Put last move in <title>. Idea from Stephan Brumme.

[remoteglot] / remoteglot.pl

diff --git a/remoteglot.pl b/remoteglot.pl
index d82c20bed25034896c341b979aa9a5b36bb0fac9..e3433aa12414037ff86ba81c5d92e0449514d253 100755 (executable)
--- a/remoteglot.pl
+++ b/remoteglot.pl
@@ -742,11 +742,61 @@ sub output_json {
        }
        $json->{'refutation_lines'} = \%refutation_lines;
 
-       open my $fh, ">", $remoteglotconf::json_output . ".tmp"
+       my $encoded = JSON::XS::encode_json($json);
+       atomic_set_contents($remoteglotconf::json_output, $encoded);
+
+       if (exists($pos_calculating->{'history'}) &&
+           defined($remoteglotconf::json_history_dir)) {
+               my $halfmove_num = scalar @{$pos_calculating->{'history'}};
+               (my $fen = $pos_calculating->fen()) =~ tr,/ ,-_,;
+               my $filename = $remoteglotconf::json_history_dir . "/move$halfmove_num-$fen.json";
+
+               # Overwrite old analysis (assuming it exists at all) if we're
+               # using a different engine, or if we've calculated deeper.
+               # nodes is used as a tiebreaker. Don't bother about Multi-PV
+               # data; it's not that important.
+               my ($old_engine, $old_depth, $old_nodes) = get_json_analysis_stats($filename);
+               my $new_depth = $json->{'depth'} // 0;
+               my $new_nodes = $json->{'nodes'} // 0;
+               if (!defined($old_engine) ||
+                   $old_engine ne $json->{'id'}{'name'} ||
+                   $new_depth > $old_depth ||
+                   ($new_depth == $old_depth && $new_nodes >= $old_nodes)) {
+                       atomic_set_contents($filename, $encoded);
+               }
+       }
+}
+
+sub atomic_set_contents {
+       my ($filename, $contents) = @_;
+
+       open my $fh, ">", $filename . ".tmp"
                or return;
-       print $fh JSON::XS::encode_json($json);
+       print $fh $contents;
+       close $fh;
+       rename($filename . ".tmp", $filename);
+}
+
+sub get_json_analysis_stats {
+       my $filename = shift;
+
+       my ($engine, $depth, $nodes);
+
+       open my $fh, "<", $filename
+               or return undef;
+       local $/ = undef;
+       eval {
+               my $json = JSON::XS::decode_json(<$fh>);
+               $engine = $json->{'id'}{'name'} // die;
+               $depth = $json->{'depth'} // 0;
+               $nodes = $json->{'nodes'} // 0;
+       };
        close $fh;
-       rename($remoteglotconf::json_output . ".tmp", $remoteglotconf::json_output);
+       if ($@) {
+               warn "Error in decoding $filename: $@";
+               return undef;
+       }
+       return ($engine, $depth, $nodes);
 }
 
 sub uciprint {