telegram/ext/_callbackcontext.py
#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2024
# 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 CallbackContext class."""
from typing import (
TYPE_CHECKING,
Any,
Awaitable,
Dict,
Generator,
Generic,
List,
Match,
NoReturn,
Optional,
Type,
Union,
)
from telegram._callbackquery import CallbackQuery
from telegram._update import Update
from telegram._utils.warnings import warn
from telegram.ext._extbot import ExtBot
from telegram.ext._utils.types import BD, BT, CD, UD
if TYPE_CHECKING:
from asyncio import Future, Queue
from telegram.ext import Application, Job, JobQueue
from telegram.ext._utils.types import CCT
_STORING_DATA_WIKI = (
"https://github.com/python-telegram-bot/python-telegram-bot"
"/wiki/Storing-bot%2C-user-and-chat-related-data"
)
class CallbackContext(Generic[BT, UD, CD, BD]):
"""
This is a context object passed to the callback called by :class:`telegram.ext.BaseHandler`
or by the :class:`telegram.ext.Application` in an error handler added by
:attr:`telegram.ext.Application.add_error_handler` or to the callback of a
:class:`telegram.ext.Job`.
Note:
:class:`telegram.ext.Application` will create a single context for an entire update. This
means that if you got 2 handlers in different groups and they both get called, they will
receive the same :class:`CallbackContext` object (of course with proper attributes like
:attr:`matches` differing). This allows you to add custom attributes in a lower handler
group callback, and then subsequently access those attributes in a higher handler group
callback. Note that the attributes on :class:`CallbackContext` might change in the future,
so make sure to use a fairly unique name for the attributes.
Warning:
Do not combine custom attributes with :paramref:`telegram.ext.BaseHandler.block` set to
:obj:`False` or :attr:`telegram.ext.Application.concurrent_updates` set to
:obj:`True`. Due to how those work, it will almost certainly execute the callbacks for an
update out of order, and the attributes that you think you added will not be present.
This class is a :class:`~typing.Generic` class and accepts four type variables:
1. The type of :attr:`bot`. Must be :class:`telegram.Bot` or a subclass of that class.
2. The type of :attr:`user_data` (if :attr:`user_data` is not :obj:`None`).
3. The type of :attr:`chat_data` (if :attr:`chat_data` is not :obj:`None`).
4. The type of :attr:`bot_data` (if :attr:`bot_data` is not :obj:`None`).
Examples:
* :any:`Context Types Bot <examples.contexttypesbot>`
* :any:`Custom Webhook Bot <examples.customwebhookbot>`
.. seealso:: :attr:`telegram.ext.ContextTypes.DEFAULT_TYPE`,
:wiki:`Job Queue <Extensions---JobQueue>`
Args:
application (:class:`telegram.ext.Application`): The application associated with this
context.
chat_id (:obj:`int`, optional): The ID of the chat associated with this object. Used
to provide :attr:`chat_data`.
.. versionadded:: 20.0
user_id (:obj:`int`, optional): The ID of the user associated with this object. Used
to provide :attr:`user_data`.
.. versionadded:: 20.0
Attributes:
coroutine (:term:`awaitable`): Optional. Only present in error handlers if the
error was caused by an awaitable run with :meth:`Application.create_task` or a handler
callback with :attr:`block=False <BaseHandler.block>`.
matches (List[:meth:`re.Match <re.Match.expand>`]): Optional. If the associated update
originated from a :class:`filters.Regex`, this will contain a list of match objects for
every pattern where ``re.search(pattern, string)`` returned a match. Note that filters
short circuit, so combined regex filters will not always be evaluated.
args (List[:obj:`str`]): Optional. Arguments passed to a command if the associated update
is handled by :class:`telegram.ext.CommandHandler`, :class:`telegram.ext.PrefixHandler`
or :class:`telegram.ext.StringCommandHandler`. It contains a list of the words in the
text after the command, using any whitespace string as a delimiter.
error (:exc:`Exception`): Optional. The error that was raised. Only present when passed
to an error handler registered with :attr:`telegram.ext.Application.add_error_handler`.
job (:class:`telegram.ext.Job`): Optional. The job which originated this callback.
Only present when passed to the callback of :class:`telegram.ext.Job` or in error
handlers if the error is caused by a job.
.. versionchanged:: 20.0
:attr:`job` is now also present in error handlers if the error is caused by a job.
