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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.57 by root, Wed Aug 30 11:21:24 2006 UTC vs.
Revision 1.104 by root, Sat Dec 30 16:56:16 2006 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
		19	use IO::AIO 2.3;
		20	use YAML::Syck ();
10	use Time::HiRes;	21	use Time::HiRes;
11	use Event;	22
12	$Event::Eval = 1; # no idea why this is required, but it is	23	use Event; $Event::Eval = 1; # no idea why this is required, but it is
13		24
14	use strict;	25	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		26	$YAML::Syck::ImplicitUnicode = 1;
15		27
16	_reload_1;	28	$Coro::main->prio (2); # run main coroutine ("the server") with very high priority
17		29
		30	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		31
18	our %COMMAND = ();	32	our %COMMAND = ();
		33	our %COMMAND_TIME = ();
		34	our %EXTCMD = ();
		35
19	our @EVENT;	36	our @EVENT;
20	our %PROP_TYPE;	37	our $LIBDIR = datadir . "/ext";
21	our %PROP_IDX;
22	our $LIBDIR = maps_directory "perl";
23		38
24	our $TICK = MAX_TIME * 1e-6;	39	our $TICK = MAX_TIME * 1e-6;
25	our $TICK_WATCHER;	40	our $TICK_WATCHER;
26	our $NEXT_TICK;	41	our $NEXT_TICK;
		42	our $NOW;
		43
		44	our %CFG;
		45
		46	our $UPTIME; $UPTIME ||= time;
		47	our $RUNTIME;
		48
		49	our %MAP; # all maps
		50	our $LINK_MAP; # the special {link} map
		51	our $FREEZE;
		52
		53	binmode STDOUT;
		54	binmode STDERR;
		55
		56	# read virtual server time, if available
		57	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		58	open my $fh, "<", cf::localdir . "/runtime"
		59	or die "unable to read runtime file: $!";
		60	$RUNTIME = <$fh> + 0.;
		61	}
		62
		63	mkdir cf::localdir;
		64	mkdir cf::localdir . "/" . cf::playerdir;
		65	mkdir cf::localdir . "/" . cf::tmpdir;
		66	mkdir cf::localdir . "/" . cf::uniquedir;
		67
		68	our %EXT_CORO;
		69
		70	#############################################################################
		71
		72	=head2 GLOBAL VARIABLES
		73
		74	=over 4
		75
		76	=item $cf::UPTIME
		77
		78	The timestamp of the server start (so not actually an uptime).
		79
		80	=item $cf::RUNTIME
		81
		82	The time this server has run, starts at 0 and is increased by $cf::TICK on
		83	every server tick.
		84
		85	=item $cf::LIBDIR
		86
		87	The perl library directory, where extensions and cf-specific modules can
		88	be found. It will be added to C<@INC> automatically.
		89
		90	=item $cf::NOW
		91
		92	The time of the last (current) server tick.
		93
		94	=item $cf::TICK
		95
		96	The interval between server ticks, in seconds.
		97
		98	=item %cf::CFG
		99
		100	Configuration for the server, loaded from C</etc/crossfire/config>, or
		101	from wherever your confdir points to.
		102
		103	=back
		104
		105	=cut
27		106
28	BEGIN {	107	BEGIN {
29	*CORE::GLOBAL::warn = sub {	108	*CORE::GLOBAL::warn = sub {
30	my $msg = join "", @_;	109	my $msg = join "", @_;
		110	utf8::encode $msg;
		111
31	$msg .= "\n"	112	$msg .= "\n"
32	unless $msg =~ /\n$/;	113	unless $msg =~ /\n$/;
33		114
34	print STDERR "cfperl: $msg";
35	LOG llevError, "cfperl: $msg";	115	LOG llevError, "cfperl: $msg";
36	};	116	};
37	}	117	}
38		118
39	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	119	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
40		120	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
41	# generate property mutators	121	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
42	sub prop_gen {	122	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
43	my ($prefix, $class) = @_;	123	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
44
45	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	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';	124	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
74		125
75	# we bless all objects into (empty) derived classes to force a method lookup	126	# we bless all objects into (empty) derived classes to force a method lookup
76	# within the Safe compartment.	127	# within the Safe compartment.
77	for my $pkg (qw(cf::object cf::object::player cf::player cf::map cf::party cf::region cf::arch cf::living)) {	128	for my $pkg (qw(
		129	cf::global cf::attachable
		130	cf::object cf::object::player
		131	cf::client cf::player
		132	cf::arch cf::living
		133	cf::map cf::party cf::region
		134	)) {
78	no strict 'refs';	135	no strict 'refs';
79	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	136	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
80	}	137	}
81		138
82	$Event::DIED = sub {	139	$Event::DIED = sub {
…		…
84	};	141	};
85		142
86	my %ext_pkg;	143	my %ext_pkg;
87	my @exts;	144	my @exts;
88	my @hook;	145	my @hook;
89	my %command;
90	my %extcmd;
91		146
92	#############################################################################	147	=head2 UTILITY FUNCTIONS
93	# utility functions	148
		149	=over 4
		150
		151	=cut
94		152
95	use JSON::Syck (); # TODO# replace by JSON::PC once working	153	use JSON::Syck (); # TODO# replace by JSON::PC once working
		154
		155	=item $ref = cf::from_json $json
		156
		157	Converts a JSON string into the corresponding perl data structure.
		158
		159	=cut
96		160
97	sub from_json($) {	161	sub from_json($) {
98	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs	162	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
99	JSON::Syck::Load $_[0]	163	JSON::Syck::Load $_[0]
100	}	164	}
101		165
		166	=item $json = cf::to_json $ref
		167
		168	Converts a perl data structure into its JSON representation.
		169
		170	=cut
		171
102	sub to_json($) {	172	sub to_json($) {
103	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs	173	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
104	JSON::Syck::Dump $_[0]	174	JSON::Syck::Dump $_[0]
105	}	175	}
106		176
		177	=item $coro = cf::coro { BLOCK }
		178
		179	Creates and returns a new coro. This coro is automcatially being canceled
		180	when the extension calling this is being unloaded.
		181
		182	=cut
		183
		184	sub coro(&) {
		185	my $cb = shift;
		186
		187	my $coro; $coro = async {
		188	eval {
		189	$cb->();
		190	};
		191	warn $@ if $@;
		192	};
		193
		194	$coro->on_destroy (sub {
		195	delete $EXT_CORO{$coro+0};
		196	});
		197	$EXT_CORO{$coro+0} = $coro;
		198
		199	$coro
		200	}
		201
		202	=back
		203
		204	=cut
		205
107	#############################################################################	206	#############################################################################
108	# "new" plug-in system
109		207
110	=head3 EVENTS AND OBJECT ATTACHMENTS	208	=head2 ATTACHABLE OBJECTS
		209
		210	Many objects in crossfire are so-called attachable objects. That means you can
		211	attach callbacks/event handlers (a collection of which is called an "attachment")
		212	to it. All such attachable objects support the following methods.
