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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.88 by root, Fri Dec 15 19:29:18 2006 UTC vs.
Revision 1.105 by root, Sun Dec 31 17:17:23 2006 UTC

1package cf; 1package cf;
2
3use utf8;
4use strict;
2 5
3use Symbol; 6use Symbol;
4use List::Util; 7use List::Util;
5use Storable; 8use Storable;
6use Opcode; 9use Opcode;
7use Safe; 10use Safe;
8use Safe::Hole; 11use Safe::Hole;
9 12
13use Coro 3.3;
14use Coro::Event;
15use Coro::Timer;
16use Coro::Signal;
17use Coro::Semaphore;
18use Coro::AIO;
19
20use Fcntl;
10use IO::AIO (); 21use IO::AIO 2.31 ();
11use YAML::Syck (); 22use YAML::Syck ();
12use Time::HiRes; 23use Time::HiRes;
13use Event; 24
14$Event::Eval = 1; # no idea why this is required, but it is 25use Event; $Event::Eval = 1; # no idea why this is required, but it is
15 26
16# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode? 27# work around bug in YAML::Syck - bad news for perl6, will it be as broken wrt. unicode?
17$YAML::Syck::ImplicitUnicode = 1; 28$YAML::Syck::ImplicitUnicode = 1;
18 29
19use strict; 30$Coro::main->prio (2); # run main coroutine ("the server") with very high priority
20 31
21sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload 32sub WF_AUTOCANCEL () { 1 } # automatically cancel this watcher on reload
22 33
23our %COMMAND = (); 34our %COMMAND = ();
24our %COMMAND_TIME = (); 35our %COMMAND_TIME = ();
25our %EXTCMD = (); 36our %EXTCMD = ();
26 37
27_init_vars;
28
29our @EVENT; 38our @EVENT;
30our $LIBDIR = datadir . "/ext"; 39our $LIBDIR = datadir . "/ext";
31 40
32our $TICK = MAX_TIME * 1e-6; 41our $TICK = MAX_TIME * 1e-6;
33our $TICK_WATCHER; 42our $TICK_WATCHER;
34our $NEXT_TICK; 43our $NEXT_TICK;
44our $NOW;
35 45
36our %CFG; 46our %CFG;
37 47
38our $UPTIME; $UPTIME ||= time; 48our $UPTIME; $UPTIME ||= time;
49our $RUNTIME;
50
51our %MAP; # all maps
52our $LINK_MAP; # the special {link} map
53our $FREEZE;
54
55binmode STDOUT;
56binmode STDERR;
57
58# read virtual server time, if available
59unless ($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
65mkdir cf::localdir;
66mkdir cf::localdir . "/" . cf::playerdir;
67mkdir cf::localdir . "/" . cf::tmpdir;
68mkdir cf::localdir . "/" . cf::uniquedir;
69
70our %EXT_CORO;
39 71
40############################################################################# 72#############################################################################
41 73
42=head2 GLOBAL VARIABLES 74=head2 GLOBAL VARIABLES
43 75
44=over 4 76=over 4
45 77
46=item $cf::UPTIME 78=item $cf::UPTIME
47 79
48The timestamp of the server start (so not actually an uptime). 80The timestamp of the server start (so not actually an uptime).
81
82=item $cf::RUNTIME
83
84The time this server has run, starts at 0 and is increased by $cf::TICK on
85every server tick.
49 86
50=item $cf::LIBDIR 87=item $cf::LIBDIR
51 88
52The perl library directory, where extensions and cf-specific modules can 89The perl library directory, where extensions and cf-specific modules can
53be found. It will be added to C<@INC> automatically. 90be found. It will be added to C<@INC> automatically.
91
92=item $cf::NOW
93
94The time of the last (current) server tick.
54 95
55=item $cf::TICK 96=item $cf::TICK
56 97
57The interval between server ticks, in seconds. 98The interval between server ticks, in seconds.
58 99
66=cut 107=cut
67 108
68BEGIN { 109BEGIN {
69 *CORE::GLOBAL::warn = sub { 110 *CORE::GLOBAL::warn = sub {
70 my $msg = join "", @_; 111 my $msg = join "", @_;
112 utf8::encode $msg;
113
71 $msg .= "\n" 114 $msg .= "\n"
72 unless $msg =~ /\n$/; 115 unless $msg =~ /\n$/;
73 116
74 print STDERR "cfperl: $msg";
75 LOG llevError, "cfperl: $msg"; 117 LOG llevError, "cfperl: $msg";
76 }; 118 };
77} 119}
78 120
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';
79@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object'; 126@safe::cf::object::player::ISA = @cf::object::player::ISA = 'cf::object';
80 127
81# we bless all objects into (empty) derived classes to force a method lookup 128# we bless all objects into (empty) derived classes to force a method lookup
82# within the Safe compartment. 129# within the Safe compartment.