"""
__slots__ = (
"__dict__",
"_application",
"_chat_id",
"_user_id",
"args",
"coroutine",
"error",
"job",
"matches",
)
def __init__(
self: "CCT",
application: "Application[BT, CCT, UD, CD, BD, Any]",
chat_id: Optional[int] = None,
user_id: Optional[int] = None,
):
self._application: Application[BT, CCT, UD, CD, BD, Any] = application
self._chat_id: Optional[int] = chat_id
self._user_id: Optional[int] = user_id
self.args: Optional[List[str]] = None
self.matches: Optional[List[Match[str]]] = None
self.error: Optional[Exception] = None
self.job: Optional[Job[CCT]] = None
self.coroutine: Optional[
Union[Generator[Optional[Future[object]], None, Any], Awaitable[Any]]
] = None
@property
def application(self) -> "Application[BT, CCT, UD, CD, BD, Any]":
""":class:`telegram.ext.Application`: The application associated with this context."""
return self._application
@property
def bot_data(self) -> BD:
""":obj:`ContextTypes.bot_data`: Optional. An object that can be used to keep any data in.
For each update it will be the same :attr:`ContextTypes.bot_data`. Defaults to :obj:`dict`.
.. seealso:: :wiki:`Storing Bot, User and Chat Related Data\
<Storing-bot%2C-user-and-chat-related-data>`
"""
return self.application.bot_data
@bot_data.setter
def bot_data(self, value: object) -> NoReturn:
raise AttributeError(
f"You can not assign a new value to bot_data, see {_STORING_DATA_WIKI}"
)
@property
def chat_data(self) -> Optional[CD]:
""":obj:`ContextTypes.chat_data`: Optional. An object that can be used to keep any data in.
For each update from the same chat id it will be the same :obj:`ContextTypes.chat_data`.
Defaults to :obj:`dict`.
Warning:
When a group chat migrates to a supergroup, its chat id will change and the
``chat_data`` needs to be transferred. For details see our
:wiki:`wiki page <Storing-bot,-user-and-chat-related-data#chat-migration>`.
.. seealso:: :wiki:`Storing Bot, User and Chat Related Data\
<Storing-bot%2C-user-and-chat-related-data>`
.. versionchanged:: 20.0
The chat data is now also present in error handlers if the error is caused by a job.
"""
if self._chat_id is not None:
return self._application.chat_data[self._chat_id]
return None
@chat_data.setter
def chat_data(self, value: object) -> NoReturn:
raise AttributeError(
f"You can not assign a new value to chat_data, see {_STORING_DATA_WIKI}"
)
@property
def user_data(self) -> Optional[UD]:
""":obj:`ContextTypes.user_data`: Optional. An object that can be used to keep any data in.
For each update from the same user it will be the same :obj:`ContextTypes.user_data`.
Defaults to :obj:`dict`.
.. seealso:: :wiki:`Storing Bot, User and Chat Related Data\
<Storing-bot%2C-user-and-chat-related-data>`
.. versionchanged:: 20.0
The user data is now also present in error handlers if the error is caused by a job.
"""
if self._user_id is not None:
return self._application.user_data[self._user_id]
return None
@user_data.setter
def user_data(self, value: object) -> NoReturn:
raise AttributeError(
f"You can not assign a new value to user_data, see {_STORING_DATA_WIKI}"
)
async def refresh_data(self) -> None:
"""If :attr:`application` uses persistence, calls
:meth:`telegram.ext.BasePersistence.refresh_bot_data` on :attr:`bot_data`,
:meth:`telegram.ext.BasePersistence.refresh_chat_data` on :attr:`chat_data` and
:meth:`telegram.ext.BasePersistence.refresh_user_data` on :attr:`user_data`, if
appropriate.
Will be called by :meth:`telegram.ext.Application.process_update` and
:meth:`telegram.ext.Job.run`.
.. versionadded:: 13.6
"""
if self.application.persistence:
if self.application.persistence.store_data.bot_data:
await self.application.persistence.refresh_bot_data(self.bot_data)
if self.application.persistence.store_data.chat_data and self._chat_id is not None:
await self.application.persistence.refresh_chat_data(
chat_id=self._chat_id,
chat_data=self.chat_data, # type: ignore[arg-type]
)
if self.application.persistence.store_data.user_data and self._user_id is not None:
await self.application.persistence.refresh_user_data(
user_id=self._user_id,
user_data=self.user_data, # type: ignore[arg-type]
)
def drop_callback_data(self, callback_query: CallbackQuery) -> None:
"""
Deletes the cached data for the specified callback query.
.. versionadded:: 13.6
Note:
Will *not* raise exceptions in case the data is not found in the cache.
*Will* raise :exc:`KeyError` in case the callback query can not be found in the cache.
.. seealso:: :wiki:`Arbitrary callback_data <Arbitrary-callback_data>`
Args:
callback_query (:class:`telegram.CallbackQuery`): The callback query.
Raises:
KeyError | RuntimeError: :exc:`KeyError`, if the callback query can not be found in
the cache and :exc:`RuntimeError`, if the bot doesn't allow for arbitrary
callback data.
"""
if isinstance(self.bot, ExtBot):
if self.bot.callback_data_cache is None:
raise RuntimeError(
"This telegram.ext.ExtBot instance does not use arbitrary callback data."
