Reservationer/assets/reservations_response.py

from .reservation import reservation
from .reservations_collection import reservations_collection

class reservations_response:
    def collection(self, targets: list) -> list:
        result = list()

        for count in targets:
            if not isinstance(count, reservation):
                raise TypeError("Reservations list not contain reservation.")

            result.append(self.single(count))

        return result

    def single(self, target: reservation) -> dict:
        response = {
            "target_name": target.target.name,
            "target_barcode": target.target.barcode
        }
        
        if target.email is not None:
            response["email"] = target.email

        if target.phone_number is not None:
            response["phone_number"] = target.phone_number

        return response