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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.48 by root, Sun Aug 27 15:24:22 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)) {	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
		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+).
		217
		218	=over 4
		219
110	=item $object->attach ($attachment, key => $value...)	220	=item $attachable->attach ($attachment, key => $value...)
111		221
112	Attach a pre-registered attachment to an object.	222	=item $attachable->detach ($attachment)
113		223
114	=item $player->attach ($attachment, key => $value...)	224	Attach/detach a pre-registered attachment to a specific object and give it
		225	the specified key/value pairs as arguments.
115		226
116	Attach a pre-registered attachment to a player.	227	Example, attach a minesweeper attachment to the given object, making it a
		228	10x10 minesweeper game:
117		229
118	=item $map->attach ($attachment, key => $value...) # not yet persistent	230	$obj->attach (minesweeper => width => 10, height => 10);
119		231
120	Attach a pre-registered attachment to a map.	232	=item $bool = $attachable->attached ($name)
121		233
122	=item cf::attach_global ...	234	Checks wether the named attachment is currently attached to the object.
123		235
124	Attach handlers for global events.	236	=item cf::CLASS->attach ...
125		237
126	This and all following C<attach_*>-functions expect any number of the	238	=item cf::CLASS->detach ...
127	following handler/hook descriptions:	239
		240	Define an anonymous attachment and attach it to all objects of the given
		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:
128		274
129	=over 4	275	=over 4
130		276
131	=item prio => $number	277	=item prio => $number
132		278
…		…
134	by another C<prio> setting). Lower priority handlers get executed	280	by another C<prio> setting). Lower priority handlers get executed
135	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
136	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
137	unless you know what you are doing.	283	unless you know what you are doing.
138		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
139	=item on_I<event> => \&cb	291	=item on_I<event> => \&cb
140		292
141	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
142	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
143	handlers are recognised generally depends on the type of object these	295	handlers are recognised generally depends on the type of object these
…		…
152	package and register them. Only handlers for eevents supported by the	304	package and register them. Only handlers for eevents supported by the
153	object/class are recognised.	305	object/class are recognised.
154		306
155	=back	307	=back
156		308
157	=item cf::attach_to_type $object_type, $subtype, ...	309	Example, define an attachment called "sockpuppet" that calls the given
		310	event handler when a monster attacks:
158		311
159	Attach handlers for a specific object type (e.g. TRANSPORT) and	312	cf::object::attachment sockpuppet =>
160	subtype. If C<$subtype> is zero or undef, matches all objects of the given	313	on_skill_attack => sub {
161	type.	314	my ($self, $victim) = @_;
		315	...
		316	}
		317	}
162		318
163	=item cf::attach_to_objects ...	319	=item $attachable->valid
164		320
165	Attach handlers to all objects. Do not use this except for debugging or	321	Just because you have a perl object does not mean that the corresponding
166	very rare events, as handlers are (obviously) called for I<all> objects in	322	C-level object still exists. If you try to access an object that has no
167	the game.	323	valid C counterpart anymore you get an exception at runtime. This method
168		324	can be used to test for existence of the C object part without causing an
169	=item cf::attach_to_players ...	325	exception.
170
171	Attach handlers to all players.
172
173	=item cf::attach_to_maps ...
174
175	Attach handlers to all maps.
176
177	=item cf:register_attachment $name, ...
178		326
179	=cut	327	=cut
180		328
181	# the following variables are defined in .xs and must not be re-created	329	# the following variables are defined in .xs and must not be re-created
182	our @CB_GLOBAL = (); # registry for all global events	330	our @CB_GLOBAL = (); # registry for all global events
		331	our @CB_ATTACHABLE = (); # registry for all attachables
183	our @CB_OBJECT = (); # all objects (should not be used except in emergency)	332	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
184	our @CB_PLAYER = ();	333	our @CB_PLAYER = ();
		334	our @CB_CLIENT = ();
185	our @CB_TYPE = (); # registry for type (cf-object class) based events	335	our @CB_TYPE = (); # registry for type (cf-object class) based events
186	our @CB_MAP = ();	336	our @CB_MAP = ();
187		337
188	my %attachment;	338	my %attachment;
189		339
190	sub _attach_cb($\%$$$) {	340	sub _attach_cb($$$$) {
191	my ($registry, $undo, $event, $prio, $cb) = @_;	341	my ($registry, $event, $prio, $cb) = @_;
192		342
193	use sort 'stable';	343	use sort 'stable';
194		344
195	$cb = [$prio, $cb];	345	$cb = [$prio, $cb];
196		346
197	@{$registry->[$event]} = sort	347	@{$registry->[$event]} = sort
198	{ $a->[0] cmp $b->[0] }	348	{ $a->[0] cmp $b->[0] }
199	@{$registry->[$event] || []}, $cb;	349	@{$registry->[$event] || []}, $cb;
200
201	push @{$undo->{cb}}, [$event, $cb];
202	}	350	}
		351
		352	# hack
		353	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
203		354
204	# attach handles attaching event callbacks	355	# attach handles attaching event callbacks
205	# the only thing the caller has to do is pass the correct	356	# the only thing the caller has to do is pass the correct
206	# registry (== where the callback attaches to).	357	# registry (== where the callback attaches to).
