OpenSlides/openslides/core/apps.py

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from collections import OrderedDict
from operator import attrgetter
from typing import Any, Dict, List, Set
from django.apps import AppConfig
from django.conf import settings
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from django.core.exceptions import ImproperlyConfigured
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from django.db.models.signals import post_migrate
from django.db.utils import OperationalError, ProgrammingError
from ..utils.projector import register_projector_elements
class CoreAppConfig(AppConfig):
name = 'openslides.core'
verbose_name = 'OpenSlides Core'
angular_site_module = True
angular_projector_module = True
def ready(self):
# Import all required stuff.
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from .config import config
from ..utils.rest_api import router
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from ..utils.cache import element_cache
from .projector import get_projector_elements
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from .signals import (
delete_django_app_permissions,
get_permission_change_data,
permission_change,
post_permission_creation,
)
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from .views import (
ChatMessageViewSet,
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ConfigViewSet,
CountdownViewSet,
ProjectorMessageViewSet,
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ProjectorViewSet,
TagViewSet,
)
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from ..utils.constants import set_constants, get_constants_from_apps
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from .websocket import (
NotifyWebsocketClientMessage,
ConstantsWebsocketClientMessage,
GetElementsWebsocketClientMessage,
AutoupdateWebsocketClientMessage,
)
from ..utils.websocket import register_client_message
from ..utils.access_permissions import required_user
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# Collect all config variables before getting the constants.
config.collect_config_variables_from_apps()
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# Set constants
try:
set_constants(get_constants_from_apps())
except (ImproperlyConfigured, OperationalError, ProgrammingError):
# Database is not loaded. This happens in tests and migrations.
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pass
# Define projector elements.
register_projector_elements(get_projector_elements())
# Connect signals.
post_permission_creation.connect(
delete_django_app_permissions,
dispatch_uid='delete_django_app_permissions')
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permission_change.connect(
get_permission_change_data,
dispatch_uid='core_get_permission_change_data')
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post_migrate.connect(call_save_default_values, sender=self, dispatch_uid='core_save_config_default_values')
# Register viewsets.
router.register(self.get_model('Projector').get_collection_string(), ProjectorViewSet)
router.register(self.get_model('ChatMessage').get_collection_string(), ChatMessageViewSet)
router.register(self.get_model('Tag').get_collection_string(), TagViewSet)
router.register(self.get_model('ConfigStore').get_collection_string(), ConfigViewSet, 'config')
router.register(self.get_model('ProjectorMessage').get_collection_string(), ProjectorMessageViewSet)
router.register(self.get_model('Countdown').get_collection_string(), CountdownViewSet)
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# Sets the cache
try:
element_cache.ensure_cache()
except (ImproperlyConfigured, OperationalError, ProgrammingError):
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# This happens in the tests or in migrations. Do nothing
pass
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# Register client messages
register_client_message(NotifyWebsocketClientMessage())
register_client_message(ConstantsWebsocketClientMessage())
register_client_message(GetElementsWebsocketClientMessage())
register_client_message(AutoupdateWebsocketClientMessage())
# register required_users
required_user.add_collection_string(self.get_model('ChatMessage').get_collection_string(), required_users)
def get_config_variables(self):
from .config_variables import get_config_variables
return get_config_variables()
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def get_startup_elements(self):
"""
Yields all Cachables required on startup i. e. opening the websocket
connection.
"""
for model_name in ('Projector', 'ChatMessage', 'Tag', 'ProjectorMessage', 'Countdown', 'ConfigStore'):
yield self.get_model(model_name)
def get_angular_constants(self):
from .config import config
constants: Dict[str, Any] = {}
# Client settings
client_settings_keys = [
'MOTION_IDENTIFIER_MIN_DIGITS',
'MOTION_IDENTIFIER_WITHOUT_BLANKS',
'MOTIONS_ALLOW_AMENDMENTS_OF_AMENDMENTS'
]
client_settings_dict = {}
for key in client_settings_keys:
try:
client_settings_dict[key] = getattr(settings, key)
except AttributeError:
# Settings key does not exist. Do nothing. The client will
# treat this as undefined.
pass
constants['OpenSlidesSettings'] = client_settings_dict
# Config variables
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config_groups: List[Any] = []
for config_variable in sorted(config.config_variables.values(), key=attrgetter('weight')):
if config_variable.is_hidden():
# Skip hidden config variables. Do not even check groups and subgroups.
continue
if not config_groups or config_groups[-1]['name'] != config_variable.group:
# Add new group.
config_groups.append(OrderedDict(
name=config_variable.group,
subgroups=[]))
if not config_groups[-1]['subgroups'] or config_groups[-1]['subgroups'][-1]['name'] != config_variable.subgroup:
# Add new subgroup.
config_groups[-1]['subgroups'].append(OrderedDict(
name=config_variable.subgroup,
items=[]))
# Add the config variable to the current group and subgroup.
config_groups[-1]['subgroups'][-1]['items'].append(config_variable.data)
constants['OpenSlidesConfigVariables'] = config_groups
return constants
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def call_save_default_values(**kwargs):
from .config import config
config.save_default_values()
def required_users(element: Dict[str, Any]) -> Set[int]:
"""
Returns all user ids that are displayed as chatters.
"""
return set(element['user_id'])