sync(api): copy latest standalone code and merge alembic migrations

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/cartsnitch_api/services/auth.py

@@ -1,19 +1,68 @@
-"""Auth service — user profile management.
+"""Auth service — user registration, login, token management."""
 
-Registration, login, token management, and session handling are now
-handled by the Better-Auth service (auth/). This service provides
-user lookup and profile update operations for the API gateway.
-"""
+from uuid import UUID
 
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
+from cartsnitch_api.auth.jwt import create_access_token, create_refresh_token, decode_token
+from cartsnitch_api.auth.passwords import hash_password, verify_password
+from cartsnitch_api.config import settings
+
 
 class AuthService:
     def __init__(self, db: AsyncSession) -> None:
         self.db = db
 
-    async def get_user(self, user_id: str) -> dict:
+    async def register(self, email: str, password: str, display_name: str) -> dict:
+        from cartsnitch_api.models import User
+
+        existing = await self.db.execute(select(User).where(User.email == email))
+        if existing.scalar_one_or_none():
+            raise ValueError("Email already registered")
+
+        user = User(
+            email=email,
+            hashed_password=hash_password(password),
+            display_name=display_name,
+        )
+        self.db.add(user)
+        await self.db.commit()
+        await self.db.refresh(user)
+
+        return self._make_token_response(user.id)
+
+    async def login(self, email: str, password: str) -> dict:
+        from cartsnitch_api.models import User
+
+        result = await self.db.execute(select(User).where(User.email == email))
+        user = result.scalar_one_or_none()
+        if not user or not verify_password(password, user.hashed_password):
+            raise ValueError("Invalid email or password")
+
+        return self._make_token_response(user.id)
+
+    async def refresh(self, refresh_token: str) -> dict:
+        from cartsnitch_api.models import User
+
+        try:
+            payload = decode_token(refresh_token)
+        except ValueError:
+            raise ValueError("Invalid refresh token") from None
+
+        if payload.get("type") != "refresh":
+            raise ValueError("Invalid token type") from None
+
+        user_id = UUID(payload["sub"])
+
+        # Verify the user still exists before issuing new tokens
+        result = await self.db.execute(select(User).where(User.id == user_id))
+        if not result.scalar_one_or_none():
+            raise ValueError("User no longer exists")
+
+        return self._make_token_response(user_id)
+
+    async def get_user(self, user_id: UUID) -> dict:
         from cartsnitch_api.models import User
 
         result = await self.db.execute(select(User).where(User.id == user_id))
@@ -28,7 +77,7 @@ class AuthService:
             "created_at": user.created_at,
         }
 
-    async def update_user(self, user_id: str, **fields) -> dict:
+    async def update_user(self, user_id: UUID, **fields) -> dict:
         from cartsnitch_api.models import User
 
         result = await self.db.execute(select(User).where(User.id == user_id))
@@ -56,7 +105,7 @@ class AuthService:
             "created_at": user.created_at,
         }
 
-    async def delete_user(self, user_id: str) -> None:
+    async def delete_user(self, user_id: UUID) -> None:
         from cartsnitch_api.models import User
 
         result = await self.db.execute(select(User).where(User.id == user_id))
@@ -66,3 +115,11 @@ class AuthService:
 
         await self.db.delete(user)
         await self.db.commit()
+
+    def _make_token_response(self, user_id: UUID) -> dict:
+        return {
+            "access_token": create_access_token(user_id),
+            "refresh_token": create_refresh_token(user_id),
+            "token_type": "bearer",
+            "expires_in": settings.jwt_access_token_expire_minutes * 60,
+        }