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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.12 by root, Tue Mar 28 16:48:11 2006 UTC vs.
Revision 1.113 by root, Mon Jan 1 15:32:40 2007 UTC

1	package cf;	1	package cf;
		2
		3	use utf8;
		4	use strict;
2		5
3	use Symbol;	6	use Symbol;
4	use List::Util;	7	use List::Util;
5	use Storable;	8	use Storable;
		9	use Opcode;
		10	use Safe;
		11	use Safe::Hole;
6		12
7	use strict;	13	use Coro 3.3;
		14	use Coro::Event;
		15	use Coro::Timer;
		16	use Coro::Signal;
		17	use Coro::Semaphore;
		18	use Coro::AIO;
8		19
9	our %COMMAND;	20	use Digest::MD5;
		21	use Fcntl;
		22	use IO::AIO 2.31 ();
		23	use YAML::Syck ();
		24	use Time::HiRes;
		25
		26	use Event; $Event::Eval = 1; # no idea why this is required, but it is
		27
		28	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		29	$YAML::Syck::ImplicitUnicode = 1;
		30
		31	$Coro::main->prio (2); # run main coroutine ("the server") with very high priority
		32
		33	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		34
		35	our %COMMAND = ();
		36	our %COMMAND_TIME = ();
		37	our %EXTCMD = ();
		38
10	our @EVENT;	39	our @EVENT;
11	our %PROP_TYPE;	40	our $LIBDIR = datadir . "/ext";
12	our %PROP_IDX;	41
		42	our $TICK = MAX_TIME * 1e-6;
		43	our $TICK_WATCHER;
		44	our $NEXT_TICK;
		45	our $NOW;
		46
		47	our %CFG;
		48
		49	our $UPTIME; $UPTIME ||= time;
		50	our $RUNTIME;
		51
		52	our %MAP; # all maps
		53	our $LINK_MAP; # the special {link} map
		54	our $FREEZE;
		55	our $RANDOM_MAPS = cf::localdir . "/random";
		56	our %EXT_CORO;
		57
		58	binmode STDOUT;
		59	binmode STDERR;
		60
		61	# read virtual server time, if available
		62	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		63	open my $fh, "<", cf::localdir . "/runtime"
		64	or die "unable to read runtime file: $!";
		65	$RUNTIME = <$fh> + 0.;
		66	}
		67
		68	mkdir cf::localdir;
		69	mkdir cf::localdir . "/" . cf::playerdir;
		70	mkdir cf::localdir . "/" . cf::tmpdir;
		71	mkdir cf::localdir . "/" . cf::uniquedir;
		72	mkdir $RANDOM_MAPS;
		73
		74	# a special map that is always available
		75	our $LINK_MAP;
		76
		77	our $EMERGENCY_POSITION = $cf::CFG{emergency_position} || ["/world/world_105_115", 5, 37];
		78
		79	#############################################################################
		80
		81	=head2 GLOBAL VARIABLES
		82
		83	=over 4
		84
		85	=item $cf::UPTIME
		86
		87	The timestamp of the server start (so not actually an uptime).
		88
		89	=item $cf::RUNTIME
		90
		91	The time this server has run, starts at 0 and is increased by $cf::TICK on
		92	every server tick.
		93
		94	=item $cf::LIBDIR
		95
		96	The perl library directory, where extensions and cf-specific modules can
		97	be found. It will be added to C<@INC> automatically.
		98
		99	=item $cf::NOW
		100
		101	The time of the last (current) server tick.
		102
		103	=item $cf::TICK
		104
		105	The interval between server ticks, in seconds.
		106
		107	=item %cf::CFG
		108
		109	Configuration for the server, loaded from C</etc/crossfire/config>, or
		110	from wherever your confdir points to.
		111
		112	=back
		113
		114	=cut
13		115
14	BEGIN {	116	BEGIN {
15	@EVENT = map lc, @EVENT;
16
17	*CORE::GLOBAL::warn = sub {	117	*CORE::GLOBAL::warn = sub {
18	my $msg = join "", @_;	118	my $msg = join "", @_;
		119	utf8::encode $msg;
		120
19	$msg .= "\n"	121	$msg .= "\n"
20	unless $msg =~ /\n$/;	122	unless $msg =~ /\n$/;
21		123
22	print STDERR "cfperl: $msg";
23	LOG llevError, "cfperl: $msg";	124	LOG llevError, "cfperl: $msg";
24	};	125	};
25	}	126	}
26		127
27	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	128	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
		129	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
		130	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		131	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		132	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
		133	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
28		134
29	# generate property mutators	135	# we bless all objects into (empty) derived classes to force a method lookup
30	sub prop_gen {	136	# within the Safe compartment.
31	my ($prefix, $class) = @_;	137	for my $pkg (qw(
32		138	cf::global cf::attachable
		139	cf::object cf::object::player
		140	cf::client cf::player
		141	cf::arch cf::living
		142	cf::map cf::party cf::region
		143	)) {
33	no strict 'refs';	144	no strict 'refs';
34		145	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
35	for my $prop (keys %PROP_TYPE) {
36	$prop =~ /^\Q$prefix\E_(.*$)/ or next;
37	my $sub = lc $1;
38
39	my $type = $PROP_TYPE{$prop};
40	my $idx = $PROP_IDX {$prop};
41
42	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
43	$_[0]->get_property ($type, $idx)
44	};
45
46	*{"$class\::set_$sub"} = sub {
47	$_[0]->set_property ($type, $idx, $_[1]);
48	} unless $ignore_set{$prop};
49	}
50	}	146	}
51		147
52	# auto-generate most of the API	148	$Event::DIED = sub {
53		149	warn "error in event callback: @_";
54	prop_gen OBJECT_PROP => "cf::object";	150	};
55	# CFAPI_OBJECT_ANIMATION?
56	prop_gen PLAYER_PROP => "cf::object::player";
57
58	prop_gen MAP_PROP => "cf::map";
59	prop_gen ARCH_PROP => "cf::arch";
60
61	# guessed hierarchies
62
63	@cf::object::player::ISA = 'cf::object';
64	@cf::object::map::ISA = 'cf::object';
65		151
66	my %ext_pkg;	152	my %ext_pkg;
67	my @exts;	153	my @exts;
68	my @hook;	154	my @hook;
69	my %command;
70		155
71	sub inject_event {	156	=head2 UTILITY FUNCTIONS
		157
		158	=over 4
		159
		160	=cut
		161
		162	use JSON::Syck (); # TODO# replace by JSON::PC once working
		163
		164	=item $ref = cf::from_json $json
		165
		166	Converts a JSON string into the corresponding perl data structure.
		167
		168	=cut
		169
		170	sub from_json($) {
		171	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
		172	JSON::Syck::Load $_[0]
		173	}
		174
		175	=item $json = cf::to_json $ref
		176
		177	Converts a perl data structure into its JSON representation.
		178
		179	=cut
		180
		181	sub to_json($) {
		182	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
		183	JSON::Syck::Dump $_[0]
		184	}
		185
		186	=item cf::sync_job { BLOCK }
		187
		188	The design of crossfire+ requires that the main coro ($Coro::main) is
		189	always able to handle events or runnable, as crossfire+ is only partly
		190	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		191
		192	If it must be done, put the blocking parts into C<sync_job>. This will run
		193	the given BLOCK in another coroutine while waiting for the result. The
		194	server will be frozen during this time, so the block should either finish
		195	fast or be very important.
		196
		197	=cut
		198
		199	sub sync_job(&) {
72	my ($data) = @_;	200	my ($job) = @_;
73		201
74	my $cb = $hook[$data->{event_code}]{$data->{extension}}	202	if ($Coro::current == $Coro::main) {
		203	# this is the main coro, too bad, we have to block
		204	# till the operation succeeds, freezing the server :/
		205
		206	# TODO: use suspend/resume instead
		207	# (but this is cancel-safe)
		208	local $FREEZE = 1;
		209
		210	my $busy = 1;
		211	my @res;
		212
		213	(Coro::async {
		214	@res = eval { $job->() };
		215	warn $@ if $@;
		216	undef $busy;
		217	})->prio (Coro::PRIO_MAX);
		218
		219	while ($busy) {
		220	Coro::cede_notself;
		221	Event::one_event unless Coro::nready;
		222	}
		223
		224	wantarray ? @res : $res[0]
		225	} else {
		226	# we are in another coroutine, how wonderful, everything just works
		227
		228	$job->()
		229	}
		230	}
		231
		232	=item $coro = cf::coro { BLOCK }
		233
		234	Creates and returns a new coro. This coro is automcatially being canceled
		235	when the extension calling this is being unloaded.
