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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.28 by root, Sun Jul 30 17:42:14 2006 UTC vs.
Revision 1.106 by root, Sun Dec 31 17:29:22 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;
10	use Event;	14	use Coro::Event;
		15	use Coro::Timer;
		16	use Coro::Signal;
		17	use Coro::Semaphore;
		18	use Coro::AIO;
		19
		20	use Fcntl;
		21	use IO::AIO 2.31 ();
		22	use YAML::Syck ();
		23	use Time::HiRes;
		24
11	$Event::Eval = 1; # no idea why this is required, but it is	25	use Event; $Event::Eval = 1; # no idea why this is required, but it is
12		26
13	use strict;	27	# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
		28	$YAML::Syck::ImplicitUnicode = 1;
14		29
15	our %COMMAND;	30	$Coro::main->prio (2); # run main coroutine ("the server") with very high priority
		31
		32	sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
		33
		34	our %COMMAND = ();
		35	our %COMMAND_TIME = ();
		36	our %EXTCMD = ();
		37
16	our @EVENT;	38	our @EVENT;
17	our %PROP_TYPE;	39	our $LIBDIR = datadir . "/ext";
18	our %PROP_IDX;	40
19	our $LIBDIR = maps_directory "perl";	41	our $TICK = MAX_TIME * 1e-6;
		42	our $TICK_WATCHER;
		43	our $NEXT_TICK;
		44	our $NOW;
		45
		46	our %CFG;
		47
		48	our $UPTIME; $UPTIME ||= time;
		49	our $RUNTIME;
		50
		51	our %MAP; # all maps
		52	our $LINK_MAP; # the special {link} map
		53	our $FREEZE;
		54
		55	binmode STDOUT;
		56	binmode STDERR;
		57
		58	# read virtual server time, if available
		59	unless ($RUNTIME || !-e cf::localdir . "/runtime") {
		60	open my $fh, "<", cf::localdir . "/runtime"
		61	or die "unable to read runtime file: $!";
		62	$RUNTIME = <$fh> + 0.;
		63	}
		64
		65	mkdir cf::localdir;
		66	mkdir cf::localdir . "/" . cf::playerdir;
		67	mkdir cf::localdir . "/" . cf::tmpdir;
		68	mkdir cf::localdir . "/" . cf::uniquedir;
		69
		70	our %EXT_CORO;
		71
		72	#############################################################################
		73
		74	=head2 GLOBAL VARIABLES
		75
		76	=over 4
		77
		78	=item $cf::UPTIME
		79
		80	The timestamp of the server start (so not actually an uptime).
		81
		82	=item $cf::RUNTIME
		83
		84	The time this server has run, starts at 0 and is increased by $cf::TICK on
		85	every server tick.
		86
		87	=item $cf::LIBDIR
		88
		89	The perl library directory, where extensions and cf-specific modules can
		90	be found. It will be added to C<@INC> automatically.
		91
		92	=item $cf::NOW
		93
		94	The time of the last (current) server tick.
		95
		96	=item $cf::TICK
		97
		98	The interval between server ticks, in seconds.
		99
		100	=item %cf::CFG
		101
		102	Configuration for the server, loaded from C</etc/crossfire/config>, or
		103	from wherever your confdir points to.
		104
		105	=back
		106
		107	=cut
20		108
21	BEGIN {	109	BEGIN {
22	@EVENT = map lc, @EVENT;
23
24	*CORE::GLOBAL::warn = sub {	110	*CORE::GLOBAL::warn = sub {
25	my $msg = join "", @_;	111	my $msg = join "", @_;
		112	utf8::encode $msg;
		113
26	$msg .= "\n"	114	$msg .= "\n"
27	unless $msg =~ /\n$/;	115	unless $msg =~ /\n$/;
28		116
29	print STDERR "cfperl: $msg";
30	LOG llevError, "cfperl: $msg";	117	LOG llevError, "cfperl: $msg";
31	};	118	};
32	}	119	}
33		120
34	my %ignore_set = (MAP_PROP_PATH => 1); # I hate the plug-in api. Deeply!	121	@safe::cf::global::ISA = @cf::global::ISA = 'cf::attachable';
		122	@safe::cf::object::ISA = @cf::object::ISA = 'cf::attachable';
		123	@safe::cf::player::ISA = @cf::player::ISA = 'cf::attachable';
		124	@safe::cf::client::ISA = @cf::client::ISA = 'cf::attachable';
		125	@safe::cf::map::ISA = @cf::map::ISA = 'cf::attachable';
		126	@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
35		127
36	# generate property mutators	128	# we bless all objects into (empty) derived classes to force a method lookup
37	sub prop_gen {	129	# within the Safe compartment.
38	my ($prefix, $class) = @_;	130	for my $pkg (qw(
39		131	cf::global cf::attachable
		132	cf::object cf::object::player
		133	cf::client cf::player
		134	cf::arch cf::living
		135	cf::map cf::party cf::region
		136	)) {
40	no strict 'refs';	137	no strict 'refs';
41
42	for my $prop (keys %PROP_TYPE) {
43	$prop =~ /^\Q$prefix\E_(.*$)/ or next;
44	my $sub = lc $1;
45
46	my $type = $PROP_TYPE{$prop};
47	my $idx = $PROP_IDX {$prop};
48
49	*{"$class\::get_$sub"} = *{"$class\::$sub"} = sub {
50	$_[0]->get_property ($type, $idx)
51	};
52
53	*{"$class\::set_$sub"} = sub {
54	$_[0]->set_property ($type, $idx, $_[1]);
55	} unless $ignore_set{$prop};
56	}
57	}
58
59	# auto-generate most of the API
60
61	prop_gen OBJECT_PROP => "cf::object";
62	# CFAPI_OBJECT_ANIMATION?
63	prop_gen PLAYER_PROP => "cf::object::player";
64
65	prop_gen MAP_PROP => "cf::map";
66	prop_gen ARCH_PROP => "cf::arch";
67
68	# guessed hierarchies
69
70	@ext::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
71	@ext::cf::object::map::ISA = @cf::object::map::ISA = 'cf::object';
72
73	# we bless all objects into derived classes to force a method lookup
74	# within the Safe compartment.