		213
		214	In the following description, CLASS can be any of C<global>, C<object>
		215	C<player>, C<client> or C<map> (i.e. the attachable objects in
		216	crossfire+).
111		217
112	=over 4	218	=over 4
113		219
114	=item $object->attach ($attachment, key => $value...)
115
116	=item $object->detach ($attachment)
117
118	Attach/detach a pre-registered attachment to an object.
119
120	=item $player->attach ($attachment, key => $value...)
121
122	=item $player->detach ($attachment)
123
124	Attach/detach a pre-registered attachment to a player.
125
126	=item $map->attach ($attachment, key => $value...)	220	=item $attachable->attach ($attachment, key => $value...)
127		221
128	=item $map->detach ($attachment)	222	=item $attachable->detach ($attachment)
129		223
130	Attach/detach a pre-registered attachment to a map.	224	Attach/detach a pre-registered attachment to a specific object and give it
		225	the specified key/value pairs as arguments.
131		226
132	=item $bool = $object->attached ($name)	227	Example, attach a minesweeper attachment to the given object, making it a
		228	10x10 minesweeper game:
133		229
134	=item $bool = $player->attached ($name)	230	$obj->attach (minesweeper => width => 10, height => 10);
135		231
136	=item $bool = $map->attached ($name)	232	=item $bool = $attachable->attached ($name)
137		233
138	Checks wether the named attachment is currently attached to the object.	234	Checks wether the named attachment is currently attached to the object.
139		235
140	=item cf::attach_global ...	236	=item cf::CLASS->attach ...
141		237
142	Attach handlers for global events.	238	=item cf::CLASS->detach ...
143		239
144	This and all following C<attach_*>-functions expect any number of the	240	Define an anonymous attachment and attach it to all objects of the given
145	following handler/hook descriptions:	241	CLASS. See the next function for an explanation of its arguments.
		242
		243	You can attach to global events by using the C<cf::global> class.
		244
		245	Example, log all player logins:
		246
		247	cf::player->attach (
		248	on_login => sub {
		249	my ($pl) = @_;
		250	...
		251	},
		252	);
		253
		254	Example, attach to the jeweler skill:
		255
		256	cf::object->attach (
		257	type => cf::SKILL,
		258	subtype => cf::SK_JEWELER,
		259	on_use_skill => sub {
		260	my ($sk, $ob, $part, $dir, $msg) = @_;
		261	...
		262	},
		263	);
		264
		265	=item cf::CLASS::attachment $name, ...
		266
		267	Register an attachment by C<$name> through which attachable objects of the
		268	given CLASS can refer to this attachment.
		269
		270	Some classes such as crossfire maps and objects can specify attachments
		271	that are attached at load/instantiate time, thus the need for a name.
		272
		273	These calls expect any number of the following handler/hook descriptions:
146		274
147	=over 4	275	=over 4
148		276
149	=item prio => $number	277	=item prio => $number
150		278
…		…
152	by another C<prio> setting). Lower priority handlers get executed	280	by another C<prio> setting). Lower priority handlers get executed
153	earlier. The default priority is C<0>, and many built-in handlers are	281	earlier. The default priority is C<0>, and many built-in handlers are
154	registered at priority C<-1000>, so lower priorities should not be used	282	registered at priority C<-1000>, so lower priorities should not be used
155	unless you know what you are doing.	283	unless you know what you are doing.
156		284
		285	=item type => $type
		286
		287	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		288	given type of objects only (the additional parameter C<subtype> can be
		289	used to further limit to the given subtype).
		290
157	=item on_I<event> => \&cb	291	=item on_I<event> => \&cb
158		292
159	Call the given code reference whenever the named event happens (event is	293	Call the given code reference whenever the named event happens (event is
160	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which	294	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
161	handlers are recognised generally depends on the type of object these	295	handlers are recognised generally depends on the type of object these
…		…
170	package and register them. Only handlers for eevents supported by the	304	package and register them. Only handlers for eevents supported by the
171	object/class are recognised.	305	object/class are recognised.
172		306
173	=back	307	=back
174		308
175	=item cf::attach_to_type $object_type, $subtype, ...	309	Example, define an attachment called "sockpuppet" that calls the given
		310	event handler when a monster attacks:
176		311
177	Attach handlers for a specific object type (e.g. TRANSPORT) and	312	cf::object::attachment sockpuppet =>
178	subtype. If C<$subtype> is zero or undef, matches all objects of the given	313	on_skill_attack => sub {
179	type.	314	my ($self, $victim) = @_;
180		315	...
181	=item cf::attach_to_objects ...
182
183	Attach handlers to all objects. Do not use this except for debugging or
184	very rare events, as handlers are (obviously) called for I<all> objects in
185	the game.
186
187	=item cf::attach_to_players ...
188
189	Attach handlers to all players.
190
191	=item cf::attach_to_maps ...
192
193	Attach handlers to all maps.
194
195	=item cf:register_attachment $name, ...
196
197	Register an attachment by name through which objects can refer to this
198	attachment.
199
200	=item cf:register_player_attachment $name, ...
201
202	Register an attachment by name through which players can refer to this
203	attachment.
204
205	=item cf:register_map_attachment $name, ...
206
207	Register an attachment by name through which maps can refer to this
208	attachment.
209
210	=cut
211
212	# the following variables are defined in .xs and must not be re-created
213	our @CB_GLOBAL = (); # registry for all global events
214	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
215	our @CB_PLAYER = ();
216	our @CB_TYPE = (); # registry for type (cf-object class) based events
217	our @CB_MAP = ();
218
219	my %attachment;
220
221	sub _attach_cb($\%$$$) {
222	my ($registry, $undo, $event, $prio, $cb) = @_;
223
224	use sort 'stable';
225
226	$cb = [$prio, $cb];
227
228	@{$registry->[$event]} = sort
229	{ $a->[0] cmp $b->[0] }
230	@{$registry->[$event] || []}, $cb;
231
232	push @{$undo->{cb}}, [$event, $cb];
233	}
234
235	# attach handles attaching event callbacks
236	# the only thing the caller has to do is pass the correct
237	# registry (== where the callback attaches to).
