Add some opening book stuff that is still under development, and really should be...

[remoteglot] / www / opening-stats.pl

diff --git a/www/opening-stats.pl b/www/opening-stats.pl
new file mode 100755 (executable)
index 0000000..3b2b2ff
--- /dev/null
+++ b/www/opening-stats.pl
@@ -0,0 +1,45 @@
+#! /usr/bin/perl
+use strict;
+use warnings;
+use CGI;
+use JSON::XS;
+use lib '..';
+use Position;
+use ECO;
+
+ECO::unpersist("../book/openings.txt");
+
+my $cgi = CGI->new;
+my $fen = $cgi->param('fen');
+my $pos = Position->from_fen($fen);
+my $hex = unpack('H*', $pos->bitpacked_fen);
+open my $fh, "-|", "../book/binlookup", "../book/open.mtbl", $hex
+       or die "../book/binlookup: $!";
+
+my $opening;
+
+my @moves = ();
+while (<$fh>) {
+       chomp;
+       my ($move, $white, $draw, $black, $opening_num, $white_avg_elo, $black_avg_elo) = split;
+       push @moves, {
+               move => $move,
+               white => $white * 1,
+               draw => $draw * 1,
+               black => $black * 1,
+               white_avg_elo => $white_avg_elo * 1,
+               black_avg_elo => $black_avg_elo * 1
+       };
+       $opening = $ECO::openings[$opening_num];
+}
+close $fh;
+
+@moves = sort { num($b) <=> num($a) } @moves;
+
+print $cgi->header(-type=>'application/json');
+print JSON::XS::encode_json({ moves => \@moves, opening => $opening });
+
+sub num {
+       my $x = shift;
+       return $x->{'white'} + $x->{'draw'} + $x->{'black'};
+}