working auth + users systems

backend/modules/auth/services.py

@@ -0,0 +1,30 @@
+# modules/auth/services.py
+from sqlalchemy.orm import Session
+from modules.auth.models import User
+from modules.auth.schemas import UserResponse
+from modules.auth.security import hash_password
+from core.exceptions import conflict_exception
+import uuid
+
+
+def create_user(username: str, password: str, name: str, db: Session) -> UserResponse:
+    """
+    Create a new user in the database.
+    Hashes the password before storing it.
+    Returns the created user object.
+    """
+    if db is None:
+        raise ValueError("Database session is required")
+
+    # Check if the user already exists
+    existing_user = db.query(User).filter(User.username == username).first()
+    if existing_user:
+        raise conflict_exception("Username already exists")
+    
+    hashed_password = hash_password(password)
+    user_uuid = str(uuid.uuid4())
+    user = User(username=username, hashed_password=hashed_password, name=name, uuid=user_uuid)
+    db.add(user)
+    db.commit()
+    db.refresh(user)  # Loads the generated ID
+    return UserResponse.model_validate(user)  # Converts SQLAlchemy model -> Pydantic