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103 lines
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Python

from django.db import transaction
from django.db.models.signals import post_delete, post_save
from django.dispatch import receiver
from asgiref.sync import async_to_sync
from channels.layers import get_channel_layer
from submissions.models import Submission, SubmissionFile, ImageCrop, Scope
from submissions.schemas import SubmissionOut, SubmissionFileOut, ImageCropOut
# Staff see (and OCR/crop) every player's submissions, so they get every update
STAFF_GROUP_NAME = "submissions_staff"
def _broadcast_submission_event(submission: Submission, message: dict):
channel_layer = get_channel_layer()
groups = [STAFF_GROUP_NAME]
if submission.user_id:
groups.append(f"submissions_user_{submission.user_id}")
for group_name in groups:
async_to_sync(channel_layer.group_send)(group_name, message)
@receiver(post_save, sender=Submission)
def broadcast_submission_update(sender, instance, created, **kwargs):
_broadcast_submission_event(
instance,
{
"type": "submission.updated",
"submission": SubmissionOut.from_orm(instance).dict(),
},
)
@receiver(post_save, sender=SubmissionFile)
def broadcast_submission_file_update(sender, instance, created, **kwargs):
_broadcast_submission_event(
instance.submission,
{
"type": "submission.file.updated",
"file": SubmissionFileOut.from_orm(instance).dict(),
},
)
@receiver(post_save, sender=ImageCrop)
def broadcast_image_crop_update(sender, instance, created, **kwargs):
_broadcast_submission_event(
instance.submission_file.submission,
{
"type": "submission.crop.updated",
"crop": ImageCropOut.from_orm(instance).dict(),
},
)
@receiver(post_delete, sender=ImageCrop)
def broadcast_image_crop_delete(sender, instance, **kwargs):
_broadcast_submission_event(
instance.submission_file.submission,
{
"type": "submission.crop.deleted",
"crop": {
"id": str(instance.id),
"submission_file_id": str(instance.submission_file_id),
},
},
)
def broadcast_scope_updates(changes: dict[Scope, set[int]], /):
"""Tell users their scope changed (closed/opened, (un)assigned), once the
current transaction commits, so the frontend can move them to the right
match without a refresh.
Args:
changes: Changed scopes, each with every user id that was or now is
assigned to it.
"""
def send():
channel_layer = get_channel_layer()
for scope, user_ids in changes.items():
assigned_ids = set(scope.assigned_users.values_list("id", flat=True))
for user_id in user_ids:
async_to_sync(channel_layer.group_send)(
f"submissions_user_{user_id}",
{
"type": "scope.updated",
"scope": {
"id": str(scope.id),
"is_active": scope.is_active,
"assigned": user_id in assigned_ids,
},
},
)
if changes:
# robust: a websocket hiccup only gets logged, it mustn't fail the
# (already committed) sync or admin save
transaction.on_commit(send, robust=True)