fix(avatar): preserve ownership across Huihui environments

digital-avatar-app/backend/routers/huihui_auth.py

@@ -27,7 +27,7 @@ from sqlalchemy.orm import Session
 _CN_TZ = timezone(timedelta(hours=8))
 
 from database import get_db
-from models import User
+from models import Avatar, TakeoverCursor, TakeoverMessage, TakeoverReplyTask, User
 from responses import ok, fail
 
 router = APIRouter(tags=["会会账号"])
@@ -281,12 +281,61 @@ def pwd_login(body: dict = Body(...), db: Session = Depends(get_db)):
     })
 
 
+def _transfer_avatar_ownership(db: Session, old_owner_id: str, new_owner_id: str) -> int:
+    """Move one user's avatar-owned data to a replacement Huihui identity."""
+    if not old_owner_id or old_owner_id == new_owner_id:
+        return 0
+
+    avatar_ids = [
+        avatar_id
+        for (avatar_id,) in db.query(Avatar.id).filter(Avatar.owner_id == old_owner_id).all()
+    ]
+    if not avatar_ids:
+        return 0
+
+    db.query(Avatar).filter(Avatar.id.in_(avatar_ids)).update(
+        {Avatar.owner_id: new_owner_id}, synchronize_session="fetch"
+    )
+    for model in (TakeoverCursor, TakeoverMessage, TakeoverReplyTask):
+        db.query(model).filter(model.avatar_id.in_(avatar_ids)).update(
+            {model.owner_id: new_owner_id}, synchronize_session="fetch"
+        )
+    return len(avatar_ids)
+
+
+def _find_or_link_user(db: Session, phone: str, huihui_user_id: str) -> User:
+    """Resolve an account and safely retain avatars across Huihui environments."""
+    user = db.query(User).filter(User.huihui_user_id == huihui_user_id).first()
+    if not phone:
+        return user or User(huihui_user_id=huihui_user_id)
+
+    same_phone_users = db.query(User).filter(User.phone == phone).all()
+
+    if user is None:
+        # A unique verified-phone match is the same person whose upstream ID changed.
+        if len(same_phone_users) == 1:
+            user = same_phone_users[0]
+            old_owner_id = user.huihui_user_id
+            _transfer_avatar_ownership(db, old_owner_id, huihui_user_id)
+            user.huihui_user_id = huihui_user_id
+            return user
+        return User(huihui_user_id=huihui_user_id)
+
+    legacy_users = [candidate for candidate in same_phone_users if candidate.id != user.id]
+    current_avatar_count = db.query(Avatar).filter(Avatar.owner_id == huihui_user_id).count()
+    if len(legacy_users) == 1 and current_avatar_count == 0:
+        legacy_user = legacy_users[0]
+        _transfer_avatar_ownership(db, legacy_user.huihui_user_id, huihui_user_id)
+        legacy_user.app_token = ""
+        legacy_user.huihui_token = ""
+        db.add(legacy_user)
+    return user
+
+
 def _issue_session(db: Session, phone: str, info: dict):
     """建/链本地用户并签发本系统会话 token"""
     huihui_user_id = info.get("userId", "")
-    user = db.query(User).filter(User.huihui_user_id == huihui_user_id).first()
-    if not user:
-        user = User(huihui_user_id=huihui_user_id)
+    user = _find_or_link_user(db, phone, huihui_user_id)
     if phone:
         user.phone = phone
     if info.get("nickname"):