		236
		237	=cut
		238
		239	sub coro(&) {
		240	my $cb = shift;
		241
		242	my $coro; $coro = async {
		243	eval {
		244	$cb->();
		245	};
		246	warn $@ if $@;
		247	};
		248
		249	$coro->on_destroy (sub {
		250	delete $EXT_CORO{$coro+0};
		251	});
		252	$EXT_CORO{$coro+0} = $coro;
		253
		254	$coro
		255	}
		256
		257	sub write_runtime {
		258	my $runtime = cf::localdir . "/runtime";
		259
		260	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
75	or return;	261	or return;
76		262
77	$cb->($data)	263	my $value = $cf::RUNTIME + 1 + 10; # 10 is the runtime save interval, for a monotonic clock
78	}	264	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		265	and return;
79		266
80	sub inject_global_event {	267	aio_fsync $fh
		268	and return;
		269
		270	close $fh
		271	or return;
		272
		273	aio_rename "$runtime~", $runtime
		274	and return;
		275
		276	1
		277	}
		278
		279	=back
		280
		281	=cut
		282
		283	#############################################################################
		284
		285	package cf::path;
		286
		287	sub new {
		288	my ($class, $path, $base) = @_;
		289
		290	$path = $path->as_string if ref $path;
		291
		292	my $self = bless { }, $class;
		293
		294	if ($path =~ s{^\?random/}{}) {
		295	Coro::AIO::aio_load "$cf::RANDOM_MAPS/$path.meta", my $data;
		296	$self->{random} = cf::from_json $data;
		297	} else {
		298	if ($path =~ s{^~([^/]+)?}{}) {
		299	$self->{user_rel} = 1;
		300
		301	if (defined $1) {
		302	$self->{user} = $1;
		303	} elsif ($base =~ m{^~([^/]+)/}) {
		304	$self->{user} = $1;
		305	} else {
		306	warn "cannot resolve user-relative path without user <$path,$base>\n";
		307	}
		308	} elsif ($path =~ /^\//) {
		309	# already absolute
		310	} else {
		311	$base =~ s{[^/]+/?$}{};
		312	return $class->new ("$base/$path");
		313	}
		314
		315	for ($path) {
		316	redo if s{/\.?/}{/};
		317	redo if s{/[^/]+/\.\./}{/};
		318	}
		319	}
		320
		321	$self->{path} = $path;
		322
		323	$self
		324	}
		325
		326	# the name / primary key / in-game path
		327	sub as_string {
		328	my ($self) = @_;
		329
		330	$self->{user_rel} ? "~$self->{user}$self->{path}"
		331	: $self->{random} ? "?random/$self->{path}"
		332	: $self->{path}
		333	}
		334
		335	# the displayed name, this is a one way mapping
		336	sub visible_name {
		337	my ($self) = @_;
		338
		339	# if (my $rmp = $self->{random}) {
		340	# # todo: be more intelligent about this
		341	# "?random/$rmp->{origin_map}+$rmp->{origin_x}+$rmp->{origin_y}/$rmp->{dungeon_level}"
		342	# } else {
		343	$self->as_string
		344	# }
		345	}
		346
		347	# escape the /'s in the path
		348	sub _escaped_path {
		349	# ∕ is U+2215
		350	(my $path = $_[0]{path}) =~ s/\//∕/g;
		351	$path
		352	}
		353
		354	# the original (read-only) location
		355	sub load_path {
		356	my ($self) = @_;
		357
		358	sprintf "%s/%s/%s", cf::datadir, cf::mapdir, $self->{path}
		359	}
		360
		361	# the temporary/swap location
		362	sub save_path {
		363	my ($self) = @_;
		364
		365	$self->{user_rel} ? sprintf "%s/%s/%s/%s", cf::localdir, cf::playerdir, $self->{user}, $self->_escaped_path
		366	: $self->{random} ? sprintf "%s/%s", $RANDOM_MAPS, $self->{path}
		367	: sprintf "%s/%s/%s", cf::localdir, cf::tmpdir, $self->_escaped_path
		368	}
		369
		370	# the unique path, might be eq to save_path
		371	sub uniq_path {
		372	my ($self) = @_;
		373
		374	$self->{user_rel} || $self->{random}
		375	? undef
		376	: sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $self->_escaped_path
		377	}
		378
		379	# return random map parameters, or undef
		380	sub random_map_params {
		381	my ($self) = @_;
		382
		383	$self->{random}
		384	}
		385
		386	# this is somewhat ugly, but style maps do need special treatment
		387	sub is_style_map {
		388	$_[0]{path} =~ m{^/styles/}
		389	}
		390
		391	package cf;
		392
		393	#############################################################################
		394
		395	=head2 ATTACHABLE OBJECTS
		396
		397	Many objects in crossfire are so-called attachable objects. That means you can
		398	attach callbacks/event handlers (a collection of which is called an "attachment")
		399	to it. All such attachable objects support the following methods.
		400
		401	In the following description, CLASS can be any of C<global>, C<object>
		402	C<player>, C<client> or C<map> (i.e. the attachable objects in
		403	crossfire+).
		404
		405	=over 4
		406
		407	=item $attachable->attach ($attachment, key => $value...)
		408
		409	=item $attachable->detach ($attachment)
		410
		411	Attach/detach a pre-registered attachment to a specific object and give it
		412	the specified key/value pairs as arguments.
		413
		414	Example, attach a minesweeper attachment to the given object, making it a
		415	10x10 minesweeper game:
		416
		417	$obj->attach (minesweeper => width => 10, height => 10);
		418
		419	=item $bool = $attachable->attached ($name)
		420
		421	Checks wether the named attachment is currently attached to the object.
		422
		423	=item cf::CLASS->attach ...
		424
		425	=item cf::CLASS->detach ...
		426
		427	Define an anonymous attachment and attach it to all objects of the given
		428	CLASS. See the next function for an explanation of its arguments.
		429
		430	You can attach to global events by using the C<cf::global> class.
		431
		432	Example, log all player logins:
		433
		434	cf::player->attach (
		435	on_login => sub {
		436	my ($pl) = @_;
		437	...
		438	},
		439	);
		440
		441	Example, attach to the jeweler skill:
		442
		443	cf::object->attach (
		444	type => cf::SKILL,
		445	subtype => cf::SK_JEWELER,
		446	on_use_skill => sub {
		447	my ($sk, $ob, $part, $dir, $msg) = @_;
		448	...
		449	},
		450	);
		451
		452	=item cf::CLASS::attachment $name, ...
		453
		454	Register an attachment by C<$name> through which attachable objects of the
		455	given CLASS can refer to this attachment.
		456
		457	Some classes such as crossfire maps and objects can specify attachments
		458	that are attached at load/instantiate time, thus the need for a name.
		459
		460	These calls expect any number of the following handler/hook descriptions:
		461
		462	=over 4
		463
		464	=item prio => $number
		465
		466	Set the priority for all following handlers/hooks (unless overwritten
		467	by another C<prio> setting). Lower priority handlers get executed
		468	earlier. The default priority is C<0>, and many built-in handlers are
		469	registered at priority C<-1000>, so lower priorities should not be used
		470	unless you know what you are doing.
		471
		472	=item type => $type
		473
		474	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		475	given type of objects only (the additional parameter C<subtype> can be
		476	used to further limit to the given subtype).
		477
		478	=item on_I<event> => \&cb
		479
		480	Call the given code reference whenever the named event happens (event is
		481	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
		482	handlers are recognised generally depends on the type of object these
		483	handlers attach to).
		484
		485	See F<include/eventinc.h> for the full list of events supported, and their
		486	class.
		487
		488	=item package => package::
		489
		490	Look for sub functions of the name C<< on_I<event> >> in the given
		491	package and register them. Only handlers for eevents supported by the
		492	object/class are recognised.
		493
		494	=back
		495
		496	Example, define an attachment called "sockpuppet" that calls the given
		497	event handler when a monster attacks:
		498
		499	cf::object::attachment sockpuppet =>
		500	on_skill_attack => sub {
		501	my ($self, $victim) = @_;
		502	...
		503	}
		504	}
		505
		506	=item $attachable->valid
		507
		508	Just because you have a perl object does not mean that the corresponding
		509	C-level object still exists. If you try to access an object that has no
		510	valid C counterpart anymore you get an exception at runtime. This method
		511	can be used to test for existence of the C object part without causing an
		512	exception.