207	sub _attach(\@$@) {	358	sub _attach {
208	my ($registry, $klass, @arg) = @_;	359	my ($registry, $klass, @arg) = @_;
209		360
		361	my $object_type;
210	my $prio = 0;	362	my $prio = 0;
211
212	my %undo = (
213	registry => $registry,
214	cb => [],
215	);
216
217	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;	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	}
218		369
219	while (@arg) {	370	while (@arg) {
220	my $type = shift @arg;	371	my $type = shift @arg;
221		372
222	if ($type eq "prio") {	373	if ($type eq "prio") {
223	$prio = shift @arg;	374	$prio = shift @arg;
224		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
225	} elsif ($type eq "package") {	385	} elsif ($type eq "package") {
226	my $pkg = shift @arg;	386	my $pkg = shift @arg;
227		387
228	while (my ($name, $id) = each %cb_id) {	388	while (my ($name, $id) = each %cb_id) {
229	if (my $cb = $pkg->can ($name)) {	389	if (my $cb = $pkg->can ($name)) {
230	_attach_cb $registry, %undo, $id, $prio, $cb;	390	_attach_cb $registry, $id, $prio, $cb;
231	}	391	}
232	}	392	}
233		393
234	} elsif (exists $cb_id{$type}) {	394	} elsif (exists $cb_id{$type}) {
235	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;	395	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
236		396
237	} elsif (ref $type) {	397	} elsif (ref $type) {
238	warn "attaching objects not supported, ignoring.\n";	398	warn "attaching objects not supported, ignoring.\n";
239		399
240	} else {	400	} else {
241	shift @arg;	401	shift @arg;
242	warn "attach argument '$type' not supported, ignoring.\n";	402	warn "attach argument '$type' not supported, ignoring.\n";
243	}	403	}
244	}	404	}
245
246	\%undo
247	}	405	}
248		406
249	sub _attach_attachment {	407	sub _object_attach {
250	my ($obj, $name, %arg) = @_;	408	my ($obj, $name, %arg) = @_;
251		409
252	my $res;	410	return if exists $obj->{_attachment}{$name};
253		411
254	if (my $attach = $attachment{$name}) {	412	if (my $attach = $attachment{$name}) {
255	my $registry = $obj->registry;	413	my $registry = $obj->registry;
256		414
257	for (@$attach) {	415	for (@$attach) {
258	my ($klass, @attach) = @$_;	416	my ($klass, @attach) = @$_;
259	$res = _attach @$registry, $klass, @attach;	417	_attach $registry, $klass, @attach;
260	}	418	}
261		419
262	$obj->{$name} = \%arg;	420	$obj->{$name} = \%arg;
263	} else {	421	} else {
264	warn "object uses attachment '$name' that is not available, postponing.\n";	422	warn "object uses attachment '$name' that is not available, postponing.\n";
265	}	423	}
266		424
267	push @{$obj->{_attachment}}, $name;	425	$obj->{_attachment}{$name} = undef;
268
269	$res->{attachment} = $name;
270	$res
271	}	426	}
272		427
273	sub cf::object::attach {	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 {
274	my ($obj, $name, %arg) = @_;	438	my ($obj, $name) = @_;
275		439
276	_attach_attachment $obj, $name, %arg;	440	if (ref $obj) {
277	}	441	delete $obj->{_attachment}{$name};
		442	reattach ($obj);
		443	} else {
		444	Carp::croak "cannot, currently, detach class attachments";
		445	}
		446	};
278		447
279	sub cf::player::attach {	448	sub cf::attachable::attached {
280	my ($obj, $name, %arg) = @_;	449	my ($obj, $name) = @_;
281		450
282	_attach_attachment KLASS_PLAYER, $obj, $name, %arg;	451	exists $obj->{_attachment}{$name}
283	}	452	}
284		453
285	sub cf::map::attach {	454	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
286	my ($obj, $name, %arg) = @_;	455	eval "#line " . __LINE__ . " 'cf.pm'
		456	sub cf::\L$klass\E::_attach_registry {
		457	(\\\@CB_$klass, KLASS_$klass)
		458	}
287		459
288	_attach_attachment KLASS_MAP, $obj, $name, %arg;	460	sub cf::\L$klass\E::attachment {
289	}
290
291	sub attach_global {
292	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
293	}
294
295	sub attach_to_type {
296	my $type = shift;
297	my $subtype = shift;
298
299	_attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, 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;	461	my \$name = shift;
