char2XCompose

#!/usr/bin/env python3

from typing import Callable
from argparse import ArgumentParser
from toXComposeTools import char2xc, char2xc_web


def main(char: str, keys: str,
         user_char2xc: Callable[[str, str], str]) -> None:

    if '<Multi_key>' not in keys[0:11]:
        keys = '<Multi_key> ' + keys
    print(user_char2xc(char, keys))


if __name__ == '__main__':
    args = ArgumentParser(
        description="Returns a string formatted for inclusion in XCompose")

    args.add_argument('char', help='The character to look up')
    args.add_argument('--keys',
                      default='<Multi_key> ',
                      type=str,
                      help='Key combo string for XCompose.')
    args.add_argument('-w', '--web',
                      action='store_true',
                      help='Use Internet resources to obtain \
                unicode character data.')

    args = args.parse_args()

    if args.char is None:
        raise ValueError('Must specify a character to lookup.')
    if len(args.char) != 1:
        raise ValueError('Must specify A SINGLE character to look up.')

    if args.web:
        user_char2xc = char2xc_web
    else:
        user_char2xc = char2xc

    main(args.char, args.keys.strip(), user_char2xc)