25 lines
516 B
Python
25 lines
516 B
Python
from essentials.models.Event import Event
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class BaseObserver:
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def subscribe(self, topic, callback):
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callbacks = getattr(self, f'on_{topic}', None)
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if callbacks is None:
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return
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callbacks.append(callback)
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def notify(self, topic, subject = None, meta = None):
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callbacks = getattr(self, f'on_{topic}', None)
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if callbacks is None:
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return
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event = Event(subject, meta)
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for callback in callbacks:
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callback(event)
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