From d42bb8077d6fe78a61458c990989667308ff1dd2 Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Tue, 27 Oct 2020 07:54:09 +0000
Subject: searchidx: introduce "xref3" concept

This will be used to track cross-posted messages in the
external/detached index.
---
 lib/PublicInbox/Smsg.pm | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'lib/PublicInbox/Smsg.pm')

diff --git a/lib/PublicInbox/Smsg.pm b/lib/PublicInbox/Smsg.pm
index 14086538..c0fd85fd 100644
--- a/lib/PublicInbox/Smsg.pm
+++ b/lib/PublicInbox/Smsg.pm
@@ -137,4 +137,17 @@ sub subject_normalized ($) {
 	$subj;
 }
 
+sub xref3 {
+	my ($self, $doc) = @_;
+	my $end = $doc->termlist_end;
+	my $it = $doc->termlist_begin;
+	$it->skip_to('P');
+	my @ret;
+	for (; $it != $end; $it++) {
+		my $val = $it->get_termname;
+		$val =~ s/\AP// and push @ret, $val;
+	}
+	\@ret;
+}
+
 1;
-- 
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