bookwyrm/fedireads/outgoing.py
2020-02-15 13:01:42 -08:00

287 lines
8.8 KiB
Python

''' handles all the activity coming out of the server '''
from base64 import b64encode
from Crypto.PublicKey import RSA
from Crypto.Signature import pkcs1_15
from Crypto.Hash import SHA256
from datetime import datetime
from django.http import HttpResponseNotFound, JsonResponse
from django.views.decorators.csrf import csrf_exempt
import requests
from urllib.parse import urlencode
from uuid import uuid4
from fedireads import models
from fedireads.activity import create_review
from fedireads.remote_user import get_or_create_remote_user
from fedireads.broadcast import get_recipients, broadcast
from fedireads.settings import DOMAIN
@csrf_exempt
def outbox(request, username):
''' outbox for the requested user '''
user = models.User.objects.get(localname=username)
if request.method != 'GET':
return HttpResponseNotFound()
# paginated list of messages
if request.GET.get('page'):
limit = 20
min_id = request.GET.get('min_id')
max_id = request.GET.get('max_id')
path = 'https://%s%s?' % (DOMAIN, request.path)
# filters for use in the django queryset min/max
filters = {}
# params for the outbox page id
params = {'page': 'true'}
if min_id != None:
params['min_id'] = min_id
filters['id__gt'] = min_id
if max_id != None:
params['max_id'] = max_id
filters['id__lte'] = max_id
collection_id = path + urlencode(params)
messages = models.Activity.objects.filter(
user=user,
activity_type__in=['Article', 'Note'],
**filters
).all()[:limit]
outbox_page = {
'@context': 'https://www.w3.org/ns/activitystreams',
'id': collection_id,
'type': 'OrderedCollectionPage',
'partOf': 'https://oulipo.social/users/mus/outbox',
'orderedItems': [m.content for m in messages],
}
if max_id:
outbox_page['next'] = path + \
urlencode({'min_id': max_id, 'page': 'true'})
if min_id:
outbox_page['prev'] = path + \
urlencode({'max_id': min_id, 'page': 'true'})
return JsonResponse(outbox_page)
# collection overview
size = models.Review.objects.filter(user=user).count()
return JsonResponse({
'@context': 'https://www.w3.org/ns/activitystreams',
'id': '%s/outbox' % user.actor,
'type': 'OrderedCollection',
'totalItems': size,
'first': '%s/outbox?page=true' % user.actor,
'last': '%s/outbox?min_id=0&page=true' % user.actor
})
def handle_account_search(query):
''' webfingerin' other servers '''
user = None
domain = query.split('@')[1]
try:
user = models.User.objects.get(username=query)
except models.User.DoesNotExist:
url = 'https://%s/.well-known/webfinger?resource=acct:%s' % \
(domain, query)
response = requests.get(url)
if not response.ok:
response.raise_for_status()
data = response.json()
for link in data['links']:
if link['rel'] == 'self':
user = get_or_create_remote_user(link['href'])
return user
def handle_outgoing_follow(user, to_follow):
''' someone local wants to follow someone '''
uuid = uuid4()
activity = {
'@context': 'https://www.w3.org/ns/activitystreams',
'id': 'https://%s/%s' % (DOMAIN, str(uuid)),
'summary': '',
'type': 'Follow',
'actor': user.actor,
'object': to_follow.actor,
}
errors = broadcast(user, activity, [to_follow.inbox])
for error in errors:
# TODO: following masto users is returning 400
raise(error['error'])
def handle_outgoing_accept(user, to_follow, activity):
''' send an acceptance message to a follow request '''
to_follow.followers.add(user)
activity = {
'@context': 'https://www.w3.org/ns/activitystreams',
'id': 'https://%s/%s#accepts/follows/' % (DOMAIN, to_follow.localname),
'type': 'Accept',
'actor': to_follow.actor,
'object': activity,
}
recipient = get_recipients(
