first commit

backend/app/services/users.py

@@ -0,0 +1,41 @@
+from sqlalchemy.orm import Session
+
+from app.core.security import hash_password, verify_password
+from app.models.user import User
+from app.schemas.auth import RegisterRequest
+
+
+class EmailAlreadyRegisteredError(Exception):
+    pass
+
+
+def get_user_by_email(db: Session, email: str) -> User | None:
+    return db.query(User).filter(User.email == email).first()
+
+
+def get_user_by_id(db: Session, user_id: int) -> User | None:
+    return db.query(User).filter(User.id == user_id).first()
+
+
+def register_user(db: Session, body: RegisterRequest) -> User:
+    if get_user_by_email(db, body.email):
+        raise EmailAlreadyRegisteredError()
+    user = User(
+        email=body.email,
+        hashed_password=hash_password(body.password),
+        full_name=body.full_name,
+        is_active=True,
+    )
+    db.add(user)
+    db.commit()
+    db.refresh(user)
+    return user
+
+
+def authenticate_user(db: Session, email: str, password: str) -> User | None:
+    user = get_user_by_email(db, email)
+    if not user or not user.is_active:
+        return None
+    if not verify_password(password, user.hashed_password):
+        return None
+    return user