+ 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: $@";
+ exit;
+ $getting_movelist = 0;
+ }
+ }
+ if ($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->{'history'} = \@uci_movelist;
+ $pos->{'pretty_history'} = \@pretty_movelist;
+ }
+ }
+ $getting_movelist = 0;
+ }
+ if ($line =~ /^([A-Za-z]+)(?:\([A-Z]+\))* tells you: (.*)$/) {
+ my ($who, $msg) = ($1, $2);
+
+ next if (grep { $_ eq $who } (@remoteglotconf::masters) == 0);
+
+ if ($msg =~ /^fics (.*?)$/) {
+ $t->cmd("tell $who Executing '$1' on FICS.");
+ $t->cmd($1);
+ } elsif ($msg =~ /^uci (.*?)$/) {
+ $t->cmd("tell $who Sending '$1' to the engine.");
+ print { $engine->{'write'} } "$1\n";
+ } elsif ($msg =~ /^pgn (.*?)$/) {
+ my $url = $1;
+ $t->cmd("tell $who Starting to poll '$url'.");
+ fetch_pgn($url);
+ } elsif ($msg =~ /^stoppgn$/) {
+ $t->cmd("tell $who Stopping poll.");
+ $http_timer = undef;
+ } elsif ($msg =~ /^quit$/) {
+ $t->cmd("tell $who Bye bye.");
+ exit;
+ } else {
+ $t->cmd("tell $who Couldn't understand '$msg', sorry.");
+ }
+ }
+ #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) = @_;
+ 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 $uci_move;
+ ($pos, $uci_move) = $pos->make_pretty_move($move);
+ push @uci_moves, $uci_move;
+ }
+ $pos->{'history'} = \@uci_moves;
+ $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);
+ }
+ }
+
+ $http_timer = AnyEvent->timer(after => 1.0, cb => sub {
+ fetch_pgn($url);
+ });
+}
+
+sub handle_position {
+ my ($pos) = @_;
+
+ # if this is already in the queue, ignore it
+ return if (defined($pos_waiting) && $pos->fen() eq $pos_waiting->fen());
+
+ # if we're already chewing on this and there's nothing else in the queue,
+ # also ignore it
+ return if (!defined($pos_waiting) && defined($pos_calculating) &&
+ $pos->fen() eq $pos_calculating->fen());
+
+ # if we're already thinking on something, stop and wait for the engine
+ # to approve
+ if (defined($pos_calculating)) {
+ if (!defined($pos_waiting)) {
+ uciprint($engine, "stop");
+ }
+ if ($remoteglotconf::uci_assume_full_compliance) {
+ $pos_waiting = $pos;
+ } else {
+ uciprint($engine, "position fen " . $pos->fen());
+ uciprint($engine, "go infinite");
+ $pos_calculating = $pos;
+ }
+ } else {
+ # it's wrong just to give the FEN (the move history is useful,
+ # and per the UCI spec, we should really have sent "ucinewgame"),
+ # but it's easier
+ uciprint($engine, "position fen " . $pos->fen());
+ uciprint($engine, "go infinite");
+ $pos_calculating = $pos;
+ }
+
+ if (defined($engine2)) {
+ if (defined($pos_calculating_second_engine)) {
+ uciprint($engine2, "stop");
+ } else {
+ uciprint($engine2, "position fen " . $pos->fen());
+ uciprint($engine2, "go infinite");
+ $pos_calculating_second_engine = $pos;
+ }
+ $engine2->{'info'} = {};
+ }
+
+ $engine->{'info'} = {};
+ $last_move = time;
+
+ schedule_tb_lookup();
+
+ #
+ # Output a command every move to note that we're
+ # still paying attention -- this is a good tradeoff,
+ # since if no move has happened in the last half
+ # hour, the analysis/relay has most likely stopped
+ # and we should stop hogging server resources.
+ #
+ $t->cmd("date");