mirror of
https://github.com/python-telegram-bot/python-telegram-bot.git
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e9cb6675ca
* Rename internal list of PrefixHandler * Make PFH.prefix and .command setable attributes * Improve coverage
373 lines
17 KiB
Python
373 lines
17 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 CommandHandler and PrefixHandler classes."""
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import re
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import warnings
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from future.utils import string_types
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from telegram.ext import Filters
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from telegram.utils.deprecate import TelegramDeprecationWarning
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from telegram import Update, MessageEntity
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from .handler import Handler
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class CommandHandler(Handler):
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"""Handler class to handle Telegram commands.
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Commands are Telegram messages that start with ``/``, optionally followed by an ``@`` and the
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bot's name and/or some additional text. The handler will add a ``list`` to the
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:class:`CallbackContext` named :attr:`CallbackContext.args`. It will contain a list of strings,
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which is the text following the command split on single or consecutive whitespace characters.
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By default the handler listens to messages as well as edited messages. To change this behavior
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use ``~Filters.update.edited_message`` in the filter argument.
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Attributes:
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command (:obj:`str` | List[:obj:`str`]): The command or list of commands this handler
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should listen for. Limitations are the same as described here
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https://core.telegram.org/bots#commands
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callback (:obj:`callable`): The callback function for this handler.
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filters (:class:`telegram.ext.BaseFilter`): Optional. Only allow updates with these
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Filters.
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allow_edited (:obj:`bool`): Determines Whether the handler should also accept
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edited messages.
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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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pass_user_data (:obj:`bool`): Determines whether ``user_data`` will be passed to
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the callback function.
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pass_chat_data (:obj:`bool`): Determines whether ``chat_data`` will be passed to
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the callback function.
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Note:
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:attr:`pass_user_data` and :attr:`pass_chat_data` determine whether a ``dict`` you
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can use to keep any data in will be sent to the :attr:`callback` function. Related to
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either the user or the chat that the update was sent in. For each update from the same user
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or in the same chat, it will be the same ``dict``.
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Note that this is DEPRECATED, and you should use context based callbacks. See
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https://git.io/fxJuV for more info.
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Args:
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command (:obj:`str` | List[:obj:`str`]): The command or list of commands this handler
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should listen for. Limitations are the same as described here
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https://core.telegram.org/bots#commands
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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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filters (:class:`telegram.ext.BaseFilter`, optional): A filter inheriting from
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:class:`telegram.ext.filters.BaseFilter`. Standard filters can be found in
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:class:`telegram.ext.filters.Filters`. Filters can be combined using bitwise
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operators (& for and, | for or, ~ for not).
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allow_edited (:obj:`bool`, optional): Determines whether the handler should also accept
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edited messages. Default is ``False``.
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DEPRECATED: Edited is allowed by default. To change this behavior use
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``~Filters.update.edited_message``.
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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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pass_user_data (:obj:`bool`, optional): If set to ``True``, a keyword argument called
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``user_data`` will be passed to the callback function. Default is ``False``.
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DEPRECATED: Please switch to context based callbacks.
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pass_chat_data (:obj:`bool`, optional): If set to ``True``, a keyword argument called
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``chat_data`` will be passed to the callback function. Default is ``False``.
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DEPRECATED: Please switch to context based callbacks.
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Raises:
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ValueError - when command is too long or has illegal chars.
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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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filters=None,
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allow_edited=None,
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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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pass_user_data=False,
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pass_chat_data=False):
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super(CommandHandler, 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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pass_user_data=pass_user_data,
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pass_chat_data=pass_chat_data)
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if isinstance(command, string_types):
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self.command = [command.lower()]
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else:
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self.command = [x.lower() for x in command]
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for comm in self.command:
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if not re.match(r'^[\da-z_]{1,32}$', comm):
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raise ValueError('Command is not a valid bot command')
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if filters:
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self.filters = Filters.update.messages & filters
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else:
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self.filters = Filters.update.messages
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if allow_edited is not None:
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warnings.warn('allow_edited is deprecated. See https://git.io/fxJuV for more info',
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TelegramDeprecationWarning,
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stacklevel=2)
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if not allow_edited:
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self.filters &= ~Filters.update.edited_message
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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 (:class:`telegram.Update`): Incoming telegram update.
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Returns:
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:obj:`list`: The list of args for the handler
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"""
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if isinstance(update, Update) and update.effective_message:
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message = update.effective_message
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if (message.entities and message.entities[0].type == MessageEntity.BOT_COMMAND
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and message.entities[0].offset == 0):
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command = message.text[1:message.entities[0].length]
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args = message.text.split()[1:]
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command = command.split('@')
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command.append(message.bot.username)
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if not (command[0].lower() in self.command
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and command[1].lower() == message.bot.username.lower()):
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return None
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filter_result = self.filters(update)
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if filter_result:
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return args, filter_result
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else:
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return False
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def collect_optional_args(self, dispatcher, update=None, check_result=None):
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optional_args = super(CommandHandler, self).collect_optional_args(dispatcher, update)
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if self.pass_args:
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optional_args['args'] = check_result[0]
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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[0]
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if isinstance(check_result[1], dict):
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context.update(check_result[1])
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class PrefixHandler(CommandHandler):
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"""Handler class to handle custom prefix commands
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This is a intermediate handler between :class:`MessageHandler` and :class:`CommandHandler`.
