#!/usr/bin/env python3.7
#
# Copyright (C) 2016 The University of Sheffield, UK
#
# 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/>.
#
# SPDX-License-Identifier: GPL-3.0-or-later
""" A tool for analyzing and extracting `*.crx` files
    (i.e., Chrome extensions)."""

import argparse
from ExtensionCrawler.crx import extract_crxfile, verify_crxfile


def main():
    """Main function of the extension crawler."""
    parser = argparse.ArgumentParser()
    parser.add_argument("file", help="chrome extension archive (*.crx)")
    parser.add_argument('targetdir', nargs='?', default="")
    parser.add_argument(
        "-c",
        "--check",
        help="verify format and signature of <file>",
        action="store_true")
    parser.add_argument(
        "-e", "--extract", help="extract <file>", action="store_true")
    parser.add_argument(
        "-f",
        "--force",
        help="apply action also to (potential) invalid files",
        action="store_true")
    parser.add_argument(
        "-v", "--verbose", help="increase verbosity", action="store_true")
    args = parser.parse_args()

    if args.extract:
        retval = extract_crxfile(args.verbose, args.force, args.file,
                                 args.targetdir)
    else:
        retval = verify_crxfile(args.verbose, args.file)

    exit(retval)


if __name__ == "__main__":
    main()