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#!/usr/bin/python
#
#    Copyright (C) 2015 Siddharth Ravikumar <sravik@bgsu.edu>
#
#   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 (see COPYING).  If not, see
#   <http://www.gnu.org/licenses/>.

import os
import shlex
import time

from argparse import ArgumentParser
from os import path
from subprocess import call
from sys import exit

CP = 'cp'


def dump(from_file, to_file):
    """
    Dump from `from_file` to `to_file`
    """
    print "Dumping %s -> %s" % (from_file, to_file)
    call(shlex.split("%s %s %s" % (CP, from_file,to_file)))


def dump_files(from_dir, to_dir, delay=10, times=1):
    """Dump files from `from_dir` to `to_dir`.

    There will be a delay of `delay` seconds between dumping two
    files.

    The function will dump the files in `from_dir` `times` no. of
    times to `to_dir`
    """

    for i in xrange(times):
        for dirpath, dirnames, files in os.walk(from_dir):
            for file_ in files:
                from_file = path.join(dirpath, file_)
                to_file = path.join(to_dir, '%d-%s' % (i, file_))
                dump(from_file, to_file)
                time.sleep(delay)


if __name__ == "__main__":
    parser = ArgumentParser()
    parser.add_argument('from_dir',
                        help='Directory from which to take files to dump.')
    parser.add_argument('to_dir',
                        help='Directory to dump files to')
    parser.add_argument('-d', '--delay',
                        help="No. of seconds delay between file dumps.",
                        type=int, default=10)
    parser.add_argument('-t', '--times',
                        help="No. of times to dump the files",
                        type=int, default=1)
    args = parser.parse_args()

    if not path.isdir(args.from_dir):
        print "%s does not exists!" % args.from_dir
        exit(1)
    elif not path.isdir(args.to_dir):
        try:
            print "Making %s directory" % args.to_dir
            os.mkdirs(args.to_dir)
        except os.error, e:
            print "Error making %s" % args.to_dir
            exit(1)

    dump_files(args.from_dir, args.to_dir, args.delay, args.times)