server/lib/cf.pm

package cf;

use Symbol;
use List::Util;
use Storable;
use Opcode;
use Safe;
use Safe::Hole;

use Time::HiRes;
use Event;
$Event::Eval = 1; # no idea why this is required, but it is

use strict;

our %COMMAND = ();
our @EVENT;
our @PLUGIN_EVENT;
our %PROP_TYPE;
our %PROP_IDX;
our $LIBDIR = maps_directory "perl";

our $TICK = MAX_TIME * 1e-6;
our $TICK_WATCHER;
our $NEXT_TICK;

BEGIN {
   @PLUGIN_EVENT = map lc, @PLUGIN_EVENT;

   *CORE::GLOBAL::warn = sub {
      my $msg = join "", @_;
      $msg .= "\n"
         unless $msg =~ /\n$/;

      print STDERR "cfperl: $msg";
      LOG llevError, "cfperl: $msg";
   };
}

my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!

# generate property mutators
sub prop_gen {
   my ($prefix, $class) = @_;

   no strict 'refs';

   for my $prop (keys %PROP_TYPE) {
      $prop =~ /^\Q$prefix\E_(.*$)/ or next;
      my $sub = lc $1;

      my $type = $PROP_TYPE{$prop};
      my $idx  = $PROP_IDX {$prop};

      *{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
         $_[0]->get_property ($type, $idx)
      };

      *{"$class\::set_$sub"} = sub {
         $_[0]->set_property ($type, $idx, $_[1]);
      } unless $ignore_set{$prop};
   }
}

# auto-generate most of the API

prop_gen OBJECT_PROP => "cf::object";
# CFAPI_OBJECT_ANIMATION?
prop_gen PLAYER_PROP => "cf::object::player";

prop_gen MAP_PROP    => "cf::map";
prop_gen ARCH_PROP   => "cf::arch";

# guessed hierarchies

@ext::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
@ext::cf::object::map::ISA    = @cf::object::map::ISA    = 'cf::object';

# we bless all objects into derived classes to force a method lookup
# within the Safe compartment.
for my $pkg (qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region cf::arch)) {
   no strict 'refs';
   @{"ext::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
}

$Event::DIED = sub {
   warn "error in event callback: @_";
};

my %ext_pkg;
my @exts;
my @hook;
my %command;
my %extcmd;

#############################################################################
# "new" plug-in system

=item cf::object::attach ... # NYI

=item cf::attach_global ... # NYI

=item cf::attach_to_type ... # NYI

=item cf::attach_to_objects ... # NYI

=item cf::attach_to_players ... # NYI

=item cf::attach_to_maps ... # NYI

   prio    => $number, # higehr is earlier
   on_xxx  => \&cb,
   package => package::,

=cut

our %CB_CLASS  = (); # registry for class-based events
our @CB_GLOBAL = (); # registry for all global events
our @CB_TYPE   = (); # registry for type (cf-object class) based events

sub _attach_cb($\%$$$) {
   my ($registry, $undo, $event, $prio, $cb) = @_;

   use sort 'stable';

   $cb = [$prio, $cb];

   @{$registry->[$event]} = sort
                           { $a->[0] cmp $b->[0] }
                           @{$registry->[$event] || []}, $cb;

   push @{$undo->{cb}}, [$event, $cb];
}

# attach handles attaching event callbacks
# the only thing the caller has to do is pass the correct
# registry (== where the callback attaches to).
sub _attach(\@$\@) {
   my ($registry, $klass, $arg) = @_;

   my $prio = 0;

   my %undo = (
      registry => $registry,
      cb       => [],
   );

   my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;

   while (@$arg) {
      my $type = shift @$arg;

      if ($type eq "prio") {
         $prio = shift @$arg;

      } elsif ($type eq "package") {
         my $pkg = shift @$arg;

         while (my ($name, $id) = each %cb_id) {
            if (my $cb = $pkg->can ($name)) {
               _attach_cb $registry, %undo, $id, $prio, $cb;
            }
         }

      } elsif (exists $cb_id{$type}) {
         _attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @$arg;

      } elsif (ref $type) {
         warn "attaching objects not supported, ignoring.\n";

      } else {
         shift @$arg;
         warn "attach argument '$type' not supported, ignoring.\n";
      }
   }

