#!/usr/bin/perl use 5.14.1; use warnings; our $VERSION = "1.05 - 2018-10-08"; our $cmd = $0 =~ s{.*/}{}r; sub usage { my $err = shift and select STDERR; say "usage: $cmd file ..."; exit $err; } # usage use Date::Parse; use Getopt::Long; GetOptions ( "help|?" => sub { usage (0); }, "V|version" => sub { say "$cmd [$VERSION]"; exit 0; }, ) or usage (1); my $p; my %f; foreach my $fn (@ARGV) { open my $fh, "<", $fn or die "$fn: $!\n"; my ($hdr, $body) = split m/(?<=\n)(?=\r?\n)/ => do { local $/; <$fh> }, 2; close $fh; $hdr && $hdr =~ m/\b(?:Date|Received)\b/ or next; my ($mid) = $hdr =~ m{^Message-Id: (?:[\x20\t]*\n)?[\x20\t]+ (\S.*)}xmi; my ($dte) = $hdr =~ m{^Date: (?:[\x20\t]*\n)?[\x20\t]+ (\S.*)}xmi; my ($rcv) = $hdr =~ m{\nReceived: (?:[\x20\t]*\n)?[\x20\t]+ (\S.*(?:\n\s+.*)*+)}xi; my ($irt) = $hdr =~ m{^In-Reply-To: (?:[\x20\t]*\n)?[\x20\t]+ (\S.*)}xmi; my ($ref) = $hdr =~ m{^References: (?:[\x20\t]*\n)?[\x20\t]+ (\S.*)}xmi; $rcv ||= $dte; $rcv =~ s/[\s\r\n]+/ /g; $rcv =~ s/\s+$//; $rcv =~ s/.*;\s*//; $rcv =~ s/.* id \S+\s+//i; my $stamp = str2time ($rcv) or die $rcv; my $date = $stamp ? do { my @d = localtime $stamp; sprintf "%4d-%02d-%02d %02d:%02d:%02d", $d[5] + 1900, ++$d[4], @d[3,2,1,0]; } : "-"; #printf "%12s %-20s %s\n", $stamp // "-", $date, $rcv; $f{$fn} = { msg_id => $mid, refs => $ref, irt => $irt, date => $dte, rcvd => $rcv, stamp => $stamp, sdate => $date, hdr => $hdr, body => $body, }; $p //= $fn; $stamp < $f{$p}{stamp} and $p = $fn; } # All but the oldest will refer to the oldest as parent $p or exit 0; my $pid = $f{$p}{msg_id} or die "Parent file $p has no Message-Id\n"; foreach my $fn (sort keys %f) { $fn eq $p and next; my $c = 0; my $f = $f{$fn}; if ($f->{refs}) { unless ($f->{refs} eq $pid) { $c++; $f->{hdr} =~ s{^(?=References:)}{References: $pid\nX-}mi; } } else { $c++; $f->{hdr} =~ s{^(?=Message-Id:)}{References: $pid\n}mi; } if ($f->{irt}) { unless ($f->{irt} eq $pid) { $c++; $f->{hdr} =~ s{^(?=In-Reply-To:)}{In-Reply-To: $pid\nX-}mi; } } else { $c++; $f->{hdr} =~ s{^(?=Message-Id:)}{In-Reply-To: $pid\n}mi; } $c or next; # No changes required unless ($f->{msg_id}) { warn "Child message $fn has no Message-Id, skipped\n"; next; } say "$f->{msg_id} => $pid"; my @t = stat $fn; open my $fh, ">", $fn or die "$fn: $!\n"; print $fh $f->{hdr}, $f->{body}; close $fh or die "$fn: $!\n"; utime $t[8], $t[9], $fn; } __END__ =head1 NAME cm-reparent.pl - fix mail threading =head1 SYNOPSIS cm-reparent.pl ~/Mail/inbox/23 ~/Mail/inbox/45 ... =head1 DESCRIPTION This script should be called from within Claws-Mail as an action Define an action as Menu name: Reparent (fix threading) Command: cm-reparent.pl %F Then select from the message list all files that should be re-parented Then invoke the action All but the oldest of those mails will be modified (if needed) to reflect that the oldest mail is the parent of all other mails by adding or altering the header lines C<In-Reply-To:> and C<References:> Given 4 files A, B, C, and D like File Message-Id Date A 123AC_12 2016-06-01 12:13:14 B aFFde2993 2016-06-01 13:14:15 C 0000_1234 2016-06-02 10:18:04 D foo_bar_12 2016-06-03 04:00:00 The new tree will be like A 123AC_12 2016-06-01 12:13:14 +- B aFFde2993 2016-06-01 13:14:15 +- C 0000_1234 2016-06-02 10:18:04 +- D foo_bar_12 2016-06-03 04:00:00 and not like A 123AC_12 2016-06-01 12:13:14 +- B aFFde2993 2016-06-01 13:14:15 +- C 0000_1234 2016-06-02 10:18:04 +- D foo_bar_12 2016-06-03 04:00:00 Existing entries of C<References:> and C<In-Reply-To:> in the header of any of B, C, or D will be preserved as C<X-References:> or C<X-In-Reply-To:> respectively. =head1 SEE ALSO L<Date::Parse>, L<Claws Mail|http://www.claws-mail.org> cm-break.pl =head1 AUTHOR H.Merijn Brand <h.m.brand@xs4all.nl> =head1 COPYRIGHT AND LICENSE Copyright (C) 2016-2018 H.Merijn Brand. All rights reserved. This library is free software; you can redistribute and/or modify it under the same terms as Perl itself. See the L<Artistic license|http://dev.perl.org/licenses/artistic.html>. =cut