Support a ding sound per move. Off by default, of course.
[remoteglot] / remoteglot.pl
index 4ccdac7..39a0f4b 100755 (executable)
@@ -28,9 +28,10 @@ use warnings;
 no warnings qw(once);
 
 # Program starts here
-$SIG{ALRM} = sub { output(); };
 my $latest_update = undef;
+my $output_timer = undef;
 my $http_timer = undef;
+my $stop_pgn_fetch = 0;
 my $tb_retry_timer = undef;
 my %tb_cache = ();
 my $tb_lookup_running = 0;
@@ -93,8 +94,6 @@ $t->cmd("");
 $t->cmd("set shout 0");
 $t->cmd("set seek 0");
 $t->cmd("set style 12");
-$t->cmd("observe $remoteglotconf::target");
-print "FICS ready.\n";
 
 my $ev1 = AnyEvent->io(
        fh => fileno($t),
@@ -110,6 +109,15 @@ my $ev1 = AnyEvent->io(
                }
        }
 );
+if (defined($remoteglotconf::target)) {
+       if ($remoteglotconf::target =~ /^http:/) {
+               fetch_pgn($remoteglotconf::target);
+       } else {
+               $t->cmd("observe $remoteglotconf::target");
+       }
+}
+print "FICS ready.\n";
+
 # Engine events have already been set up by Engine.pm.
 EV::run;
 
@@ -153,10 +161,58 @@ sub handle_uci {
        output();
 }
 
+my $getting_movelist = 0;
+my $pos_for_movelist = undef;
+my @uci_movelist = ();
+my @pretty_movelist = ();
+
 sub handle_fics {
        my $line = shift;
        if ($line =~ /^<12> /) {
                handle_position(Position->new($line));
+               $t->cmd("moves");
+       }
+       if ($line =~ /^Movelist for game /) {
+               my $pos = $pos_waiting // $pos_calculating;
+               if (defined($pos)) {
+                       @uci_movelist = ();
+                       @pretty_movelist = ();
+                       $pos_for_movelist = Position->start_pos($pos->{'player_w'}, $pos->{'player_b'});
+                       $getting_movelist = 1;
+               }
+       }
+       if ($getting_movelist &&
+           $line =~ /^\s* \d+\. \s+                     # move number
+                       (\S+) \s+ \( [\d:.]+ \) \s*       # first move, then time
+                      (?: (\S+) \s+ \( [\d:.]+ \) )?    # second move, then time 
+                    /x) {
+               eval {
+                       my $uci_move;
+                       ($pos_for_movelist, $uci_move) = $pos_for_movelist->make_pretty_move($1);
+                       push @uci_movelist, $uci_move;
+                       push @pretty_movelist, $1;
+
+                       if (defined($2)) {
+                               ($pos_for_movelist, $uci_move) = $pos_for_movelist->make_pretty_move($2);
+                               push @uci_movelist, $uci_move;
+                               push @pretty_movelist, $2;
+                       }
+               };
+               if ($@) {
+                       warn "Error when getting FICS move history: $@";
+                       $getting_movelist = 0;
+               }
+       }
+       if ($getting_movelist &&
+           $line =~ /^\s+ \{.*\} \s+ (?: \* | 1\/2-1\/2 | 0-1 | 1-0 )/x) {
+               # End of movelist.
+               for my $pos ($pos_waiting, $pos_calculating) {
+                       next if (!defined($pos));
+                       if ($pos->fen() eq $pos_for_movelist->fen()) {
+                               $pos->{'pretty_history'} = \@pretty_movelist;
+                       }
+               }
+               $getting_movelist = 0;
        }
        if ($line =~ /^([A-Za-z]+)(?:\([A-Z]+\))* tells you: (.*)$/) {
                my ($who, $msg) = ($1, $2);
@@ -172,11 +228,10 @@ sub handle_fics {
                } elsif ($msg =~ /^pgn (.*?)$/) {
                        my $url = $1;
                        $t->cmd("tell $who Starting to poll '$url'.");
-                       AnyEvent::HTTP::http_get($url, sub {
-                               handle_pgn(@_, $url);
-                       });
+                       fetch_pgn($url);
                } elsif ($msg =~ /^stoppgn$/) {
                        $t->cmd("tell $who Stopping poll.");
+                       $stop_pgn_fetch = 1;
                        $http_timer = undef;
                } elsif ($msg =~ /^quit$/) {
                        $t->cmd("tell $who Bye bye.");
@@ -188,30 +243,71 @@ sub handle_fics {
        #print "FICS: [$line]\n";
 }
 
