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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.53 by root, Tue Aug 29 13:11:58 2006 UTC vs.
Revision 1.108 by root, Sun Dec 31 21:02:05 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	use Coro::AIO;
		19
		20	use Digest::MD5;
		21	use Fcntl;
		22	use IO::AIO 2.31 ();
		23	use YAML::Syck ();
10	use Time::HiRes;	24	use Time::HiRes;
11	use Event;	25
12	$Event::Eval = 1; # no idea why this is required, but it is	26	use Event; $Event::Eval = 1; # no idea why this is required, but it is
13		27
14	use strict;	28	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		29	$YAML::Syck::ImplicitUnicode = 1;
15		30
16	_reload_1;	31	$Coro::main->prio (2); # run main coroutine ("the server") with very high priority
17		32
		33	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		34
18	our %COMMAND = ();	35	our %COMMAND = ();
		36	our %COMMAND_TIME = ();
		37	our %EXTCMD = ();
		38
19	our @EVENT;	39	our @EVENT;
20	our %PROP_TYPE;	40	our $LIBDIR = datadir . "/ext";
21	our %PROP_IDX;
22	our $LIBDIR = maps_directory "perl";
23		41
24	our $TICK = MAX_TIME * 1e-6;	42	our $TICK = MAX_TIME * 1e-6;
25	our $TICK_WATCHER;	43	our $TICK_WATCHER;
26	our $NEXT_TICK;	44	our $NEXT_TICK;
		45	our $NOW;
		46
		47	our %CFG;
		48
		49	our $UPTIME; $UPTIME ||= time;
		50	our $RUNTIME;
		51
		52	our %MAP; # all maps
		53	our $LINK_MAP; # the special {link} map
		54	our $FREEZE;
		55	our $RANDOM_MAPS = cf::localdir . "/random";
		56	our %EXT_CORO;
		57
		58	binmode STDOUT;
		59	binmode STDERR;
		60
		61	# read virtual server time, if available
		62	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		63	open my $fh, "<", cf::localdir . "/runtime"
		64	or die "unable to read runtime file: $!";
		65	$RUNTIME = <$fh> + 0.;
		66	}
		67
		68	mkdir cf::localdir;
		69	mkdir cf::localdir . "/" . cf::playerdir;
		70	mkdir cf::localdir . "/" . cf::tmpdir;
		71	mkdir cf::localdir . "/" . cf::uniquedir;
		72	mkdir $RANDOM_MAPS;
		73
		74	# a special map that is always available
		75	our $LINK_MAP;
		76
		77	#############################################################################
		78
		79	=head2 GLOBAL VARIABLES
		80
		81	=over 4
		82
		83	=item $cf::UPTIME
		84
		85	The timestamp of the server start (so not actually an uptime).
		86
		87	=item $cf::RUNTIME
		88
		89	The time this server has run, starts at 0 and is increased by $cf::TICK on
		90	every server tick.
		91
		92	=item $cf::LIBDIR
		93
		94	The perl library directory, where extensions and cf-specific modules can
		95	be found. It will be added to C<@INC> automatically.
		96
		97	=item $cf::NOW
		98
		99	The time of the last (current) server tick.
		100
		101	=item $cf::TICK
		102
		103	The interval between server ticks, in seconds.
		104
		105	=item %cf::CFG
		106
		107	Configuration for the server, loaded from C</etc/crossfire/config>, or
		108	from wherever your confdir points to.
		109
		110	=back
		111
		112	=cut
27		113
28	BEGIN {	114	BEGIN {
29	*CORE::GLOBAL::warn = sub {	115	*CORE::GLOBAL::warn = sub {
30	my $msg = join "", @_;	116	my $msg = join "", @_;
		117	utf8::encode $msg;
		118
31	$msg .= "\n"	119	$msg .= "\n"
32	unless $msg =~ /\n$/;	120	unless $msg =~ /\n$/;
33		121
34	print STDERR "cfperl: $msg";
35	LOG llevError, "cfperl: $msg";	122	LOG llevError, "cfperl: $msg";
36	};	123	};
37	}	124	}
38		125
39	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	126	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
40		127	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
41	# generate property mutators	128	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
42	sub prop_gen {	129	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
43	my ($prefix, $class) = @_;	130	@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';	131	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
74		132
75	# we bless all objects into (empty) derived classes to force a method lookup	133	# we bless all objects into (empty) derived classes to force a method lookup
76	# within the Safe compartment.	134	# within the Safe compartment.
77	for my $pkg (qw(cf::object cf::object::player cf::player cf::map cf::party cf::region cf::arch cf::living)) {	135	for my $pkg (qw(
		136	cf::global cf::attachable
		137	cf::object cf::object::player
		138	cf::client cf::player
		139	cf::arch cf::living
		140	cf::map cf::party cf::region
		141	)) {
78	no strict 'refs';	142	no strict 'refs';
79	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	143	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
80	}	144	}
81		145
82	$Event::DIED = sub {	146	$Event::DIED = sub {
…		…
84	};	148	};
85		149
86	my %ext_pkg;	150	my %ext_pkg;
87	my @exts;	151	my @exts;
88	my @hook;	152	my @hook;
89	my %command;
90	my %extcmd;
91		153
92	#############################################################################	154	=head2 UTILITY FUNCTIONS
93	# utility functions	155
		156	=over 4
		157
		158	=cut
94		159
95	use JSON::Syck (); # TODO# replace by JSON::PC once working	160	use JSON::Syck (); # TODO# replace by JSON::PC once working
		161
		162	=item $ref = cf::from_json $json
		163
		164	Converts a JSON string into the corresponding perl data structure.
		165
		166	=cut
96		167
97	sub from_json($) {	168	sub from_json($) {
98	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs	169	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
99	JSON::Syck::Load $_[0]	170	JSON::Syck::Load $_[0]
100	}	171	}
101		172
		173	=item $json = cf::to_json $ref
		174
		175	Converts a perl data structure into its JSON representation.
		176
		177	=cut
		178
102	sub to_json($) {	179	sub to_json($) {
103	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs	180	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
104	JSON::Syck::Dump $_[0]	181	JSON::Syck::Dump $_[0]
105	}	182	}
106		183
		184	=item cf::sync_job { BLOCK }
		185
		186	The design of crossfire+ requires that the main coro ($Coro::main) is
		187	always able to handle events or runnable, as crossfire+ is only partly
		188	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		189
		190	If it must be done, put the blocking parts into C<sync_job>. This will run
		191	the given BLOCK in another coroutine while waiting for the result. The
		192	server will be frozen during this time, so the block should either finish
		193	fast or be very important.
		194
		195	=cut
		196
		197	sub sync_job(&) {
		198	my ($job) = @_;
		199
		200	my $busy = 1;
		201	my @res;
		202
		203	# TODO: use suspend/resume instead
		204	local $FREEZE = 1;
		205
		206	my $coro = Coro::async {
		207	@res = eval { $job->() };
		208	warn $@ if $@;
		209	undef $busy;
		210	};
		211
		212	if ($Coro::current == $Coro::main) {
		213	$coro->prio (Coro::PRIO_MAX);
		214	while ($busy) {
		215	Coro::cede_notself;
		216	Event::one_event unless Coro::nready;
		217	}
		218	} else {
		219	$coro->join;
		220	}
		221
		222	wantarray ? @res : $res[0]
		223	}
		224
		225	=item $coro = cf::coro { BLOCK }
		226
		227	Creates and returns a new coro. This coro is automcatially being canceled
		228	when the extension calling this is being unloaded.
