def put(self, source_name):
helper = RequestHelper(self)
source_name = urllib.unquote(source_name)
success, values = read_json_fields(helper, "url", "active", logger=logging)
if not success:
return
url, active = values
# a Feed must be sole owner of an ArtifactSource;
# fails if source already exists and is already linked to a feed
source = ArtifactSourceAccessor.get_by_name(source_name, return_none=True)
if source:
source_feed_key = Feed.get_by_source(source, keys_only=True, return_none=True)
if source_feed_key:
msg = "source '%s' is referenced by feed %s" % (source_name, source_feed_key.name())
helper.error(409, msg)
else:
source = ArtifactSourceAccessor.create(source_name)
# creates UrlResource if necessary
resource = UrlResourceAccessor.get_by_url(url, return_none=True)
if not resource:
resource = UrlResourceAccessor.create(url)
# create or update Feed
feed = Feed.get_by_source_name(source_name, return_none=True)
if feed:
feed.artifact_source = source
feed.url_resource = resource
feed.put()
else:
Feed.create(source_name, artifact_source=source, url=url, url_resource=resource, active=bool(active))
helper.set_status(204)
