Load and display the root PGN.

[remoteglot-book] / www / opening-stats.pl

diff --git a/www/opening-stats.pl b/www/opening-stats.pl
index 47bae771d4b3eb8b37ce46e9f242ff50e8765c40..9a2ccbc4ad32380598abc2d9a17d6a46e2a4fa59 100755 (executable)
--- a/www/opening-stats.pl
+++ b/www/opening-stats.pl
@@ -5,24 +5,42 @@ use CGI;
 use JSON::XS;
 use lib '..';
 use Position;
-use ECO;
+use IPC::Open2;
 
-ECO::unpersist("../book/openings.txt");
+our %openings = ();
+read_openings();
 
 my $cgi = CGI->new;
-my $fen = $cgi->param('fen');
+my ($chld_out, $chld_in);
+my $pid = IPC::Open2::open2($chld_out, $chld_in, "../binlookup", "../open.mtbl", "40");
+
+# Root position. Basically ignore everything except the opening (and later some root game stuff).
+my $fen = $cgi->param('fen') // 'rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1';
 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: $!";
+print $chld_in $hex, "\n";
+chomp (my $line = <$chld_out>);
+
+my ($white, $draw, $black, $opening_num, $white_avg_elo, $black_avg_elo, $num_elo, $timestamp, $pgn_file_number, $pgn_start_position, @moves) = split / /, $line;
+my $opening = $openings{$opening_num} // 'A00: Start position';
 
-my $opening;
+my $root_pgn;
+eval {
+       $root_pgn = read_root_pgn($pgn_file_number, $pgn_start_position);
+};
+if ($@) {
+       $root_pgn = "Could not find root PGN. ($@)";
+}
 
-my @moves = ();
-while (<$fh>) {
-       chomp;
-       my ($move, $white, $draw, $black, $opening_num, $white_avg_elo, $black_avg_elo, $num_elo) = split;
-       push @moves, {
+# Explore one move out.
+my @json_moves = ();
+for my $move (@moves) {
+       my ($np, $uci_move) = $pos->make_pretty_move($move);
+       my $hex = unpack('H*', $np->bitpacked_fen);
+       print $chld_in $hex, "\n";
+       my $line = <$chld_out>;
+       my ($white, $draw, $black, $opening_num, $white_avg_elo, $black_avg_elo, $num_elo) = split / /, $line;
+       push @json_moves, {
                move => $move,
                white => $white * 1,
                draw => $draw * 1,
@@ -31,16 +49,56 @@ while (<$fh>) {
                black_avg_elo => $black_avg_elo * 1,
                num_elo => $num_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 });
+print JSON::XS::encode_json({ moves => \@json_moves, opening => $opening, root_pgn => $root_pgn });
 
 sub num {
        my $x = shift;
        return $x->{'white'} + $x->{'draw'} + $x->{'black'};
 }
+
+sub read_openings {
+       open my $fh, "../openings.txt"
+               or die "../openings.txt: $!";
+       for my $line (<$fh>) {
+               chomp $line;
+               my ($hash, $eco, $opening, $variation, $subvariation) = split /\t/, $line;
+               if ($variation eq '') {
+                       $openings{$hash} = $eco . ": " . $opening;
+               } else {
+                       $openings{$hash} = $eco . ": " . $opening . ": " . $variation;
+               }
+       }
+       close $fh;
+}
+
+sub read_root_pgn {
+       my @pgnnames;
+       open my $pgnnamesfh, "<", "../pgnnames.txt"
+               or die "../pgnnames.txt: $!";
+       while (<$pgnnamesfh>) {
+               chomp;
+               push @pgnnames, $_;
+               warn "PGN name: $_";
+       }
+       close $pgnnamesfh;
+
+       if ($pgn_file_number > $#pgnnames) {
+               die "Unknown PGN file number $pgn_file_number";
+       }
+
+       my $root_pgn;
+       open my $pgnfh, "<", "../" . $pgnnames[$pgn_file_number]
+               or die $pgnnames[$pgn_file_number] . ": $!";
+       sysseek($pgnfh, $pgn_start_position, 0)
+               or die "Could not seek to $pgn_start_position: $!";
+       sysread($pgnfh, $root_pgn, 32768)
+               or die "Could not read PGN from $pgn_start_position at $pgnnames[$pgn_file_number]: $!";
+       close $pgnfh;
+       $root_pgn =~ s/^.*?(\[Event )/$1/s;
+       $root_pgn =~ s/^(.+?)\[Event .*/$1/s;
+
+       return $root_pgn;
+}