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# Copyright 2014  Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=


import re

import pgpwordlist


def get_ticket_ids(settings, args):
    filename = settings['ticket-id-from']
    if filename:
        return _read_ticket_ids_from_file(filename)
    else:
        return _ticket_ids_from_words(args)


def _read_ticket_ids_from_file(filename):
    with open(filename) as f:
        return [line.strip() for line in f.readlines()]


def _ticket_ids_from_words(args):
    ticket_ids = []
    for arg in args:
        if _is_hex(arg):
            ticket_ids.append(arg)
        else:
            assert arg is not None, 'xxx: arg=%r' % arg
            ticket_ids.append(pgpwordlist.words_to_hex(arg))
    return ticket_ids


_hex_pat = re.compile(r'^[0-9a-fA-F]+$')


def _is_hex(arg):
    return _hex_pat.match(arg) is not None