#!/usr/bin/env python
#
# Copyright (C) 2011 W. Trevor King <wking@drexel.edu>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program.  If not, see
# <http://www.gnu.org/licenses/>.

"View files using mailcap-specified commands."

import mailcap as _mailcap
import mimetypes as _mimetypes
import subprocess as _subprocess


_CAPS = _mailcap.getcaps()

def view(filename, mime=None):
    if mime is None:
        mime,encoding = _mimetypes.guess_type(filename)
        if mime is None:
            return 1
        print('guessed {} for {}'.format(mime, filename))
    match = _mailcap.findmatch(_CAPS, mime, filename=filename)
    if match[0] is None:
        return 1
    print('view {} with {}'.format(filename, match[0]))
    return _subprocess.call(match[0], shell=True)


if __name__ == '__main__':
    import argparse
    import sys

    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument(
        'files', metavar='FILE', nargs='+', help='file to view')

    args = parser.parse_args()

    for filename in args.files:
        rc = view(filename)
        if rc != 0:
            sys.exit(rc)