		229
		230	=cut
		231
		232	sub coro(&) {
		233	my $cb = shift;
		234
		235	my $coro; $coro = async {
		236	eval {
		237	$cb->();
		238	};
		239	warn $@ if $@;
		240	};
		241
		242	$coro->on_destroy (sub {
		243	delete $EXT_CORO{$coro+0};
		244	});
		245	$EXT_CORO{$coro+0} = $coro;
		246
		247	$coro
		248	}
		249
		250	sub write_runtime {
		251	my $runtime = cf::localdir . "/runtime";
		252
		253	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
		254	or return;
		255
		256	my $value = $cf::RUNTIME;
		257	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		258	and return;
		259
		260	aio_fsync $fh
		261	and return;
		262
		263	close $fh
		264	or return;
		265
		266	aio_rename "$runtime~", $runtime
		267	and return;
		268
		269	1
		270	}
		271
		272	=back
		273
		274	=cut
		275
107	#############################################################################	276	#############################################################################
108	# "new" plug-in system
109		277
110	=item $object->attach ($attachment, key => $value...)	278	package cf::path;
111		279
112	=item $object->detach ($attachment)	280	sub new {
		281	my ($class, $path, $base) = @_;
113		282
114	Attach/detach a pre-registered attachment to an object.	283	my $self = bless { }, $class;
115		284
116	=item $player->attach ($attachment, key => $value...)	285	if ($path =~ s{^\?random/}{}) {
		286	$self->{random} = cf::from_json $path;
		287	} else {
		288	if ($path =~ s{^~([^/]+)?}{}) {
		289	$self->{user_rel} = 1;
117		290
118	=item $player->detach ($attachment)	291	if (defined $1) {
		292	$self->{user} = $1;
		293	} elsif ($base =~ m{^~([^/]+)/}) {
		294	$self->{user} = $1;
		295	} else {
		296	warn "cannot resolve user-relative path without user <$path,$base>\n";
		297	}
		298	} elsif ($path =~ /^\//) {
		299	# already absolute
		300	} else {
		301	$base =~ s{[^/]+/?$}{};
		302	return $class->new ("$base/$path");
		303	}
119		304
120	Attach/detach a pre-registered attachment to a player.	305	for ($path) {
		306	redo if s{/\.?/}{/};
		307	redo if s{/[^/]+/\.\./}{/};
		308	}
		309	}
121		310
		311	$self->{path} = $path;
		312
		313	$self
		314	}
		315
		316	# the name / primary key / in-game path
		317	sub as_string {
		318	my ($self) = @_;
		319
		320	$self->{user_rel} ? "~$self->{user}$self->{path}"
		321	: $self->{random} ? "?random/$self->{path}"
		322	: $self->{path}
		323	}
		324
		325	# the displayed name, this is a one way mapping
		326	sub visible_name {
		327	my ($self) = @_;
		328
		329	$self->{random} ? "?random/$self->{random}{origin_map}+$self->{random}{origin_x}+$self->{random}{origin_y}/$self->{random}{dungeon_level}"
		330	: $self->as_string
		331	}
		332
		333	# escape the /'s in the path
		334	sub _escaped_path {
		335	# ∕ is U+2215
		336	(my $path = $_[0]{path}) =~ s/\//∕/g;
		337	$path
		338	}
		339
		340	# the original (read-only) location
		341	sub load_path {
		342	my ($self) = @_;
		343
		344	sprintf "%s/%s/%s", cf::datadir, cf::mapdir, $self->{path}
		345	}
		346
		347	# the temporary/swap location
		348	sub save_path {
		349	my ($self) = @_;
		350
		351	$self->{user_rel} ? sprintf "%s/%s/%s/%s", cf::localdir, cf::playerdir, $self->{user}, $self->_escaped_path
		352	: $self->{random} ? sprintf "%s/%s", $RANDOM_MAPS, Digest::MD5::md5_hex $self->{path}
		353	: sprintf "%s/%s/%s", cf::localdir, cf::tmpdir, $self->_escaped_path
		354	}
		355
		356	# the unique path, might be eq to save_path
		357	sub uniq_path {
		358	my ($self) = @_;
		359
		360	$self->{user_rel} || $self->{random}
		361	? undef
		362	: sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $self->_escaped_path
		363	}
		364
		365	# return random map parameters, or undef
		366	sub random_map_params {
		367	my ($self) = @_;
		368
		369	$self->{random}
		370	}
		371
		372	# this is somewhat ugly, but style maps do need special treatment
		373	sub is_style_map {
		374	$_[0]{path} =~ m{^/styles/}
		375	}
		376
		377	package cf;
		378
		379	#############################################################################
		380
		381	=head2 ATTACHABLE OBJECTS
		382
		383	Many objects in crossfire are so-called attachable objects. That means you can
		384	attach callbacks/event handlers (a collection of which is called an "attachment")
		385	to it. All such attachable objects support the following methods.
		386
		387	In the following description, CLASS can be any of C<global>, C<object>
		388	C<player>, C<client> or C<map> (i.e. the attachable objects in
		389	crossfire+).
		390
		391	=over 4
		392
122	=item $map->attach ($attachment, key => $value...)	393	=item $attachable->attach ($attachment, key => $value...)
123		394
124	=item $map->detach ($attachment)	395	=item $attachable->detach ($attachment)
125		396
126	Attach/detach a pre-registered attachment to a map.	397	Attach/detach a pre-registered attachment to a specific object and give it
		398	the specified key/value pairs as arguments.
127		399
128	=item cf::attach_global ...	400	Example, attach a minesweeper attachment to the given object, making it a
		401	10x10 minesweeper game:
129		402
130	Attach handlers for global events.	403	$obj->attach (minesweeper => width => 10, height => 10);
131		404
132	This and all following C<attach_*>-functions expect any number of the	405	=item $bool = $attachable->attached ($name)
133	following handler/hook descriptions:	406
		407	Checks wether the named attachment is currently attached to the object.
		408
		409	=item cf::CLASS->attach ...
		410
		411	=item cf::CLASS->detach ...
		412
		413	Define an anonymous attachment and attach it to all objects of the given
		414	CLASS. See the next function for an explanation of its arguments.
		415
		416	You can attach to global events by using the C<cf::global> class.
		417
		418	Example, log all player logins:
		419
		420	cf::player->attach (
		421	on_login => sub {
		422	my ($pl) = @_;
		423	...
		424	},
		425	);
		426
		427	Example, attach to the jeweler skill:
		428
		429	cf::object->attach (
		430	type => cf::SKILL,
		431	subtype => cf::SK_JEWELER,
		432	on_use_skill => sub {
		433	my ($sk, $ob, $part, $dir, $msg) = @_;
		434	...
		435	},
		436	);
		437
		438	=item cf::CLASS::attachment $name, ...
		439
		440	Register an attachment by C<$name> through which attachable objects of the
		441	given CLASS can refer to this attachment.
		442
		443	Some classes such as crossfire maps and objects can specify attachments
		444	that are attached at load/instantiate time, thus the need for a name.
		445
		446	These calls expect any number of the following handler/hook descriptions:
134		447
135	=over 4	448	=over 4
136		449
137	=item prio => $number	450	=item prio => $number
138		451
…		…
140	by another C<prio> setting). Lower priority handlers get executed	453	by another C<prio> setting). Lower priority handlers get executed
141	earlier. The default priority is C<0>, and many built-in handlers are	454	earlier. The default priority is C<0>, and many built-in handlers are
142	registered at priority C<-1000>, so lower priorities should not be used	455	registered at priority C<-1000>, so lower priorities should not be used
143	unless you know what you are doing.	456	unless you know what you are doing.