75	for my $pkg (qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region)) {
76	no strict 'refs';
77	@{"ext::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;	138	@{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
78	}	139	}
79		140
80	$Event::DIED = sub {	141	$Event::DIED = sub {
81	warn "error in event callback: @_";	142	warn "error in event callback: @_";
82	};	143	};
83		144
84	my %ext_pkg;	145	my %ext_pkg;
85	my @exts;	146	my @exts;
86	my @hook;	147	my @hook;
87	my %command;
88	my %extcmd;
89		148
90	sub inject_event {	149	=head2 UTILITY FUNCTIONS
91	my $extension = shift;	150
		151	=over 4
		152
		153	=cut
		154
		155	use JSON::Syck (); # TODO# replace by JSON::PC once working
		156
		157	=item $ref = cf::from_json $json
		158
		159	Converts a JSON string into the corresponding perl data structure.
		160
		161	=cut
		162
		163	sub from_json($) {
		164	$JSON::Syck::ImplicitUnicode = 1; # work around JSON::Syck bugs
		165	JSON::Syck::Load $_[0]
		166	}
		167
		168	=item $json = cf::to_json $ref
		169
		170	Converts a perl data structure into its JSON representation.
		171
		172	=cut
		173
		174	sub to_json($) {
		175	$JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
		176	JSON::Syck::Dump $_[0]
		177	}
		178
		179	=item cf::sync_job { BLOCK }
		180
		181	The design of crossfire+ requires that the main coro ($Coro::main) is
		182	always able to handle events or runnable, as crossfire+ is only partly
		183	reentrant. Thus "blocking" it by e.g. waiting for I/O is not acceptable.
		184
		185	If it must be done, put the blocking parts into C<sync_job>. This will run
		186	the given BLOCK in another coroutine while waiting for the result. The
		187	server will be frozen during this time, so the block should either finish
		188	fast or be very important.
		189
		190	=cut
		191
		192	sub sync_job(&) {
		193	my ($job) = @_;
		194
		195	my $busy = 1;
		196	my @res;
		197
		198	# TODO: use suspend/resume instead
		199	local $FREEZE = 1;
		200
		201	my $coro = Coro::async {
		202	@res = eval { $job->() };
		203	warn $@ if $@;
		204	undef $busy;
		205	};
		206
		207	if ($Coro::current == $Coro::main) {
		208	$coro->prio (Coro::PRIO_MAX);
		209	while ($busy) {
		210	Coro::cede_notself;
		211	Event::one_event unless Coro::nready;
		212	}
		213	} else {
		214	$coro->join;
		215	}
		216
		217	wantarray ? @res : $res[0]
		218	}
		219
		220	=item $coro = cf::coro { BLOCK }
		221
		222	Creates and returns a new coro. This coro is automcatially being canceled
		223	when the extension calling this is being unloaded.
		224
		225	=cut
		226
		227	sub coro(&) {
		228	my $cb = shift;
		229
		230	my $coro; $coro = async {
		231	eval {
		232	$cb->();
		233	};
		234	warn $@ if $@;
		235	};
		236
		237	$coro->on_destroy (sub {
		238	delete $EXT_CORO{$coro+0};
		239	});
		240	$EXT_CORO{$coro+0} = $coro;
		241
		242	$coro
		243	}
		244
		245	=back
		246
		247	=cut
		248
		249	#############################################################################
		250
		251	=head2 ATTACHABLE OBJECTS
		252
		253	Many objects in crossfire are so-called attachable objects. That means you can
		254	attach callbacks/event handlers (a collection of which is called an "attachment")
		255	to it. All such attachable objects support the following methods.
		256
		257	In the following description, CLASS can be any of C<global>, C<object>
		258	C<player>, C<client> or C<map> (i.e. the attachable objects in
		259	crossfire+).
		260
		261	=over 4
		262
		263	=item $attachable->attach ($attachment, key => $value...)
		264
		265	=item $attachable->detach ($attachment)
		266
		267	Attach/detach a pre-registered attachment to a specific object and give it
		268	the specified key/value pairs as arguments.
		269
		270	Example, attach a minesweeper attachment to the given object, making it a
		271	10x10 minesweeper game:
		272
		273	$obj->attach (minesweeper => width => 10, height => 10);
		274
		275	=item $bool = $attachable->attached ($name)
		276
		277	Checks wether the named attachment is currently attached to the object.
		278
		279	=item cf::CLASS->attach ...
		280
		281	=item cf::CLASS->detach ...
		282
		283	Define an anonymous attachment and attach it to all objects of the given
		284	CLASS. See the next function for an explanation of its arguments.
		285
		286	You can attach to global events by using the C<cf::global> class.
		287
		288	Example, log all player logins:
		289
		290	cf::player->attach (
		291	on_login => sub {
		292	my ($pl) = @_;
		293	...
		294	},
		295	);
		296
		297	Example, attach to the jeweler skill:
		298
		299	cf::object->attach (
		300	type => cf::SKILL,
		301	subtype => cf::SK_JEWELER,
		302	on_use_skill => sub {
		303	my ($sk, $ob, $part, $dir, $msg) = @_;
		304	...
		305	},
		306	);
		307
		308	=item cf::CLASS::attachment $name, ...
		309
		310	Register an attachment by C<$name> through which attachable objects of the
		311	given CLASS can refer to this attachment.
		312
		313	Some classes such as crossfire maps and objects can specify attachments
		314	that are attached at load/instantiate time, thus the need for a name.
		315
		316	These calls expect any number of the following handler/hook descriptions:
		317
		318	=over 4
		319
		320	=item prio => $number
		321
		322	Set the priority for all following handlers/hooks (unless overwritten
		323	by another C<prio> setting). Lower priority handlers get executed
		324	earlier. The default priority is C<0>, and many built-in handlers are
		325	registered at priority C<-1000>, so lower priorities should not be used
		326	unless you know what you are doing.
		327
		328	=item type => $type
		329
		330	(Only for C<< cf::object->attach >> calls), limits the attachment to the
		331	given type of objects only (the additional parameter C<subtype> can be
		332	used to further limit to the given subtype).
		333
		334	=item on_I<event> => \&cb
		335
		336	Call the given code reference whenever the named event happens (event is
		337	something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
		338	handlers are recognised generally depends on the type of object these
		339	handlers attach to).
		340
		341	See F<include/eventinc.h> for the full list of events supported, and their
		342	class.
		343
		344	=item package => package::
		345
		346	Look for sub functions of the name C<< on_I<event> >> in the given
		347	package and register them. Only handlers for eevents supported by the
		348	object/class are recognised.
		349
		350	=back
		351
		352	Example, define an attachment called "sockpuppet" that calls the given
		353	event handler when a monster attacks:
		354
		355	cf::object::attachment sockpuppet =>
		356	on_skill_attack => sub {
		357	my ($self, $victim) = @_;
		358	...
		359	}
		360	}
		361
		362	=item $attachable->valid
		363
		364	Just because you have a perl object does not mean that the corresponding
		365	C-level object still exists. If you try to access an object that has no
		366	valid C counterpart anymore you get an exception at runtime. This method
		367	can be used to test for existence of the C object part without causing an
		368	exception.
