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Comparing cf.schmorp.de/server/lib/cf.pm (file contents):
Revision 1.35 by root, Thu Aug 24 13:35:48 2006 UTC vs.
Revision 1.167 by root, Sat Jan 13 23:32:43 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;
6	use Opcode;	9	use Opcode;
7	use Safe;	10	use Safe;
8	use Safe::Hole;	11	use Safe::Hole;
9		12
		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;
		19
		20	use Data::Dumper;
		21	use Digest::MD5;
		22	use Fcntl;
		23	use IO::AIO 2.32 ();
		24	use YAML::Syck ();
10	use Time::HiRes;	25	use Time::HiRes;
11	use Event;	26
12	$Event::Eval = 1; # no idea why this is required, but it is	27	use Event; $Event::Eval = 1; # no idea why this is required, but it is
13		28
14	use strict;	29	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
15		30
16	our %COMMAND;	31	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		32	$YAML::Syck::ImplicitUnicode = 1;
		33
		34	$Coro::main->prio (Coro::PRIO_MAX); # run main coroutine ("the server") with very high priority
		35
		36	our %COMMAND = ();
		37	our %COMMAND_TIME = ();
		38
		39	our @EXTS = (); # list of extension package names
		40	our %EXTCMD = ();
		41	our %EXT_CORO = (); # coroutines bound to extensions
		42	our %EXT_MAP = (); # pluggable maps
		43
17	our @EVENT;	44	our @EVENT;
18	our %PROP_TYPE;	45	our $LIBDIR = datadir . "/ext";
19	our %PROP_IDX;
20	our $LIBDIR = maps_directory "perl";
21		46
22	our $TICK = MAX_TIME * 1e-6;	47	our $TICK = MAX_TIME * 1e-6;
23	our $TICK_WATCHER;	48	our $TICK_WATCHER;
24	our $NEXT_TICK;	49	our $NEXT_TICK;
		50	our $NOW;
		51
		52	our %CFG;
		53
		54	our $UPTIME; $UPTIME ||= time;
		55	our $RUNTIME;
		56
		57	our %PLAYER; # all users
		58	our %MAP; # all maps
		59	our $LINK_MAP; # the special {link} map, which is always available
		60	our $RANDOM_MAPS = cf::localdir . "/random";
		61
		62	our $WAIT_FOR_TICK; $WAIT_FOR_TICK ||= new Coro::Signal;
		63	our $WAIT_FOR_TICK_ONE; $WAIT_FOR_TICK_ONE ||= new Coro::Signal;
		64
		65	# used to convert map paths into valid unix filenames by replacing / by ∕
		66	our $PATH_SEP = "∕"; # U+2215, chosen purely for visual reasons
		67
		68	binmode STDOUT;
		69	binmode STDERR;
		70
		71	# read virtual server time, if available
		72	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		73	open my $fh, "<", cf::localdir . "/runtime"
		74	or die "unable to read runtime file: $!";
		75	$RUNTIME = <$fh> + 0.;
		76	}
		77
		78	mkdir cf::localdir;
		79	mkdir cf::localdir . "/" . cf::playerdir;
		80	mkdir cf::localdir . "/" . cf::tmpdir;
		81	mkdir cf::localdir . "/" . cf::uniquedir;
		82	mkdir $RANDOM_MAPS;
		83
		84	our $EMERGENCY_POSITION;
		85
		86	#############################################################################
		87
		88	=head2 GLOBAL VARIABLES
		89
		90	=over 4
		91
		92	=item $cf::UPTIME
		93
		94	The timestamp of the server start (so not actually an uptime).
		95
		96	=item $cf::RUNTIME
		97
		98	The time this server has run, starts at 0 and is increased by $cf::TICK on
		99	every server tick.
		100
		101	=item $cf::LIBDIR
		102
		103	The perl library directory, where extensions and cf-specific modules can
		104	be found. It will be added to C<@INC> automatically.
		105
		106	=item $cf::NOW
		107
		108	The time of the last (current) server tick.
		109
		110	=item $cf::TICK
		111
		112	The interval between server ticks, in seconds.
		113
		114	=item %cf::CFG
		115
		116	Configuration for the server, loaded from C</etc/crossfire/config>, or
		117	from wherever your confdir points to.
		118
		119	=item $cf::WAIT_FOR_TICK, $cf::WAIT_FOR_TICK_ONE
		120
		121	These are Coro::Signal objects that are C<< ->broadcast >> (WAIT_FOR_TICK)
		122	or C<< ->send >> (WAIT_FOR_TICK_ONE) on after normal server tick
		123	processing has been done. Call C<< ->wait >> on them to maximise the
		124	window of cpu time available, or simply to synchronise to the server tick.
		125
		126	=back
		127
		128	=cut
25		129
26	BEGIN {	130	BEGIN {
27	@EVENT = map lc, @EVENT;
28
29	*CORE::GLOBAL::warn = sub {	131	*CORE::GLOBAL::warn = sub {
30	my $msg = join "", @_;	132	my $msg = join "", @_;
		133	utf8::encode $msg;
		134
31	$msg .= "\n"	135	$msg .= "\n"
32	unless $msg =~ /\n$/;	136	unless $msg =~ /\n$/;
33		137
34	print STDERR "cfperl: $msg";
35	LOG llevError, "cfperl: $msg";	138	LOG llevError, $msg;
36	};	139	};
37	}	140	}
38		141
39	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	142	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
		143	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
		144	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		145	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		146	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
		147	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
40		148
41	# generate property mutators	149	# we bless all objects into (empty) derived classes to force a method lookup
42	sub prop_gen {	150	# within the Safe compartment.
43	my ($prefix, $class) = @_;	151	for my $pkg (qw(
44		152	cf::global cf::attachable
		153	cf::object cf::object::player
		154	cf::client cf::player
		155	cf::arch cf::living
		156	cf::map cf::party cf::region
		157	)) {
45	no strict 'refs';	158	no strict 'refs';
46
47	for my $prop (keys %PROP_TYPE) {
48	$prop =~ /^\Q$prefix\E_(.*$)/ or next;
49	my $sub = lc $1;
50
51	my $type = $PROP_TYPE{$prop};
52	my $idx = $PROP_IDX {$prop};
53
54	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
55	$_[0]->get_property ($type, $idx)
56	};
57
58	*{"$class\::set_$sub"} = sub {
59	$_[0]->set_property ($type, $idx, $_[1]);
60	} unless $ignore_set{$prop};
61	}
62	}
63
64	# auto-generate most of the API
65
66	prop_gen OBJECT_PROP => "cf::object";
67	# CFAPI_OBJECT_ANIMATION?
68	prop_gen PLAYER_PROP => "cf::object::player";
69
70	prop_gen MAP_PROP => "cf::map";
71	prop_gen ARCH_PROP => "cf::arch";
72
73	# guessed hierarchies
74
75	@ext::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
76	@ext::cf::object::map::ISA = @cf::object::map::ISA = 'cf::object';
77
78	# we bless all objects into derived classes to force a method lookup
79	# within the Safe compartment.
80	for my $pkg (qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region cf::arch)) {
81	no strict 'refs';
82	@{"ext::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	159	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
83	}	160	}
84		161
85	$Event::DIED = sub {	162	$Event::DIED = sub {
86	warn "error in event callback: @_";	163	warn "error in event callback: @_";
87	};	164	};
88		165
89	my %ext_pkg;	166	=head2 UTILITY FUNCTIONS
90	my @exts;
91	my @hook;
92	my %command;
93	my %extcmd;
94		167
95	sub inject_event {	168	=over 4
96	my $extension = shift;	169
		170	=item dumpval $ref
		171
		172	=cut
		173
		174	sub dumpval {
		175	eval {
		176	local $SIG{__DIE__};
		177	my $d;
		178	if (1) {
		179	$d = new Data::Dumper([$_[0]], ["*var"]);
		180	$d->Terse(1);
		181	$d->Indent(2);
		182	$d->Quotekeys(0);
		183	$d->Useqq(1);
		184	#$d->Bless(...);
		185	$d->Seen($_[1]) if @_ > 1;
		186	$d = $d->Dump();
		187	}
		188	$d =~ s/([\x00-\x07\x09\x0b\x0c\x0e-\x1f])/sprintf "\\x%02x", ord($1)/ge;
		189	$d
		190	} || "[unable to dump $_[0]: '$@']";
		191	}
		192
		193	use JSON::Syck (); # TODO# replace by JSON::PC once working
		194
		195	=item $ref = cf::from_json $json
		196
		197	Converts a JSON string into the corresponding perl data structure.
		198
		199	=cut
		200
		201	sub from_json($) {
		202	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
		203	JSON::Syck::Load $_[0]
		204	}
		205
		206	=item $json = cf::to_json $ref
		207
		208	Converts a perl data structure into its JSON representation.
		209
		210	=cut
		211
		212	sub to_json($) {
		213	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
		214	JSON::Syck::Dump $_[0]
		215	}
		216
		217	=item cf::lock_wait $string
		218
		219	Wait until the given lock is available. See cf::lock_acquire.
		220
		221	=item my $lock = cf::lock_acquire $string
		222
		223	Wait until the given lock is available and then acquires it and returns
		224	a Coro::guard object. If the guard object gets destroyed (goes out of scope,
		225	for example when the coroutine gets canceled), the lock is automatically
		226	returned.
		227
		228	Lock names should begin with a unique identifier (for example, cf::map::find
		229	uses map_find and cf::map::load uses map_load).
		230
		231	=cut
		232
		233	our %LOCK;
		234
		235	sub lock_wait($) {
		236	my ($key) = @_;
		237
		238	# wait for lock, if any
		239	while ($LOCK{$key}) {
		240	push @{ $LOCK{$key} }, $Coro::current;
		241	Coro::schedule;
		242	}
		243	}
		244
		245	sub lock_acquire($) {
		246	my ($key) = @_;
		247
		248	# wait, to be sure we are not locked
		249	lock_wait $key;
		250
		251	$LOCK{$key} = [];
		252
		253	Coro::guard {
		254	# wake up all waiters, to be on the safe side
		255	$_->ready for @{ delete $LOCK{$key} };
		256	}
		257	}
		258
		259	sub freeze_mainloop {
		260	return unless $TICK_WATCHER->is_active;
		261
		262	my $guard = Coro::guard { $TICK_WATCHER->start };
		263	$TICK_WATCHER->stop;
		264	$guard
		265	}
		266
		267	=item cf::async { BLOCK }
		268
		269	Currently the same as Coro::async_pool, meaning you cannot use
		270	C<on_destroy>, C<join> or other gimmicks on these coroutines. The only
		271	thing you are allowed to do is call C<prio> on it.
