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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.46 by root, Sun Aug 27 16:15:12 2006 UTC vs.
Revision 1.102 by root, Wed Dec 27 15:20:54 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;
		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
		28	$Coro::main->prio (Coro::PRIO_MIN);
		29
		30	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		31
16	our %COMMAND = ();	32	our %COMMAND = ();
		33	our %COMMAND_TIME = ();
		34	our %EXTCMD = ();
		35
17	our @EVENT;	36	our @EVENT;
18	our %PROP_TYPE;	37	our $LIBDIR = datadir . "/ext";
19	our %PROP_IDX;
20	our $LIBDIR = maps_directory "perl";
21		38
22	our $TICK = MAX_TIME * 1e-6;	39	our $TICK = MAX_TIME * 1e-6;
23	our $TICK_WATCHER;	40	our $TICK_WATCHER;
24	our $NEXT_TICK;	41	our $NEXT_TICK;
		42
		43	our %CFG;
		44
		45	our $UPTIME; $UPTIME ||= time;
		46
		47	#############################################################################
		48
		49	=head2 GLOBAL VARIABLES
		50
		51	=over 4
		52
		53	=item $cf::UPTIME
		54
		55	The timestamp of the server start (so not actually an uptime).
		56
		57	=item $cf::LIBDIR
		58
		59	The perl library directory, where extensions and cf-specific modules can
		60	be found. It will be added to C<@INC> automatically.
		61
		62	=item $cf::TICK
		63
		64	The interval between server ticks, in seconds.
		65
		66	=item %cf::CFG
		67
		68	Configuration for the server, loaded from C</etc/crossfire/config>, or
		69	from wherever your confdir points to.
		70
		71	=back
		72
		73	=cut
25		74
26	BEGIN {	75	BEGIN {
27	*CORE::GLOBAL::warn = sub {	76	*CORE::GLOBAL::warn = sub {
28	my $msg = join "", @_;	77	my $msg = join "", @_;
29	$msg .= "\n"	78	$msg .= "\n"
…		…
32	print STDERR "cfperl: $msg";	81	print STDERR "cfperl: $msg";
33	LOG llevError, "cfperl: $msg";	82	LOG llevError, "cfperl: $msg";
34	};	83	};
35	}	84	}
36		85
37	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	86	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
38		87	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
39	# generate property mutators	88	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
40	sub prop_gen {	89	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
41	my ($prefix, $class) = @_;	90	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
42
43	no strict 'refs';
44
45	for my $prop (keys %PROP_TYPE) {
46	$prop =~ /^\Q$prefix\E_(.*$)/ or next;
47	my $sub = lc $1;
48
49	my $type = $PROP_TYPE{$prop};
50	my $idx = $PROP_IDX {$prop};
51
52	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
53	$_[0]->get_property ($type, $idx)
54	};
55
56	*{"$class\::set_$sub"} = sub {
57	$_[0]->set_property ($type, $idx, $_[1]);
58	} unless $ignore_set{$prop};
59	}
60	}
61
62	# auto-generate most of the API
63
64	prop_gen OBJECT_PROP => "cf::object";
65	# CFAPI_OBJECT_ANIMATION?
66	prop_gen PLAYER_PROP => "cf::object::player";
67
68	prop_gen MAP_PROP => "cf::map";
69	prop_gen ARCH_PROP => "cf::arch";
70
71	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';	91	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
72		92
73	# we bless all objects into (empty) derived classes to force a method lookup	93	# we bless all objects into (empty) derived classes to force a method lookup
74	# within the Safe compartment.	94	# within the Safe compartment.
75	for my $pkg (qw(cf::object cf::object::player cf::player cf::map cf::party cf::region cf::arch)) {	95	for my $pkg (qw(
		96	cf::global cf::attachable
		97	cf::object cf::object::player
		98	cf::client cf::player
		99	cf::arch cf::living
		100	cf::map cf::party cf::region
		101	)) {
76	no strict 'refs';	102	no strict 'refs';
77	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	103	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
78	}	104	}
79		105
80	$Event::DIED = sub {	106	$Event::DIED = sub {
…		…
82	};	108	};
83		109
84	my %ext_pkg;	110	my %ext_pkg;
85	my @exts;	111	my @exts;
86	my @hook;	112	my @hook;
87	my %command;
88	my %extcmd;
89		113
90	#############################################################################	114	=head2 UTILITY FUNCTIONS
91	# utility functions	115
		116	=over 4
		117
		118	=cut
92		119
93	use JSON::Syck (); # TODO# replace by JSON::PC once working	120	use JSON::Syck (); # TODO# replace by JSON::PC once working
		121
		122	=item $ref = cf::from_json $json
		123
		124	Converts a JSON string into the corresponding perl data structure.
		125
		126	=cut
94		127
95	sub from_json($) {	128	sub from_json($) {
96	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs	129	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
97	JSON::Syck::Load $_[0]	130	JSON::Syck::Load $_[0]
98	}	131	}
99		132
		133	=item $json = cf::to_json $ref
		134
		135	Converts a perl data structure into its JSON representation.
		136
		137	=cut
		138
100	sub to_json($) {	139	sub to_json($) {
101	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs	140	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
102	JSON::Syck::Dump $_[0]	141	JSON::Syck::Dump $_[0]
103	}	142	}
104		143
		144	=back
		145
		146	=cut
		147
105	#############################################################################	148	#############################################################################
106	# "new" plug-in system
107		149
108	=item $object->attach ($attachment, ...)	150	=head2 ATTACHABLE OBJECTS
109		151
110	Attach a pre-registered attachment to an object.	152	Many objects in crossfire are so-called attachable objects. That means you can
		153	attach callbacks/event handlers (a collection of which is called an "attachment")
		154	to it. All such attachable objects support the following methods.
111		155
112	=item $player->attach ($attachment, ...)	156	In the following description, CLASS can be any of C<global>, C<object>
		157	C<player>, C<client> or C<map> (i.e. the attachable objects in
		158	crossfire+).
113		159
114	Attach a pre-registered attachment to a player.	160	=over 4
115		161
116	=item $map->attach ($attachment, ...) # not yet persistent	162	=item $attachable->attach ($attachment, key => $value...)
117		163
118	Attach a pre-registered attachment to a map.	164	=item $attachable->detach ($attachment)
119		165
120	=item cf::attach_global ...	166	Attach/detach a pre-registered attachment to a specific object and give it
		167	the specified key/value pairs as arguments.