144		457
		458	=item type => $type
		459
		460	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		461	given type of objects only (the additional parameter C<subtype> can be
		462	used to further limit to the given subtype).
		463
145	=item on_I<event> => \&cb	464	=item on_I<event> => \&cb
146		465
147	Call the given code reference whenever the named event happens (event is	466	Call the given code reference whenever the named event happens (event is
148	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which	467	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
149	handlers are recognised generally depends on the type of object these	468	handlers are recognised generally depends on the type of object these
…		…
158	package and register them. Only handlers for eevents supported by the	477	package and register them. Only handlers for eevents supported by the
159	object/class are recognised.	478	object/class are recognised.
160		479
161	=back	480	=back
162		481
163	=item cf::attach_to_type $object_type, $subtype, ...	482	Example, define an attachment called "sockpuppet" that calls the given
		483	event handler when a monster attacks:
164		484
165	Attach handlers for a specific object type (e.g. TRANSPORT) and	485	cf::object::attachment sockpuppet =>
166	subtype. If C<$subtype> is zero or undef, matches all objects of the given	486	on_skill_attack => sub {
167	type.	487	my ($self, $victim) = @_;
		488	...
		489	}
		490	}
168		491
169	=item cf::attach_to_objects ...	492	=item $attachable->valid
170		493
171	Attach handlers to all objects. Do not use this except for debugging or	494	Just because you have a perl object does not mean that the corresponding
172	very rare events, as handlers are (obviously) called for I<all> objects in	495	C-level object still exists. If you try to access an object that has no
173	the game.	496	valid C counterpart anymore you get an exception at runtime. This method
174		497	can be used to test for existence of the C object part without causing an
175	=item cf::attach_to_players ...	498	exception.
176
177	Attach handlers to all players.
178
179	=item cf::attach_to_maps ...
180
181	Attach handlers to all maps.
182
183	=item cf:register_attachment $name, ...
184
185	Register an attachment by name through which objects can refer to this
186	attachment.
187
188	=item cf:register_map_attachment $name, ...
189
190	Register an attachment by name through which maps can refer to this
191	attachment.
192		499
193	=cut	500	=cut
194		501
195	# the following variables are defined in .xs and must not be re-created	502	# the following variables are defined in .xs and must not be re-created
196	our @CB_GLOBAL = (); # registry for all global events	503	our @CB_GLOBAL = (); # registry for all global events
		504	our @CB_ATTACHABLE = (); # registry for all attachables
197	our @CB_OBJECT = (); # all objects (should not be used except in emergency)	505	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
198	our @CB_PLAYER = ();	506	our @CB_PLAYER = ();
		507	our @CB_CLIENT = ();
199	our @CB_TYPE = (); # registry for type (cf-object class) based events	508	our @CB_TYPE = (); # registry for type (cf-object class) based events
200	our @CB_MAP = ();	509	our @CB_MAP = ();
201		510
202	my %attachment;	511	my %attachment;
203		512
204	sub _attach_cb($\%$$$) {	513	sub _attach_cb($$$$) {
205	my ($registry, $undo, $event, $prio, $cb) = @_;	514	my ($registry, $event, $prio, $cb) = @_;
206		515
207	use sort 'stable';	516	use sort 'stable';
208		517
209	$cb = [$prio, $cb];	518	$cb = [$prio, $cb];
210		519
211	@{$registry->[$event]} = sort	520	@{$registry->[$event]} = sort
212	{ $a->[0] cmp $b->[0] }	521	{ $a->[0] cmp $b->[0] }
213	@{$registry->[$event] || []}, $cb;	522	@{$registry->[$event] || []}, $cb;
214
215	push @{$undo->{cb}}, [$event, $cb];
216	}	523	}
		524
		525	# hack
		526	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
217		527
218	# attach handles attaching event callbacks	528	# attach handles attaching event callbacks
219	# the only thing the caller has to do is pass the correct	529	# the only thing the caller has to do is pass the correct
220	# registry (== where the callback attaches to).	530	# registry (== where the callback attaches to).
221	sub _attach(\@$@) {	531	sub _attach {
222	my ($registry, $klass, @arg) = @_;	532	my ($registry, $klass, @arg) = @_;
223		533
		534	my $object_type;
224	my $prio = 0;	535	my $prio = 0;
225
226	my %undo = (
227	registry => $registry,
228	cb => [],
229	);
230
231	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;	536	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		537
		538	#TODO: get rid of this hack
		539	if ($attachable_klass{$klass}) {
		540	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		541	}
232		542
233	while (@arg) {	543	while (@arg) {
234	my $type = shift @arg;	544	my $type = shift @arg;
235		545
236	if ($type eq "prio") {	546	if ($type eq "prio") {
237	$prio = shift @arg;	547	$prio = shift @arg;
238		548
		549	} elsif ($type eq "type") {
		550	$object_type = shift @arg;
		551	$registry = $CB_TYPE[$object_type] ||= [];
		552
		553	} elsif ($type eq "subtype") {
		554	defined $object_type or Carp::croak "subtype specified without type";
		555	my $object_subtype = shift @arg;
		556	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		557
239	} elsif ($type eq "package") {	558	} elsif ($type eq "package") {
240	my $pkg = shift @arg;	559	my $pkg = shift @arg;
241		560
242	while (my ($name, $id) = each %cb_id) {	561	while (my ($name, $id) = each %cb_id) {
243	if (my $cb = $pkg->can ($name)) {	562	if (my $cb = $pkg->can ($name)) {
244	_attach_cb $registry, %undo, $id, $prio, $cb;	563	_attach_cb $registry, $id, $prio, $cb;
245	}	564	}
246	}	565	}
247		566
248	} elsif (exists $cb_id{$type}) {	567	} elsif (exists $cb_id{$type}) {
249	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;	568	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
250		569
251	} elsif (ref $type) {	570	} elsif (ref $type) {
252	warn "attaching objects not supported, ignoring.\n";	571	warn "attaching objects not supported, ignoring.\n";
253		572
254	} else {	573	} else {
255	shift @arg;	574	shift @arg;
256	warn "attach argument '$type' not supported, ignoring.\n";	575	warn "attach argument '$type' not supported, ignoring.\n";
257	}	576	}
258	}	577	}
259
260	\%undo
261	}	578	}
262		579
263	sub _attach_attachment {	580	sub _object_attach {
264	my ($obj, $name, %arg) = @_;	581	my ($obj, $name, %arg) = @_;
265		582
266	my $res;	583	return if exists $obj->{_attachment}{$name};
267		584
268	if (my $attach = $attachment{$name}) {	585	if (my $attach = $attachment{$name}) {
269	my $registry = $obj->registry;	586	my $registry = $obj->registry;
270		587
271	for (@$attach) {	588	for (@$attach) {
272	my ($klass, @attach) = @$_;	589	my ($klass, @attach) = @$_;
273	$res = _attach @$registry, $klass, @attach;	590	_attach $registry, $klass, @attach;
274	}	591	}
275		592
276	$obj->{$name} = \%arg;	593	$obj->{$name} = \%arg;
277	} else {	594	} else {
278	warn "object uses attachment '$name' that is not available, postponing.\n";	595	warn "object uses attachment '$name' that is not available, postponing.\n";
279	}	596	}
280		597
281	$obj->{_attachment}{$name} = undef;	598	$obj->{_attachment}{$name} = undef;
282
283	$res->{attachment} = $name;
284	$res
285	}	599	}
286		600
287	sub cf::object::attach {	601	sub cf::attachable::attach {
288	my ($obj, $name, %arg) = @_;	602	if (ref $_[0]) {
		603	_object_attach @_;
		604	} else {
		605	_attach shift->_attach_registry, @_;
		606	}
		607	};
289		608
290	_attach_attachment $obj, $name, %arg;	609	# all those should be optimised
291	}
292
293	sub cf::player::attach {
294	my ($obj, $name, %arg) = @_;
295
296	_attach_attachment $obj, $name, %arg;
297	}
298
