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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.63 by root, Fri Sep 8 17:41:41 2006 UTC vs.
Revision 1.123 by root, Tue Jan 2 19:18:33 2007 UTC

1	package cf;	1	package cf;
		2
		3	use utf8;
		4	use strict;
2		5
3	use Symbol;	6	use Symbol;
4	use List::Util;	7	use List::Util;
5	use Storable;	8	use Storable;
6	use Opcode;	9	use Opcode;
7	use Safe;	10	use Safe;
8	use Safe::Hole;	11	use Safe::Hole;
9		12
		13	use Coro 3.3;
		14	use Coro::Event;
		15	use Coro::Timer;
		16	use Coro::Signal;
		17	use Coro::Semaphore;
		18	use Coro::AIO;
		19
		20	use 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	_init_vars;	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 $LIBDIR = maps_directory "perl";	40	our $LIBDIR = datadir . "/ext";
21		41
22	our $TICK = MAX_TIME * 1e-6;	42	our $TICK = MAX_TIME * 1e-6;
23	our $TICK_WATCHER;	43	our $TICK_WATCHER;
24	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	our $EMERGENCY_POSITION = $cf::CFG{emergency_position} || ["/world/world_105_115", 5, 37];
		78
		79	#############################################################################
		80
		81	=head2 GLOBAL VARIABLES
		82
		83	=over 4
		84
		85	=item $cf::UPTIME
		86
		87	The timestamp of the server start (so not actually an uptime).
		88
		89	=item $cf::RUNTIME
		90
		91	The time this server has run, starts at 0 and is increased by $cf::TICK on
		92	every server tick.
		93
		94	=item $cf::LIBDIR
		95
		96	The perl library directory, where extensions and cf-specific modules can
		97	be found. It will be added to C<@INC> automatically.
		98
		99	=item $cf::NOW
		100
		101	The time of the last (current) server tick.
		102
		103	=item $cf::TICK
		104
		105	The interval between server ticks, in seconds.
		106
		107	=item %cf::CFG
		108
		109	Configuration for the server, loaded from C</etc/crossfire/config>, or
		110	from wherever your confdir points to.
		111
		112	=back
		113
		114	=cut
25		115
26	BEGIN {	116	BEGIN {
27	*CORE::GLOBAL::warn = sub {	117	*CORE::GLOBAL::warn = sub {
28	my $msg = join "", @_;	118	my $msg = join "", @_;
		119	utf8::encode $msg;
		120
29	$msg .= "\n"	121	$msg .= "\n"
30	unless $msg =~ /\n$/;	122	unless $msg =~ /\n$/;
31		123
32	print STDERR "cfperl: $msg";
33	LOG llevError, "cfperl: $msg";	124	LOG llevError, "cfperl: $msg";
34	};	125	};
35	}	126	}
36		127
		128	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
		129	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
		130	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		131	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		132	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
37	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';	133	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
38		134
39	# we bless all objects into (empty) derived classes to force a method lookup	135	# we bless all objects into (empty) derived classes to force a method lookup
40	# within the Safe compartment.	136	# within the Safe compartment.
41	for my $pkg (qw(cf::object cf::object::player cf::player cf::map cf::party cf::region cf::arch cf::living)) {	137	for my $pkg (qw(
		138	cf::global cf::attachable
		139	cf::object cf::object::player
		140	cf::client cf::player
		141	cf::arch cf::living
		142	cf::map cf::party cf::region
		143	)) {
42	no strict 'refs';	144	no strict 'refs';
43	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	145	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
44	}	146	}
45		147
46	$Event::DIED = sub {	148	$Event::DIED = sub {
…		…
48	};	150	};
49		151
50	my %ext_pkg;	152	my %ext_pkg;
51	my @exts;	153	my @exts;
52	my @hook;	154	my @hook;
53	my %command;
54	my %extcmd;
55		155
56	#############################################################################	156	=head2 UTILITY FUNCTIONS
57	# utility functions	157
		158	=over 4
		159
		160	=cut
58		161
59	use JSON::Syck (); # TODO# replace by JSON::PC once working	162	use JSON::Syck (); # TODO# replace by JSON::PC once working
		163
		164	=item $ref = cf::from_json $json
		165
		166	Converts a JSON string into the corresponding perl data structure.
		167
		168	=cut
60		169
61	sub from_json($) {	170	sub from_json($) {
62	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs	171	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
63	JSON::Syck::Load $_[0]	172	JSON::Syck::Load $_[0]
64	}	173	}
65		174
		175	=item $json = cf::to_json $ref
		176
		177	Converts a perl data structure into its JSON representation.
		178
		179	=cut
		180
66	sub to_json($) {	181	sub to_json($) {
67	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs	182	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
68	JSON::Syck::Dump $_[0]	183	JSON::Syck::Dump $_[0]
69	}	184	}
70		185
		186	=item my $guard = cf::guard { BLOCK }
		187
		188	Run the given callback when the guard object gets destroyed (useful for
		189	coroutine cancellations).
		190
		191	You can call C<< ->cancel >> on the guard object to stop the block from
		192	being executed.
		193
		194	=cut
		195
		196	sub guard(&) {
		197	bless \(my $cb = $_[0]), cf::guard::;
		198	}
		199
		200	sub cf::guard::cancel {
		201	${$_[0]} = sub { };
		202	}
		203
		204	sub cf::guard::DESTROY {
		205	${$_[0]}->();
		206	}
		207
		208	=item cf::lock_wait $string
		209
		210	Wait until the given lock is available. See cf::lock_acquire.
		211
		212	=item my $lock = cf::lock_acquire $string
		213
		214	Wait until the given lock is available and then acquires it and returns
		215	a guard object. If the guard object gets destroyed (goes out of scope,
		216	for example when the coroutine gets canceled), the lock is automatically
		217	returned.
		218
		219	Lock names should begin with a unique identifier (for example, find_map
		220	uses map_find and load_map uses map_load).
		221
		222	=cut
		223
		224	our %LOCK;
		225
		226	sub lock_wait($) {
		227	my ($key) = @_;
		228
		229	# wait for lock, if any
		230	while ($LOCK{$key}) {
		231	push @{ $LOCK{$key} }, $Coro::current;
		232	Coro::schedule;
		233	}
		234	}
		235
		236	sub lock_acquire($) {
		237	my ($key) = @_;
		238
		239	# wait, to be sure we are not locked
		240	lock_wait $key;
		241
		242	$LOCK{$key} = [];
		243
		244	cf::guard {
		245	# wake up all waiters, to be on the safe side
		246	$_->ready for @{ delete $LOCK{$key} };
		247	}
		248	}
		249
		250	=item cf::sync_job { BLOCK }
		251
		252	The design of crossfire+ requires that the main coro ($Coro::main) is
		253	always able to handle events or runnable, as crossfire+ is only partly
		254	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		255
		256	If it must be done, put the blocking parts into C<sync_job>. This will run
		257	the given BLOCK in another coroutine while waiting for the result. The
		258	server will be frozen during this time, so the block should either finish
		259	fast or be very important.
		260
		261	=cut
		262
		263	sub sync_job(&) {
		264	my ($job) = @_;
		265
		266	if ($Coro::current == $Coro::main) {
		267	# this is the main coro, too bad, we have to block
		268	# till the operation succeeds, freezing the server :/
		269
		270	# TODO: use suspend/resume instead
		271	# (but this is cancel-safe)
		272	local $FREEZE = 1;
		273
		274	my $busy = 1;
		275	my @res;
		276
		277	(Coro::async {
		278	@res = eval { $job->() };
		279	warn $@ if $@;
		280	undef $busy;
		281	})->prio (Coro::PRIO_MAX);
		282
		283	while ($busy) {
		284	Coro::cede_notself;
		285	Event::one_event unless Coro::nready;
		286	}
		287
		288	wantarray ? @res : $res[0]
		289	} else {
		290	# we are in another coroutine, how wonderful, everything just works
		291
		292	$job->()
		293	}
		294	}
		295
		296	=item $coro = cf::coro { BLOCK }
		297
		298	Creates and returns a new coro. This coro is automcatially being canceled
		299	when the extension calling this is being unloaded.