to_follow,
'direct',
direct_recipients=[user]
)
broadcast(to_follow, activity, recipient)
def handle_shelve(user, book, shelf):
''' a local user is getting a book put on their shelf '''
# update the database
models.ShelfBook(book=book, shelf=shelf, added_by=user).save()
# send out the activitypub action
summary = '%s marked %s as %s' % (
user.username,
book.data['title'],
shelf.name
)
uuid = uuid4()
activity = {
'@context': 'https://www.w3.org/ns/activitystreams',
'id': str(uuid),
'summary': summary,
'type': 'Add',
'actor': user.actor,
'object': {
'type': 'Document',
'name': book.data['title'],
'url': book.openlibrary_key
},
'target': {
'type': 'Collection',
'name': shelf.name,
'id': shelf.activitypub_id
}
}
recipients = get_recipients(user, 'public')
models.ShelveActivity(
uuid=uuid,
user=user,
content=activity,
shelf=shelf,
book=book,
).save()
broadcast(user, activity, recipients)
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)
row.delete()
# send out the activitypub action
summary = '%s removed %s from %s' % (
user.username,
book.data['title'],
shelf.name
)
uuid = uuid4()
activity = {
'@context': 'https://www.w3.org/ns/activitystreams',
'id': str(uuid),
'summary': summary,
'type': 'Remove',
'actor': user.actor,
'object': {
'type': 'Document',
'name': book.data['title'],
'url': book.openlibrary_key
},
'target': {
'type': 'Collection',
'name': shelf.name,
'id': shelf.activitypub_id
}
}
recipients = get_recipients(user, 'public')
models.ShelveActivity(
uuid=uuid,
user=user,
content=activity,
shelf=shelf,
book=book,
activity_type='Remove',
).save()
broadcast(user, activity, recipients)
def handle_review(user, book, name, content, rating):
''' post a review '''
# validated and saves the review in the database so it has an id
review = create_review(user, book, name, content, rating)
review_path = 'https://%s/user/%s/status/%d' % \
(DOMAIN, user.localname, review.id)
book_path = 'https://%s/book/%s' % (DOMAIN, review.book.openlibrary_key)
now = datetime.utcnow().isoformat() #TODO: should this be http_date?
review_activity = {
'id': review_path,
'url': review_path,
'inReplyTo': book_path,
'published': now,
'attributedTo': user.actor,
# TODO: again, assuming all posts are public
'to': ['https://www.w3.org/ns/activitystreams#Public'],
'cc': ['https://%s/user/%s/followers' % (DOMAIN, user.localname)],
'sensitive': False, # TODO: allow content warning/sensitivity
'content': content,
'type': 'Note',
'fedireadsType': 'Review',
'name': name,
'rating': rating, # fedireads-only custom field
'attachment': [], # TODO: the book cover
'replies': {
'id': '%s/replies' % review_path,
'type': 'Collection',
'first': {
'type': 'CollectionPage',
'next': '%s/replies?only_other_accounts=true&page=true' % \
review_path,
'partOf': '%s/replies' % review_path,
'items': [], # TODO: populate with replies
}
}
}
review.activity = review_activity
review.save()
signer = pkcs1_15.new(RSA.import_key(user.private_key))
signed_message = signer.sign(SHA256.new(content.encode('utf8')))
create_activity = {
'@context': 'https://www.w3.org/ns/activitystreams',
'id': '%s/activity' % review_path,
'type': 'Create',
'actor': user.actor,
'published': now,
'to': ['%s/followers' % user.actor],
'cc': ['https://www.w3.org/ns/activitystreams#Public'],
'object': review_activity,
'signature': {
'type': 'RsaSignature2017',
'creator': 'https://%s/user/%s#main-key' % (DOMAIN, user.localname),
'created': now,
'signatureValue': b64encode(signed_message).decode('utf8'),
}
}
recipients = get_recipients(user, 'public')
broadcast(user, create_activity, recipients)