		513
		514	=cut
		515
		516	# the following variables are defined in .xs and must not be re-created
		517	our @CB_GLOBAL = (); # registry for all global events
		518	our @CB_ATTACHABLE = (); # registry for all attachables
		519	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		520	our @CB_PLAYER = ();
		521	our @CB_CLIENT = ();
		522	our @CB_TYPE = (); # registry for type (cf-object class) based events
		523	our @CB_MAP = ();
		524
		525	my %attachment;
		526
		527	sub _attach_cb($$$$) {
		528	my ($registry, $event, $prio, $cb) = @_;
		529
		530	use sort 'stable';
		531
		532	$cb = [$prio, $cb];
		533
		534	@{$registry->[$event]} = sort
		535	{ $a->[0] cmp $b->[0] }
		536	@{$registry->[$event] || []}, $cb;
		537	}
		538
		539	# hack
		540	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		541
		542	# attach handles attaching event callbacks
		543	# the only thing the caller has to do is pass the correct
		544	# registry (== where the callback attaches to).
		545	sub _attach {
		546	my ($registry, $klass, @arg) = @_;
		547
		548	my $object_type;
		549	my $prio = 0;
		550	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		551
		552	#TODO: get rid of this hack
		553	if ($attachable_klass{$klass}) {
		554	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		555	}
		556
		557	while (@arg) {
		558	my $type = shift @arg;
		559
		560	if ($type eq "prio") {
		561	$prio = shift @arg;
		562
		563	} elsif ($type eq "type") {
		564	$object_type = shift @arg;
		565	$registry = $CB_TYPE[$object_type] ||= [];
		566
		567	} elsif ($type eq "subtype") {
		568	defined $object_type or Carp::croak "subtype specified without type";
		569	my $object_subtype = shift @arg;
		570	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		571
		572	} elsif ($type eq "package") {
		573	my $pkg = shift @arg;
		574
		575	while (my ($name, $id) = each %cb_id) {
		576	if (my $cb = $pkg->can ($name)) {
		577	_attach_cb $registry, $id, $prio, $cb;
		578	}
		579	}
		580
		581	} elsif (exists $cb_id{$type}) {
		582	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		583
		584	} elsif (ref $type) {
		585	warn "attaching objects not supported, ignoring.\n";
		586
		587	} else {
		588	shift @arg;
		589	warn "attach argument '$type' not supported, ignoring.\n";
		590	}
		591	}
		592	}
		593
		594	sub _object_attach {
		595	my ($obj, $name, %arg) = @_;
		596
		597	return if exists $obj->{_attachment}{$name};
		598
		599	if (my $attach = $attachment{$name}) {
		600	my $registry = $obj->registry;
		601
		602	for (@$attach) {
		603	my ($klass, @attach) = @$_;
		604	_attach $registry, $klass, @attach;
		605	}
		606
		607	$obj->{$name} = \%arg;
		608	} else {
		609	warn "object uses attachment '$name' that is not available, postponing.\n";
		610	}
		611
		612	$obj->{_attachment}{$name} = undef;
		613	}
		614
		615	sub cf::attachable::attach {
		616	if (ref $_[0]) {
		617	_object_attach @_;
		618	} else {
		619	_attach shift->_attach_registry, @_;
		620	}
		621	};
		622
		623	# all those should be optimised
		624	sub cf::attachable::detach {
		625	my ($obj, $name) = @_;
		626
		627	if (ref $obj) {
		628	delete $obj->{_attachment}{$name};
		629	reattach ($obj);
		630	} else {
		631	Carp::croak "cannot, currently, detach class attachments";
		632	}
		633	};
		634
		635	sub cf::attachable::attached {
		636	my ($obj, $name) = @_;
		637
		638	exists $obj->{_attachment}{$name}
		639	}
		640
		641	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		642	eval "#line " . __LINE__ . " 'cf.pm'
		643	sub cf::\L$klass\E::_attach_registry {
		644	(\\\@CB_$klass, KLASS_$klass)
		645	}
		646
		647	sub cf::\L$klass\E::attachment {
		648	my \$name = shift;
		649
		650	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		651	}
		652	";
		653	die if $@;
		654	}
		655
		656	our $override;
		657	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		658
		659	sub override {
		660	$override = 1;
		661	@invoke_results = ();
		662	}
		663
		664	sub do_invoke {
81	my $event = shift;	665	my $event = shift;
		666	my $callbacks = shift;
82		667
83	my $cb = $hook[$event]	668	@invoke_results = ();
		669
		670	local $override;
		671
		672	for (@$callbacks) {
		673	eval { &{$_->[1]} };
		674
		675	if ($@) {
		676	warn "$@";
		677	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		678	override;
		679	}
		680
		681	return 1 if $override;
		682	}
		683
		684	0
		685	}
		686
		687	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		688
		689	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		690
		691	Generate an object-specific event with the given arguments.
		692
		693	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		694	removed in future versions), and there is no public API to access override
		695	results (if you must, access C<@cf::invoke_results> directly).
		696
		697	=back
		698
		699	=cut
		700
		701	#############################################################################
		702	# object support
		703
		704	sub reattach {
		705	# basically do the same as instantiate, without calling instantiate
		706	my ($obj) = @_;
		707
		708	my $registry = $obj->registry;
		709
		710	@$registry = ();
		711
		712	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		713
		714	for my $name (keys %{ $obj->{_attachment} || {} }) {
		715	if (my $attach = $attachment{$name}) {
		716	for (@$attach) {
		717	my ($klass, @attach) = @$_;
		718	_attach $registry, $klass, @attach;
		719	}
		720	} else {
		721	warn "object uses attachment '$name' that is not available, postponing.\n";
		722	}
		723	}
		724	}
		725
		726	cf::attachable->attach (
		727	prio => -1000000,
		728	on_instantiate => sub {
		729	my ($obj, $data) = @_;
		730
		731	$data = from_json $data;
		732
		733	for (@$data) {
		734	my ($name, $args) = @$_;
		735
		736	$obj->attach ($name, %{$args || {} });
		737	}
		738	},
		739	on_reattach => \&reattach,
		740	on_clone => sub {
		741	my ($src, $dst) = @_;
		742
		743	@{$dst->registry} = @{$src->registry};
		744
		745	%$dst = %$src;
		746
		747	%{$dst->{_attachment}} = %{$src->{_attachment}}
		748	if exists $src->{_attachment};
		749	},
		750	);
		751
		752	sub object_freezer_save {
		753	my ($filename, $rdata, $objs) = @_;
		754
		755	sync_job {
		756	if (length $$rdata) {
		757	warn sprintf "saving %s (%d,%d)\n",
		758	$filename, length $$rdata, scalar @$objs;
		759
		760	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		761	chmod SAVE_MODE, $fh;
		762	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		763	aio_fsync $fh;
		764	close $fh;
		765
		766	if (@$objs) {
		767	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		768	chmod SAVE_MODE, $fh;
		769	my $data = Storable::nfreeze { version => 1, objs => $objs };
		770	aio_write $fh, 0, (length $data), $data, 0;
		771	aio_fsync $fh;
		772	close $fh;
		773	aio_rename "$filename.pst~", "$filename.pst";
		774	}
		775	} else {
		776	aio_unlink "$filename.pst";
		777	}
		778
		779	aio_rename "$filename~", $filename;
		780	} else {
		781	warn "FATAL: $filename~: $!\n";
		782	}
		783	} else {
		784	aio_unlink $filename;
		785	aio_unlink "$filename.pst";
		786	}
		787	}
		788	}
		789
		790	sub object_freezer_as_string {
		791	my ($rdata, $objs) = @_;
		792
		793	use Data::Dumper;
		794
		795	$$rdata . Dumper $objs
		796	}
		797
		798	sub object_thawer_load {
		799	my ($filename) = @_;
		800
		801	my ($data, $av);
		802
		803	(aio_load $filename, $data) >= 0
84	or return;	804	or return;
85		805
86	List::Util::max map &$_, values %$cb	806	unless (aio_stat "$filename.pst") {
87	}	807	(aio_load "$filename.pst", $av) >= 0
88		808	or return;
89	sub inject_command {	809	$av = eval { (Storable::thaw $av)->{objs} };
90	my ($name, $obj, $params) = @_;
91
92	for my $cmd (@{ $command{$name} }) {
93	$cmd->[1]->($obj, $params);
94	}	810	}
95		811
96	-1	812	return ($data, $av);
97	}	813	}
		814
		815	#############################################################################
		816	# command handling &c
		817
		818	=item cf::register_command $name => \&callback($ob,$args);
		819
		820	Register a callback for execution when the client sends the user command
		821	$name.