316		462
317	$attachment{$name} = [[KLASS_OBJECT, @_]];	463	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		464	}
		465	";
		466	die if $@;
318	}	467	}
319		468
320	our $override;	469	our $override;
321	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?	470	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
322		471
…		…
336	for (@$callbacks) {	485	for (@$callbacks) {
337	eval { &{$_->[1]} };	486	eval { &{$_->[1]} };
338		487
339	if ($@) {	488	if ($@) {
340	warn "$@";	489	warn "$@";
341	warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";	490	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
342	override;	491	override;
343	}	492	}
344		493
345	return 1 if $override;	494	return 1 if $override;
346	}	495	}
347		496
348	0	497	0
349	}	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
		510	=back
		511
		512	=cut
350		513
351	#############################################################################	514	#############################################################################
352	# object support	515	# object support
353		516
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 {	517	sub reattach {
		518	# basically do the same as instantiate, without calling instantiate
367	my ($obj) = @_;	519	my ($obj) = @_;
		520
368	my $registry = $obj->registry;	521	my $registry = $obj->registry;
369		522
370	@$registry = ();	523	@$registry = ();
371		524
		525	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		526
372	for my $name (@{ $obj->{_attachment} }) {	527	for my $name (keys %{ $obj->{_attachment} || {} }) {
373	if (my $attach = $attachment{$name}) {	528	if (my $attach = $attachment{$name}) {
374	for (@$attach) {	529	for (@$attach) {
375	my ($klass, @attach) = @$_;	530	my ($klass, @attach) = @$_;
376	_attach @$registry, $klass, @attach;	531	_attach $registry, $klass, @attach;
377	}	532	}
378	} else {	533	} else {
379	warn "object uses attachment '$name' that is not available, postponing.\n";	534	warn "object uses attachment '$name' that is not available, postponing.\n";
380	}	535	}
381	}	536	}
382	}	537	}
383		538
		539	cf::attachable->attach (
		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,
		553	on_clone => sub {
		554	my ($src, $dst) = @_;
		555
		556	@{$dst->registry} = @{$src->registry};
		557
		558	%$dst = %$src;
		559
		560	%{$dst->{_attachment}} = %{$src->{_attachment}}
		561	if exists $src->{_attachment};
		562	},
		563	);
		564
384	sub object_freezer_save {	565	sub object_freezer_save {
385	my ($filename, $objs) = @_;	566	my ($filename, $rdata, $objs) = @_;
386		567
387	$filename .= ".pst";	568	if (length $$rdata) {
		569	warn sprintf "saving %s (%d,%d)\n",
		570	$filename, length $$rdata, scalar @$objs;
388		571
389	if (@$objs) {
390	open my $fh, ">:raw", "$filename~";	572	if (open my $fh, ">:raw", "$filename~") {
391	chmod $fh, SAVE_MODE;	573	chmod SAVE_MODE, $fh;
		574	syswrite $fh, $$rdata;
		575	close $fh;
		576
		577	if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
		578	chmod SAVE_MODE, $fh;
392	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };	579	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
393	close $fh;	580	close $fh;
		581	rename "$filename.pst~", "$filename.pst";
		582	} else {
		583	unlink "$filename.pst";
		584	}
		585
394	rename "$filename~", $filename;	586	rename "$filename~", $filename;
		587	} else {
		588	warn "FATAL: $filename~: $!\n";
		589	}
395	} else {	590	} else {
396	unlink $filename;	591	unlink $filename;
		592	unlink "$filename.pst";
397	}	593	}
		594	}
		595
		596	sub object_freezer_as_string {
		597	my ($rdata, $objs) = @_;
		598
		599	use Data::Dumper;
		600
		601	$$rdata . Dumper $objs
398	}	602	}
399		603
400	sub object_thawer_load {	604	sub object_thawer_load {
401	my ($filename) = @_;	605	my ($filename) = @_;
402		606
		607	local $/;
		608
		609	my $av;
		610
		611	#TODO: use sysread etc.