		300
		301	=cut
		302
		303	sub coro(&) {
		304	my $cb = shift;
		305
		306	my $coro; $coro = async {
		307	eval {
		308	$cb->();
		309	};
		310	warn $@ if $@;
		311	};
		312
		313	$coro->on_destroy (sub {
		314	delete $EXT_CORO{$coro+0};
		315	});
		316	$EXT_CORO{$coro+0} = $coro;
		317
		318	$coro
		319	}
		320
		321	sub write_runtime {
		322	my $runtime = cf::localdir . "/runtime";
		323
		324	my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
		325	or return;
		326
		327	my $value = $cf::RUNTIME + 1 + 10; # 10 is the runtime save interval, for a monotonic clock
		328	(aio_write $fh, 0, (length $value), $value, 0) <= 0
		329	and return;
		330
		331	aio_fsync $fh
		332	and return;
		333
		334	close $fh
		335	or return;
		336
		337	aio_rename "$runtime~", $runtime
		338	and return;
		339
		340	1
		341	}
		342
		343	=back
		344
		345	=cut
		346
71	#############################################################################	347	#############################################################################
72	# "new" plug-in system
73		348
74	=head3 EVENTS AND OBJECT ATTACHMENTS	349	package cf::path;
		350
		351	sub new {
		352	my ($class, $path, $base) = @_;
		353
		354	$path = $path->as_string if ref $path;
		355
		356	my $self = bless { }, $class;
		357
		358	# {... are special paths that are not touched
		359	# ?xxx/... are special absolute paths
		360	# ?random/... random maps
		361	# /! non-realised random map exit
		362	# /... normal maps
		363	# ~/... per-player maps without a specific player (DO NOT USE)
		364	# ~user/... per-player map of a specific user
		365
		366	if ($path =~ /^{/) {
		367	# fine as it is
		368	} elsif ($path =~ s{^\?random/}{}) {
		369	Coro::AIO::aio_load "$cf::RANDOM_MAPS/$path.meta", my $data;
		370	$self->{random} = cf::from_json $data;
		371	} else {
		372	if ($path =~ s{^~([^/]+)?}{}) {
		373	$self->{user_rel} = 1;
		374
		375	if (defined $1) {
		376	$self->{user} = $1;
		377	} elsif ($base =~ m{^~([^/]+)/}) {
		378	$self->{user} = $1;
		379	} else {
		380	warn "cannot resolve user-relative path without user <$path,$base>\n";
		381	}
		382	} elsif ($path =~ /^\//) {
		383	# already absolute
		384	} else {
		385	$base =~ s{[^/]+/?$}{};
		386	return $class->new ("$base/$path");
		387	}
		388
		389	for ($path) {
		390	redo if s{/\.?/}{/};
		391	redo if s{/[^/]+/\.\./}{/};
		392	}
		393	}
		394
		395	$self->{path} = $path;
		396
		397	$self
		398	}
		399
		400	# the name / primary key / in-game path
		401	sub as_string {
		402	my ($self) = @_;
		403
		404	$self->{user_rel} ? "~$self->{user}$self->{path}"
		405	: $self->{random} ? "?random/$self->{path}"
		406	: $self->{path}
		407	}
		408
		409	# the displayed name, this is a one way mapping
		410	sub visible_name {
		411	my ($self) = @_;
		412
		413	# if (my $rmp = $self->{random}) {
		414	# # todo: be more intelligent about this
		415	# "?random/$rmp->{origin_map}+$rmp->{origin_x}+$rmp->{origin_y}/$rmp->{dungeon_level}"
		416	# } else {
		417	$self->as_string
		418	# }
		419	}
		420
		421	# escape the /'s in the path
		422	sub _escaped_path {
		423	# ∕ is U+2215
		424	(my $path = $_[0]{path}) =~ s/\//∕/g;
		425	$path
		426	}
		427
		428	# the original (read-only) location
		429	sub load_path {
		430	my ($self) = @_;
		431
		432	sprintf "%s/%s/%s", cf::datadir, cf::mapdir, $self->{path}
		433	}
		434
		435	# the temporary/swap location
		436	sub save_path {
		437	my ($self) = @_;
		438
		439	$self->{user_rel} ? sprintf "%s/%s/%s/%s", cf::localdir, cf::playerdir, $self->{user}, $self->_escaped_path
		440	: $self->{random} ? sprintf "%s/%s", $RANDOM_MAPS, $self->{path}
		441	: sprintf "%s/%s/%s", cf::localdir, cf::tmpdir, $self->_escaped_path
		442	}
		443
		444	# the unique path, might be eq to save_path
		445	sub uniq_path {
		446	my ($self) = @_;
		447
		448	$self->{user_rel} || $self->{random}
		449	? undef
		450	: sprintf "%s/%s/%s", cf::localdir, cf::uniquedir, $self->_escaped_path
		451	}
		452
		453	# return random map parameters, or undef
		454	sub random_map_params {
		455	my ($self) = @_;
		456
		457	$self->{random}
		458	}
		459
		460	# this is somewhat ugly, but style maps do need special treatment
		461	sub is_style_map {
		462	$_[0]{path} =~ m{^/styles/}
		463	}
		464
		465	package cf;
		466
		467	#############################################################################
		468
		469	=head2 ATTACHABLE OBJECTS
		470
		471	Many objects in crossfire are so-called attachable objects. That means you can
		472	attach callbacks/event handlers (a collection of which is called an "attachment")
		473	to it. All such attachable objects support the following methods.
		474
		475	In the following description, CLASS can be any of C<global>, C<object>
		476	C<player>, C<client> or C<map> (i.e. the attachable objects in
		477	crossfire+).
75		478
76	=over 4	479	=over 4
77		480
78	=item $object->attach ($attachment, key => $value...)
79
80	=item $object->detach ($attachment)
81
82	Attach/detach a pre-registered attachment to an object.
83
84	=item $player->attach ($attachment, key => $value...)
85
86	=item $player->detach ($attachment)
87
88	Attach/detach a pre-registered attachment to a player.
89
90	=item $map->attach ($attachment, key => $value...)	481	=item $attachable->attach ($attachment, key => $value...)
91		482
92	=item $map->detach ($attachment)	483	=item $attachable->detach ($attachment)
93		484
94	Attach/detach a pre-registered attachment to a map.	485	Attach/detach a pre-registered attachment to a specific object and give it
		486	the specified key/value pairs as arguments.
95		487
96	=item $bool = $object->attached ($name)	488	Example, attach a minesweeper attachment to the given object, making it a
		489	10x10 minesweeper game:
97		490
98	=item $bool = $player->attached ($name)	491	$obj->attach (minesweeper => width => 10, height => 10);
99		492
100	=item $bool = $map->attached ($name)	493	=item $bool = $attachable->attached ($name)
101		494
102	Checks wether the named attachment is currently attached to the object.	495	Checks wether the named attachment is currently attached to the object.
103		496
104	=item cf::attach_global ...	497	=item cf::CLASS->attach ...
105		498
106	Attach handlers for global events.	499	=item cf::CLASS->detach ...
107		500
108	This and all following C<attach_*>-functions expect any number of the	501	Define an anonymous attachment and attach it to all objects of the given
109	following handler/hook descriptions:	502	CLASS. See the next function for an explanation of its arguments.
		503
		504	You can attach to global events by using the C<cf::global> class.
		505
		506	Example, log all player logins:
		507
		508	cf::player->attach (
		509	on_login => sub {
		510	my ($pl) = @_;
		511	...
		512	},
		513	);
		514
		515	Example, attach to the jeweler skill:
		516
		517	cf::object->attach (
		518	type => cf::SKILL,
		519	subtype => cf::SK_JEWELER,
		520	on_use_skill => sub {
		521	my ($sk, $ob, $part, $dir, $msg) = @_;
		522	...
		523	},
		524	);
		525
		526	=item cf::CLASS::attachment $name, ...
		527
		528	Register an attachment by C<$name> through which attachable objects of the
		529	given CLASS can refer to this attachment.
		530
		531	Some classes such as crossfire maps and objects can specify attachments
		532	that are attached at load/instantiate time, thus the need for a name.
		533
		534	These calls expect any number of the following handler/hook descriptions:
110		535
111	=over 4	536	=over 4
112		537
113	=item prio => $number	538	=item prio => $number
114		539
…		…
116	by another C<prio> setting). Lower priority handlers get executed	541	by another C<prio> setting). Lower priority handlers get executed
117	earlier. The default priority is C<0>, and many built-in handlers are	542	earlier. The default priority is C<0>, and many built-in handlers are
118	registered at priority C<-1000>, so lower priorities should not be used	543	registered at priority C<-1000>, so lower priorities should not be used
119	unless you know what you are doing.	544	unless you know what you are doing.
120		545
		546	=item type => $type
		547
		548	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		549	given type of objects only (the additional parameter C<subtype> can be
		550	used to further limit to the given subtype).
		551
121	=item on_I<event> => \&cb	552	=item on_I<event> => \&cb
122		553
123	Call the given code reference whenever the named event happens (event is	554	Call the given code reference whenever the named event happens (event is
124	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which	555	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
125	handlers are recognised generally depends on the type of object these	556	handlers are recognised generally depends on the type of object these
…		…
134	package and register them. Only handlers for eevents supported by the	565	package and register them. Only handlers for eevents supported by the
135	object/class are recognised.	566	object/class are recognised.
136		567
137	=back	568	=back
138		569
139	=item cf::attach_to_type $object_type, $subtype, ...	570	Example, define an attachment called "sockpuppet" that calls the given
		571	event handler when a monster attacks:
140		572
141	Attach handlers for a specific object type (e.g. TRANSPORT) and	573	cf::object::attachment sockpuppet =>
142	subtype. If C<$subtype> is zero or undef, matches all objects of the given	574	on_skill_attack => sub {
143	type.	575	my ($self, $victim) = @_;
144		576	...
145	=item cf::attach_to_objects ...
146
147	Attach handlers to all objects. Do not use this except for debugging or
148	very rare events, as handlers are (obviously) called for I<all> objects in
149	the game.
150
151	=item cf::attach_to_players ...
152
153	Attach handlers to all players.
154
155	=item cf::attach_to_maps ...
156
157	Attach handlers to all maps.
158
159	=item cf:register_attachment $name, ...
160
161	Register an attachment by name through which objects can refer to this
162	attachment.
163
164	=item cf:register_player_attachment $name, ...
165
166	Register an attachment by name through which players can refer to this
167	attachment.
168
169	=item cf:register_map_attachment $name, ...
170
171	Register an attachment by name through which maps can refer to this
172	attachment.
173
174	=cut
175
176	# the following variables are defined in .xs and must not be re-created
177	our @CB_GLOBAL = (); # registry for all global events
178	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
179	our @CB_PLAYER = ();
180	our @CB_TYPE = (); # registry for type (cf-object class) based events
181	our @CB_MAP = ();
182
183	my %attachment;
184
185	sub _attach_cb($\%$$$) {
186	my ($registry, $undo, $event, $prio, $cb) = @_;
187
188	use sort 'stable';
189
190	$cb = [$prio, $cb];
191
192	@{$registry->[$event]} = sort
193	{ $a->[0] cmp $b->[0] }
194	@{$registry->[$event] || []}, $cb;
195
196	push @{$undo->{cb}}, [$event, $cb];
197	}
198
199	# attach handles attaching event callbacks
200	# the only thing the caller has to do is pass the correct
201	# registry (== where the callback attaches to).
