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error_handler.py
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# Hydrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2023-present Hydrogram <https://hydrogram.org>
#
# This file is part of Hydrogram.
#
# Hydrogram is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Hydrogram 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 General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Hydrogram. If not, see <http://www.gnu.org/licenses/>.
from __future__ import annotations
from collections.abc import Iterable
from typing import TYPE_CHECKING, Callable
from .handler import Handler
if TYPE_CHECKING:
import hydrogram
from hydrogram.types import Update
class ErrorHandler(Handler):
"""The Error handler class. Used to handle errors.
It is intended to be used with :meth:`~hydrogram.Client.add_handler`
For a nicer way to register this handler, have a look at the
:meth:`~hydrogram.Client.on_error` decorator.
Parameters:
callback (``Callable``):
Pass a function that will be called when a new Error arrives. It takes *(client, error)*
as positional arguments (look at the section below for a detailed description).
exceptions (``Exception`` | Iterable of ``Exception``, *optional*):
Pass one or more exception classes to allow only a subset of errors to be passed
in your callback function.
Other parameters:
client (:obj:`~hydrogram.Client`):
The Client itself, useful when you want to call other API methods inside the error handler.
update (:obj:`~hydrogram.Update`):
The update that caused the error.
error (``Exception``):
The error that was raised.
"""
def __init__(
self,
callback: Callable,
exceptions: type[Exception] | Iterable[type[Exception]] | None = None,
):
self.exceptions = (
tuple(exceptions)
if isinstance(exceptions, Iterable)
else (exceptions,)
if exceptions
else (Exception,)
)
super().__init__(callback)
async def check(self, client: hydrogram.Client, update: Update, exception: Exception) -> bool:
if isinstance(exception, self.exceptions):
await self.callback(client, update, exception)
return True
return False
def check_remove(self, error: type[Exception] | Iterable[type[Exception]]) -> bool:
return isinstance(error, self.exceptions)