moviewyrm/bookwyrm/outgoing.py

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''' handles all the activity coming out of the server '''
import re
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from django.db import IntegrityError, transaction
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from django.http import HttpResponseNotFound, JsonResponse
from django.views.decorators.csrf import csrf_exempt
import requests
from bookwyrm import activitypub
from bookwyrm import models
from bookwyrm.broadcast import broadcast
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from bookwyrm.status import create_tag, create_notification
from bookwyrm.status import create_generated_note
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from bookwyrm.status import delete_status
from bookwyrm.remote_user import get_or_create_remote_user
from bookwyrm.settings import DOMAIN
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from bookwyrm.utils import regex
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@csrf_exempt
def outbox(request, username):
''' outbox for the requested user '''
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if request.method != 'GET':
return HttpResponseNotFound()
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try:
user = models.User.objects.get(localname=username)
except models.User.DoesNotExist:
return HttpResponseNotFound()
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# collection overview
return JsonResponse(
user.to_outbox(**request.GET),
encoder=activitypub.ActivityEncoder
)
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def handle_remote_webfinger(query):
''' webfingerin' other servers '''
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user = None
# usernames could be @user@domain or user@domain
if query[0] == '@':
query = query[1:]
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try:
domain = query.split('@')[1]
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except IndexError:
return None
try:
user = models.User.objects.get(username=query)
except models.User.DoesNotExist:
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url = 'https://%s/.well-known/webfinger?resource=acct:%s' % \
(domain, query)
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try:
response = requests.get(url)
except requests.exceptions.ConnectionError:
return None
if not response.ok:
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return None
data = response.json()
for link in data['links']:
if link['rel'] == 'self':
try:
user = get_or_create_remote_user(link['href'])
except KeyError:
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return None
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return user
def handle_follow(user, to_follow):
''' someone local wants to follow someone '''
relationship, _ = models.UserFollowRequest.objects.get_or_create(
user_subject=user,
user_object=to_follow,
)
activity = relationship.to_activity()
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broadcast(user, activity, privacy='direct', direct_recipients=[to_follow])
def handle_unfollow(user, to_unfollow):
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''' someone local wants to follow someone '''
relationship = models.UserFollows.objects.get(
user_subject=user,
user_object=to_unfollow
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)
activity = relationship.to_undo_activity(user)
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broadcast(user, activity, privacy='direct', direct_recipients=[to_unfollow])
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to_unfollow.followers.remove(user)
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def handle_accept(follow_request):
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''' send an acceptance message to a follow request '''
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user = follow_request.user_subject
to_follow = follow_request.user_object
with transaction.atomic():
relationship = models.UserFollows.from_request(follow_request)
follow_request.delete()
relationship.save()
activity = relationship.to_accept_activity()
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broadcast(to_follow, activity, privacy='direct', direct_recipients=[user])
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def handle_reject(follow_request):
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''' a local user who managed follows rejects a follow request '''
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user = follow_request.user_subject
to_follow = follow_request.user_object
activity = follow_request.to_reject_activity()
follow_request.delete()
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broadcast(to_follow, activity, privacy='direct', direct_recipients=[user])
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def handle_shelve(user, book, shelf):
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''' a local user is getting a book put on their shelf '''
# update the database
shelve = models.ShelfBook(book=book, shelf=shelf, added_by=user)
shelve.save()
broadcast(user, shelve.to_add_activity(user))
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def handle_unshelve(user, book, shelf):
''' a local user is getting a book put on their shelf '''
# update the database
row = models.ShelfBook.objects.get(book=book, shelf=shelf)
activity = row.to_remove_activity(user)
row.delete()
broadcast(user, activity)
def handle_reading_status(user, shelf, book, privacy):
''' post about a user reading a book '''
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# tell the world about this cool thing that happened
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try:
message = {
'to-read': 'wants to read',
'reading': 'started reading',
'read': 'finished reading'
}[shelf.identifier]
except KeyError:
# it's a non-standard shelf, don't worry about it
return
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status = create_generated_note(
user,
message,
mention_books=[book],
privacy=privacy
)
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status.save()
