from abc import ABC, abstractmethod from contextlib import suppress class MessageStorage(ABC): def __init__(self): self._messages = [] def save_message(self, message): with suppress(KeyError, AttributeError): if self._filter_message(message): self._messages.extend(self._transform_message(message)) @abstractmethod def _filter_message(self, message): raise NotImplementedError def _transform_message(self, message): # pylint: disable=no-self-use yield message def clear(self): self._messages.clear() @property def messages(self): yield from self._messages class FrontendMessageStorage(MessageStorage): def _filter_message(self, message): return message['key'].startswith(( 'console.write', 'dashboard.layout', 'dashboard.terminalMenuItem', 'message.config', 'message.send', 'ide.read' )) def _transform_message(self, message): transformations = { 'ide.read': self._delete_ide_content } if message['key'] in transformations: yield from transformations[message['key']](message) else: yield message @staticmethod def _delete_ide_content(message): del message['content'] yield message