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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright (C) 2025 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
import logging
from typing import TYPE_CHECKING, Awaitable, Callable, List, Optional
from synapse.types import JsonDict
from synapse.util.async_helpers import delay_cancellation
from synapse.util.metrics import Measure
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
GET_MEDIA_CONFIG_FOR_USER_CALLBACK = Callable[[str], Awaitable[Optional[JsonDict]]]
IS_USER_ALLOWED_TO_UPLOAD_MEDIA_OF_SIZE_CALLBACK = Callable[[str, int], Awaitable[bool]]
class MediaRepositoryModuleApiCallbacks:
def __init__(self, hs: "HomeServer") -> None:
self.clock = hs.get_clock()
self._get_media_config_for_user_callbacks: List[
GET_MEDIA_CONFIG_FOR_USER_CALLBACK
] = []
self._is_user_allowed_to_upload_media_of_size_callbacks: List[
IS_USER_ALLOWED_TO_UPLOAD_MEDIA_OF_SIZE_CALLBACK
] = []
def register_callbacks(
self,
get_media_config_for_user: Optional[GET_MEDIA_CONFIG_FOR_USER_CALLBACK] = None,
is_user_allowed_to_upload_media_of_size: Optional[
IS_USER_ALLOWED_TO_UPLOAD_MEDIA_OF_SIZE_CALLBACK
] = None,
) -> None:
"""Register callbacks from module for each hook."""
if get_media_config_for_user is not None:
self._get_media_config_for_user_callbacks.append(get_media_config_for_user)
if is_user_allowed_to_upload_media_of_size is not None:
self._is_user_allowed_to_upload_media_of_size_callbacks.append(
is_user_allowed_to_upload_media_of_size
)
async def get_media_config_for_user(self, user_id: str) -> Optional[JsonDict]:
for callback in self._get_media_config_for_user_callbacks:
with Measure(self.clock, f"{callback.__module__}.{callback.__qualname__}"):
res: Optional[JsonDict] = await delay_cancellation(callback(user_id))
if res:
return res
return None
async def is_user_allowed_to_upload_media_of_size(
self, user_id: str, size: int
) -> bool:
for callback in self._is_user_allowed_to_upload_media_of_size_callbacks:
with Measure(self.clock, f"{callback.__module__}.{callback.__qualname__}"):
res: bool = await delay_cancellation(callback(user_id, size))
if not res:
return res
return True
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