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It supports configurable commands with the same options as CommandHandler. It will respond to
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every combination of :attr:`prefix` and :attr:`command`. It will add a ``list`` to the
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:class:`CallbackContext` named :attr:`CallbackContext.args`. It will contain a list of strings,
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which is the text following the command split on single or consecutive whitespace characters.
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Examples::
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Single prefix and command:
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PrefixHandler('!', 'test', callback) will respond to '!test'.
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Multiple prefixes, single command:
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PrefixHandler(['!', '#'], 'test', callback) will respond to '!test' and
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'#test'.
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Miltiple prefixes and commands:
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PrefixHandler(['!', '#'], ['test', 'help`], callback) will respond to '!test',
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'#test', '!help' and '#help'.
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By default the handler listens to messages as well as edited messages. To change this behavior
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use ~``Filters.update.edited_message``.
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Attributes:
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prefix (:obj:`str` | List[:obj:`str`]): The prefix(es) that will precede :attr:`command`.
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command (:obj:`str` | List[:obj:`str`]): The command or list of commands this handler
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should listen for.
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callback (:obj:`callable`): The callback function for this handler.
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filters (:class:`telegram.ext.BaseFilter`): Optional. Only allow updates with these
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Filters.
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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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pass_user_data (:obj:`bool`): Determines whether ``user_data`` will be passed to
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the callback function.
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pass_chat_data (:obj:`bool`): Determines whether ``chat_data`` will be passed to
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the callback function.
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Note:
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:attr:`pass_user_data` and :attr:`pass_chat_data` determine whether a ``dict`` you
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can use to keep any data in will be sent to the :attr:`callback` function. Related to
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either the user or the chat that the update was sent in. For each update from the same user
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or in the same chat, it will be the same ``dict``.
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Note that this is DEPRECATED, and you should use context based callbacks. See
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https://git.io/fxJuV for more info.
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Args:
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prefix (:obj:`str` | List[:obj:`str`]): The prefix(es) that will precede :attr:`command`.
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command (:obj:`str` | List[:obj:`str`]): The command or list of commands this handler
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should listen for.
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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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filters (:class:`telegram.ext.BaseFilter`, optional): A filter inheriting from
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:class:`telegram.ext.filters.BaseFilter`. Standard filters can be found in
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:class:`telegram.ext.filters.Filters`. Filters can be combined using bitwise
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operators (& for and, | for or, ~ for not).
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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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pass_user_data (:obj:`bool`, optional): If set to ``True``, a keyword argument called
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``user_data`` will be passed to the callback function. Default is ``False``.
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DEPRECATED: Please switch to context based callbacks.
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pass_chat_data (:obj:`bool`, optional): If set to ``True``, a keyword argument called
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``chat_data`` will be passed to the callback function. 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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prefix,
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command,
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callback,
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filters=None,
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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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pass_user_data=False,
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pass_chat_data=False):
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self._prefix = list()
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self._command = list()
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self._commands = list()
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super(PrefixHandler, self).__init__(
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'nocommand', callback, filters=filters, allow_edited=None, pass_args=pass_args,
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pass_update_queue=pass_update_queue,
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pass_job_queue=pass_job_queue,
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pass_user_data=pass_user_data,
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pass_chat_data=pass_chat_data)
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self.prefix = prefix
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self.command = command
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self._build_commands()
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@property
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def prefix(self):
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return self._prefix
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@prefix.setter
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def prefix(self, prefix):
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if isinstance(prefix, string_types):
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self._prefix = [prefix.lower()]
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else:
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self._prefix = prefix
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self._build_commands()
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@property
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def command(self):
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return self._command
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@command.setter
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def command(self, command):
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if isinstance(command, string_types):
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self._command = [command.lower()]
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else:
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self._command = command
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self._build_commands()
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def _build_commands(self):
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self._commands = [x.lower() + y.lower() for x in self.prefix for y in self.command]
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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:`list`: The list of args for the handler
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"""
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if isinstance(update, Update) and update.effective_message:
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message = update.effective_message
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if message.text:
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text_list = message.text.split()
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if text_list[0].lower() not in self._commands:
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return None
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filter_result = self.filters(update)
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if filter_result:
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return text_list[1:], filter_result
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else:
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return False
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def collect_additional_context(self, context, update, dispatcher, check_result):
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context.args = check_result[0]
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if isinstance(check_result[1], dict):
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context.update(check_result[1])
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