#!/usr/bin/perl

# restore_dates.pl -- author: Oliver Bossert
# Copyright (C) 2004 Oliver Bossert
#
# 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 2
# of the License, or 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

use strict;
use warnings;

use File::Find;
use Digest::MD5;

my %data = ();
my $FILE = ".savedates";
open (F1, ".savedates") or die "Could not read file!";
while(<F1>) {
  chomp;
  my @a = split /\s+/, $_;
  $data{$a[0]}->{md5} = $a[1];
  $data{$a[0]}->{at} = $a[2];
  $data{$a[0]}->{mt} = $a[3];
}
close F1;


find sub { 

  my $omd5 = Digest::MD5->new;
  open(F, $_) or die "Can't open '$_': $!";
  binmode(F);
  while (<F>) {
    $_ =~ s/date\" content=\"[^\"]+\"//;
    $omd5->add($_);
  }
  my $md5 = $omd5->b64digest; #Digest::MD5->new->addfile(*F)->hexdigest;
  close F;

  if (defined($data{$File::Find::name}) && $md5 eq $data{$File::Find::name}->{md5} ) {
    utime($data{$File::Find::name}->{at}, $data{$File::Find::name}->{mt}, $File::Find::name);
  } else {
    print $File::Find::name . " was modified: " .$md5 . " != " . $data{$File::Find::name}->{md5} . "...\n";
  }

}, ".";