238	sub _attach(\@$@) {
239	my ($registry, $klass, @arg) = @_;
240
241	my $prio = 0;
242
243	my %undo = (
244	registry => $registry,
245	cb => [],
246	);
247
248	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
249
250	while (@arg) {
251	my $type = shift @arg;
252
253	if ($type eq "prio") {
254	$prio = shift @arg;
255
256	} elsif ($type eq "package") {
257	my $pkg = shift @arg;
258
259	while (my ($name, $id) = each %cb_id) {
260	if (my $cb = $pkg->can ($name)) {
261	_attach_cb $registry, %undo, $id, $prio, $cb;
262	}
263	}	316	}
264
265	} elsif (exists $cb_id{$type}) {
266	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;
267
268	} elsif (ref $type) {
269	warn "attaching objects not supported, ignoring.\n";
270
271	} else {
272	shift @arg;
273	warn "attach argument '$type' not supported, ignoring.\n";
274	}
275	}
276
277	\%undo
278	}
279
280	sub _attach_attachment {
281	my ($obj, $name, %arg) = @_;
282
283	return if exists $obj->{_attachment}{$name};
284
285	my $res;
286
287	if (my $attach = $attachment{$name}) {
288	my $registry = $obj->registry;
289
290	for (@$attach) {
291	my ($klass, @attach) = @$_;
292	$res = _attach @$registry, $klass, @attach;
293	}
294
295	$obj->{$name} = \%arg;
296	} else {
297	warn "object uses attachment '$name' that is not available, postponing.\n";
298	}
299
300	$obj->{_attachment}{$name} = undef;
301
302	$res->{attachment} = $name;
303	$res
304	}
305
306	*cf::object::attach =
307	*cf::player::attach =
308	*cf::map::attach = sub {
309	my ($obj, $name, %arg) = @_;
310
311	_attach_attachment $obj, $name, %arg;
312	};
313
314	# all those should be optimised
315	*cf::object::detach =
316	*cf::player::detach =
317	*cf::map::detach = sub {
318	my ($obj, $name) = @_;
319
320	delete $obj->{_attachment}{$name};
321	reattach ($obj);
322	};
323
324	*cf::object::attached =
325	*cf::player::attached =
326	*cf::map::attached = sub {
327	my ($obj, $name) = @_;
328
329	exists $obj->{_attachment}{$name}
330	};
331
332	sub attach_global {
333	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
334	}
335
336	sub attach_to_type {
337	my $type = shift;
338	my $subtype = shift;
339
340	_attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_
341	}
342
343	sub attach_to_objects {
344	_attach @CB_OBJECT, KLASS_OBJECT, @_
345	}
346
347	sub attach_to_players {
348	_attach @CB_PLAYER, KLASS_PLAYER, @_
349	}
350
351	sub attach_to_maps {
352	_attach @CB_MAP, KLASS_MAP, @_
353	}
354
355	sub register_attachment {
356	my $name = shift;
357
358	$attachment{$name} = [[KLASS_OBJECT, @_]];
359	}
360
361	sub register_player_attachment {
362	my $name = shift;
363
364	$attachment{$name} = [[KLASS_PLAYER, @_]];
365	}
366
367	sub register_map_attachment {
368	my $name = shift;
369
370	$attachment{$name} = [[KLASS_MAP, @_]];
371	}
372
373	our $override;
374	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
375
376	sub override {
377	$override = 1;
378	@invoke_results = ();
379	}
380
381	sub do_invoke {
382	my $event = shift;
383	my $callbacks = shift;
384
385	@invoke_results = ();
386
387	local $override;
388
389	for (@$callbacks) {
390	eval { &{$_->[1]} };
391
392	if ($@) {
393	warn "$@";
394	warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";
395	override;
396	}
397
398	return 1 if $override;
399	}
400
401	0	317	}
402	}
403		318
404	=item $bool = cf::invoke EVENT_GLOBAL_XXX, ...	319	=item $attachable->valid
405
406	=item $bool = $object->invoke (EVENT_OBJECT_XXX, ...)
407
408	=item $bool = $player->invoke (EVENT_PLAYER_XXX, ...)
409
410	=item $bool = $map->invoke (EVENT_MAP_XXX, ...)
411
412	Generate a global/object/player/map-specific event with the given arguments.
413
414	This API is preliminary (most likely, the EVENT_KLASS_xxx prefix will be
415	removed in future versions), and there is no public API to access override
416	results (if you must, access C<@cf::invoke_results> directly).
417
418	=back
419
420	=head2 methods valid for all pointers
421
422	=over 4
423
424	=item $object->valid
425
426	=item $player->valid
427
428	=item $map->valid
429		320
430	Just because you have a perl object does not mean that the corresponding	321	Just because you have a perl object does not mean that the corresponding
431	C-level object still exists. If you try to access an object that has no	322	C-level object still exists. If you try to access an object that has no
432	valid C counterpart anymore you get an exception at runtime. This method	323	valid C counterpart anymore you get an exception at runtime. This method
433	can be used to test for existence of the C object part without causing an	324	can be used to test for existence of the C object part without causing an
434	exception.	325	exception.
435		326
		327	=cut
		328
		329	# the following variables are defined in .xs and must not be re-created
		330	our @CB_GLOBAL = (); # registry for all global events
		331	our @CB_ATTACHABLE = (); # registry for all attachables
		332	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		333	our @CB_PLAYER = ();
		334	our @CB_CLIENT = ();
		335	our @CB_TYPE = (); # registry for type (cf-object class) based events
		336	our @CB_MAP = ();
		337
		338	my %attachment;
		339
		340	sub _attach_cb($$$$) {
		341	my ($registry, $event, $prio, $cb) = @_;
		342
		343	use sort 'stable';
		344
		345	$cb = [$prio, $cb];
		346
		347	@{$registry->[$event]} = sort
		348	{ $a->[0] cmp $b->[0] }
		349	@{$registry->[$event] || []}, $cb;
		350	}
		351
		352	# hack
		353	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		354
		355	# attach handles attaching event callbacks
		356	# the only thing the caller has to do is pass the correct
		357	# registry (== where the callback attaches to).
		358	sub _attach {
		359	my ($registry, $klass, @arg) = @_;
		360
		361	my $object_type;
		362	my $prio = 0;
		363	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		364
		365	#TODO: get rid of this hack
		366	if ($attachable_klass{$klass}) {
		367	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		368	}
		369
		370	while (@arg) {
		371	my $type = shift @arg;
		372
		373	if ($type eq "prio") {
		374	$prio = shift @arg;
		375
		376	} elsif ($type eq "type") {
		377	$object_type = shift @arg;
		378	$registry = $CB_TYPE[$object_type] ||= [];
		379
		380	} elsif ($type eq "subtype") {
		381	defined $object_type or Carp::croak "subtype specified without type";
		382	my $object_subtype = shift @arg;
		383	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		384
		385	} elsif ($type eq "package") {
		386	my $pkg = shift @arg;
		387
		388	while (my ($name, $id) = each %cb_id) {
		389	if (my $cb = $pkg->can ($name)) {
		390	_attach_cb $registry, $id, $prio, $cb;
		391	}
		392	}
		393
		394	} elsif (exists $cb_id{$type}) {
		395	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		396
		397	} elsif (ref $type) {
		398	warn "attaching objects not supported, ignoring.\n";
		399
		400	} else {
		401	shift @arg;
		402	warn "attach argument '$type' not supported, ignoring.\n";
		403	}
		404	}
		405	}
		406
		407	sub _object_attach {
		408	my ($obj, $name, %arg) = @_;
		409
		410	return if exists $obj->{_attachment}{$name};
		411
		412	if (my $attach = $attachment{$name}) {
		413	my $registry = $obj->registry;
		414
		415	for (@$attach) {
		416	my ($klass, @attach) = @$_;
		417	_attach $registry, $klass, @attach;
		418	}
		419
		420	$obj->{$name} = \%arg;
		421	} else {
		422	warn "object uses attachment '$name' that is not available, postponing.\n";
		423	}
		424
		425	$obj->{_attachment}{$name} = undef;
		426	}
		427
		428	sub cf::attachable::attach {
		429	if (ref $_[0]) {
		430	_object_attach @_;
		431	} else {
		432	_attach shift->_attach_registry, @_;
		433	}
		434	};
		435
		436	# all those should be optimised
		437	sub cf::attachable::detach {
		438	my ($obj, $name) = @_;
		439
		440	if (ref $obj) {
		441	delete $obj->{_attachment}{$name};
		442	reattach ($obj);
		443	} else {
		444	Carp::croak "cannot, currently, detach class attachments";
		445	}
		446	};
		447
		448	sub cf::attachable::attached {
		449	my ($obj, $name) = @_;
		450
		451	exists $obj->{_attachment}{$name}
		452	}
		453
		454	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		455	eval "#line " . __LINE__ . " 'cf.pm'
		456	sub cf::\L$klass\E::_attach_registry {
		457	(\\\@CB_$klass, KLASS_$klass)
		458	}
		459
		460	sub cf::\L$klass\E::attachment {
		461	my \$name = shift;
		462
		463	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		464	}
		465	";
		466	die if $@;
		467	}
		468
		469	our $override;
		470	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		471
		472	sub override {
		473	$override = 1;
		474	@invoke_results = ();
		475	}
		476
		477	sub do_invoke {
		478	my $event = shift;
		479	my $callbacks = shift;
		480
		481	@invoke_results = ();
		482
		483	local $override;
		484
		485	for (@$callbacks) {
		486	eval { &{$_->[1]} };
		487
		488	if ($@) {
		489	warn "$@";
		490	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		491	override;
		492	}
		493
		494	return 1 if $override;
