def setarc(_resp, arc, origin_id, destination_id):
arc_cls = all_arcs.get(arc)
arc_count = Arc.query(Arc.origin == to_node_key(origin_id), Arc.destination == to_node_key(destination_id)).count()
if arc_count > 0:
_resp.write("Arc already exists")
else:
arc_cls(origin=to_node_key(origin_id), destination=to_node_key(destination_id)).put()
_resp.write("Arc Created")
def find(_resp, id, arc=None):
if arc:
arc_cls = all_arcs.get(arc)
destinations = DestinationsSearch(arc_cls, id).execute().result
destination_dct_list = [__extract_dct(d) for d in destinations]
js = json.dumps(destination_dct_list)
_resp.write(js)
else:
node = NodeSearch(id).execute().result
js = json.dumps(__extract_dct(node))
_resp.write(js)