   \%undo
}

sub cf::object::attach {
   die;
}

sub attach_global {
   _attach @CB_GLOBAL, KLASS_GLOBAL, @_
}

sub attach_type {
   my $type = shift;
   _attach @{$CB_TYPE[$type]}, KLASS_MAP, @_
}

sub attach_to_objects {
   _attach @{$CB_CLASS{cf::object::wrap::}}, KLASS_OBJECT, @_
}

sub attach_to_players {
   _attach @{$CB_CLASS{cf::player::wrap::}}, KLASS_PLAYER, @_
}

sub attach_to_maps {
   _attach @{$CB_CLASS{cf::map::wrap::}}, KLASS_MAP, @_
}

our $override;

sub override() {
   $override = 1
}

sub invoke {
   my $event = shift;

   my @cb;

   if (my $ref = ref $_[0]) {
      # 1. object-specific (NYI)
      # 2. class-specific
      push @cb, @{$CB_CLASS{$ref}[$event] || []};
   }

   # global
   push @cb, @{$CB_GLOBAL[$event] || []};

#   warn "invoke id $EVENT[$event][0], args <@_> <=> @cb\n";#d#

   local $override;

   for (@cb) {
      eval { &{$_->[1]} };

      if ($@) {
         warn "$@";
         warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";
         override;
      }

      return 1 if $override;
   }

   0
}

#############################################################################
# old plug-in events

sub inject_event {
   my $extension = shift;
   my $event_code = shift;

   my $cb = $hook[$event_code]{$extension}
      or return;

   &$cb
}

sub inject_global_event {
   my $event = shift;

   my $cb = $hook[$event]
      or return;

   List::Util::max map &$_, values %$cb
}

sub inject_command {
   my ($name, $obj, $params) = @_;

   for my $cmd (@{ $command{$name} }) {
      $cmd->[1]->($obj, $params);
   }

   -1
}

sub register_command {
   my ($name, $time, $cb) = @_;

   my $caller = caller;
   #warn "registering command '$name/$time' to '$caller'";

   push @{ $command{$name} }, [$time, $cb, $caller];
   $COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
}

sub register_extcmd {
   my ($name, $cb) = @_;

   my $caller = caller;
   #warn "registering extcmd '$name' to '$caller'";

   $extcmd{$name} = [$cb, $caller];
}

sub register {
   my ($base, $pkg) = @_;

   for my $idx (0 .. $#PLUGIN_EVENT) {
      if (my $ref = $pkg->can ("on_$PLUGIN_EVENT[$idx]")) {
         #warn "registering $PLUGIN_EVENT[$idx] hook to '$pkg'\n";
         $hook[$idx]{$base} = $ref;
      }
   }
}

sub load_extension {
   my ($path) = @_;

   $path =~ /([^\/\\]+)\.ext$/ or die "$path";
   my $base = $1;
   my $pkg = $1;
   $pkg =~ s/[^[:word:]]/_/g;
   $pkg = "cf::ext::$pkg";

   warn "loading '$path' into '$pkg'\n";

   open my $fh, "<:utf8", $path
      or die "$path: $!";

   my $source =
      "package $pkg; use strict; use utf8;\n"
      . "#line 1 \"$path\"\n{\n"
      . (do { local $/; <$fh> })
      . "\n};\n1";

   eval $source
      or die "$path: $@";

   push @exts, $pkg;
   $ext_pkg{$base} = $pkg;

#   no strict 'refs';
#   @{"$pkg\::ISA"} = ext::;

   register $base, $pkg;
}

sub unload_extension {
   my ($pkg) = @_;

   warn "removing extension $pkg\n";

   # remove hooks
   for my $idx (0 .. $#PLUGIN_EVENT) {
      delete $hook[$idx]{$pkg};
   }

   # remove commands
   for my $name (keys %command) {
      my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };

      if (@cb) {
         $command{$name} = \@cb;
         $COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
      } else {
         delete $command{$name};
         delete $COMMAND{"$name\000"};
      }
   }

   # remove extcmds
   for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {
      delete $extcmd{$name};
   }

   if (my $cb = $pkg->can ("on_unload")) {
      eval {
         $cb->($pkg);
         1
      } or warn "$pkg unloaded, but with errors: $@";
   }

   Symbol::delete_package $pkg;
}

sub load_extensions {
   my $LIBDIR = maps_directory "perl";

   for my $ext (<$LIBDIR/*.ext>) {
      next unless -r $ext;
      eval {
         load_extension $ext;
         1
      } or warn "$ext not loaded: $@";
   }
}

sub _perl_reload(&) {
   my ($msg) = @_;

   $msg->("reloading...");

   eval {
      # 1. cancel all watchers
      $_->cancel for Event::all_watchers;

      # 2. unload all extensions
      for (@exts) {
         $msg->("unloading <$_>");
         unload_extension $_;
      }

      # 3. unload all modules loaded from $LIBDIR
      while (my ($k, $v) = each %INC) {
         next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;

         $msg->("removing <$k>");
         delete $INC{$k};

         $k =~ s/\.pm$//;
         $k =~ s/\//::/g;

         if (my $cb = $k->can ("unload_module")) {
            $cb->();
         }

         Symbol::delete_package $k;
      }

      # 4. get rid of ext::, as good as possible
      Symbol::delete_package "ext::$_"
         for qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region);

