#
# Copyright (c) 2017 ThoughtWorks, Inc.
#
# Pixelated is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pixelated is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with Pixelated. If not, see <http://www.gnu.org/licenses/>.


def parse_accept_language(all_headers):
    accepted_languages = ['pt-BR', 'en-US']
    languages = all_headers.get('accept-language', '').split(';')[0]
    for language in accepted_languages:
        if language in languages:
            return language
    return 'en-US'