		369
		370	=cut
		371
		372	# the following variables are defined in .xs and must not be re-created
		373	our @CB_GLOBAL = (); # registry for all global events
		374	our @CB_ATTACHABLE = (); # registry for all attachables
		375	our @CB_OBJECT = (); # all objects (should not be used except in emergency)
		376	our @CB_PLAYER = ();
		377	our @CB_CLIENT = ();
		378	our @CB_TYPE = (); # registry for type (cf-object class) based events
		379	our @CB_MAP = ();
		380
		381	my %attachment;
		382
		383	sub _attach_cb($$$$) {
		384	my ($registry, $event, $prio, $cb) = @_;
		385
		386	use sort 'stable';
		387
		388	$cb = [$prio, $cb];
		389
		390	@{$registry->[$event]} = sort
		391	{ $a->[0] cmp $b->[0] }
		392	@{$registry->[$event] || []}, $cb;
		393	}
		394
		395	# hack
		396	my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
		397
		398	# attach handles attaching event callbacks
		399	# the only thing the caller has to do is pass the correct
		400	# registry (== where the callback attaches to).
		401	sub _attach {
		402	my ($registry, $klass, @arg) = @_;
		403
		404	my $object_type;
		405	my $prio = 0;
		406	my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
		407
		408	#TODO: get rid of this hack
		409	if ($attachable_klass{$klass}) {
		410	%cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
		411	}
		412
		413	while (@arg) {
		414	my $type = shift @arg;
		415
		416	if ($type eq "prio") {
		417	$prio = shift @arg;
		418
		419	} elsif ($type eq "type") {
		420	$object_type = shift @arg;
		421	$registry = $CB_TYPE[$object_type] ||= [];
		422
		423	} elsif ($type eq "subtype") {
		424	defined $object_type or Carp::croak "subtype specified without type";
		425	my $object_subtype = shift @arg;
		426	$registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
		427
		428	} elsif ($type eq "package") {
		429	my $pkg = shift @arg;
		430
		431	while (my ($name, $id) = each %cb_id) {
		432	if (my $cb = $pkg->can ($name)) {
		433	_attach_cb $registry, $id, $prio, $cb;
		434	}
		435	}
		436
		437	} elsif (exists $cb_id{$type}) {
		438	_attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
		439
		440	} elsif (ref $type) {
		441	warn "attaching objects not supported, ignoring.\n";
		442
		443	} else {
		444	shift @arg;
		445	warn "attach argument '$type' not supported, ignoring.\n";
		446	}
		447	}
		448	}
		449
		450	sub _object_attach {
		451	my ($obj, $name, %arg) = @_;
		452
		453	return if exists $obj->{_attachment}{$name};
		454
		455	if (my $attach = $attachment{$name}) {
		456	my $registry = $obj->registry;
		457
		458	for (@$attach) {
		459	my ($klass, @attach) = @$_;
		460	_attach $registry, $klass, @attach;
		461	}
		462
		463	$obj->{$name} = \%arg;
		464	} else {
		465	warn "object uses attachment '$name' that is not available, postponing.\n";
		466	}
		467
		468	$obj->{_attachment}{$name} = undef;
		469	}
		470
		471	sub cf::attachable::attach {
		472	if (ref $_[0]) {
		473	_object_attach @_;
		474	} else {
		475	_attach shift->_attach_registry, @_;
		476	}
		477	};
		478
		479	# all those should be optimised
		480	sub cf::attachable::detach {
		481	my ($obj, $name) = @_;
		482
		483	if (ref $obj) {
		484	delete $obj->{_attachment}{$name};
		485	reattach ($obj);
		486	} else {
		487	Carp::croak "cannot, currently, detach class attachments";
		488	}
		489	};
		490
		491	sub cf::attachable::attached {
		492	my ($obj, $name) = @_;
		493
		494	exists $obj->{_attachment}{$name}
		495	}
		496
		497	for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
		498	eval "#line " . __LINE__ . " 'cf.pm'
		499	sub cf::\L$klass\E::_attach_registry {
		500	(\\\@CB_$klass, KLASS_$klass)
		501	}
		502
		503	sub cf::\L$klass\E::attachment {
		504	my \$name = shift;
		505
		506	\$attachment{\$name} = [[KLASS_$klass, \@_]];
		507	}
		508	";
		509	die if $@;
		510	}
		511
		512	our $override;
		513	our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
		514
		515	sub override {
		516	$override = 1;
		517	@invoke_results = ();
		518	}
		519
		520	sub do_invoke {
92	my $event_code = shift;	521	my $event = shift;
		522	my $callbacks = shift;
93		523
94	my $cb = $hook[$event_code]{$extension}	524	@invoke_results = ();
		525
		526	local $override;
		527
		528	for (@$callbacks) {
		529	eval { &{$_->[1]} };
		530
		531	if ($@) {
		532	warn "$@";
		533	warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
		534	override;
		535	}
		536
		537	return 1 if $override;
		538	}
		539
		540	0
		541	}
		542
		543	=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
		544
		545	=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
		546
		547	Generate an object-specific event with the given arguments.
		548
		549	This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
		550	removed in future versions), and there is no public API to access override
		551	results (if you must, access C<@cf::invoke_results> directly).
		552
		553	=back
		554
		555	=cut
		556
		557	#############################################################################
		558	# object support
		559
		560	sub reattach {
		561	# basically do the same as instantiate, without calling instantiate
		562	my ($obj) = @_;
		563
		564	my $registry = $obj->registry;
		565
		566	@$registry = ();
		567
		568	delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
		569
		570	for my $name (keys %{ $obj->{_attachment} || {} }) {
		571	if (my $attach = $attachment{$name}) {
		572	for (@$attach) {
		573	my ($klass, @attach) = @$_;
		574	_attach $registry, $klass, @attach;
		575	}
		576	} else {
		577	warn "object uses attachment '$name' that is not available, postponing.\n";
		578	}
		579	}
		580	}
		581
		582	cf::attachable->attach (
		583	prio => -1000000,
		584	on_instantiate => sub {
		585	my ($obj, $data) = @_;
		586
		587	$data = from_json $data;
		588
		589	for (@$data) {
		590	my ($name, $args) = @$_;
		591
		592	$obj->attach ($name, %{$args || {} });
		593	}
		594	},
		595	on_reattach => \&reattach,
		596	on_clone => sub {
		597	my ($src, $dst) = @_;
		598
		599	@{$dst->registry} = @{$src->registry};
		600
		601	%$dst = %$src;
		602
		603	%{$dst->{_attachment}} = %{$src->{_attachment}}
		604	if exists $src->{_attachment};
		605	},
		606	);
		607
		608	sub object_freezer_save {
		609	my ($filename, $rdata, $objs) = @_;
		610
		611	sync_job {
		612	if (length $$rdata) {
		613	warn sprintf "saving %s (%d,%d)\n",
		614	$filename, length $$rdata, scalar @$objs;
		615
		616	if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
		617	chmod SAVE_MODE, $fh;
		618	aio_write $fh, 0, (length $$rdata), $$rdata, 0;
		619	aio_fsync $fh;
		620	close $fh;
		621
		622	if (@$objs) {
		623	if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
		624	chmod SAVE_MODE, $fh;
		625	my $data = Storable::nfreeze { version => 1, objs => $objs };
		626	aio_write $fh, 0, (length $data), $data, 0;
		627	aio_fsync $fh;
		628	close $fh;
		629	aio_rename "$filename.pst~", "$filename.pst";
		630	}
		631	} else {
		632	aio_unlink "$filename.pst";
		633	}
		634
		635	aio_rename "$filename~", $filename;
		636	} else {
		637	warn "FATAL: $filename~: $!\n";
		638	}
		639	} else {
		640	aio_unlink $filename;
		641	aio_unlink "$filename.pst";
		642	}
		643	}
		644	}
		645
		646	sub object_freezer_as_string {
		647	my ($rdata, $objs) = @_;
		648
		649	use Data::Dumper;
		650
		651	$$rdata . Dumper $objs
		652	}
		653
		654	sub object_thawer_load {
		655	my ($filename) = @_;
		656
		657	my ($data, $av);
		658
		659	(aio_load $filename, $data) >= 0
95	or return;	660	or return;
96		661
97	&$cb	662	unless (aio_stat "$filename.pst") {
98	}	663	(aio_load "$filename.pst", $av) >= 0
99
100	sub inject_global_event {
101	my $event = shift;
102
103	my $cb = $hook[$event]
104	or return;	664	or return;
105		665	$av = eval { (Storable::thaw <$av>)->{objs} };
106	List::Util::max map &$_, values %$cb
107	}
108
109	sub inject_command {
110	my ($name, $obj, $params) = @_;
111
112	for my $cmd (@{ $command{$name} }) {
113	$cmd->[1]->($obj, $params);
114	}	666	}
115		667
116	-1	668	return ($data, $av);
117	}	669	}
		670
		671	#############################################################################
		672	# command handling &c
		673
		674	=item cf::register_command $name => \&callback($ob,$args);
		675
		676	Register a callback for execution when the client sends the user command
		677	$name.