      # 5. remove register_script_function callbacks
      # TODO
      
      # 6. unload cf.pm "a bit"
      delete $INC{"cf.pm"};

      # don't, removes xs symbols, too
      #Symbol::delete_package __PACKAGE__;

      # 7. reload cf.pm
      $msg->("reloading cf.pm");
      require cf;
   };
   $msg->($@) if $@;

   $msg->("reloaded");
};

sub perl_reload() {
   _perl_reload {
      warn $_[0];
      print "$_[0]\n";
   };
}

register_command "perl-reload", 0, sub {
   my ($who, $arg) = @_;

   if ($who->flag (FLAG_WIZ)) {
      _perl_reload {
         warn $_[0];
         $who->message ($_[0]);
      };
   }
};

#############################################################################
# utility functions

use JSON::Syck (); # TODO# replace by JSON::PC once working

sub from_json($) {
   $JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
   JSON::Syck::Load $_[0]
}

sub to_json($) {
   $JSON::Syck::ImplicitUnicode = 0;  # work around JSON::Syck bugs
   JSON::Syck::Dump $_[0]
}

#############################################################################
# extcmd framework, basically convert ext <msg>
# into pkg::->on_extcmd_arg1 (...) while shortcutting a few

sub on_extcmd {
   my ($pl, $buf) = @_;

   my $msg = eval { from_json $buf };

   if (ref $msg) {
      if (my $cb = $extcmd{$msg->{msgtype}}) {
         if (my %reply = $cb->[0]->($pl, $msg)) {
            $pl->ext_reply ($msg->{msgid}, %reply);
         }
      }
   } else {
      warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
   }

   1
}

#############################################################################
# load/save/clean perl data associated with a map

*cf::mapsupport::on_clean = sub {
   my ($map) = @_;

   my $path = $map->tmpname;
   defined $path or return;

   unlink "$path.cfperl";
};

*cf::mapsupport::on_swapin =
*cf::mapsupport::on_load = sub {
   my ($map) = @_;

   my $path = $map->tmpname;
   $path = $map->path unless defined $path;

   open my $fh, "<:raw", "$path.cfperl"
      or return; # no perl data

   my $data = Storable::thaw do { local $/; <$fh> };

   $data->{version} <= 1
      or return; # too new

   $map->_set_obs ($data->{obs});
};

*cf::mapsupport::on_swapout = sub {
   my ($map) = @_;

   my $path = $map->tmpname;
   $path = $map->path unless defined $path;

   my $obs = $map->_get_obs;

   if (defined $obs) {
      open my $fh, ">:raw", "$path.cfperl"
         or die "$path.cfperl: $!";

      stat $path;

      print $fh Storable::nfreeze {
         size    => (stat _)[7],
         time    => (stat _)[9],
         version => 1,
         obs     => $obs,
      };

      chmod SAVE_MODE, "$path.cfperl"; # very racy, but cf-compatible *g*
   } else {
      unlink "$path.cfperl";
   }
};

attach_to_maps prio => -10000, package => cf::mapsupport::;

#############################################################################
# load/save perl data associated with player->ob objects

sub all_objects(@) {
   @_, map all_objects ($_->inv), @_
}

attach_to_players
   on_load => sub {
      my ($pl, $path) = @_;

      for my $o (all_objects $pl->ob) {
         if (my $value = $o->get_ob_key_value ("_perl_data")) {
            $o->set_ob_key_value ("_perl_data");

            %$o = %{ Storable::thaw pack "H*", $value };
         }
      }
   },
   on_save => sub {
      my ($pl, $path) = @_;

      $_->set_ob_key_value (_perl_data => unpack "H*", Storable::nfreeze $_)
         for grep %$_, all_objects $pl->ob;
   },
;

#############################################################################
# core extensions - in perl

=item cf::player::exists $login

Returns true when the given account exists.

=cut

sub cf::player::exists($) {
   cf::player::find $_[0]
      or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
}

=item $player->reply ($npc, $msg[, $flags])

Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
can be C<undef>. Does the right thing when the player is currently in a
dialogue with the given NPC character.

=cut

# rough implementation of a future "reply" method that works
# with dialog boxes.
sub cf::object::player::reply($$$;$) {
   my ($self, $npc, $msg, $flags) = @_;

   $flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;

   if ($self->{record_replies}) {
      push @{ $self->{record_replies} }, [$npc, $msg, $flags];
   } else {
      $msg = $npc->name . " says: $msg" if $npc;
      $self->message ($msg, $flags);
   }
}

=item $player->ext_reply ($msgid, $msgtype, %msg)

Sends an ext reply to the player.

