###############################################################################
# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems)   #
# and others                                                                  #
#                                                                             #
# All rights reserved. This program and the accompanying materials            #
# are made available under the terms of the Apache License, Version 2.0       #
# which accompanies this distribution, and is available at                    #
# http://www.apache.org/licenses/LICENSE-2.0                                  #
###############################################################################
from api.responders.responder_base import ResponderBase
from bson.objectid import ObjectId


class Constants(ResponderBase):

    COLLECTION = 'constants'
    ID = '_id'

    def on_get(self, req, resp):
        self.log.debug("Getting constants with name")
        filters = self.parse_query_params(req)
        filters_requirements = {
            "name": self.require(str, mandatory=True),
        }
        self.validate_query_data(filters, filters_requirements)
        query = {"name": filters['name']}
        constant = self.get_object_by_id(self.COLLECTION, query,
                                         [ObjectId], self.ID)
        self.set_successful_response(resp, constant)