		822
		823	=cut
98		824
99	sub register_command {	825	sub register_command {
100	my ($name, $time, $cb) = @_;	826	my ($name, $cb) = @_;
101		827
102	my $caller = caller;	828	my $caller = caller;
103
104	warn "registering command '$name/$time' to '$caller'";	829	#warn "registering command '$name/$time' to '$caller'";
105		830
106	push @{ $command{$name} }, [$time, $cb, $caller];	831	push @{ $COMMAND{$name} }, [$caller, $cb];
107	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
108	}	832	}
		833
		834	=item cf::register_extcmd $name => \&callback($pl,$packet);
		835
		836	Register a callbackf ro execution when the client sends an extcmd packet.
		837
		838	If the callback returns something, it is sent back as if reply was being
		839	called.
		840
		841	=cut
		842
		843	sub register_extcmd {
		844	my ($name, $cb) = @_;
		845
		846	my $caller = caller;
		847	#warn "registering extcmd '$name' to '$caller'";
		848
		849	$EXTCMD{$name} = [$cb, $caller];
		850	}
		851
		852	cf::player->attach (
		853	on_command => sub {
		854	my ($pl, $name, $params) = @_;
		855
		856	my $cb = $COMMAND{$name}
		857	or return;
		858
		859	for my $cmd (@$cb) {
		860	$cmd->[1]->($pl->ob, $params);
		861	}
		862
		863	cf::override;
		864	},
		865	on_extcmd => sub {
		866	my ($pl, $buf) = @_;
		867
		868	my $msg = eval { from_json $buf };
		869
		870	if (ref $msg) {
		871	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		872	if (my %reply = $cb->[0]->($pl, $msg)) {
		873	$pl->ext_reply ($msg->{msgid}, %reply);
		874	}
		875	}
		876	} else {
		877	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		878	}
		879
		880	cf::override;
		881	},
		882	);
109		883
110	sub register {	884	sub register {
111	my ($base, $pkg) = @_;	885	my ($base, $pkg) = @_;
112		886
113	for my $idx (0 .. $#EVENT) {	887	#TODO
114	if (my $ref = $pkg->can ("on_$EVENT[$idx]")) {
115	warn "registering $EVENT[$idx] hook to '$pkg'\n";
116	$hook[$idx]{$base} = $ref;
117	}
118	}
119	}	888	}
120		889
121	sub load_extension {	890	sub load_extension {
122	my ($path) = @_;	891	my ($path) = @_;
123		892
124	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	893	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
125	my $base = $1;	894	my $base = $1;
126	my $pkg = $1;	895	my $pkg = $1;
127	$pkg =~ s/[^[:word:]]/_/g;	896	$pkg =~ s/[^[:word:]]/_/g;
128	$pkg = "cf::ext::$pkg";	897	$pkg = "ext::$pkg";
129		898
130	warn "loading '$path' into '$pkg'\n";	899	warn "loading '$path' into '$pkg'\n";
131		900
132	open my $fh, "<:utf8", $path	901	open my $fh, "<:utf8", $path
133	or die "$path: $!";	902	or die "$path: $!";
…		…
137	. "#line 1 \"$path\"\n{\n"	906	. "#line 1 \"$path\"\n{\n"
138	. (do { local $/; <$fh> })	907	. (do { local $/; <$fh> })
139	. "\n};\n1";	908	. "\n};\n1";
140		909
141	eval $source	910	eval $source
142	or die "$path: $@";	911	or die $@ ? "$path: $@\n"
		912	: "extension disabled.\n";
143		913
144	push @exts, $pkg;	914	push @exts, $pkg;
145	$ext_pkg{$base} = $pkg;	915	$ext_pkg{$base} = $pkg;
146		916
147	# no strict 'refs';	917	# no strict 'refs';
148	# @{"$pkg\::ISA"} = cf::ext::;	918	# @{"$pkg\::ISA"} = ext::;
149		919
150	register $base, $pkg;	920	register $base, $pkg;
151	}	921	}
152		922
153	sub unload_extension {	923	sub unload_extension {
154	my ($pkg) = @_;	924	my ($pkg) = @_;
155		925
156	warn "removing extension $pkg\n";	926	warn "removing extension $pkg\n";
157		927
158	# remove hooks	928	# remove hooks
		929	#TODO
159	for my $idx (0 .. $#EVENT) {	930	# for my $idx (0 .. $#PLUGIN_EVENT) {
160	delete $hook[$idx]{$pkg};	931	# delete $hook[$idx]{$pkg};
161	}	932	# }
162		933
163	# remove commands	934	# remove commands
164	for my $name (keys %command) {	935	for my $name (keys %COMMAND) {
165	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	936	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
166		937
167	if (@cb) {	938	if (@cb) {
168	$command{$name} = \@cb;	939	$COMMAND{$name} = \@cb;
169	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
170	} else {	940	} else {
171	delete $command{$name};
172	delete $COMMAND{"$name\000"};	941	delete $COMMAND{$name};
173	}	942	}
		943	}
		944
		945	# remove extcmds
		946	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
		947	delete $EXTCMD{$name};
		948	}
		949
		950	if (my $cb = $pkg->can ("unload")) {
		951	eval {
		952	$cb->($pkg);
		953	1
		954	} or warn "$pkg unloaded, but with errors: $@";
174	}	955	}
175		956
176	Symbol::delete_package $pkg;	957	Symbol::delete_package $pkg;
177	}	958	}
178		959
179	sub load_extensions {	960	sub load_extensions {
180	my $LIBDIR = maps_directory "perl";
181
182	for my $ext (<$LIBDIR/*.ext>) {	961	for my $ext (<$LIBDIR/*.ext>) {
183	next unless -r $ext;	962	next unless -r $ext;
184	eval {	963	eval {
185	load_extension $ext;	964	load_extension $ext;
186	1	965	1
187	} or warn "$ext not loaded: $@";	966	} or warn "$ext not loaded: $@";
188	}	967	}
189	}	968	}
190		969
191	register_command "perl-reload", 0, sub {	970	#############################################################################
		971	# load/save/clean perl data associated with a map
		972
		973	*cf::mapsupport::on_clean = sub {
		974	my ($map) = @_;
		975
		976	my $path = $map->tmpname;
		977	defined $path or return;
		978
		979	unlink "$path.pst";
		980	};
		981
		982	cf::map->attach (prio => -10000, package => cf::mapsupport::);
		983
		984	#############################################################################
		985	# load/save perl data associated with player->ob objects
		986
		987	sub all_objects(@) {
		988	@_, map all_objects ($_->inv), @_
		989	}
		990
		991	# TODO: compatibility cruft, remove when no longer needed
		992	cf::player->attach (
		993	on_load => sub {
		994	my ($pl, $path) = @_;
		995
		996	for my $o (all_objects $pl->ob) {
		997	if (my $value = $o->get_ob_key_value ("_perl_data")) {
		998	$o->set_ob_key_value ("_perl_data");
		999
		1000	%$o = %{ Storable::thaw pack "H*", $value };
		1001	}
		1002	}
		1003	},
		1004	);
		1005
		1006	#############################################################################
		1007
		1008	=head2 CORE EXTENSIONS
		1009
		1010	Functions and methods that extend core crossfire objects.
		1011
		1012	=head3 cf::player
		1013
		1014	=over 4
		1015
		1016	=item cf::player::exists $login
		1017
		1018	Returns true when the given account exists.
		1019
		1020	=cut
		1021
		1022	sub cf::player::exists($) {
		1023	cf::player::find $_[0]
		1024	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
		1025	}
		1026
		1027	=item $player->ext_reply ($msgid, $msgtype, %msg)
		1028
		1029	Sends an ext reply to the player.
		1030
		1031	=cut
		1032
		1033	sub cf::player::ext_reply($$$%) {
		1034	my ($self, $id, %msg) = @_;
		1035
		1036	$msg{msgid} = $id;
		1037
		1038	$self->send ("ext " . to_json \%msg);
		1039	}
		1040
		1041	=back
		1042
		1043
		1044	=head3 cf::map
		1045
		1046	=over 4
		1047
		1048	=cut
		1049
		1050	package cf::map;
		1051
		1052	use Fcntl;
		1053	use Coro::AIO;
		1054
		1055	our $MAX_RESET = 7200;
		1056	our $DEFAULT_RESET = 3600;
		1057
		1058	sub generate_random_map {
192	my ($who, $arg) = @_;	1059	my ($path, $rmp) = @_;
193		1060
194	if ($who->flag (FLAG_WIZ)) {	1061	# mit "rum" bekleckern, nicht
195	$who->message ("reloading...");	1062	cf::map::_create_random_map
		1063	$path,
		1064	$rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
		1065	$rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
		1066	$rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
		1067	$rmp->{exit_on_final_map},
		1068	$rmp->{xsize}, $rmp->{ysize},
		1069	$rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
		1070	$rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
		1071	$rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
		1072	$rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
		1073	$rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
		1074	(cf::region::find $rmp->{region})
		1075	}
196		1076
197	warn "reloading...\n";	1077	# and all this just because we cannot iterate over
		1078	# all maps in C++...