=cut

sub cf::player::ext_reply($$$%) {
   my ($self, $id, %msg) = @_;

   $msg{msgid} = $id;

   $self->send ("ext " . to_json \%msg);
}

#############################################################################
# map scripting support

our $safe = new Safe "ext";
our $safe_hole = new Safe::Hole;

$SIG{FPE} = 'IGNORE';

$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));

# here we export the classes and methods available to script code

for (
   ["cf::object"         => qw(contr pay_amount pay_player)],
   ["cf::object::player" => qw(player)],
   ["cf::player"         => qw(peaceful)],
) {
   no strict 'refs';
   my ($pkg, @funs) = @$_;
   *{"ext::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
      for @funs;
}

sub safe_eval($;@) {
   my ($code, %vars) = @_;

   my $qcode = $code;
   $qcode =~ s/"/‟/g; # not allowed in #line filenames
   $qcode =~ s/\n/\\n/g;

   local $_;
   local @ext::cf::_safe_eval_args = values %vars;

   $code =
      "do {\n"
      . "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
      . "#line 0 \"{$qcode}\"\n"
      . $code
      . "\n}"
   ;

   sub_generation_inc;
   my @res = wantarray ? $safe->reval ($code) : scalar $safe->reval ($code);
   sub_generation_inc;

   wantarray ? @res : $res[0]
}

sub register_script_function {
   my ($fun, $cb) = @_;

   no strict 'refs';
   *{"ext::$fun"} = $safe_hole->wrap ($cb);
}

#############################################################################
# the server's main()

sub main {
   Event::loop;
}

#############################################################################
# initialisation

register "<global>", __PACKAGE__;

unshift @INC, $LIBDIR;

load_extensions;

$TICK_WATCHER = Event->timer (
   prio => 1,
   at   => $NEXT_TICK || 1,
   cb   => sub {
      cf::server_tick; # one server iteration

      my $NOW = Event::time;
      $NEXT_TICK += $TICK;

      # if we are delayed by four ticks, skip them all
      $NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;

      $TICK_WATCHER->at ($NEXT_TICK);
      $TICK_WATCHER->start;
   },
);

