# Copyright 2020 University Of Delhi.
#
# 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.


"""Loads PDF file into settings
"""

import json
import yaml

from tools.conf import settings

def load_pdf():
    """
    Updates settings with PDF data
    """
    filename = settings.getValue('pdf_file')
    with open(filename) as handle:
        data = handle.read()

    try:
        pdf = json.loads(data)
    except json.decoder.JSONDecodeError:
        try:
            pdf = yaml.safe_load(data)
        except yaml.parser.ParserError:
            raise Exception(f"Invalid PDF file: {filename}")

    settings.setValue('pdf_file', pdf)