121		168
122	Attach handlers for global events.	169	Example, attach a minesweeper attachment to the given object, making it a
		170	10x10 minesweeper game:
123		171
124	This and all following C<attach_*>-functions expect any number of the	172	$obj->attach (minesweeper => width => 10, height => 10);
125	following handler/hook descriptions:	173
		174	=item $bool = $attachable->attached ($name)
		175
		176	Checks wether the named attachment is currently attached to the object.
		177
		178	=item cf::CLASS->attach ...
		179
		180	=item cf::CLASS->detach ...
		181
		182	Define an anonymous attachment and attach it to all objects of the given
		183	CLASS. See the next function for an explanation of its arguments.
		184
		185	You can attach to global events by using the C<cf::global> class.
		186
		187	Example, log all player logins:
		188
		189	cf::player->attach (
		190	on_login => sub {
		191	my ($pl) = @_;
		192	...
		193	},
		194	);
		195
		196	Example, attach to the jeweler skill:
		197
		198	cf::object->attach (
		199	type => cf::SKILL,
		200	subtype => cf::SK_JEWELER,
		201	on_use_skill => sub {
		202	my ($sk, $ob, $part, $dir, $msg) = @_;
		203	...
		204	},
		205	);
		206
		207	=item cf::CLASS::attachment $name, ...
		208
		209	Register an attachment by C<$name> through which attachable objects of the
		210	given CLASS can refer to this attachment.
		211
		212	Some classes such as crossfire maps and objects can specify attachments
		213	that are attached at load/instantiate time, thus the need for a name.
		214
		215	These calls expect any number of the following handler/hook descriptions:
126		216
127	=over 4	217	=over 4
128		218
129	=item prio => $number	219	=item prio => $number
130		220
…		…
132	by another C<prio> setting). Lower priority handlers get executed	222	by another C<prio> setting). Lower priority handlers get executed
133	earlier. The default priority is C<0>, and many built-in handlers are	223	earlier. The default priority is C<0>, and many built-in handlers are
134	registered at priority C<-1000>, so lower priorities should not be used	224	registered at priority C<-1000>, so lower priorities should not be used
135	unless you know what you are doing.	225	unless you know what you are doing.
136		226
		227	=item type => $type
		228
		229	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		230	given type of objects only (the additional parameter C<subtype> can be
		231	used to further limit to the given subtype).
		232
137	=item on_I<event> => \&cb	233	=item on_I<event> => \&cb
138		234
139	Call the given code reference whenever the named event happens (event is	235	Call the given code reference whenever the named event happens (event is
140	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which	236	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
141	handlers are recognised generally depends on the type of object these	237	handlers are recognised generally depends on the type of object these
…		…
150	package and register them. Only handlers for eevents supported by the	246	package and register them. Only handlers for eevents supported by the
151	object/class are recognised.	247	object/class are recognised.
152		248
153	=back	249	=back
154		250
155	=item cf::attach_to_type $object_type, ...	251	Example, define an attachment called "sockpuppet" that calls the given
		252	event handler when a monster attacks:
156		253
157	Attach handlers for a specific object type (e.g. TRANSPORT).	254	cf::object::attachment sockpuppet =>
		255	on_skill_attack => sub {
		256	my ($self, $victim) = @_;
		257	...
		258	}
		259	}
158		260
159	=item cf::attach_to_objects ...	261	=item $attachable->valid
160		262
161	Attach handlers to all objects. Do not use this except for debugging or	263	Just because you have a perl object does not mean that the corresponding
162	very rare events, as handlers are (obviously) called for I<all> objects in	264	C-level object still exists. If you try to access an object that has no
163	the game.	265	valid C counterpart anymore you get an exception at runtime. This method
164		266	can be used to test for existence of the C object part without causing an
165	=item cf::attach_to_players ...	267	exception.
166
167	Attach handlers to all players.
168
169	=item cf::attach_to_maps ...
170
171	Attach handlers to all maps.
172
173	=item cf:register_attachment $name, ...
174		268
175	=cut	269	=cut
176		270
177	# the following variables are defined in .xs and must not be re-created	271	# the following variables are defined in .xs and must not be re-created
178	our @CB_GLOBAL = (); # registry for all global events	272	our @CB_GLOBAL = (); # registry for all global events
		273	our @CB_ATTACHABLE = (); # registry for all attachables
179	our @CB_OBJECT = (); # all objects (should not be used except in emergency)	274	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
180	our @CB_PLAYER = ();	275	our @CB_PLAYER = ();
		276	our @CB_CLIENT = ();
181	our @CB_TYPE = (); # registry for type (cf-object class) based events	277	our @CB_TYPE = (); # registry for type (cf-object class) based events
182	our @CB_MAP = ();	278	our @CB_MAP = ();
183		279
184	my %attachment;	280	my %attachment;
185		281
186	sub _attach_cb($\%$$$) {	282	sub _attach_cb($$$$) {
187	my ($registry, $undo, $event, $prio, $cb) = @_;	283	my ($registry, $event, $prio, $cb) = @_;
188		284
189	use sort 'stable';	285	use sort 'stable';
190		286
191	$cb = [$prio, $cb];	287	$cb = [$prio, $cb];
192		288
193	@{$registry->[$event]} = sort	289	@{$registry->[$event]} = sort
194	{ $a->[0] cmp $b->[0] }	290	{ $a->[0] cmp $b->[0] }
195	@{$registry->[$event] || []}, $cb;	291	@{$registry->[$event] || []}, $cb;
196
197	push @{$undo->{cb}}, [$event, $cb];
198	}	292	}
		293
		294	# hack
		295	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
199		296
200	# attach handles attaching event callbacks	297	# attach handles attaching event callbacks
201	# the only thing the caller has to do is pass the correct	298	# the only thing the caller has to do is pass the correct
202	# registry (== where the callback attaches to).	299	# registry (== where the callback attaches to).
