/
signals.py
154 lines (120 loc) · 4.81 KB
/
signals.py
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from django.contrib.auth import get_user_model
from django.db import transaction
from django.db.models.signals import pre_delete
from django.dispatch import Signal, receiver
from misago.categories.models import Category
from misago.categories.signals import delete_category_content, move_category_content
from misago.core.pgutils import batch_delete, batch_update
from misago.users.signals import delete_user_content, username_changed
from .models import Attachment, Poll, PollVote, Post, PostEdit, PostLike, Thread
delete_post = Signal()
delete_thread = Signal()
merge_post = Signal(providing_args=["other_post"])
merge_thread = Signal(providing_args=["other_thread"])
move_post = Signal()
move_thread = Signal()
@receiver(merge_thread)
def merge_threads_posts(sender, **kwargs):
other_thread = kwargs['other_thread']
other_thread.post_set.update(
category=sender.category,
thread=sender,
)
@receiver(merge_post)
def merge_posts(sender, **kwargs):
other_post = kwargs['other_post']
for user in sender.mentions.iterator():
other_post.mentions.add(user)
@receiver(move_thread)
def move_thread_content(sender, **kwargs):
sender.post_set.update(category=sender.category)
sender.postedit_set.update(category=sender.category)
sender.postlike_set.update(category=sender.category)
sender.pollvote_set.update(category=sender.category)
sender.subscription_set.update(category=sender.category)
Poll.objects.filter(thread=sender).update(category=sender.category)
@receiver(delete_category_content)
def delete_category_threads(sender, **kwargs):
sender.subscription_set.all().delete()
sender.pollvote_set.all().delete()
sender.poll_set.all().delete()
sender.postlike_set.all().delete()
sender.thread_set.all().delete()
sender.postedit_set.all().delete()
sender.post_set.all().delete()
@receiver(move_category_content)
def move_category_threads(sender, **kwargs):
new_category = kwargs['new_category']
sender.thread_set.update(category=new_category)
sender.post_set.filter(category=sender).update(category=new_category)
sender.postedit_set.filter(category=sender).update(category=new_category)
sender.postlike_set.filter(category=sender).update(category=new_category)
sender.poll_set.filter(category=sender).update(category=new_category)
sender.pollvote_set.update(category=new_category)
sender.subscription_set.update(category=new_category)
@receiver(delete_user_content)
def delete_user_threads(sender, **kwargs):
recount_categories = set()
recount_threads = set()
for thread in batch_delete(sender.thread_set.all(), 50):
recount_categories.add(thread.category_id)
with transaction.atomic():
thread.delete()
for post in batch_delete(sender.post_set.all(), 50):
recount_categories.add(post.category_id)
recount_threads.add(post.thread_id)
with transaction.atomic():
post.delete()
if recount_threads:
changed_threads_qs = Thread.objects.filter(id__in=recount_threads)
for thread in batch_update(changed_threads_qs, 50):
thread.synchronize()
thread.save()
if recount_categories:
for category in Category.objects.filter(id__in=recount_categories):
category.synchronize()
category.save()
@receiver(username_changed)
def update_usernames(sender, **kwargs):
Thread.objects.filter(starter=sender).update(
starter_name=sender.username,
starter_slug=sender.slug,
)
Thread.objects.filter(last_poster=sender).update(
last_poster_name=sender.username,
last_poster_slug=sender.slug,
)
Post.objects.filter(poster=sender).update(
poster_name=sender.username,
)
Post.objects.filter(last_editor=sender).update(
last_editor_name=sender.username,
last_editor_slug=sender.slug,
)
PostEdit.objects.filter(editor=sender).update(
editor_name=sender.username,
editor_slug=sender.slug,
)
PostLike.objects.filter(liker=sender).update(
liker_name=sender.username,
liker_slug=sender.slug,
)
Attachment.objects.filter(uploader=sender).update(
uploader_name=sender.username,
uploader_slug=sender.slug,
)
Poll.objects.filter(poster=sender).update(
poster_name=sender.username,
poster_slug=sender.slug,
)
PollVote.objects.filter(voter=sender).update(
voter_name=sender.username,
voter_slug=sender.slug,
)
@receiver(pre_delete, sender=get_user_model())
def remove_unparticipated_private_threads(sender, **kwargs):
threads_qs = kwargs['instance'].privatethread_set.all()
for thread in batch_update(threads_qs, 50):
if thread.participants.count() == 1:
with transaction.atomic():
thread.delete()