Loading poolpay/director/Director.py 0 → 100644 +92 −0 Original line number Diff line number Diff line from dataclasses import dataclass, field from poolpay.model.Card import Card from poolpay.price.constants import DRINK from poolpay.ui.Play import Play from poolpay.ui.scenes.Scene import Scene @dataclass class Director: """ Connects the scenes of a play with the underlying model. The director knows when which scene needs to be presented and what changes need to be done to the model at what time. This class is usually called a Controller in most design patterns, but I found the name director funnier in this context. """ play: Play _next_scene_on_card_presented: type[Scene] = field(init=False) def start(self) -> None: self.nothing_requested() def card_presented(self, card_id: int) -> None: card = Card.get_only(card_id) if not card: # TODO Show error that this card is not enrolled return match self._next_scene_on_card_presented: case self.play.Reversal: self._do_reversal(card) case self.play.Balance: self._do_balance(card) case self.play.PaymentSuccess: self._do_payment(card) def card_removed(self) -> None: self.nothing_requested() def nothing_requested(self) -> None: self._next_scene_on_card_presented = self.play.PaymentSuccess self.play.Idle(self, price=DRINK).present() def reversal_requested(self) -> None: self._next_scene_on_card_presented = self.play.Reversal self.play.WaitForCard(self).present() def balance_requested(self) -> None: self._next_scene_on_card_presented = self.play.Balance self.play.WaitForCard(self).present() def _do_payment(self, card: Card) -> None: # We just pretend that this is certainly atomic and there is no way that we will ever have a race condition here old_balance = card.owner.balance_str card.owner.pay(DRINK) new_balance = card.owner.balance_str # TODO Commit to the database self.play.PaymentSuccess( self, old_balance=old_balance, new_balance=new_balance, person_name=card.owner.name, ).present() def _do_reversal(self, card: Card) -> None: # We just pretend that this is certainly atomic and there is no way that we will ever have a race condition here old_balance = card.owner.balance_str card.owner.pay(-DRINK) new_balance = card.owner.balance_str # TODO Commit to the database self.play.Reversal( self, old_balance=old_balance, new_balance=new_balance, person_name=card.owner.name, ).present() def _do_balance(self, card: Card) -> None: self.play.Balance( self, balance=card.owner.balance_str, person_name=card.owner.name, ).present() Loading
poolpay/director/Director.py 0 → 100644 +92 −0 Original line number Diff line number Diff line from dataclasses import dataclass, field from poolpay.model.Card import Card from poolpay.price.constants import DRINK from poolpay.ui.Play import Play from poolpay.ui.scenes.Scene import Scene @dataclass class Director: """ Connects the scenes of a play with the underlying model. The director knows when which scene needs to be presented and what changes need to be done to the model at what time. This class is usually called a Controller in most design patterns, but I found the name director funnier in this context. """ play: Play _next_scene_on_card_presented: type[Scene] = field(init=False) def start(self) -> None: self.nothing_requested() def card_presented(self, card_id: int) -> None: card = Card.get_only(card_id) if not card: # TODO Show error that this card is not enrolled return match self._next_scene_on_card_presented: case self.play.Reversal: self._do_reversal(card) case self.play.Balance: self._do_balance(card) case self.play.PaymentSuccess: self._do_payment(card) def card_removed(self) -> None: self.nothing_requested() def nothing_requested(self) -> None: self._next_scene_on_card_presented = self.play.PaymentSuccess self.play.Idle(self, price=DRINK).present() def reversal_requested(self) -> None: self._next_scene_on_card_presented = self.play.Reversal self.play.WaitForCard(self).present() def balance_requested(self) -> None: self._next_scene_on_card_presented = self.play.Balance self.play.WaitForCard(self).present() def _do_payment(self, card: Card) -> None: # We just pretend that this is certainly atomic and there is no way that we will ever have a race condition here old_balance = card.owner.balance_str card.owner.pay(DRINK) new_balance = card.owner.balance_str # TODO Commit to the database self.play.PaymentSuccess( self, old_balance=old_balance, new_balance=new_balance, person_name=card.owner.name, ).present() def _do_reversal(self, card: Card) -> None: # We just pretend that this is certainly atomic and there is no way that we will ever have a race condition here old_balance = card.owner.balance_str card.owner.pay(-DRINK) new_balance = card.owner.balance_str # TODO Commit to the database self.play.Reversal( self, old_balance=old_balance, new_balance=new_balance, person_name=card.owner.name, ).present() def _do_balance(self, card: Card) -> None: self.play.Balance( self, balance=card.owner.balance_str, person_name=card.owner.name, ).present()
