X-Git-Url: https://git.sesse.net/?p=remoteglot-book;a=blobdiff_plain;f=www%2Fopening-stats.pl;h=28dd4436f69219e09d63d02451cc5f17073cde51;hp=d74f1add083bddcc89ec6551b4091df760f0e16e;hb=f95dfda2d14615a9816ba1abb32bd240a470e228;hpb=e6cab1e6d437e7ca15b32795c14a49baf08df5dc

diff --git a/www/opening-stats.pl b/www/opening-stats.pl
index d74f1ad..28dd443 100755
--- a/www/opening-stats.pl
+++ b/www/opening-stats.pl
@@ -5,46 +5,66 @@ use CGI;
 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 $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 = $openings{$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';
 
-@moves = sort { num($b) <=> num($a) } @moves;
+my @json_moves = ($json_root_pos);
 
-print $cgi->header(-type=>'application/json');
-print JSON::XS::encode_json({ moves => \@moves, opening => $opening });
+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);
+};
 
-sub num {
-	my $x = shift;
-	return $x->{'white'} + $x->{'draw'} + $x->{'black'};
+# 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 => \@json_moves, opening => $opening, root_game => $root_game });
+
 sub read_openings {
 	open my $fh, "../openings.txt"
 		or die "../openings.txt: $!";
@@ -59,3 +79,67 @@ sub read_openings {
 	}
 	close $fh;
 }
+
+sub read_root_pgn {
+	my ($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);
+}