1

Revision:	1.39
Committed:	Fri Aug 25 13:24:50 2006 UTC (17 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.38:	+175 -21 lines
Log Message:	Implemented a rough outline of the new event system and made use of it for a number of events. The corresponding plugin-events have been disabled.
#	User	Rev	Content
1	root	1.1	package cf;
2
3			use Symbol;
4			use List::Util;
5	root	1.6	use Storable;
6	root	1.23	use Opcode;
7			use Safe;
8			use Safe::Hole;
9	root	1.19
10	root	1.32	use Time::HiRes;
11	root	1.18	use Event;
12	root	1.19	$Event::Eval = 1; # no idea why this is required, but it is
13	root	1.1
14			use strict;
15
16	root	1.39	our %COMMAND = ();
17	root	1.1	our @EVENT;
18	root	1.38	our @PLUGIN_EVENT;
19	root	1.1	our %PROP_TYPE;
20			our %PROP_IDX;
21	root	1.27	our $LIBDIR = maps_directory "perl";
22	root	1.1
23	root	1.35	our $TICK = MAX_TIME * 1e-6;
24			our $TICK_WATCHER;
25			our $NEXT_TICK;
26
27	root	1.1	BEGIN {
28	root	1.38	@PLUGIN_EVENT = map lc, @PLUGIN_EVENT;
29	root	1.1
30			*CORE::GLOBAL::warn = sub {
31			my $msg = join "", @_;
32			$msg .= "\n"
33			unless $msg =~ /\n$/;
34
35			print STDERR "cfperl: $msg";
36			LOG llevError, "cfperl: $msg";
37			};
38			}
39
40	root	1.9	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!
41
42	root	1.1	# generate property mutators
43			sub prop_gen {
44			my ($prefix, $class) = @_;
45
46			no strict 'refs';
47
48			for my $prop (keys %PROP_TYPE) {
49			$prop =~ /^\Q$prefix\E_(.*$)/ or next;
50			my $sub = lc $1;
51
52			my $type = $PROP_TYPE{$prop};
53			my $idx = $PROP_IDX {$prop};
54
55			{"$class\::get_$sub"} = {"$class\::$sub"} = sub {
56			$_[0]->get_property ($type, $idx)
57			};
58
59			*{"$class\::set_$sub"} = sub {
60			$_[0]->set_property ($type, $idx, $_[1]);
61	root	1.9	} unless $ignore_set{$prop};
62	root	1.1	}
63			}
64
65			# auto-generate most of the API
66
67			prop_gen OBJECT_PROP => "cf::object";
68			# CFAPI_OBJECT_ANIMATION?
69			prop_gen PLAYER_PROP => "cf::object::player";
70
71			prop_gen MAP_PROP => "cf::map";
72			prop_gen ARCH_PROP => "cf::arch";
73
74			# guessed hierarchies
75
76	root	1.25	@ext::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
77			@ext::cf::object::map::ISA = @cf::object::map::ISA = 'cf::object';
78
79			# we bless all objects into derived classes to force a method lookup
80			# within the Safe compartment.
81	elmex	1.30	for my $pkg (qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region cf::arch)) {
82	root	1.25	no strict 'refs';
83			@{"ext::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
84			}
85	root	1.1
86	root	1.18	$Event::DIED = sub {
87			warn "error in event callback: @_";
88			};
89
90	root	1.5	my %ext_pkg;
91	root	1.1	my @exts;
92			my @hook;
93			my %command;
94	root	1.15	my %extcmd;
95	root	1.1
96	root	1.39	#############################################################################
97			# "new" plug-in system
98
99			=item cf::object::attach ... # NYI
100
101			=item cf::attach_global ... # NYI
102
103			=item cf::attach_to_type ... # NYI
104
105			=item cf::attach_to_objects ... # NYI
106
107			=item cf::attach_to_players ... # NYI
108
109			=item cf::attach_to_maps ... # NYI
110
111			prio => $number, # higehr is earlier
112			on_xxx => \&cb,
113			package => package::,
114
115			=cut
116
117			our %CB_CLASS = (); # registry for class-based events
118			our @CB_GLOBAL = (); # registry for all global events
119			our @CB_TYPE = (); # registry for type (cf-object class) based events
120
121			sub _attach_cb($\%$$$) {
122			my ($registry, $undo, $event, $prio, $cb) = @_;
123
124			use sort 'stable';
125
126			$cb = [$prio, $cb];
127
128			@{$registry->[$event]} = sort
129			{ $a->[0] cmp $b->[0] }
130			@{$registry->[$event] \|\| []}, $cb;
131
132			push @{$undo->{cb}}, [$event, $cb];
133			}
134
135			# attach handles attaching event callbacks
136			# the only thing the caller has to do is pass the correct
137			# registry (== where the callback attaches to).
138			sub _attach(\@$\@) {
139			my ($registry, $klass, $arg) = @_;
140
141			my $prio = 0;
142
143			my %undo = (
144			registry => $registry,
145			cb => [],
146			);
147
148			my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
149
150			while (@$arg) {
151			my $type = shift @$arg;
152
153			if ($type eq "prio") {
154			$prio = shift @$arg;
155
156			} elsif ($type eq "package") {
157			my $pkg = shift @$arg;
158
159			while (my ($name, $id) = each %cb_id) {
160			if (my $cb = $pkg->can ($name)) {
161			_attach_cb $registry, %undo, $id, $prio, $cb;
162			}
163			}
164
165			} elsif (exists $cb_id{$type}) {
166			_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @$arg;
167