+# Starts periodic fetching of PGNs from the given URL.
+sub fetch_pgn {
+       my ($url) = @_;
+       AnyEvent::HTTP::http_get($url, sub {
+               handle_pgn(@_, $url);
+       });
+}
+
+my ($last_pgn_white, $last_pgn_black);
+my @last_pgn_uci_moves = ();
+my $pgn_hysteresis_counter = 0;
+
 sub handle_pgn {
        my ($body, $header, $url) = @_;
+
+       if ($stop_pgn_fetch) {
+               $stop_pgn_fetch = 0;
+               $http_timer = undef;
+               return;
+       }
+
        my $pgn = Chess::PGN::Parse->new(undef, $body);
        if (!defined($pgn) || !$pgn->read_game()) {
                warn "Error in parsing PGN from $url\n";
        } else {
-               $pgn->quick_parse_game;
-               my $pos = Position->start_pos($pgn->white, $pgn->black);
-               my $moves = $pgn->moves;
-               my @uci_moves = ();
-               for my $move (@$moves) {
-                       my ($from_row, $from_col, $to_row, $to_col, $promo) = $pos->parse_pretty_move($move);
-                       push @uci_moves, Board::move_to_uci_notation($from_row, $from_col, $to_row, $to_col, $promo);
-                       $pos = $pos->make_move($from_row, $from_col, $to_row, $to_col, $promo);
-               }
-               $pos->{'history'} = \@uci_moves;
-               $pos->{'pretty_history'} = $moves;
-               handle_position($pos);
+               eval {
+                       $pgn->quick_parse_game;
+                       my $pos = Position->start_pos($pgn->white, $pgn->black);
+                       my $moves = $pgn->moves;
+                       my @uci_moves = ();
+                       for my $move (@$moves) {
+                               my $uci_move;
+                               ($pos, $uci_move) = $pos->make_pretty_move($move);
+                               push @uci_moves, $uci_move;
+                       }
+                       $pos->{'pretty_history'} = $moves;
+
+                       # Sometimes, PGNs lose a move or two for a short while,
+                       # or people push out new ones non-atomically. 
+                       # Thus, if we PGN doesn't change names but becomes
+                       # shorter, we mistrust it for a few seconds.
+                       my $trust_pgn = 1;
+                       if (defined($last_pgn_white) && defined($last_pgn_black) &&
+                           $last_pgn_white eq $pgn->white &&
+                           $last_pgn_black eq $pgn->black &&
+                           scalar(@uci_moves) < scalar(@last_pgn_uci_moves)) {
+                               if (++$pgn_hysteresis_counter < 3) {
+                                       $trust_pgn = 0; 
+                               }
+                       }
+                       if ($trust_pgn) {
+                               $last_pgn_white = $pgn->white;
+                               $last_pgn_black = $pgn->black;
+                               @last_pgn_uci_moves = @uci_moves;
+                               $pgn_hysteresis_counter = 0;
+                               handle_position($pos);
+                       }
+               };
+               if ($@) {
+                       warn "Error in parsing moves from $url\n";
+               }
        }
        
        $http_timer = AnyEvent->timer(after => 1.0, cb => sub {
-               AnyEvent::HTTP::http_get($url, sub {
-                       handle_pgn(@_, $url);
-               });
+               fetch_pgn($url);
        });
 }
 
@@ -393,7 +489,8 @@ sub output {
        # Don't update too often.
        my $age = Time::HiRes::tv_interval($latest_update);
        if ($age < $remoteglotconf::update_max_interval) {
-               Time::HiRes::alarm($remoteglotconf::update_max_interval + 0.01 - $age);
+               my $wait = $remoteglotconf::update_max_interval + 0.01 - $age;
+               $output_timer = AnyEvent->timer(after => $wait, cb => \&output);
                return;
        }
        
@@ -417,7 +514,7 @@ sub output {
 
                my $t = $tb_cache{$fen};
                my $pv = $t->{'pv'};
-               my $matelen = int((1 + scalar @$pv) / 2);
+               my $matelen = int((1 + $t->{'score'}) / 2);
                if ($t->{'result'} eq '1/2-1/2') {
                        $info->{'score_cp'} = 0;
                } elsif ($t->{'result'} eq '1-0') {
@@ -612,8 +709,7 @@ sub output_json {
        $json->{'seldepth'} = $info->{'seldepth'};
        $json->{'tablebase'} = $info->{'tablebase'};
 
