[PATCH 2/6] searchidx: split off index_xapian for msg_iter

[Eric Wong <e@80x24.org>]

This ought to save some memory, but it's probably lost in the
noise given the cost of indexing.  Regardless it still reduces
the indentation level and makes future changes easier to read.
---
 lib/PublicInbox/SearchIdx.pm | 54 +++++++++++++++++++-----------------
 1 file changed, 28 insertions(+), 26 deletions(-)

diff --git a/lib/PublicInbox/SearchIdx.pm b/lib/PublicInbox/SearchIdx.pm
index 4cfbc4aa..5065974c 100644
--- a/lib/PublicInbox/SearchIdx.pm
+++ b/lib/PublicInbox/SearchIdx.pm
@@ -285,6 +285,33 @@ sub index_body ($$$) {
 	@$lines = ();
 }
 
+sub index_xapian { # msg_iter callback
+	my ($part, $depth, @idx) = @{$_[0]};
+	my ($self, $doc) = @{$_[1]};
+	my $ct = $part->content_type || 'text/plain';
+	my $fn = $part->filename;
+	if (defined $fn && $fn ne '') {
+		$self->index_text($fn, 1, 'XFN');
+	}
+
+	my ($s, undef) = msg_part_text($part, $ct);
+	defined $s or return;
+
+	my (@orig, @quot);
+	my @lines = split(/\n/, $s);
+	while (defined(my $l = shift @lines)) {
+		if ($l =~ /^>/) {
+			$self->index_body(\@orig, $doc) if @orig;
+			push @quot, $l;
+		} else {
+			$self->index_body(\@quot, 0) if @quot;
+			push @orig, $l;
+		}
+	}
+	$self->index_body(\@quot, 0) if @quot;
+	$self->index_body(\@orig, $doc) if @orig;
+}
+
 sub add_xapian ($$$$$) {
 	my ($self, $mime, $num, $oid, $mids, $mid0) = @_;
 	my $smsg = PublicInbox::SearchMsg->new($mime);
@@ -303,32 +330,7 @@ sub add_xapian ($$$$$) {
 	$self->index_text($subj, 1, 'S') if $subj;
 	$self->index_users($smsg);
 
-	msg_iter($mime, sub {
-		my ($part, $depth, @idx) = @{$_[0]};
-		my $ct = $part->content_type || 'text/plain';
-		my $fn = $part->filename;
-		if (defined $fn && $fn ne '') {
-			$self->index_text($fn, 1, 'XFN');
-		}
-
-		my ($s, undef) = msg_part_text($part, $ct);
-		defined $s or return;
-
-		my (@orig, @quot);
-		my @lines = split(/\n/, $s);
-		while (defined(my $l = shift @lines)) {
-			if ($l =~ /^>/) {
-				$self->index_body(\@orig, $doc) if @orig;
-				push @quot, $l;
-			} else {
-				$self->index_body(\@quot, 0) if @quot;
-				push @orig, $l;
-			}
-		}
-		$self->index_body(\@quot, 0) if @quot;
-		$self->index_body(\@orig, $doc) if @orig;
-	});
-
+	msg_iter($mime, \&index_xapian, [ $self, $doc ]);
 	foreach my $mid (@$mids) {
 		$self->index_text($mid, 1, 'XM');