		612	if (open my $data, "<:raw:perlio", $filename) {
		613	$data = <$data>;
403	open my $fh, "<:raw:perlio", "$filename.pst"	614	if (open my $pst, "<:raw:perlio", "$filename.pst") {
404	or return;	615	$av = eval { (Storable::thaw <$pst>)->{objs} };
405		616	}
406	eval { local $/; (Storable::thaw <$fh>)->{objs} }	617	return ($data, $av);
407	}
408
409	attach_to_objects
410	prio => -1000000,
411	on_clone => sub {
412	my ($src, $dst) = @_;
413
414	@{$dst->registry} = @{$src->registry};
415
416	%$dst = %$src;
417
418	$dst->{_attachment} = [@{ $src->{_attachment} }]
419	if exists $src->{_attachment};
420	},	618	}
421	;	619
		620	()
		621	}
422		622
423	#############################################################################	623	#############################################################################
424	# old plug-in events	624	# command handling &c
425		625
426	sub inject_event {	626	=item cf::register_command $name => \&callback($ob,$args);
427	my $extension = shift;
428	my $event_code = shift;
429		627
430	my $cb = $hook[$event_code]{$extension}	628	Register a callback for execution when the client sends the user command
431	or return;	629	$name.
432		630
433	&$cb	631	=cut
434	}
435
436	sub inject_global_event {
437	my $event = shift;
438
439	my $cb = $hook[$event]
440	or return;
441
442	List::Util::max map &$_, values %$cb
443	}
444
445	sub inject_command {
446	my ($name, $obj, $params) = @_;
447
448	for my $cmd (@{ $command{$name} }) {
449	$cmd->[1]->($obj, $params);
450	}
451
452	-1
453	}
454		632
455	sub register_command {	633	sub register_command {
456	my ($name, $time, $cb) = @_;	634	my ($name, $cb) = @_;
457		635
458	my $caller = caller;	636	my $caller = caller;
459	#warn "registering command '$name/$time' to '$caller'";	637	#warn "registering command '$name/$time' to '$caller'";
460		638
461	push @{ $command{$name} }, [$time, $cb, $caller];	639	push @{ $COMMAND{$name} }, [$caller, $cb];
462	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
463	}	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
464		650
465	sub register_extcmd {	651	sub register_extcmd {
466	my ($name, $cb) = @_;	652	my ($name, $cb) = @_;
467		653
468	my $caller = caller;	654	my $caller = caller;
469	#warn "registering extcmd '$name' to '$caller'";	655	#warn "registering extcmd '$name' to '$caller'";
470		656
471	$extcmd{$name} = [$cb, $caller];	657	$EXTCMD{$name} = [$cb, $caller];
472	}	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	);
473		691
474	sub register {	692	sub register {
475	my ($base, $pkg) = @_;	693	my ($base, $pkg) = @_;
476		694
477	#TODO	695	#TODO
…		…
496	. "#line 1 \"$path\"\n{\n"	714	. "#line 1 \"$path\"\n{\n"
497	. (do { local $/; <$fh> })	715	. (do { local $/; <$fh> })
498	. "\n};\n1";	716	. "\n};\n1";
499		717
500	eval $source	718	eval $source
501	or die "$path: $@";	719	or die $@ ? "$path: $@\n"
		720	: "extension disabled.\n";
502		721
503	push @exts, $pkg;	722	push @exts, $pkg;
504	$ext_pkg{$base} = $pkg;	723	$ext_pkg{$base} = $pkg;
505		724
506	# no strict 'refs';	725	# no strict 'refs';
…		…
519	# for my $idx (0 .. $#PLUGIN_EVENT) {	738	# for my $idx (0 .. $#PLUGIN_EVENT) {
520	# delete $hook[$idx]{$pkg};	739	# delete $hook[$idx]{$pkg};
521	# }	740	# }
522		741
523	# remove commands	742	# remove commands
524	for my $name (keys %command) {	743	for my $name (keys %COMMAND) {
525	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	744	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
526		745
527	if (@cb) {	746	if (@cb) {
528	$command{$name} = \@cb;	747	$COMMAND{$name} = \@cb;
529	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
530	} else {	748	} else {
531	delete $command{$name};
