# Copyright (C) 2018 all contributors
# License: AGPL-3.0+
package PublicInbox::MsgTime;
use strict;
use warnings;
use base qw(Exporter);
our @EXPORT_OK = qw(msg_timestamp);
use Date::Parse qw(str2time);
use Time::Zone qw(tz_offset);
sub msg_timestamp ($) {
my ($hdr) = @_; # Email::MIME::Header
my ($ts, $zone);
my $mid;
my @recvd = $hdr->header_raw('Received');
foreach my $r (@recvd) {
$zone = undef;
$r =~ /\s*(\d+\s+[[:alpha:]]+\s+\d{2,4}\s+
\d+\D\d+(?:\D\d+)\s+([\+\-]\d+))/sx or next;
$zone = $2;
$ts = eval { str2time($1) } and last;
$mid ||= $hdr->header_raw('Message-ID');
warn "no date in $mid Received: $r\n";
}
unless (defined $ts) {
my @date = $hdr->header_raw('Date');
foreach my $d (@date) {
$zone = undef;
$ts = eval { str2time($d) };
if ($@) {
$mid ||= $hdr->header_raw('Message-ID');
warn "bad Date: $d in $mid: $@\n";
} elsif ($d =~ /\s+([\+\-]\d+)\s*\z/) {
$zone = $1;
}
}
}
$ts = time unless defined $ts;
return $ts unless wantarray;
$zone ||= '+0000';
# "-1200" is the furthest westermost zone offset,
# but git fast-import is liberal so we use "-1400"
if ($zone >= 1400 || $zone <= -1400) {
warn "bogus TZ offset: $zone, ignoring and assuming +0000\n";
$zone = '+0000';
}
($ts, $zone);
}
1;