# Copyright 2017 Workonline Communications (Pty) Ltd. All rights reserved.
#
# The contents of this file are 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.
"""Helper functions for djangolg view classes."""

from __future__ import print_function
from __future__ import unicode_literals

from django.http import HttpRequest

from djangolg import exceptions


def get_src(request=None):
    """Get the source address of a request."""
    address = None
    exceptions.check_type(request, HttpRequest)
    if request.META:
        if 'HTTP_X_FORWARDED_FOR' in request.META:
            address = "{0}"\
                .format(request.META['HTTP_X_FORWARDED_FOR'].split(',')[0])
        else:
            address = "{0}".format(request.META['REMOTE_ADDR'])
    return address