203	sub _attach(\@$@) {	300	sub _attach {
204	my ($registry, $klass, @arg) = @_;	301	my ($registry, $klass, @arg) = @_;
205		302
		303	my $object_type;
206	my $prio = 0;	304	my $prio = 0;
207
208	my %undo = (
209	registry => $registry,
210	cb => [],
211	);
212
213	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;	305	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		306
		307	#TODO: get rid of this hack
		308	if ($attachable_klass{$klass}) {
		309	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		310	}
214		311
215	while (@arg) {	312	while (@arg) {
216	my $type = shift @arg;	313	my $type = shift @arg;
217		314
218	if ($type eq "prio") {	315	if ($type eq "prio") {
219	$prio = shift @arg;	316	$prio = shift @arg;
220		317
		318	} elsif ($type eq "type") {
		319	$object_type = shift @arg;
		320	$registry = $CB_TYPE[$object_type] ||= [];
		321
		322	} elsif ($type eq "subtype") {
		323	defined $object_type or Carp::croak "subtype specified without type";
		324	my $object_subtype = shift @arg;
		325	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		326
221	} elsif ($type eq "package") {	327	} elsif ($type eq "package") {
222	my $pkg = shift @arg;	328	my $pkg = shift @arg;
223		329
224	while (my ($name, $id) = each %cb_id) {	330	while (my ($name, $id) = each %cb_id) {
225	if (my $cb = $pkg->can ($name)) {	331	if (my $cb = $pkg->can ($name)) {
226	_attach_cb $registry, %undo, $id, $prio, $cb;	332	_attach_cb $registry, $id, $prio, $cb;
227	}	333	}
228	}	334	}
229		335
230	} elsif (exists $cb_id{$type}) {	336	} elsif (exists $cb_id{$type}) {
231	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;	337	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
232		338
233	} elsif (ref $type) {	339	} elsif (ref $type) {
234	warn "attaching objects not supported, ignoring.\n";	340	warn "attaching objects not supported, ignoring.\n";
235		341
236	} else {	342	} else {
237	shift @arg;	343	shift @arg;
238	warn "attach argument '$type' not supported, ignoring.\n";	344	warn "attach argument '$type' not supported, ignoring.\n";
239	}	345	}
240	}	346	}
241
242	\%undo
243	}	347	}
244		348
245	sub _attach_attachment {	349	sub _object_attach {
246	my ($klass, $obj, $name, @args) = q_;	350	my ($obj, $name, %arg) = @_;
247		351
248	my $res;	352	return if exists $obj->{_attachment}{$name};
249		353
250	if (my $attach = $attachment{$name}) {	354	if (my $attach = $attachment{$name}) {
251	my $registry = $obj->registry;	355	my $registry = $obj->registry;
252		356
		357	for (@$attach) {
		358	my ($klass, @attach) = @$_;
253	$res = _attach @$registry, $klass, @$attach;	359	_attach $registry, $klass, @attach;
254
255	if (my $cb = delete $registry->[EVENT_OBJECT_INSTANTIATE]) {
256	for (@$cb) {
257	eval { $_->[1]->($obj, @args); };
258	if ($@) {
259	warn "$@";
260	warn "... while processing '$name' instantiate with args <@args>.\n";
261	}
262	}	360	}
263	}	361
		362	$obj->{$name} = \%arg;
264	} else {	363	} else {
265	warn "object uses attachment '$name' that is not available, postponing.\n";	364	warn "object uses attachment '$name' that is not available, postponing.\n";
266	}	365	}
267		366
268	push @{$obj->{_attachment}}, $name;	367	$obj->{_attachment}{$name} = undef;
269
270	$res->{attachment} = $name;
271	$res
272	}	368	}
273		369
274	sub cf::object::attach {	370	sub cf::attachable::attach {
		371	if (ref $_[0]) {
		372	_object_attach @_;
		373	} else {
		374	_attach shift->_attach_registry, @_;
		375	}
		376	};
		377
		378	# all those should be optimised
		379	sub cf::attachable::detach {
275	my ($obj, $name, @args) = @_;	380	my ($obj, $name) = @_;
276		381
277	_attach_attachment KLASS_OBJECT, $obj, $name, @args;	382	if (ref $obj) {
278	}	383	delete $obj->{_attachment}{$name};
		384	reattach ($obj);
		385	} else {
		386	Carp::croak "cannot, currently, detach class attachments";
		387	}
		388	};
279		389
280	sub cf::player::attach {	390	sub cf::attachable::attached {
281	my ($obj, $name, @args) = @_;	391	my ($obj, $name) = @_;
282		392
283	_attach_attachment KLASS_PLAYER, $obj, $name, @args;	393	exists $obj->{_attachment}{$name}
284	}	394	}
285		395
286	sub cf::map::attach {	396	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
287	my ($obj, $name, @args) = @_;	397	eval "#line " . __LINE__ . " 'cf.pm'
		398	sub cf::\L$klass\E::_attach_registry {
		399	(\\\@CB_$klass, KLASS_$klass)
		400	}
288		401
289	_attach_attachment KLASS_MAP, $obj, $name, @args;	402	sub cf::\L$klass\E::attachment {
290	}
291
292	sub attach_global {
293	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
294	}
295
296	sub attach_to_type {
297	my $type = shift;
298
299	_attach @{$CB_TYPE[$type]}, KLASS_OBJECT, @_
300	}
301
302	sub attach_to_objects {
303	_attach @CB_OBJECT, KLASS_OBJECT, @_
304	}
305
306	sub attach_to_players {
307	_attach @CB_PLAYER, KLASS_PLAYER, @_
308	}
309
310	sub attach_to_maps {
311	_attach @CB_MAP, KLASS_MAP, @_
312	}
313
314	sub register_attachment {
315	my $name = shift;	403	my \$name = shift;
316		404
317	$attachment{$name} = [@_];	405	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		406	}
		407	";
		408	die if $@;
318	}	409	}
319		410
320	our $override;	411	our $override;
321	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?	412	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
322		413
…		…
336	for (@$callbacks) {	427	for (@$callbacks) {
337	eval { &{$_->[1]} };	428	eval { &{$_->[1]} };
338		429
339	if ($@) {	430	if ($@) {
340	warn "$@";	431	warn "$@";
341	warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";	432	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
342	override;	433	override;
343	}	434	}
344		435
345	return 1 if $override;	436	return 1 if $override;
346	}	437	}
347		438
348	0	439	0
349	}	440	}
		441
		442	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		443
		444	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		445
		446	Generate an object-specific event with the given arguments.
		447
		448	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		449	removed in future versions), and there is no public API to access override
		450	results (if you must, access C<@cf::invoke_results> directly).
