#!/usr/bin/perl -w
# Depends: libtime-modules-perl

# Copyright (c) 2016 Peter Palfrader <peter@palfrader.org>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

use strict;
use Time::ParseDate;

$SIG{'INT'} = 'IGNORE'; # so mutt even shows it if I ^C the pgp stuff.

my $foundit = 0;
while (<>) {
	if (!$foundit && /^Date:(.*)/i) {
		$foundit++; 
		my $s = parsedate($1); # parse it
		if ($s) {
			# and recreate the date ourselves so we don't inject
			# evil stuff to our shell
			my $d = localtime($s);
			my $date = `date -R -d "$d"`;
			print "Local-Date: $date";
		} else {
			print "Local-Date: <could not parse Date header>\n";
		}
	};
	print;
};