202	sub _attach(\@$@) {
203	my ($registry, $klass, @arg) = @_;
204
205	my $prio = 0;
206
207	my %undo = (
208	registry => $registry,
209	cb => [],
210	);
211
212	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
213
214	while (@arg) {
215	my $type = shift @arg;
216
217	if ($type eq "prio") {
218	$prio = shift @arg;
219
220	} elsif ($type eq "package") {
221	my $pkg = shift @arg;
222
223	while (my ($name, $id) = each %cb_id) {
224	if (my $cb = $pkg->can ($name)) {
225	_attach_cb $registry, %undo, $id, $prio, $cb;
226	}
227	}	577	}
228
229	} elsif (exists $cb_id{$type}) {
230	_attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;
231
232	} elsif (ref $type) {
233	warn "attaching objects not supported, ignoring.\n";
234
235	} else {
236	shift @arg;
237	warn "attach argument '$type' not supported, ignoring.\n";
238	}
239	}
240
241	\%undo
242	}
243
244	sub _attach_attachment {
245	my ($obj, $name, %arg) = @_;
246
247	return if exists $obj->{_attachment}{$name};
248
249	my $res;
250
251	if (my $attach = $attachment{$name}) {
252	my $registry = $obj->registry;
253
254	for (@$attach) {
255	my ($klass, @attach) = @$_;
256	$res = _attach @$registry, $klass, @attach;
257	}
258
259	$obj->{$name} = \%arg;
260	} else {
261	warn "object uses attachment '$name' that is not available, postponing.\n";
262	}
263
264	$obj->{_attachment}{$name} = undef;
265
266	$res->{attachment} = $name;
267	$res
268	}
269
270	*cf::object::attach =
271	*cf::player::attach =
272	*cf::map::attach = sub {
273	my ($obj, $name, %arg) = @_;
274
275	_attach_attachment $obj, $name, %arg;
276	};
277
278	# all those should be optimised
279	*cf::object::detach =
280	*cf::player::detach =
281	*cf::map::detach = sub {
282	my ($obj, $name) = @_;
283
284	delete $obj->{_attachment}{$name};
285	reattach ($obj);
286	};
287
288	*cf::object::attached =
289	*cf::player::attached =
290	*cf::map::attached = sub {
291	my ($obj, $name) = @_;
292
293	exists $obj->{_attachment}{$name}
294	};
295
296	sub attach_global {
297	_attach @CB_GLOBAL, KLASS_GLOBAL, @_
298	}
299
300	sub attach_to_type {
301	my $type = shift;
302	my $subtype = shift;
303
304	_attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_
305	}
306
307	sub attach_to_objects {
308	_attach @CB_OBJECT, KLASS_OBJECT, @_
309	}
310
311	sub attach_to_players {
312	_attach @CB_PLAYER, KLASS_PLAYER, @_
313	}
314
315	sub attach_to_maps {
316	_attach @CB_MAP, KLASS_MAP, @_
317	}
318
319	sub register_attachment {
320	my $name = shift;
321
322	$attachment{$name} = [[KLASS_OBJECT, @_]];
323	}
324
325	sub register_player_attachment {
326	my $name = shift;
327
328	$attachment{$name} = [[KLASS_PLAYER, @_]];
329	}
330
331	sub register_map_attachment {
332	my $name = shift;
333
334	$attachment{$name} = [[KLASS_MAP, @_]];
335	}
336
337	our $override;
338	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
339
340	sub override {
341	$override = 1;
342	@invoke_results = ();
343	}
344
345	sub do_invoke {
346	my $event = shift;
347	my $callbacks = shift;
348
349	@invoke_results = ();
350
351	local $override;
352
353	for (@$callbacks) {
354	eval { &{$_->[1]} };
355
356	if ($@) {
357	warn "$@";
358	warn "... while processing $EVENT[$event][0] event, skipping processing altogether.\n";
359	override;
360	}
361
362	return 1 if $override;
363	}
364
365	0	578	}
366	}
367		579
368	=item $bool = cf::invoke EVENT_GLOBAL_XXX, ...	580	=item $attachable->valid
369
370	=item $bool = $object->invoke (EVENT_OBJECT_XXX, ...)
371
372	=item $bool = $player->invoke (EVENT_PLAYER_XXX, ...)
373
374	=item $bool = $map->invoke (EVENT_MAP_XXX, ...)
375
376	Generate a global/object/player/map-specific event with the given arguments.
377
378	This API is preliminary (most likely, the EVENT_KLASS_xxx prefix will be
379	removed in future versions), and there is no public API to access override
380	results (if you must, access C<@cf::invoke_results> directly).
381
382	=back
383
384	=head2 methods valid for all pointers
385
386	=over 4
387
388	=item $object->valid
389
390	=item $player->valid
391
392	=item $map->valid
393		581
394	Just because you have a perl object does not mean that the corresponding	582	Just because you have a perl object does not mean that the corresponding
395	C-level object still exists. If you try to access an object that has no	583	C-level object still exists. If you try to access an object that has no
396	valid C counterpart anymore you get an exception at runtime. This method	584	valid C counterpart anymore you get an exception at runtime. This method
397	can be used to test for existence of the C object part without causing an	585	can be used to test for existence of the C object part without causing an
398	exception.	586	exception.
399		587
		588	=cut
		589
		590	# the following variables are defined in .xs and must not be re-created
		591	our @CB_GLOBAL = (); # registry for all global events
		592	our @CB_ATTACHABLE = (); # registry for all attachables
		593	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		594	our @CB_PLAYER = ();
		595	our @CB_CLIENT = ();
		596	our @CB_TYPE = (); # registry for type (cf-object class) based events
		597	our @CB_MAP = ();
		598
		599	my %attachment;
		600
		601	sub _attach_cb($$$$) {
		602	my ($registry, $event, $prio, $cb) = @_;
		603
		604	use sort 'stable';
		605
		606	$cb = [$prio, $cb];
		607
		608	@{$registry->[$event]} = sort
		609	{ $a->[0] cmp $b->[0] }
		610	@{$registry->[$event] || []}, $cb;
		611	}
		612
		613	# hack
		614	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		615
		616	# attach handles attaching event callbacks
		617	# the only thing the caller has to do is pass the correct
		618	# registry (== where the callback attaches to).
		619	sub _attach {
		620	my ($registry, $klass, @arg) = @_;
		621
		622	my $object_type;
		623	my $prio = 0;
		624	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		625
		626	#TODO: get rid of this hack
		627	if ($attachable_klass{$klass}) {
		628	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		629	}
		630
		631	while (@arg) {
		632	my $type = shift @arg;
		633
		634	if ($type eq "prio") {
		635	$prio = shift @arg;
		636
		637	} elsif ($type eq "type") {
		638	$object_type = shift @arg;
		639	$registry = $CB_TYPE[$object_type] ||= [];
		640
		641	} elsif ($type eq "subtype") {
		642	defined $object_type or Carp::croak "subtype specified without type";
		643	my $object_subtype = shift @arg;
		644	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		645
		646	} elsif ($type eq "package") {
		647	my $pkg = shift @arg;
		648
		649	while (my ($name, $id) = each %cb_id) {
		650	if (my $cb = $pkg->can ($name)) {
		651	_attach_cb $registry, $id, $prio, $cb;
		652	}
		653	}
		654
		655	} elsif (exists $cb_id{$type}) {
		656	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		657
		658	} elsif (ref $type) {
		659	warn "attaching objects not supported, ignoring.\n";
		660
		661	} else {
		662	shift @arg;
		663	warn "attach argument '$type' not supported, ignoring.\n";
		664	}
		665	}
		666	}
		667
		668	sub _object_attach {
		669	my ($obj, $name, %arg) = @_;
		670
		671	return if exists $obj->{_attachment}{$name};
		672
		673	if (my $attach = $attachment{$name}) {
		674	my $registry = $obj->registry;
		675
		676	for (@$attach) {
		677	my ($klass, @attach) = @$_;
		678	_attach $registry, $klass, @attach;
		679	}
		680
		681	$obj->{$name} = \%arg;
		682	} else {
		683	warn "object uses attachment '$name' that is not available, postponing.\n";
		684	}
		685
		686	$obj->{_attachment}{$name} = undef;
		687	}
		688
		689	sub cf::attachable::attach {
		690	if (ref $_[0]) {
		691	_object_attach @_;
		692	} else {
		693	_attach shift->_attach_registry, @_;
		694	}
		695	};
		696
		697	# all those should be optimised
		698	sub cf::attachable::detach {
		699	my ($obj, $name) = @_;
		700
		701	if (ref $obj) {
		702	delete $obj->{_attachment}{$name};
		703	reattach ($obj);
		704	} else {
		705	Carp::croak "cannot, currently, detach class attachments";
		706	}
		707	};
		708
		709	sub cf::attachable::attached {
		710	my ($obj, $name) = @_;
		711
		712	exists $obj->{_attachment}{$name}
		713	}
		714
		715	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		716	eval "#line " . __LINE__ . " 'cf.pm'
		717	sub cf::\L$klass\E::_attach_registry {
		718	(\\\@CB_$klass, KLASS_$klass)
		719	}
		720
		721	sub cf::\L$klass\E::attachment {
		722	my \$name = shift;
		723
		724	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		725	}
		726	";
		727	die if $@;
		728	}
		729
		730	our $override;
		731	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		732
		733	sub override {
		734	$override = 1;
		735	@invoke_results = ();
		736	}
		737
		738	sub do_invoke {
		739	my $event = shift;
		740	my $callbacks = shift;
		741
		742	@invoke_results = ();
		743
		744	local $override;
		745
		746	for (@$callbacks) {
		747	eval { &{$_->[1]} };
		748
		749	if ($@) {
		750	warn "$@";
		751	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		752	override;
		753	}
		754
		755	return 1 if $override;
		756	}
		757
		758	0
		759	}
		760
		761	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		762
		763	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		764
		765	Generate an object-specific event with the given arguments.
		766
		767	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		768	removed in future versions), and there is no public API to access override
		769	results (if you must, access C<@cf::invoke_results> directly).
		770
400	=back	771	=back
401		772
402	=cut	773	=cut
403
404	*cf::object::valid =
405	*cf::player::valid =
406	*cf::map::valid = \&cf::_valid;
407		774
408	#############################################################################	775	#############################################################################
409	# object support	776	# object support
410		777
411	sub instantiate {
412	my ($obj, $data) = @_;
413
414	$data = from_json $data;
415
416	for (@$data) {
417	my ($name, $args) = @$_;
418
419	$obj->attach ($name, %{$args || {} });
420	}
421	}
422
423	# basically do the same as instantiate, without calling instantiate
424	sub reattach {	778	sub reattach {
		779	# basically do the same as instantiate, without calling instantiate
425	my ($obj) = @_;	780	my ($obj) = @_;
		781
426	my $registry = $obj->registry;	782	my $registry = $obj->registry;
427		783
428	@$registry = ();	784	@$registry = ();
429		785
430	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };	786	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
431		787
432	for my $name (keys %{ $obj->{_attachment} || {} }) {	788	for my $name (keys %{ $obj->{_attachment} || {} }) {
433	if (my $attach = $attachment{$name}) {	789	if (my $attach = $attachment{$name}) {
434	for (@$attach) {	790	for (@$attach) {
435	my ($klass, @attach) = @$_;	791	my ($klass, @attach) = @$_;
436	_attach @$registry, $klass, @attach;	792	_attach $registry, $klass, @attach;
437	}	793	}
438	} else {	794	} else {
439	warn "object uses attachment '$name' that is not available, postponing.\n";	795	warn "object uses attachment '$name' that is not available, postponing.\n";
440	}	796	}
441	}	797	}
442	}	798	}
443		799
444	sub object_freezer_save {	800	cf::attachable->attach (
445	my ($filename, $rdata, $objs) = @_;
446
447	if (length $$rdata) {
448	warn sprintf "saving %s (%d,%d)\n",
449	$filename, length $$rdata, scalar @$objs;
450
451	if (open my $fh, ">:raw", "$filename~") {
452	chmod SAVE_MODE, $fh;
453	syswrite $fh, $$rdata;
454	close $fh;
455
456	if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
457	chmod SAVE_MODE, $fh;
458	syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
459	close $fh;
460	rename "$filename.pst~", "$filename.pst";
461	} else {
462	unlink "$filename.pst";
463	}
464
465	rename "$filename~", $filename;
466	} else {
467	warn "FATAL: $filename~: $!\n";
468	}
469	} else {
470	unlink $filename;
471	unlink "$filename.pst";
472	}
473	}
474
475	sub object_thawer_load {
476	my ($filename) = @_;
477
478	local $/;
479
480	my $av;
481
482	#TODO: use sysread etc.