83for my $pkg (qw( 130for my $pkg (qw(
131 cf::global cf::attachable
84 cf::object cf::object::player 132 cf::object cf::object::player
85 cf::client_socket cf::player 133 cf::client cf::player
86 cf::arch cf::living 134 cf::arch cf::living
87 cf::map cf::party cf::region 135 cf::map cf::party cf::region
88)) { 136)) {
89 no strict 'refs'; 137 no strict 'refs';
90 @{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg; 138 @{"safe::$pkg\::wrap::ISA"} = @{"$pkg\::wrap::ISA"} = $pkg;
126sub to_json($) { 174sub to_json($) {
127 $JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs 175 $JSON::Syck::ImplicitUnicode = 0; # work around JSON::Syck bugs
128 JSON::Syck::Dump $_[0] 176 JSON::Syck::Dump $_[0]
129} 177}
130 178
179# main coro must never ever "block" except in Event
180# sync_job ensures this by running the job in a coroutine
181# and waiting in Event while the server is otherwise frozen
182sub sync_job(&) {
183 my ($job) = @_;
184
185 my $busy = 1;
186 my @res;
187
188 local $FREEZE = 1;
189
190 my $coro = Coro::async {
191 @res = eval { $job->() };
192 warn $@ if $@;
193 undef $busy;
194 };
195
196 if ($Coro::current == $Coro::main) {
197 $coro->prio (Coro::PRIO_MAX);
198 while ($busy) {
199 Coro::cede_notself;
200 Event::one_event unless Coro::nready;
201 }
202 } else {
203 $coro->join;
204 }
205
206 wantarray ? @res : $res[0]
207}
208
209=item $coro = cf::coro { BLOCK }
210
211Creates and returns a new coro. This coro is automcatially being canceled
212when the extension calling this is being unloaded.
213
214=cut
215
216sub coro(&) {
217 my $cb = shift;
218
219 my $coro; $coro = async {
220 eval {
221 $cb->();
222 };
223 warn $@ if $@;
224 };
225
226 $coro->on_destroy (sub {
227 delete $EXT_CORO{$coro+0};
228 });
229 $EXT_CORO{$coro+0} = $coro;
230
231 $coro
232}
233
131=back 234=back
132 235
133=cut 236=cut
134 237
135############################################################################# 238#############################################################################
136 239
137=head2 EVENTS AND OBJECT ATTACHMENTS 240=head2 ATTACHABLE OBJECTS
241
242Many objects in crossfire are so-called attachable objects. That means you can
243attach callbacks/event handlers (a collection of which is called an "attachment")
244to it. All such attachable objects support the following methods.
245
246In the following description, CLASS can be any of C<global>, C<object>
247C<player>, C<client> or C<map> (i.e. the attachable objects in
248crossfire+).
138 249
139=over 4 250=over 4
140 251
141=item $object->attach ($attachment, key => $value...)
142
143=item $object->detach ($attachment)
144
145Attach/detach a pre-registered attachment to an object.
146
147=item $player->attach ($attachment, key => $value...)
148
149=item $player->detach ($attachment)
150
151Attach/detach a pre-registered attachment to a player.
152
153=item $map->attach ($attachment, key => $value...) 252=item $attachable->attach ($attachment, key => $value...)
154 253
155=item $map->detach ($attachment) 254=item $attachable->detach ($attachment)
156 255
157Attach/detach a pre-registered attachment to a map. 256Attach/detach a pre-registered attachment to a specific object and give it
257the specified key/value pairs as arguments.
158 258
159=item $bool = $object->attached ($name) 259Example, attach a minesweeper attachment to the given object, making it a
26010x10 minesweeper game:
160 261
161=item $bool = $player->attached ($name) 262 $obj->attach (minesweeper => width => 10, height => 10);
162 263
163=item $bool = $map->attached ($name) 264=item $bool = $attachable->attached ($name)
164 265
165Checks wether the named attachment is currently attached to the object. 266Checks wether the named attachment is currently attached to the object.
166 267
167=item cf::attach_global ... 268=item cf::CLASS->attach ...
168 269
169Attach handlers for global events. 270=item cf::CLASS->detach ...
170 271
171This and all following C<attach_*>-functions expect any number of the 272Define an anonymous attachment and attach it to all objects of the given
172following handler/hook descriptions: 273CLASS. See the next function for an explanation of its arguments.
