search: try to fill in ghosts when generating thread skeleton

Since we attempt to fill in threads by Subject, our thread
skeletons can cross actual thread IDs, leading to the
possibility of false ghosts showing up in the skeleton.
Try to fill in the ghosts as well as possible by performing
a message lookup.

1 files changed, 16 insertions, 0 deletions

diff --git a/lib/PublicInbox/SearchMsg.pm b/lib/PublicInbox/SearchMsg.pm
index a19d45db..84e2ad51 100644
--- a/lib/PublicInbox/SearchMsg.pm
+++ b/lib/PublicInbox/SearchMsg.pm
@@ -29,6 +29,22 @@ sub get_val ($$) {
         Search::Xapian::sortable_unserialise($doc->get_value($col));
 }
 
+sub load_expand {
+        my ($self) = @_;
+        my $doc = $self->{doc};
+        my $data = $doc->get_data or return;
+        $self->{ts} = get_val($doc, &PublicInbox::Search::TS);
+        utf8::decode($data);
+        my ($subj, $from, $refs, $to, $cc, $blob) = split(/\n/, $data);
+        $self->{subject} = $subj;
+        $self->{from} = $from;
+        $self->{references} = $refs;
+        $self->{to} = $to;
+        $self->{cc} = $cc;
+        $self->{blob} = $blob;
+        $self;
+}
+
 sub load_doc {
         my ($class, $doc) = @_;
         my $data = $doc->get_data or return;