483	if (open my $data, "<:raw:perlio", $filename) {
484	$data = <$data>;
485	if (open my $pst, "<:raw:perlio", "$filename.pst") {
486	$av = eval { (Storable::thaw <$pst>)->{objs} };
487	}
488	return ($data, $av);
489	}
490
491	()
492	}
493
494	attach_to_objects
495	prio => -1000000,	801	prio => -1000000,
		802	on_instantiate => sub {
		803	my ($obj, $data) = @_;
		804
		805	$data = from_json $data;
		806
		807	for (@$data) {
		808	my ($name, $args) = @$_;
		809
		810	$obj->attach ($name, %{$args || {} });
		811	}
		812	},
		813	on_reattach => \&reattach,
496	on_clone => sub {	814	on_clone => sub {
497	my ($src, $dst) = @_;	815	my ($src, $dst) = @_;
498		816
499	@{$dst->registry} = @{$src->registry};	817	@{$dst->registry} = @{$src->registry};
500		818
501	%$dst = %$src;	819	%$dst = %$src;
502		820
503	%{$dst->{_attachment}} = %{$src->{_attachment}}	821	%{$dst->{_attachment}} = %{$src->{_attachment}}
504	if exists $src->{_attachment};	822	if exists $src->{_attachment};
505	},	823	},
506	;	824	);
		825
		826	sub object_freezer_save {
		827	my ($filename, $rdata, $objs) = @_;
		828
		829	sync_job {
		830	if (length $$rdata) {
		831	warn sprintf "saving %s (%d,%d)\n",
		832	$filename, length $$rdata, scalar @$objs;
		833
		834	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		835	chmod SAVE_MODE, $fh;
		836	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		837	aio_fsync $fh;
		838	close $fh;
		839
		840	if (@$objs) {
		841	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		842	chmod SAVE_MODE, $fh;
		843	my $data = Storable::nfreeze { version => 1, objs => $objs };
		844	aio_write $fh, 0, (length $data), $data, 0;
		845	aio_fsync $fh;
		846	close $fh;
		847	aio_rename "$filename.pst~", "$filename.pst";
		848	}
		849	} else {
		850	aio_unlink "$filename.pst";
		851	}
		852
		853	aio_rename "$filename~", $filename;
		854	} else {
		855	warn "FATAL: $filename~: $!\n";
		856	}
		857	} else {
		858	aio_unlink $filename;
		859	aio_unlink "$filename.pst";
		860	}
		861	}
		862	}
		863
		864	sub object_freezer_as_string {
		865	my ($rdata, $objs) = @_;
		866
		867	use Data::Dumper;
		868
		869	$$rdata . Dumper $objs
		870	}
		871
		872	sub object_thawer_load {
		873	my ($filename) = @_;
		874
		875	my ($data, $av);
		876
		877	(aio_load $filename, $data) >= 0
		878	or return;
		879
		880	unless (aio_stat "$filename.pst") {
		881	(aio_load "$filename.pst", $av) >= 0
		882	or return;
		883	$av = eval { (Storable::thaw $av)->{objs} };
		884	}
		885
		886	warn sprintf "loading %s (%d)\n",
		887	$filename, length $data, scalar @{$av || []};#d#
		888	return ($data, $av);
		889	}
507		890
508	#############################################################################	891	#############################################################################
509	# old plug-in events	892	# command handling &c
510		893
511	sub inject_event {	894	=item cf::register_command $name => \&callback($ob,$args);
512	my $extension = shift;
513	my $event_code = shift;
514		895
515	my $cb = $hook[$event_code]{$extension}	896	Register a callback for execution when the client sends the user command
516	or return;	897	$name.
517		898
518	&$cb	899	=cut
519	}
520
521	sub inject_global_event {
522	my $event = shift;
523
524	my $cb = $hook[$event]
525	or return;
526
527	List::Util::max map &$_, values %$cb
528	}
529
530	sub inject_command {
531	my ($name, $obj, $params) = @_;
532
533	for my $cmd (@{ $command{$name} }) {
534	$cmd->[1]->($obj, $params);
535	}
536
537	-1
538	}
539		900
540	sub register_command {	901	sub register_command {
541	my ($name, $time, $cb) = @_;	902	my ($name, $cb) = @_;
542		903
543	my $caller = caller;	904	my $caller = caller;
544	#warn "registering command '$name/$time' to '$caller'";	905	#warn "registering command '$name/$time' to '$caller'";
545		906
546	push @{ $command{$name} }, [$time, $cb, $caller];	907	push @{ $COMMAND{$name} }, [$caller, $cb];
547	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
548	}	908	}
		909
		910	=item cf::register_extcmd $name => \&callback($pl,$packet);
		911
		912	Register a callbackf ro execution when the client sends an extcmd packet.
		913
		914	If the callback returns something, it is sent back as if reply was being
		915	called.
		916
		917	=cut
549		918
550	sub register_extcmd {	919	sub register_extcmd {
551	my ($name, $cb) = @_;	920	my ($name, $cb) = @_;
552		921
553	my $caller = caller;	922	my $caller = caller;
554	#warn "registering extcmd '$name' to '$caller'";	923	#warn "registering extcmd '$name' to '$caller'";
555		924
556	$extcmd{$name} = [$cb, $caller];	925	$EXTCMD{$name} = [$cb, $caller];
557	}	926	}
		927
		928	cf::player->attach (
		929	on_command => sub {
		930	my ($pl, $name, $params) = @_;
		931
		932	my $cb = $COMMAND{$name}
		933	or return;
		934
		935	for my $cmd (@$cb) {
		936	$cmd->[1]->($pl->ob, $params);
		937	}
		938
		939	cf::override;
		940	},
		941	on_extcmd => sub {
		942	my ($pl, $buf) = @_;
		943
		944	my $msg = eval { from_json $buf };
		945
		946	if (ref $msg) {
		947	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		948	if (my %reply = $cb->[0]->($pl, $msg)) {
		949	$pl->ext_reply ($msg->{msgid}, %reply);
		950	}
		951	}
		952	} else {
		953	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		954	}
		955
		956	cf::override;
		957	},
		958	);
558		959
559	sub register {	960	sub register {
560	my ($base, $pkg) = @_;	961	my ($base, $pkg) = @_;
561		962
562	#TODO	963	#TODO
…		…
581	. "#line 1 \"$path\"\n{\n"	982	. "#line 1 \"$path\"\n{\n"
582	. (do { local $/; <$fh> })	983	. (do { local $/; <$fh> })
583	. "\n};\n1";	984	. "\n};\n1";
584		985
585	eval $source	986	eval $source
586	or die "$path: $@";	987	or die $@ ? "$path: $@\n"
		988	: "extension disabled.\n";
587		989
588	push @exts, $pkg;	990	push @exts, $pkg;
589	$ext_pkg{$base} = $pkg;	991	$ext_pkg{$base} = $pkg;
590		992
591	# no strict 'refs';	993	# no strict 'refs';
…		…
604	# for my $idx (0 .. $#PLUGIN_EVENT) {	1006	# for my $idx (0 .. $#PLUGIN_EVENT) {
605	# delete $hook[$idx]{$pkg};	1007	# delete $hook[$idx]{$pkg};
606	# }	1008	# }
607		1009
608	# remove commands	1010	# remove commands
609	for my $name (keys %command) {	1011	for my $name (keys %COMMAND) {
610	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	1012	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
611		1013
612	if (@cb) {	1014	if (@cb) {
613	$command{$name} = \@cb;	1015	$COMMAND{$name} = \@cb;
614	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
615	} else {	1016	} else {
616	delete $command{$name};
617	delete $COMMAND{"$name\000"};	1017	delete $COMMAND{$name};
618	}	1018	}
619	}	1019	}
620		1020
621	# remove extcmds	1021	# remove extcmds
622	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	1022	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
623	delete $extcmd{$name};	1023	delete $EXTCMD{$name};
624	}	1024	}
625		1025
626	if (my $cb = $pkg->can ("unload")) {	1026	if (my $cb = $pkg->can ("unload")) {
627	eval {	1027	eval {
628	$cb->($pkg);	1028	$cb->($pkg);
…		…
632		1032
633	Symbol::delete_package $pkg;	1033	Symbol::delete_package $pkg;
634	}	1034	}
635		1035
636	sub load_extensions {	1036	sub load_extensions {
637	my $LIBDIR = maps_directory "perl";
638
639	for my $ext (<$LIBDIR/*.ext>) {	1037	for my $ext (<$LIBDIR/*.ext>) {
640	next unless -r $ext;	1038	next unless -r $ext;
641	eval {	1039	eval {
642	load_extension $ext;	1040	load_extension $ext;
643	1	1041	1
644	} or warn "$ext not loaded: $@";	1042	} or warn "$ext not loaded: $@";
645	}	1043	}
646	}	1044	}
647		1045
648	sub _perl_reload(&) {
649	my ($msg) = @_;
650
651	$msg->("reloading...");
652
653	eval {
654	# 1. cancel all watchers
655	$_->cancel for Event::all_watchers;
