from abc import ABCMeta
from neomodel import db


class NodeUtils:
    __metaclass__ = ABCMeta


    def serialize_relationships(self, nodes):
        serialized_nodes = []
        for node in nodes:
            # serialize node
            serialized_node = node.serialize

            # UNCOMMENT to get relationship type
            # results, colums = self.cypher('''
            #     START start_node=node({self}), end_node=node({end_node})
            #     MATCH (start_node)-[rel]-(end_node)
            #     RETURN type(rel) as node_relationship
            #     ''',
            #     {'end_node': node.id}
            # )
            # serialized_node['node_relationship'] = results[0][0]

            serialized_nodes.append(serialized_node)

        return serialized_nodes