299	sub cf::map::attach {
300	my ($obj, $name, %arg) = @_;
301
302	_attach_attachment $obj, $name, %arg;
303	}
304
305	sub cf::object::detach {	610	sub cf::attachable::detach {
306	my ($obj, $name) = @_;	611	my ($obj, $name) = @_;
307	die;#d#	612
308	}	613	if (ref $obj) {
309	sub cf::player::detach {	614	delete $obj->{_attachment}{$name};
		615	reattach ($obj);
		616	} else {
		617	Carp::croak "cannot, currently, detach class attachments";
		618	}
		619	};
		620
		621	sub cf::attachable::attached {
310	my ($obj, $name) = @_;	622	my ($obj, $name) = @_;
311	die;#d#
312	}
313	sub cf::map::detach {
314	my ($obj, $name) = @_;
315	die;#d#
316	}
317		623
318	sub attach_global {	624	exists $obj->{_attachment}{$name}
319	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
320	}	625	}
321		626
322	sub attach_to_type {	627	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
323	my $type = shift;	628	eval "#line " . __LINE__ . " 'cf.pm'
324	my $subtype = shift;	629	sub cf::\L$klass\E::_attach_registry {
		630	(\\\@CB_$klass, KLASS_$klass)
		631	}
325		632
326	_attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_	633	sub cf::\L$klass\E::attachment {
327	}
328
329	sub attach_to_objects {
330	_attach @CB_OBJECT, KLASS_OBJECT, @_
331	}
332
333	sub attach_to_players {
334	_attach @CB_PLAYER, KLASS_PLAYER, @_
335	}
336
337	sub attach_to_maps {
338	_attach @CB_MAP, KLASS_MAP, @_
339	}
340
341	sub register_attachment {
342	my $name = shift;	634	my \$name = shift;
343		635
344	$attachment{$name} = [[KLASS_OBJECT, @_]];
345	}
346
347	sub register_map_attachment {
348	my $name = shift;
349
350	$attachment{$name} = [[KLASS_MAP, @_]];	636	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		637	}
		638	";
		639	die if $@;
351	}	640	}
352		641
353	our $override;	642	our $override;
354	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?	643	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
355		644
…		…
369	for (@$callbacks) {	658	for (@$callbacks) {
370	eval { &{$_->[1]} };	659	eval { &{$_->[1]} };
371		660
372	if ($@) {	661	if ($@) {
373	warn "$@";	662	warn "$@";
374	warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";	663	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
375	override;	664	override;
376	}	665	}
377		666
378	return 1 if $override;	667	return 1 if $override;
379	}	668	}
380		669
381	0	670	0
382	}	671	}
		672
		673	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		674
		675	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		676
		677	Generate an object-specific event with the given arguments.
		678
		679	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		680	removed in future versions), and there is no public API to access override
		681	results (if you must, access C<@cf::invoke_results> directly).
		682
		683	=back
		684
		685	=cut
383		686
384	#############################################################################	687	#############################################################################
385	# object support	688	# object support
386		689
387	sub instantiate {
388	my ($obj, $data) = @_;
389
390	$data = from_json $data;
391
392	for (@$data) {
393	my ($name, $args) = @$_;
394
395	$obj->attach ($name, %{$args || {} });
396	}
397	}
398
399	# basically do the same as instantiate, without calling instantiate
400	sub reattach {	690	sub reattach {
		691	# basically do the same as instantiate, without calling instantiate
401	my ($obj) = @_;	692	my ($obj) = @_;
		693
402	my $registry = $obj->registry;	694	my $registry = $obj->registry;
403		695
404	@$registry = ();	696	@$registry = ();
405		697
406	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };	698	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
407		699
408	for my $name (keys %{ $obj->{_attachment} || {} }) {	700	for my $name (keys %{ $obj->{_attachment} || {} }) {
409	if (my $attach = $attachment{$name}) {	701	if (my $attach = $attachment{$name}) {
410	for (@$attach) {	702	for (@$attach) {
411	my ($klass, @attach) = @$_;	703	my ($klass, @attach) = @$_;
412	_attach @$registry, $klass, @attach;	704	_attach $registry, $klass, @attach;
413	}	705	}
414	} else {	706	} else {
415	warn "object uses attachment '$name' that is not available, postponing.\n";	707	warn "object uses attachment '$name' that is not available, postponing.\n";
416	}	708	}
417	}	709	}
418	}	710	}
419		711
420	sub object_freezer_save {	712	cf::attachable->attach (
421	my ($filename, $objs) = @_;
422
423	if (@$objs) {
424	open my $fh, ">:raw", "$filename.pst~";
425	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
426	close $fh;
427	chmod SAVE_MODE, "$filename.pst~";
428	rename "$filename.pst~", "$filename.pst";
429	} else {
430	unlink "$filename.pst";
431	}
432
433	chmod SAVE_MODE, "$filename~";
434	rename "$filename~", $filename;
435	}
436
437	sub object_thawer_load {
438	my ($filename) = @_;
439
440	open my $fh, "<:raw:perlio", "$filename.pst"
441	or return;
442
443	eval { local $/; (Storable::thaw <$fh>)->{objs} }
444	}
445
446	attach_to_objects
447	prio => -1000000,	713	prio => -1000000,
		714	on_instantiate => sub {
		715	my ($obj, $data) = @_;
		716
		717	$data = from_json $data;
		718
		719	for (@$data) {
		720	my ($name, $args) = @$_;
		721
		722	$obj->attach ($name, %{$args || {} });
		723	}
		724	},
		725	on_reattach => \&reattach,
448	on_clone => sub {	726	on_clone => sub {
449	my ($src, $dst) = @_;	727	my ($src, $dst) = @_;
450		728
451	@{$dst->registry} = @{$src->registry};	729	@{$dst->registry} = @{$src->registry};
452		730
453	%$dst = %$src;	731	%$dst = %$src;
454		732
455	%{$dst->{_attachment}} = %{$src->{_attachment}}	733	%{$dst->{_attachment}} = %{$src->{_attachment}}
456	if exists $src->{_attachment};	734	if exists $src->{_attachment};
457	},	735	},
458	;	736	);
		737
		738	sub object_freezer_save {
		739	my ($filename, $rdata, $objs) = @_;
		740
		741	sync_job {
		742	if (length $$rdata) {
		743	warn sprintf "saving %s (%d,%d)\n",
		744	$filename, length $$rdata, scalar @$objs;
		745
		746	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		747	chmod SAVE_MODE, $fh;
		748	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		749	aio_fsync $fh;
		750	close $fh;
		751
		752	if (@$objs) {
		753	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		754	chmod SAVE_MODE, $fh;
		755	my $data = Storable::nfreeze { version => 1, objs => $objs };
		756	aio_write $fh, 0, (length $data), $data, 0;
		757	aio_fsync $fh;
		758	close $fh;
		759	aio_rename "$filename.pst~", "$filename.pst";
		760	}
		761	} else {
		762	aio_unlink "$filename.pst";
		763	}
		764
		765	aio_rename "$filename~", $filename;
		766	} else {
		767	warn "FATAL: $filename~: $!\n";
		768	}
		769	} else {
		770	aio_unlink $filename;
		771	aio_unlink "$filename.pst";
		772	}
		773	}
		774	}
		775
		776	sub object_freezer_as_string {
		777	my ($rdata, $objs) = @_;
		778
		779	use Data::Dumper;
		780
		781	$$rdata . Dumper $objs
		782	}
		783
		784	sub object_thawer_load {
		785	my ($filename) = @_;
		786
		787	my ($data, $av);
		788
		789	(aio_load $filename, $data) >= 0
		790	or return;
		791
		792	unless (aio_stat "$filename.pst") {
		793	(aio_load "$filename.pst", $av) >= 0
		794	or return;
		795	$av = eval { (Storable::thaw <$av>)->{objs} };
		796	}
		797
		798	return ($data, $av);
		799	}
459		800
460	#############################################################################	801	#############################################################################
461	# old plug-in events	802	# command handling &c
462		803
463	sub inject_event {	804	=item cf::register_command $name => \&callback($ob,$args);
464	my $extension = shift;
465	my $event_code = shift;
466		805
467	my $cb = $hook[$event_code]{$extension}	806	Register a callback for execution when the client sends the user command
468	or return;	807	$name.