		451
		452	=back
		453
		454	=cut
350		455
351	#############################################################################	456	#############################################################################
352	# object support	457	# object support
353		458
354	sub instantiate {
355	my ($obj, $data) = @_;
356
357	$data = from_json $data;
358
359	for (@$data) {
360	my ($name, $args) = @$_;
361	attach $obj, $name, @{$args || [] };
362	}
363	}
364
365	# basically do the same as instantiate, without calling instantiate
366	sub reattach {	459	sub reattach {
367	warn "reattach<@_>\n";#d#	460	# basically do the same as instantiate, without calling instantiate
368	my ($obj) = @_;	461	my ($obj) = @_;
		462
369	my $registry = $obj->registry;	463	my $registry = $obj->registry;
370		464
		465	@$registry = ();
		466
		467	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		468
371	for my $name (@{ $obj->{_attachment} }) {	469	for my $name (keys %{ $obj->{_attachment} || {} }) {
372	if (my $attach = $attachment{$name}) {	470	if (my $attach = $attachment{$name}) {
		471	for (@$attach) {
		472	my ($klass, @attach) = @$_;
373	_attach @$registry, KLASS_OBJECT, @$attach;	473	_attach $registry, $klass, @attach;
		474	}
374	} else {	475	} else {
375	warn "object uses attachment '$name' that is not available, postponing.\n";	476	warn "object uses attachment '$name' that is not available, postponing.\n";
376	}	477	}
377	}	478	}
378
379	warn "reattach<@_, $_>\n";
380	}	479	}
		480
		481	cf::attachable->attach (
		482	prio => -1000000,
		483	on_instantiate => sub {
		484	my ($obj, $data) = @_;
		485
		486	$data = from_json $data;
		487
		488	for (@$data) {
		489	my ($name, $args) = @$_;
		490
		491	$obj->attach ($name, %{$args || {} });
		492	}
		493	},
		494	on_reattach => \&reattach,
		495	on_clone => sub {
		496	my ($src, $dst) = @_;
		497
		498	@{$dst->registry} = @{$src->registry};
		499
		500	%$dst = %$src;
		501
		502	%{$dst->{_attachment}} = %{$src->{_attachment}}
		503	if exists $src->{_attachment};
		504	},
		505	);
381		506
382	sub object_freezer_save {	507	sub object_freezer_save {
383	my ($filename, $objs) = @_;	508	my ($filename, $rdata, $objs) = @_;
384	warn "freeze $filename\n";#d#
385	use Data::Dumper; print Dumper $objs;
386		509
387	$filename .= ".pst";	510	if (length $$rdata) {
		511	warn sprintf "saving %s (%d,%d)\n",
		512	$filename, length $$rdata, scalar @$objs;
388		513
389	if (@$objs) {
390	open my $fh, ">:raw", "$filename~";	514	if (open my $fh, ">:raw", "$filename~") {
391	chmod $fh, SAVE_MODE;	515	chmod SAVE_MODE, $fh;
		516	syswrite $fh, $$rdata;
		517	close $fh;
		518
		519	if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
		520	chmod SAVE_MODE, $fh;
392	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };	521	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
393	close $fh;	522	close $fh;
		523	rename "$filename.pst~", "$filename.pst";
		524	} else {
		525	unlink "$filename.pst";
		526	}
		527
394	rename "$filename~", $filename;	528	rename "$filename~", $filename;
		529	} else {
		530	warn "FATAL: $filename~: $!\n";
		531	}
395	} else {	532	} else {
396	unlink $filename;	533	unlink $filename;
		534	unlink "$filename.pst";
397	}	535	}
		536	}
		537
		538	sub object_freezer_as_string {
		539	my ($rdata, $objs) = @_;
		540
		541	use Data::Dumper;
		542
		543	$$rdata . Dumper $objs
398	}	544	}
399		545
400	sub object_thawer_load {	546	sub object_thawer_load {
401	my ($filename) = @_;	547	my ($filename) = @_;
402		548
403	warn "thaw $filename\n";#d#	549	local $/;
404		550
		551	my $av;
		552
		553	#TODO: use sysread etc.
		554	if (open my $data, "<:raw:perlio", $filename) {
		555	$data = <$data>;
405	open my $fh, "<:raw:perlio", "$filename.pst"	556	if (open my $pst, "<:raw:perlio", "$filename.pst") {
406	or return;	557	$av = eval { (Storable::thaw <$pst>)->{objs} };
407		558	}
408	eval { local $/; (Storable::thaw <$fh>)->{objs} }	559	return ($data, $av);
409	}
410
411	attach_to_objects
412	prio => -1000000,
413	on_clone => sub {
414	my ($src, $dst) = @_;
415
416	@{$dst->registry} = @{$src->registry};
417	warn "registry clone ", join ":", @{$src->registry};#d#
418
419	%$dst = %$src;
420
421	$dst->{_attachment} = [@{ $src->{_attachment} }]
422	if exists $src->{_attachment};
423
424	warn "clone<@_>\n";#d#
425	},	560	}
426	;	561
		562	()
		563	}
427		564
428	#############################################################################	565	#############################################################################
429	# old plug-in events	566	# command handling &c
430		567
431	sub inject_event {	568	=item cf::register_command $name => \&callback($ob,$args);
432	my $extension = shift;
433	my $event_code = shift;
434		569
435	my $cb = $hook[$event_code]{$extension}	570	Register a callback for execution when the client sends the user command
436	or return;	571	$name.
437		572
438	&$cb	573	=cut
439	}
440
441	sub inject_global_event {
442	my $event = shift;
443
444	my $cb = $hook[$event]
445	or return;
446
447	List::Util::max map &$_, values %$cb
448	}
449
450	sub inject_command {
451	my ($name, $obj, $params) = @_;
452
453	for my $cmd (@{ $command{$name} }) {
454	$cmd->[1]->($obj, $params);
455	}
456
457	-1
458	}
459		574
460	sub register_command {	575	sub register_command {
461	my ($name, $time, $cb) = @_;	576	my ($name, $cb) = @_;
462		577
463	my $caller = caller;	578	my $caller = caller;
464	#warn "registering command '$name/$time' to '$caller'";	579	#warn "registering command '$name/$time' to '$caller'";
465		580
466	push @{ $command{$name} }, [$time, $cb, $caller];	581	push @{ $COMMAND{$name} }, [$caller, $cb];
467	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
468	}	582	}
		583
		584	=item cf::register_extcmd $name => \&callback($pl,$packet);
		585
		586	Register a callbackf ro execution when the client sends an extcmd packet.
		587
		588	If the callback returns something, it is sent back as if reply was being
		589	called.