656
657	# 2. unload all extensions
658	for (@exts) {
659	$msg->("unloading <$_>");
660	unload_extension $_;
661	}
662
663	# 3. unload all modules loaded from $LIBDIR
664	while (my ($k, $v) = each %INC) {
665	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
666
667	$msg->("removing <$k>");
668	delete $INC{$k};
669
670	$k =~ s/\.pm$//;
671	$k =~ s/\//::/g;
672
673	if (my $cb = $k->can ("unload_module")) {
674	$cb->();
675	}
676
677	Symbol::delete_package $k;
678	}
679
680	# 4. get rid of safe::, as good as possible
681	Symbol::delete_package "safe::$_"
682	for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region);
683
684	# 5. remove register_script_function callbacks
685	# TODO
686
687	# 6. unload cf.pm "a bit"
688	delete $INC{"cf.pm"};
689
690	# don't, removes xs symbols, too,
691	# and global variables created in xs
692	#Symbol::delete_package __PACKAGE__;
693
694	# 7. reload cf.pm
695	$msg->("reloading cf.pm");
696	require cf;
697
698	$msg->("load extensions");
699	cf::load_extensions;
700
701	$msg->("reattach");
702	_global_reattach;
703	};
704	$msg->($@) if $@;
705
706	$msg->("reloaded");
707	};
708
709	sub perl_reload() {
710	_perl_reload {
711	warn $_[0];
712	print "$_[0]\n";
713	};
714	}
715
716	register_command "perl-reload", 0, sub {
717	my ($who, $arg) = @_;
718
719	if ($who->flag (FLAG_WIZ)) {
720	_perl_reload {
721	warn $_[0];
722	$who->message ($_[0]);
723	};
724	}
725	};
726
727	#############################################################################
728	# extcmd framework, basically convert ext <msg>
729	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
730
731	attach_to_players
732	on_extcmd => sub {
733	my ($pl, $buf) = @_;
734
735	my $msg = eval { from_json $buf };
736
737	if (ref $msg) {
738	if (my $cb = $extcmd{$msg->{msgtype}}) {
739	if (my %reply = $cb->[0]->($pl, $msg)) {
740	$pl->ext_reply ($msg->{msgid}, %reply);
741	}
742	}
743	} else {
744	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
745	}
746
747	cf::override;
748	},
749	;
750
751	#############################################################################	1046	#############################################################################
752	# load/save/clean perl data associated with a map	1047	# load/save/clean perl data associated with a map
753		1048
754	*cf::mapsupport::on_clean = sub {	1049	*cf::mapsupport::on_clean = sub {
755	my ($map) = @_;	1050	my ($map) = @_;
…		…
758	defined $path or return;	1053	defined $path or return;
759		1054
760	unlink "$path.pst";	1055	unlink "$path.pst";
761	};	1056	};
762		1057
763	attach_to_maps prio => -10000, package => cf::mapsupport::;	1058	cf::map->attach (prio => -10000, package => cf::mapsupport::);
764		1059
765	#############################################################################	1060	#############################################################################
766	# load/save perl data associated with player->ob objects	1061	# load/save perl data associated with player->ob objects
767		1062
768	sub all_objects(@) {	1063	sub all_objects(@) {
769	@_, map all_objects ($_->inv), @_	1064	@_, map all_objects ($_->inv), @_
770	}	1065	}
771		1066
772	# TODO: compatibility cruft, remove when no longer needed	1067	# TODO: compatibility cruft, remove when no longer needed
773	attach_to_players	1068	cf::player->attach (
774	on_load => sub {	1069	on_load => sub {
775	my ($pl, $path) = @_;	1070	my ($pl, $path) = @_;
776		1071
777	for my $o (all_objects $pl->ob) {	1072	for my $o (all_objects $pl->ob) {
778	if (my $value = $o->get_ob_key_value ("_perl_data")) {	1073	if (my $value = $o->get_ob_key_value ("_perl_data")) {
…		…
780		1075
781	%$o = %{ Storable::thaw pack "H*", $value };	1076	%$o = %{ Storable::thaw pack "H*", $value };
782	}	1077	}
783	}	1078	}
784	},	1079	},
785	;	1080	);
786		1081
787	#############################################################################	1082	#############################################################################
788	# core extensions - in perl	1083
		1084	=head2 CORE EXTENSIONS
		1085
		1086	Functions and methods that extend core crossfire objects.
		1087
		1088	=head3 cf::player
		1089
		1090	=over 4
789		1091
790	=item cf::player::exists $login	1092	=item cf::player::exists $login
791		1093
792	Returns true when the given account exists.	1094	Returns true when the given account exists.
793		1095
…		…
796	sub cf::player::exists($) {	1098	sub cf::player::exists($) {
797	cf::player::find $_[0]	1099	cf::player::find $_[0]
798	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	1100	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
799	}	1101	}
800		1102
		1103	=item $player->ext_reply ($msgid, $msgtype, %msg)
		1104
		1105	Sends an ext reply to the player.
		1106
		1107	=cut
		1108
		1109	sub cf::player::ext_reply($$$%) {
		1110	my ($self, $id, %msg) = @_;
		1111
		1112	$msg{msgid} = $id;
		1113
		1114	$self->send ("ext " . to_json \%msg);
		1115	}
		1116
		1117	=back
		1118
		1119
		1120	=head3 cf::map
		1121
		1122	=over 4
		1123
		1124	=cut
		1125
		1126	package cf::map;
		1127
		1128	use Fcntl;
		1129	use Coro::AIO;
		1130
		1131	our $MAX_RESET = 7200;
		1132	our $DEFAULT_RESET = 3600;
		1133
		1134	sub generate_random_map {
		1135	my ($path, $rmp) = @_;
		1136
		1137	# mit "rum" bekleckern, nicht
		1138	cf::map::_create_random_map
		1139	$path,
		1140	$rmp->{wallstyle}, $rmp->{wall_name}, $rmp->{floorstyle}, $rmp->{monsterstyle},
		1141	$rmp->{treasurestyle}, $rmp->{layoutstyle}, $rmp->{doorstyle}, $rmp->{decorstyle},
		1142	$rmp->{origin_map}, $rmp->{final_map}, $rmp->{exitstyle}, $rmp->{this_map},
		1143	$rmp->{exit_on_final_map},
		1144	$rmp->{xsize}, $rmp->{ysize},
		1145	$rmp->{expand2x}, $rmp->{layoutoptions1}, $rmp->{layoutoptions2}, $rmp->{layoutoptions3},
		1146	$rmp->{symmetry}, $rmp->{difficulty}, $rmp->{difficulty_given}, $rmp->{difficulty_increase},
		1147	$rmp->{dungeon_level}, $rmp->{dungeon_depth}, $rmp->{decoroptions}, $rmp->{orientation},
		1148	$rmp->{origin_y}, $rmp->{origin_x}, $rmp->{random_seed}, $rmp->{total_map_hp},
		1149	$rmp->{map_layout_style}, $rmp->{treasureoptions}, $rmp->{symmetry_used},
		1150	(cf::region::find $rmp->{region})
		1151	}
		1152
		1153	# and all this just because we cannot iterate over
		1154	# all maps in C++...
		1155	sub change_all_map_light {
		1156	my ($change) = @_;
		1157
		1158	$_->change_map_light ($change)
		1159	for grep $_->outdoor, values %cf::MAP;
		1160	}
		1161
		1162	sub try_load_header($) {
		1163	my ($path) = @_;
		1164
		1165	utf8::encode $path;
		1166	aio_open $path, O_RDONLY, 0
		1167	or return;
		1168
		1169	my $map = cf::map::new
		1170	or return;
		1171
		1172	$map->load_header ($path)
		1173	or return;
		1174
		1175	$map->{load_path} = $path;
		1176
		1177	$map
		1178	}
		1179
		1180	sub find_map {
		1181	my ($path, $origin) = @_;
		1182
		1183	#warn "find_map<$path,$origin>\n";#d#
		1184
		1185	$path = new cf::path $path, $origin && $origin->path;
		1186	my $key = $path->as_string;
		1187
		1188	cf::lock_wait "map_find:$key";
		1189
		1190	$cf::MAP{$key} || do {
		1191	my $guard = cf::lock_acquire "map_find:$key";
		1192
		1193	# do it the slow way
		1194	my $map = try_load_header $path->save_path;
		1195
		1196	if ($map) {
		1197	# safety
		1198	$map->{instantiate_time} = $cf::RUNTIME
		1199	if $map->{instantiate_time} > $cf::RUNTIME;
		1200	} else {
		1201	if (my $rmp = $path->random_map_params) {
		1202	$map = generate_random_map $key, $rmp;
		1203	} else {
		1204	$map = try_load_header $path->load_path;
		1205	}
		1206
		1207	$map or return;
		1208
		1209	$map->{load_original} = 1;
		1210	$map->{instantiate_time} = $cf::RUNTIME;
		1211	$map->instantiate;
