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88 lines
3.5 KiB
Python
88 lines
3.5 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) 2015-2016
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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 RegexHandler class """
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import re
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from future.utils import string_types
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from .handler import Handler
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from telegram import Update
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from telegram.utils.deprecate import deprecate
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class RegexHandler(Handler):
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"""
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Handler class to handle Telegram updates based on a regex. It uses a
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regular expression to check text messages. Read the documentation of the
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``re`` module for more information. The ``re.match`` function is used to
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determine if an update should be handled by this handler.
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Args:
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pattern (str or Pattern): The regex pattern.
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callback (function): A function that takes ``bot, update`` as
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positional arguments. It will be called when the ``check_update``
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has determined that an update should be processed by this handler.
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pass_groups (optional[bool]): If the callback should be passed the
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result of ``re.match(pattern, text).groups()`` as a keyword
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argument called ``groups``. Default is ``False``
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pass_groupdict (optional[bool]): If the callback should be passed the
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result of ``re.match(pattern, text).groupdict()`` as a keyword
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argument called ``groupdict``. Default is ``False``
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pass_update_queue (optional[bool]): If the handler should be passed the
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update queue as a keyword argument called ``update_queue``. It can
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be used to insert updates. Default is ``False``
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"""
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def __init__(self, pattern, callback, pass_groups=False,
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pass_groupdict=False, pass_update_queue=False):
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super(RegexHandler, self).__init__(callback, pass_update_queue)
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if isinstance(pattern, string_types):
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pattern = re.compile(pattern)
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self.pattern = pattern
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self.pass_groups = pass_groups
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self.pass_groupdict = pass_groupdict
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def check_update(self, update):
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if (isinstance(update, Update) and
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update.message and
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update.message.text):
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match = re.match(self.pattern, update.message.text)
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return bool(match)
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else:
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return False
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def handle_update(self, update, dispatcher):
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optional_args = self.collect_optional_args(dispatcher)
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match = re.match(self.pattern, update.message.text)
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if self.pass_groups:
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optional_args['groups'] = match.groups()
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if self.pass_groupdict:
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optional_args['groupdict'] = match.groupdict()
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self.callback(dispatcher.bot, update, **optional_args)
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# old non-PEP8 Handler methods
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m = "telegram.RegexHandler."
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checkUpdate = deprecate(check_update, m + "checkUpdate", m + "check_update")
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handleUpdate = deprecate(handle_update, m + "handleUpdate", m + "handle_update")
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