		1079	sub change_all_map_light {
		1080	my ($change) = @_;
		1081
		1082	$_->change_map_light ($change) for values %cf::MAP;
		1083	}
		1084
		1085	sub try_load_header($) {
		1086	my ($path) = @_;
		1087
		1088	utf8::encode $path;
		1089	aio_open $path, O_RDONLY, 0
		1090	or return;
		1091
		1092	my $map = cf::map::new
		1093	or return;
		1094
		1095	$map->load_header ($path)
		1096	or return;
		1097
		1098	$map->{load_path} = $path;
		1099
		1100	$map
		1101	}
		1102
		1103	sub find_map {
		1104	my ($path, $origin) = @_;
		1105
		1106	#warn "find_map<$path,$origin>\n";#d#
		1107
		1108	$path = new cf::path $path, $origin && $origin->path;
		1109	my $key = $path->as_string;
		1110
		1111	$cf::MAP{$key} || do {
		1112	# do it the slow way
		1113	my $map = try_load_header $path->save_path;
		1114
		1115	if ($map) {
		1116	# safety
		1117	$map->{instantiate_time} = $cf::RUNTIME
		1118	if $map->{instantiate_time} > $cf::RUNTIME;
		1119	} else {
		1120	if (my $rmp = $path->random_map_params) {
		1121	$map = generate_random_map $key, $rmp;
		1122	} else {
		1123	$map = try_load_header $path->load_path;
		1124	}
		1125
		1126	$map or return;
		1127
		1128	$map->{load_original} = 1;
		1129	$map->{instantiate_time} = $cf::RUNTIME;
		1130	$map->instantiate;
		1131
		1132	# per-player maps become, after loading, normal maps
		1133	$map->per_player (0) if $path->{user_rel};
		1134	}
		1135
		1136	$map->path ($key);
		1137	$map->{path} = $path;
		1138	$map->last_access ($cf::RUNTIME);
		1139
		1140	if ($map->should_reset) {
		1141	$map->reset;
		1142	$map = find_map $path;
		1143	}
		1144
		1145	$cf::MAP{$key} = $map
		1146	}
		1147	}
		1148
		1149	sub load {
		1150	my ($self) = @_;
		1151
		1152	return if $self->in_memory != cf::MAP_SWAPPED;
		1153
		1154	$self->in_memory (cf::MAP_LOADING);
		1155
		1156	my $path = $self->{path};
		1157
		1158	$self->alloc;
		1159	$self->load_objects ($self->{load_path}, 1)
		1160	or return;
		1161
		1162	$self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
		1163	if delete $self->{load_original};
		1164
		1165	if (my $uniq = $path->uniq_path) {
		1166	utf8::encode $uniq;
		1167	if (aio_open $uniq, O_RDONLY, 0) {
		1168	$self->clear_unique_items;
		1169	$self->load_objects ($uniq, 0);
		1170	}
		1171	}
		1172
		1173	# now do the right thing for maps
		1174	$self->link_multipart_objects;
		1175
		1176	if ($self->{path}->is_style_map) {
		1177	$self->{deny_save} = 1;
		1178	$self->{deny_reset} = 1;
		1179	} else {
		1180	$self->fix_auto_apply;
		1181	$self->decay_objects;
		1182	$self->update_buttons;
		1183	$self->set_darkness_map;
		1184	$self->difficulty ($self->estimate_difficulty)
		1185	unless $self->difficulty;
		1186	$self->activate;
		1187	}
		1188
		1189	$self->in_memory (cf::MAP_IN_MEMORY);
		1190	}
		1191
		1192	sub load_map_sync {
		1193	my ($path, $origin) = @_;
		1194
		1195	#warn "load_map_sync<$path, $origin>\n";#d#
		1196
		1197	cf::sync_job {
		1198	my $map = cf::map::find_map $path, $origin
		1199	or return;
		1200	$map->load;
		1201	$map
		1202	}
		1203	}
		1204
		1205	sub save {
		1206	my ($self) = @_;
		1207
		1208	my $save = $self->{path}->save_path; utf8::encode $save;
		1209	my $uniq = $self->{path}->uniq_path; utf8::encode $uniq;
		1210
		1211	$self->{last_save} = $cf::RUNTIME;
		1212
		1213	return unless $self->dirty;
		1214
		1215	$self->{load_path} = $save;
		1216
		1217	return if $self->{deny_save};
		1218
		1219	if ($uniq) {
		1220	$self->save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
		1221	$self->save_objects ($uniq, cf::IO_UNIQUES);
		1222	} else {
		1223	$self->save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
		1224	}
		1225	}
		1226
		1227	sub swap_out {
		1228	my ($self) = @_;
		1229
		1230	return if $self->players;
		1231	return if $self->in_memory != cf::MAP_IN_MEMORY;
		1232	return if $self->{deny_save};
		1233
		1234	$self->save;
		1235	$self->clear;
		1236	$self->in_memory (cf::MAP_SWAPPED);
		1237	}
		1238
		1239	sub reset_at {
		1240	my ($self) = @_;
		1241
		1242	# TODO: safety, remove and allow resettable per-player maps
		1243	return 1e100 if $self->{path}{user_rel};
		1244	return 1e100 if $self->{deny_reset};
		1245
		1246	my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
		1247	my $to = $self->reset_timeout || $DEFAULT_RESET;
		1248	$to = $MAX_RESET if $to > $MAX_RESET;
		1249
		1250	$time + $to
		1251	}
		1252
		1253	sub should_reset {
		1254	my ($self) = @_;
		1255
		1256	$self->reset_at <= $cf::RUNTIME
		1257	}
		1258
		1259	sub unlink_save {
		1260	my ($self) = @_;
		1261
		1262	utf8::encode (my $save = $self->{path}->save_path);
		1263	aioreq_pri 3; IO::AIO::aio_unlink $save;
		1264	aioreq_pri 3; IO::AIO::aio_unlink "$save.pst";
		1265	}
		1266
		1267	sub rename {
		1268	my ($self, $new_path) = @_;
		1269
		1270	$self->unlink_save;
		1271
		1272	delete $cf::MAP{$self->path};
		1273	$self->{path} = new cf::path $new_path;
		1274	$self->path ($self->{path}->path);
		1275	$cf::MAP{$self->path} = $self;
		1276
		1277	$self->save;
		1278	}
		1279
		1280	sub reset {
		1281	my ($self) = @_;
		1282
		1283	return if $self->players;
		1284	return if $self->{path}{user_rel};#d#
		1285
		1286	warn "resetting map ", $self->path;#d#
		1287
		1288	delete $cf::MAP{$self->path};
		1289
		1290	$_->clear_links_to ($self) for values %cf::MAP;
		1291
		1292	$self->unlink_save;
		1293	$self->destroy;
		1294	}
		1295
		1296	sub customise_for {
		1297	my ($map, $ob) = @_;
		1298
		1299	if ($map->per_player) {
		1300	return cf::map::find_map "~" . $ob->name . "/" . $map->{path}{path};
		1301	}
		1302
		1303	$map
		1304	}
		1305
		1306	sub emergency_save {
		1307	local $cf::FREEZE = 1;
		1308
		1309	warn "enter emergency map save\n";
		1310
		1311	cf::sync_job {
		1312	warn "begin emergency map save\n";
		1313	$_->save for values %cf::MAP;
		1314	};
		1315
		1316	warn "end emergency map save\n";
		1317	}
		1318
		1319	package cf;
		1320
		1321	=back
		1322
		1323
		1324	=head3 cf::object::player
		1325
		1326	=over 4
		1327
		1328	=item $player_object->reply ($npc, $msg[, $flags])
		1329
		1330	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
		1331	can be C<undef>. Does the right thing when the player is currently in a
		1332	dialogue with the given NPC character.
		1333
		1334	=cut
		1335
		1336	# rough implementation of a future "reply" method that works
		1337	# with dialog boxes.