		272
		273	=cut
		274
		275	BEGIN { *async = \&Coro::async_pool }
		276
		277	=item cf::sync_job { BLOCK }
		278
		279	The design of crossfire+ requires that the main coro ($Coro::main) is
		280	always able to handle events or runnable, as crossfire+ is only partly
		281	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		282
		283	If it must be done, put the blocking parts into C<sync_job>. This will run
		284	the given BLOCK in another coroutine while waiting for the result. The
		285	server will be frozen during this time, so the block should either finish
		286	fast or be very important.
		287
		288	=cut
		289
		290	sub sync_job(&) {
		291	my ($job) = @_;
		292
		293	if ($Coro::current == $Coro::main) {
		294	# this is the main coro, too bad, we have to block
		295	# till the operation succeeds, freezing the server :/
		296
		297	# TODO: use suspend/resume instead
		298	# (but this is cancel-safe)
		299	my $freeze_guard = freeze_mainloop;
		300
		301	my $busy = 1;
		302	my @res;
		303
		304	(async {
		305	@res = eval { $job->() };
		306	warn $@ if $@;
		307	undef $busy;
		308	})->prio (Coro::PRIO_MAX);
		309
		310	while ($busy) {
		311	Coro::cede or Event::one_event;
		312	}
		313
		314	wantarray ? @res : $res[0]
		315	} else {
		316	# we are in another coroutine, how wonderful, everything just works
		317
		318	$job->()
		319	}
		320	}
		321
		322	=item $coro = cf::async_ext { BLOCK }
		323
		324	Like async, but this coro is automatically being canceled when the
		325	extension calling this is being unloaded.
		326
		327	=cut
		328
		329	sub async_ext(&) {
97	my $event_code = shift;	330	my $cb = shift;
98		331
99	my $cb = $hook[$event_code]{$extension}	332	my $coro = &Coro::async ($cb);
		333
		334	$coro->on_destroy (sub {
		335	delete $EXT_CORO{$coro+0};
		336	});
		337	$EXT_CORO{$coro+0} = $coro;
		338
		339	$coro
		340	}
		341
		342	sub write_runtime {
		343	return unless $TICK_WATCHER->is_active;
		344
		345	my $runtime = cf::localdir . "/runtime";
		346
		347	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
100	or return;	348	or return;
101		349
102	&$cb	350	my $value = $cf::RUNTIME + 1 + 10; # 10 is the runtime save interval, for a monotonic clock
103	}	351	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		352	and return;
104		353
105	sub inject_global_event {	354	aio_fsync $fh
		355	and return;
		356
		357	close $fh
		358	or return;
		359
		360	aio_rename "$runtime~", $runtime
		361	and return;
		362
		363	1
		364	}
		365
		366	=back
		367
		368	=cut
		369
		370	#############################################################################
		371
		372	=head2 ATTACHABLE OBJECTS
		373
		374	Many objects in crossfire are so-called attachable objects. That means you can
		375	attach callbacks/event handlers (a collection of which is called an "attachment")
		376	to it. All such attachable objects support the following methods.
		377
		378	In the following description, CLASS can be any of C<global>, C<object>
		379	C<player>, C<client> or C<map> (i.e. the attachable objects in
		380	crossfire+).
		381
		382	=over 4
		383
		384	=item $attachable->attach ($attachment, key => $value...)
		385
		386	=item $attachable->detach ($attachment)
		387
		388	Attach/detach a pre-registered attachment to a specific object and give it
		389	the specified key/value pairs as arguments.
		390
		391	Example, attach a minesweeper attachment to the given object, making it a
		392	10x10 minesweeper game:
		393
		394	$obj->attach (minesweeper => width => 10, height => 10);
		395
		396	=item $bool = $attachable->attached ($name)
		397
		398	Checks wether the named attachment is currently attached to the object.
		399
		400	=item cf::CLASS->attach ...
		401
		402	=item cf::CLASS->detach ...
		403
		404	Define an anonymous attachment and attach it to all objects of the given
		405	CLASS. See the next function for an explanation of its arguments.
		406
		407	You can attach to global events by using the C<cf::global> class.
		408
		409	Example, log all player logins:
		410
		411	cf::player->attach (
		412	on_login => sub {
		413	my ($pl) = @_;
		414	...
		415	},
		416	);
		417
		418	Example, attach to the jeweler skill:
		419
		420	cf::object->attach (
		421	type => cf::SKILL,
		422	subtype => cf::SK_JEWELER,
		423	on_use_skill => sub {
		424	my ($sk, $ob, $part, $dir, $msg) = @_;
		425	...
		426	},
		427	);
		428
		429	=item cf::CLASS::attachment $name, ...
		430
		431	Register an attachment by C<$name> through which attachable objects of the
		432	given CLASS can refer to this attachment.
		433
		434	Some classes such as crossfire maps and objects can specify attachments
		435	that are attached at load/instantiate time, thus the need for a name.
		436
		437	These calls expect any number of the following handler/hook descriptions:
		438
		439	=over 4
		440
		441	=item prio => $number
		442
		443	Set the priority for all following handlers/hooks (unless overwritten
		444	by another C<prio> setting). Lower priority handlers get executed
		445	earlier. The default priority is C<0>, and many built-in handlers are
		446	registered at priority C<-1000>, so lower priorities should not be used
		447	unless you know what you are doing.
		448
		449	=item type => $type
		450
		451	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		452	given type of objects only (the additional parameter C<subtype> can be
		453	used to further limit to the given subtype).
		454
		455	=item on_I<event> => \&cb
		456
		457	Call the given code reference whenever the named event happens (event is
		458	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
		459	handlers are recognised generally depends on the type of object these
		460	handlers attach to).
		461
		462	See F<include/eventinc.h> for the full list of events supported, and their
		463	class.
		464
		465	=item package => package::
		466
		467	Look for sub functions of the name C<< on_I<event> >> in the given
		468	package and register them. Only handlers for eevents supported by the
		469	object/class are recognised.
		470
		471	=back
		472
		473	Example, define an attachment called "sockpuppet" that calls the given
		474	event handler when a monster attacks:
		475
		476	cf::object::attachment sockpuppet =>
		477	on_skill_attack => sub {
		478	my ($self, $victim) = @_;
		479	...
		480	}
		481	}
		482
		483	=item $attachable->valid
		484
		485	Just because you have a perl object does not mean that the corresponding
		486	C-level object still exists. If you try to access an object that has no
		487	valid C counterpart anymore you get an exception at runtime. This method
		488	can be used to test for existence of the C object part without causing an
		489	exception.
		490
		491	=cut
		492
		493	# the following variables are defined in .xs and must not be re-created
		494	our @CB_GLOBAL = (); # registry for all global events
		495	our @CB_ATTACHABLE = (); # registry for all attachables
		496	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		497	our @CB_PLAYER = ();
		498	our @CB_CLIENT = ();
		499	our @CB_TYPE = (); # registry for type (cf-object class) based events
		500	our @CB_MAP = ();
		501
		502	my %attachment;
		503
		504	sub _attach_cb($$$$) {
		505	my ($registry, $event, $prio, $cb) = @_;
		506
		507	use sort 'stable';
		508
		509	$cb = [$prio, $cb];
		510
		511	@{$registry->[$event]} = sort
		512	{ $a->[0] cmp $b->[0] }
		513	@{$registry->[$event] || []}, $cb;
		514	}
		515
		516	# hack
		517	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		518
		519	# attach handles attaching event callbacks
		520	# the only thing the caller has to do is pass the correct
		521	# registry (== where the callback attaches to).
		522	sub _attach {
		523	my ($registry, $klass, @arg) = @_;
		524
		525	my $object_type;
		526	my $prio = 0;
		527	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		528
		529	#TODO: get rid of this hack
		530	if ($attachable_klass{$klass}) {
		531	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		532	}
		533
		534	while (@arg) {
		535	my $type = shift @arg;
		536
		537	if ($type eq "prio") {
		538	$prio = shift @arg;
		539
		540	} elsif ($type eq "type") {
		541	$object_type = shift @arg;
		542	$registry = $CB_TYPE[$object_type] ||= [];
		543
		544	} elsif ($type eq "subtype") {
		545	defined $object_type or Carp::croak "subtype specified without type";
		546	my $object_subtype = shift @arg;
		547	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		548
		549	} elsif ($type eq "package") {
		550	my $pkg = shift @arg;
		551
		552	while (my ($name, $id) = each %cb_id) {
		553	if (my $cb = $pkg->can ($name)) {
		554	_attach_cb $registry, $id, $prio, $cb;
		555	}
		556	}
		557
		558	} elsif (exists $cb_id{$type}) {
		559	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		560
		561	} elsif (ref $type) {
		562	warn "attaching objects not supported, ignoring.\n";
		563
		564	} else {
		565	shift @arg;
		566	warn "attach argument '$type' not supported, ignoring.\n";
		567	}
		568	}
		569	}
		570
		571	sub _object_attach {
		572	my ($obj, $name, %arg) = @_;
		573
		574	return if exists $obj->{_attachment}{$name};
		575
		576	if (my $attach = $attachment{$name}) {
		577	my $registry = $obj->registry;
		578
		579	for (@$attach) {
		580	my ($klass, @attach) = @$_;
		581	_attach $registry, $klass, @attach;
		582	}
		583
		584	$obj->{$name} = \%arg;
		585	} else {
		586	warn "object uses attachment '$name' that is not available, postponing.\n";
		587	}
		588
		589	$obj->{_attachment}{$name} = undef;
		590	}
		591
		592	sub cf::attachable::attach {
		593	if (ref $_[0]) {
		594	_object_attach @_;
		595	} else {
		596	_attach shift->_attach_registry, @_;
		597	}
		598	};
		599
		600	# all those should be optimised
		601	sub cf::attachable::detach {
		602	my ($obj, $name) = @_;
		603
		604	if (ref $obj) {
		605	delete $obj->{_attachment}{$name};
		606	reattach ($obj);
		607	} else {
		608	Carp::croak "cannot, currently, detach class attachments";
		609	}
		610	};
		611
		612	sub cf::attachable::attached {
		613	my ($obj, $name) = @_;
		614
		615	exists $obj->{_attachment}{$name}
		616	}
		617
		618	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		619	eval "#line " . __LINE__ . " 'cf.pm'
		620	sub cf::\L$klass\E::_attach_registry {
		621	(\\\@CB_$klass, KLASS_$klass)
		622	}
		623
		624	sub cf::\L$klass\E::attachment {
		625	my \$name = shift;
		626
		627	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		628	}
		629	";
		630	die if $@;
		631	}
		632
		633	our $override;
		634	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		635
		636	sub override {
		637	$override = 1;
		638	@invoke_results = ();
		639	}
		640
		641	sub do_invoke {
106	my $event = shift;	642	my $event = shift;
		643	my $callbacks = shift;
107		644
108	my $cb = $hook[$event]	645	@invoke_results = ();
		646
		647	local $override;
		648
		649	for (@$callbacks) {
		650	eval { &{$_->[1]} };
		651
		652	if ($@) {
		653	warn "$@";
		654	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		655	override;
		656	}
		657
		658	return 1 if $override;
		659	}
		660
		661	0
		662	}
		663
		664	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		665
		666	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		667
		668	Generate an object-specific event with the given arguments.
		669
		670	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		671	removed in future versions), and there is no public API to access override
		672	results (if you must, access C<@cf::invoke_results> directly).