		678
		679	=cut
118		680
119	sub register_command {	681	sub register_command {
120	my ($name, $time, $cb) = @_;	682	my ($name, $cb) = @_;
121		683
122	my $caller = caller;	684	my $caller = caller;
123	#warn "registering command '$name/$time' to '$caller'";	685	#warn "registering command '$name/$time' to '$caller'";
124		686
125	push @{ $command{$name} }, [$time, $cb, $caller];	687	push @{ $COMMAND{$name} }, [$caller, $cb];
126	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @{ $command{$name} };
127	}	688	}
		689
		690	=item cf::register_extcmd $name => \&callback($pl,$packet);
		691
		692	Register a callbackf ro execution when the client sends an extcmd packet.
		693
		694	If the callback returns something, it is sent back as if reply was being
		695	called.
		696
		697	=cut
128		698
129	sub register_extcmd {	699	sub register_extcmd {
130	my ($name, $cb) = @_;	700	my ($name, $cb) = @_;
131		701
132	my $caller = caller;	702	my $caller = caller;
133	#warn "registering extcmd '$name' to '$caller'";	703	#warn "registering extcmd '$name' to '$caller'";
134		704
135	$extcmd{$name} = [$cb, $caller];	705	$EXTCMD{$name} = [$cb, $caller];
136	}	706	}
		707
		708	cf::player->attach (
		709	on_command => sub {
		710	my ($pl, $name, $params) = @_;
		711
		712	my $cb = $COMMAND{$name}
		713	or return;
		714
		715	for my $cmd (@$cb) {
		716	$cmd->[1]->($pl->ob, $params);
		717	}
		718
		719	cf::override;
		720	},
		721	on_extcmd => sub {
		722	my ($pl, $buf) = @_;
		723
		724	my $msg = eval { from_json $buf };
		725
		726	if (ref $msg) {
		727	if (my $cb = $EXTCMD{$msg->{msgtype}}) {
		728	if (my %reply = $cb->[0]->($pl, $msg)) {
		729	$pl->ext_reply ($msg->{msgid}, %reply);
		730	}
		731	}
		732	} else {
		733	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
		734	}
		735
		736	cf::override;
		737	},
		738	);
137		739
138	sub register {	740	sub register {
139	my ($base, $pkg) = @_;	741	my ($base, $pkg) = @_;
140		742
141	for my $idx (0 .. $#EVENT) {	743	#TODO
142	if (my $ref = $pkg->can ("on_$EVENT[$idx]")) {
143	#warn "registering $EVENT[$idx] hook to '$pkg'\n";
144	$hook[$idx]{$base} = $ref;
145	}
146	}
147	}	744	}
148		745
149	sub load_extension {	746	sub load_extension {
150	my ($path) = @_;	747	my ($path) = @_;
151		748
152	$path =~ /([^\/\\]+)\.ext$/ or die "$path";	749	$path =~ /([^\/\\]+)\.ext$/ or die "$path";
153	my $base = $1;	750	my $base = $1;
154	my $pkg = $1;	751	my $pkg = $1;
155	$pkg =~ s/[^[:word:]]/_/g;	752	$pkg =~ s/[^[:word:]]/_/g;
156	$pkg = "cf::ext::$pkg";	753	$pkg = "ext::$pkg";
157		754
158	warn "loading '$path' into '$pkg'\n";	755	warn "loading '$path' into '$pkg'\n";
159		756
160	open my $fh, "<:utf8", $path	757	open my $fh, "<:utf8", $path
161	or die "$path: $!";	758	or die "$path: $!";
…		…
165	. "#line 1 \"$path\"\n{\n"	762	. "#line 1 \"$path\"\n{\n"
166	. (do { local $/; <$fh> })	763	. (do { local $/; <$fh> })
167	. "\n};\n1";	764	. "\n};\n1";
168		765
169	eval $source	766	eval $source
170	or die "$path: $@";	767	or die $@ ? "$path: $@\n"
		768	: "extension disabled.\n";
171		769
172	push @exts, $pkg;	770	push @exts, $pkg;
173	$ext_pkg{$base} = $pkg;	771	$ext_pkg{$base} = $pkg;
174		772
175	# no strict 'refs';	773	# no strict 'refs';
…		…
181	sub unload_extension {	779	sub unload_extension {
182	my ($pkg) = @_;	780	my ($pkg) = @_;
183		781
184	warn "removing extension $pkg\n";	782	warn "removing extension $pkg\n";
185		783
186	if (my $cb = $pkg->can ("on_unload")) {
187	$cb->($pkg);
188	}
189
190	# remove hooks	784	# remove hooks
		785	#TODO
191	for my $idx (0 .. $#EVENT) {	786	# for my $idx (0 .. $#PLUGIN_EVENT) {
192	delete $hook[$idx]{$pkg};	787	# delete $hook[$idx]{$pkg};
193	}	788	# }
194		789
195	# remove commands	790	# remove commands
196	for my $name (keys %command) {	791	for my $name (keys %COMMAND) {
197	my @cb = grep $_->[2] ne $pkg, @{ $command{$name} };	792	my @cb = grep $_->[0] ne $pkg, @{ $COMMAND{$name} };
198		793
199	if (@cb) {	794	if (@cb) {
200	$command{$name} = \@cb;	795	$COMMAND{$name} = \@cb;
201	$COMMAND{"$name\000"} = List::Util::max map $_->[0], @cb;
202	} else {	796	} else {
203	delete $command{$name};
204	delete $COMMAND{"$name\000"};	797	delete $COMMAND{$name};
205	}	798	}
206	}	799	}
207		800
208	# remove extcmds	801	# remove extcmds
209	for my $name (grep $extcmd{$_}[1] eq $pkg, keys %extcmd) {	802	for my $name (grep $EXTCMD{$_}[1] eq $pkg, keys %EXTCMD) {
210	delete $extcmd{$name};	803	delete $EXTCMD{$name};
		804	}
		805
		806	if (my $cb = $pkg->can ("unload")) {
		807	eval {
		808	$cb->($pkg);
		809	1
		810	} or warn "$pkg unloaded, but with errors: $@";
211	}	811	}
212		812
213	Symbol::delete_package $pkg;	813	Symbol::delete_package $pkg;
214	}	814	}
215		815
216	sub load_extensions {	816	sub load_extensions {
217	my $LIBDIR = maps_directory "perl";
218
219	for my $ext (<$LIBDIR/*.ext>) {	817	for my $ext (<$LIBDIR/*.ext>) {
220	next unless -r $ext;	818	next unless -r $ext;
221	eval {	819	eval {
222	load_extension $ext;	820	load_extension $ext;
223	1	821	1
224	} or warn "$ext not loaded: $@";	822	} or warn "$ext not loaded: $@";
225	}	823	}
226	}	824	}
227		825
228	register_command "perl-reload", 0, sub {