		495	}
		496
		497	0
		498	}
		499
		500	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		501
		502	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		503
		504	Generate an object-specific event with the given arguments.
		505
		506	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		507	removed in future versions), and there is no public API to access override
		508	results (if you must, access C<@cf::invoke_results> directly).
		509
436	=back	510	=back
437		511
438	=cut	512	=cut
439
440	*cf::object::valid =
441	*cf::player::valid =
442	*cf::map::valid = \&cf::_valid;
443		513
444	#############################################################################	514	#############################################################################
445	# object support	515	# object support
446		516
447	sub instantiate {
448	my ($obj, $data) = @_;
449
450	$data = from_json $data;
451
452	for (@$data) {
453	my ($name, $args) = @$_;
454
455	$obj->attach ($name, %{$args || {} });
456	}
457	}
458
459	# basically do the same as instantiate, without calling instantiate
460	sub reattach {	517	sub reattach {
		518	# basically do the same as instantiate, without calling instantiate
461	my ($obj) = @_;	519	my ($obj) = @_;
		520
462	my $registry = $obj->registry;	521	my $registry = $obj->registry;
463		522
464	@$registry = ();	523	@$registry = ();
465		524
466	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };	525	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
467		526
468	for my $name (keys %{ $obj->{_attachment} || {} }) {	527	for my $name (keys %{ $obj->{_attachment} || {} }) {
469	if (my $attach = $attachment{$name}) {	528	if (my $attach = $attachment{$name}) {
470	for (@$attach) {	529	for (@$attach) {
471	my ($klass, @attach) = @$_;	530	my ($klass, @attach) = @$_;
472	_attach @$registry, $klass, @attach;	531	_attach $registry, $klass, @attach;
473	}	532	}
474	} else {	533	} else {
475	warn "object uses attachment '$name' that is not available, postponing.\n";	534	warn "object uses attachment '$name' that is not available, postponing.\n";
476	}	535	}
477	}	536	}
478	}	537	}
479		538
480	sub object_freezer_save {	539	cf::attachable->attach (
481	my ($filename, $objs) = @_;
482
483	if (@$objs) {
484	open my $fh, ">:raw", "$filename.pst~";
485	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
486	close $fh;
487	unlink "$filename.cfperl";
488	chmod SAVE_MODE, "$filename.pst~";
489	rename "$filename.pst~", "$filename.pst";
490	} else {
491	unlink "$filename.pst";
492	}
493
494	chmod SAVE_MODE, "$filename~";
495	rename "$filename~", $filename;
496	}
497
498	sub object_thawer_load {
499	my ($filename) = @_;
500
501	open my $fh, "<:raw:perlio", "$filename.pst"
502	or return;
503
504	eval { local $/; (Storable::thaw <$fh>)->{objs} }
505	}
506
507	attach_to_objects
508	prio => -1000000,	540	prio => -1000000,
		541	on_instantiate => sub {
		542	my ($obj, $data) = @_;
		543
		544	$data = from_json $data;
		545
		546	for (@$data) {
		547	my ($name, $args) = @$_;
		548
		549	$obj->attach ($name, %{$args || {} });
		550	}
		551	},
		552	on_reattach => \&reattach,
509	on_clone => sub {	553	on_clone => sub {
510	my ($src, $dst) = @_;	554	my ($src, $dst) = @_;
511		555
512	@{$dst->registry} = @{$src->registry};	556	@{$dst->registry} = @{$src->registry};
513		557
514	%$dst = %$src;	558	%$dst = %$src;
515		559
516	%{$dst->{_attachment}} = %{$src->{_attachment}}	560	%{$dst->{_attachment}} = %{$src->{_attachment}}
517	if exists $src->{_attachment};	561	if exists $src->{_attachment};
518	},	562	},
519	;	563	);
		564
		565	sub object_freezer_save {
		566	my ($filename, $rdata, $objs) = @_;
		567
		568	if (length $$rdata) {
		569	warn sprintf "saving %s (%d,%d)\n",
		570	$filename, length $$rdata, scalar @$objs;
		571
		572	if (open my $fh, ">:raw", "$filename~") {
		573	chmod SAVE_MODE, $fh;
		574	syswrite $fh, $$rdata;
		575	close $fh;
		576
		577	if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
		578	chmod SAVE_MODE, $fh;
		579	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
		580	close $fh;
		581	rename "$filename.pst~", "$filename.pst";
		582	} else {
		583	unlink "$filename.pst";
		584	}
		585
		586	rename "$filename~", $filename;
		587	} else {
		588	warn "FATAL: $filename~: $!\n";
		589	}
		590	} else {
		591	unlink $filename;
		592	unlink "$filename.pst";
		593	}
		594	}
		595
		596	sub object_freezer_as_string {
		597	my ($rdata, $objs) = @_;
		598
		599	use Data::Dumper;
		600
		601	$$rdata . Dumper $objs
		602	}
		603
		604	sub object_thawer_load {
		605	my ($filename) = @_;
		606
		607	local $/;
		608
		609	my $av;
		610
		611	#TODO: use sysread etc.