		673
		674	=back
		675
		676	=cut
		677
		678	#############################################################################
		679	# object support
		680
		681	sub reattach {
		682	# basically do the same as instantiate, without calling instantiate
		683	my ($obj) = @_;
		684
		685	my $registry = $obj->registry;
		686
		687	@$registry = ();
		688
		689	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		690
		691	for my $name (keys %{ $obj->{_attachment} || {} }) {
		692	if (my $attach = $attachment{$name}) {
		693	for (@$attach) {
		694	my ($klass, @attach) = @$_;
		695	_attach $registry, $klass, @attach;
		696	}
		697	} else {
		698	warn "object uses attachment '$name' that is not available, postponing.\n";
		699	}
		700	}
		701	}
		702
		703	cf::attachable->attach (
		704	prio => -1000000,
		705	on_instantiate => sub {
		706	my ($obj, $data) = @_;
		707
		708	$data = from_json $data;
		709
		710	for (@$data) {
		711	my ($name, $args) = @$_;
		712
		713	$obj->attach ($name, %{$args || {} });
		714	}
		715	},
		716	on_reattach => \&reattach,
		717	on_clone => sub {
		718	my ($src, $dst) = @_;
		719
		720	@{$dst->registry} = @{$src->registry};
		721
		722	%$dst = %$src;
		723
		724	%{$dst->{_attachment}} = %{$src->{_attachment}}
		725	if exists $src->{_attachment};
		726	},
		727	);
		728
		729	sub object_freezer_save {
		730	my ($filename, $rdata, $objs) = @_;
		731
		732	sync_job {
		733	if (length $$rdata) {
		734	warn sprintf "saving %s (%d,%d)\n",
		735	$filename, length $$rdata, scalar @$objs;
		736
		737	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		738	chmod SAVE_MODE, $fh;
		739	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		740	aio_fsync $fh;
		741	close $fh;
		742
		743	if (@$objs) {
		744	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		745	chmod SAVE_MODE, $fh;
		746	my $data = Storable::nfreeze { version => 1, objs => $objs };
		747	aio_write $fh, 0, (length $data), $data, 0;
		748	aio_fsync $fh;
		749	close $fh;
		750	aio_rename "$filename.pst~", "$filename.pst";
		751	}
		752	} else {
		753	aio_unlink "$filename.pst";
		754	}
		755
		756	aio_rename "$filename~", $filename;
		757	} else {
		758	warn "FATAL: $filename~: $!\n";
		759	}
		760	} else {
		761	aio_unlink $filename;
		762	aio_unlink "$filename.pst";
		763	}
		764	}
		765	}
		766
		767	sub object_freezer_as_string {
		768	my ($rdata, $objs) = @_;
		769
		770	use Data::Dumper;
		771
		772	$$rdata . Dumper $objs
		773	}
		774
		775	sub object_thawer_load {
		776	my ($filename) = @_;
		777
		778	my ($data, $av);
		779
		780	(aio_load $filename, $data) >= 0
109	or return;	781	or return;
110		782
111	List::Util::max map &$_, values %$cb	783	unless (aio_stat "$filename.pst") {
112	}	784	(aio_load "$filename.pst", $av) >= 0
113		785	or return;
114	sub inject_command {	786	$av = eval { (Storable::thaw $av)->{objs} };
115	my ($name, $obj, $params) = @_;
116
117	for my $cmd (@{ $command{$name} }) {
118	$cmd->[1]->($obj, $params);
119	}	787	}
120		788
121	-1	789	warn sprintf "loading %s (%d)\n",
		790	$filename, length $data, scalar @{$av || []};#d#
		791	return ($data, $av);
122	}	792	}
		793
		794	#############################################################################
		795	# command handling &c
		796
		797	=item cf::register_command $name => \&callback($ob,$args);
		798
		799	Register a callback for execution when the client sends the user command
		800	$name.
		801
		802	=cut
123		803
124	sub register_command {	804	sub register_command {
125	my ($name, $time, $cb) = @_;	805	my ($name, $cb) = @_;
126		806
127	my $caller = caller;	807	my $caller = caller;
128	#warn "registering command '$name/$time' to '$caller'";	808	#warn "registering command '$name/$time' to '$caller'";
129		809
130	push @{ $command{$name} }, [$time, $cb, $caller];	810	push @{ $COMMAND{$name} }, [$caller, $cb];
131	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
132	}	811	}
		812
		813	=item cf::register_extcmd $name => \&callback($pl,$packet);
		814
		815	Register a callbackf ro execution when the client sends an extcmd packet.
		816
		817	If the callback returns something, it is sent back as if reply was being
		818	called.
		819
		820	=cut
133		821
134	sub register_extcmd {	822	sub register_extcmd {
135	my ($name, $cb) = @_;	823	my ($name, $cb) = @_;
136		824
137	my $caller = caller;	825	$EXTCMD{$name} = $cb;
138	#warn "registering extcmd '$name' to '$caller'";
139
140	$extcmd{$name} = [$cb, $caller];
141	}	826	}
142		827
143	sub register {	828	cf::player->attach (
144	my ($base, $pkg) = @_;	829	on_command => sub {
		830	my ($pl, $name, $params) = @_;
145		831
146	for my $idx (0 .. $#EVENT) {	832	my $cb = $COMMAND{$name}
147	if (my $ref = $pkg->can ("on_$EVENT[$idx]")) {	833	or return;
148	#warn "registering $EVENT[$idx] hook to '$pkg'\n";	834
149	$hook[$idx]{$base} = $ref;	835	for my $cmd (@$cb) {
		836	$cmd->[1]->($pl->ob, $params);
150	}	837	}
		838
		839	cf::override;
151	}	840	},
152	}	841	on_extcmd => sub {
		842	my ($pl, $buf) = @_;
		843
		844	my $msg = eval { from_json $buf };
		845
		846	if (ref $msg) {
		847	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		848	if (my %reply = $cb->($pl, $msg)) {
		849	$pl->ext_reply ($msg->{msgid}, %reply);
		850	}
		851	}
		852	} else {
		853	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		854	}
		855
		856	cf::override;
		857	},
		858	);
153		859
154	sub load_extension {	860	sub load_extension {
155	my ($path) = @_;	861	my ($path) = @_;
156		862
157	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	863	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
158	my $base = $1;	864	my $base = $1;
159	my $pkg = $1;	865	my $pkg = $1;
160	$pkg =~ s/[^[:word:]]/_/g;	866	$pkg =~ s/[^[:word:]]/_/g;
161	$pkg = "cf::ext::$pkg";	867	$pkg = "ext::$pkg";
162		868
163	warn "loading '$path' into '$pkg'\n";	869	warn "... loading '$path' into '$pkg'\n";
164		870
165	open my $fh, "<:utf8", $path	871	open my $fh, "<:utf8", $path
166	or die "$path: $!";	872	or die "$path: $!";
167		873
168	my $source =	874	my $source =
169	"package $pkg; use strict; use utf8;\n"	875	"package $pkg; use strict; use utf8;\n"
170	. "#line 1 \"$path\"\n{\n"	876	. "#line 1 \"$path\"\n{\n"
171	. (do { local $/; <$fh> })	877	. (do { local $/; <$fh> })
172	. "\n};\n1";	878	. "\n};\n1";
173		879
174	eval $source	880	unless (eval $source) {
175	or die "$path: $@";	881	my $msg = $@ ? "$path: $@\n"
		882	: "extension disabled.\n";
		883	if ($source =~ /^#!.*perl.*#.*MANDATORY/m) { # ugly match
		884	warn $@;
		885	warn "mandatory extension failed to load, exiting.\n";
		886	exit 1;
		887	}
		888	die $@;
		889	}
176		890
177	push @exts, $pkg;	891	push @EXTS, $pkg;
178	$ext_pkg{$base} = $pkg;
179
180	# no strict 'refs';
181	# @{"$pkg\::ISA"} = ext::;
182
183	register $base, $pkg;
184	}
185
186	sub unload_extension {
187	my ($pkg) = @_;
188
189	warn "removing extension $pkg\n";
190
191	# remove hooks
192	for my $idx (0 .. $#EVENT) {
193	delete $hook[$idx]{$pkg};
194	}
195
196	# remove commands
197	for my $name (keys %command) {
198	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };
199
200	if (@cb) {
201	$command{$name} = \@cb;
202	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
203	} else {
204	delete $command{$name};
205	delete $COMMAND{"$name\000"};
206	}
207	}
208
209	# remove extcmds
210	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {
211	delete $extcmd{$name};
212	}
213
214	if (my $cb = $pkg->can ("on_unload")) {
215	eval {
216	$cb->($pkg);
217	1
218	} or warn "$pkg unloaded, but with errors: $@";
219	}
220
221	Symbol::delete_package $pkg;
222	}	892	}
223		893
224	sub load_extensions {	894	sub load_extensions {
225	my $LIBDIR = maps_directory "perl";
226
227	for my $ext (<$LIBDIR/*.ext>) {	895	for my $ext (<$LIBDIR/*.ext>) {
228	next unless -r $ext;	896	next unless -r $ext;
229	eval {	897	eval {
230	load_extension $ext;	898	load_extension $ext;
231	1	899	1
232	} or warn "$ext not loaded: $@";	900	} or warn "$ext not loaded: $@";
233	}	901	}
234	}	902	}
235		903
236	register_command "perl-reload", 0, sub {	904	#############################################################################
		905
		906	=head2 CORE EXTENSIONS
		907
		908	Functions and methods that extend core crossfire objects.
		909
		910	=cut
		911
		912	package cf::player;
		913
		914	use Coro::AIO;
