast_group_call(
+            self.group_id(room.room.room_id),
+            "HostChanged",
+            user.user_id,
+        )
+
+    async def TransferHost(self, client: Client, user_id: int):
+        store = self.get_or_create_state(client)
+        if store.room_id == 0:
+            raise InvokeException("You are not in a room")
+        if store.room_id not in self.rooms:
+            raise InvokeException("Room does not exist")
+        server_room = self.rooms[store.room_id]
+        room = server_room.room
+
+        if room.host is None or room.host.user_id != client.user_id:
+            raise InvokeException("You are not the host of this room")
+
+        new_host = next((u for u in room.users if u.user_id == user_id), None)
+        if new_host is None:
+            raise InvokeException("User not found in this room")
+        await self.set_host(server_room, new_host)