python-telegram-bot/telegram/ext/regexhandler.py
Jacob Bom 1b7f83625c Update copyright notice to include 2017
Not strictly needed, but it helps show that the project is being actively
developed which I find important.
2017-05-15 00:36:49 +03:00

126 lines
5.7 KiB
Python

#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2017
# Leandro Toledo de Souza <devs@python-telegram-bot.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser Public License for more details.
#
# You should have received a copy of the GNU Lesser Public License
# along with this program. If not, see [http://www.gnu.org/licenses/].
""" This module contains the RegexHandler class """
import re
from future.utils import string_types
from .handler import Handler
from telegram import Update
from telegram.utils.deprecate import deprecate
class RegexHandler(Handler):
"""
Handler class to handle Telegram updates based on a regex. It uses a
regular expression to check text messages. Read the documentation of the
``re`` module for more information. The ``re.match`` function is used to
determine if an update should be handled by this handler.
Args:
pattern (str or Pattern): The regex pattern.
callback (function): A function that takes ``bot, update`` as
positional arguments. It will be called when the ``check_update``
has determined that an update should be processed by this handler.
pass_groups (optional[bool]): If the callback should be passed the
result of ``re.match(pattern, text).groups()`` as a keyword
argument called ``groups``. Default is ``False``
pass_groupdict (optional[bool]): If the callback should be passed the
result of ``re.match(pattern, text).groupdict()`` as a keyword
argument called ``groupdict``. Default is ``False``
pass_update_queue (optional[bool]): If set to ``True``, a keyword argument called
``update_queue`` will be passed to the callback function. It will be the ``Queue``
instance used by the ``Updater`` and ``Dispatcher`` that contains new updates which can
be used to insert updates. Default is ``False``.
pass_job_queue (optional[bool]): If set to ``True``, a keyword argument called
``job_queue`` will be passed to the callback function. It will be a ``JobQueue``
instance created by the ``Updater`` which can be used to schedule new jobs.
Default is ``False``.
pass_user_data (optional[bool]): If set to ``True``, a keyword argument called
``user_data`` will be passed to the callback function. It will be a ``dict`` you
can use to keep any data related to the user that sent the update. For each update of
the same user, it will be the same ``dict``. Default is ``False``.
pass_chat_data (optional[bool]): If set to ``True``, a keyword argument called
``chat_data`` will be passed to the callback function. It will be a ``dict`` you
can use to keep any data related to the chat that the update was sent in.
For each update in the same chat, it will be the same ``dict``. Default is ``False``.
"""
def __init__(self,
pattern,
callback,
pass_groups=False,
pass_groupdict=False,
pass_update_queue=False,
pass_job_queue=False,
pass_user_data=False,
pass_chat_data=False,
allow_edited=False,
message_updates=True,
channel_post_updates=False):
super(RegexHandler, self).__init__(
callback,
pass_update_queue=pass_update_queue,
pass_job_queue=pass_job_queue,
pass_user_data=pass_user_data,
pass_chat_data=pass_chat_data)
if isinstance(pattern, string_types):
pattern = re.compile(pattern)
self.pattern = pattern
self.pass_groups = pass_groups
self.pass_groupdict = pass_groupdict
self.allow_edited = allow_edited
self.message_updates = message_updates
self.channel_post_updates = channel_post_updates
def _is_allowed_message(self, update):
return (self.message_updates
and (update.message or (update.edited_message and self.allow_edited)))
def _is_allowed_channel_post(self, update):
return (self.channel_post_updates
and (update.channel_post or (update.edited_channel_post and self.allow_edited)))
def check_update(self, update):
if (isinstance(update, Update)
and (self._is_allowed_message(update) or self._is_allowed_channel_post(update))
and update.effective_message.text):
match = re.match(self.pattern, update.effective_message.text)
return bool(match)
else:
return False
def handle_update(self, update, dispatcher):
optional_args = self.collect_optional_args(dispatcher, update)
match = re.match(self.pattern, update.effective_message.text)
if self.pass_groups:
optional_args['groups'] = match.groups()
if self.pass_groupdict:
optional_args['groupdict'] = match.groupdict()
return self.callback(dispatcher.bot, update, **optional_args)
# old non-PEP8 Handler methods
m = "telegram.RegexHandler."
checkUpdate = deprecate(check_update, m + "checkUpdate", m + "check_update")
handleUpdate = deprecate(handle_update, m + "handleUpdate", m + "handle_update")