		612	if (open my $data, "<:raw:perlio", $filename) {
		613	$data = <$data>;
		614	if (open my $pst, "<:raw:perlio", "$filename.pst") {
		615	$av = eval { (Storable::thaw <$pst>)->{objs} };
		616	}
		617	return ($data, $av);
		618	}
		619
		620	()
		621	}
520		622
521	#############################################################################	623	#############################################################################
522	# old plug-in events	624	# command handling &c
523		625
524	sub inject_event {	626	=item cf::register_command $name => \&callback($ob,$args);
525	my $extension = shift;
526	my $event_code = shift;
527		627
528	my $cb = $hook[$event_code]{$extension}	628	Register a callback for execution when the client sends the user command
529	or return;	629	$name.
530		630
531	&$cb	631	=cut
532	}
533
534	sub inject_global_event {
535	my $event = shift;
536
537	my $cb = $hook[$event]
538	or return;
539
540	List::Util::max map &$_, values %$cb
541	}
542
543	sub inject_command {
544	my ($name, $obj, $params) = @_;
545
546	for my $cmd (@{ $command{$name} }) {
547	$cmd->[1]->($obj, $params);
548	}
549
550	-1
551	}
552		632
553	sub register_command {	633	sub register_command {
554	my ($name, $time, $cb) = @_;	634	my ($name, $cb) = @_;
555		635
556	my $caller = caller;	636	my $caller = caller;
557	#warn "registering command '$name/$time' to '$caller'";	637	#warn "registering command '$name/$time' to '$caller'";
558		638
559	push @{ $command{$name} }, [$time, $cb, $caller];	639	push @{ $COMMAND{$name} }, [$caller, $cb];
560	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
561	}	640	}
		641
		642	=item cf::register_extcmd $name => \&callback($pl,$packet);
		643
		644	Register a callbackf ro execution when the client sends an extcmd packet.
		645
		646	If the callback returns something, it is sent back as if reply was being
		647	called.
		648
		649	=cut
562		650
563	sub register_extcmd {	651	sub register_extcmd {
564	my ($name, $cb) = @_;	652	my ($name, $cb) = @_;
565		653
566	my $caller = caller;	654	my $caller = caller;
567	#warn "registering extcmd '$name' to '$caller'";	655	#warn "registering extcmd '$name' to '$caller'";
568		656
569	$extcmd{$name} = [$cb, $caller];	657	$EXTCMD{$name} = [$cb, $caller];
570	}	658	}
		659
		660	cf::player->attach (
		661	on_command => sub {
		662	my ($pl, $name, $params) = @_;
		663
		664	my $cb = $COMMAND{$name}
		665	or return;
		666
		667	for my $cmd (@$cb) {
		668	$cmd->[1]->($pl->ob, $params);
		669	}
		670
		671	cf::override;
		672	},
		673	on_extcmd => sub {
		674	my ($pl, $buf) = @_;
		675
		676	my $msg = eval { from_json $buf };
		677
		678	if (ref $msg) {
		679	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		680	if (my %reply = $cb->[0]->($pl, $msg)) {
		681	$pl->ext_reply ($msg->{msgid}, %reply);
		682	}
		683	}
		684	} else {
		685	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		686	}
		687
		688	cf::override;
		689	},
		690	);
571		691
572	sub register {	692	sub register {
573	my ($base, $pkg) = @_;	693	my ($base, $pkg) = @_;
574		694
575	#TODO	695	#TODO
…		…
594	. "#line 1 \"$path\"\n{\n"	714	. "#line 1 \"$path\"\n{\n"
595	. (do { local $/; <$fh> })	715	. (do { local $/; <$fh> })
596	. "\n};\n1";	716	. "\n};\n1";
597		717
598	eval $source	718	eval $source
599	or die "$path: $@";	719	or die $@ ? "$path: $@\n"
		720	: "extension disabled.\n";
600		721
601	push @exts, $pkg;	722	push @exts, $pkg;
602	$ext_pkg{$base} = $pkg;	723	$ext_pkg{$base} = $pkg;
603		724
604	# no strict 'refs';	725	# no strict 'refs';
…		…
617	# for my $idx (0 .. $#PLUGIN_EVENT) {	738	# for my $idx (0 .. $#PLUGIN_EVENT) {
618	# delete $hook[$idx]{$pkg};	739	# delete $hook[$idx]{$pkg};
619	# }	740	# }
620		741
621	# remove commands	742	# remove commands
622	for my $name (keys %command) {	743	for my $name (keys %COMMAND) {
623	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	744	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
624		745
625	if (@cb) {	746	if (@cb) {
626	$command{$name} = \@cb;	747	$COMMAND{$name} = \@cb;
627	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
628	} else {	748	} else {
629	delete $command{$name};
630	delete $COMMAND{"$name\000"};	749	delete $COMMAND{$name};
631	}	750	}
632	}	751	}
633		752
634	# remove extcmds	753	# remove extcmds
635	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	754	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
636	delete $extcmd{$name};	755	delete $EXTCMD{$name};
637	}	756	}
638		757
639	if (my $cb = $pkg->can ("unload")) {	758	if (my $cb = $pkg->can ("unload")) {
640	eval {	759	eval {
641	$cb->($pkg);	760	$cb->($pkg);
…		…
645		764
646	Symbol::delete_package $pkg;	765	Symbol::delete_package $pkg;
647	}	766	}
648		767
649	sub load_extensions {	768	sub load_extensions {
650	my $LIBDIR = maps_directory "perl";
651
652	for my $ext (<$LIBDIR/*.ext>) {	769	for my $ext (<$LIBDIR/*.ext>) {
653	next unless -r $ext;	770	next unless -r $ext;
654	eval {	771	eval {
655	load_extension $ext;	772	load_extension $ext;
656	1	773	1
657	} or warn "$ext not loaded: $@";	774	} or warn "$ext not loaded: $@";
658	}	775	}
659	}	776	}
660		777
661	sub _perl_reload(&) {
662	my ($msg) = @_;
663
664	$msg->("reloading...");
665
666	eval {
667	# 1. cancel all watchers
668	$_->cancel for Event::all_watchers;
669
670	# 2. unload all extensions
671	for (@exts) {
672	$msg->("unloading <$_>");
673	unload_extension $_;
674	}
675
676	# 3. unload all modules loaded from $LIBDIR
677	while (my ($k, $v) = each %INC) {
678	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
679
680	$msg->("removing <$k>");
681	delete $INC{$k};
682
683	$k =~ s/\.pm$//;
684	$k =~ s/\//::/g;
685
686	if (my $cb = $k->can ("unload_module")) {
687	$cb->();
688	}
689
690	Symbol::delete_package $k;
691	}
692
693	# 4. get rid of safe::, as good as possible
694	Symbol::delete_package "safe::$_"
695	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
696
697	# 5. remove register_script_function callbacks
698	# TODO
699
700	# 6. unload cf.pm "a bit"
701	delete $INC{"cf.pm"};
702
703	# don't, removes xs symbols, too,
704	# and global variables created in xs
705	#Symbol::delete_package __PACKAGE__;
706
707	# 7. reload cf.pm
708	$msg->("reloading cf.pm");
709	require cf;
710	};
711	$msg->($@) if $@;
712
713	$msg->("reloaded");
714	};
715
716	sub perl_reload() {
717	_perl_reload {
718	warn $_[0];
719	print "$_[0]\n";
720	};
721	}
722
723	register_command "perl-reload", 0, sub {
724	my ($who, $arg) = @_;
725
726	if ($who->flag (FLAG_WIZ)) {
727	_perl_reload {
728	warn $_[0];
729	$who->message ($_[0]);
730	};
731	}
732	};
733