		1212
		1213	# per-player maps become, after loading, normal maps
		1214	$map->per_player (0) if $path->{user_rel};
		1215	}
		1216
		1217	$map->path ($key);
		1218	$map->{path} = $path;
		1219	$map->{last_save} = $cf::RUNTIME;
		1220	$map->last_access ($cf::RUNTIME);
		1221
		1222	if ($map->should_reset) {
		1223	$map->reset;
		1224	undef $guard;
		1225	$map = find_map $path;
		1226	}
		1227
		1228	$cf::MAP{$key} = $map
		1229	}
		1230	}
		1231
		1232	sub load {
		1233	my ($self) = @_;
		1234
		1235	my $path = $self->{path};
		1236	my $guard = cf::lock_acquire "map_load:" . $path->as_string;
		1237
		1238	return if $self->in_memory != cf::MAP_SWAPPED;
		1239
		1240	$self->in_memory (cf::MAP_LOADING);
		1241
		1242	$self->alloc;
		1243	$self->load_objects ($self->{load_path}, 1)
		1244	or return;
		1245
		1246	$self->set_object_flag (cf::FLAG_OBJ_ORIGINAL, 1)
		1247	if delete $self->{load_original};
		1248
		1249	if (my $uniq = $path->uniq_path) {
		1250	utf8::encode $uniq;
		1251	if (aio_open $uniq, O_RDONLY, 0) {
		1252	$self->clear_unique_items;
		1253	$self->load_objects ($uniq, 0);
		1254	}
		1255	}
		1256
		1257	# now do the right thing for maps
		1258	$self->link_multipart_objects;
		1259
		1260	if ($self->{path}->is_style_map) {
		1261	$self->{deny_save} = 1;
		1262	$self->{deny_reset} = 1;
		1263	} else {
		1264	$self->fix_auto_apply;
		1265	$self->decay_objects;
		1266	$self->update_buttons;
		1267	$self->set_darkness_map;
		1268	$self->difficulty ($self->estimate_difficulty)
		1269	unless $self->difficulty;
		1270	$self->activate;
		1271	}
		1272
		1273	$self->in_memory (cf::MAP_IN_MEMORY);
		1274	}
		1275
		1276	sub load_map_sync {
		1277	my ($path, $origin) = @_;
		1278
		1279	#warn "load_map_sync<$path, $origin>\n";#d#
		1280
		1281	cf::sync_job {
		1282	my $map = cf::map::find_map $path, $origin
		1283	or return;
		1284	$map->load;
		1285	$map
		1286	}
		1287	}
		1288
		1289	sub save {
		1290	my ($self) = @_;
		1291
		1292	$self->{last_save} = $cf::RUNTIME;
		1293
		1294	return unless $self->dirty;
		1295
		1296	my $save = $self->{path}->save_path; utf8::encode $save;
		1297	my $uniq = $self->{path}->uniq_path; utf8::encode $uniq;
		1298
		1299	$self->{load_path} = $save;
		1300
		1301	return if $self->{deny_save};
		1302
		1303	if ($uniq) {
		1304	$self->save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS);
		1305	$self->save_objects ($uniq, cf::IO_UNIQUES);
		1306	} else {
		1307	$self->save_objects ($save, cf::IO_HEADER | cf::IO_OBJECTS | cf::IO_UNIQUES);
		1308	}
		1309	}
		1310
		1311	sub swap_out {
		1312	my ($self) = @_;
		1313
		1314	return if $self->players;
		1315	return if $self->in_memory != cf::MAP_IN_MEMORY;
		1316	return if $self->{deny_save};
		1317
		1318	$self->save;
		1319	$self->clear;
		1320	$self->in_memory (cf::MAP_SWAPPED);
		1321	}
		1322
		1323	sub reset_at {
		1324	my ($self) = @_;
		1325
		1326	# TODO: safety, remove and allow resettable per-player maps
		1327	return 1e99 if $self->{path}{user_rel};
		1328	return 1e99 if $self->{deny_reset};
		1329
		1330	my $time = $self->fixed_resettime ? $self->{instantiate_time} : $self->last_access;
		1331	my $to = List::Util::min $MAX_RESET, $self->reset_timeout || $DEFAULT_RESET;
		1332
		1333	$time + $to
		1334	}
		1335
		1336	sub should_reset {
		1337	my ($self) = @_;
		1338
		1339	$self->reset_at <= $cf::RUNTIME
		1340	}
		1341
		1342	sub unlink_save {
		1343	my ($self) = @_;
		1344
		1345	utf8::encode (my $save = $self->{path}->save_path);
		1346	aioreq_pri 3; IO::AIO::aio_unlink $save;
		1347	aioreq_pri 3; IO::AIO::aio_unlink "$save.pst";
		1348	}
		1349
		1350	sub rename {
		1351	my ($self, $new_path) = @_;
		1352
		1353	$self->unlink_save;
		1354
		1355	delete $cf::MAP{$self->path};
		1356	$self->{path} = new cf::path $new_path;
		1357	$self->path ($self->{path}->as_string);
		1358	$cf::MAP{$self->path} = $self;
		1359
		1360	$self->save;
		1361	}
		1362
		1363	sub reset {
		1364	my ($self) = @_;
		1365
		1366	return if $self->players;
		1367	return if $self->{path}{user_rel};#d#
		1368
		1369	warn "resetting map ", $self->path;#d#
		1370
		1371	delete $cf::MAP{$self->path};
		1372
		1373	$_->clear_links_to ($self) for values %cf::MAP;
		1374
		1375	$self->unlink_save;
		1376	$self->destroy;
		1377	}
		1378
		1379	my $nuke_counter = "aaaa";
		1380
		1381	sub nuke {
		1382	my ($self) = @_;
		1383
		1384	$self->{deny_save} = 1;
		1385	$self->reset_timeout (1);
		1386	$self->rename ("{nuke}/" . ($nuke_counter++));
		1387	$self->reset; # polite request, might not happen
		1388	}
		1389
		1390	sub customise_for {
		1391	my ($map, $ob) = @_;
		1392
		1393	if ($map->per_player) {
		1394	return cf::map::find_map "~" . $ob->name . "/" . $map->{path}{path};
		1395	}
		1396
		1397	$map
		1398	}
		1399
		1400	sub emergency_save {
		1401	local $cf::FREEZE = 1;
		1402
		1403	warn "enter emergency map save\n";
		1404
		1405	cf::sync_job {
		1406	warn "begin emergency map save\n";
		1407	$_->save for values %cf::MAP;
		1408	};
		1409
		1410	warn "end emergency map save\n";
		1411	}
		1412
		1413	package cf;
		1414
		1415	=back
		1416
		1417
		1418	=head3 cf::object::player
		1419
		1420	=over 4
		1421
801	=item $player->reply ($npc, $msg[, $flags])	1422	=item $player_object->reply ($npc, $msg[, $flags])
802		1423
803	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	1424	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
804	can be C<undef>. Does the right thing when the player is currently in a	1425	can be C<undef>. Does the right thing when the player is currently in a
805	dialogue with the given NPC character.	1426	dialogue with the given NPC character.
806		1427
807	=cut	1428	=cut
808		1429
809	# rough implementation of a future "reply" method that works	1430	# rough implementation of a future "reply" method that works
810	# with dialog boxes.	1431	# with dialog boxes.
		1432	#TODO: the first argument must go, split into a $npc->reply_to ( method
811	sub cf::object::player::reply($$$;$) {	1433	sub cf::object::player::reply($$$;$) {
812	my ($self, $npc, $msg, $flags) = @_;	1434	my ($self, $npc, $msg, $flags) = @_;
813		1435
814	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	1436	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
815		1437
…		…
819	$msg = $npc->name . " says: $msg" if $npc;	1441	$msg = $npc->name . " says: $msg" if $npc;
820	$self->message ($msg, $flags);	1442	$self->message ($msg, $flags);
821	}	1443	}
822	}	1444	}
823		1445
824	=item $player->ext_reply ($msgid, $msgtype, %msg)	1446	=item $player_object->may ("access")
825		1447
826	Sends an ext reply to the player.	1448	Returns wether the given player is authorized to access resource "access"
		1449	(e.g. "command_wizcast").
827		1450
828	=cut	1451	=cut
829		1452
830	sub cf::player::ext_reply($$$%) {	1453	sub cf::object::player::may {
		1454	my ($self, $access) = @_;
		1455
		1456	$self->flag (cf::FLAG_WIZ) ||
		1457	(ref $cf::CFG{"may_$access"}
		1458	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		1459	: $cf::CFG{"may_$access"})
		1460	}
		1461
		1462	=item $player_object->enter_link
		1463
		1464	Freezes the player and moves him/her to a special map (C<{link}>).
		1465
		1466	The player should be reaosnably safe there for short amounts of time. You
		1467	I<MUST> call C<leave_link> as soon as possible, though.
		1468
		1469	=item $player_object->leave_link ($map, $x, $y)
		1470
		1471	Moves the player out of the specila link map onto the given map. If the
		1472	map is not valid (or omitted), the player will be moved back to the
		1473	location he/she was before the call to C<enter_link>, or, if that fails,
		1474	to the emergency map position.
