msf

@bp.route('/create/', methods=['POST'], endpoint='create')
def create():
    input = createInputFromForm(request.form)
    handler = get_app_handler() 
    app = handler.create(input.name, input.description)
    
    return redirect(url_for('app.show', app_id=app.id), code=301)


def get_app_handler():

msf

from services.app.create import create_app
from services.update import update_app
from services.delete import delete_app
from repositories.app import delete_app, find_app_by_id, idempotent_save_app

class AppHandler(object):
    def create(self, name: str, description: str) -> Entity:
        if not validate_create_input(name, description):
            ...
        app = create_app(name, description)

msf

import repository

def create_app(name, description):
    validate_app_name(name)
    return repository.create_app(name, description)

msf

from values.app import App
from repository.sqlalchemy.entities import DBApp
from repository.sqlalchemy.sessions import Session


def find_app_by_id(app_id):
    db_app = DBApp.query.get(id=app_id)
    if not db_app:
        return None

msf

@dataclass
class User:
    username: str
    email: str
    first_name: str
    last_name: str
       
    @classmethod
    def from_db(cls, db_user):
        return cls(