From 9fc4030d9b55674b73c341c815292055fcb6f05c Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <steinar+remoteglot@gunderson.no>
Date: Fri, 16 Jul 2021 16:34:24 +0200
Subject: [PATCH] Send information about lower depths to the JSON.

---
 remoteglot.pl | 37 ++++++++++++++++++++++++++++++-------
 1 file changed, 30 insertions(+), 7 deletions(-)

diff --git a/remoteglot.pl b/remoteglot.pl
index b9055a6..56554a6 100755
--- a/remoteglot.pl
+++ b/remoteglot.pl
@@ -480,6 +480,8 @@ sub parse_infos {
 		}
 	}
 
+	my $prev_depth = $info->{'depth1'} // $info->{'depth'};
+
 	while (scalar @x > 0) {
 		if ($x[0] eq 'multipv') {
 			# Dealt with above
@@ -534,6 +536,14 @@ sub parse_infos {
 		die "Unknown info '" . join(',', @x) . "'";
 
 	}
+
+	my $now_depth = $info->{'depth1'} // $info->{'depth'};
+	if (defined($prev_depth) && POSIX::floor($now_depth / 10) > POSIX::floor($prev_depth / 10)) {
+		my $d = POSIX::floor($now_depth / 10) * 10;  # In case we skipped some.
+		my $cp = $info->{'score_cp1'} // $info->{'score_cp'};
+		my $mate = $info->{'score_mate1'} // $info->{'score_mate'};
+		push @{$info->{'lowdepth'}}, [ $d, $cp, $mate ];
+	}
 }
 
 sub parse_ids {
@@ -944,6 +954,13 @@ sub output_json {
 	$json->{'tablebase'} = $info->{'tablebase'};
 	$json->{'pv'} = [ prettyprint_pv($pos_calculating, @{$info->{'pv'}}) ];
 
+	$json->{'lowdepth'} = {};
+	if (exists($info->{'lowdepth'})) {
+		for my $ld (@{$info->{'lowdepth'}}) {
+			$json->{'lowdepth'}{$ld->[0]} = score_digest_inner($ld->[1], $ld->[2], undef, 0, $pos_calculating);
+		}
+	}
+
 	my %refutation_lines = ();
 	my @refutation_lines = ();
 	if (defined($engine2)) {
@@ -1172,14 +1189,21 @@ sub short_score {
 # (with side-to-play information) score_sort_key.
 sub score_digest {
 	my ($info, $pos, $mpv) = @_;
+	return score_digest_inner(
+		$info->{'score_cp' . $mpv},
+		$info->{'score_mate' . $mpv},
+		$info->{'splicepos' . $mpv},
+		$info->{'tablebase'},
+		$pos);
+}
 
-	if (defined($info->{'score_mate' . $mpv})) {
-		my $mate = $info->{'score_mate' . $mpv};
+sub score_digest_inner {
+	my ($score, $mate, $sp, $tablebase, $pos) = @_;
+	if (defined($mate)) {
 		if ($pos->{'toplay'} eq 'B') {
 			$mate = -$mate;
 		}
-		if (exists($info->{'splicepos' . $mpv})) {
-			my $sp = $info->{'splicepos' . $mpv};
+		if (defined($sp)) {
 			if ($mate > 0) {
 				return ['T', $sp];
 			} else {
@@ -1197,12 +1221,11 @@ sub score_digest {
 			}
 		}
 	} else {
-		if (exists($info->{'score_cp' . $mpv})) {
-			my $score = $info->{'score_cp' . $mpv};
+		if (defined($score)) {
 			if ($pos->{'toplay'} eq 'B') {
 				$score = -$score;
 			}
-			if ($score == 0 && $info->{'tablebase'}) {
+			if ($score == 0 && $tablebase) {
 				return ['d', undef];
 			} else {
 				return ['cp', int($score)];
-- 
2.39.2