734	#############################################################################
735	# extcmd framework, basically convert ext <msg>
736	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
737
738	attach_to_players
739	on_extcmd => sub {
740	my ($pl, $buf) = @_;
741
742	my $msg = eval { from_json $buf };
743
744	if (ref $msg) {
745	if (my $cb = $extcmd{$msg->{msgtype}}) {
746	if (my %reply = $cb->[0]->($pl, $msg)) {
747	$pl->ext_reply ($msg->{msgid}, %reply);
748	}
749	}
750	} else {
751	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
752	}
753
754	cf::override;
755	},
756	;
757
758	#############################################################################	778	#############################################################################
759	# load/save/clean perl data associated with a map	779	# load/save/clean perl data associated with a map
760		780
761	*cf::mapsupport::on_clean = sub {	781	*cf::mapsupport::on_clean = sub {
762	my ($map) = @_;	782	my ($map) = @_;
…		…
765	defined $path or return;	785	defined $path or return;
766		786
767	unlink "$path.pst";	787	unlink "$path.pst";
768	};	788	};
769		789
770	# old style persistent data, TODO: remove #d#
771	*cf::mapsupport::on_swapin = sub {
772	my ($map) = @_;
773
774	my $path = $map->tmpname;
775	$path = $map->path unless defined $path;
776
777	open my $fh, "<:raw", "$path.cfperl"
778	or return; # no perl data
779
780	my $data = Storable::thaw do { local $/; <$fh> };
781
782	$data->{version} <= 1
783	or return; # too new
784
785	$map->_set_obs ($data->{obs});
786	$map->invoke (EVENT_MAP_UPGRADE);
787	};
788
789	attach_to_maps prio => -10000, package => cf::mapsupport::;	790	cf::map->attach (prio => -10000, package => cf::mapsupport::);
790		791
791	#############################################################################	792	#############################################################################
792	# load/save perl data associated with player->ob objects	793	# load/save perl data associated with player->ob objects
793		794
794	sub all_objects(@) {	795	sub all_objects(@) {
795	@_, map all_objects ($_->inv), @_	796	@_, map all_objects ($_->inv), @_
796	}	797	}
797		798
798	attach_to_players	799	# TODO: compatibility cruft, remove when no longer needed
		800	cf::player->attach (
799	on_load => sub {	801	on_load => sub {
800	my ($pl, $path) = @_;	802	my ($pl, $path) = @_;
801		803
802	for my $o (all_objects $pl->ob) {	804	for my $o (all_objects $pl->ob) {
803	if (my $value = $o->get_ob_key_value ("_perl_data")) {	805	if (my $value = $o->get_ob_key_value ("_perl_data")) {
…		…
805		807
806	%$o = %{ Storable::thaw pack "H*", $value };	808	%$o = %{ Storable::thaw pack "H*", $value };
807	}	809	}
808	}	810	}
809	},	811	},
810	;	812	);
811		813
812	#############################################################################	814	#############################################################################
813	# core extensions - in perl	815
		816	=head2 CORE EXTENSIONS
		817
		818	Functions and methods that extend core crossfire objects.
		819
		820	=head3 cf::player
		821
		822	=over 4
814		823
815	=item cf::player::exists $login	824	=item cf::player::exists $login
816		825
817	Returns true when the given account exists.	826	Returns true when the given account exists.
818		827
…		…
821	sub cf::player::exists($) {	830	sub cf::player::exists($) {
822	cf::player::find $_[0]	831	cf::player::find $_[0]
823	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	832	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
824	}	833	}
825		834
		835	=item $player->ext_reply ($msgid, $msgtype, %msg)
		836
		837	Sends an ext reply to the player.
		838
		839	=cut
		840
		841	sub cf::player::ext_reply($$$%) {
		842	my ($self, $id, %msg) = @_;
		843
		844	$msg{msgid} = $id;
		845
		846	$self->send ("ext " . to_json \%msg);
		847	}
		848
		849	=back
		850
		851	=head3 cf::object::player
		852
		853	=over 4
		854
826	=item $player->reply ($npc, $msg[, $flags])	855	=item $player_object->reply ($npc, $msg[, $flags])
827		856
828	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	857	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
829	can be C<undef>. Does the right thing when the player is currently in a	858	can be C<undef>. Does the right thing when the player is currently in a
830	dialogue with the given NPC character.	859	dialogue with the given NPC character.
831		860
832	=cut	861	=cut
833		862
834	# rough implementation of a future "reply" method that works	863	# rough implementation of a future "reply" method that works
835	# with dialog boxes.	864	# with dialog boxes.
		865	#TODO: the first argument must go, split into a $npc->reply_to ( method
836	sub cf::object::player::reply($$$;$) {	866	sub cf::object::player::reply($$$;$) {
837	my ($self, $npc, $msg, $flags) = @_;	867	my ($self, $npc, $msg, $flags) = @_;
838		868
839	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	869	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
840		870
…		…
844	$msg = $npc->name . " says: $msg" if $npc;	874	$msg = $npc->name . " says: $msg" if $npc;
845	$self->message ($msg, $flags);	875	$self->message ($msg, $flags);
846	}	876	}
847	}	877	}
848		878
849	=item $player->ext_reply ($msgid, $msgtype, %msg)	879	=item $player_object->may ("access")
850		880
851	Sends an ext reply to the player.	881	Returns wether the given player is authorized to access resource "access"
		882	(e.g. "command_wizcast").
852		883
853	=cut	884	=cut
854		885
855	sub cf::player::ext_reply($$$%) {	886	sub cf::object::player::may {
		887	my ($self, $access) = @_;
		888
		889	$self->flag (cf::FLAG_WIZ) ||
		890	(ref $cf::CFG{"may_$access"}
		891	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		892	: $cf::CFG{"may_$access"})
		893	}
		894
		895	=head3 cf::client
		896
		897	=over 4
		898
		899	=item $client->send_drawinfo ($text, $flags)
		900
		901	Sends a drawinfo packet to the client. Circumvents output buffering so
		902	should not be used under normal circumstances.
		903
		904	=cut
		905
		906	sub cf::client::send_drawinfo {
		907	my ($self, $text, $flags) = @_;
		908
		909	utf8::encode $text;
		910	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		911	}
		912
		913
		914	=item $success = $client->query ($flags, "text", \&cb)
		915
		916	Queues a query to the client, calling the given callback with
		917	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		918	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		919
		920	Queries can fail, so check the return code. Or don't, as queries will become
		921	reliable at some point in the future.
