search: allow searching user fields (To/Cc/From)

Sometimes it can be useful to search based on who the
message was sent to, sent by, or Cc:-ed.  Of course,
headers can be faked, but they usually are not...

Anyways this mostly matches the behavior of mairix(1).

1 files changed, 42 insertions, 17 deletions

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index f54f5f2f..37fefbea 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -96,12 +96,51 @@ sub _lock_release {
         close $lockfh or die "close failed: $!\n";
 }
 
-sub add_val {
+sub add_val ($$$) {
         my ($doc, $col, $num) = @_;
         $num = Search::Xapian::sortable_serialise($num);
         $doc->add_value($col, $num);
 }
 
+sub add_values ($$$) {
+        my ($smsg, $bytes, $num) = @_;
+
+        my $ts = $smsg->ts;
+        my $doc = $smsg->{doc};
+        add_val($doc, &PublicInbox::Search::TS, $ts);
+
+        defined($num) and add_val($doc, &PublicInbox::Search::NUM, $num);
+
+        defined($bytes) and add_val($doc, &PublicInbox::Search::BYTES, $bytes);
+
+        add_val($doc, &PublicInbox::Search::LINES,
+                        $smsg->{mime}->body_raw =~ tr!\n!\n!);
+
+        my $yyyymmdd = strftime('%Y%m%d', gmtime($ts));
+        $doc->add_value(&PublicInbox::Search::YYYYMMDD, $yyyymmdd);
+}
+
+sub index_users ($$) {
+        my ($tg, $smsg) = @_;
+
+        my $from = $smsg->from;
+        my $to = $smsg->to;
+        my $cc = $smsg->cc;
+
+        $tg->index_text($from, 1, 'A'); # A - author
+        $tg->increase_termpos;
+
+        $tg->index_text($to, 1, 'XTO') if $to ne '';
+        $tg->index_text($cc, 1, 'XCC') if $cc ne '';
+        my $tc = join("\t", $to, $cc);
+        $tg->index_text($tc, 1, 'XTC') if $tc ne '';
+        my $tcf = join("\t", $tc, $from);
+        $tg->index_text($tcf, 1, 'XTCF') if $tcf ne '';
+
+        $tg->index_text($from);
+        $tg->increase_termpos;
+}
+
 sub add_message {
         my ($self, $mime, $bytes, $num, $blob) = @_; # mime = Email::MIME object
         my $db = $self->{xdb};
@@ -129,20 +168,7 @@ sub add_message {
                         $doc->add_term(xpfx('path') . id_compress($path));
                 }
 
-                my $ts = $smsg->ts;
-                add_val($doc, &PublicInbox::Search::TS, $ts);
-
-                defined($num) and
-                        add_val($doc, &PublicInbox::Search::NUM, $num);
-
-                defined($bytes) and
-                        add_val($doc, &PublicInbox::Search::BYTES, $bytes);
-
-                add_val($doc, &PublicInbox::Search::LINES,
-                                $mime->body_raw =~ tr!\n!\n!);
-
-                my $yyyymmdd = strftime('%Y%m%d', gmtime($ts));
-                $doc->add_value(&PublicInbox::Search::YYYYMMDD, $yyyymmdd);
+                add_values($smsg, $bytes, $num);
 
                 my $tg = $self->term_generator;
 
@@ -152,8 +178,7 @@ sub add_message {
                 $tg->index_text($subj) if $subj;
                 $tg->increase_termpos;
 
-                $tg->index_text($smsg->from);
-                $tg->increase_termpos;
+                index_users($tg, $smsg);
 
                 msg_iter($mime, sub {
                         my ($part, $depth, @idx) = @{$_[0]};