		1338	#TODO: the first argument must go, split into a $npc->reply_to ( method
		1339	sub cf::object::player::reply($$$;$) {
		1340	my ($self, $npc, $msg, $flags) = @_;
		1341
		1342	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
		1343
		1344	if ($self->{record_replies}) {
		1345	push @{ $self->{record_replies} }, [$npc, $msg, $flags];
		1346	} else {
		1347	$msg = $npc->name . " says: $msg" if $npc;
		1348	$self->message ($msg, $flags);
		1349	}
		1350	}
		1351
		1352	=item $player_object->may ("access")
		1353
		1354	Returns wether the given player is authorized to access resource "access"
		1355	(e.g. "command_wizcast").
		1356
		1357	=cut
		1358
		1359	sub cf::object::player::may {
		1360	my ($self, $access) = @_;
		1361
		1362	$self->flag (cf::FLAG_WIZ) ||
		1363	(ref $cf::CFG{"may_$access"}
		1364	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		1365	: $cf::CFG{"may_$access"})
		1366	}
		1367
		1368	sub cf::object::player::enter_link {
		1369	my ($self) = @_;
		1370
		1371	return if $self->map == $LINK_MAP;
		1372
		1373	$self->{_link_pos} = [$self->map->{path}, $self->x, $self->y]
		1374	if $self->map;
		1375
		1376	$self->enter_map ($LINK_MAP, 20, 20);
		1377	$self->deactivate_recursive;
		1378	}
		1379
		1380	sub cf::object::player::leave_link {
		1381	my ($self, $map, $x, $y) = @_;
		1382
		1383	my $link_pos = delete $self->{_link_pos};
		1384
		1385	unless ($map) {
		1386	$self->message ("The exit is closed", cf::NDI_UNIQUE | cf::NDI_RED);
		1387
		1388	# restore original map position
		1389	($map, $x, $y) = @{ $link_pos || [] };
		1390	$map = cf::map::find_map $map;
		1391
		1392	unless ($map) {
		1393	($map, $x, $y) = @$EMERGENCY_POSITION;
		1394	$map = cf::map::find_map $map
		1395	or die "FATAL: cannot load emergency map\n";
		1396	}
		1397	}
		1398
		1399	($x, $y) = (-1, -1)
		1400	unless (defined $x) && (defined $y);
		1401
		1402	# use -1 or undef as default coordinates, not 0, 0
		1403	($x, $y) = ($map->enter_x, $map->enter_y)
		1404	if $x <=0 && $y <= 0;
		1405
		1406	$map->load;
		1407
		1408	$self->activate_recursive;
		1409	$self->enter_map ($map, $x, $y);
		1410	}
		1411
		1412	=item $player_object->goto_map ($map, $x, $y)
		1413
		1414	=cut
		1415
		1416	sub cf::object::player::goto_map {
		1417	my ($self, $path, $x, $y) = @_;
		1418
		1419	$self->enter_link;
		1420
		1421	(Coro::async {
		1422	$path = new cf::path $path;
		1423
		1424	my $map = cf::map::find_map $path->as_string;
		1425	$map = $map->customise_for ($self) if $map;
		1426
		1427	warn "entering ", $map->path, " at ($x, $y)\n"
		1428	if $map;
		1429
		1430	$self->leave_link ($map, $x, $y);
		1431	})->prio (1);
		1432	}
		1433
		1434	=item $player_object->enter_exit ($exit_object)
		1435
		1436	=cut
		1437
		1438	sub parse_random_map_params {
		1439	my ($spec) = @_;
		1440
		1441	my $rmp = { # defaults
		1442	xsize => 10,
		1443	ysize => 10,
		1444	};
		1445
		1446	for (split /\n/, $spec) {
		1447	my ($k, $v) = split /\s+/, $_, 2;
		1448
		1449	$rmp->{lc $k} = $v if (length $k) && (length $v);
		1450	}
		1451
		1452	$rmp
		1453	}
		1454
		1455	sub prepare_random_map {
		1456	my ($exit) = @_;
		1457
		1458	# all this does is basically replace the /! path by
		1459	# a new random map path (?random/...) with a seed
		1460	# that depends on the exit object
		1461
		1462	my $rmp = parse_random_map_params $exit->msg;
		1463
		1464	if ($exit->map) {
		1465	$rmp->{region} = $exit->map->region_name;
		1466	$rmp->{origin_map} = $exit->map->path;
		1467	$rmp->{origin_x} = $exit->x;
		1468	$rmp->{origin_y} = $exit->y;
		1469	}
		1470
		1471	$rmp->{random_seed} ||= $exit->random_seed;
		1472
		1473	my $data = cf::to_json $rmp;
		1474	my $md5 = Digest::MD5::md5_hex $data;
		1475
		1476	if (my $fh = aio_open "$cf::RANDOM_MAPS/$md5.meta", O_WRONLY | O_CREAT, 0666) {
		1477	aio_write $fh, 0, (length $data), $data, 0;
		1478
		1479	$exit->slaying ("?random/$md5");
		1480	$exit->msg (undef);
		1481	}
		1482	}
		1483
		1484	sub cf::object::player::enter_exit {
		1485	my ($self, $exit) = @_;
		1486
		1487	return unless $self->type == cf::PLAYER;
		1488
		1489	$self->enter_link;
		1490
		1491	(Coro::async {
		1492	unless (eval {
		1493
		1494	prepare_random_map $exit
		1495	if $exit->slaying eq "/!";
		1496
		1497	my $path = new cf::path $exit->slaying, $exit->map && $exit->map->path;
		1498	$self->goto_map ($path, $exit->stats->hp, $exit->stats->sp);
		1499
		1500	1;
		1501	}) {
		1502	$self->message ("Something went wrong deep within the crossfire server. "
		1503	. "I'll try to bring you back to the map you were before. "
		1504	. "Please report this to the dungeon master",
		1505	cf::NDI_UNIQUE | cf::NDI_RED);
		1506
		1507	warn "ERROR in enter_exit: $@";
		1508	$self->leave_link;
		1509	}
		1510	})->prio (1);
		1511	}
		1512
		1513	=head3 cf::client
		1514
		1515	=over 4
		1516
		1517	=item $client->send_drawinfo ($text, $flags)
		1518
		1519	Sends a drawinfo packet to the client. Circumvents output buffering so
		1520	should not be used under normal circumstances.
		1521
		1522	=cut
		1523
		1524	sub cf::client::send_drawinfo {
		1525	my ($self, $text, $flags) = @_;
		1526
		1527	utf8::encode $text;
		1528	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		1529	}
		1530
		1531
		1532	=item $success = $client->query ($flags, "text", \&cb)
		1533
		1534	Queues a query to the client, calling the given callback with
		1535	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		1536	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		1537
		1538	Queries can fail, so check the return code. Or don't, as queries will become
		1539	reliable at some point in the future.
		1540
		1541	=cut
		1542
		1543	sub cf::client::query {
		1544	my ($self, $flags, $text, $cb) = @_;
		1545
		1546	return unless $self->state == ST_PLAYING
		1547	|| $self->state == ST_SETUP
		1548	|| $self->state == ST_CUSTOM;
		1549
		1550	$self->state (ST_CUSTOM);
		1551
		1552	utf8::encode $text;
		1553	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		1554
		1555	$self->send_packet ($self->{query_queue}[0][0])
		1556	if @{ $self->{query_queue} } == 1;
		1557	}
		1558
		1559	cf::client->attach (
		1560	on_reply => sub {
		1561	my ($ns, $msg) = @_;
		1562
		1563	# this weird shuffling is so that direct followup queries
		1564	# get handled first
		1565	my $queue = delete $ns->{query_queue};
		1566
		1567	(shift @$queue)->[1]->($msg);
		1568
		1569	push @{ $ns->{query_queue} }, @$queue;
		1570
		1571	if (@{ $ns->{query_queue} } == @$queue) {
		1572	if (@$queue) {
		1573	$ns->send_packet ($ns->{query_queue}[0][0]);
		1574	} else {
		1575	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		1576	}
		1577	}
		1578	},
		1579	);
		1580
		1581	=item $client->coro (\&cb)
		1582
		1583	Create a new coroutine, running the specified callback. The coroutine will
		1584	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1585	or loss of connection).