168			} elsif (ref $type) {
169			warn "attaching objects not supported, ignoring.\n";
170
171			} else {
172			shift @$arg;
173			warn "attach argument '$type' not supported, ignoring.\n";
174			}
175			}
176
177			\%undo
178			}
179
180			sub cf::object::attach {
181			die;
182			}
183
184			sub attach_global {
185			_attach @CB_GLOBAL, KLASS_GLOBAL, @_
186			}
187
188			sub attach_type {
189			my $type = shift;
190			_attach @{$CB_TYPE[$type]}, KLASS_MAP, @_
191			}
192
193			sub attach_to_objects {
194			_attach @{$CB_CLASS{cf::object::wrap::}}, KLASS_OBJECT, @_
195			}
196
197			sub attach_to_players {
198			_attach @{$CB_CLASS{cf::player::wrap::}}, KLASS_PLAYER, @_
199			}
200
201			sub attach_to_maps {
202			_attach @{$CB_CLASS{cf::map::wrap::}}, KLASS_MAP, @_
203			}
204
205			our $override;
206
207			sub override() {
208			$override = 1
209			}
210
211			sub invoke {
212			my $event = shift;
213
214			my @cb;
215
216			if (my $ref = ref $_[0]) {
217			# 1. object-specific (NYI)
218			# 2. class-specific
219			push @cb, @{$CB_CLASS{$ref}[$event] \|\| []};
220			}
221
222			# global
223			push @cb, @{$CB_GLOBAL[$event] \|\| []};
224
225			# warn "invoke id $EVENT[$event][0], args <@_> <=> @cb\n";#d#
226
227			local $override;
228
229			for (@cb) {
230			eval { &{$_->[1]} };
231
232			if ($@) {
233			warn "$@";
234			warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";
235			override;
236			}
237
238			return 1 if $override;
239			}
240
241			0
242			}
243
244			#############################################################################
245			# old plug-in events
246
247	root	1.1	sub inject_event {
248	root	1.14	my $extension = shift;
249			my $event_code = shift;
250	root	1.1
251	root	1.14	my $cb = $hook[$event_code]{$extension}
252	root	1.5	or return;
253
254	root	1.14	&$cb
255	root	1.5	}
256
257			sub inject_global_event {
258	root	1.12	my $event = shift;
259	root	1.5
260	root	1.12	my $cb = $hook[$event]
261	root	1.1	or return;
262
263	root	1.12	List::Util::max map &$_, values %$cb
264	root	1.1	}
265
266			sub inject_command {
267			my ($name, $obj, $params) = @_;
268
269			for my $cmd (@{ $command{$name} }) {
270			$cmd->[1]->($obj, $params);
271			}
272
273			-1
274			}
275
276			sub register_command {
277			my ($name, $time, $cb) = @_;
278
279			my $caller = caller;
280	root	1.16	#warn "registering command '$name/$time' to '$caller'";
281	root	1.4
282	root	1.1	push @{ $command{$name} }, [$time, $cb, $caller];
283			$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
284			}
285
286	root	1.16	sub register_extcmd {
287			my ($name, $cb) = @_;
288
289			my $caller = caller;
290			#warn "registering extcmd '$name' to '$caller'";
291
292			$extcmd{$name} = [$cb, $caller];
293			}
294
295	root	1.6	sub register {
296			my ($base, $pkg) = @_;
297
298	root	1.38	for my $idx (0 .. $#PLUGIN_EVENT) {
299			if (my $ref = $pkg->can ("on_$PLUGIN_EVENT[$idx]")) {
300			#warn "registering $PLUGIN_EVENT[$idx] hook to '$pkg'\n";
301	root	1.6	$hook[$idx]{$base} = $ref;
302			}
303			}
304			}
305
306	root	1.1	sub load_extension {
307			my ($path) = @_;
308
309			$path =~ /([^\/\\]+)\.ext$/ or die "$path";
310	root	1.5	my $base = $1;
311	root	1.1	my $pkg = $1;
312			$pkg =~ s/[^[:word:]]/_/g;
313			$pkg = "cf::ext::$pkg";
314
315			warn "loading '$path' into '$pkg'\n";
316
317			open my $fh, "<:utf8", $path
318			or die "$path: $!";
319
320			my $source =
321			"package $pkg; use strict; use utf8;\n"
322			. "#line 1 \"$path\"\n{\n"
323			. (do { local $/; <$fh> })
324			. "\n};\n1";
325
326			eval $source
327			or die "$path: $@";
328
329			push @exts, $pkg;
330	root	1.5	$ext_pkg{$base} = $pkg;
331	root	1.1
332	root	1.6	# no strict 'refs';
333	root	1.23	# @{"$pkg\::ISA"} = ext::;
334	root	1.1
335	root	1.6	register $base, $pkg;
336	root	1.1	}
337
338			sub unload_extension {
339			my ($pkg) = @_;
340
341			warn "removing extension $pkg\n";
342
343			# remove hooks
344	root	1.38	for my $idx (0 .. $#PLUGIN_EVENT) {
345	root	1.1	delete $hook[$idx]{$pkg};
346			}
347
348			# remove commands
349			for my $name (keys %command) {
350			my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };
351
352			if (@cb) {
353			$command{$name} = \@cb;
354			$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
355			} else {
356			delete $command{$name};
357			delete $COMMAND{"$name\000"};
358			}
359			}
360
361	root	1.15	# remove extcmds
362	root	1.16	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {
363			delete $extcmd{$name};
364	root	1.15	}
365
366	elmex	1.31	if (my $cb = $pkg->can ("on_unload")) {
367			eval {
368			$cb->($pkg);
369			1
370			} or warn "$pkg unloaded, but with errors: $@";