digital-avatar-app/backend/tests/test_huihui_auth.py

@@ -0,0 +1,137 @@
+"""Tests for preserving local avatar ownership when Huihui IDs change."""
+
+from datetime import datetime
+
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from sqlalchemy.pool import StaticPool
+
+from database import Base
+from models import Avatar, TakeoverCursor, TakeoverMessage, TakeoverReplyTask, User
+from routers.huihui_auth import _issue_session
+
+
+@pytest.fixture
+def db():
+    engine = create_engine(
+        "sqlite://",
+        connect_args={"check_same_thread": False},
+        poolclass=StaticPool,
+    )
+    Base.metadata.create_all(engine)
+    session = sessionmaker(bind=engine, autoflush=False, expire_on_commit=False)()
+    try:
+        yield session
+    finally:
+        session.close()
+
+
+def _add_avatar_data(db, owner_id: str, suffix: str = "1") -> Avatar:
+    avatar = Avatar(id=f"avatar-{suffix}", owner_id=owner_id, name="冯医生")
+    db.add_all(
+        [
+            avatar,
+            TakeoverCursor(id=f"cursor-{suffix}", avatar_id=avatar.id, owner_id=owner_id),
+            TakeoverMessage(
+                id=f"message-{suffix}",
+                avatar_id=avatar.id,
+                owner_id=owner_id,
+                boxim_message_id=f"box-{suffix}",
+                peer_id="peer",
+                direction="incoming",
+                send_time=datetime(2026, 8, 20, 12, 0, 0),
+            ),
+            TakeoverReplyTask(
+                id=f"task-{suffix}",
+                avatar_id=avatar.id,
+                owner_id=owner_id,
+                peer_id="peer",
+                trigger_message_id=f"trigger-{suffix}",
+                scheduled_at=datetime(2026, 8, 20, 12, 0, 3),
+                boxim_local_id=f"local-{suffix}",
+            ),
+        ]
+    )
+    db.commit()
+    return avatar
+
+
+def _assert_avatar_data_owner(db, avatar_id: str, owner_id: str):
+    assert db.query(Avatar).filter_by(id=avatar_id).one().owner_id == owner_id
+    assert db.query(TakeoverCursor).filter_by(avatar_id=avatar_id).one().owner_id == owner_id
+    assert db.query(TakeoverMessage).filter_by(avatar_id=avatar_id).one().owner_id == owner_id
+    assert db.query(TakeoverReplyTask).filter_by(avatar_id=avatar_id).one().owner_id == owner_id
+
+
+def test_unique_phone_user_is_reused_when_huihui_id_changes(db):
+    legacy = User(
+        id="legacy-local",
+        huihui_user_id="fat-user-id",
+        phone="18500000000",
+        app_token="old-session",
+    )
+    db.add(legacy)
+    db.commit()
+    avatar = _add_avatar_data(db, legacy.huihui_user_id)
+
+    response = _issue_session(
+        db,
+        "18500000000",
+        {"userId": "prod-user-id", "nickname": "用户", "token": "prod-token"},
+    )
+
+    users = db.query(User).all()
+    assert len(users) == 1
+    assert users[0].id == "legacy-local"
+    assert users[0].huihui_user_id == "prod-user-id"
+    assert response["data"]["token"] == users[0].app_token
+    _assert_avatar_data_owner(db, avatar.id, "prod-user-id")
+
+
+def test_existing_production_user_claims_one_legacy_phone_account(db):
+    current = User(
+        id="prod-local",
+        huihui_user_id="prod-user-id",
+        phone="18500000000",
+    )
+    legacy = User(
+        id="legacy-local",
+        huihui_user_id="fat-user-id",
+        phone="18500000000",
+        app_token="old-session",
+        huihui_token="fat-token",
+    )
+    db.add_all([current, legacy])
+    db.commit()
+    avatar = _add_avatar_data(db, legacy.huihui_user_id)
+
+    _issue_session(
+        db,
+        "18500000000",
+        {"userId": "prod-user-id", "nickname": "用户", "token": "prod-token"},
+    )
+
+    db.refresh(legacy)
+    assert legacy.app_token == ""
+    assert legacy.huihui_token == ""
+    _assert_avatar_data_owner(db, avatar.id, "prod-user-id")
+
+
+def test_ambiguous_phone_matches_do_not_move_existing_avatars(db):
+    first = User(id="first", huihui_user_id="fat-1", phone="18500000000")
+    second = User(id="second", huihui_user_id="fat-2", phone="18500000000")
+    db.add_all([first, second])
+    db.commit()
+    first_avatar = _add_avatar_data(db, first.huihui_user_id, "1")
+    second_avatar = _add_avatar_data(db, second.huihui_user_id, "2")
+
+    _issue_session(
+        db,
+        "18500000000",
+        {"userId": "prod-user-id", "nickname": "用户", "token": "prod-token"},
+    )
+
+    assert db.query(User).count() == 3
+    _assert_avatar_data_owner(db, first_avatar.id, "fat-1")
+    _assert_avatar_data_owner(db, second_avatar.id, "fat-2")