229	my ($who, $arg) = @_;
230
231	if ($who->flag (FLAG_WIZ)) {
232	$who->message ("reloading...");
233
234	warn "reloading...\n";
235	eval {
236	# 1. cancel all watchers
237	$_->cancel for Event::all_watchers;
238
239	# 2. unload all extensions
240	for (@exts) {
241	$who->message ("unloading <$_>");
242	unload_extension $_;
243	}
244
245	# 3. unload all modules loaded from $LIBDIR
246	while (my ($k, $v) = each %INC) {
247	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
248
249	$who->message ("removing <$k>");
250	delete $INC{$k};
251
252	$k =~ s/\.pm$//;
253	$k =~ s/\//::/g;
254
255	if (my $cb = $k->can ("unload_module")) {
256	$cb->();
257	}
258
259	Symbol::delete_package $k;
260	}
261
262	# 4. get rid of ext::, as good as possible
263	Symbol::delete_package "ext::$_"
264	for qw(cf::object cf::object::map cf::object::player cf::player cf::map cf::party cf::region);
265
266	# 5. remove register_script_function callbacks
267	# TODO
268
269	# 6. unload cf.pm "a bit"
270	delete $INC{"cf.pm"};
271
272	# don't, removes xs symbols, too
273	#Symbol::delete_package __PACKAGE__;
274
275	# 7. reload cf.pm
276	$who->message ("reloading cf.pm");
277	require cf;
278	};
279	warn $@ if $@;
280	$who->message ($@) if $@;
281	warn "reloaded\n";
282
283	$who->message ("reloaded");
284	} else {
285	$who->message ("Intruder Alert!");
286	}
287	};
288
289	#############################################################################
290	# utility functions
291
292	use JSON::Syck (); # TODO# replace by JSON::PC once working
293
294	$JSON::Syck::ImplicitUnicode = 1;
295
296	sub from_json($) {
297	JSON::Syck::Load $_[0]
298	}
299
300	sub to_json($) {
301	JSON::Syck::Dump $_[0]
302	}
303
304	#############################################################################
305	# extcmd framework, basically convert ext <msg>
306	# into pkg::->on_extcmd_arg1 (...) while shortcutting a few
307
308	sub on_extcmd {
309	my ($pl, $buf) = @_;
310
311	my $msg = eval { from_json $buf };
312
313	if (ref $msg) {
314	if (my $cb = $extcmd{$msg->{msgtype}}) {
315	if (my %reply = $cb->[0]->($pl, $msg)) {
316	$pl->ext_reply ($msg->{msgid}, %reply);
317	}
318	}
319	} else {
320	warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
321	}
322
323	1
324	}
325
326	#############################################################################	826	#############################################################################
327	# load/save/clean perl data associated with a map	827	# load/save/clean perl data associated with a map
328		828
329	*on_mapclean = sub {	829	*cf::mapsupport::on_clean = sub {
330	my ($map) = @_;	830	my ($map) = @_;
331		831
332	my $path = $map->tmpname;	832	my $path = $map->tmpname;
333	defined $path or return;	833	defined $path or return;
334		834
335	unlink "$path.cfperl";	835	unlink "$path.pst";
336	};	836	};
337		837
338	*on_mapin =	838	cf::map->attach (prio => -10000, package => cf::mapsupport::);
339	*on_mapload = sub {
340	my ($map) = @_;
341
342	my $path = $map->tmpname;
343	$path = $map->path unless defined $path;
344
345	open my $fh, "<:raw", "$path.cfperl"
346	or return; # no perl data
347
348	my $data = Storable::thaw do { local $/; <$fh> };
349
350	$data->{version} <= 1
351	or return; # too new
352
353	$map->_set_obs ($data->{obs});
354	};
355
356	*on_mapout = sub {
357	my ($map) = @_;
358
359	my $path = $map->tmpname;
360	$path = $map->path unless defined $path;
361
362	my $obs = $map->_get_obs;
363
364	if (defined $obs) {
365	open my $fh, ">:raw", "$path.cfperl"
366	or die "$path.cfperl: $!";
367
368	stat $path;
369
370	print $fh Storable::nfreeze {
371	size => (stat _)[7],
372	time => (stat _)[9],
373	version => 1,
374	obs => $obs,
375	};
376
377	chmod SAVE_MODE, "$path.cfperl"; # very racy, but cf-compatible *g*
378	} else {
379	unlink "$path.cfperl";
380	}
381	};
382		839
383	#############################################################################	840	#############################################################################
384	# load/save perl data associated with player->ob objects	841	# load/save perl data associated with player->ob objects
385		842
386	*on_player_load = sub {	843	sub all_objects(@) {
		844	@_, map all_objects ($_->inv), @_
		845	}
		846
		847	# TODO: compatibility cruft, remove when no longer needed
		848	cf::player->attach (
		849	on_load => sub {
387	my ($ob, $path) = @_;	850	my ($pl, $path) = @_;
388		851
389	for my $o ($ob, $ob->inv) {	852	for my $o (all_objects $pl->ob) {
390	if (my $value = $o->get_ob_key_value ("_perl_data")) {	853	if (my $value = $o->get_ob_key_value ("_perl_data")) {
391	$o->set_ob_key_value ("_perl_data");	854	$o->set_ob_key_value ("_perl_data");
392		855
393	%$o = %{ Storable::thaw pack "H*", $value };	856	%$o = %{ Storable::thaw pack "H*", $value };
394	}	857	}
		858	}
395	}	859	},
396	};	860	);
397
398	*on_player_save = sub {
399	my ($ob, $path) = @_;
400
401	$_->set_ob_key_value (_perl_data => unpack "H*", Storable::nfreeze $_)
402	for grep %$_, $ob, $ob->inv;
403	};
404		861
405	#############################################################################	862	#############################################################################