532	delete $COMMAND{"$name\000"};	749	delete $COMMAND{$name};
533	}	750	}
534	}	751	}
535		752
536	# remove extcmds	753	# remove extcmds
537	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	754	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
538	delete $extcmd{$name};	755	delete $EXTCMD{$name};
539	}	756	}
540		757
541	if (my $cb = $pkg->can ("unload")) {	758	if (my $cb = $pkg->can ("unload")) {
542	eval {	759	eval {
543	$cb->($pkg);	760	$cb->($pkg);
…		…
547		764
548	Symbol::delete_package $pkg;	765	Symbol::delete_package $pkg;
549	}	766	}
550		767
551	sub load_extensions {	768	sub load_extensions {
552	my $LIBDIR = maps_directory "perl";
553
554	for my $ext (<$LIBDIR/*.ext>) {	769	for my $ext (<$LIBDIR/*.ext>) {
555	next unless -r $ext;	770	next unless -r $ext;
556	eval {	771	eval {
557	load_extension $ext;	772	load_extension $ext;
558	1	773	1
559	} or warn "$ext not loaded: $@";	774	} or warn "$ext not loaded: $@";
560	}	775	}
561	}	776	}
562		777
563	sub _perl_reload(&) {
564	my ($msg) = @_;
565
566	$msg->("reloading...");
567
568	eval {
569	# 1. cancel all watchers
570	$_->cancel for Event::all_watchers;
571
572	# 2. unload all extensions
573	for (@exts) {
574	$msg->("unloading <$_>");
575	unload_extension $_;
576	}
577
578	# 3. unload all modules loaded from $LIBDIR
579	while (my ($k, $v) = each %INC) {
580	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
581
582	$msg->("removing <$k>");
583	delete $INC{$k};
584
585	$k =~ s/\.pm$//;
586	$k =~ s/\//::/g;
587
588	if (my $cb = $k->can ("unload_module")) {
589	$cb->();
590	}
591
592	Symbol::delete_package $k;
593	}
594
595	# 4. get rid of safe::, as good as possible
596	Symbol::delete_package "safe::$_"
597	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
598
599	# 5. remove register_script_function callbacks
600	# TODO
601
602	# 6. unload cf.pm "a bit"
603	delete $INC{"cf.pm"};
604
605	# don't, removes xs symbols, too,
606	# and global variables created in xs
607	#Symbol::delete_package __PACKAGE__;
608
609	# 7. reload cf.pm
610	$msg->("reloading cf.pm");
611	require cf;
612	};
613	$msg->($@) if $@;
614
615	$msg->("reloaded");
616	};
617
618	sub perl_reload() {
619	_perl_reload {
620	warn $_[0];
621	print "$_[0]\n";
622	};
623	}
624
625	register_command "perl-reload", 0, sub {
626	my ($who, $arg) = @_;
627
628	if ($who->flag (FLAG_WIZ)) {
629	_perl_reload {
630	warn $_[0];
631	$who->message ($_[0]);
632	};
633	}
634	};
635
636	#############################################################################
637	# extcmd framework, basically convert ext <msg>
638	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
639
640	attach_to_players
641	on_extcmd => sub {
642	my ($pl, $buf) = @_;
643
644	my $msg = eval { from_json $buf };
645
646	if (ref $msg) {
647	if (my $cb = $extcmd{$msg->{msgtype}}) {
648	if (my %reply = $cb->[0]->($pl, $msg)) {
649	$pl->ext_reply ($msg->{msgid}, %reply);
650	}
651	}
652	} else {
653	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
654	}
655
656	cf::override;
657	},
658	;
659
660	#############################################################################	778	#############################################################################
661	# load/save/clean perl data associated with a map	779	# load/save/clean perl data associated with a map
662		780
663	*cf::mapsupport::on_clean = sub {	781	*cf::mapsupport::on_clean = sub {
664	my ($map) = @_;	782	my ($map) = @_;
665		783
666	my $path = $map->tmpname;	784	my $path = $map->tmpname;
667	defined $path or return;	785	defined $path or return;
668		786
669	unlink "$path.cfperl";
670	unlink "$path.pst";	787	unlink "$path.pst";
671	};	788	};