		590
		591	=cut
469		592
470	sub register_extcmd {	593	sub register_extcmd {
471	my ($name, $cb) = @_;	594	my ($name, $cb) = @_;
472		595
473	my $caller = caller;	596	my $caller = caller;
474	#warn "registering extcmd '$name' to '$caller'";	597	#warn "registering extcmd '$name' to '$caller'";
475		598
476	$extcmd{$name} = [$cb, $caller];	599	$EXTCMD{$name} = [$cb, $caller];
477	}	600	}
		601
		602	cf::player->attach (
		603	on_command => sub {
		604	my ($pl, $name, $params) = @_;
		605
		606	my $cb = $COMMAND{$name}
		607	or return;
		608
		609	for my $cmd (@$cb) {
		610	$cmd->[1]->($pl->ob, $params);
		611	}
		612
		613	cf::override;
		614	},
		615	on_extcmd => sub {
		616	my ($pl, $buf) = @_;
		617
		618	my $msg = eval { from_json $buf };
		619
		620	if (ref $msg) {
		621	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		622	if (my %reply = $cb->[0]->($pl, $msg)) {
		623	$pl->ext_reply ($msg->{msgid}, %reply);
		624	}
		625	}
		626	} else {
		627	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		628	}
		629
		630	cf::override;
		631	},
		632	);
478		633
479	sub register {	634	sub register {
480	my ($base, $pkg) = @_;	635	my ($base, $pkg) = @_;
481		636
482	#TODO	637	#TODO
…		…
501	. "#line 1 \"$path\"\n{\n"	656	. "#line 1 \"$path\"\n{\n"
502	. (do { local $/; <$fh> })	657	. (do { local $/; <$fh> })
503	. "\n};\n1";	658	. "\n};\n1";
504		659
505	eval $source	660	eval $source
506	or die "$path: $@";	661	or die $@ ? "$path: $@\n"
		662	: "extension disabled.\n";
507		663
508	push @exts, $pkg;	664	push @exts, $pkg;
509	$ext_pkg{$base} = $pkg;	665	$ext_pkg{$base} = $pkg;
510		666
511	# no strict 'refs';	667	# no strict 'refs';
…		…
524	# for my $idx (0 .. $#PLUGIN_EVENT) {	680	# for my $idx (0 .. $#PLUGIN_EVENT) {
525	# delete $hook[$idx]{$pkg};	681	# delete $hook[$idx]{$pkg};
526	# }	682	# }
527		683
528	# remove commands	684	# remove commands
529	for my $name (keys %command) {	685	for my $name (keys %COMMAND) {
530	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	686	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
531		687
532	if (@cb) {	688	if (@cb) {
533	$command{$name} = \@cb;	689	$COMMAND{$name} = \@cb;
534	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
535	} else {	690	} else {
536	delete $command{$name};
537	delete $COMMAND{"$name\000"};	691	delete $COMMAND{$name};
538	}	692	}
539	}	693	}
540		694
541	# remove extcmds	695	# remove extcmds
542	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	696	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
543	delete $extcmd{$name};	697	delete $EXTCMD{$name};
544	}	698	}
545		699
546	if (my $cb = $pkg->can ("unload")) {	700	if (my $cb = $pkg->can ("unload")) {
547	eval {	701	eval {
548	$cb->($pkg);	702	$cb->($pkg);
…		…
552		706
553	Symbol::delete_package $pkg;	707	Symbol::delete_package $pkg;
554	}	708	}
555		709
556	sub load_extensions {	710	sub load_extensions {
557	my $LIBDIR = maps_directory "perl";
558
559	for my $ext (<$LIBDIR/*.ext>) {	711	for my $ext (<$LIBDIR/*.ext>) {
560	next unless -r $ext;	712	next unless -r $ext;
561	eval {	713	eval {
562	load_extension $ext;	714	load_extension $ext;
563	1	715	1
564	} or warn "$ext not loaded: $@";	716	} or warn "$ext not loaded: $@";
565	}	717	}
566	}	718	}
567		719
568	sub _perl_reload(&) {
569	my ($msg) = @_;
570
571	$msg->("reloading...");
572
573	eval {
574	# 1. cancel all watchers
575	$_->cancel for Event::all_watchers;
576
577	# 2. unload all extensions
578	for (@exts) {
579	$msg->("unloading <$_>");
580	unload_extension $_;
581	}
582
583	# 3. unload all modules loaded from $LIBDIR
584	while (my ($k, $v) = each %INC) {
585	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
586
587	$msg->("removing <$k>");
588	delete $INC{$k};
589
590	$k =~ s/\.pm$//;
591	$k =~ s/\//::/g;
592
593	if (my $cb = $k->can ("unload_module")) {
594	$cb->();
595	}
596
597	Symbol::delete_package $k;
598	}
599
600	# 4. get rid of safe::, as good as possible
601	Symbol::delete_package "safe::$_"
602	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
603
604	# 5. remove register_script_function callbacks
605	# TODO
606
607	# 6. unload cf.pm "a bit"
608	delete $INC{"cf.pm"};
609
610	# don't, removes xs symbols, too,
611	# and global variables created in xs
612	#Symbol::delete_package __PACKAGE__;
613
614	# 7. reload cf.pm
615	$msg->("reloading cf.pm");
616	require cf;
617	};
618	$msg->($@) if $@;
619
620	$msg->("reloaded");
621	};
622
623	sub perl_reload() {
624	_perl_reload {
625	warn $_[0];
626	print "$_[0]\n";
627	};
628	}
629
630	register_command "perl-reload", 0, sub {
631	my ($who, $arg) = @_;
632
633	if ($who->flag (FLAG_WIZ)) {
634	_perl_reload {
635	warn $_[0];
636	$who->message ($_[0]);
637	};
638	}
639	};
640
641	#############################################################################
642	# extcmd framework, basically convert ext <msg>
643	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
644
645	attach_to_players
646	on_extcmd => sub {
647	my ($pl, $buf) = @_;
648
649	my $msg = eval { from_json $buf };
650
651	if (ref $msg) {
652	if (my $cb = $extcmd{$msg->{msgtype}}) {
653	if (my %reply = $cb->[0]->($pl, $msg)) {
654	$pl->ext_reply ($msg->{msgid}, %reply);
655	}
656	}
657	} else {
658	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
659	}
660
661	cf::override;
662	},
663	;
664
665	#############################################################################	720	#############################################################################
666	# load/save/clean perl data associated with a map	721	# load/save/clean perl data associated with a map
667		722
668	*cf::mapsupport::on_clean = sub {	723	*cf::mapsupport::on_clean = sub {
669	my ($map) = @_;	724	my ($map) = @_;
670		725
671	my $path = $map->tmpname;	726	my $path = $map->tmpname;
672	defined $path or return;	727	defined $path or return;
673		728
674	unlink "$path.cfperl";
675	unlink "$path.pst";	729	unlink "$path.pst";
676	};	730	};
677		731
678	*cf::mapsupport::on_swapin =
679	*cf::mapsupport::on_load = sub {
680	my ($map) = @_;
681
682	my $path = $map->tmpname;
683	$path = $map->path unless defined $path;
684
685	open my $fh, "<:raw", "$path.cfperl"
686	or return; # no perl data
687
688	my $data = Storable::thaw do { local $/; <$fh> };
689
690	$data->{version} <= 1
691	or return; # too new