		1586
		1587	=cut
		1588
		1589	sub cf::client::coro {
		1590	my ($self, $cb) = @_;
		1591
		1592	my $coro; $coro = async {
198	eval {	1593	eval {
199	unload_extension $_ for @exts;	1594	$cb->();
200	delete $INC{"cf.pm"};
201
202	# don't, removes xs symbols, too
203	#Symbol::delete_package $pkg;
204
205	require cf;
206	};	1595	};
207	warn $@ if $@;	1596	warn $@ if $@;
208	$who->message ($@) if $@;
209	warn "reloaded\n";
210
211	$who->message ("reloaded");
212	} else {
213	$who->message ("Intruder Alert!");
214	}	1597	};
		1598
		1599	$coro->on_destroy (sub {
		1600	delete $self->{_coro}{$coro+0};
		1601	});
		1602
		1603	$self->{_coro}{$coro+0} = $coro;
		1604
		1605	$coro
		1606	}
		1607
		1608	cf::client->attach (
		1609	on_destroy => sub {
		1610	my ($ns) = @_;
		1611
		1612	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1613	},
		1614	);
		1615
		1616	=back
		1617
		1618
		1619	=head2 SAFE SCRIPTING
		1620
		1621	Functions that provide a safe environment to compile and execute
		1622	snippets of perl code without them endangering the safety of the server
		1623	itself. Looping constructs, I/O operators and other built-in functionality
		1624	is not available in the safe scripting environment, and the number of
		1625	functions and methods that can be called is greatly reduced.
		1626
		1627	=cut
		1628
		1629	our $safe = new Safe "safe";
		1630	our $safe_hole = new Safe::Hole;
		1631
		1632	$SIG{FPE} = 'IGNORE';
		1633
		1634	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
		1635
		1636	# here we export the classes and methods available to script code
		1637
		1638	=pod
		1639
		1640	The following fucntions and emthods are available within a safe environment:
		1641
		1642	cf::object contr pay_amount pay_player map
		1643	cf::object::player player
		1644	cf::player peaceful
		1645	cf::map trigger
		1646
		1647	=cut
		1648
		1649	for (
		1650	["cf::object" => qw(contr pay_amount pay_player map)],
		1651	["cf::object::player" => qw(player)],
		1652	["cf::player" => qw(peaceful)],
		1653	["cf::map" => qw(trigger)],
		1654	) {
		1655	no strict 'refs';
		1656	my ($pkg, @funs) = @$_;
		1657	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
		1658	for @funs;
		1659	}
		1660
		1661	=over 4
		1662
		1663	=item @retval = safe_eval $code, [var => value, ...]
		1664
		1665	Compiled and executes the given perl code snippet. additional var/value
		1666	pairs result in temporary local (my) scalar variables of the given name
		1667	that are available in the code snippet. Example:
		1668
		1669	my $five = safe_eval '$first + $second', first => 1, second => 4;
		1670
		1671	=cut
		1672
		1673	sub safe_eval($;@) {
		1674	my ($code, %vars) = @_;
		1675
		1676	my $qcode = $code;
		1677	$qcode =~ s/"/‟/g; # not allowed in #line filenames
		1678	$qcode =~ s/\n/\\n/g;
		1679
		1680	local $_;
		1681	local @safe::cf::_safe_eval_args = values %vars;
		1682
		1683	my $eval =
		1684	"do {\n"
		1685	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
		1686	. "#line 0 \"{$qcode}\"\n"
		1687	. $code
		1688	. "\n}"
		1689	;
		1690
		1691	sub_generation_inc;
		1692	my @res = wantarray ? $safe->reval ($eval) : scalar $safe->reval ($eval);
		1693	sub_generation_inc;
		1694
		1695	if ($@) {
		1696	warn "$@";
		1697	warn "while executing safe code '$code'\n";
		1698	warn "with arguments " . (join " ", %vars) . "\n";
		1699	}
		1700
		1701	wantarray ? @res : $res[0]
		1702	}
		1703
		1704	=item cf::register_script_function $function => $cb
		1705
		1706	Register a function that can be called from within map/npc scripts. The
		1707	function should be reasonably secure and should be put into a package name
		1708	like the extension.
		1709
		1710	Example: register a function that gets called whenever a map script calls
		1711	C<rent::overview>, as used by the C<rent> extension.
		1712
		1713	cf::register_script_function "rent::overview" => sub {
		1714	...
		1715	};
		1716
		1717	=cut
		1718
		1719	sub register_script_function {
		1720	my ($fun, $cb) = @_;
		1721
		1722	no strict 'refs';
		1723	*{"safe::$fun"} = $safe_hole->wrap ($cb);
		1724	}
		1725
		1726	=back
		1727
		1728	=cut
		1729
		1730	#############################################################################
		1731
		1732	=head2 EXTENSION DATABASE SUPPORT
		1733
		1734	Crossfire maintains a very simple database for extension use. It can
		1735	currently store anything that can be serialised using Storable, which
		1736	excludes objects.
		1737
		1738	The parameter C<$family> should best start with the name of the extension
		1739	using it, it should be unique.
		1740
		1741	=over 4
		1742
		1743	=item $hashref = cf::db_get $family
		1744
		1745	Return a hashref for use by the extension C<$family>, which can be
		1746	modified. After modifications, you have to call C<cf::db_dirty> or
		1747	C<cf::db_sync>.
		1748
		1749	=item $value = cf::db_get $family => $key
		1750
		1751	Returns a single value from the database
		1752
		1753	=item cf::db_put $family => $hashref
		1754
		1755	Stores the given family hashref into the database. Updates are delayed, if
		1756	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		1757
		1758	=item cf::db_put $family => $key => $value
		1759
		1760	Stores the given C<$value> in the family hash. Updates are delayed, if you
		1761	want the data to be synced to disk immediately, use C<cf::db_sync>.
		1762
		1763	=item cf::db_dirty
		1764
		1765	Marks the database as dirty, to be updated at a later time.
		1766
		1767	=item cf::db_sync
		1768
		1769	Immediately write the database to disk I<if it is dirty>.
		1770
		1771	=cut
		1772
		1773	our $DB;
		1774
		1775	{
		1776	my $path = cf::localdir . "/database.pst";
		1777
		1778	sub db_load() {
		1779	warn "loading database $path\n";#d# remove later
		1780	$DB = stat $path ? Storable::retrieve $path : { };
		1781	}
		1782
		1783	my $pid;
		1784
		1785	sub db_save() {
		1786	warn "saving database $path\n";#d# remove later
		1787	waitpid $pid, 0 if $pid;
		1788	if (0 == ($pid = fork)) {
		1789	$DB->{_meta}{version} = 1;
		1790	Storable::nstore $DB, "$path~";
		1791	rename "$path~", $path;
		1792	cf::_exit 0 if defined $pid;
		1793	}
		1794	}
		1795
		1796	my $dirty;
		1797
		1798	sub db_sync() {
		1799	db_save if $dirty;
		1800	undef $dirty;
		1801	}
		1802
		1803	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		1804	db_sync;
		1805	});
		1806
		1807	sub db_dirty() {
		1808	$dirty = 1;
		1809	$idle->start;
		1810	}
		1811
		1812	sub db_get($;$) {
		1813	@_ >= 2
		1814	? $DB->{$_[0]}{$_[1]}
		1815	: ($DB->{$_[0]} ||= { })
		1816	}
		1817
		1818	sub db_put($$;$) {
		1819	if (@_ >= 3) {
		1820	$DB->{$_[0]}{$_[1]} = $_[2];
		1821	} else {
		1822	$DB->{$_[0]} = $_[1];
		1823	}
		1824	db_dirty;
		1825	}
		1826
		1827	cf::global->attach (
		1828	prio => 10000,
		1829	on_cleanup => sub {
		1830	db_sync;
		1831	},
		1832	);
		1833	}
		1834
		1835	#############################################################################
		1836	# the server's main()
		1837
		1838	sub cfg_load {
		1839	open my $fh, "<:utf8", cf::confdir . "/config"
		1840	or return;
		1841
		1842	local $/;
		1843	*CFG = YAML::Syck::Load <$fh>;
		1844	}
		1845
		1846	sub main {
		1847	# we must not ever block the main coroutine
		1848	local $Coro::idle = sub {
		1849	Carp::cluck "FATAL: Coro::idle was called, major BUG\n";#d#
		1850	(Coro::unblock_sub {
		1851	Event::one_event;
		1852	})->();
		1853	};
		1854
		1855	cfg_load;