469		808
470	&$cb	809	=cut
471	}
472
473	sub inject_global_event {
474	my $event = shift;
475
476	my $cb = $hook[$event]
477	or return;
478
479	List::Util::max map &$_, values %$cb
480	}
481
482	sub inject_command {
483	my ($name, $obj, $params) = @_;
484
485	for my $cmd (@{ $command{$name} }) {
486	$cmd->[1]->($obj, $params);
487	}
488
489	-1
490	}
491		810
492	sub register_command {	811	sub register_command {
493	my ($name, $time, $cb) = @_;	812	my ($name, $cb) = @_;
494		813
495	my $caller = caller;	814	my $caller = caller;
496	#warn "registering command '$name/$time' to '$caller'";	815	#warn "registering command '$name/$time' to '$caller'";
497		816
498	push @{ $command{$name} }, [$time, $cb, $caller];	817	push @{ $COMMAND{$name} }, [$caller, $cb];
499	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
500	}	818	}
		819
		820	=item cf::register_extcmd $name => \&callback($pl,$packet);
		821
		822	Register a callbackf ro execution when the client sends an extcmd packet.
		823
		824	If the callback returns something, it is sent back as if reply was being
		825	called.
		826
		827	=cut
501		828
502	sub register_extcmd {	829	sub register_extcmd {
503	my ($name, $cb) = @_;	830	my ($name, $cb) = @_;
504		831
505	my $caller = caller;	832	my $caller = caller;
506	#warn "registering extcmd '$name' to '$caller'";	833	#warn "registering extcmd '$name' to '$caller'";
507		834
508	$extcmd{$name} = [$cb, $caller];	835	$EXTCMD{$name} = [$cb, $caller];
509	}	836	}
		837
		838	cf::player->attach (
		839	on_command => sub {
		840	my ($pl, $name, $params) = @_;
		841
		842	my $cb = $COMMAND{$name}
		843	or return;
		844
		845	for my $cmd (@$cb) {
		846	$cmd->[1]->($pl->ob, $params);
		847	}
		848
		849	cf::override;
		850	},
		851	on_extcmd => sub {
		852	my ($pl, $buf) = @_;
		853
		854	my $msg = eval { from_json $buf };
		855
		856	if (ref $msg) {
		857	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		858	if (my %reply = $cb->[0]->($pl, $msg)) {
		859	$pl->ext_reply ($msg->{msgid}, %reply);
		860	}
		861	}
		862	} else {
		863	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		864	}
		865
		866	cf::override;
		867	},
		868	);
510		869
511	sub register {	870	sub register {
512	my ($base, $pkg) = @_;	871	my ($base, $pkg) = @_;
513		872
514	#TODO	873	#TODO
…		…
533	. "#line 1 \"$path\"\n{\n"	892	. "#line 1 \"$path\"\n{\n"
534	. (do { local $/; <$fh> })	893	. (do { local $/; <$fh> })
535	. "\n};\n1";	894	. "\n};\n1";
536		895
537	eval $source	896	eval $source
538	or die "$path: $@";	897	or die $@ ? "$path: $@\n"
		898	: "extension disabled.\n";
539		899
540	push @exts, $pkg;	900	push @exts, $pkg;
541	$ext_pkg{$base} = $pkg;	901	$ext_pkg{$base} = $pkg;
542		902
543	# no strict 'refs';	903	# no strict 'refs';
…		…
556	# for my $idx (0 .. $#PLUGIN_EVENT) {	916	# for my $idx (0 .. $#PLUGIN_EVENT) {
557	# delete $hook[$idx]{$pkg};	917	# delete $hook[$idx]{$pkg};
558	# }	918	# }
559		919
560	# remove commands	920	# remove commands
561	for my $name (keys %command) {	921	for my $name (keys %COMMAND) {
562	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	922	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
563		923
564	if (@cb) {	924	if (@cb) {
565	$command{$name} = \@cb;	925	$COMMAND{$name} = \@cb;
566	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
567	} else {	926	} else {
568	delete $command{$name};
569	delete $COMMAND{"$name\000"};	927	delete $COMMAND{$name};
570	}	928	}
571	}	929	}
572		930
573	# remove extcmds	931	# remove extcmds
574	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	932	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
575	delete $extcmd{$name};	933	delete $EXTCMD{$name};
576	}	934	}
577		935
578	if (my $cb = $pkg->can ("unload")) {	936	if (my $cb = $pkg->can ("unload")) {
579	eval {	937	eval {
580	$cb->($pkg);	938	$cb->($pkg);
…		…
584		942
585	Symbol::delete_package $pkg;	943	Symbol::delete_package $pkg;
586	}	944	}
587		945
588	sub load_extensions {	946	sub load_extensions {
589	my $LIBDIR = maps_directory "perl";
590
591	for my $ext (<$LIBDIR/*.ext>) {	947	for my $ext (<$LIBDIR/*.ext>) {
592	next unless -r $ext;	948	next unless -r $ext;
593	eval {	949	eval {
594	load_extension $ext;	950	load_extension $ext;
595	1	951	1
596	} or warn "$ext not loaded: $@";	952	} or warn "$ext not loaded: $@";
597	}	953	}
598	}	954	}
599		955
600	sub _perl_reload(&) {
601	my ($msg) = @_;
602
603	$msg->("reloading...");
604
605	eval {
606	# 1. cancel all watchers
607	$_->cancel for Event::all_watchers;
608
609	# 2. unload all extensions
610	for (@exts) {
611	$msg->("unloading <$_>");
612	unload_extension $_;
613	}
614
615	# 3. unload all modules loaded from $LIBDIR
616	while (my ($k, $v) = each %INC) {
617	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
618
619	$msg->("removing <$k>");
620	delete $INC{$k};
621
622	$k =~ s/\.pm$//;
623	$k =~ s/\//::/g;
624
625	if (my $cb = $k->can ("unload_module")) {
626	$cb->();
627	}
628
629	Symbol::delete_package $k;
630	}
631
632	# 4. get rid of safe::, as good as possible
633	Symbol::delete_package "safe::$_"
634	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
635
636	# 5. remove register_script_function callbacks
637	# TODO
638
639	# 6. unload cf.pm "a bit"
640	delete $INC{"cf.pm"};
641
642	# don't, removes xs symbols, too,
643	# and global variables created in xs
644	#Symbol::delete_package __PACKAGE__;
645
646	# 7. reload cf.pm
647	$msg->("reloading cf.pm");
648	require cf;
649	};
650	$msg->($@) if $@;
651
652	$msg->("reloaded");
653	};
654
655	sub perl_reload() {
656	_perl_reload {
657	warn $_[0];
658	print "$_[0]\n";
659	};
660	}
661
662	register_command "perl-reload", 0, sub {
663	my ($who, $arg) = @_;
664
665	if ($who->flag (FLAG_WIZ)) {
666	_perl_reload {
667	warn $_[0];
668	$who->message ($_[0]);
669	};
670	}
671	};
672
673	#############################################################################
674	# extcmd framework, basically convert ext <msg>
675	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
676
677	attach_to_players
678	on_extcmd => sub {
679	my ($pl, $buf) = @_;
680
681	my $msg = eval { from_json $buf };
682
683	if (ref $msg) {
684	if (my $cb = $extcmd{$msg->{msgtype}}) {
685	if (my %reply = $cb->[0]->($pl, $msg)) {
686	$pl->ext_reply ($msg->{msgid}, %reply);