406	# core extensions - in perl	863
		864	=head2 CORE EXTENSIONS
		865
		866	Functions and methods that extend core crossfire objects.
		867
		868	=head3 cf::player
		869
		870	=over 4
407		871
408	=item cf::player::exists $login	872	=item cf::player::exists $login
409		873
410	Returns true when the given account exists.	874	Returns true when the given account exists.
411		875
…		…
414	sub cf::player::exists($) {	878	sub cf::player::exists($) {
415	cf::player::find $_[0]	879	cf::player::find $_[0]
416	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;	880	or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
417	}	881	}
418		882
		883	=item $player->ext_reply ($msgid, $msgtype, %msg)
		884
		885	Sends an ext reply to the player.
		886
		887	=cut
		888
		889	sub cf::player::ext_reply($$$%) {
		890	my ($self, $id, %msg) = @_;
		891
		892	$msg{msgid} = $id;
		893
		894	$self->send ("ext " . to_json \%msg);
		895	}
		896
		897	=back
		898
		899	=head3 cf::object::player
		900
		901	=over 4
		902
419	=item $player->reply ($npc, $msg[, $flags])	903	=item $player_object->reply ($npc, $msg[, $flags])
420		904
421	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>	905	Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
422	can be C<undef>. Does the right thing when the player is currently in a	906	can be C<undef>. Does the right thing when the player is currently in a
423	dialogue with the given NPC character.	907	dialogue with the given NPC character.
424		908
425	=cut	909	=cut
426		910
427	# rough implementation of a future "reply" method that works	911	# rough implementation of a future "reply" method that works
428	# with dialog boxes.	912	# with dialog boxes.
		913	#TODO: the first argument must go, split into a $npc->reply_to ( method
429	sub cf::object::player::reply($$$;$) {	914	sub cf::object::player::reply($$$;$) {
430	my ($self, $npc, $msg, $flags) = @_;	915	my ($self, $npc, $msg, $flags) = @_;
431		916
432	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;	917	$flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
433		918
…		…
437	$msg = $npc->name . " says: $msg" if $npc;	922	$msg = $npc->name . " says: $msg" if $npc;
438	$self->message ($msg, $flags);	923	$self->message ($msg, $flags);
439	}	924	}
440	}	925	}
441		926
442	=item $player->ext_reply ($msgid, $msgtype, %msg)	927	=item $player_object->may ("access")
443		928
444	Sends an ext reply to the player.	929	Returns wether the given player is authorized to access resource "access"
		930	(e.g. "command_wizcast").
445		931
446	=cut	932	=cut
447		933
448	sub cf::player::ext_reply($$$%) {	934	sub cf::object::player::may {
		935	my ($self, $access) = @_;
		936
		937	$self->flag (cf::FLAG_WIZ) ||
		938	(ref $cf::CFG{"may_$access"}
		939	? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
		940	: $cf::CFG{"may_$access"})
		941	}
		942
		943	=head3 cf::client
		944
		945	=over 4
		946
		947	=item $client->send_drawinfo ($text, $flags)
		948
		949	Sends a drawinfo packet to the client. Circumvents output buffering so
		950	should not be used under normal circumstances.
		951
		952	=cut
		953
		954	sub cf::client::send_drawinfo {
		955	my ($self, $text, $flags) = @_;
		956
		957	utf8::encode $text;
		958	$self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
		959	}
		960
		961
		962	=item $success = $client->query ($flags, "text", \&cb)
		963
		964	Queues a query to the client, calling the given callback with
		965	the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
		966	C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
		967
		968	Queries can fail, so check the return code. Or don't, as queries will become
		969	reliable at some point in the future.
		970
		971	=cut
		972
		973	sub cf::client::query {
		974	my ($self, $flags, $text, $cb) = @_;
		975
		976	return unless $self->state == ST_PLAYING
		977	|| $self->state == ST_SETUP
		978	|| $self->state == ST_CUSTOM;
		979
		980	$self->state (ST_CUSTOM);
		981
		982	utf8::encode $text;
		983	push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
		984
		985	$self->send_packet ($self->{query_queue}[0][0])
		986	if @{ $self->{query_queue} } == 1;
		987	}
		988
		989	cf::client->attach (
		990	on_reply => sub {
		991	my ($ns, $msg) = @_;
		992
		993	# this weird shuffling is so that direct followup queries
		994	# get handled first
		995	my $queue = delete $ns->{query_queue};
		996
		997	(shift @$queue)->[1]->($msg);
		998
		999	push @{ $ns->{query_queue} }, @$queue;
		1000
		1001	if (@{ $ns->{query_queue} } == @$queue) {
		1002	if (@$queue) {
		1003	$ns->send_packet ($ns->{query_queue}[0][0]);
		1004	} else {
		1005	$ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
		1006	}
		1007	}
		1008	},
		1009	);
		1010
		1011	=item $client->coro (\&cb)
		1012
		1013	Create a new coroutine, running the specified callback. The coroutine will
		1014	be automatically cancelled when the client gets destroyed (e.g. on logout,
		1015	or loss of connection).
		1016
		1017	=cut
		1018
		1019	sub cf::client::coro {
449	my ($self, $id, %msg) = @_;	1020	my ($self, $cb) = @_;
450		1021
451	$msg{msgid} = $id;	1022	my $coro; $coro = async {
		1023	eval {
		1024	$cb->();
		1025	};
		1026	warn $@ if $@;
		1027	};
452		1028
453	$self->send ("ext " . to_json \%msg);	1029	$coro->on_destroy (sub {
454	}	1030	delete $self->{_coro}{$coro+0};
		1031	});
455		1032
456	#############################################################################	1033	$self->{_coro}{$coro+0} = $coro;
457	# map scripting support
458		1034
		1035	$coro
		1036	}
		1037
		1038	cf::client->attach (
		1039	on_destroy => sub {
		1040	my ($ns) = @_;
		1041
		1042	$_->cancel for values %{ (delete $ns->{_coro}) || {} };
		1043	},
		1044	);
		1045
		1046	=back
		1047
		1048
		1049	=head2 SAFE SCRIPTING
		1050
		1051	Functions that provide a safe environment to compile and execute
		1052	snippets of perl code without them endangering the safety of the server
		1053	itself. Looping constructs, I/O operators and other built-in functionality
		1054	is not available in the safe scripting environment, and the number of
		1055	functions and methods that can be called is greatly reduced.
