feat: 初始提交

backend/app/services/user_service.py

@@ -0,0 +1,62 @@
+from typing import Optional
+
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from ..core.security import hash_password
+from ..models import User
+from ..repositories.user_repository import UserRepository
+from ..schemas.user import UserCreate, UserInDB
+
+
+class UserService:
+    """用户领域服务，负责注册、查询与配额统计。"""
+
+    def __init__(self, session: AsyncSession):
+        self.session = session
+        self.repo = UserRepository(session)
+
+    async def create_user(self, payload: UserCreate, *, external_id: str | None = None) -> UserInDB:
+        hashed_password = hash_password(payload.password)
+        user = User(
+            username=payload.username,
+            email=payload.email,
+            hashed_password=hashed_password,
+            external_id=external_id,
+        )
+
+        self.session.add(user)
+        try:
+            await self.session.commit()
+        except IntegrityError as exc:
+            await self.session.rollback()
+            raise ValueError("用户名或邮箱已存在") from exc
+
+        return UserInDB.model_validate(user)
+
+    async def get_by_username(self, username: str) -> Optional[UserInDB]:
+        user = await self.repo.get_by_username(username)
+        return UserInDB.model_validate(user) if user else None
+
+    async def get_by_email(self, email: str) -> Optional[UserInDB]:
+        user = await self.repo.get_by_email(email)
+        return UserInDB.model_validate(user) if user else None
+
+    async def get_by_external_id(self, external_id: str) -> Optional[UserInDB]:
+        user = await self.repo.get_by_external_id(external_id)
+        return UserInDB.model_validate(user) if user else None
+
+    async def get_user(self, user_id: int) -> Optional[UserInDB]:
+        user = await self.repo.get(id=user_id)
+        return UserInDB.model_validate(user) if user else None
+
+    async def list_users(self) -> list[UserInDB]:
+        users = await self.repo.list_all()
+        return [UserInDB.model_validate(item) for item in users]
+
+    async def increment_daily_request(self, user_id: int) -> None:
+        await self.repo.increment_daily_request(user_id)
+        await self.session.commit()
+
+    async def get_daily_request(self, user_id: int) -> int:
+        return await self.repo.get_daily_request(user_id)