#!/usr/bin/perl

# Copyright 2011, ByWater Solutions.
#
# This file is part of Koha.
#
# Koha 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 (at your option) any later
# version.
#
# Koha 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 Koha; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

use strict;
use warnings;

BEGIN {

    # find Koha's Perl modules
    # test carefully before changing this
    use FindBin;
    eval { require "$FindBin::Bin/../kohalib.pl" };
}

use C4::Context;
use C4::Circulation;
use C4::Dates;
use Date::Calc qw(
  Today
  Add_Delta_Days
);
use Getopt::Long;

sub usage {
    print STDERR <<USAGE;
Usage: $0  --days DAYS  [-h|--help]
   --days DAYS        (MANDATORY) anonymise patron history that is older than DAYS days.
   -v --verbose       gives a little more information
   -h --help          prints this help message, and exits, ignoring all
                      other options
USAGE
    exit $_[0];
}

my ( $help, $days, $verbose );

GetOptions(
    'h|help'       => \$help,
    'days:i'       => \$days,
    'v|verbose'    => \$verbose,
) || usage(1);

if ($help) {
    usage(0);
}

if ( !$days  ) {
    print "The days parameter is mandatory.\n\n";
    usage(1);
}

my ($year,$month,$day) = Today();
my ($newyear,$newmonth,$newday) = Add_Delta_Days ($year,$month,$day,(-1)*$days);
my $formatdate = sprintf "%4d-%02d-%02d",$newyear,$newmonth,$newday;
$verbose and print "Checkouts before $formatdate will be anonymised.\n";

my $rows = AnonymiseIssueHistory($formatdate);
$verbose and print "$rows checkouts anonymised.\n";

exit(0);