🚚 Refactor and simplify backend file structure (#609)

src/backend/app/crud/__init__.py

@@ -0,0 +1,38 @@
+from .crud_item import item
+from .crud_user import user
+
+# For a new basic set of CRUD operations you could just do
+
+# from .base import CRUDBase
+# from app.models.item import Item
+# from app.schemas.item import ItemCreate, ItemUpdate
+
+# item = CRUDBase[Item, ItemCreate, ItemUpdate](Item)
+from sqlmodel import Session, select
+from app.core.security import get_password_hash, verify_password
+from app.models import UserCreate, User
+
+
+def create_user(*, session: Session, user_create: UserCreate) -> User:
+    db_obj = User.from_orm(
+        user_create, update={"hashed_password": get_password_hash(user_create.password)}
+    )
+    session.add(db_obj)
+    session.commit()
+    session.refresh(db_obj)
+    return db_obj
+
+
+def get_user_by_email(*, session: Session, email: str) -> User | None:
+    statement = select(User).where(User.email == email)
+    session_user = session.exec(statement).first()
+    return session_user
+
+
+def authenticate(*, session: Session, email: str, password: str) -> User | None:
+    user = get_user_by_email(session=session, email=email)
+    if not user:
+        return None
+    if not verify_password(password, user.hashed_password):
+        return None
+    return user