		1856	db_load;
		1857	load_extensions;
		1858	Event::loop;
		1859	}
		1860
		1861	#############################################################################
		1862	# initialisation
		1863
		1864	sub reload() {
		1865	# can/must only be called in main
		1866	if ($Coro::current != $Coro::main) {
		1867	warn "can only reload from main coroutine\n";
		1868	return;
		1869	}
		1870
		1871	warn "reloading...";
		1872
		1873	local $FREEZE = 1;
		1874	cf::emergency_save;
		1875
		1876	eval {
		1877	# if anything goes wrong in here, we should simply crash as we already saved
		1878
		1879	# cancel all watchers
		1880	for (Event::all_watchers) {
		1881	$_->cancel if $_->data & WF_AUTOCANCEL;
		1882	}
		1883
		1884	# cancel all extension coros
		1885	$_->cancel for values %EXT_CORO;
		1886	%EXT_CORO = ();
		1887
		1888	# unload all extensions
		1889	for (@exts) {
		1890	warn "unloading <$_>";
		1891	unload_extension $_;
		1892	}
		1893
		1894	# unload all modules loaded from $LIBDIR
		1895	while (my ($k, $v) = each %INC) {
		1896	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		1897
		1898	warn "removing <$k>";
		1899	delete $INC{$k};
		1900
		1901	$k =~ s/\.pm$//;
		1902	$k =~ s/\//::/g;
		1903
		1904	if (my $cb = $k->can ("unload_module")) {
		1905	$cb->();
		1906	}
		1907
		1908	Symbol::delete_package $k;
		1909	}
		1910
		1911	# sync database to disk
		1912	cf::db_sync;
		1913	IO::AIO::flush;
		1914
		1915	# get rid of safe::, as good as possible
		1916	Symbol::delete_package "safe::$_"
		1917	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		1918
		1919	# remove register_script_function callbacks
		1920	# TODO
		1921
		1922	# unload cf.pm "a bit"
		1923	delete $INC{"cf.pm"};
		1924
		1925	# don't, removes xs symbols, too,
		1926	# and global variables created in xs
		1927	#Symbol::delete_package __PACKAGE__;
		1928
		1929	# reload cf.pm
		1930	warn "reloading cf.pm";
		1931	require cf;
		1932	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		1933
		1934	# load config and database again
		1935	cf::cfg_load;
		1936	cf::db_load;
		1937
		1938	# load extensions
		1939	warn "load extensions";
		1940	cf::load_extensions;
		1941
		1942	# reattach attachments to objects
		1943	warn "reattach";
		1944	_global_reattach;
		1945	};
		1946
		1947	if ($@) {
		1948	warn $@;
		1949	warn "error while reloading, exiting.";
		1950	exit 1;
		1951	}
		1952
		1953	warn "reloaded successfully";
215	};	1954	};
216		1955
217	#############################################################################	1956	#############################################################################
218	# load/save/clean perl data associated with a map
219		1957
220	*on_mapclean = sub {	1958	unless ($LINK_MAP) {
221	my $map = shift->{map};	1959	$LINK_MAP = cf::map::new;
222		1960
223	my $path = $map->tmpname;	1961	$LINK_MAP->width (41);
224	defined $path or return;	1962	$LINK_MAP->height (41);
		1963	$LINK_MAP->alloc;
		1964	$LINK_MAP->path ("{link}");
		1965	$LINK_MAP->{path} = bless { path => "{link}" }, "cf::path";
		1966	$LINK_MAP->in_memory (MAP_IN_MEMORY);
225		1967
226	unlink "$path.cfperl";	1968	# dirty hack because... archetypes are not yet loaded
		1969	Event->timer (
		1970	after => 2,
		1971	cb => sub {
		1972	$_[0]->w->cancel;
		1973
		1974	# provide some exits "home"
		1975	my $exit = cf::object::new "exit";
		1976
		1977	$exit->slaying ($EMERGENCY_POSITION->[0]);
		1978	$exit->stats->hp ($EMERGENCY_POSITION->[1]);
		1979	$exit->stats->sp ($EMERGENCY_POSITION->[2]);
		1980
		1981	$LINK_MAP->insert ($exit->clone, 19, 19);
		1982	$LINK_MAP->insert ($exit->clone, 19, 20);
		1983	$LINK_MAP->insert ($exit->clone, 19, 21);
		1984	$LINK_MAP->insert ($exit->clone, 20, 19);
		1985	$LINK_MAP->insert ($exit->clone, 20, 21);
		1986	$LINK_MAP->insert ($exit->clone, 21, 19);
		1987	$LINK_MAP->insert ($exit->clone, 21, 20);
		1988	$LINK_MAP->insert ($exit->clone, 21, 21);
		1989
		1990	$exit->destroy;
		1991	});
		1992
		1993	$LINK_MAP->{deny_save} = 1;
		1994	$LINK_MAP->{deny_reset} = 1;
		1995
		1996	$cf::MAP{$LINK_MAP->path} = $LINK_MAP;
		1997	}
		1998
		1999	register "<global>", __PACKAGE__;
		2000
		2001	register_command "reload" => sub {
		2002	my ($who, $arg) = @_;
		2003
		2004	if ($who->flag (FLAG_WIZ)) {
		2005	$who->message ("start of reload.");
		2006	reload;
		2007	$who->message ("end of reload.");
		2008	}
227	};	2009	};
228		2010
229	*on_mapin =	2011	unshift @INC, $LIBDIR;
230	*on_mapload = sub {
231	my $map = shift->{map};
232		2012
233	my $path = $map->tmpname;	2013	$TICK_WATCHER = Event->timer (
234	$path = $map->path unless defined $path;	2014	reentrant => 0,
235		2015	prio => 0,
236	open my $fh, "<:raw", "$path.cfperl"	2016	at => $NEXT_TICK || $TICK,
237	or return; # no perl data	2017	data => WF_AUTOCANCEL,
238		2018	cb => sub {
239	my $data = Storable::thaw do { local $/; <$fh> };	2019	unless ($FREEZE) {
240		2020	cf::server_tick; # one server iteration
241	$data->{version} <= 1	2021	$RUNTIME += $TICK;
242	or return; # too new
243
244	$map->_set_obs ($data->{obs});
245	};
246
247	*on_mapout = sub {
248	my $map = shift->{map};
249
250	my $path = $map->tmpname;
251	$path = $map->path unless defined $path;
252
253	my $obs = $map->_get_obs;
254
255	if (defined $obs) {
256	open my $fh, ">:raw", "$path.cfperl"
257	or die "$path.cfperl: $!";
258
259	stat $path;
260
261	print $fh Storable::nfreeze {
262	size => (stat _)[7],
263	time => (stat _)[9],
264	version => 1,
265	obs => $obs,
266	};	2022	}
267		2023
268	chmod SAVE_MODE, "$path.cfperl"; # very racy, but cf-compatible *g*	2024	$NEXT_TICK += $TICK;
269	} else {	2025
270	unlink "$path.cfperl";	2026	# if we are delayed by four ticks or more, skip them all
		2027	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
		2028
		2029	$TICK_WATCHER->at ($NEXT_TICK);
		2030	$TICK_WATCHER->start;
271	}	2031	},
272	};	2032	);
273		2033
274	#############################################################################	2034	IO::AIO::max_poll_time $TICK * 0.2;
275	# load/save perl data associated with player->ob objects
276		2035
277	*on_player_load = sub {	2036	Event->io (
278	my ($event) = @_;	2037	fd => IO::AIO::poll_fileno,
279	my $path = $event->{message};	2038	poll => 'r',
280	my $ob = $event->{who};	2039	prio => 5,
		2040	data => WF_AUTOCANCEL,
		2041	cb => \&IO::AIO::poll_cb,
		2042	);
281		2043
282	if (open my $fh, "<:raw", "$path.cfperl") {	2044	Event->timer (
283		2045	data => WF_AUTOCANCEL,
284	#d##TODO#remove	2046	after => 0,
285		2047	interval => 10,
286	my $data = Storable::thaw do { local $/; <$fh> };	2048	cb => sub {
287		2049	(Coro::unblock_sub {
288	$data->{version} <= 1	2050	write_runtime
289	or return; # too new	2051	or warn "ERROR: unable to write runtime file: $!";
290		2052	})->();
291	%$ob = %{$data->{ob}};
292	return;
293	}	2053	},
294		2054	);
295	for my $o ($ob, $ob->inv) {
296	if (my $value = $o->get_ob_key_value ("_perl_data")) {
297	$o->set_ob_key_value ("_perl_data");
298
299	%$o = %{ Storable::thaw pack "H*", $value };
300	}
301	}
302	};
303
304	*on_player_save = sub {
305	my ($event) = @_;
306	my $path = $event->{message};
307	my $ob = $event->{who};
308
309	$_->set_ob_key_value (_perl_data => unpack "H*", Storable::nfreeze $_)
310	for grep %$_, $ob, $ob->inv;
311
312	unlink "$path.cfperl";#d##TODO#remove
313	};
314
315	register "<global>", __PACKAGE__;
316
317	load_extensions;
318		2055
319	1	2056	1
320		2057

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