# Copyright (C) all contributors
# License: AGPL-3.0+
# Filter for lists.ruby-lang.org trailers
package PublicInbox::Filter::RubyLang;
use v5.10.1;
use parent qw(PublicInbox::Filter::Base);
use PublicInbox::MID qw(mids);
my $l1 = qr/Unsubscribe:\s
/x;
my $l2 = qr{};
sub new {
my ($class, %opts) = @_;
my $altid = delete $opts{-altid};
my $self = $class->SUPER::new(%opts);
my $ibx = $self->{ibx};
# altid = serial:ruby-core:file=msgmap.sqlite3
if (!$altid && $ibx && $ibx->{altid}) {
$altid ||= $ibx->{altid}->[0];
}
if ($altid) {
require PublicInbox::AltId;
$self->{-altid} = PublicInbox::AltId->new($ibx, $altid, 1);
}
$self;
}
sub scrub_part ($) {
my ($part) = @_;
my $ct = $part->content_type;
if (!$ct || $ct =~ m{\btext/plain\b}i) {
my $s = eval { $part->body_str };
if (defined $s && $s =~ s/\n?$l1\n$l2\n\z//os) {
$part->body_str_set($s);
return 1;
}
}
0;
}
sub scrub {
my ($self, $mime, $for_remove) = @_;
# no msg_iter here, msg_iter is only for read-only access
if (my @sub = $mime->subparts) {
my $changed = 0;
$changed |= scrub_part($_) for @sub;
$mime->parts_set(\@sub) if $changed;
} else {
scrub_part($mime);
}
my $altid = $self->{-altid};
if ($altid && !$for_remove) {
my $hdr = $mime->header_obj;
my $mids = mids($hdr);
return $self->REJECT('Message-ID missing') unless (@$mids);
my $n;
my @v = $hdr->header_raw('X-Mail-Count'); # old host only
if (@v) {
for (@v) {
/\A\s*([0-9]+)\s*\z/ or next;
$n = $1;
last;
}
} else { # new host: nue.mailmanlists.eu
for ($hdr->header_str('Subject')) {
/\A\[ruby-[^:]+:([0-9]+)\]/ or next;
$n = $1;
last;
}
}
$n // return $self->REJECT('could not get count not numeric');
foreach my $mid (@$mids) {
my $r = $altid->mm_alt->mid_set($n, $mid);
next if $r == 0;
last;
}
}
$self->ACCEPT($mime);
}
sub delivery {
my ($self, $mime) = @_;
$self->scrub($mime);
}
1;