371			}
372
373	root	1.1	Symbol::delete_package $pkg;
374			}
375
376			sub load_extensions {
377			my $LIBDIR = maps_directory "perl";
378
379			for my $ext (<$LIBDIR/*.ext>) {
380	root	1.3	next unless -r $ext;
381	root	1.2	eval {
382			load_extension $ext;
383			1
384			} or warn "$ext not loaded: $@";
385	root	1.1	}
386			}
387
388	root	1.36	sub _perl_reload(&) {
389			my ($msg) = @_;
390
391			$msg->("reloading...");
392
393			eval {
394			# 1. cancel all watchers
395			$_->cancel for Event::all_watchers;
396
397			# 2. unload all extensions
398			for (@exts) {
399			$msg->("unloading <$_>");
400			unload_extension $_;
401			}
402
403			# 3. unload all modules loaded from $LIBDIR
404			while (my ($k, $v) = each %INC) {
405			next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
406
407			$msg->("removing <$k>");
408			delete $INC{$k};
409	root	1.1
410	root	1.36	$k =~ s/\.pm$//;
411			$k =~ s/\//::/g;
412	root	1.3
413	root	1.36	if (my $cb = $k->can ("unload_module")) {
414			$cb->();
415	root	1.27	}
416
417	root	1.36	Symbol::delete_package $k;
418			}
419	root	1.27
420	root	1.36	# 4. get rid of ext::, as good as possible
421			Symbol::delete_package "ext::$_"
422			for qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region);
423
424			# 5. remove register_script_function callbacks
425			# TODO
426
427			# 6. unload cf.pm "a bit"
428			delete $INC{"cf.pm"};
429
430			# don't, removes xs symbols, too
431			#Symbol::delete_package __PACKAGE__;
432
433			# 7. reload cf.pm
434			$msg->("reloading cf.pm");
435			require cf;
436			};
437			$msg->($@) if $@;
438	root	1.27
439	root	1.36	$msg->("reloaded");
440			};
441	root	1.27
442	root	1.36	sub perl_reload() {
443			_perl_reload {
444			warn $_[0];
445			print "$_[0]\n";
446			};
447			}
448	root	1.27
449	root	1.36	register_command "perl-reload", 0, sub {
450			my ($who, $arg) = @_;
451	root	1.27
452	root	1.36	if ($who->flag (FLAG_WIZ)) {
453			_perl_reload {
454			warn $_[0];
455			$who->message ($_[0]);
456	root	1.4	};
457	root	1.1	}
458			};
459
460	root	1.8	#############################################################################
461	root	1.28	# utility functions
462
463			use JSON::Syck (); # TODO# replace by JSON::PC once working
464
465			sub from_json($) {
466	root	1.29	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
467	root	1.28	JSON::Syck::Load $_[0]
468			}
469
470			sub to_json($) {
471	root	1.29	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
472	root	1.28	JSON::Syck::Dump $_[0]
473			}
474
475			#############################################################################
476			# extcmd framework, basically convert ext <msg>
477	root	1.15	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
478
479			sub on_extcmd {
480			my ($pl, $buf) = @_;
481
482	root	1.28	my $msg = eval { from_json $buf };
483
484			if (ref $msg) {
485			if (my $cb = $extcmd{$msg->{msgtype}}) {
486			if (my %reply = $cb->[0]->($pl, $msg)) {
487			$pl->ext_reply ($msg->{msgid}, %reply);
488			}
489			}
490			} else {
491			warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
492			}
493	root	1.15
494	root	1.28	1
495	root	1.15	}
496
497			#############################################################################
498	root	1.8	# load/save/clean perl data associated with a map
499
500	root	1.39	*cf::mapsupport::on_clean = sub {
501	root	1.13	my ($map) = @_;
502	root	1.7
503			my $path = $map->tmpname;
504			defined $path or return;
505
506			unlink "$path.cfperl";
507			};
508
509	root	1.39	*cf::mapsupport::on_swapin =
510			*cf::mapsupport::on_load = sub {
511	root	1.13	my ($map) = @_;
512	root	1.6
513			my $path = $map->tmpname;
514			$path = $map->path unless defined $path;
515
516			open my $fh, "<:raw", "$path.cfperl"
517			or return; # no perl data
518
519			my $data = Storable::thaw do { local $/; <$fh> };
520
521			$data->{version} <= 1
522			or return; # too new
523
524			$map->_set_obs ($data->{obs});
525			};
526
527	root	1.39	*cf::mapsupport::on_swapout = sub {
528	root	1.13	my ($map) = @_;
529	root	1.6
530			my $path = $map->tmpname;
531			$path = $map->path unless defined $path;
532
533			my $obs = $map->_get_obs;
534
535			if (defined $obs) {
536			open my $fh, ">:raw", "$path.cfperl"
537			or die "$path.cfperl: $!";
538
539	root	1.8	stat $path;
540
541			print $fh Storable::nfreeze {
542			size => (stat _)[7],
543			time => (stat _)[9],
544			version => 1,
545			obs => $obs,
546			};
547
548			chmod SAVE_MODE, "$path.cfperl"; # very racy, but cf-compatible g
549			} else {
550			unlink "$path.cfperl";
551			}
552			};
553
554	root	1.39	attach_to_maps prio => -10000, package => cf::mapsupport::;
555