687	}
688	}
689	} else {
690	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
691	}
692
693	cf::override;
694	},
695	;
696
697	#############################################################################	956	#############################################################################
698	# load/save/clean perl data associated with a map	957	# load/save/clean perl data associated with a map
699		958
700	*cf::mapsupport::on_clean = sub {	959	*cf::mapsupport::on_clean = sub {
701	my ($map) = @_;	960	my ($map) = @_;
…		…
704	defined $path or return;	963	defined $path or return;
705		964
706	unlink "$path.pst";	965	unlink "$path.pst";
707	};	966	};
708		967
709	# old style persistent data, TODO: remove #d#
710	*cf::mapsupport::on_swapin =
711	*cf::mapsupport::on_load = sub {
712	my ($map) = @_;
713
714	my $path = $map->tmpname;
715	$path = $map->path unless defined $path;
716
717	open my $fh, "<:raw", "$path.cfperl"
718	or return; # no perl data
719
720	my $data = Storable::thaw do { local $/; <$fh> };
721
722	$data->{version} <= 1
723	or return; # too new
724
725	$map->_set_obs ($data->{obs});
726	$map->invoke (EVENT_MAP_UPGRADE);
727	};
728
729	attach_to_maps prio => -10000, package => cf::mapsupport::;	968	cf::map->attach (prio => -10000, package => cf::mapsupport::);
730		969
731	#############################################################################	970	#############################################################################
732	# load/save perl data associated with player->ob objects	971	# load/save perl data associated with player->ob objects
733		972
734	sub all_objects(@) {	973	sub all_objects(@) {
735	@_, map all_objects ($_->inv), @_	974	@_, map all_objects ($_->inv), @_
736	}	975	}
737		976
738	attach_to_players	977	# TODO: compatibility cruft, remove when no longer needed
		978	cf::player->attach (
739	on_load => sub {	979	on_load => sub {
740	my ($pl, $path) = @_;	980	my ($pl, $path) = @_;
741		981
742	for my $o (all_objects $pl->ob) {	982	for my $o (all_objects $pl->ob) {
743	if (my $value = $o->get_ob_key_value ("_perl_data")) {	983	if (my $value = $o->get_ob_key_value ("_perl_data")) {
…		…
745		985
746	%$o = %{ Storable::thaw pack "H*", $value };	986	%$o = %{ Storable::thaw pack "H*", $value };
747	}	987	}
748	}	988	}
749	},	989	},
750	;	990	);
751		991
752	#############################################################################	992	#############################################################################
753	# core extensions - in perl	993
		994	=head2 CORE EXTENSIONS
		995
		996	Functions and methods that extend core crossfire objects.
		997
		998	=head3 cf::player
		999
		1000	=over 4
754		1001
755	=item cf::player::exists $login	1002	=item cf::player::exists $login
756		1003
757	Returns true when the given account exists.	1004	Returns true when the given account exists.
758		1005
…		…
761	sub cf::player::exists($) {	1008	sub cf::player::exists($) {
762	cf::player::find $_[0]	1009	cf::player::find $_[0]
763	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	1010	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
764	}	1011	}
765		1012
		1013	=item $player->ext_reply ($msgid, $msgtype, %msg)
		1014
		1015	Sends an ext reply to the player.
		1016
		1017	=cut
		1018
		1019	sub cf::player::ext_reply($$$%) {
		1020	my ($self, $id, %msg) = @_;
		1021
		1022	$msg{msgid} = $id;
		1023
		1024	$self->send ("ext " . to_json \%msg);
		1025	}
		1026
		1027	=back
		1028
		1029	=head3 cf::object::player
		1030
		1031	=over 4
		1032
766	=item $player->reply ($npc, $msg[, $flags])	1033	=item $player_object->reply ($npc, $msg[, $flags])
767		1034
768	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	1035	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
769	can be C<undef>. Does the right thing when the player is currently in a	1036	can be C<undef>. Does the right thing when the player is currently in a
770	dialogue with the given NPC character.	1037	dialogue with the given NPC character.
771		1038
772	=cut	1039	=cut
773		1040
774	# rough implementation of a future "reply" method that works	1041	# rough implementation of a future "reply" method that works
775	# with dialog boxes.	1042	# with dialog boxes.
		1043	#TODO: the first argument must go, split into a $npc->reply_to ( method
776	sub cf::object::player::reply($$$;$) {	1044	sub cf::object::player::reply($$$;$) {
777	my ($self, $npc, $msg, $flags) = @_;	1045	my ($self, $npc, $msg, $flags) = @_;
778		1046
779	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	1047	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
780		1048
…		…
784	$msg = $npc->name . " says: $msg" if $npc;	1052	$msg = $npc->name . " says: $msg" if $npc;
785	$self->message ($msg, $flags);	1053	$self->message ($msg, $flags);
786	}	1054	}
787	}	1055	}
788		1056
789	=item $player->ext_reply ($msgid, $msgtype, %msg)	1057	=item $player_object->may ("access")
790		1058
791	Sends an ext reply to the player.	1059	Returns wether the given player is authorized to access resource "access"
		1060	(e.g. "command_wizcast").
792		1061
793	=cut	1062	=cut
794		1063
795	sub cf::player::ext_reply($$$%) {	1064	sub cf::object::player::may {
		1065	my ($self, $access) = @_;
		1066
		1067	$self->flag (cf::FLAG_WIZ) ||
		1068	(ref $cf::CFG{"may_$access"}
		1069	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		1070	: $cf::CFG{"may_$access"})
		1071	}
		1072
		1073	=head3 cf::client
		1074
		1075	=over 4
		1076
		1077	=item $client->send_drawinfo ($text, $flags)
		1078
		1079	Sends a drawinfo packet to the client. Circumvents output buffering so
		1080	should not be used under normal circumstances.
		1081
		1082	=cut
		1083
		1084	sub cf::client::send_drawinfo {
		1085	my ($self, $text, $flags) = @_;
		1086
		1087	utf8::encode $text;
		1088	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		1089	}
		1090
		1091
		1092	=item $success = $client->query ($flags, "text", \&cb)
		1093
		1094	Queues a query to the client, calling the given callback with
		1095	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		1096	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		1097
		1098	Queries can fail, so check the return code. Or don't, as queries will become
		1099	reliable at some point in the future.