		922
		923	=cut
		924
		925	sub cf::client::query {
		926	my ($self, $flags, $text, $cb) = @_;
		927
		928	return unless $self->state == ST_PLAYING
		929	|| $self->state == ST_SETUP
		930	|| $self->state == ST_CUSTOM;
		931
		932	$self->state (ST_CUSTOM);
		933
		934	utf8::encode $text;
		935	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		936
		937	$self->send_packet ($self->{query_queue}[0][0])
		938	if @{ $self->{query_queue} } == 1;
		939	}
		940
		941	cf::client->attach (
		942	on_reply => sub {
		943	my ($ns, $msg) = @_;
		944
		945	# this weird shuffling is so that direct followup queries
		946	# get handled first
		947	my $queue = delete $ns->{query_queue};
		948
		949	(shift @$queue)->[1]->($msg);
		950
		951	push @{ $ns->{query_queue} }, @$queue;
		952
		953	if (@{ $ns->{query_queue} } == @$queue) {
		954	if (@$queue) {
		955	$ns->send_packet ($ns->{query_queue}[0][0]);
		956	} else {
		957	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		958	}
		959	}
		960	},
		961	);
		962
		963	=item $client->coro (\&cb)
		964
		965	Create a new coroutine, running the specified callback. The coroutine will
		966	be automatically cancelled when the client gets destroyed (e.g. on logout,
		967	or loss of connection).
		968
		969	=cut
		970
		971	sub cf::client::coro {
856	my ($self, $id, %msg) = @_;	972	my ($self, $cb) = @_;
857		973
858	$msg{msgid} = $id;	974	my $coro; $coro = async {
		975	eval {
		976	$cb->();
		977	};
		978	warn $@ if $@;
		979	};
859		980
860	$self->send ("ext " . to_json \%msg);	981	$coro->on_destroy (sub {
861	}	982	delete $self->{_coro}{$coro+0};
		983	});
862		984
863	#############################################################################	985	$self->{_coro}{$coro+0} = $coro;
864	# map scripting support	986
		987	$coro
		988	}
		989
		990	cf::client->attach (
		991	on_destroy => sub {
		992	my ($ns) = @_;
		993
		994	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		995	},
		996	);
		997
		998	=back
		999
		1000
		1001	=head2 SAFE SCRIPTING
		1002
		1003	Functions that provide a safe environment to compile and execute
		1004	snippets of perl code without them endangering the safety of the server
		1005	itself. Looping constructs, I/O operators and other built-in functionality
		1006	is not available in the safe scripting environment, and the number of
		1007	functions and methods that can be called is greatly reduced.
		1008
		1009	=cut
865		1010
866	our $safe = new Safe "safe";	1011	our $safe = new Safe "safe";
867	our $safe_hole = new Safe::Hole;	1012	our $safe_hole = new Safe::Hole;
868		1013
869	$SIG{FPE} = 'IGNORE';	1014	$SIG{FPE} = 'IGNORE';
870		1015
871	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	1016	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
872		1017
873	# here we export the classes and methods available to script code	1018	# here we export the classes and methods available to script code
874		1019
		1020	=pod
		1021
		1022	The following fucntions and emthods are available within a safe environment:
		1023
		1024	cf::object contr pay_amount pay_player map
		1025	cf::object::player player
		1026	cf::player peaceful
		1027	cf::map trigger
		1028
		1029	=cut
		1030
875	for (	1031	for (
876	["cf::object" => qw(contr pay_amount pay_player)],	1032	["cf::object" => qw(contr pay_amount pay_player map)],
877	["cf::object::player" => qw(player)],	1033	["cf::object::player" => qw(player)],
878	["cf::player" => qw(peaceful)],	1034	["cf::player" => qw(peaceful)],
		1035	["cf::map" => qw(trigger)],
879	) {	1036	) {
880	no strict 'refs';	1037	no strict 'refs';
881	my ($pkg, @funs) = @$_;	1038	my ($pkg, @funs) = @$_;
882	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	1039	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
883	for @funs;	1040	for @funs;
884	}	1041	}
		1042
		1043	=over 4
		1044
		1045	=item @retval = safe_eval $code, [var => value, ...]
		1046
		1047	Compiled and executes the given perl code snippet. additional var/value
		1048	pairs result in temporary local (my) scalar variables of the given name
		1049	that are available in the code snippet. Example:
		1050
		1051	my $five = safe_eval '$first + $second', first => 1, second => 4;
		1052
		1053	=cut
885		1054
886	sub safe_eval($;@) {	1055	sub safe_eval($;@) {
887	my ($code, %vars) = @_;	1056	my ($code, %vars) = @_;
888		1057
889	my $qcode = $code;	1058	my $qcode = $code;
…		…
912	}	1081	}
913		1082
914	wantarray ? @res : $res[0]	1083	wantarray ? @res : $res[0]
915	}	1084	}
916		1085
		1086	=item cf::register_script_function $function => $cb
		1087
		1088	Register a function that can be called from within map/npc scripts. The
		1089	function should be reasonably secure and should be put into a package name
		1090	like the extension.
		1091
		1092	Example: register a function that gets called whenever a map script calls
		1093	C<rent::overview>, as used by the C<rent> extension.
		1094
		1095	cf::register_script_function "rent::overview" => sub {
		1096	...
		1097	};
		1098
		1099	=cut
		1100
917	sub register_script_function {	1101	sub register_script_function {
918	my ($fun, $cb) = @_;	1102	my ($fun, $cb) = @_;
919		1103
920	no strict 'refs';	1104	no strict 'refs';
921	*{"safe::$fun"} = $safe_hole->wrap ($cb);	1105	*{"safe::$fun"} = $safe_hole->wrap ($cb);
922	}	1106	}
923		1107
		1108	=back
		1109
		1110	=cut
		1111
		1112	#############################################################################
		1113
		1114	=head2 EXTENSION DATABASE SUPPORT
		1115
		1116	Crossfire maintains a very simple database for extension use. It can
		1117	currently store anything that can be serialised using Storable, which
		1118	excludes objects.
		1119
		1120	The parameter C<$family> should best start with the name of the extension
		1121	using it, it should be unique.
		1122
		1123	=over 4
		1124
		1125	=item $hashref = cf::db_get $family
		1126
		1127	Return a hashref for use by the extension C<$family>, which can be
		1128	modified. After modifications, you have to call C<cf::db_dirty> or
		1129	C<cf::db_sync>.
		1130
		1131	=item $value = cf::db_get $family => $key
		1132
		1133	Returns a single value from the database
		1134
		1135	=item cf::db_put $family => $hashref
		1136
		1137	Stores the given family hashref into the database. Updates are delayed, if
		1138	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		1139
		1140	=item cf::db_put $family => $key => $value
		1141
		1142	Stores the given C<$value> in the family hash. Updates are delayed, if you
		1143	want the data to be synced to disk immediately, use C<cf::db_sync>.