		915
		916	=head3 cf::player
		917
		918	=over 4
		919
		920	=item cf::player::find $login
		921
		922	Returns the given player object, loading it if necessary (might block).
		923
		924	=cut
		925
		926	sub playerdir($) {
		927	cf::localdir
		928	. "/"
		929	. cf::playerdir
		930	. "/"
		931	. (ref $_[0] ? $_[0]->ob->name : $_[0])
		932	}
		933
		934	sub path($) {
		935	my $login = ref $_[0] ? $_[0]->ob->name : $_[0];
		936
		937	(playerdir $login) . "/$login.pl"
		938	}
		939
		940	sub find_active($) {
		941	$cf::PLAYER{$_[0]}
		942	and $cf::PLAYER{$_[0]}->active
		943	and $cf::PLAYER{$_[0]}
		944	}
		945
		946	sub exists($) {
237	my ($who, $arg) = @_;	947	my ($login) = @_;
238		948
239	if ($who->flag (FLAG_WIZ)) {	949	$cf::PLAYER{$login}
240	$who->message ("reloading...");	950	or cf::sync_job { !aio_stat $login }
		951	}
241		952
242	warn "reloading...\n";	953	sub find($) {
243	eval {	954	return $cf::PLAYER{$_[0]} || do {
244	# 1. cancel all watchers	955	my $login = $_[0];
245	$_->cancel for Event::all_watchers;
246		956
247	# 2. unload all extensions	957	my $guard = cf::lock_acquire "user_find:$login";
248	for (@exts) {
249	$who->message ("unloading <$_>");
250	unload_extension $_;
251	}
252		958
253	# 3. unload all modules loaded from $LIBDIR	959	$cf::PLAYER{$_[0]} || do {
254	while (my ($k, $v) = each %INC) {	960	my $pl = load_pl path $login
255	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;	961	or return;
256		962	$cf::PLAYER{$login} = $pl
257	$who->message ("removing <$k>");
258	delete $INC{$k};
259
260	$k =~ s/\.pm$//;
261	$k =~ s/\//::/g;
262
263	if (my $cb = $k->can ("unload_module")) {
264	$cb->();
265	}
266
267	Symbol::delete_package $k;
268	}
269
270	# 4. get rid of ext::, as good as possible
271	Symbol::delete_package "ext::$_"
272	for qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region);
273
274	# 5. remove register_script_function callbacks
275	# TODO
276
277	# 6. unload cf.pm "a bit"
278	delete $INC{"cf.pm"};
279
280	# don't, removes xs symbols, too
281	#Symbol::delete_package __PACKAGE__;
282
283	# 7. reload cf.pm
284	$who->message ("reloading cf.pm");
285	require cf;
286	};	963	}
287	warn $@ if $@;	964	}
288	$who->message ($@) if $@;	965	}
289	warn "reloaded\n";
290		966
291	$who->message ("reloaded");	967	sub save($) {
		968	my ($pl) = @_;
		969
		970	return if $pl->{deny_save};
		971
		972	my $path = path $pl;
		973	my $guard = cf::lock_acquire "user_save:$path";
		974
		975	return if $pl->{deny_save};
		976
		977	aio_mkdir playerdir $pl, 0770;
		978	$pl->{last_save} = $cf::RUNTIME;
		979
		980	$pl->save_pl ($path);
		981	Coro::cede;
		982	}
		983
		984	sub new($) {
		985	my ($login) = @_;
		986
		987	my $self = create;
		988
		989	$self->ob->name ($login);
		990	$self->{deny_save} = 1;
		991
		992	$cf::PLAYER{$login} = $self;
		993
		994	$self
		995	}
		996
		997	=item $pl->quit_character
		998
		999	Nukes the player without looking back. If logged in, the connection will
		1000	be destroyed. May block for a long time.
		1001
		1002	=cut
		1003
		1004	sub quit_character {
		1005	my ($pl) = @_;
		1006
		1007	$pl->{deny_save} = 1;
		1008	$pl->password ("*"); # this should lock out the player until we nuked the dir
		1009
		1010	$pl->invoke (cf::EVENT_PLAYER_LOGOUT, 1) if $pl->active;
		1011	$pl->deactivate;
		1012	$pl->invoke (cf::EVENT_PLAYER_QUIT);
		1013	$pl->ns->destroy if $pl->ns;
		1014
		1015	my $path = playerdir $pl;
		1016	my $temp = "$path~$cf::RUNTIME~deleting~";
		1017	aio_rename $path, $temp;
		1018	delete $cf::PLAYER{$pl->ob->name};
		1019	$pl->destroy;
		1020	IO::AIO::aio_rmtree $temp;
		1021	}
		1022
		1023	=item cf::player::list_logins
		1024
		1025	Returns am arrayref of all valid playernames in the system, can take a
		1026	while and may block, so not sync_job-capable, ever.
		1027
		1028	=cut
		1029
		1030	sub list_logins {
		1031	my $dirs = aio_readdir cf::localdir . "/" . cf::playerdir
		1032	or return [];
		1033
		1034	my @logins;
		1035
		1036	for my $login (@$dirs) {
		1037	my $fh = aio_open path $login, Fcntl::O_RDONLY, 0 or next;
		1038	aio_read $fh, 0, 512, my $buf, 0 or next;
		1039	$buf !~ /^password -------------$/m or next; # official not-valid tag
		1040
		1041	utf8::decode $login;
		1042	push @logins, $login;
		1043	}
		1044
		1045	\@logins
		1046	}
		1047
		1048	=item $player->maps
		1049
		1050	Returns an arrayref of map paths that are private for this
		1051	player. May block.
		1052
		1053	=cut
		1054
		1055	sub maps($) {
		1056	my ($pl) = @_;
		1057
		1058	my $files = aio_readdir playerdir $pl
		1059	or return;
		1060
		1061	my @paths;
		1062
		1063	for (@$files) {
		1064	utf8::decode $_;
		1065	next if /\.(?:pl|pst)$/;
		1066	next unless /^$PATH_SEP/o;
		1067
		1068	s/\.map$//;
		1069	push @paths, "~" . $pl->ob->name . "/" . $_;
		1070	}
		1071
		1072	\@paths
		1073	}
		1074
		1075	=item $player->ext_reply ($msgid, $msgtype, %msg)
		1076
		1077	Sends an ext reply to the player.
		1078
		1079	=cut
		1080
		1081	sub ext_reply($$$%) {
		1082	my ($self, $id, %msg) = @_;
		1083
		1084	$msg{msgid} = $id;
		1085
		1086	$self->send ("ext " . cf::to_json \%msg);
		1087	}
		1088
		1089	package cf;
		1090
		1091	=back
		1092
		1093
		1094	=head3 cf::map
		1095
		1096	=over 4
		1097
		1098	=cut
		1099
		1100	package cf::map;
		1101
		1102	use Fcntl;
		1103	use Coro::AIO;
		1104
		1105	use overload
		1106	'""' => \&as_string;
		1107
		1108	our $MAX_RESET = 3600;
		1109	our $DEFAULT_RESET = 3000;
		1110
		1111	sub generate_random_map {
		1112	my ($self, $rmp) = @_;
		1113
		1114	# mit "rum" bekleckern, nicht
		1115	$self->_create_random_map (
		1116	$rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
		1117	$rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
		1118	$rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
		1119	$rmp->{exit_on_final_map},
		1120	$rmp->{xsize}, $rmp->{ysize},
		1121	$rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
		1122	$rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
		1123	$rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
		1124	$rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
		1125	$rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
		1126	(cf::region::find $rmp->{region}), $rmp->{custom}
		1127	)
		1128	}
		1129
		1130	sub register {
		1131	my (undef, $regex) = @_;
		1132	my $pkg = caller;
		1133
		1134	no strict;
		1135	push @{"$pkg\::ISA"}, __PACKAGE__;
		1136
		1137	$EXT_MAP{$pkg} = qr<$regex>;
		1138	}
		1139
		1140	# also paths starting with '/'
		1141	$EXT_MAP{"cf::map"} = qr{^(?=/)};
		1142
		1143	sub normalise {
		1144	my ($path, $base) = @_;
		1145
		1146	# map plan:
		1147	#
		1148	# /! non-realised random map exit (special hack!)
		1149	# {... are special paths that are not being touched
		1150	# ?xxx/... are special absolute paths
		1151	# ?random/... random maps
		1152	# /... normal maps
		1153	# ~user/... per-player map of a specific user
		1154
		1155	$path =~ s/$PATH_SEP/\//go;
		1156
		1157	# treat it as relative path if it starts with
		1158	# something that looks reasonable
		1159	if ($path =~ m{^(?:\./|\.\./|\w)}) {
		1160	$base or Carp::carp "normalise called with relative path and no base: '$path'";
		1161
		1162	$base =~ s{[^/]+/?$}{};
		1163	$path = "$base/$path";
		1164	}
		1165
		1166	for ($path) {
		1167	redo if s{//}{/};
		1168	redo if s{/\.?/}{/};
		1169	redo if s{/[^/]+/\.\./}{/};
		1170	}
		1171
		1172	$path
		1173	}
		1174
		1175	sub new_from_path {
		1176	my (undef, $path, $base) = @_;
		1177
		1178	return $path if UNIVERSAL::isa $path, "cf::map"; # already a map object
		1179
		1180	$path = normalise $path, $base;
		1181
		1182	for my $pkg (keys %EXT_MAP) {
		1183	if ($path =~ $EXT_MAP{$pkg}) {
		1184	my $self = bless cf::map::new, $pkg;
		1185	$self->{path} = $path; $self->path ($path);
		1186	$self->init; # pass $1 etc.
		1187	return $self;
		1188	}
		1189	}
		1190
		1191	Carp::carp "unable to resolve path '$path'.";
		1192	()
		1193	}
		1194
		1195	sub init {
		1196	my ($self) = @_;
		1197
		1198	$self
		1199	}
		1200
		1201	sub as_string {
		1202	my ($self) = @_;
		1203
		1204	"$self->{path}"
		1205	}
		1206
		1207	# the displayed name, this is a one way mapping
		1208	sub visible_name {
		1209	&as_string
		1210	}
		1211
		1212	# the original (read-only) location
		1213	sub load_path {
		1214	my ($self) = @_;
		1215
		1216	sprintf "%s/%s/%s", cf::datadir, cf::mapdir, $self->{path}
		1217	}
		1218
		1219	# the temporary/swap location
		1220	sub save_path {
		1221	my ($self) = @_;
		1222
		1223	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1224	sprintf "%s/%s/%s", cf::localdir, cf::tmpdir, $path
		1225	}
		1226
		1227	# the unique path, undef == no special unique path
		1228	sub uniq_path {
		1229	my ($self) = @_;
		1230
		1231	(my $path = $_[0]{path}) =~ s/\//$PATH_SEP/g;
		1232	sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $path
		1233	}
		1234
		1235	# and all this just because we cannot iterate over
		1236	# all maps in C++...