		1100
		1101	=cut
		1102
		1103	sub cf::client::query {
		1104	my ($self, $flags, $text, $cb) = @_;
		1105
		1106	return unless $self->state == ST_PLAYING
		1107	|| $self->state == ST_SETUP
		1108	|| $self->state == ST_CUSTOM;
		1109
		1110	$self->state (ST_CUSTOM);
		1111
		1112	utf8::encode $text;
		1113	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		1114
		1115	$self->send_packet ($self->{query_queue}[0][0])
		1116	if @{ $self->{query_queue} } == 1;
		1117	}
		1118
		1119	cf::client->attach (
		1120	on_reply => sub {
		1121	my ($ns, $msg) = @_;
		1122
		1123	# this weird shuffling is so that direct followup queries
		1124	# get handled first
		1125	my $queue = delete $ns->{query_queue};
		1126
		1127	(shift @$queue)->[1]->($msg);
		1128
		1129	push @{ $ns->{query_queue} }, @$queue;
		1130
		1131	if (@{ $ns->{query_queue} } == @$queue) {
		1132	if (@$queue) {
		1133	$ns->send_packet ($ns->{query_queue}[0][0]);
		1134	} else {
		1135	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		1136	}
		1137	}
		1138	},
		1139	);
		1140
		1141	=item $client->coro (\&cb)
		1142
		1143	Create a new coroutine, running the specified callback. The coroutine will
		1144	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1145	or loss of connection).
		1146
		1147	=cut
		1148
		1149	sub cf::client::coro {
796	my ($self, $id, %msg) = @_;	1150	my ($self, $cb) = @_;
797		1151
798	$msg{msgid} = $id;	1152	my $coro; $coro = async {
		1153	eval {
		1154	$cb->();
		1155	};
		1156	warn $@ if $@;
		1157	};
799		1158
800	$self->send ("ext " . to_json \%msg);	1159	$coro->on_destroy (sub {
801	}	1160	delete $self->{_coro}{$coro+0};
		1161	});
802		1162
803	#############################################################################	1163	$self->{_coro}{$coro+0} = $coro;
804	# map scripting support	1164
		1165	$coro
		1166	}
		1167
		1168	cf::client->attach (
		1169	on_destroy => sub {
		1170	my ($ns) = @_;
		1171
		1172	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1173	},
		1174	);
		1175
		1176	=back
		1177
		1178
		1179	=head2 SAFE SCRIPTING
		1180
		1181	Functions that provide a safe environment to compile and execute
		1182	snippets of perl code without them endangering the safety of the server
		1183	itself. Looping constructs, I/O operators and other built-in functionality
		1184	is not available in the safe scripting environment, and the number of
		1185	functions and methods that can be called is greatly reduced.
		1186
		1187	=cut
805		1188
806	our $safe = new Safe "safe";	1189	our $safe = new Safe "safe";
807	our $safe_hole = new Safe::Hole;	1190	our $safe_hole = new Safe::Hole;
808		1191
809	$SIG{FPE} = 'IGNORE';	1192	$SIG{FPE} = 'IGNORE';
810		1193
811	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	1194	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
812		1195
813	# here we export the classes and methods available to script code	1196	# here we export the classes and methods available to script code
814		1197
		1198	=pod
		1199
		1200	The following fucntions and emthods are available within a safe environment:
		1201
		1202	cf::object contr pay_amount pay_player map
		1203	cf::object::player player
		1204	cf::player peaceful
		1205	cf::map trigger
		1206
		1207	=cut
		1208
815	for (	1209	for (
816	["cf::object" => qw(contr pay_amount pay_player)],	1210	["cf::object" => qw(contr pay_amount pay_player map)],
817	["cf::object::player" => qw(player)],	1211	["cf::object::player" => qw(player)],
818	["cf::player" => qw(peaceful)],	1212	["cf::player" => qw(peaceful)],
		1213	["cf::map" => qw(trigger)],
819	) {	1214	) {
820	no strict 'refs';	1215	no strict 'refs';
821	my ($pkg, @funs) = @$_;	1216	my ($pkg, @funs) = @$_;
822	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	1217	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
823	for @funs;	1218	for @funs;
824	}	1219	}
		1220
		1221	=over 4
		1222
		1223	=item @retval = safe_eval $code, [var => value, ...]
		1224
		1225	Compiled and executes the given perl code snippet. additional var/value
		1226	pairs result in temporary local (my) scalar variables of the given name
		1227	that are available in the code snippet. Example:
		1228
		1229	my $five = safe_eval '$first + $second', first => 1, second => 4;
		1230
		1231	=cut
825		1232
826	sub safe_eval($;@) {	1233	sub safe_eval($;@) {
827	my ($code, %vars) = @_;	1234	my ($code, %vars) = @_;
828		1235
829	my $qcode = $code;	1236	my $qcode = $code;
…		…
852	}	1259	}
853		1260
854	wantarray ? @res : $res[0]	1261	wantarray ? @res : $res[0]
855	}	1262	}
856		1263
		1264	=item cf::register_script_function $function => $cb
		1265
		1266	Register a function that can be called from within map/npc scripts. The
		1267	function should be reasonably secure and should be put into a package name
		1268	like the extension.
		1269
		1270	Example: register a function that gets called whenever a map script calls
		1271	C<rent::overview>, as used by the C<rent> extension.
		1272
		1273	cf::register_script_function "rent::overview" => sub {
		1274	...
		1275	};
		1276
		1277	=cut
		1278
857	sub register_script_function {	1279	sub register_script_function {
858	my ($fun, $cb) = @_;	1280	my ($fun, $cb) = @_;
859		1281
860	no strict 'refs';	1282	no strict 'refs';
861	*{"safe::$fun"} = $safe_hole->wrap ($cb);	1283	*{"safe::$fun"} = $safe_hole->wrap ($cb);
862	}	1284	}
863		1285
		1286	=back
		1287
		1288	=cut
		1289
		1290	#############################################################################
		1291
		1292	=head2 EXTENSION DATABASE SUPPORT
		1293
		1294	Crossfire maintains a very simple database for extension use. It can
		1295	currently store anything that can be serialised using Storable, which
		1296	excludes objects.
		1297
		1298	The parameter C<$family> should best start with the name of the extension
		1299	using it, it should be unique.
		1300
		1301	=over 4
		1302
		1303	=item $hashref = cf::db_get $family
		1304
		1305	Return a hashref for use by the extension C<$family>, which can be
		1306	modified. After modifications, you have to call C<cf::db_dirty> or
		1307	C<cf::db_sync>.
		1308
		1309	=item $value = cf::db_get $family => $key
		1310
		1311	Returns a single value from the database
		1312
		1313	=item cf::db_put $family => $hashref
		1314
		1315	Stores the given family hashref into the database. Updates are delayed, if
		1316	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		1317
		1318	=item cf::db_put $family => $key => $value
		1319
		1320	Stores the given C<$value> in the family hash. Updates are delayed, if you
		1321	want the data to be synced to disk immediately, use C<cf::db_sync>.
