43 lines
1.3 KiB
Python
43 lines
1.3 KiB
Python
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"""
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Создать интерфейс Observer с методом update(event),
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где event может быть строкой или объектом с типом события ("path_found", "move", "maze_loaded").
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"""
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from enum import Enum
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from abc import ABC, abstractmethod
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class MazeEventType(Enum):
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PATH_FOUND = "path_found"
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MOVE = "move"
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MAZE_LOADED = "maze_loaded"
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class MazeEvent:
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data=None
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def __init__(self, evtype: MazeEventType, data=None):
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if not isinstance(evtype, MazeEventType):
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raise TypeError(f"evtype must be an EventType, got {type(evtype)}")
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self.evtype = evtype
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self.data = data
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class Observer(ABC):
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@abstractmethod
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def update(self, event: MazeEvent):
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raise NotImplementedError
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class Subject(ABC):
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"""Издатель: управляет подписчиками и отправляет им уведомления."""
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def __init__(self):
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self._observers:set[Observer] = set()
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def attach(self, obs:Observer):
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"Подписать наблюдателя"
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self._observers.add(obs)
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def detach(self, obs:Observer):
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"Отписать наблюдателя"
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self._observers.discard(obs)
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def notify(self, event:MazeEvent):
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for obs in self._observers:
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obs.update(event)
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