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107 lines
4.9 KiB
Python
107 lines
4.9 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) 2015-2020
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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`): Determines whether the handler should be passed
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``args``.
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pass_update_queue (:obj:`bool`): Determines whether ``update_queue`` will be
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passed to the callback function.
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pass_job_queue (:obj:`bool`): Determines whether ``job_queue`` will be passed to
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the callback function.
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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 for context based API:
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``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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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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DEPRECATED: Please switch to context based callbacks.
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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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DEPRECATED: Please switch to context based callbacks.
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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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DEPRECATED: Please switch to context based callbacks.
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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,
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pass_update_queue=pass_update_queue,
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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 incoming command.
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Returns:
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:obj:`bool`
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"""
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if isinstance(update, string_types) and update.startswith('/'):
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args = update[1:].split(' ')
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if args[0] == self.command:
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return args[1:]
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def collect_optional_args(self, dispatcher, update=None, check_result=None):
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optional_args = super(StringCommandHandler, self).collect_optional_args(dispatcher,
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update,
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check_result)
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if self.pass_args:
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optional_args['args'] = check_result
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return optional_args
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def collect_additional_context(self, context, update, dispatcher, check_result):
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context.args = check_result
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