import typing class CallbackDataFilter: def __init__(self, factory, config: typing.Dict[str, str]): self.config = config self.factory = factory def check(self, query): """ Checks if query.data appropriates to specified config :param query: telebot.types.CallbackQuery :return: bool """ try: data = self.factory.parse(query.data) except ValueError: return False for key, value in self.config.items(): if isinstance(value, (list, tuple, set, frozenset)): if data.get(key) not in value: return False elif data.get(key) != value: return False return True class CallbackData: """ Callback data factory This class will help you to work with CallbackQuery """ def __init__(self, *parts, prefix: str, sep=':'): if not isinstance(prefix, str): raise TypeError(f'Prefix must be instance of str not {type(prefix).__name__}') if not prefix: raise ValueError("Prefix can't be empty") if sep in prefix: raise ValueError(f"Separator {sep!r} can't be used in prefix") self.prefix = prefix self.sep = sep self._part_names = parts def new(self, *args, **kwargs) -> str: """ Generate callback data :param args: positional parameters of CallbackData instance parts :param kwargs: named parameters :return: str """ args = list(args) data = [self.prefix] for part in self._part_names: value = kwargs.pop(part, None) if value is None: if args: value = args.pop(0) else: raise ValueError(f'Value for {part!r} was not passed!') if value is not None and not isinstance(value, str): value = str(value) if self.sep in value: raise ValueError(f"Symbol {self.sep!r} is defined as the separator and can't be used in parts' values") data.append(value) if args or kwargs: raise TypeError('Too many arguments were passed!') callback_data = self.sep.join(data) if len(callback_data.encode()) > 64: raise ValueError('Resulted callback data is too long!') return callback_data def parse(self, callback_data: str) -> typing.Dict[str, str]: """ Parse data from the callback data :param callback_data: string, use to telebot.types.CallbackQuery to parse it from string to a dict :return: dict parsed from callback data """ prefix, *parts = callback_data.split(self.sep) if prefix != self.prefix: raise ValueError("Passed callback data can't be parsed with that prefix.") elif len(parts) != len(self._part_names): raise ValueError('Invalid parts count!') result = {'@': prefix} result.update(zip(self._part_names, parts)) return result def filter(self, **config) -> CallbackDataFilter: """ Generate filter :param config: specified named parameters will be checked with CallbackQury.data :return: CallbackDataFilter class """ for key in config.keys(): if key not in self._part_names: raise ValueError(f'Invalid field name {key!r}') return CallbackDataFilter(self, config)