		1475
		1476	Might block.
		1477
		1478	=cut
		1479
		1480	sub cf::object::player::enter_link {
		1481	my ($self) = @_;
		1482
		1483	$self->deactivate_recursive;
		1484
		1485	return if $self->map == $LINK_MAP;
		1486
		1487	$self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
		1488	if $self->map;
		1489
		1490	$self->enter_map ($LINK_MAP, 20, 20);
		1491	}
		1492
		1493	sub cf::object::player::leave_link {
		1494	my ($self, $map, $x, $y) = @_;
		1495
		1496	my $link_pos = delete $self->{_link_pos};
		1497
		1498	unless ($map) {
		1499	# restore original map position
		1500	($map, $x, $y) = @{ $link_pos || [] };
		1501	$map = cf::map::find_map $map;
		1502
		1503	unless ($map) {
		1504	($map, $x, $y) = @$EMERGENCY_POSITION;
		1505	$map = cf::map::find_map $map
		1506	or die "FATAL: cannot load emergency map\n";
		1507	}
		1508	}
		1509
		1510	($x, $y) = (-1, -1)
		1511	unless (defined $x) && (defined $y);
		1512
		1513	# use -1 or undef as default coordinates, not 0, 0
		1514	($x, $y) = ($map->enter_x, $map->enter_y)
		1515	if $x <=0 && $y <= 0;
		1516
		1517	$map->load;
		1518
		1519	$self->activate_recursive;
		1520	$self->enter_map ($map, $x, $y);
		1521	}
		1522
		1523	cf::player->attach (
		1524	on_logout => sub {
		1525	my ($pl) = @_;
		1526
		1527	# abort map switching before logout
		1528	if ($pl->ob->{_link_pos}) {
		1529	cf::sync_job {
		1530	$pl->ob->leave_link
		1531	};
		1532	}
		1533	},
		1534	on_login => sub {
		1535	my ($pl) = @_;
		1536
		1537	# try to abort aborted map switching on player login :)
		1538	# should happen only on crashes
		1539	if ($pl->ob->{_link_pos}) {
		1540	$pl->ob->enter_link;
		1541	Coro::async {
		1542	# we need this sleep as the login has a concurrent enter_exit running
		1543	# and this sleep increases chances of the player not ending up in scorn
		1544	Coro::Timer::sleep 1;
		1545	$pl->ob->leave_link;
		1546	};
		1547	}
		1548	},
		1549	);
		1550
		1551	=item $player_object->goto_map ($path, $x, $y)
		1552
		1553	=cut
		1554
		1555	sub cf::object::player::goto_map {
		1556	my ($self, $path, $x, $y) = @_;
		1557
		1558	$self->enter_link;
		1559
		1560	(Coro::async {
		1561	$path = new cf::path $path;
		1562
		1563	my $map = cf::map::find_map $path->as_string;
		1564	$map = $map->customise_for ($self) if $map;
		1565
		1566	# warn "entering ", $map->path, " at ($x, $y)\n"
		1567	# if $map;
		1568
		1569	$map or $self->message ("The exit is closed", cf::NDI_UNIQUE | cf::NDI_RED);
		1570
		1571	$self->leave_link ($map, $x, $y);
		1572	})->prio (1);
		1573	}
		1574
		1575	=item $player_object->enter_exit ($exit_object)
		1576
		1577	=cut
		1578
		1579	sub parse_random_map_params {
		1580	my ($spec) = @_;
		1581
		1582	my $rmp = { # defaults
		1583	xsize => 10,
		1584	ysize => 10,
		1585	};
		1586
		1587	for (split /\n/, $spec) {
		1588	my ($k, $v) = split /\s+/, $_, 2;
		1589
		1590	$rmp->{lc $k} = $v if (length $k) && (length $v);
		1591	}
		1592
		1593	$rmp
		1594	}
		1595
		1596	sub prepare_random_map {
		1597	my ($exit) = @_;
		1598
		1599	# all this does is basically replace the /! path by
		1600	# a new random map path (?random/...) with a seed
		1601	# that depends on the exit object
		1602
		1603	my $rmp = parse_random_map_params $exit->msg;
		1604
		1605	if ($exit->map) {
		1606	$rmp->{region} = $exit->map->region_name;
		1607	$rmp->{origin_map} = $exit->map->path;
		1608	$rmp->{origin_x} = $exit->x;
		1609	$rmp->{origin_y} = $exit->y;
		1610	}
		1611
		1612	$rmp->{random_seed} ||= $exit->random_seed;
		1613
		1614	my $data = cf::to_json $rmp;
		1615	my $md5 = Digest::MD5::md5_hex $data;
		1616
		1617	if (my $fh = aio_open "$cf::RANDOM_MAPS/$md5.meta", O_WRONLY | O_CREAT, 0666) {
		1618	aio_write $fh, 0, (length $data), $data, 0;
		1619
		1620	$exit->slaying ("?random/$md5");
		1621	$exit->msg (undef);
		1622	}
		1623	}
		1624
		1625	sub cf::object::player::enter_exit {
831	my ($self, $id, %msg) = @_;	1626	my ($self, $exit) = @_;
832		1627
833	$msg{msgid} = $id;	1628	return unless $self->type == cf::PLAYER;
834		1629
835	$self->send ("ext " . to_json \%msg);	1630	$self->enter_link;
836	}
837		1631
838	#############################################################################	1632	(Coro::async {
839	# map scripting support	1633	unless (eval {
		1634
		1635	prepare_random_map $exit
		1636	if $exit->slaying eq "/!";
		1637
		1638	my $path = new cf::path $exit->slaying, $exit->map && $exit->map->path;
		1639	$self->goto_map ($path, $exit->stats->hp, $exit->stats->sp);
		1640
		1641	1;
		1642	}) {
		1643	$self->message ("Something went wrong deep within the crossfire server. "
		1644	. "I'll try to bring you back to the map you were before. "
		1645	. "Please report this to the dungeon master",
		1646	cf::NDI_UNIQUE | cf::NDI_RED);
		1647
		1648	warn "ERROR in enter_exit: $@";
		1649	$self->leave_link;
		1650	}
		1651	})->prio (1);
		1652	}
		1653
		1654	=head3 cf::client
		1655
		1656	=over 4
		1657
		1658	=item $client->send_drawinfo ($text, $flags)
		1659
		1660	Sends a drawinfo packet to the client. Circumvents output buffering so
		1661	should not be used under normal circumstances.
		1662
		1663	=cut
		1664
		1665	sub cf::client::send_drawinfo {
		1666	my ($self, $text, $flags) = @_;
		1667
		1668	utf8::encode $text;
		1669	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		1670	}
		1671
		1672
		1673	=item $success = $client->query ($flags, "text", \&cb)
		1674
		1675	Queues a query to the client, calling the given callback with
		1676	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		1677	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		1678
		1679	Queries can fail, so check the return code. Or don't, as queries will become
		1680	reliable at some point in the future.
		1681
		1682	=cut
		1683
		1684	sub cf::client::query {
		1685	my ($self, $flags, $text, $cb) = @_;
		1686
		1687	return unless $self->state == ST_PLAYING
		1688	|| $self->state == ST_SETUP
		1689	|| $self->state == ST_CUSTOM;
		1690
		1691	$self->state (ST_CUSTOM);
		1692
		1693	utf8::encode $text;
		1694	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		1695
		1696	$self->send_packet ($self->{query_queue}[0][0])
		1697	if @{ $self->{query_queue} } == 1;
		1698	}
		1699
		1700	cf::client->attach (
		1701	on_reply => sub {
		1702	my ($ns, $msg) = @_;
		1703
		1704	# this weird shuffling is so that direct followup queries
		1705	# get handled first
		1706	my $queue = delete $ns->{query_queue};
		1707
		1708	(shift @$queue)->[1]->($msg);
		1709
		1710	push @{ $ns->{query_queue} }, @$queue;
		1711
		1712	if (@{ $ns->{query_queue} } == @$queue) {
		1713	if (@$queue) {
		1714	$ns->send_packet ($ns->{query_queue}[0][0]);
		1715	} else {
		1716	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		1717	}
		1718	}
		1719	},
		1720	);
		1721
		1722	=item $client->coro (\&cb)
		1723
		1724	Create a new coroutine, running the specified callback. The coroutine will
		1725	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1726	or loss of connection).
		1727
		1728	=cut
		1729
		1730	sub cf::client::coro {
		1731	my ($self, $cb) = @_;
		1732
		1733	my $coro; $coro = async {
		1734	eval {
		1735	$cb->();
		1736	};
		1737	warn $@ if $@;
		1738	};
		1739
		1740	$coro->on_destroy (sub {
		1741	delete $self->{_coro}{$coro+0};
		1742	});
		1743
		1744	$self->{_coro}{$coro+0} = $coro;
		1745
		1746	$coro
		1747	}
		1748
		1749	cf::client->attach (
		1750	on_destroy => sub {
		1751	my ($ns) = @_;
		1752
		1753	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1754	},
		1755	);
		1756
		1757	=back
		1758
		1759
		1760	=head2 SAFE SCRIPTING
		1761
		1762	Functions that provide a safe environment to compile and execute
		1763	snippets of perl code without them endangering the safety of the server
		1764	itself. Looping constructs, I/O operators and other built-in functionality
		1765	is not available in the safe scripting environment, and the number of
		1766	functions and methods that can be called is greatly reduced.
		1767
		1768	=cut
840		1769
841	our $safe = new Safe "safe";	1770	our $safe = new Safe "safe";
842	our $safe_hole = new Safe::Hole;	1771	our $safe_hole = new Safe::Hole;
843		1772
844	$SIG{FPE} = 'IGNORE';	1773	$SIG{FPE} = 'IGNORE';
845		1774
846	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	1775	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
847		1776
848	# here we export the classes and methods available to script code	1777	# here we export the classes and methods available to script code
849		1778
		1779	=pod
		1780
		1781	The following fucntions and emthods are available within a safe environment:
		1782
		1783	cf::object contr pay_amount pay_player map
		1784	cf::object::player player
		1785	cf::player peaceful
		1786	cf::map trigger
		1787
		1788	=cut
		1789
850	for (	1790	for (
851	["cf::object" => qw(contr pay_amount pay_player)],	1791	["cf::object" => qw(contr pay_amount pay_player map)],
852	["cf::object::player" => qw(player)],	1792	["cf::object::player" => qw(player)],
853	["cf::player" => qw(peaceful)],	1793	["cf::player" => qw(peaceful)],
		1794	["cf::map" => qw(trigger)],
854	) {	1795	) {
855	no strict 'refs';	1796	no strict 'refs';
856	my ($pkg, @funs) = @$_;	1797	my ($pkg, @funs) = @$_;
857	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	1798	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
858	for @funs;	1799	for @funs;
859	}	1800	}
		1801
		1802	=over 4
		1803
		1804	=item @retval = safe_eval $code, [var => value, ...]
		1805
		1806	Compiled and executes the given perl code snippet. additional var/value
		1807	pairs result in temporary local (my) scalar variables of the given name
		1808	that are available in the code snippet. Example:
		1809
		1810	my $five = safe_eval '$first + $second', first => 1, second => 4;
		1811
		1812	=cut
860		1813
861	sub safe_eval($;@) {	1814	sub safe_eval($;@) {
862	my ($code, %vars) = @_;	1815	my ($code, %vars) = @_;
863		1816
864	my $qcode = $code;	1817	my $qcode = $code;
…		…
887	}	1840	}
888		1841
889	wantarray ? @res : $res[0]	1842	wantarray ? @res : $res[0]
890	}	1843	}
891		1844
		1845	=item cf::register_script_function $function => $cb
		1846
		1847	Register a function that can be called from within map/npc scripts. The
		1848	function should be reasonably secure and should be put into a package name
		1849	like the extension.
		1850
		1851	Example: register a function that gets called whenever a map script calls
		1852	C<rent::overview>, as used by the C<rent> extension.
		1853
		1854	cf::register_script_function "rent::overview" => sub {
		1855	...
		1856	};
		1857
		1858	=cut
		1859
892	sub register_script_function {	1860	sub register_script_function {
893	my ($fun, $cb) = @_;	1861	my ($fun, $cb) = @_;
894		1862
895	no strict 'refs';	1863	no strict 'refs';
896	*{"safe::$fun"} = $safe_hole->wrap ($cb);	1864	*{"safe::$fun"} = $safe_hole->wrap ($cb);
897	}	1865	}
898		1866
		1867	=back
		1868
		1869	=cut
		1870
		1871	#############################################################################
		1872
		1873	=head2 EXTENSION DATABASE SUPPORT
		1874
		1875	Crossfire maintains a very simple database for extension use. It can
		1876	currently store anything that can be serialised using Storable, which
		1877	excludes objects.
		1878
		1879	The parameter C<$family> should best start with the name of the extension
		1880	using it, it should be unique.
