use JSON::XS;
use lib '..';
use Position;
+use IPC::Open2;
+use Chess::PGN::Parse;
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, "-|", "../binlookup", "../open.mtbl", $hex
- or die "../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 @json_moves = ();
+push @json_moves, {
+ white => $white * 1,
+ draw => $draw * 1,
+ black => $black * 1,
+ white_avg_elo => $white_avg_elo * 1,
+ black_avg_elo => $black_avg_elo * 1,
+ num_elo => $num_elo * 1
+};
+
+my $opening = $openings{$opening_num} // 'A00: Start position';
+
+my $root_game;
+eval {
+ die "Missing PGN position data." if (!defined($pgn_file_number) || !defined($pgn_start_position));
+ my $pgntext = read_root_pgn($pgn_file_number, $pgn_start_position);
+ my $pgn = Chess::PGN::Parse->new(undef, $pgntext);
+ $pgn->read_game() or die;
+ $pgn->parse_game() or die;
-my $opening;
+ my $tags = $pgn->tags;
+ $root_game = {};
+ $root_game->{'white'} = $pgn->white;
+ $root_game->{'white_elo'} = $tags->{'WhiteElo'};
+ $root_game->{'black'} = $pgn->black;
+ $root_game->{'black_elo'} = $tags->{'BlackElo'};
+ $root_game->{'event'} = $pgn->event;
+ $root_game->{'date'} = $pgn->date;
+ $root_game->{'result'} = $pgn->result;
+ $root_game->{'eco'} = $pgn->eco;
+ $root_game->{'moves'} = scalar @{$pgn->moves};
+};
-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.
+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,
black_avg_elo => $black_avg_elo * 1,
num_elo => $num_elo * 1
};
- $opening = $openings{$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'};
-}
+print JSON::XS::encode_json({ moves => \@json_moves, opening => $opening, root_game => $root_game });
sub read_openings {
open my $fh, "../openings.txt"
}
close $fh;
}
+
+sub read_root_pgn {
+ my @pgnnames;
+ open my $pgnnamesfh, "<", "../pgnnames.txt"
+ or die "../pgnnames.txt: $!";
+ while (<$pgnnamesfh>) {
+ chomp;
+ push @pgnnames, $_;
+ }
+ 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;
+}