692
693	$map->_set_obs ($data->{obs});
694	};
695
696	attach_to_maps prio => -10000, package => cf::mapsupport::;	732	cf::map->attach (prio => -10000, package => cf::mapsupport::);
697		733
698	#############################################################################	734	#############################################################################
699	# load/save perl data associated with player->ob objects	735	# load/save perl data associated with player->ob objects
700		736
701	sub all_objects(@) {	737	sub all_objects(@) {
702	@_, map all_objects ($_->inv), @_	738	@_, map all_objects ($_->inv), @_
703	}	739	}
704		740
705	attach_to_players	741	# TODO: compatibility cruft, remove when no longer needed
		742	cf::player->attach (
706	on_load => sub {	743	on_load => sub {
707	my ($pl, $path) = @_;	744	my ($pl, $path) = @_;
708		745
709	for my $o (all_objects $pl->ob) {	746	for my $o (all_objects $pl->ob) {
710	if (my $value = $o->get_ob_key_value ("_perl_data")) {	747	if (my $value = $o->get_ob_key_value ("_perl_data")) {
…		…
712		749
713	%$o = %{ Storable::thaw pack "H*", $value };	750	%$o = %{ Storable::thaw pack "H*", $value };
714	}	751	}
715	}	752	}
716	},	753	},
717	;	754	);
718		755
719	#############################################################################	756	#############################################################################
720	# core extensions - in perl	757
		758	=head2 CORE EXTENSIONS
		759
		760	Functions and methods that extend core crossfire objects.
		761
		762	=head3 cf::player
		763
		764	=over 4
721		765
722	=item cf::player::exists $login	766	=item cf::player::exists $login
723		767
724	Returns true when the given account exists.	768	Returns true when the given account exists.
725		769
…		…
728	sub cf::player::exists($) {	772	sub cf::player::exists($) {
729	cf::player::find $_[0]	773	cf::player::find $_[0]
730	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	774	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
731	}	775	}
732		776
		777	=item $player->ext_reply ($msgid, $msgtype, %msg)
		778
		779	Sends an ext reply to the player.
		780
		781	=cut
		782
		783	sub cf::player::ext_reply($$$%) {
		784	my ($self, $id, %msg) = @_;
		785
		786	$msg{msgid} = $id;
		787
		788	$self->send ("ext " . to_json \%msg);
		789	}
		790
		791	=back
		792
		793	=head3 cf::object::player
		794
		795	=over 4
		796
733	=item $player->reply ($npc, $msg[, $flags])	797	=item $player_object->reply ($npc, $msg[, $flags])
734		798
735	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	799	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
736	can be C<undef>. Does the right thing when the player is currently in a	800	can be C<undef>. Does the right thing when the player is currently in a
737	dialogue with the given NPC character.	801	dialogue with the given NPC character.
738		802
739	=cut	803	=cut
740		804
741	# rough implementation of a future "reply" method that works	805	# rough implementation of a future "reply" method that works
742	# with dialog boxes.	806	# with dialog boxes.
		807	#TODO: the first argument must go, split into a $npc->reply_to ( method
743	sub cf::object::player::reply($$$;$) {	808	sub cf::object::player::reply($$$;$) {
744	my ($self, $npc, $msg, $flags) = @_;	809	my ($self, $npc, $msg, $flags) = @_;
745		810
746	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	811	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
747		812
…		…
751	$msg = $npc->name . " says: $msg" if $npc;	816	$msg = $npc->name . " says: $msg" if $npc;
752	$self->message ($msg, $flags);	817	$self->message ($msg, $flags);
753	}	818	}
754	}	819	}
755		820
756	=item $player->ext_reply ($msgid, $msgtype, %msg)	821	=item $player_object->may ("access")
757		822
758	Sends an ext reply to the player.	823	Returns wether the given player is authorized to access resource "access"
		824	(e.g. "command_wizcast").
759		825
760	=cut	826	=cut
761		827
762	sub cf::player::ext_reply($$$%) {	828	sub cf::object::player::may {
		829	my ($self, $access) = @_;
		830
		831	$self->flag (cf::FLAG_WIZ) ||
		832	(ref $cf::CFG{"may_$access"}
		833	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		834	: $cf::CFG{"may_$access"})
		835	}
		836
		837	=head3 cf::client
		838
		839	=over 4
		840
		841	=item $client->send_drawinfo ($text, $flags)
		842
		843	Sends a drawinfo packet to the client. Circumvents output buffering so
		844	should not be used under normal circumstances.
		845
		846	=cut
		847
		848	sub cf::client::send_drawinfo {
		849	my ($self, $text, $flags) = @_;
		850
		851	utf8::encode $text;
		852	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		853	}
		854
		855
		856	=item $success = $client->query ($flags, "text", \&cb)
		857
		858	Queues a query to the client, calling the given callback with
		859	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		860	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		861
		862	Queries can fail, so check the return code. Or don't, as queries will become
		863	reliable at some point in the future.
		864
		865	=cut
		866
		867	sub cf::client::query {
		868	my ($self, $flags, $text, $cb) = @_;
		869
		870	return unless $self->state == ST_PLAYING
		871	|| $self->state == ST_SETUP
		872	|| $self->state == ST_CUSTOM;
		873
		874	$self->state (ST_CUSTOM);
		875
		876	utf8::encode $text;
		877	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		878
		879	$self->send_packet ($self->{query_queue}[0][0])
		880	if @{ $self->{query_queue} } == 1;
		881	}
		882
		883	cf::client->attach (
		884	on_reply => sub {
		885	my ($ns, $msg) = @_;
		886
		887	# this weird shuffling is so that direct followup queries
		888	# get handled first
		889	my $queue = delete $ns->{query_queue};
		890
		891	(shift @$queue)->[1]->($msg);
		892
		893	push @{ $ns->{query_queue} }, @$queue;
		894
		895	if (@{ $ns->{query_queue} } == @$queue) {
		896	if (@$queue) {
		897	$ns->send_packet ($ns->{query_queue}[0][0]);
		898	} else {
		899	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		900	}
		901	}
		902	},
		903	);
		904
		905	=item $client->coro (\&cb)
		906
		907	Create a new coroutine, running the specified callback. The coroutine will
		908	be automatically cancelled when the client gets destroyed (e.g. on logout,
		909	or loss of connection).