		1237	sub change_all_map_light {
		1238	my ($change) = @_;
		1239
		1240	$_->change_map_light ($change)
		1241	for grep $_->outdoor, values %cf::MAP;
		1242	}
		1243
		1244	sub unlink_save {
		1245	my ($self) = @_;
		1246
		1247	utf8::encode (my $save = $self->save_path);
		1248	IO::AIO::aioreq_pri 4; IO::AIO::aio_unlink $save;
		1249	IO::AIO::aioreq_pri 4; IO::AIO::aio_unlink "$save.pst";
		1250	}
		1251
		1252	sub load_header_from($) {
		1253	my ($self, $path) = @_;
		1254
		1255	utf8::encode $path;
		1256	aio_open $path, O_RDONLY, 0
		1257	or return;
		1258
		1259	$self->_load_header ($path)
		1260	or return;
		1261
		1262	$self->{load_path} = $path;
		1263
		1264	1
		1265	}
		1266
		1267	sub load_orig {
		1268	my ($self) = @_;
		1269
		1270	$self->load_header_from ($self->load_path)
		1271	}
		1272
		1273	sub load_temp {
		1274	my ($self) = @_;
		1275
		1276	$self->load_header_from ($self->save_path)
		1277	}
		1278
		1279	sub load_header {
		1280	my ($self) = @_;
		1281
		1282	if ($self->load_temp) {
		1283	$self->last_access ((delete $self->{last_access})
		1284	|| $cf::RUNTIME); #d#
		1285	# safety
		1286	$self->{instantiate_time} = $cf::RUNTIME
		1287	if $self->{instantiate_time} > $cf::RUNTIME;
292	} else {	1288	} else {
293	$who->message ("Intruder Alert!");	1289	$self->load_orig
		1290	or return;
		1291
		1292	$self->{load_original} = 1;
		1293	$self->{instantiate_time} = $cf::RUNTIME;
		1294	$self->last_access ($cf::RUNTIME);
		1295	$self->instantiate;
		1296	}
		1297
		1298	1
		1299	}
		1300
		1301	sub find;
		1302	sub find {
		1303	my ($path, $origin) = @_;
		1304
		1305	$path = normalise $path, $origin && $origin->path;
		1306
		1307	cf::lock_wait "map_find:$path";
		1308
		1309	$cf::MAP{$path} || do {
		1310	my $guard = cf::lock_acquire "map_find:$path";
		1311	my $map = new_from_path cf::map $path
		1312	or return;
		1313
		1314	$map->{last_save} = $cf::RUNTIME;
		1315
		1316	$map->load_header
		1317	or return;
		1318
		1319	if ($map->should_reset) {
		1320	$map->reset;
		1321	undef $guard;
		1322	$map = find $path
		1323	or return;
		1324	}
		1325
		1326	$cf::MAP{$path} = $map
		1327	}
		1328	}
		1329
		1330	sub load {
		1331	my ($self) = @_;
		1332
		1333	my $path = $self->{path};
		1334	my $guard = cf::lock_acquire "map_load:$path";
		1335
		1336	return if $self->in_memory != cf::MAP_SWAPPED;
		1337
		1338	$self->in_memory (cf::MAP_LOADING);
		1339
		1340	$self->alloc;
		1341	$self->_load_objects ($self->{load_path}, 1)
		1342	or return;
		1343
		1344	$self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
		1345	if delete $self->{load_original};
		1346
		1347	if (my $uniq = $self->uniq_path) {
		1348	utf8::encode $uniq;
		1349	if (aio_open $uniq, O_RDONLY, 0) {
		1350	$self->clear_unique_items;
		1351	$self->_load_objects ($uniq, 0);
		1352	}
		1353	}
		1354
		1355	Coro::cede;
		1356
		1357	# now do the right thing for maps
		1358	$self->link_multipart_objects;
		1359
		1360	unless ($self->{deny_activate}) {
		1361	$self->decay_objects;
		1362	$self->fix_auto_apply;
		1363	$self->update_buttons;
		1364	Coro::cede;
		1365	$self->set_darkness_map;
		1366	$self->difficulty ($self->estimate_difficulty)
		1367	unless $self->difficulty;
		1368	Coro::cede;
		1369	$self->activate;
		1370	}
		1371
		1372	$self->in_memory (cf::MAP_IN_MEMORY);
		1373	}
		1374
		1375	sub customise_for {
		1376	my ($self, $ob) = @_;
		1377
		1378	return find "~" . $ob->name . "/" . $self->{path}
		1379	if $self->per_player;
		1380
		1381	$self
		1382	}
		1383
		1384	# find and load all maps in the 3x3 area around a map
		1385	sub load_diag {
		1386	my ($map) = @_;
		1387
		1388	my @diag; # diagonal neighbours
		1389
		1390	for (0 .. 3) {
		1391	my $neigh = $map->tile_path ($_)
		1392	or next;
		1393	$neigh = find $neigh, $map
		1394	or next;
		1395	$neigh->load;
		1396
		1397	push @diag, [$neigh->tile_path (($_ + 3) % 4), $neigh],
		1398	[$neigh->tile_path (($_ + 1) % 4), $neigh];
		1399	}
		1400
		1401	for (@diag) {
		1402	my $neigh = find @$_
		1403	or next;
		1404	$neigh->load;
		1405	}
		1406	}
		1407
		1408	sub find_sync {
		1409	my ($path, $origin) = @_;
		1410
		1411	cf::sync_job { find $path, $origin }
		1412	}
		1413
		1414	sub do_load_sync {
		1415	my ($map) = @_;
		1416
		1417	cf::sync_job { $map->load };
		1418	}
		1419
		1420	our %MAP_PREFETCH;
		1421	our $MAP_PREFETCHER = Coro::async {
		1422	while () {
		1423	for my $path (keys %MAP_PREFETCH) {
		1424	my $map = find $path
		1425	or next;
		1426	$map->load;
		1427
		1428	delete $MAP_PREFETCH{$path};
		1429	}
		1430	Coro::schedule;
294	}	1431	}
295	};	1432	};
296		1433
297	#############################################################################	1434	sub find_async {
298	# utility functions	1435	my ($path, $origin) = @_;
299		1436
300	use JSON::Syck (); # TODO# replace by JSON::PC once working	1437	$path = normalise $path, $origin && $origin->{path};
301		1438
302	sub from_json($) {	1439	if (my $map = $cf::MAP{$path}) {
303	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs	1440	return $map if $map->in_memory == cf::MAP_IN_MEMORY;
304	JSON::Syck::Load $_[0]	1441	}
305	}
306		1442
307	sub to_json($) {	1443	$MAP_PREFETCH{$path} = 0;
308	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs	1444	$MAP_PREFETCHER->ready;
309	JSON::Syck::Dump $_[0]
310	}
311		1445
312	#############################################################################	1446	()
313	# extcmd framework, basically convert ext <msg>	1447	}
314	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
315		1448
316	sub on_extcmd {	1449	sub save {
317	my ($pl, $buf) = @_;	1450	my ($self) = @_;
318		1451
319	my $msg = eval { from_json $buf };	1452	my $lock = cf::lock_acquire "map_data:" . $self->path;
320		1453
321	if (ref $msg) {	1454	$self->{last_save} = $cf::RUNTIME;
322	if (my $cb = $extcmd{$msg->{msgtype}}) {	1455
323	if (my %reply = $cb->[0]->($pl, $msg)) {	1456	return unless $self->dirty;
324	$pl->ext_reply ($msg->{msgid}, %reply);	1457
325	}	1458	my $save = $self->save_path; utf8::encode $save;
326	}	1459	my $uniq = $self->uniq_path; utf8::encode $uniq;
		1460
		1461	$self->{load_path} = $save;
		1462
		1463	return if $self->{deny_save};
		1464
		1465	local $self->{last_access} = $self->last_access;#d#
		1466
		1467	cf::async {
		1468	$_->contr->save for $self->players;
		1469	};
		1470
		1471	if ($uniq) {
		1472	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
		1473	$self->_save_objects ($uniq, cf::IO_UNIQUES);
327	} else {	1474	} else {
328	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";	1475	$self->_save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
329	}
330
331	1	1476	}
332	}	1477	}
333		1478
334	#############################################################################	1479	sub swap_out {
335	# load/save/clean perl data associated with a map
336
337	*on_mapclean = sub {
338	my ($map) = @_;	1480	my ($self) = @_;
339		1481
340	my $path = $map->tmpname;	1482	# save first because save cedes
341	defined $path or return;	1483	$self->save;
342		1484
343	unlink "$path.cfperl";	1485	my $lock = cf::lock_acquire "map_data:" . $self->path;
344	};
345		1486
346	*on_mapin =	1487	return if $self->players;
347	*on_mapload = sub {	1488	return if $self->in_memory != cf::MAP_IN_MEMORY;
		1489	return if $self->{deny_save};
		1490
		1491	$self->clear;
		1492	$self->in_memory (cf::MAP_SWAPPED);
		1493	}
		1494
		1495	sub reset_at {
348	my ($map) = @_;	1496	my ($self) = @_;
349		1497
350	my $path = $map->tmpname;	1498	# TODO: safety, remove and allow resettable per-player maps
351	$path = $map->path unless defined $path;	1499	return 1e99 if $self->isa ("ext::map_per_player");
		1500	return 1e99 if $self->{deny_reset};
352		1501
353	open my $fh, "<:raw", "$path.cfperl"	1502	my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
354	or return; # no perl data	1503	my $to = List::Util::min $MAX_RESET, $self->reset_timeout || $DEFAULT_RESET;
355		1504
356	my $data = Storable::thaw do { local $/; <$fh> };	1505	$time + $to
		1506	}
357		1507
358	$data->{version} <= 1	1508	sub should_reset {
359	or return; # too new
360
361	$map->_set_obs ($data->{obs});
362	};
363
364	*on_mapout = sub {
365	my ($map) = @_;	1509	my ($self) = @_;
366		1510
367	my $path = $map->tmpname;	1511	$self->reset_at <= $cf::RUNTIME
368	$path = $map->path unless defined $path;
369
370	my $obs = $map->_get_obs;
371
372	if (defined $obs) {
373	open my $fh, ">:raw", "$path.cfperl"
374	or die "$path.cfperl: $!";
375
376	stat $path;
377
378	print $fh Storable::nfreeze {
379	size => (stat _)[7],
380	time => (stat _)[9],
381	version => 1,
382	obs => $obs,
383	};
384
385	chmod SAVE_MODE, "$path.cfperl"; # very racy, but cf-compatible *g*
386	} else {
387	unlink "$path.cfperl";
388	}
389	};
390
391	#############################################################################
392	# load/save perl data associated with player->ob objects
393
394	sub all_objects(@) {
395	@_, map all_objects ($_->inv), @_
396	}	1512	}
397		1513
398	*on_player_load = sub {	1514	sub rename {
399	my ($ob, $path) = @_;	1515	my ($self, $new_path) = @_;
400		1516
401	for my $o (all_objects $ob) {	1517	normalise $new_path;
402	if (my $value = $o->get_ob_key_value ("_perl_data")) {
403	$o->set_ob_key_value ("_perl_data");
404		1518
405	%$o = %{ Storable::thaw pack "H*", $value };	1519	$self->unlink_save;
406	}
407	}
408	};
409		1520
410	*on_player_save = sub {	1521	delete $cf::MAP{$self->path};
411	my ($ob, $path) = @_;	1522	$self->{path} = $new_path; $self->path ($self->{path});
		1523	$cf::MAP{$self->path} = $self;
412		1524
413	$_->set_ob_key_value (_perl_data => unpack "H*", Storable::nfreeze $_)	1525	$self->save;
414	for grep %$_, all_objects $ob;
415	};
416
417	#############################################################################
