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116 lines
4.3 KiB
Python
116 lines
4.3 KiB
Python
#!/usr/bin/env python
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#
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# A library that provides a Python interface to the Telegram Bot API
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# Copyright (C) 2015-2022
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# Leandro Toledo de Souza <devs@python-telegram-bot.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser Public License for more details.
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#
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# You should have received a copy of the GNU Lesser Public License
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# along with this program. If not, see [http://www.gnu.org/licenses/].
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"""This module contains the ChosenInlineResultHandler class."""
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import re
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from typing import Optional, TypeVar, Union, Callable, TYPE_CHECKING, Pattern, Match, cast
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from telegram import Update
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from telegram.ext import Handler
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from telegram._utils.defaultvalue import DefaultValue, DEFAULT_FALSE
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from telegram.ext._utils.types import CCT
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RT = TypeVar('RT')
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if TYPE_CHECKING:
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from telegram.ext import CallbackContext, Dispatcher
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class ChosenInlineResultHandler(Handler[Update, CCT]):
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"""Handler class to handle Telegram updates that contain a chosen inline result.
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Warning:
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When setting ``run_async`` to :obj:`True`, you cannot rely on adding custom
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attributes to :class:`telegram.ext.CallbackContext`. See its docs for more info.
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Args:
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callback (:obj:`callable`): The callback function for this handler. Will be called when
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:attr:`check_update` has determined that an update should be processed by this handler.
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Callback signature: ``def callback(update: Update, context: CallbackContext)``
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The return value of the callback is usually ignored except for the special case of
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:class:`telegram.ext.ConversationHandler`.
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run_async (:obj:`bool`): Determines whether the callback will run asynchronously.
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Defaults to :obj:`False`.
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pattern (:obj:`str` | `Pattern`, optional): Regex pattern. If not :obj:`None`, ``re.match``
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is used on :attr:`telegram.ChosenInlineResult.result_id` to determine if an update
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should be handled by this handler. This is accessible in the callback as
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:attr:`telegram.ext.CallbackContext.matches`.
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.. versionadded:: 13.6
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Attributes:
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callback (:obj:`callable`): The callback function for this handler.
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run_async (:obj:`bool`): Determines whether the callback will run asynchronously.
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pattern (`Pattern`): Optional. Regex pattern to test
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:attr:`telegram.ChosenInlineResult.result_id` against.
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.. versionadded:: 13.6
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"""
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__slots__ = ('pattern',)
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def __init__(
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self,
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callback: Callable[[Update, 'CallbackContext'], RT],
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run_async: Union[bool, DefaultValue] = DEFAULT_FALSE,
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pattern: Union[str, Pattern] = None,
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):
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super().__init__(
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callback,
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run_async=run_async,
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)
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if isinstance(pattern, str):
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pattern = re.compile(pattern)
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self.pattern = pattern
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def check_update(self, update: object) -> Optional[Union[bool, object]]:
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"""Determines whether an update should be passed to this handlers :attr:`callback`.
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Args:
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update (:class:`telegram.Update` | :obj:`object`): Incoming update.
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Returns:
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:obj:`bool`
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"""
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if isinstance(update, Update) and update.chosen_inline_result:
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if self.pattern:
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match = re.match(self.pattern, update.chosen_inline_result.result_id)
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if match:
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return match
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else:
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return True
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return None
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def collect_additional_context(
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self,
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context: 'CallbackContext',
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update: Update,
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dispatcher: 'Dispatcher',
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check_result: Union[bool, Match],
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) -> None:
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"""This function adds the matched regex pattern result to
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:attr:`telegram.ext.CallbackContext.matches`.
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"""
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if self.pattern:
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check_result = cast(Match, check_result)
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context.matches = [check_result]
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