)
self.bot.callback_data_cache.drop_data(callback_query)
else:
raise RuntimeError("telegram.Bot does not allow for arbitrary callback data.")
@classmethod
def from_error(
cls: Type["CCT"],
update: object,
error: Exception,
application: "Application[BT, CCT, UD, CD, BD, Any]",
job: Optional["Job[Any]"] = None,
coroutine: Optional[
Union[Generator[Optional["Future[object]"], None, Any], Awaitable[Any]]
] = None,
) -> "CCT":
"""
Constructs an instance of :class:`telegram.ext.CallbackContext` to be passed to the error
handlers.
.. seealso:: :meth:`telegram.ext.Application.add_error_handler`
.. versionchanged:: 20.0
Removed arguments ``async_args`` and ``async_kwargs``.
Args:
update (:obj:`object` | :class:`telegram.Update`): The update associated with the
error. May be :obj:`None`, e.g. for errors in job callbacks.
error (:obj:`Exception`): The error.
application (:class:`telegram.ext.Application`): The application associated with this
context.
job (:class:`telegram.ext.Job`, optional): The job associated with the error.
.. versionadded:: 20.0
coroutine (:term:`awaitable`, optional): The awaitable associated
with this error if the error was caused by a coroutine run with
:meth:`Application.create_task` or a handler callback with
:attr:`block=False <BaseHandler.block>`.
.. versionadded:: 20.0
.. versionchanged:: 20.2
Accepts :class:`asyncio.Future` and generator-based coroutine functions.
Returns:
:class:`telegram.ext.CallbackContext`
"""
# update and job will never be present at the same time
if update is not None:
self = cls.from_update(update, application)
elif job is not None:
self = cls.from_job(job, application)
else:
self = cls(application) # type: ignore
self.error = error
self.coroutine = coroutine
return self
@classmethod
def from_update(
cls: Type["CCT"],
update: object,
application: "Application[Any, CCT, Any, Any, Any, Any]",
) -> "CCT":
"""
Constructs an instance of :class:`telegram.ext.CallbackContext` to be passed to the
handlers.
.. seealso:: :meth:`telegram.ext.Application.add_handler`
Args:
update (:obj:`object` | :class:`telegram.Update`): The update.
application (:class:`telegram.ext.Application`): The application associated with this
context.
Returns:
:class:`telegram.ext.CallbackContext`
"""
if isinstance(update, Update):
chat = update.effective_chat
user = update.effective_user
chat_id = chat.id if chat else None
user_id = user.id if user else None
return cls(application, chat_id=chat_id, user_id=user_id) # type: ignore
return cls(application) # type: ignore
@classmethod
def from_job(
cls: Type["CCT"],
job: "Job[CCT]",
application: "Application[Any, CCT, Any, Any, Any, Any]",
) -> "CCT":
"""
Constructs an instance of :class:`telegram.ext.CallbackContext` to be passed to a
job callback.
.. seealso:: :meth:`telegram.ext.JobQueue`
Args:
job (:class:`telegram.ext.Job`): The job.
application (:class:`telegram.ext.Application`): The application associated with this
context.
Returns:
:class:`telegram.ext.CallbackContext`
"""
self = cls(application, chat_id=job.chat_id, user_id=job.user_id) # type: ignore
self.job = job
return self
def update(self, data: Dict[str, object]) -> None:
"""Updates ``self.__slots__`` with the passed data.
Args:
data (Dict[:obj:`str`, :obj:`object`]): The data.
"""
for key, value in data.items():
setattr(self, key, value)
@property
def bot(self) -> BT:
""":class:`telegram.Bot`: The bot associated with this context."""
return self._application.bot
@property
def job_queue(self) -> Optional["JobQueue[CCT]"]:
"""
:class:`telegram.ext.JobQueue`: The :class:`JobQueue` used by the
:class:`telegram.ext.Application`.
.. seealso:: :wiki:`Job Queue <Extensions---JobQueue>`
"""
if self._application._job_queue is None: # pylint: disable=protected-access
warn(
"No `JobQueue` set up. To use `JobQueue`, you must install PTB via "
'`pip install "python-telegram-bot[job-queue]"`.',
stacklevel=2,
)
return self._application._job_queue # pylint: disable=protected-access
@property
def update_queue(self) -> "Queue[object]":
"""
:class:`asyncio.Queue`: The :class:`asyncio.Queue` instance used by the
:class:`telegram.ext.Application` and (usually) the :class:`telegram.ext.Updater`
associated with this context.
"""
return self._application.update_queue
@property
def match(self) -> Optional[Match[str]]:
"""
:meth:`re.Match <re.Match.expand>`: The first match from :attr:`matches`.
Useful if you are only filtering using a single regex filter.
Returns :obj:`None` if :attr:`matches` is empty.
"""
try:
return self.matches[0] # type: ignore[index] # pylint: disable=unsubscriptable-object
except (IndexError, TypeError):
return None