		910
		911	=cut
		912
		913	sub cf::client::coro {
763	my ($self, $id, %msg) = @_;	914	my ($self, $cb) = @_;
764		915
765	$msg{msgid} = $id;	916	my $coro; $coro = async {
		917	eval {
		918	$cb->();
		919	};
		920	warn $@ if $@;
		921	delete $self->{_coro}{$coro+0};
		922	};
766		923
767	$self->send ("ext " . to_json \%msg);	924	$self->{_coro}{$coro+0} = $coro;
768	}	925	}
769		926
770	#############################################################################	927	cf::client->attach (
771	# map scripting support	928	on_destroy => sub {
		929	my ($ns) = @_;
		930
		931	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		932	},
		933	);
		934
		935	=back
		936
		937
		938	=head2 SAFE SCRIPTING
		939
		940	Functions that provide a safe environment to compile and execute
		941	snippets of perl code without them endangering the safety of the server
		942	itself. Looping constructs, I/O operators and other built-in functionality
		943	is not available in the safe scripting environment, and the number of
		944	functions and methods that can be called is greatly reduced.
		945
		946	=cut
772		947
773	our $safe = new Safe "safe";	948	our $safe = new Safe "safe";
774	our $safe_hole = new Safe::Hole;	949	our $safe_hole = new Safe::Hole;
775		950
776	$SIG{FPE} = 'IGNORE';	951	$SIG{FPE} = 'IGNORE';
777		952
778	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	953	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
779		954
780	# here we export the classes and methods available to script code	955	# here we export the classes and methods available to script code
781		956
		957	=pod
		958
		959	The following fucntions and emthods are available within a safe environment:
		960
		961	cf::object contr pay_amount pay_player map
		962	cf::object::player player
		963	cf::player peaceful
		964	cf::map trigger
		965
		966	=cut
		967
782	for (	968	for (
783	["cf::object" => qw(contr pay_amount pay_player)],	969	["cf::object" => qw(contr pay_amount pay_player map)],
784	["cf::object::player" => qw(player)],	970	["cf::object::player" => qw(player)],
785	["cf::player" => qw(peaceful)],	971	["cf::player" => qw(peaceful)],
		972	["cf::map" => qw(trigger)],
786	) {	973	) {
787	no strict 'refs';	974	no strict 'refs';
788	my ($pkg, @funs) = @$_;	975	my ($pkg, @funs) = @$_;
789	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	976	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
790	for @funs;	977	for @funs;
791	}	978	}
		979
		980	=over 4
		981
		982	=item @retval = safe_eval $code, [var => value, ...]
		983
		984	Compiled and executes the given perl code snippet. additional var/value
		985	pairs result in temporary local (my) scalar variables of the given name
		986	that are available in the code snippet. Example:
		987
		988	my $five = safe_eval '$first + $second', first => 1, second => 4;
		989
		990	=cut
792		991
793	sub safe_eval($;@) {	992	sub safe_eval($;@) {
794	my ($code, %vars) = @_;	993	my ($code, %vars) = @_;
795		994
796	my $qcode = $code;	995	my $qcode = $code;
…		…
819	}	1018	}
820		1019
821	wantarray ? @res : $res[0]	1020	wantarray ? @res : $res[0]
822	}	1021	}
823		1022
		1023	=item cf::register_script_function $function => $cb
		1024
		1025	Register a function that can be called from within map/npc scripts. The
		1026	function should be reasonably secure and should be put into a package name
		1027	like the extension.
		1028
		1029	Example: register a function that gets called whenever a map script calls
		1030	C<rent::overview>, as used by the C<rent> extension.
		1031
		1032	cf::register_script_function "rent::overview" => sub {
		1033	...
		1034	};
		1035
		1036	=cut
		1037
824	sub register_script_function {	1038	sub register_script_function {
825	my ($fun, $cb) = @_;	1039	my ($fun, $cb) = @_;
826		1040
827	no strict 'refs';	1041	no strict 'refs';
828	*{"safe::$fun"} = $safe_hole->wrap ($cb);	1042	*{"safe::$fun"} = $safe_hole->wrap ($cb);
829	}	1043	}
830		1044
		1045	=back
		1046
		1047	=cut
		1048
		1049	#############################################################################
		1050
		1051	=head2 EXTENSION DATABASE SUPPORT
		1052
		1053	Crossfire maintains a very simple database for extension use. It can
		1054	currently store anything that can be serialised using Storable, which
		1055	excludes objects.
		1056
		1057	The parameter C<$family> should best start with the name of the extension
		1058	using it, it should be unique.
		1059
		1060	=over 4
		1061
		1062	=item $hashref = cf::db_get $family
		1063
		1064	Return a hashref for use by the extension C<$family>, which can be
		1065	modified. After modifications, you have to call C<cf::db_dirty> or
		1066	C<cf::db_sync>.
		1067
		1068	=item $value = cf::db_get $family => $key
		1069
		1070	Returns a single value from the database
		1071
		1072	=item cf::db_put $family => $hashref
		1073
		1074	Stores the given family hashref into the database. Updates are delayed, if
		1075	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		1076
		1077	=item cf::db_put $family => $key => $value
		1078
		1079	Stores the given C<$value> in the family hash. Updates are delayed, if you
		1080	want the data to be synced to disk immediately, use C<cf::db_sync>.
