OpenSlides/openslides/mediafiles/apps.py
2019-07-12 13:08:07 +02:00

64 lines
2.1 KiB
Python

from typing import Any, Dict, Set
from django.apps import AppConfig
from django.conf import settings
from django.core.exceptions import ImproperlyConfigured
class MediafilesAppConfig(AppConfig):
name = "openslides.mediafiles"
verbose_name = "OpenSlides Mediafiles"
def ready(self):
# Import all required stuff.
from openslides.core.signals import permission_change
from openslides.utils.rest_api import router
from .projector import register_projector_slides
from .signals import get_permission_change_data
from .views import MediafileViewSet
from . import serializers # noqa
from ..utils.access_permissions import required_user
# Validate, that the media_url is correct formatted:
# Must begin and end with a slash. It has to be at least "/".
media_url = settings.MEDIA_URL
if not media_url.startswith("/") or not media_url.endswith("/"):
raise ImproperlyConfigured(
"The MEDIA_URL setting must start and end with a slash"
)
# Define projector elements.
register_projector_slides()
# Connect signals.
permission_change.connect(
get_permission_change_data,
dispatch_uid="mediafiles_get_permission_change_data",
)
# Register viewsets.
router.register(
self.get_model("Mediafile").get_collection_string(), MediafileViewSet
)
# register required_users
required_user.add_collection_string(
self.get_model("Mediafile").get_collection_string(), required_users
)
def get_startup_elements(self):
"""
Yields all Cachables required on startup i. e. opening the websocket
connection.
"""
yield self.get_model("Mediafile")
def required_users(element: Dict[str, Any]) -> Set[int]:
"""
Returns all user ids that are displayed as uploaders in any mediafile
if request_user can see mediafiles. This function may return an empty
set.
"""
return set((element["uploader_id"],))