X-Git-Url: https://git.sesse.net/?p=remoteglot-book;a=blobdiff_plain;f=www%2Fopening-stats.pl;h=c283248395aab0cf62496b2b6b66c0e99f26b6ce;hp=33d3c082dcd551a657a7c5847360c47d0a26046c;hb=4fa00c4fbfb86465b2d50bb0b5642f00c6b9329b;hpb=2a322a4ad576d87535ce8a479f7a516da9457e80

diff --git a/www/opening-stats.pl b/www/opening-stats.pl
index 33d3c08..c283248 100755
--- a/www/opening-stats.pl
+++ b/www/opening-stats.pl
@@ -5,24 +5,65 @@ 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 $pos = Position->from_fen($fen);
 my $hex = unpack('H*', $pos->bitpacked_fen);
-open my $fh, "-|", "../binlookup", "../open.mtbl", "40", $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 => $draw * 1,
@@ -31,19 +72,10 @@ while (<$fh>) {
 		black_avg_elo => $black_avg_elo * 1,
 		num_elo => $num_elo * 1
 	};
-	$opening = $openings{$opening_num} // 'A00: Start position';
 }
-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"
@@ -59,3 +91,31 @@ sub read_openings {
 	}
 	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;
+}