418	# core extensions - in perl
419
420	=item cf::player::exists $login
421
422	Returns true when the given account exists.
423
424	=cut
425
426	sub cf::player::exists($) {
427	cf::player::find $_[0]
428	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
429	}	1526	}
430		1527
		1528	sub reset {
		1529	my ($self) = @_;
		1530
		1531	my $lock = cf::lock_acquire "map_data:$self->{path}";
		1532
		1533	return if $self->players;
		1534	return if $self->isa ("ext::map_per_player");#d#
		1535
		1536	warn "resetting map ", $self->path;#d#
		1537
		1538	delete $cf::MAP{$self->path};
		1539
		1540	$self->in_memory (cf::MAP_SWAPPED);
		1541	$self->clear;
		1542
		1543	$_->clear_links_to ($self) for values %cf::MAP;
		1544
		1545	$self->unlink_save;
		1546	$self->destroy;
		1547	}
		1548
		1549	my $nuke_counter = "aaaa";
		1550
		1551	sub nuke {
		1552	my ($self) = @_;
		1553
		1554	$self->{deny_save} = 1;
		1555	$self->reset_timeout (1);
		1556	$self->rename ("{nuke}/" . ($nuke_counter++));
		1557	$self->reset; # polite request, might not happen
		1558	}
		1559
		1560	=item cf::map::unique_maps
		1561
		1562	Returns an arrayref of paths of all shared maps that have
		1563	instantiated unique items. May block.
		1564
		1565	=cut
		1566
		1567	sub unique_maps() {
		1568	my $files = aio_readdir cf::localdir . "/" . cf::uniquedir
		1569	or return;
		1570
		1571	my @paths;
		1572
		1573	for (@$files) {
		1574	utf8::decode $_;
		1575	next if /\.pst$/;
		1576	next unless /^$PATH_SEP/o;
		1577
		1578	s/\.map$//;
		1579	push @paths, $_;
		1580	}
		1581
		1582	\@paths
		1583	}
		1584
		1585	package cf;
		1586
		1587	=back
		1588
		1589	=head3 cf::object
		1590
		1591	=cut
		1592
		1593	package cf::object;
		1594
		1595	=over 4
		1596
		1597	=item $ob->inv_recursive
		1598
		1599	Returns the inventory of the object _and_ their inventories, recursively.
		1600
		1601	=cut
		1602
		1603	sub inv_recursive_;
		1604	sub inv_recursive_ {
		1605	map { $_, inv_recursive_ $_->inv } @_
		1606	}
		1607
		1608	sub inv_recursive {
		1609	inv_recursive_ inv $_[0]
		1610	}
		1611
		1612	package cf;
		1613
		1614	=back
		1615
		1616	=head3 cf::object::player
		1617
		1618	=over 4
		1619
431	=item $player->reply ($npc, $msg[, $flags])	1620	=item $player_object->reply ($npc, $msg[, $flags])
432		1621
433	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	1622	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
434	can be C<undef>. Does the right thing when the player is currently in a	1623	can be C<undef>. Does the right thing when the player is currently in a
435	dialogue with the given NPC character.	1624	dialogue with the given NPC character.
436		1625
437	=cut	1626	=cut
438		1627
439	# rough implementation of a future "reply" method that works	1628	# rough implementation of a future "reply" method that works
440	# with dialog boxes.	1629	# with dialog boxes.
		1630	#TODO: the first argument must go, split into a $npc->reply_to ( method
441	sub cf::object::player::reply($$$;$) {	1631	sub cf::object::player::reply($$$;$) {
442	my ($self, $npc, $msg, $flags) = @_;	1632	my ($self, $npc, $msg, $flags) = @_;
443		1633
444	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	1634	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
445		1635
…		…
449	$msg = $npc->name . " says: $msg" if $npc;	1639	$msg = $npc->name . " says: $msg" if $npc;
450	$self->message ($msg, $flags);	1640	$self->message ($msg, $flags);
451	}	1641	}
452	}	1642	}
453		1643
454	=item $player->ext_reply ($msgid, $msgtype, %msg)	1644	=item $player_object->may ("access")
455		1645
456	Sends an ext reply to the player.	1646	Returns wether the given player is authorized to access resource "access"
		1647	(e.g. "command_wizcast").
457		1648
458	=cut	1649	=cut
459		1650
460	sub cf::player::ext_reply($$$%) {	1651	sub cf::object::player::may {
		1652	my ($self, $access) = @_;
		1653
		1654	$self->flag (cf::FLAG_WIZ) ||
		1655	(ref $cf::CFG{"may_$access"}
		1656	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		1657	: $cf::CFG{"may_$access"})
		1658	}
		1659
		1660	=item $player_object->enter_link
		1661
		1662	Freezes the player and moves him/her to a special map (C<{link}>).
		1663
		1664	The player should be reasonably safe there for short amounts of time. You
		1665	I<MUST> call C<leave_link> as soon as possible, though.
		1666
		1667	Will never block.
		1668
		1669	=item $player_object->leave_link ($map, $x, $y)
		1670
		1671	Moves the player out of the special C<{link}> map onto the specified
		1672	map. If the map is not valid (or omitted), the player will be moved back
		1673	to the location he/she was before the call to C<enter_link>, or, if that
		1674	fails, to the emergency map position.
		1675
		1676	Might block.
		1677
		1678	=cut
		1679
		1680	sub link_map {
		1681	unless ($LINK_MAP) {
		1682	$LINK_MAP = cf::map::find "{link}"
		1683	or do { warn "FATAL: unable to provide {link} map, exiting."; exit 1 };
		1684	$LINK_MAP->load;
		1685	}
		1686
		1687	$LINK_MAP
		1688	}
		1689
		1690	sub cf::object::player::enter_link {
		1691	my ($self) = @_;
		1692
		1693	$self->deactivate_recursive;
		1694
		1695	return if UNIVERSAL::isa $self->map, "ext::map_link";
		1696
		1697	$self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
		1698	if $self->map;
		1699
		1700	$self->enter_map ($LINK_MAP || link_map, 20, 20);
		1701	}
		1702
		1703	sub cf::object::player::leave_link {
		1704	my ($self, $map, $x, $y) = @_;
		1705
		1706	my $link_pos = delete $self->{_link_pos};
		1707
		1708	unless ($map) {
		1709	# restore original map position
		1710	($map, $x, $y) = @{ $link_pos || [] };
		1711	$map = cf::map::find $map;
		1712
		1713	unless ($map) {
		1714	($map, $x, $y) = @$EMERGENCY_POSITION;
		1715	$map = cf::map::find $map
		1716	or die "FATAL: cannot load emergency map\n";
		1717	}
		1718	}
		1719
		1720	($x, $y) = (-1, -1)
		1721	unless (defined $x) && (defined $y);
		1722
		1723	# use -1 or undef as default coordinates, not 0, 0
		1724	($x, $y) = ($map->enter_x, $map->enter_y)
		1725	if $x <=0 && $y <= 0;
		1726
		1727	$map->load;
		1728	$map->load_diag;
		1729
		1730	return unless $self->contr->active;
		1731	$self->activate_recursive;
		1732	$self->enter_map ($map, $x, $y);
		1733	}
		1734
		1735	cf::player->attach (
		1736	on_logout => sub {
		1737	my ($pl) = @_;
		1738
		1739	# abort map switching before logout
		1740	if ($pl->ob->{_link_pos}) {
		1741	cf::sync_job {
		1742	$pl->ob->leave_link
		1743	};
		1744	}
		1745	},
		1746	on_login => sub {
		1747	my ($pl) = @_;
		1748
		1749	# try to abort aborted map switching on player login :)
		1750	# should happen only on crashes
		1751	if ($pl->ob->{_link_pos}) {
		1752	$pl->ob->enter_link;
		1753	(async {
		1754	# we need this sleep as the login has a concurrent enter_exit running
		1755	# and this sleep increases chances of the player not ending up in scorn
		1756	$pl->ob->reply (undef,
		1757	"There was an internal problem at your last logout, "
		1758	. "the server will try to bring you to your intended destination in a second.",
		1759	cf::NDI_RED);
		1760	Coro::Timer::sleep 1;
		1761	$pl->ob->leave_link;
		1762	})->prio (2);
		1763	}
		1764	},
		1765	);
		1766
		1767	=item $player_object->goto ($path, $x, $y)
		1768
		1769	=cut
		1770
		1771	sub cf::object::player::goto {
		1772	my ($self, $path, $x, $y) = @_;
		1773
		1774	$self->enter_link;
		1775
		1776	(async {
		1777	my $map = cf::map::find $path;
		1778	$map = $map->customise_for ($self) if $map;
		1779
		1780	# warn "entering ", $map->path, " at ($x, $y)\n"
		1781	# if $map;
		1782
		1783	$map or $self->message ("The exit to '" . ($path->visible_name) . "' is closed", cf::NDI_UNIQUE | cf::NDI_RED);
		1784
		1785	$self->leave_link ($map, $x, $y);
		1786	})->prio (1);
		1787	}
		1788
		1789	=item $player_object->enter_exit ($exit_object)
		1790
		1791	=cut
		1792
		1793	sub parse_random_map_params {
		1794	my ($spec) = @_;
		1795
		1796	my $rmp = { # defaults
		1797	xsize => 10,
		1798	ysize => 10,
		1799	};
		1800
		1801	for (split /\n/, $spec) {
		1802	my ($k, $v) = split /\s+/, $_, 2;
		1803
		1804	$rmp->{lc $k} = $v if (length $k) && (length $v);
		1805	}
		1806
		1807	$rmp
		1808	}
		1809
		1810	sub prepare_random_map {
		1811	my ($exit) = @_;
		1812
		1813	# all this does is basically replace the /! path by
		1814	# a new random map path (?random/...) with a seed
		1815	# that depends on the exit object
		1816
		1817	my $rmp = parse_random_map_params $exit->msg;
		1818
		1819	if ($exit->map) {
		1820	$rmp->{region} = $exit->map->region_name;
		1821	$rmp->{origin_map} = $exit->map->path;
		1822	$rmp->{origin_x} = $exit->x;
		1823	$rmp->{origin_y} = $exit->y;
		1824	}
		1825
		1826	$rmp->{random_seed} ||= $exit->random_seed;
		1827
		1828	my $data = cf::to_json $rmp;
		1829	my $md5 = Digest::MD5::md5_hex $data;
		1830
		1831	if (my $fh = aio_open "$cf::RANDOM_MAPS/$md5.meta", O_WRONLY | O_CREAT, 0666) {
		1832	aio_write $fh, 0, (length $data), $data, 0;
		1833
		1834	$exit->slaying ("?random/$md5");
		1835	$exit->msg (undef);
		1836	}
		1837	}
		1838
		1839	sub cf::object::player::enter_exit {
461	my ($self, $id, %msg) = @_;	1840	my ($self, $exit) = @_;
462		1841
463	$msg{msgid} = $id;	1842	return unless $self->type == cf::PLAYER;
464		1843
465	$self->send ("ext " . to_json \%msg);	1844	$self->enter_link;
466	}
467		1845
468	#############################################################################	1846	(async {
469	# map scripting support	1847	$self->deactivate_recursive; # just to be sure
		1848	unless (eval {
		1849	prepare_random_map $exit
		1850	if $exit->slaying eq "/!";
470		1851
		1852	my $path = new_from_path cf::map $exit->slaying, $exit->map && $exit->map->path;
		1853	$self->goto ($path, $exit->stats->hp, $exit->stats->sp);
		1854
		1855	1;
		1856	}) {
		1857	$self->message ("Something went wrong deep within the crossfire server. "
		1858	. "I'll try to bring you back to the map you were before. "
		1859	. "Please report this to the dungeon master!",
		1860	cf::NDI_UNIQUE | cf::NDI_RED);
		1861
		1862	warn "ERROR in enter_exit: $@";
		1863	$self->leave_link;
		1864	}
		1865	})->prio (1);
		1866	}
		1867
		1868	=head3 cf::client
		1869
		1870	=over 4
		1871
		1872	=item $client->send_drawinfo ($text, $flags)
		1873
		1874	Sends a drawinfo packet to the client. Circumvents output buffering so
		1875	should not be used under normal circumstances.