672		789
673	*cf::mapsupport::on_swapin =
674	*cf::mapsupport::on_load = sub {
675	my ($map) = @_;
676
677	my $path = $map->tmpname;
678	$path = $map->path unless defined $path;
679
680	open my $fh, "<:raw", "$path.cfperl"
681	or return; # no perl data
682
683	my $data = Storable::thaw do { local $/; <$fh> };
684
685	$data->{version} <= 1
686	or return; # too new
687
688	$map->_set_obs ($data->{obs});
689	};
690
691	attach_to_maps prio => -10000, package => cf::mapsupport::;	790	cf::map->attach (prio => -10000, package => cf::mapsupport::);
692		791
693	#############################################################################	792	#############################################################################
694	# load/save perl data associated with player->ob objects	793	# load/save perl data associated with player->ob objects
695		794
696	sub all_objects(@) {	795	sub all_objects(@) {
697	@_, map all_objects ($_->inv), @_	796	@_, map all_objects ($_->inv), @_
698	}	797	}
699		798
700	attach_to_players	799	# TODO: compatibility cruft, remove when no longer needed
		800	cf::player->attach (
701	on_load => sub {	801	on_load => sub {
702	my ($pl, $path) = @_;	802	my ($pl, $path) = @_;
703		803
704	for my $o (all_objects $pl->ob) {	804	for my $o (all_objects $pl->ob) {
705	if (my $value = $o->get_ob_key_value ("_perl_data")) {	805	if (my $value = $o->get_ob_key_value ("_perl_data")) {
…		…
707		807
708	%$o = %{ Storable::thaw pack "H*", $value };	808	%$o = %{ Storable::thaw pack "H*", $value };
709	}	809	}
710	}	810	}
711	},	811	},
712	;	812	);
713		813
714	#############################################################################	814	#############################################################################
715	# 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
716		823
717	=item cf::player::exists $login	824	=item cf::player::exists $login
718		825
719	Returns true when the given account exists.	826	Returns true when the given account exists.
720		827
…		…
723	sub cf::player::exists($) {	830	sub cf::player::exists($) {
724	cf::player::find $_[0]	831	cf::player::find $_[0]
725	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;
726	}	833	}
727		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
728	=item $player->reply ($npc, $msg[, $flags])	855	=item $player_object->reply ($npc, $msg[, $flags])
729		856
730	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	857	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
731	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
732	dialogue with the given NPC character.	859	dialogue with the given NPC character.
733		860
734	=cut	861	=cut
735		862
736	# rough implementation of a future "reply" method that works	863	# rough implementation of a future "reply" method that works
737	# with dialog boxes.	864	# with dialog boxes.
		865	#TODO: the first argument must go, split into a $npc->reply_to ( method
738	sub cf::object::player::reply($$$;$) {	866	sub cf::object::player::reply($$$;$) {
739	my ($self, $npc, $msg, $flags) = @_;	867	my ($self, $npc, $msg, $flags) = @_;
740		868
741	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	869	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
742		870
…		…
746	$msg = $npc->name . " says: $msg" if $npc;	874	$msg = $npc->name . " says: $msg" if $npc;
747	$self->message ($msg, $flags);	875	$self->message ($msg, $flags);
748	}	876	}
749	}	877	}
750		878
751	=item $player->ext_reply ($msgid, $msgtype, %msg)	879	=item $player_object->may ("access")
752		880
753	Sends an ext reply to the player.	881	Returns wether the given player is authorized to access resource "access"
		882	(e.g. "command_wizcast").