		1322
		1323	=item cf::db_dirty
		1324
		1325	Marks the database as dirty, to be updated at a later time.
		1326
		1327	=item cf::db_sync
		1328
		1329	Immediately write the database to disk I<if it is dirty>.
		1330
		1331	=cut
		1332
		1333	our $DB;
		1334
		1335	{
		1336	my $path = cf::localdir . "/database.pst";
		1337
		1338	sub db_load() {
		1339	warn "loading database $path\n";#d# remove later
		1340	$DB = stat $path ? Storable::retrieve $path : { };
		1341	}
		1342
		1343	my $pid;
		1344
		1345	sub db_save() {
		1346	warn "saving database $path\n";#d# remove later
		1347	waitpid $pid, 0 if $pid;
		1348	if (0 == ($pid = fork)) {
		1349	$DB->{_meta}{version} = 1;
		1350	Storable::nstore $DB, "$path~";
		1351	rename "$path~", $path;
		1352	cf::_exit 0 if defined $pid;
		1353	}
		1354	}
		1355
		1356	my $dirty;
		1357
		1358	sub db_sync() {
		1359	db_save if $dirty;
		1360	undef $dirty;
		1361	}
		1362
		1363	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		1364	db_sync;
		1365	});
		1366
		1367	sub db_dirty() {
		1368	$dirty = 1;
		1369	$idle->start;
		1370	}
		1371
		1372	sub db_get($;$) {
		1373	@_ >= 2
		1374	? $DB->{$_[0]}{$_[1]}
		1375	: ($DB->{$_[0]} ||= { })
		1376	}
		1377
		1378	sub db_put($$;$) {
		1379	if (@_ >= 3) {
		1380	$DB->{$_[0]}{$_[1]} = $_[2];
		1381	} else {
		1382	$DB->{$_[0]} = $_[1];
		1383	}
		1384	db_dirty;
		1385	}
		1386
		1387	cf::global->attach (
		1388	prio => 10000,
		1389	on_cleanup => sub {
		1390	db_sync;
		1391	},
		1392	);
		1393	}
		1394
864	#############################################################################	1395	#############################################################################
865	# the server's main()	1396	# the server's main()
866		1397
		1398	sub cfg_load {
		1399	open my $fh, "<:utf8", cf::confdir . "/config"
		1400	or return;
		1401
		1402	local $/;
		1403	*CFG = YAML::Syck::Load <$fh>;
		1404	}
		1405
867	sub main {	1406	sub main {
		1407	# we must not ever block the main coroutine
		1408	local $Coro::idle = sub {
		1409	Carp::cluck "FATAL: Coro::idle was called, major BUG\n";#d#
		1410	(Coro::unblock_sub {
		1411	Event::one_event;
		1412	})->();
		1413	};
		1414
		1415	cfg_load;
		1416	db_load;
		1417	load_extensions;
868	Event::loop;	1418	Event::loop;
869	}	1419	}
870		1420
871	#############################################################################	1421	#############################################################################
872	# initialisation	1422	# initialisation
873		1423
		1424	sub perl_reload() {
		1425	# can/must only be called in main
		1426	if ($Coro::current != $Coro::main) {
		1427	warn "can only reload from main coroutine\n";
		1428	return;
		1429	}
		1430
		1431	warn "reloading...";
		1432
		1433	local $FREEZE = 1;
		1434	cf::emergency_save;
		1435
		1436	eval {
		1437	# if anything goes wrong in here, we should simply crash as we already saved
		1438
		1439	# cancel all watchers
		1440	for (Event::all_watchers) {
		1441	$_->cancel if $_->data & WF_AUTOCANCEL;
		1442	}
		1443
		1444	# cancel all extension coros
		1445	$_->cancel for values %EXT_CORO;
		1446	%EXT_CORO = ();
		1447
		1448	# unload all extensions
		1449	for (@exts) {
		1450	warn "unloading <$_>";
		1451	unload_extension $_;
		1452	}
		1453
		1454	# unload all modules loaded from $LIBDIR
		1455	while (my ($k, $v) = each %INC) {
		1456	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		1457
		1458	warn "removing <$k>";
		1459	delete $INC{$k};
		1460
		1461	$k =~ s/\.pm$//;
		1462	$k =~ s/\//::/g;
		1463
		1464	if (my $cb = $k->can ("unload_module")) {
		1465	$cb->();
		1466	}
		1467
		1468	Symbol::delete_package $k;
		1469	}
		1470
		1471	# sync database to disk
		1472	cf::db_sync;
		1473	IO::AIO::flush;
		1474
		1475	# get rid of safe::, as good as possible
		1476	Symbol::delete_package "safe::$_"
		1477	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		1478
		1479	# remove register_script_function callbacks
		1480	# TODO
		1481
		1482	# unload cf.pm "a bit"
		1483	delete $INC{"cf.pm"};
		1484
		1485	# don't, removes xs symbols, too,
		1486	# and global variables created in xs
		1487	#Symbol::delete_package __PACKAGE__;
		1488
		1489	# reload cf.pm
		1490	warn "reloading cf.pm";
		1491	require cf;
		1492	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		1493
		1494	# load config and database again
		1495	cf::cfg_load;
		1496	cf::db_load;
		1497
		1498	# load extensions
		1499	warn "load extensions";
		1500	cf::load_extensions;
		1501
		1502	# reattach attachments to objects
		1503	warn "reattach";
		1504	_global_reattach;
		1505	};
		1506
		1507	if ($@) {
		1508	warn $@;
		1509	warn "error while reloading, exiting.";
		1510	exit 1;
		1511	}
		1512
		1513	warn "reloaded successfully";
		1514	};
		1515
		1516	#############################################################################
		1517
		1518	unless ($LINK_MAP) {
		1519	$LINK_MAP = cf::map::new;
		1520
		1521	$LINK_MAP->width (41);
		1522	$LINK_MAP->height (41);
		1523	$LINK_MAP->alloc;
		1524	$LINK_MAP->path ("{link}");
		1525	$LINK_MAP->{path} = bless { path => "{link}" }, "cf::path";
		1526	$LINK_MAP->in_memory (MAP_IN_MEMORY);
		1527	}
		1528
874	register "<global>", __PACKAGE__;	1529	register "<global>", __PACKAGE__;
875		1530
		1531	register_command "perl-reload" => sub {
		1532	my ($who, $arg) = @_;
		1533
		1534	if ($who->flag (FLAG_WIZ)) {
		1535	$who->message ("start of reload.");
		1536	perl_reload;
		1537	$who->message ("end of reload.");
		1538	}
		1539	};
		1540
876	unshift @INC, $LIBDIR;	1541	unshift @INC, $LIBDIR;
877		1542
878	load_extensions;
879
880	$TICK_WATCHER = Event->timer (	1543	$TICK_WATCHER = Event->timer (
		1544	reentrant => 0,
881	prio => 1,	1545	prio => 0,
882	at => $NEXT_TICK || 1,	1546	at => $NEXT_TICK || $TICK,
		1547	data => WF_AUTOCANCEL,
883	cb => sub {	1548	cb => sub {
		1549	unless ($FREEZE) {
884	cf::server_tick; # one server iteration	1550	cf::server_tick; # one server iteration
		1551	$RUNTIME += $TICK;
		1552	}
885		1553
886	my $NOW = Event::time;
887	$NEXT_TICK += $TICK;	1554	$NEXT_TICK += $TICK;
888		1555
889	# if we are delayed by four ticks, skip them all	1556	# if we are delayed by four ticks or more, skip them all
890	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	1557	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
891		1558
892	$TICK_WATCHER->at ($NEXT_TICK);	1559	$TICK_WATCHER->at ($NEXT_TICK);
893	$TICK_WATCHER->start;	1560	$TICK_WATCHER->start;
894	},	1561	},
895	);	1562	);
896		1563
897	_reload_2;	1564	IO::AIO::max_poll_time $TICK * 0.2;
		1565
		1566	Event->io (
		1567	fd => IO::AIO::poll_fileno,
		1568	poll => 'r',
		1569	prio => 5,
		1570	data => WF_AUTOCANCEL,
		1571	cb => \&IO::AIO::poll_cb,
		1572	);
		1573
		1574	Event->timer (
		1575	data => WF_AUTOCANCEL,
		1576	after => 0,
		1577	interval => 10,
		1578	cb => sub {
		1579	(Coro::unblock_sub {
		1580	write_runtime
		1581	or warn "ERROR: unable to write runtime file: $!";
		1582	})->();
		1583	},
		1584	);
898		1585
899	1	1586	1
900		1587

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