		1081
		1082	=item cf::db_dirty
		1083
		1084	Marks the database as dirty, to be updated at a later time.
		1085
		1086	=item cf::db_sync
		1087
		1088	Immediately write the database to disk I<if it is dirty>.
		1089
		1090	=cut
		1091
		1092	our $DB;
		1093
		1094	{
		1095	my $path = cf::localdir . "/database.pst";
		1096
		1097	sub db_load() {
		1098	warn "loading database $path\n";#d# remove later
		1099	$DB = stat $path ? Storable::retrieve $path : { };
		1100	}
		1101
		1102	my $pid;
		1103
		1104	sub db_save() {
		1105	warn "saving database $path\n";#d# remove later
		1106	waitpid $pid, 0 if $pid;
		1107	if (0 == ($pid = fork)) {
		1108	$DB->{_meta}{version} = 1;
		1109	Storable::nstore $DB, "$path~";
		1110	rename "$path~", $path;
		1111	cf::_exit 0 if defined $pid;
		1112	}
		1113	}
		1114
		1115	my $dirty;
		1116
		1117	sub db_sync() {
		1118	db_save if $dirty;
		1119	undef $dirty;
		1120	}
		1121
		1122	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		1123	db_sync;
		1124	});
		1125
		1126	sub db_dirty() {
		1127	$dirty = 1;
		1128	$idle->start;
		1129	}
		1130
		1131	sub db_get($;$) {
		1132	@_ >= 2
		1133	? $DB->{$_[0]}{$_[1]}
		1134	: ($DB->{$_[0]} ||= { })
		1135	}
		1136
		1137	sub db_put($$;$) {
		1138	if (@_ >= 3) {
		1139	$DB->{$_[0]}{$_[1]} = $_[2];
		1140	} else {
		1141	$DB->{$_[0]} = $_[1];
		1142	}
		1143	db_dirty;
		1144	}
		1145
		1146	cf::global->attach (
		1147	prio => 10000,
		1148	on_cleanup => sub {
		1149	db_sync;
		1150	},
		1151	);
		1152	}
		1153
831	#############################################################################	1154	#############################################################################
832	# the server's main()	1155	# the server's main()
833		1156
		1157	sub cfg_load {
		1158	open my $fh, "<:utf8", cf::confdir . "/config"
		1159	or return;
		1160
		1161	local $/;
		1162	*CFG = YAML::Syck::Load <$fh>;
		1163	}
		1164
834	sub main {	1165	sub main {
		1166	cfg_load;
		1167	db_load;
		1168	load_extensions;
835	Event::loop;	1169	Event::loop;
836	}	1170	}
837		1171
838	#############################################################################	1172	#############################################################################
839	# initialisation	1173	# initialisation
840		1174
		1175	sub _perl_reload(&) {
		1176	my ($msg) = @_;
		1177
		1178	$msg->("reloading...");
		1179
		1180	eval {
		1181	# cancel all watchers
		1182	for (Event::all_watchers) {
		1183	$_->cancel if $_->data & WF_AUTOCANCEL;
		1184	}
		1185
		1186	# unload all extensions
		1187	for (@exts) {
		1188	$msg->("unloading <$_>");
		1189	unload_extension $_;
		1190	}
		1191
		1192	# unload all modules loaded from $LIBDIR
		1193	while (my ($k, $v) = each %INC) {
		1194	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		1195
		1196	$msg->("removing <$k>");
		1197	delete $INC{$k};
		1198
		1199	$k =~ s/\.pm$//;
		1200	$k =~ s/\//::/g;
		1201
		1202	if (my $cb = $k->can ("unload_module")) {
		1203	$cb->();
		1204	}
		1205
		1206	Symbol::delete_package $k;
		1207	}
		1208
		1209	# sync database to disk
		1210	cf::db_sync;
		1211
		1212	# get rid of safe::, as good as possible
		1213	Symbol::delete_package "safe::$_"
		1214	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
		1215
		1216	# remove register_script_function callbacks
		1217	# TODO
		1218
		1219	# unload cf.pm "a bit"
		1220	delete $INC{"cf.pm"};
		1221
		1222	# don't, removes xs symbols, too,
		1223	# and global variables created in xs
		1224	#Symbol::delete_package __PACKAGE__;
		1225
		1226	# reload cf.pm
		1227	$msg->("reloading cf.pm");
		1228	require cf;
		1229	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		1230
		1231	# load config and database again
		1232	cf::cfg_load;
		1233	cf::db_load;
		1234
		1235	# load extensions
		1236	$msg->("load extensions");
		1237	cf::load_extensions;
		1238
		1239	# reattach attachments to objects
		1240	$msg->("reattach");
		1241	_global_reattach;
		1242	};
		1243	$msg->($@) if $@;
		1244
		1245	$msg->("reloaded");
		1246	};
		1247
		1248	sub perl_reload() {
		1249	_perl_reload {
		1250	warn $_[0];
		1251	print "$_[0]\n";
		1252	};
		1253	}
		1254
841	register "<global>", __PACKAGE__;	1255	register "<global>", __PACKAGE__;
842		1256
		1257	register_command "perl-reload" => sub {
		1258	my ($who, $arg) = @_;
		1259
		1260	if ($who->flag (FLAG_WIZ)) {
		1261	_perl_reload {
		1262	warn $_[0];
		1263	$who->message ($_[0]);
		1264	};
		1265	}
		1266	};
		1267
843	unshift @INC, $LIBDIR;	1268	unshift @INC, $LIBDIR;
844		1269
845	load_extensions;
846
847	$TICK_WATCHER = Event->timer (	1270	$TICK_WATCHER = Event->timer (
848	prio => 1,	1271	prio => 0,
849	at => $NEXT_TICK || 1,	1272	at => $NEXT_TICK || 1,
		1273	data => WF_AUTOCANCEL,
850	cb => sub {	1274	cb => sub {
851	cf::server_tick; # one server iteration	1275	cf::server_tick; # one server iteration
852		1276
853	my $NOW = Event::time;	1277	my $NOW = Event::time;
854	$NEXT_TICK += $TICK;	1278	$NEXT_TICK += $TICK;
855		1279
856	# if we are delayed by four ticks, skip them all	1280	# if we are delayed by four ticks or more, skip them all
857	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	1281	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;
858		1282
859	$TICK_WATCHER->at ($NEXT_TICK);	1283	$TICK_WATCHER->at ($NEXT_TICK);
860	$TICK_WATCHER->start;	1284	$TICK_WATCHER->start;
861	},	1285	},
862	);	1286	);
863		1287
		1288	IO::AIO::max_poll_time $TICK * 0.2;
		1289
		1290	Event->io (fd => IO::AIO::poll_fileno,
		1291	poll => 'r',
		1292	prio => 5,
		1293	data => WF_AUTOCANCEL,
		1294	cb => \&IO::AIO::poll_cb);
		1295
864	1	1296	1
865		1297

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