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103 lines
4.4 KiB
Python
103 lines
4.4 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 StringCommandHandler class."""
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from future.utils import string_types
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from .handler import Handler
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class StringCommandHandler(Handler):
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"""Handler class to handle string commands. Commands are string updates that start with ``/``.
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Note:
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This handler is not used to handle Telegram :attr:`telegram.Update`, but strings manually
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put in the queue. For example to send messages with the bot using command line or API.
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Attributes:
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command (:obj:`str`): The command this handler should listen for.
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callback (:obj:`callable`): The callback function for this handler.
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pass_args (:obj:`bool`): Optional. Determines whether the handler should be passed
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``args``.
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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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command (:obj:`str`): The command this handler should listen for.
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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 a command should be
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processed by this handler.
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pass_args (:obj:`bool`, optional): Determines whether the handler should be passed the
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arguments passed to the command as a keyword argument called ``args``. It will contain
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a list of strings, which is the text following the command split on single or
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consecutive whitespace characters. 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,
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command,
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callback,
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pass_args=False,
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pass_update_queue=False,
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pass_job_queue=False):
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super(StringCommandHandler, self).__init__(
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callback, pass_update_queue=pass_update_queue, pass_job_queue=pass_job_queue)
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self.command = command
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self.pass_args = pass_args
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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 (:obj:`str`): An incomming command.
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Returns:
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:obj:`bool`
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"""
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return (isinstance(update, string_types) and update.startswith('/')
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and update[1:].split(' ')[0] == self.command)
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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 (:obj:`str`): An incomming command.
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dispatcher (:class:`telegram.ext.Dispatcher`): Dispatcher that originated the command.
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"""
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optional_args = self.collect_optional_args(dispatcher)
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if self.pass_args:
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optional_args['args'] = update.split()[1:]
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return self.callback(dispatcher.bot, update, **optional_args)
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