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89 lines
3.8 KiB
Python
89 lines
3.8 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) 2015-2017
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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 TypeHandler class."""
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from .handler import Handler
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class TypeHandler(Handler):
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"""Handler class to handle updates of custom types.
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Attributes:
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type (:obj:`type`): The ``type`` of updates this handler should process.
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callback (:obj:`callable`): The callback function for this handler.
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strict (:obj:`bool`): Optional. Use ``type`` instead of ``isinstance``.
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Default is ``False``
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pass_update_queue (:obj:`bool`): Optional. Determines whether ``update_queue`` will be
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passed to the callback function.
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pass_job_queue (:obj:`bool`): Optional. Determines whether ``job_queue`` will be passed to
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the callback function.
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Args:
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type (:obj:`type`): The ``type`` of updates this handler should process, as
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determined by ``isinstance``
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callback (:obj:`callable`): A function that takes ``bot, update`` as positional arguments.
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It will be called when the :attr:`check_update` has determined that an update should be
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processed by this handler.
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strict (:obj:`bool`, optional): Use ``type`` instead of ``isinstance``.
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Default is ``False``
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pass_update_queue (:obj:`bool`, optional): If set to ``True``, a keyword argument called
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``update_queue`` will be passed to the callback function. It will be the ``Queue``
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instance used by the :class:`telegram.ext.Updater` and :class:`telegram.ext.Dispatcher`
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that contains new updates which can be used to insert updates. Default is ``False``.
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pass_job_queue (:obj:`bool`, optional): If set to ``True``, a keyword argument called
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``job_queue`` will be passed to the callback function. It will be a
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:class:`telegram.ext.JobQueue` instance created by the :class:`telegram.ext.Updater`
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which can be used to schedule new jobs. Default is ``False``.
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"""
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def __init__(self, type, callback, strict=False, pass_update_queue=False,
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pass_job_queue=False):
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super(TypeHandler, self).__init__(
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callback, pass_update_queue=pass_update_queue, pass_job_queue=pass_job_queue)
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self.type = type
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self.strict = strict
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def check_update(self, update):
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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`): Incoming telegram update.
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Returns:
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:obj:`bool`
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"""
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if not self.strict:
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return isinstance(update, self.type)
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else:
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return type(update) is self.type
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def handle_update(self, update, dispatcher):
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"""Send the update to the :attr:`callback`.
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Args:
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update (:class:`telegram.Update`): Incoming telegram update.
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dispatcher (:class:`telegram.ext.Dispatcher`): Dispatcher that originated the Update.
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"""
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optional_args = self.collect_optional_args(dispatcher)
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return self.callback(dispatcher.bot, update, **optional_args)
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