556	root	1.8	#############################################################################
557			# load/save perl data associated with player->ob objects
558
559	root	1.33	sub all_objects(@) {
560			@_, map all_objects ($_->inv), @_
561			}
562
563	root	1.39	attach_to_players
564			on_load => sub {
565			my ($pl, $path) = @_;
566
567			for my $o (all_objects $pl->ob) {
568			if (my $value = $o->get_ob_key_value ("_perl_data")) {
569			$o->set_ob_key_value ("_perl_data");
570	root	1.8
571	root	1.39	%$o = %{ Storable::thaw pack "H*", $value };
572			}
573	root	1.11	}
574	root	1.39	},
575			on_save => sub {
576			my ($pl, $path) = @_;
577	root	1.8
578	root	1.39	$_->set_ob_key_value (_perl_data => unpack "H*", Storable::nfreeze $_)
579			for grep %$_, all_objects $pl->ob;
580			},
581			;
582	root	1.6
583	root	1.22	#############################################################################
584			# core extensions - in perl
585
586	root	1.23	=item cf::player::exists $login
587
588			Returns true when the given account exists.
589
590			=cut
591
592			sub cf::player::exists($) {
593			cf::player::find $_[0]
594			or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
595			}
596
597	root	1.28	=item $player->reply ($npc, $msg[, $flags])
598
599			Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
600			can be C<undef>. Does the right thing when the player is currently in a
601			dialogue with the given NPC character.
602
603			=cut
604
605	root	1.22	# rough implementation of a future "reply" method that works
606			# with dialog boxes.
607	root	1.23	sub cf::object::player::reply($$$;$) {
608			my ($self, $npc, $msg, $flags) = @_;
609
610			$flags = cf::NDI_BROWN \| cf::NDI_UNIQUE unless @_ >= 4;
611	root	1.22
612	root	1.24	if ($self->{record_replies}) {
613			push @{ $self->{record_replies} }, [$npc, $msg, $flags];
614			} else {
615			$msg = $npc->name . " says: $msg" if $npc;
616			$self->message ($msg, $flags);
617			}
618	root	1.22	}
619
620	root	1.28	=item $player->ext_reply ($msgid, $msgtype, %msg)
621
622			Sends an ext reply to the player.
623
624			=cut
625
626			sub cf::player::ext_reply($$$%) {
627			my ($self, $id, %msg) = @_;
628
629			$msg{msgid} = $id;
630
631			$self->send ("ext " . to_json \%msg);
632			}
633
634	root	1.22	#############################################################################
635	root	1.23	# map scripting support
636
637			our $safe = new Safe "ext";
638			our $safe_hole = new Safe::Hole;
639
640			$SIG{FPE} = 'IGNORE';
641
642			$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
643
644	root	1.25	# here we export the classes and methods available to script code
645
646			for (
647	root	1.27	["cf::object" => qw(contr pay_amount pay_player)],
648	root	1.25	["cf::object::player" => qw(player)],
649			["cf::player" => qw(peaceful)],
650			) {
651			no strict 'refs';
652			my ($pkg, @funs) = @$_;
653			*{"ext::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
654			for @funs;
655			}
656	root	1.23
657			sub safe_eval($;@) {
658			my ($code, %vars) = @_;
659
660			my $qcode = $code;
661			$qcode =~ s/"/‟/g; # not allowed in #line filenames
662			$qcode =~ s/\n/\\n/g;
663
664			local $_;
665			local @ext::cf::_safe_eval_args = values %vars;
666
667	root	1.25	$code =
668	root	1.23	"do {\n"
669			. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
670			. "#line 0 \"{$qcode}\"\n"
671			. $code
672			. "\n}"
673	root	1.25	;
674
675			sub_generation_inc;
676			my @res = wantarray ? $safe->reval ($code) : scalar $safe->reval ($code);
677			sub_generation_inc;
678
679			wantarray ? @res : $res[0]
680	root	1.23	}
681
682			sub register_script_function {
683			my ($fun, $cb) = @_;
684
685			no strict 'refs';
686			*{"ext::$fun"} = $safe_hole->wrap ($cb);
687			}
688
689			#############################################################################
690	root	1.34	# the server's main()
691
692	root	1.39	sub main {
693	root	1.34	Event::loop;
694			}
695
696			#############################################################################
697	root	1.22	# initialisation
698
699	root	1.6	register "<global>", __PACKAGE__;
700
701	root	1.27	unshift @INC, $LIBDIR;
702	root	1.17
703	root	1.1	load_extensions;
704
705	root	1.35	$TICK_WATCHER = Event->timer (
706			prio => 1,
707			at => $NEXT_TICK \|\| 1,
708			cb => sub {
709			cf::server_tick; # one server iteration
710
711			my $NOW = Event::time;
712			$NEXT_TICK += $TICK;
713
714	root	1.37	# if we are delayed by four ticks, skip them all
715			$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;
716	root	1.35
717			$TICK_WATCHER->at ($NEXT_TICK);
718			$TICK_WATCHER->start;
719			},
720			);
721
722	root	1.1	1
723