		1881
		1882	=over 4
		1883
		1884	=item $hashref = cf::db_get $family
		1885
		1886	Return a hashref for use by the extension C<$family>, which can be
		1887	modified. After modifications, you have to call C<cf::db_dirty> or
		1888	C<cf::db_sync>.
		1889
		1890	=item $value = cf::db_get $family => $key
		1891
		1892	Returns a single value from the database
		1893
		1894	=item cf::db_put $family => $hashref
		1895
		1896	Stores the given family hashref into the database. Updates are delayed, if
		1897	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		1898
		1899	=item cf::db_put $family => $key => $value
		1900
		1901	Stores the given C<$value> in the family hash. Updates are delayed, if you
		1902	want the data to be synced to disk immediately, use C<cf::db_sync>.
		1903
		1904	=item cf::db_dirty
		1905
		1906	Marks the database as dirty, to be updated at a later time.
		1907
		1908	=item cf::db_sync
		1909
		1910	Immediately write the database to disk I<if it is dirty>.
		1911
		1912	=cut
		1913
		1914	our $DB;
		1915
		1916	{
		1917	my $path = cf::localdir . "/database.pst";
		1918
		1919	sub db_load() {
		1920	$DB = stat $path ? Storable::retrieve $path : { };
		1921	}
		1922
		1923	my $pid;
		1924
		1925	sub db_save() {
		1926	waitpid $pid, 0 if $pid;
		1927	if (0 == ($pid = fork)) {
		1928	$DB->{_meta}{version} = 1;
		1929	Storable::nstore $DB, "$path~";
		1930	rename "$path~", $path;
		1931	cf::_exit 0 if defined $pid;
		1932	}
		1933	}
		1934
		1935	my $dirty;
		1936
		1937	sub db_sync() {
		1938	db_save if $dirty;
		1939	undef $dirty;
		1940	}
		1941
		1942	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		1943	db_sync;
		1944	});
		1945
		1946	sub db_dirty() {
		1947	$dirty = 1;
		1948	$idle->start;
		1949	}
		1950
		1951	sub db_get($;$) {
		1952	@_ >= 2
		1953	? $DB->{$_[0]}{$_[1]}
		1954	: ($DB->{$_[0]} ||= { })
		1955	}
		1956
		1957	sub db_put($$;$) {
		1958	if (@_ >= 3) {
		1959	$DB->{$_[0]}{$_[1]} = $_[2];
		1960	} else {
		1961	$DB->{$_[0]} = $_[1];
		1962	}
		1963	db_dirty;
		1964	}
		1965
		1966	cf::global->attach (
		1967	prio => 10000,
		1968	on_cleanup => sub {
		1969	db_sync;
		1970	},
		1971	);
		1972	}
		1973
899	#############################################################################	1974	#############################################################################
900	# the server's main()	1975	# the server's main()
901		1976
		1977	sub cfg_load {
		1978	open my $fh, "<:utf8", cf::confdir . "/config"
		1979	or return;
		1980
		1981	local $/;
		1982	*CFG = YAML::Syck::Load <$fh>;
		1983	}
		1984
902	sub main {	1985	sub main {
		1986	# we must not ever block the main coroutine
		1987	local $Coro::idle = sub {
		1988	Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
		1989	(Coro::unblock_sub {
		1990	Event::one_event;
		1991	})->();
		1992	};
		1993
		1994	cfg_load;
		1995	db_load;
903	load_extensions;	1996	load_extensions;
904	Event::loop;	1997	Event::loop;
905	}	1998	}
906		1999
907	#############################################################################	2000	#############################################################################
908	# initialisation	2001	# initialisation
909		2002
		2003	sub reload() {
		2004	# can/must only be called in main
		2005	if ($Coro::current != $Coro::main) {
		2006	warn "can only reload from main coroutine\n";
		2007	return;
		2008	}
		2009
		2010	warn "reloading...";
		2011
		2012	local $FREEZE = 1;
		2013	cf::emergency_save;
		2014
		2015	eval {
		2016	# if anything goes wrong in here, we should simply crash as we already saved
		2017
		2018	# cancel all watchers
		2019	for (Event::all_watchers) {
		2020	$_->cancel if $_->data & WF_AUTOCANCEL;
		2021	}
		2022
		2023	# cancel all extension coros
		2024	$_->cancel for values %EXT_CORO;
		2025	%EXT_CORO = ();
		2026
		2027	# unload all extensions
		2028	for (@exts) {
		2029	warn "unloading <$_>";
		2030	unload_extension $_;
		2031	}
		2032
		2033	# unload all modules loaded from $LIBDIR
		2034	while (my ($k, $v) = each %INC) {
		2035	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		2036
		2037	warn "removing <$k>";
		2038	delete $INC{$k};
		2039
		2040	$k =~ s/\.pm$//;
		2041	$k =~ s/\//::/g;
		2042
		2043	if (my $cb = $k->can ("unload_module")) {
		2044	$cb->();
		2045	}
		2046
		2047	Symbol::delete_package $k;
		2048	}
		2049
		2050	# sync database to disk
		2051	cf::db_sync;
		2052	IO::AIO::flush;
		2053
		2054	# get rid of safe::, as good as possible
		2055	Symbol::delete_package "safe::$_"
		2056	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		2057
		2058	# remove register_script_function callbacks
		2059	# TODO
		2060
		2061	# unload cf.pm "a bit"
		2062	delete $INC{"cf.pm"};
		2063
		2064	# don't, removes xs symbols, too,
		2065	# and global variables created in xs
		2066	#Symbol::delete_package __PACKAGE__;
		2067
		2068	# reload cf.pm
		2069	warn "reloading cf.pm";
		2070	require cf;
		2071	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		2072
		2073	# load config and database again
		2074	cf::cfg_load;
		2075	cf::db_load;
		2076
		2077	# load extensions
		2078	warn "load extensions";
		2079	cf::load_extensions;
		2080
		2081	# reattach attachments to objects
		2082	warn "reattach";
		2083	_global_reattach;
		2084	};
		2085
		2086	if ($@) {
		2087	warn $@;
		2088	warn "error while reloading, exiting.";
		2089	exit 1;
		2090	}
		2091
		2092	warn "reloaded successfully";
		2093	};
		2094
		2095	#############################################################################
		2096
		2097	unless ($LINK_MAP) {
		2098	$LINK_MAP = cf::map::new;
		2099
		2100	$LINK_MAP->width (41);
		2101	$LINK_MAP->height (41);
		2102	$LINK_MAP->alloc;
		2103	$LINK_MAP->path ("{link}");
		2104	$LINK_MAP->{path} = bless { path => "{link}" }, "cf::path";
		2105	$LINK_MAP->in_memory (MAP_IN_MEMORY);
		2106
		2107	# dirty hack because... archetypes are not yet loaded
		2108	Event->timer (
		2109	after => 2,
		2110	cb => sub {
		2111	$_[0]->w->cancel;
		2112
		2113	# provide some exits "home"
		2114	my $exit = cf::object::new "exit";
		2115
		2116	$exit->slaying ($EMERGENCY_POSITION->[0]);
		2117	$exit->stats->hp ($EMERGENCY_POSITION->[1]);
		2118	$exit->stats->sp ($EMERGENCY_POSITION->[2]);
		2119
		2120	$LINK_MAP->insert ($exit->clone, 19, 19);
		2121	$LINK_MAP->insert ($exit->clone, 19, 20);
		2122	$LINK_MAP->insert ($exit->clone, 19, 21);
		2123	$LINK_MAP->insert ($exit->clone, 20, 19);
		2124	$LINK_MAP->insert ($exit->clone, 20, 21);
		2125	$LINK_MAP->insert ($exit->clone, 21, 19);
		2126	$LINK_MAP->insert ($exit->clone, 21, 20);
		2127	$LINK_MAP->insert ($exit->clone, 21, 21);
		2128
		2129	$exit->destroy;
		2130	});
		2131
		2132	$LINK_MAP->{deny_save} = 1;
		2133	$LINK_MAP->{deny_reset} = 1;
		2134
		2135	$cf::MAP{$LINK_MAP->path} = $LINK_MAP;
		2136	}
		2137
910	register "<global>", __PACKAGE__;	2138	register "<global>", __PACKAGE__;
911		2139
		2140	register_command "reload" => sub {
		2141	my ($who, $arg) = @_;
		2142
		2143	if ($who->flag (FLAG_WIZ)) {
		2144	$who->message ("start of reload.");
		2145	reload;
		2146	$who->message ("end of reload.");
		2147	}
		2148	};
		2149
912	unshift @INC, $LIBDIR;	2150	unshift @INC, $LIBDIR;
913		2151
914	$TICK_WATCHER = Event->timer (	2152	$TICK_WATCHER = Event->timer (
		2153	reentrant => 0,
915	prio => 1,	2154	prio => 0,
916	at => $NEXT_TICK || 1,	2155	at => $NEXT_TICK || $TICK,
		2156	data => WF_AUTOCANCEL,
917	cb => sub {	2157	cb => sub {
		2158	unless ($FREEZE) {
918	cf::server_tick; # one server iteration	2159	cf::server_tick; # one server iteration
		2160	$RUNTIME += $TICK;
		2161	}
919		2162
920	my $NOW = Event::time;
921	$NEXT_TICK += $TICK;	2163	$NEXT_TICK += $TICK;
922		2164
923	# if we are delayed by four ticks, skip them all	2165	# if we are delayed by four ticks or more, skip them all
924	$NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;	2166	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
925		2167
926	$TICK_WATCHER->at ($NEXT_TICK);	2168	$TICK_WATCHER->at ($NEXT_TICK);
927	$TICK_WATCHER->start;	2169	$TICK_WATCHER->start;
928	},	2170	},
929	);	2171	);
930		2172
		2173	IO::AIO::max_poll_time $TICK * 0.2;
		2174
		2175	Event->io (
		2176	fd => IO::AIO::poll_fileno,
		2177	poll => 'r',
		2178	prio => 5,
		2179	data => WF_AUTOCANCEL,
		2180	cb => \&IO::AIO::poll_cb,
		2181	);
		2182
		2183	Event->timer (
		2184	data => WF_AUTOCANCEL,
		2185	after => 0,
		2186	interval => 10,
		2187	cb => sub {
		2188	(Coro::unblock_sub {
		2189	write_runtime
		2190	or warn "ERROR: unable to write runtime file: $!";
		2191	})->();
		2192	},
		2193	);
		2194
931	1	2195	1
932		2196

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