		1056
		1057	=cut
		1058
459	our $safe = new Safe "ext";	1059	our $safe = new Safe "safe";
460	our $safe_hole = new Safe::Hole;	1060	our $safe_hole = new Safe::Hole;
461		1061
462	$SIG{FPE} = 'IGNORE';	1062	$SIG{FPE} = 'IGNORE';
463		1063
464	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));	1064	$safe->permit_only (Opcode::opset qw(:base_core :base_mem :base_orig :base_math sort time));
465		1065
466	# here we export the classes and methods available to script code	1066	# here we export the classes and methods available to script code
467		1067
		1068	=pod
		1069
		1070	The following fucntions and emthods are available within a safe environment:
		1071
		1072	cf::object contr pay_amount pay_player map
		1073	cf::object::player player
		1074	cf::player peaceful
		1075	cf::map trigger
		1076
		1077	=cut
		1078
468	for (	1079	for (
469	["cf::object" => qw(contr pay_amount pay_player)],	1080	["cf::object" => qw(contr pay_amount pay_player map)],
470	["cf::object::player" => qw(player)],	1081	["cf::object::player" => qw(player)],
471	["cf::player" => qw(peaceful)],	1082	["cf::player" => qw(peaceful)],
		1083	["cf::map" => qw(trigger)],
472	) {	1084	) {
473	no strict 'refs';	1085	no strict 'refs';
474	my ($pkg, @funs) = @$_;	1086	my ($pkg, @funs) = @$_;
475	*{"ext::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})	1087	*{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
476	for @funs;	1088	for @funs;
477	}	1089	}
		1090
		1091	=over 4
		1092
		1093	=item @retval = safe_eval $code, [var => value, ...]
		1094
		1095	Compiled and executes the given perl code snippet. additional var/value
		1096	pairs result in temporary local (my) scalar variables of the given name
		1097	that are available in the code snippet. Example:
		1098
		1099	my $five = safe_eval '$first + $second', first => 1, second => 4;
		1100
		1101	=cut
478		1102
479	sub safe_eval($;@) {	1103	sub safe_eval($;@) {
480	my ($code, %vars) = @_;	1104	my ($code, %vars) = @_;
481		1105
482	my $qcode = $code;	1106	my $qcode = $code;
483	$qcode =~ s/"/‟/g; # not allowed in #line filenames	1107	$qcode =~ s/"/‟/g; # not allowed in #line filenames
484	$qcode =~ s/\n/\\n/g;	1108	$qcode =~ s/\n/\\n/g;
485		1109
486	local $_;	1110	local $_;
487	local @ext::cf::_safe_eval_args = values %vars;	1111	local @safe::cf::_safe_eval_args = values %vars;
488		1112
489	$code =	1113	my $eval =
490	"do {\n"	1114	"do {\n"
491	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"	1115	. "my (" . (join ",", map "\$$_", keys %vars) . ") = \@cf::_safe_eval_args;\n"
492	. "#line 0 \"{$qcode}\"\n"	1116	. "#line 0 \"{$qcode}\"\n"
493	. $code	1117	. $code
494	. "\n}"	1118	. "\n}"
495	;	1119	;
496		1120
497	sub_generation_inc;	1121	sub_generation_inc;
498	my @res = wantarray ? $safe->reval ($code) : scalar $safe->reval ($code);	1122	my @res = wantarray ? $safe->reval ($eval) : scalar $safe->reval ($eval);
499	sub_generation_inc;	1123	sub_generation_inc;
500		1124
		1125	if ($@) {
		1126	warn "$@";
		1127	warn "while executing safe code '$code'\n";
		1128	warn "with arguments " . (join " ", %vars) . "\n";
		1129	}
		1130
501	wantarray ? @res : $res[0]	1131	wantarray ? @res : $res[0]
502	}	1132	}
		1133
		1134	=item cf::register_script_function $function => $cb
		1135
		1136	Register a function that can be called from within map/npc scripts. The
		1137	function should be reasonably secure and should be put into a package name
		1138	like the extension.
		1139
		1140	Example: register a function that gets called whenever a map script calls
		1141	C<rent::overview>, as used by the C<rent> extension.
		1142
		1143	cf::register_script_function "rent::overview" => sub {
		1144	...
		1145	};
		1146
		1147	=cut
503		1148
504	sub register_script_function {	1149	sub register_script_function {
505	my ($fun, $cb) = @_;	1150	my ($fun, $cb) = @_;
506		1151
507	no strict 'refs';	1152	no strict 'refs';
508	*{"ext::$fun"} = $safe_hole->wrap ($cb);	1153	*{"safe::$fun"} = $safe_hole->wrap ($cb);
		1154	}
		1155
		1156	=back
		1157
		1158	=cut
		1159
		1160	#############################################################################
		1161
		1162	=head2 EXTENSION DATABASE SUPPORT
		1163
		1164	Crossfire maintains a very simple database for extension use. It can
		1165	currently store anything that can be serialised using Storable, which
		1166	excludes objects.
		1167
		1168	The parameter C<$family> should best start with the name of the extension
		1169	using it, it should be unique.
		1170
		1171	=over 4
		1172
		1173	=item $hashref = cf::db_get $family
		1174
		1175	Return a hashref for use by the extension C<$family>, which can be
		1176	modified. After modifications, you have to call C<cf::db_dirty> or
		1177	C<cf::db_sync>.
		1178
		1179	=item $value = cf::db_get $family => $key
		1180
		1181	Returns a single value from the database
		1182
		1183	=item cf::db_put $family => $hashref
		1184
		1185	Stores the given family hashref into the database. Updates are delayed, if
		1186	you want the data to be synced to disk immediately, use C<cf::db_sync>.
		1187
		1188	=item cf::db_put $family => $key => $value
		1189
		1190	Stores the given C<$value> in the family hash. Updates are delayed, if you
		1191	want the data to be synced to disk immediately, use C<cf::db_sync>.
