<gh_stars>1-10
# Copyright 2021 Prayas Energy Group(https://www.prayaspune.org/peg/)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import yaml
import os


class Loader(yaml.SafeLoader):
    """class to add include inyaml file structure
    """

    def __init__(self, stream):

        self._root = os.path.split(stream.name)[0]

        super().__init__(stream)

    def include(self, node):

        filename = os.path.join(self._root, self.construct_scalar(node))

        with open(filename, 'r') as f:
            return yaml.load(f, Loader)


Loader.add_constructor('!include', Loader.include)


def load_yaml(filepath):
    with open(filepath) as f:
        return yaml.load(f, Loader)
