def get_or_create_book(self, remote_id):
""" translate arbitrary json into an Activitypub dataclass """
# first, check if we have the origin_id saved
existing = models.Edition.find_existing_by_remote_id(
remote_id) or models.Work.find_existing_by_remote_id(remote_id)
if existing:
if hasattr(existing, "get_default_editon"):
return existing.get_default_editon()
return existing
# load the json
data = get_data(remote_id)
mapped_data = dict_from_mappings(data, self.book_mappings)
if self.is_work_data(data):
try:
edition_data = self.get_edition_from_work_data(data)
except (KeyError, ConnectorException):
# hack: re-use the work data as the edition data
# this is why remote ids aren't necessarily unique
edition_data = data
work_data = mapped_data
else:
try:
work_data = self.get_work_from_edition_data(data)
work_data = dict_from_mappings(work_data, self.book_mappings)
except (KeyError, ConnectorException):
work_data = mapped_data
edition_data = data
if not work_data or not edition_data:
raise ConnectorException("Unable to load book data: %s" %
remote_id)
with transaction.atomic():
# create activitypub object
work_activity = activitypub.Work(**work_data)
# this will dedupe automatically
work = work_activity.to_model(model=models.Work)
for author in self.get_authors_from_data(data):
work.authors.add(author)
edition = self.create_edition_from_data(work, edition_data)
load_more_data.delay(self.connector.id, work.id)
return edition
def handle_update_work(activity):
''' a remote instance changed a book (Document) '''
activitypub.Work(**activity['object']).to_model(models.Work)