Refactor crud module

src/crud/users.py

@@ -0,0 +1,31 @@
+from fastapi import HTTPException
+from passlib.context import CryptContext
+from sqlalchemy.orm import Session
+
+from models import User
+from schemas.users import UserCreate
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def patch_user(db: Session, username: str, user: UserCreate):
+    """Changes the username and/or the password of a User"""
+    db_user = get_user_by_username(db, username)
+    potential_duplicate = get_user_by_username(db, user.username)
+    if potential_duplicate:
+        if potential_duplicate.user_id != db_user.user_id:
+            raise HTTPException(status_code=400, detail="Username already registered")
+
+    db_user.username = user.username
+    db_user.hashed_password = pwd_context.hash(user.password)
+    db.commit()
+
+
+def get_user_by_username(db: Session, username: str):
+    """Fetches a User from the database by their username"""
+    return db.query(User).filter(User.username == username).first()
+
+
+def get_users(db: Session):
+    """Fetch a list of all users"""
+    return db.query(User).all()