add filter for RubyLang lists

[public-inbox.git] / lib / PublicInbox / Filter / RubyLang.pm

diff --git a/lib/PublicInbox/Filter/RubyLang.pm b/lib/PublicInbox/Filter/RubyLang.pm
new file mode 100644 (file)
index 0000000..ec4bc32
--- /dev/null
+++ b/lib/PublicInbox/Filter/RubyLang.pm
@@ -0,0 +1,63 @@
+# Copyright (C) 2017 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# Filter for lists.ruby-lang.org trailers
+package PublicInbox::Filter::RubyLang;
+use base qw(PublicInbox::Filter::Base);
+use strict;
+use warnings;
+
+my $l1 = qr/Unsubscribe:\s
+       <mailto:ruby-\w+-request\@ruby-lang\.org\?subject=unsubscribe>/x;
+my $l2 = qr{<http://lists\.ruby-lang\.org/cgi-bin/mailman/options/ruby-\w+>};
+
+sub new {
+       my ($class, %opts) = @_;
+       my $altid = delete $opts{-altid};
+       my $self = $class->SUPER::new(%opts);
+       # altid = serial:ruby-core:file=msgmap.sqlite3
+       if ($altid) {
+               require PublicInbox::MID; # mid_clean
+               my $ibx = $self->{-inbox};
+               require PublicInbox::AltId;
+               $self->{-altid} = PublicInbox::AltId->new($ibx, $altid, 1);
+       }
+       $self;
+}
+
+sub scrub {
+       my ($self, $mime) = @_;
+       # no msg_iter here, that is only for read-only access
+       $mime->walk_parts(sub {
+               my ($part) = $_[0];
+               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);
+                       }
+               }
+       });
+       my $altid = $self->{-altid};
+       if ($altid) {
+               my $hdr = $mime->header_obj;
+               my $mid = $hdr->header_raw('Message-ID');
+               unless (defined $mid) {
+                       return $self->REJECT('Message-Id missing');
+               }
+               my $n = $hdr->header_raw('X-Mail-Count');
+               if (!defined($n) || $n !~ /\A\s*\d+\s*\z/) {
+                       return $self->REJECT('X-Mail-Count not numeric');
+               }
+               $mid = PublicInbox::MID::mid_clean($mid);
+               $altid->{mm_alt}->mid_set($n, $mid);
+       }
+       $self->ACCEPT($mime);
+}
+
+sub delivery {
+       my ($self, $mime) = @_;
+       $self->scrub($mime);
+}
+
+1;