-       # single-PV only for now
-       $json->{'pv_uci'} = $info->{'pv'};
+       $json->{'pv_uci'} = $info->{'pv'};  # Still needs to be there for the JS to calculate arrows; only for the primary PV, though!
        $json->{'pv_pretty'} = [ prettyprint_pv($pos_calculating, @{$info->{'pv'}}) ];
 
        my %refutation_lines = ();
@@ -637,17 +733,66 @@ sub output_json {
                                        pretty_move => $pretty_move,
                                        pv_pretty => \@pretty_pv,
                                };
-                               $refutation_lines{$pv->[0]}->{'pv_uci'} = $pv;
                        };
                }
        }
        $json->{'refutation_lines'} = \%refutation_lines;
 
-       open my $fh, ">", $remoteglotconf::json_output . ".tmp"
+       my $encoded = JSON::XS::encode_json($json);
+       atomic_set_contents($remoteglotconf::json_output, $encoded);
+
+       if (exists($pos_calculating->{'pretty_history'}) &&
+           defined($remoteglotconf::json_history_dir)) {
+               my $halfmove_num = scalar @{$pos_calculating->{'pretty_history'}};
+               (my $fen = $pos_calculating->fen()) =~ tr,/ ,-_,;
+               my $filename = $remoteglotconf::json_history_dir . "/move$halfmove_num-$fen.json";
+
+               # Overwrite old analysis (assuming it exists at all) if we're
+               # using a different engine, or if we've calculated deeper.
+               # nodes is used as a tiebreaker. Don't bother about Multi-PV
+               # data; it's not that important.
+               my ($old_engine, $old_depth, $old_nodes) = get_json_analysis_stats($filename);
+               my $new_depth = $json->{'depth'} // 0;
+               my $new_nodes = $json->{'nodes'} // 0;
+               if (!defined($old_engine) ||
+                   $old_engine ne $json->{'id'}{'name'} ||
+                   $new_depth > $old_depth ||
+                   ($new_depth == $old_depth && $new_nodes >= $old_nodes)) {
+                       atomic_set_contents($filename, $encoded);
+               }
+       }
+}
+
+sub atomic_set_contents {
+       my ($filename, $contents) = @_;
+
+       open my $fh, ">", $filename . ".tmp"
                or return;
-       print $fh JSON::XS::encode_json($json);
+       print $fh $contents;
        close $fh;
-       rename($remoteglotconf::json_output . ".tmp", $remoteglotconf::json_output);
+       rename($filename . ".tmp", $filename);
+}
+
+sub get_json_analysis_stats {
+       my $filename = shift;
+
+       my ($engine, $depth, $nodes);
+
+       open my $fh, "<", $filename
+               or return undef;
+       local $/ = undef;
+       eval {
+               my $json = JSON::XS::decode_json(<$fh>);
+               $engine = $json->{'id'}{'name'} // die;
+               $depth = $json->{'depth'} // 0;
+               $nodes = $json->{'nodes'} // 0;
+       };
+       close $fh;
+       if ($@) {
+               warn "Error in decoding $filename: $@";
+               return undef;
+       }
+       return ($engine, $depth, $nodes);
 }
 
 sub uciprint {
@@ -846,13 +991,14 @@ sub handle_tb_lookup_return {
                                my $moves = $pgn->moves;
                                my @uci_moves = ();
                                for my $move (@$moves) {
-                                       my ($from_row, $from_col, $to_row, $to_col, $promo) = $pvpos->parse_pretty_move($move);
-                                       push @uci_moves, Board::move_to_uci_notation($from_row, $from_col, $to_row, $to_col, $promo);
-                                       $pvpos = $pvpos->make_move($from_row, $from_col, $to_row, $to_col, $promo);
+                                       my $uci_move;
+                                       ($pvpos, $uci_move) = $pvpos->make_pretty_move($move);
+                                       push @uci_moves, $uci_move;
                                }
                                $tb_cache{$fen} = {
                                        result => $pgn->result,
-                                       pv => \@uci_moves
+                                       pv => \@uci_moves,
+                                       score => $response->{'Response'}{'Score'},
                                };
                                output();
                        }