		1144
		1145	=item cf::db_dirty
		1146
		1147	Marks the database as dirty, to be updated at a later time.
		1148
		1149	=item cf::db_sync
		1150
		1151	Immediately write the database to disk I<if it is dirty>.
		1152
		1153	=cut
		1154
		1155	our $DB;
		1156
		1157	{
		1158	my $path = cf::localdir . "/database.pst";
		1159
		1160	sub db_load() {
		1161	warn "loading database $path\n";#d# remove later
		1162	$DB = stat $path ? Storable::retrieve $path : { };
		1163	}
		1164
		1165	my $pid;
		1166
		1167	sub db_save() {
		1168	warn "saving database $path\n";#d# remove later
		1169	waitpid $pid, 0 if $pid;
		1170	if (0 == ($pid = fork)) {
		1171	$DB->{_meta}{version} = 1;
		1172	Storable::nstore $DB, "$path~";
		1173	rename "$path~", $path;
		1174	cf::_exit 0 if defined $pid;
		1175	}
		1176	}
		1177
		1178	my $dirty;
		1179
		1180	sub db_sync() {
		1181	db_save if $dirty;
		1182	undef $dirty;
		1183	}
		1184
		1185	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		1186	db_sync;
		1187	});
		1188
		1189	sub db_dirty() {
		1190	$dirty = 1;
		1191	$idle->start;
		1192	}
		1193
		1194	sub db_get($;$) {
		1195	@_ >= 2
		1196	? $DB->{$_[0]}{$_[1]}
		1197	: ($DB->{$_[0]} ||= { })
		1198	}
		1199
		1200	sub db_put($$;$) {
		1201	if (@_ >= 3) {
		1202	$DB->{$_[0]}{$_[1]} = $_[2];
		1203	} else {
		1204	$DB->{$_[0]} = $_[1];
		1205	}
		1206	db_dirty;
		1207	}
		1208
		1209	cf::global->attach (
		1210	prio => 10000,
		1211	on_cleanup => sub {
		1212	db_sync;
		1213	},
		1214	);
		1215	}
		1216
924	#############################################################################	1217	#############################################################################
925	# the server's main()	1218	# the server's main()
926		1219
		1220	sub cfg_load {
		1221	open my $fh, "<:utf8", cf::confdir . "/config"
		1222	or return;
		1223
		1224	local $/;
		1225	*CFG = YAML::Syck::Load <$fh>;
		1226	}
		1227
927	sub main {	1228	sub main {
		1229	cfg_load;
		1230	db_load;
		1231	load_extensions;
928	Event::loop;	1232	Event::loop;
929	}	1233	}
930		1234
931	#############################################################################	1235	#############################################################################
932	# initialisation	1236	# initialisation
933		1237
		1238	sub _perl_reload() {
		1239	warn "reloading...";
		1240
		1241	eval {
		1242	local $FREEZE = 1;
		1243
		1244	cf::emergency_save;
		1245
		1246	# cancel all watchers
		1247	for (Event::all_watchers) {
		1248	$_->cancel if $_->data & WF_AUTOCANCEL;
		1249	}
		1250
		1251	# cancel all extension coros
		1252	$_->cancel for values %EXT_CORO;
		1253	%EXT_CORO = ();
		1254
		1255	# unload all extensions
		1256	for (@exts) {
		1257	warn "unloading <$_>";
		1258	unload_extension $_;
		1259	}
		1260
		1261	# unload all modules loaded from $LIBDIR
		1262	while (my ($k, $v) = each %INC) {
		1263	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		1264
		1265	warn "removing <$k>";
		1266	delete $INC{$k};
		1267
		1268	$k =~ s/\.pm$//;
		1269	$k =~ s/\//::/g;
		1270
		1271	if (my $cb = $k->can ("unload_module")) {
		1272	$cb->();
		1273	}
		1274
		1275	Symbol::delete_package $k;
		1276	}
		1277
		1278	# sync database to disk
		1279	cf::db_sync;
		1280	IO::AIO::flush;
		1281
		1282	# get rid of safe::, as good as possible
		1283	Symbol::delete_package "safe::$_"
		1284	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		1285
		1286	# remove register_script_function callbacks
		1287	# TODO
		1288
		1289	# unload cf.pm "a bit"
		1290	delete $INC{"cf.pm"};
		1291
		1292	# don't, removes xs symbols, too,
		1293	# and global variables created in xs
		1294	#Symbol::delete_package __PACKAGE__;
		1295
		1296	# reload cf.pm
		1297	warn "reloading cf.pm";
		1298	require cf;
		1299	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		1300
		1301	# load config and database again
		1302	cf::cfg_load;
		1303	cf::db_load;
		1304
		1305	# load extensions
		1306	warn "load extensions";
		1307	cf::load_extensions;
		1308
		1309	# reattach attachments to objects
		1310	warn "reattach";
		1311	_global_reattach;
		1312	};
		1313	warn $@ if $@;
		1314
		1315	warn "reloaded";
		1316	};
		1317
		1318	sub perl_reload() {
		1319	_perl_reload;
		1320	}
		1321
934	register "<global>", __PACKAGE__;	1322	register "<global>", __PACKAGE__;
935		1323
		1324	register_command "perl-reload" => sub {
		1325	my ($who, $arg) = @_;
		1326
		1327	if ($who->flag (FLAG_WIZ)) {
		1328	$who->message ("reloading...");
		1329	_perl_reload;
		1330	}
		1331	};
		1332
936	unshift @INC, $LIBDIR;	1333	unshift @INC, $LIBDIR;
937		1334
938	load_extensions;
939
940	$TICK_WATCHER = Event->timer (	1335	$TICK_WATCHER = Event->timer (
		1336	reentrant => 0,
941	prio => 1,	1337	prio => 0,
942	at => $NEXT_TICK || 1,	1338	at => $NEXT_TICK || $TICK,
		1339	data => WF_AUTOCANCEL,
943	cb => sub {	1340	cb => sub {
		1341	unless ($FREEZE) {
944	cf::server_tick; # one server iteration	1342	cf::server_tick; # one server iteration
		1343	$RUNTIME += $TICK;
		1344	}
945		1345
946	my $NOW = Event::time;
947	$NEXT_TICK += $TICK;	1346	$NEXT_TICK += $TICK;
948		1347
949	# if we are delayed by four ticks, skip them all	1348	# if we are delayed by four ticks or more, skip them all
950	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	1349	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
951		1350
952	$TICK_WATCHER->at ($NEXT_TICK);	1351	$TICK_WATCHER->at ($NEXT_TICK);
953	$TICK_WATCHER->start;	1352	$TICK_WATCHER->start;
954	},	1353	},
955	);	1354	);
956		1355
957	_reload_2;	1356	IO::AIO::max_poll_time $TICK * 0.2;
		1357
		1358	Event->io (fd => IO::AIO::poll_fileno,
		1359	poll => 'r',
		1360	prio => 5,
		1361	data => WF_AUTOCANCEL,
		1362	cb => \&IO::AIO::poll_cb);
		1363
		1364	# we must not ever block the main coroutine
		1365	$Coro::idle = sub {
		1366	#Carp::cluck "FATAL: Coro::idle was called, major BUG\n";#d#
		1367	warn "FATAL: Coro::idle was called, major BUG\n";
		1368	(Coro::unblock_sub {
		1369	Event::one_event;
		1370	})->();
		1371	};
958		1372
959	1	1373	1
960		1374

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