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broadcast(user, status.to_create_activity(user))
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def handle_imported_book(user, item, include_reviews, privacy):
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''' process a goodreads csv and then post about it '''
if isinstance(item.book, models.Work):
item.book = item.book.default_edition
if not item.book:
return
if item.shelf:
desired_shelf = models.Shelf.objects.get(
identifier=item.shelf,
user=user
)
# shelve the book if it hasn't been shelved already
shelf_book, created = models.ShelfBook.objects.get_or_create(
book=item.book, shelf=desired_shelf, added_by=user)
if created:
broadcast(user, shelf_book.to_add_activity(user), privacy=privacy)
# only add new read-throughs if the item isn't already shelved
for read in item.reads:
read.book = item.book
read.user = user
read.save()
if include_reviews and (item.rating or item.review):
review_title = 'Review of {!r} on Goodreads'.format(
item.book.title,
) if item.review else ''
# we don't know the publication date of the review,
# but "now" is a bad guess
published_date_guess = item.date_read or item.date_added
review = models.Review.objects.create(
user=user,
book=item.book,
name=review_title,
content=item.review,
rating=item.rating,
published_date=published_date_guess,
privacy=privacy,
)
# we don't need to send out pure activities because non-bookwyrm
# instances don't need this data
broadcast(user, review.to_create_activity(user), privacy=privacy)
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def handle_delete_status(user, status):
''' delete a status and broadcast deletion to other servers '''
delete_status(status)
broadcast(user, status.to_delete_activity(user))
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def handle_status(user, form):
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''' generic handler for statuses '''
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status = form.save()
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# inspect the text for user tags
text = status.content
matches = re.finditer(
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regex.username,
text
)
for match in matches:
username = match.group().strip().split('@')[1:]
if len(username) == 1:
# this looks like a local user (@user), fill in the domain
username.append(DOMAIN)
username = '@'.join(username)
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mention_user = handle_remote_webfinger(username)
if not mention_user:
# we can ignore users we don't know about
continue
# add them to status mentions fk
status.mention_users.add(mention_user)
# create notification if the mentioned user is local
if mention_user.local:
create_notification(
mention_user,
'MENTION',
related_user=user,
related_status=status
)
status.save()
# notify reply parent or tagged users
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if status.reply_parent and status.reply_parent.user.local:
create_notification(
status.reply_parent.user,
'REPLY',
related_user=user,
related_status=status
)
broadcast(user, status.to_create_activity(user), software='bookwyrm')
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# re-format the activity for non-bookwyrm servers
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if hasattr(status, 'pure_activity_serializer'):
remote_activity = status.to_create_activity(user, pure=True)
broadcast(user, remote_activity, software='other')
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def handle_tag(user, book, name):
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''' tag a book '''
tag = create_tag(user, book, name)
broadcast(user, tag.to_add_activity(user))
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def handle_untag(user, book, name):
''' tag a book '''
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book = models.Book.objects.get(id=book)
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tag = models.Tag.objects.get(name=name, book=book, user=user)
tag_activity = tag.to_remove_activity(user)
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tag.delete()
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broadcast(user, tag_activity)
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def handle_favorite(user, status):
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''' a user likes a status '''
try:
favorite = models.Favorite.objects.create(
status=status,
user=user
)
except IntegrityError:
# you already fav'ed that
return
fav_activity = favorite.to_activity()
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broadcast(
user, fav_activity, privacy='direct', direct_recipients=[status.user])
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def handle_unfavorite(user, status):
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''' a user likes a status '''
try:
favorite = models.Favorite.objects.get(
status=status,
user=user
)
except models.Favorite.DoesNotExist:
# can't find that status, idk
return
fav_activity = activitypub.Undo(actor=user, object=favorite)
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broadcast(user, fav_activity, direct_recipients=[status.user])
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def handle_boost(user, status):
''' a user wishes to boost a status '''
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if models.Boost.objects.filter(
boosted_status=status, user=user).exists():
# you already boosted that.
return
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boost = models.Boost.objects.create(
boosted_status=status,
user=user,
)
boost.save()
boost_activity = boost.to_activity()
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broadcast(user, boost_activity)
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def handle_update_book(user, book):
''' broadcast the news about our book '''
broadcast(user, book.to_update_activity(user))
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def handle_update_user(user):
''' broadcast editing a user's profile '''
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broadcast(user, user.to_update_activity(user))