''' handles all the activity coming out of the server '''
import re
from django.db import IntegrityError, transaction
from django.http import JsonResponse
from django.shortcuts import get_object_or_404
from django.views.decorators.csrf import csrf_exempt
from django.views.decorators.http import require_GET
from markdown import markdown
from requests import HTTPError
from bookwyrm import activitypub
from bookwyrm import models
from bookwyrm.connectors import get_data, ConnectorException
from bookwyrm.broadcast import broadcast
from bookwyrm.sanitize_html import InputHtmlParser
from bookwyrm.status import create_notification
from bookwyrm.status import create_generated_note
from bookwyrm.status import delete_status
from bookwyrm.settings import DOMAIN
from bookwyrm.utils import regex
@csrf_exempt
@require_GET
def outbox(request, username):
''' outbox for the requested user '''
user = get_object_or_404(models.User, localname=username)
filter_type = request.GET.get('type')
if filter_type not in models.status_models:
filter_type = None
return JsonResponse(
user.to_outbox(**request.GET, filter_type=filter_type),
encoder=activitypub.ActivityEncoder
)
def handle_remote_webfinger(query):
''' webfingerin' other servers '''
user = None
# usernames could be @user@domain or user@domain
if not query:
return None
if query[0] == '@':
query = query[1:]
try:
domain = query.split('@')[1]
except IndexError:
return None
try:
user = models.User.objects.get(username=query)
except models.User.DoesNotExist:
url = 'https://%s/.well-known/webfinger?resource=acct:%s' % \
(domain, query)
try:
data = get_data(url)
except (ConnectorException, HTTPError):
return None
for link in data.get('links'):
if link.get('rel') == 'self':
try:
user = activitypub.resolve_remote_id(
models.User, link['href']
)
except KeyError:
return None
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()
broadcast(user, activity, privacy='direct', direct_recipients=[to_follow])
def handle_unfollow(user, to_unfollow):
''' someone local wants to follow someone '''
relationship = models.UserFollows.objects.get(
user_subject=user,
user_object=to_unfollow
)
activity = relationship.to_undo_activity(user)
broadcast(user, activity, privacy='direct', direct_recipients=[to_unfollow])
to_unfollow.followers.remove(user)
def handle_accept(follow_request):
''' send an acceptance message to a follow request '''
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()
broadcast(to_follow, activity, privacy='direct', direct_recipients=[user])
def handle_reject(follow_request):
''' a local user who managed follows rejects a follow request '''
user = follow_request.user_subject
to_follow = follow_request.user_object
activity = follow_request.to_reject_activity()
follow_request.delete()
broadcast(to_follow, activity, privacy='direct', direct_recipients=[user])
def handle_shelve(user, book, shelf):
''' 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))
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 '''
# tell the world about this cool thing that happened
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
status = create_generated_note(
user,
message,
mention_books=[book],
privacy=privacy
)
status.save()
broadcast(user, status.to_create_activity(user))
def handle_imported_book(user, item, include_reviews, privacy):
''' 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
existing_shelf = models.ShelfBook.objects.filter(
book=item.book, added_by=user).exists()
# shelve the book if it hasn't been shelved already
if item.shelf and not existing_shelf:
desired_shelf = models.Shelf.objects.get(
identifier=item.shelf,
user=user
)
shelf_book = models.ShelfBook.objects.create(
book=item.book, shelf=desired_shelf, added_by=user)
broadcast(user, shelf_book.to_add_activity(user), privacy=privacy)
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)
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))
def handle_status(user, form):
''' generic handler for statuses '''
status = form.save(commit=False)
if not status.sensitive and status.content_warning:
# the cw text field remains populated when you click "remove"
status.content_warning = None
status.save()
# inspect the text for user tags
content = status.content
for (mention_text, mention_user) in find_mentions(content):
# add them to status mentions fk
status.mention_users.add(mention_user)
# turn the mention into a link
content = re.sub(
r'%s([^@]|$)' % mention_text,
r'%s\g<1>' % \
(mention_user.remote_id, mention_text),
content)
# add reply parent to mentions and notify
if status.reply_parent:
status.mention_users.add(status.reply_parent.user)
for mention_user in status.reply_parent.mention_users.all():
status.mention_users.add(mention_user)
if status.reply_parent.user.local:
create_notification(
status.reply_parent.user,
'REPLY',
related_user=user,
related_status=status
)
# deduplicate mentions
status.mention_users.set(set(status.mention_users.all()))
# create mention notifications
for mention_user in status.mention_users.all():
if status.reply_parent and mention_user == status.reply_parent.user:
continue
if mention_user.local:
create_notification(
mention_user,
'MENTION',
related_user=user,
related_status=status
)
# don't apply formatting to generated notes
if not isinstance(status, models.GeneratedNote):
status.content = to_markdown(content)
# do apply formatting to quotes
if hasattr(status, 'quote'):
status.quote = to_markdown(status.quote)
status.save()
broadcast(user, status.to_create_activity(user), software='bookwyrm')
# re-format the activity for non-bookwyrm servers
remote_activity = status.to_create_activity(user, pure=True)
broadcast(user, remote_activity, software='other')
def find_mentions(content):
''' detect @mentions in raw status content '''
for match in re.finditer(regex.strict_username, content):
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)
mention_user = handle_remote_webfinger(username)
if not mention_user:
# we can ignore users we don't know about
continue
yield (match.group(), mention_user)
def format_links(content):
''' detect and format links '''
return re.sub(
r'([^(href=")]|^)(https?:\/\/(%s([\w\.\-_\/+&\?=:;,])*))' % \
regex.domain,
r'\g<1>\g<3>',
content)
def to_markdown(content):
''' catch links and convert to markdown '''
content = format_links(content)
content = markdown(content)
# sanitize resulting html
sanitizer = InputHtmlParser()
sanitizer.feed(content)
return sanitizer.get_output()
def handle_favorite(user, status):
''' 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()
broadcast(
user, fav_activity, privacy='direct', direct_recipients=[status.user])
create_notification(
status.user,
'FAVORITE',
related_user=user,
related_status=status
)
def handle_unfavorite(user, status):
''' 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 = favorite.to_undo_activity(user)
favorite.delete()
broadcast(user, fav_activity, direct_recipients=[status.user])
def handle_boost(user, status):
''' a user wishes to boost a status '''
# is it boostable?
if not status.boostable:
return
if models.Boost.objects.filter(
boosted_status=status, user=user).exists():
# you already boosted that.
return
boost = models.Boost.objects.create(
boosted_status=status,
privacy=status.privacy,
user=user,
)
boost_activity = boost.to_activity()
broadcast(user, boost_activity)
create_notification(
status.user,
'BOOST',
related_user=user,
related_status=status
)
def handle_unboost(user, status):
''' a user regrets boosting a status '''
boost = models.Boost.objects.filter(
boosted_status=status, user=user
).first()
activity = boost.to_undo_activity(user)
boost.delete()
broadcast(user, activity)
def handle_update_book_data(user, item):
''' broadcast the news about our book '''
broadcast(user, item.to_update_activity(user))
def handle_update_user(user):
''' broadcast editing a user's profile '''
broadcast(user, user.to_update_activity(user))