		1876
		1877	=cut
		1878
		1879	sub cf::client::send_drawinfo {
		1880	my ($self, $text, $flags) = @_;
		1881
		1882	utf8::encode $text;
		1883	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		1884	}
		1885
		1886
		1887	=item $success = $client->query ($flags, "text", \&cb)
		1888
		1889	Queues a query to the client, calling the given callback with
		1890	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		1891	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		1892
		1893	Queries can fail, so check the return code. Or don't, as queries will become
		1894	reliable at some point in the future.
		1895
		1896	=cut
		1897
		1898	sub cf::client::query {
		1899	my ($self, $flags, $text, $cb) = @_;
		1900
		1901	return unless $self->state == ST_PLAYING
		1902	|| $self->state == ST_SETUP
		1903	|| $self->state == ST_CUSTOM;
		1904
		1905	$self->state (ST_CUSTOM);
		1906
		1907	utf8::encode $text;
		1908	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		1909
		1910	$self->send_packet ($self->{query_queue}[0][0])
		1911	if @{ $self->{query_queue} } == 1;
		1912	}
		1913
		1914	cf::client->attach (
		1915	on_reply => sub {
		1916	my ($ns, $msg) = @_;
		1917
		1918	# this weird shuffling is so that direct followup queries
		1919	# get handled first
		1920	my $queue = delete $ns->{query_queue}
		1921	or return; # be conservative, not sure how that can happen, but we saw a crash here
		1922
		1923	(shift @$queue)->[1]->($msg);
		1924
		1925	push @{ $ns->{query_queue} }, @$queue;
		1926
		1927	if (@{ $ns->{query_queue} } == @$queue) {
		1928	if (@$queue) {
		1929	$ns->send_packet ($ns->{query_queue}[0][0]);
		1930	} else {
		1931	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		1932	}
		1933	}
		1934	},
		1935	);
		1936
		1937	=item $client->async (\&cb)
		1938
		1939	Create a new coroutine, running the specified callback. The coroutine will
		1940	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1941	or loss of connection).
		1942
		1943	=cut
		1944
		1945	sub cf::client::async {
		1946	my ($self, $cb) = @_;
		1947
		1948	my $coro = &Coro::async ($cb);
		1949
		1950	$coro->on_destroy (sub {
		1951	delete $self->{_coro}{$coro+0};
		1952	});
		1953
		1954	$self->{_coro}{$coro+0} = $coro;
		1955
		1956	$coro
		1957	}
		1958
		1959	cf::client->attach (
		1960	on_destroy => sub {
		1961	my ($ns) = @_;
		1962
		1963	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1964	},
		1965	);
		1966
		1967	=back
		1968
		1969
		1970	=head2 SAFE SCRIPTING
		1971
		1972	Functions that provide a safe environment to compile and execute
		1973	snippets of perl code without them endangering the safety of the server
		1974	itself. Looping constructs, I/O operators and other built-in functionality
		1975	is not available in the safe scripting environment, and the number of
		1976	functions and methods that can be called is greatly reduced.
		1977
		1978	=cut
		1979
471	our $safe = new Safe "ext";	1980	our $safe = new Safe "safe";
472	our $safe_hole = new Safe::Hole;	1981	our $safe_hole = new Safe::Hole;
473		1982
474	$SIG{FPE} = 'IGNORE';	1983	$SIG{FPE} = 'IGNORE';
475		1984
476	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	1985	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
477		1986
478	# here we export the classes and methods available to script code	1987	# here we export the classes and methods available to script code
479		1988
		1989	=pod
		1990
		1991	The following fucntions and emthods are available within a safe environment:
		1992
		1993	cf::object contr pay_amount pay_player map
		1994	cf::object::player player
		1995	cf::player peaceful
		1996	cf::map trigger
		1997
		1998	=cut
		1999
480	for (	2000	for (
481	["cf::object" => qw(contr pay_amount pay_player)],	2001	["cf::object" => qw(contr pay_amount pay_player map)],
482	["cf::object::player" => qw(player)],	2002	["cf::object::player" => qw(player)],
483	["cf::player" => qw(peaceful)],	2003	["cf::player" => qw(peaceful)],
		2004	["cf::map" => qw(trigger)],
484	) {	2005	) {
485	no strict 'refs';	2006	no strict 'refs';
486	my ($pkg, @funs) = @$_;	2007	my ($pkg, @funs) = @$_;
487	*{"ext::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	2008	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
488	for @funs;	2009	for @funs;
489	}	2010	}
		2011
		2012	=over 4
		2013
		2014	=item @retval = safe_eval $code, [var => value, ...]
		2015
		2016	Compiled and executes the given perl code snippet. additional var/value
		2017	pairs result in temporary local (my) scalar variables of the given name
		2018	that are available in the code snippet. Example:
		2019
		2020	my $five = safe_eval '$first + $second', first => 1, second => 4;
		2021
		2022	=cut
490		2023
491	sub safe_eval($;@) {	2024	sub safe_eval($;@) {
492	my ($code, %vars) = @_;	2025	my ($code, %vars) = @_;
493		2026
494	my $qcode = $code;	2027	my $qcode = $code;
495	$qcode =~ s/"/‟/g; # not allowed in #line filenames	2028	$qcode =~ s/"/‟/g; # not allowed in #line filenames
496	$qcode =~ s/\n/\\n/g;	2029	$qcode =~ s/\n/\\n/g;
497		2030
498	local $_;	2031	local $_;
499	local @ext::cf::_safe_eval_args = values %vars;	2032	local @safe::cf::_safe_eval_args = values %vars;
500		2033
501	$code =	2034	my $eval =
502	"do {\n"	2035	"do {\n"
503	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"	2036	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
504	. "#line 0 \"{$qcode}\"\n"	2037	. "#line 0 \"{$qcode}\"\n"
505	. $code	2038	. $code
506	. "\n}"	2039	. "\n}"
507	;	2040	;
508		2041
509	sub_generation_inc;	2042	sub_generation_inc;
510	my @res = wantarray ? $safe->reval ($code) : scalar $safe->reval ($code);	2043	my @res = wantarray ? $safe->reval ($eval) : scalar $safe->reval ($eval);
511	sub_generation_inc;	2044	sub_generation_inc;
512		2045
		2046	if ($@) {
		2047	warn "$@";
		2048	warn "while executing safe code '$code'\n";
		2049	warn "with arguments " . (join " ", %vars) . "\n";
		2050	}
		2051
513	wantarray ? @res : $res[0]	2052	wantarray ? @res : $res[0]
514	}	2053	}
		2054
		2055	=item cf::register_script_function $function => $cb
		2056
		2057	Register a function that can be called from within map/npc scripts. The
		2058	function should be reasonably secure and should be put into a package name
		2059	like the extension.
		2060
		2061	Example: register a function that gets called whenever a map script calls
		2062	C<rent::overview>, as used by the C<rent> extension.
		2063
		2064	cf::register_script_function "rent::overview" => sub {
		2065	...
		2066	};
		2067
		2068	=cut
515		2069
516	sub register_script_function {	2070	sub register_script_function {
517	my ($fun, $cb) = @_;	2071	my ($fun, $cb) = @_;
518		2072
519	no strict 'refs';	2073	no strict 'refs';
520	*{"ext::$fun"} = $safe_hole->wrap ($cb);	2074	*{"safe::$fun"} = $safe_hole->wrap ($cb);
		2075	}
		2076
		2077	=back
		2078
		2079	=cut
		2080
		2081	#############################################################################
		2082
		2083	=head2 EXTENSION DATABASE SUPPORT
		2084
		2085	Crossfire maintains a very simple database for extension use. It can
		2086	currently store anything that can be serialised using Storable, which
		2087	excludes objects.
		2088
		2089	The parameter C<$family> should best start with the name of the extension
		2090	using it, it should be unique.
		2091
		2092	=over 4
		2093
		2094	=item $hashref = cf::db_get $family
		2095
		2096	Return a hashref for use by the extension C<$family>, which can be
		2097	modified. After modifications, you have to call C<cf::db_dirty> or
		2098	C<cf::db_sync>.
		2099
		2100	=item $value = cf::db_get $family => $key
		2101
		2102	Returns a single value from the database
		2103
		2104	=item cf::db_put $family => $hashref
		2105
		2106	Stores the given family hashref into the database. Updates are delayed, if
		2107	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		2108
		2109	=item cf::db_put $family => $key => $value
		2110
		2111	Stores the given C<$value> in the family hash. Updates are delayed, if you
		2112	want the data to be synced to disk immediately, use C<cf::db_sync>.
