def _handle_get_node(self, result):
venue = None
for see_also in result.properties.get(str(RDFS.seeAlso), []):
venue = get_foursquare_venue_from_url(see_also)
if venue:
break
return venue
def lookup_foursquare_content(self, node_uri, foursquare_identifier=None):
"""
Looks up the foursquare details of a venue.
:param node_uri: the uri of the node to look up.
:param foursquare_identifier: the identifier of the foursquare data. If this is not provided, the node will be
fetched and the first seeAlso property from the node will be used as this parameter.
:return:
"""
def update_venue_details(venue):
# No point in continuing this exercise if certain requirements are not resolved.
if not venue:
raise RuntimeError('Venue identifier is not defined')
if not self._foursquare_client:
raise RuntimeError('Foursquare client is not defined')
# Finished checking requirements, fetch the details and update.
logger.debug('Looking up venue: %s' % venue)
venue_details = self._foursquare_client.venues(venue)
# Translate the venue details into a rdf storage payload for sending to update.
if 'venue' in venue_details:
storage_payload = StoragePayload()
foursquare_to_storage(venue_details['venue'], storage_payload)
storage_payload.about = node_uri
storage_payload.add_reference(DCTERMS.creator, self._representation_manager.representation_uri)
return self._storage_client.update_node(storage_payload)
# Attempt to look up the venue id from the details in the node.
if foursquare_identifier is None:
search_payload = StoragePayload()
search_payload.about = node_uri
promise = self._storage_client.get_node(search_payload).then(self._handle_get_node)
else:
promise = self._scheduler.promise()
venue_identifier = get_foursquare_venue_from_url(foursquare_identifier)
promise.resolved(venue_identifier)
promise = promise.then(update_venue_details)
return promise
