use JSON::XS;
use lib '..';
use Position;
-use ECO;
+use IPC::Open2;
+use Chess::PGN::Parse;
-ECO::unpersist("../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 $includetransp = $cgi->param('includetransp') // 1;
+
my $pos = Position->from_fen($fen);
-my $hex = unpack('H*', $pos->bitpacked_fen);
-open my $fh, "-|", "../binlookup", "../open.mtbl", $hex
- or die "../binlookup: $!";
-
-my $opening;
-
-my @moves = ();
-while (<$fh>) {
- chomp;
- my ($move, $white, $draw, $black, $opening_num, $white_avg_elo, $black_avg_elo, $num_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,
- num_elo => $num_elo * 1
- };
- $opening = $ECO::openings[$opening_num];
-}
-close $fh;
+my ($json_root_pos, $root_aux_data) = get_json_move($pos, undef, $chld_in, $chld_out); # TODO: include previous hash if $includetransp == 0
+my $opening = $openings{$json_root_pos->{'opening_num'}} // 'A00: Start position';
+
+my @json_moves = ($json_root_pos);
-@moves = sort { num($b) <=> num($a) } @moves;
+my $root_game;
+eval {
+ if (!exists($root_aux_data->{'pgn_file_number'}) ||
+ !exists($root_aux_data->{'pgn_start_position'})) {
+ die "Missing PGN position data."
+ }
+ my $pgntext = read_root_pgn($root_aux_data->{'pgn_file_number'}, $root_aux_data->{'pgn_start_position'});
+ my $pgn = Chess::PGN::Parse->new(undef, $pgntext);
+ $pgn->read_game() or die;
+ $pgn->parse_game() or die;
+
+ 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;
+ $root_game->{'moves'} = int(((scalar @{$pgn->moves}) + 1) / 2);
+};
+
+# Explore one move out.
+for my $move (@{$root_aux_data->{'moves'}}) {
+ my ($np, $uci_move) = $pos->make_pretty_move($move);
+ my $json_pos;
+ if ($includetransp) {
+ ($json_pos, undef) = get_json_move($np, undef, $chld_in, $chld_out);
+ } else {
+ ($json_pos, undef) = get_json_move($np, $root_aux_data->{'pos_hash'}, $chld_in, $chld_out);
+ }
+ $json_pos->{'move'} = $move;
+ push @json_moves, $json_pos;
+}
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_game => $root_game });
+
+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 num {
- my $x = shift;
- return $x->{'white'} + $x->{'draw'} + $x->{'black'};
+sub read_root_pgn {
+ my ($pgn_file_number, $pgn_start_position) = @_;
+ 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 $root_pgn;
+}
+
+sub get_json_move {
+ my ($pos, $filter_prev_pos_hash, $chld_in, $chld_out) = @_;
+ my $hex = unpack('H*', $pos->bitpacked_fen);
+ if (defined($filter_prev_pos_hash)) {
+ $hex .= unpack('H*', pack('S', $filter_prev_pos_hash));
+ }
+ print $chld_in $hex, "\n";
+
+ # Read the hash of this position.
+ chomp (my $pos_hash = <$chld_out>);
+
+ chomp (my $line = <$chld_out>);
+ if ($line eq '-') {
+ return ({}, {});
+ }
+
+ my ($white, $draw, $black, $opening_num, $white_sum_elo, $black_sum_elo, $num_elo, $timestamp, $pgn_file_number, $pgn_start_position, @moves) = split / /, $line;
+ my $json_pos = {
+ white => $white,
+ draw => $draw,
+ black => $black,
+ white_avg_elo => $num_elo == 0 ? undef : $white_sum_elo / $num_elo,
+ black_avg_elo => $num_elo == 0 ? undef : $black_sum_elo / $num_elo,
+ num_elo => $num_elo,
+ opening_num => $opening_num,
+ };
+ my $aux_data = { # Only relevant for the root.
+ pos_hash => $pos_hash * 1,
+ moves => \@moves,
+ pgn_file_number => $pgn_file_number,
+ pgn_start_position => $pgn_start_position,
+ };
+ return ($json_pos, $aux_data);
}
projects / remoteglot-book / blobdiff