		2113
		2114	=item cf::db_dirty
		2115
		2116	Marks the database as dirty, to be updated at a later time.
		2117
		2118	=item cf::db_sync
		2119
		2120	Immediately write the database to disk I<if it is dirty>.
		2121
		2122	=cut
		2123
		2124	our $DB;
		2125
		2126	{
		2127	my $path = cf::localdir . "/database.pst";
		2128
		2129	sub db_load() {
		2130	$DB = stat $path ? Storable::retrieve $path : { };
		2131	}
		2132
		2133	my $pid;
		2134
		2135	sub db_save() {
		2136	waitpid $pid, 0 if $pid;
		2137	if (0 == ($pid = fork)) {
		2138	$DB->{_meta}{version} = 1;
		2139	Storable::nstore $DB, "$path~";
		2140	rename "$path~", $path;
		2141	cf::_exit 0 if defined $pid;
		2142	}
		2143	}
		2144
		2145	my $dirty;
		2146
		2147	sub db_sync() {
		2148	db_save if $dirty;
		2149	undef $dirty;
		2150	}
		2151
		2152	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		2153	db_sync;
		2154	});
		2155
		2156	sub db_dirty() {
		2157	$dirty = 1;
		2158	$idle->start;
		2159	}
		2160
		2161	sub db_get($;$) {
		2162	@_ >= 2
		2163	? $DB->{$_[0]}{$_[1]}
		2164	: ($DB->{$_[0]} ||= { })
		2165	}
		2166
		2167	sub db_put($$;$) {
		2168	if (@_ >= 3) {
		2169	$DB->{$_[0]}{$_[1]} = $_[2];
		2170	} else {
		2171	$DB->{$_[0]} = $_[1];
		2172	}
		2173	db_dirty;
		2174	}
		2175
		2176	cf::global->attach (
		2177	prio => 10000,
		2178	on_cleanup => sub {
		2179	db_sync;
		2180	},
		2181	);
521	}	2182	}
522		2183
523	#############################################################################	2184	#############################################################################
524	# the server's main()	2185	# the server's main()
525		2186
526	sub run {	2187	sub cfg_load {
		2188	open my $fh, "<:utf8", cf::confdir . "/config"
		2189	or return;
		2190
		2191	local $/;
		2192	*CFG = YAML::Syck::Load <$fh>;
		2193
		2194	$EMERGENCY_POSITION = $CFG{emergency_position} || ["/world/world_105_115", 5, 37];
		2195
		2196	$cf::map::MAX_RESET = $CFG{map_max_reset} if exists $CFG{map_max_reset};
		2197	$cf::map::DEFAULT_RESET = $CFG{map_default_reset} if exists $CFG{map_default_reset};
		2198
		2199	if (exists $CFG{mlockall}) {
		2200	eval {
		2201	$CFG{mlockall} ? eval "mlockall()" : eval "munlockall()"
		2202	and die "WARNING: m(un)lockall failed: $!\n";
		2203	};
		2204	warn $@ if $@;
		2205	}
		2206	}
		2207
		2208	sub main {
		2209	# we must not ever block the main coroutine
		2210	local $Coro::idle = sub {
		2211	Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
		2212	async { Event::one_event };
		2213	};
		2214
		2215	cfg_load;
		2216	db_load;
		2217	load_extensions;
527	Event::loop;	2218	Event::loop;
528	}	2219	}
529		2220
530	#############################################################################	2221	#############################################################################
531	# initialisation	2222	# initialisation and cleanup
532		2223
533	register "<global>", __PACKAGE__;	2224	# install some emergency cleanup handlers
		2225	BEGIN {
		2226	for my $signal (qw(INT HUP TERM)) {
		2227	Event->signal (
		2228	data => WF_AUTOCANCEL,
		2229	signal => $signal,
		2230	cb => sub {
		2231	cf::cleanup "SIG$signal";
		2232	},
		2233	);
		2234	}
		2235	}
		2236
		2237	sub emergency_save() {
		2238	my $freeze_guard = cf::freeze_mainloop;
		2239
		2240	warn "enter emergency perl save\n";
		2241
		2242	cf::sync_job {
		2243	# use a peculiar iteration method to avoid tripping on perl
		2244	# refcount bugs in for. also avoids problems with players
		2245	# and maps saved/destroyed asynchronously.
		2246	warn "begin emergency player save\n";
		2247	for my $login (keys %cf::PLAYER) {
		2248	my $pl = $cf::PLAYER{$login} or next;
		2249	$pl->valid or next;
		2250	$pl->save;
		2251	}
		2252	warn "end emergency player save\n";
		2253
		2254	warn "begin emergency map save\n";
		2255	for my $path (keys %cf::MAP) {
		2256	my $map = $cf::MAP{$path} or next;
		2257	$map->valid or next;
		2258	$map->save;
		2259	}
		2260	warn "end emergency map save\n";
		2261	};
		2262
		2263	warn "leave emergency perl save\n";
		2264	}
		2265
		2266	sub reload() {
		2267	# can/must only be called in main
		2268	if ($Coro::current != $Coro::main) {
		2269	warn "can only reload from main coroutine\n";
		2270	return;
		2271	}
		2272
		2273	warn "reloading...";
		2274
		2275	warn "freezing server";
		2276	my $guard = freeze_mainloop;
		2277	cf::emergency_save;
		2278
		2279	warn "sync database to disk";
		2280	cf::db_sync;
		2281	IO::AIO::flush;
		2282
		2283	eval {
		2284	# if anything goes wrong in here, we should simply crash as we already saved
		2285
		2286	warn "cancel all watchers";
		2287	for (Event::all_watchers) {
		2288	$_->cancel if $_->data & WF_AUTOCANCEL;
		2289	}
		2290
		2291	warn "cancel all extension coros";
		2292	$_->cancel for values %EXT_CORO;
		2293	%EXT_CORO = ();
		2294
		2295	warn "remove commands";
		2296	%COMMAND = ();
		2297
		2298	warn "remove ext commands";
		2299	%EXTCMD = ();
		2300
		2301	warn "unload/nuke all extensions";
		2302	for my $pkg (@EXTS) {
		2303	warn "... unloading $pkg";
		2304
		2305	if (my $cb = $pkg->can ("unload")) {
		2306	eval {
		2307	$cb->($pkg);
		2308	1
		2309	} or warn "$pkg unloaded, but with errors: $@";
		2310	}
		2311
		2312	warn "... nuking $pkg";
		2313	Symbol::delete_package $pkg;
		2314	}
		2315
		2316	warn "unload all perl modules loaded from $LIBDIR";
		2317	while (my ($k, $v) = each %INC) {
		2318	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		2319
		2320	warn "removing <$k>";
		2321	delete $INC{$k};
		2322
		2323	$k =~ s/\.pm$//;
		2324	$k =~ s/\//::/g;
		2325
		2326	if (my $cb = $k->can ("unload_module")) {
		2327	$cb->();
		2328	}
		2329
		2330	Symbol::delete_package $k;
		2331	}
		2332
		2333	warn "get rid of safe::, as good as possible";
		2334	Symbol::delete_package "safe::$_"
		2335	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		2336
		2337	warn "unload cf.pm \"a bit\"";
		2338	delete $INC{"cf.pm"};
		2339
		2340	# don't, removes xs symbols, too,
		2341	# and global variables created in xs
		2342	#Symbol::delete_package __PACKAGE__;
		2343
		2344	warn "reloading cf.pm";
		2345	require cf;
		2346	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		2347
		2348	warn "load config and database again";
		2349	cf::cfg_load;
		2350	cf::db_load;
		2351
		2352	warn "load extensions";
		2353	cf::load_extensions;
		2354
		2355	warn "reattach attachments to objects/players";
		2356	_global_reattach;
		2357	warn "reattach attachments to maps";
		2358	reattach $_ for values %MAP;
		2359	};
		2360
		2361	if ($@) {
		2362	warn $@;
		2363	warn "error while reloading, exiting.";
		2364	exit 1;
		2365	}
		2366
		2367	warn "reloaded";
		2368	};
		2369
		2370	register_command "reload" => sub {
		2371	my ($who, $arg) = @_;
		2372
		2373	if ($who->flag (FLAG_WIZ)) {
		2374	$who->message ("start of reload.");
		2375	reload;
		2376	$who->message ("end of reload.");
		2377	}
		2378	};
534		2379
535	unshift @INC, $LIBDIR;	2380	unshift @INC, $LIBDIR;
536		2381
537	load_extensions;
538
539	$TICK_WATCHER = Event->timer (	2382	$TICK_WATCHER = Event->timer (
		2383	reentrant => 0,
540	prio => 1,	2384	prio => 0,
541	at => $NEXT_TICK || 1,	2385	at => $NEXT_TICK || $TICK,
		2386	data => WF_AUTOCANCEL,
542	cb => sub {	2387	cb => sub {
		2388	$NOW = Event::time;
		2389
543	cf::server_tick; # one server iteration	2390	cf::server_tick; # one server iteration
544		2391	$RUNTIME += $TICK;
545	my $NOW = Event::time;
546	$NEXT_TICK += $TICK;	2392	$NEXT_TICK += $TICK;
547		2393
548	# if we are delayed by > 0.25 second, skip ticks	2394	$WAIT_FOR_TICK->broadcast;
549	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + .25;	2395	$WAIT_FOR_TICK_ONE->send if $WAIT_FOR_TICK_ONE->awaited;
		2396
		2397	# if we are delayed by four ticks or more, skip them all
		2398	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
550		2399
551	$TICK_WATCHER->at ($NEXT_TICK);	2400	$TICK_WATCHER->at ($NEXT_TICK);
552	$TICK_WATCHER->start;	2401	$TICK_WATCHER->start;
553	},	2402	},
554	);	2403	);
555		2404
		2405	IO::AIO::max_poll_time $TICK * 0.2;
		2406
		2407	Event->io (
		2408	fd => IO::AIO::poll_fileno,
		2409	poll => 'r',
		2410	prio => 5,
		2411	data => WF_AUTOCANCEL,
		2412	cb => \&IO::AIO::poll_cb,
		2413	);
		2414
		2415	Event->timer (
		2416	data => WF_AUTOCANCEL,
		2417	after => 0,
		2418	interval => 10,
		2419	cb => sub {
		2420	(Coro::unblock_sub {
		2421	write_runtime
		2422	or warn "ERROR: unable to write runtime file: $!";
		2423	})->();
		2424	},
		2425	);
		2426
		2427	END { cf::emergency_save }
		2428
556	1	2429	1
557		2430

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