754		883
755	=cut	884	=cut
756		885
757	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 {
758	my ($self, $id, %msg) = @_;	972	my ($self, $cb) = @_;
759		973
760	$msg{msgid} = $id;	974	my $coro; $coro = async {
		975	eval {
		976	$cb->();
		977	};
		978	warn $@ if $@;
		979	};
761		980
762	$self->send ("ext " . to_json \%msg);	981	$coro->on_destroy (sub {
763	}	982	delete $self->{_coro}{$coro+0};
		983	});
764		984
765	#############################################################################	985	$self->{_coro}{$coro+0} = $coro;
766	# 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
767		1010
768	our $safe = new Safe "safe";	1011	our $safe = new Safe "safe";
769	our $safe_hole = new Safe::Hole;	1012	our $safe_hole = new Safe::Hole;
770		1013
771	$SIG{FPE} = 'IGNORE';	1014	$SIG{FPE} = 'IGNORE';
772		1015
773	$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));
774		1017
775	# here we export the classes and methods available to script code	1018	# here we export the classes and methods available to script code
776		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
777	for (	1031	for (
778	["cf::object" => qw(contr pay_amount pay_player)],	1032	["cf::object" => qw(contr pay_amount pay_player map)],
779	["cf::object::player" => qw(player)],	1033	["cf::object::player" => qw(player)],
780	["cf::player" => qw(peaceful)],	1034	["cf::player" => qw(peaceful)],
		1035	["cf::map" => qw(trigger)],
781	) {	1036	) {
782	no strict 'refs';	1037	no strict 'refs';
783	my ($pkg, @funs) = @$_;	1038	my ($pkg, @funs) = @$_;
784	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	1039	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
785	for @funs;	1040	for @funs;
786	}	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
787		1054
788	sub safe_eval($;@) {	1055	sub safe_eval($;@) {
789	my ($code, %vars) = @_;	1056	my ($code, %vars) = @_;
790		1057
791	my $qcode = $code;	1058	my $qcode = $code;
…		…
814	}	1081	}
815		1082
816	wantarray ? @res : $res[0]	1083	wantarray ? @res : $res[0]
817	}	1084	}
818		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
819	sub register_script_function {	1101	sub register_script_function {
820	my ($fun, $cb) = @_;	1102	my ($fun, $cb) = @_;
821		1103
822	no strict 'refs';	1104	no strict 'refs';
823	*{"safe::$fun"} = $safe_hole->wrap ($cb);	1105	*{"safe::$fun"} = $safe_hole->wrap ($cb);
824	}	1106	}
825		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
826	#############################################################################	1217	#############################################################################
827	# the server's main()	1218	# the server's main()
828		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
829	sub main {	1228	sub main {
		1229	cfg_load;
		1230	db_load;
		1231	load_extensions;
830	Event::loop;	1232	Event::loop;
831	}	1233	}
832		1234
833	#############################################################################	1235	#############################################################################
834	# initialisation	1236	# initialisation
835		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 $@;
		1314
		1315	warn "reloaded";
		1316	};
		1317
		1318	sub perl_reload() {
		1319	_perl_reload;
		1320	}
		1321
836	register "<global>", __PACKAGE__;	1322	register "<global>", __PACKAGE__;
837		1323
		1324	register_command "perl-reload" => sub {
		1325	my ($who, $arg) = @_;
		1326
		1327	if ($who->flag (FLAG_WIZ)) {
		1328	$who->message ("reloading...");
		1329	_perl_reload;
		1330	}
		1331	};
		1332
838	unshift @INC, $LIBDIR;	1333	unshift @INC, $LIBDIR;
839		1334
840	load_extensions;
841
842	$TICK_WATCHER = Event->timer (	1335	$TICK_WATCHER = Event->timer (
		1336	reentrant => 0,
843	prio => 1,	1337	prio => 0,
844	at => $NEXT_TICK || 1,	1338	at => $NEXT_TICK || $TICK,
		1339	data => WF_AUTOCANCEL,
845	cb => sub {	1340	cb => sub {
		1341	unless ($FREEZE) {
846	cf::server_tick; # one server iteration	1342	cf::server_tick; # one server iteration
		1343	$RUNTIME += $TICK;
		1344	}
847		1345
848	my $NOW = Event::time;
849	$NEXT_TICK += $TICK;	1346	$NEXT_TICK += $TICK;
850		1347
851	# if we are delayed by four ticks, skip them all	1348	# if we are delayed by four ticks or more, skip them all
852	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	1349	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
853		1350
854	$TICK_WATCHER->at ($NEXT_TICK);	1351	$TICK_WATCHER->at ($NEXT_TICK);
855	$TICK_WATCHER->start;	1352	$TICK_WATCHER->start;
856	},	1353	},
857	);	1354	);
858		1355
859	_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	};
860		1372
861	1	1373	1
862		1374

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