		1192
		1193	=item cf::db_dirty
		1194
		1195	Marks the database as dirty, to be updated at a later time.
		1196
		1197	=item cf::db_sync
		1198
		1199	Immediately write the database to disk I<if it is dirty>.
		1200
		1201	=cut
		1202
		1203	our $DB;
		1204
		1205	{
		1206	my $path = cf::localdir . "/database.pst";
		1207
		1208	sub db_load() {
		1209	warn "loading database $path\n";#d# remove later
		1210	$DB = stat $path ? Storable::retrieve $path : { };
		1211	}
		1212
		1213	my $pid;
		1214
		1215	sub db_save() {
		1216	warn "saving database $path\n";#d# remove later
		1217	waitpid $pid, 0 if $pid;
		1218	if (0 == ($pid = fork)) {
		1219	$DB->{_meta}{version} = 1;
		1220	Storable::nstore $DB, "$path~";
		1221	rename "$path~", $path;
		1222	cf::_exit 0 if defined $pid;
		1223	}
		1224	}
		1225
		1226	my $dirty;
		1227
		1228	sub db_sync() {
		1229	db_save if $dirty;
		1230	undef $dirty;
		1231	}
		1232
		1233	my $idle = Event->idle (min => $TICK * 2.8, max => 10, repeat => 0, data => WF_AUTOCANCEL, cb => sub {
		1234	db_sync;
		1235	});
		1236
		1237	sub db_dirty() {
		1238	$dirty = 1;
		1239	$idle->start;
		1240	}
		1241
		1242	sub db_get($;$) {
		1243	@_ >= 2
		1244	? $DB->{$_[0]}{$_[1]}
		1245	: ($DB->{$_[0]} ||= { })
		1246	}
		1247
		1248	sub db_put($$;$) {
		1249	if (@_ >= 3) {
		1250	$DB->{$_[0]}{$_[1]} = $_[2];
		1251	} else {
		1252	$DB->{$_[0]} = $_[1];
		1253	}
		1254	db_dirty;
		1255	}
		1256
		1257	cf::global->attach (
		1258	prio => 10000,
		1259	on_cleanup => sub {
		1260	db_sync;
		1261	},
		1262	);
		1263	}
		1264
		1265	#############################################################################
		1266	# the server's main()
		1267
		1268	sub cfg_load {
		1269	open my $fh, "<:utf8", cf::confdir . "/config"
		1270	or return;
		1271
		1272	local $/;
		1273	*CFG = YAML::Syck::Load <$fh>;
		1274	}
		1275
		1276	sub main {
		1277	cfg_load;
		1278	db_load;
		1279	load_extensions;
		1280	Event::loop;
509	}	1281	}
510		1282
511	#############################################################################	1283	#############################################################################
512	# initialisation	1284	# initialisation
513		1285
		1286	sub _perl_reload() {
		1287	# can/must only be called in main
		1288	if ($Coro::current != $Coro::main) {
		1289	warn "can only reload from main coroutine\n";
		1290	return;
		1291	}
		1292
		1293	warn "reloading...";
		1294
		1295	local $FREEZE = 1;
		1296	cf::emergency_save;
		1297
		1298	eval {
		1299	# if anything goes wrong in here, we should simply crash as we already saved
		1300
		1301	# cancel all watchers
		1302	for (Event::all_watchers) {
		1303	$_->cancel if $_->data & WF_AUTOCANCEL;
		1304	}
		1305
		1306	# cancel all extension coros
		1307	$_->cancel for values %EXT_CORO;
		1308	%EXT_CORO = ();
		1309
		1310	# unload all extensions
		1311	for (@exts) {
		1312	warn "unloading <$_>";
		1313	unload_extension $_;
		1314	}
		1315
		1316	# unload all modules loaded from $LIBDIR
		1317	while (my ($k, $v) = each %INC) {
		1318	next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
		1319
		1320	warn "removing <$k>";
		1321	delete $INC{$k};
		1322
		1323	$k =~ s/\.pm$//;
		1324	$k =~ s/\//::/g;
		1325
		1326	if (my $cb = $k->can ("unload_module")) {
		1327	$cb->();
		1328	}
		1329
		1330	Symbol::delete_package $k;
		1331	}
		1332
		1333	# sync database to disk
		1334	cf::db_sync;
		1335	IO::AIO::flush;
		1336
		1337	# get rid of safe::, as good as possible
		1338	Symbol::delete_package "safe::$_"
		1339	for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
		1340
		1341	# remove register_script_function callbacks
		1342	# TODO
		1343
		1344	# unload cf.pm "a bit"
		1345	delete $INC{"cf.pm"};
		1346
		1347	# don't, removes xs symbols, too,
		1348	# and global variables created in xs
		1349	#Symbol::delete_package __PACKAGE__;
		1350
		1351	# reload cf.pm
		1352	warn "reloading cf.pm";
		1353	require cf;
		1354	cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
		1355
		1356	# load config and database again
		1357	cf::cfg_load;
		1358	cf::db_load;
		1359
		1360	# load extensions
		1361	warn "load extensions";
		1362	cf::load_extensions;
		1363
		1364	# reattach attachments to objects
		1365	warn "reattach";
		1366	_global_reattach;
		1367	};
		1368
		1369	if ($@) {
		1370	warn $@;
		1371	warn "error while reloading, exiting.";
		1372	exit 1;
		1373	}
		1374
		1375	warn "reloaded successfully";
		1376	};
		1377
		1378	sub perl_reload() {
		1379	_perl_reload;
		1380	}
		1381
514	register "<global>", __PACKAGE__;	1382	register "<global>", __PACKAGE__;
515		1383
		1384	register_command "perl-reload" => sub {
		1385	my ($who, $arg) = @_;
		1386
		1387	if ($who->flag (FLAG_WIZ)) {
		1388	$who->message ("reloading...");
		1389	_perl_reload;
		1390	}
		1391	};
		1392
516	unshift @INC, $LIBDIR;	1393	unshift @INC, $LIBDIR;
517		1394
518	load_extensions;	1395	$TICK_WATCHER = Event->timer (
		1396	reentrant => 0,
		1397	prio => 0,
		1398	at => $NEXT_TICK || $TICK,
		1399	data => WF_AUTOCANCEL,
		1400	cb => sub {
		1401	unless ($FREEZE) {
		1402	cf::server_tick; # one server iteration
		1403	$RUNTIME += $TICK;
		1404	}
		1405
		1406	$NEXT_TICK += $TICK;
		1407
		1408	# if we are delayed by four ticks or more, skip them all
		1409	$NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
		1410
		1411	$TICK_WATCHER->at ($NEXT_TICK);
		1412	$TICK_WATCHER->start;
		1413	},
		1414	);
		1415
		1416	IO::AIO::max_poll_time $TICK * 0.2;
		1417
		1418	Event->io (fd => IO::AIO::poll_fileno,
		1419	poll => 'r',
		1420	prio => 5,
		1421	data => WF_AUTOCANCEL,
		1422	cb => \&IO::AIO::poll_cb);
		1423
		1424	# we must not ever block the main coroutine
		1425	$Coro::idle = sub {
		1426	#Carp::cluck "FATAL: Coro::idle was called, major BUG\n";#d#
		1427	warn "FATAL: Coro::idle was called, major BUG\n";
		1428	(Coro::unblock_sub {
		1429	Event::one_event;
		1430	})->();
		1431	};
519		1432
520	1	1433	1
521		1434

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