Add initial project

backend/services/auth_service.py

@@ -0,0 +1,52 @@
+"""Authentication service for business logic."""
+from typing import Optional
+from sqlalchemy.orm import Session
+from backend.models.user import User
+from backend import auth
+from backend.schemas.user import UserCreate
+
+
+class AuthService:
+    """Service for authentication operations."""
+
+    @staticmethod
+    def register_user(db: Session, user_data: UserCreate) -> User:
+        """Register a new user."""
+        db_user = db.query(User).filter(
+            User.username == user_data.username
+        ).first()
+        if db_user:
+            raise ValueError("Username already registered")
+        
+        hashed_password = auth.get_password_hash(user_data.password)
+        new_user = models.User(
+            username=user_data.username,
+            hashed_password=hashed_password
+        )
+        db.add(new_user)
+        db.commit()
+        db.refresh(new_user)
+        return new_user
+
+    @staticmethod
+    def authenticate_user(db: Session, username: str, password: str) -> Optional[User]:
+        """Authenticate a user with username and password."""
+        user = db.query(User).filter(
+            User.username == username
+        ).first()
+        if not user or not auth.verify_password(password, user.hashed_password):
+            return None
+        return user
+
+    @staticmethod
+    def create_access_token(username: str) -> str:
+        """Create a JWT access token for a user."""
+        from datetime import timedelta
+        from backend.core.config import settings
+        
+        access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+        access_token = auth.create_access_token(
+            data={"sub": username},
+            expires_delta=access_token_expires
+        )
+        return access_token