274
275You can attach to global events by using the C<cf::global> class.
276
277Example, log all player logins:
278
279 cf::player->attach (
280 on_login => sub {
281 my ($pl) = @_;
282 ...
283 },
284 );
285
286Example, attach to the jeweler skill:
287
288 cf::object->attach (
289 type => cf::SKILL,
290 subtype => cf::SK_JEWELER,
291 on_use_skill => sub {
292 my ($sk, $ob, $part, $dir, $msg) = @_;
293 ...
294 },
295 );
296
297=item cf::CLASS::attachment $name, ...
298
299Register an attachment by C<$name> through which attachable objects of the
300given CLASS can refer to this attachment.
301
302Some classes such as crossfire maps and objects can specify attachments
303that are attached at load/instantiate time, thus the need for a name.
304
305These calls expect any number of the following handler/hook descriptions:
173 306
174=over 4 307=over 4
175 308
176=item prio => $number 309=item prio => $number
177 310
179by another C<prio> setting). Lower priority handlers get executed 312by another C<prio> setting). Lower priority handlers get executed
180earlier. The default priority is C<0>, and many built-in handlers are 313earlier. The default priority is C<0>, and many built-in handlers are
181registered at priority C<-1000>, so lower priorities should not be used 314registered at priority C<-1000>, so lower priorities should not be used
182unless you know what you are doing. 315unless you know what you are doing.
183 316
317=item type => $type
318
319(Only for C<< cf::object->attach >> calls), limits the attachment to the
320given type of objects only (the additional parameter C<subtype> can be
321used to further limit to the given subtype).
322
184=item on_I<event> => \&cb 323=item on_I<event> => \&cb
185 324
186Call the given code reference whenever the named event happens (event is 325Call the given code reference whenever the named event happens (event is
187something like C<instantiate>, C<apply>, C<use_skill> and so on, and which 326something like C<instantiate>, C<apply>, C<use_skill> and so on, and which
188handlers are recognised generally depends on the type of object these 327handlers are recognised generally depends on the type of object these
197package and register them. Only handlers for eevents supported by the 336package and register them. Only handlers for eevents supported by the
198object/class are recognised. 337object/class are recognised.
199 338
200=back 339=back
201 340
202=item cf::attach_to_type $object_type, $subtype, ... 341Example, define an attachment called "sockpuppet" that calls the given
342event handler when a monster attacks:
203 343
204Attach handlers for a specific object type (e.g. TRANSPORT) and 344 cf::object::attachment sockpuppet =>
205subtype. If C<$subtype> is zero or undef, matches all objects of the given 345 on_skill_attack => sub {
206type. 346 my ($self, $victim) = @_;
207 347 ...
208=item cf::attach_to_objects ...
209
210Attach handlers to all objects. Do not use this except for debugging or
211very rare events, as handlers are (obviously) called for I<all> objects in
212the game.
213
214=item cf::attach_to_players ...
215
216Attach handlers to all players.
217
218=item cf::attach_to_maps ...
219
220Attach handlers to all maps.
221
222=item cf:register_attachment $name, ...
223
224Register an attachment by name through which objects can refer to this
225attachment.
226
227=item cf:register_player_attachment $name, ...
228
229Register an attachment by name through which players can refer to this
230attachment.
231
232=item cf:register_map_attachment $name, ...
233
234Register an attachment by name through which maps can refer to this
235attachment.
236
237=cut
238
239# the following variables are defined in .xs and must not be re-created
240our @CB_GLOBAL = (); # registry for all global events
241our @CB_OBJECT = (); # all objects (should not be used except in emergency)
242our @CB_PLAYER = ();
243our @CB_TYPE = (); # registry for type (cf-object class) based events
244our @CB_MAP = ();
245
246my %attachment;
247
248sub _attach_cb($\%$$$) {
249 my ($registry, $undo, $event, $prio, $cb) = @_;
250
251 use sort 'stable';
252
253 $cb = [$prio, $cb];
254
255 @{$registry->[$event]} = sort
256 { $a->[0] cmp $b->[0] }
257 @{$registry->[$event] || []}, $cb;
258
259 push @{$undo->{cb}}, [$event, $cb];
260}
261
262# attach handles attaching event callbacks
263# the only thing the caller has to do is pass the correct
264# registry (== where the callback attaches to).
265sub _attach(\@$@) {
266 my ($registry, $klass, @arg) = @_;
267
268 my $prio = 0;
269
270 my %undo = (
271 registry => $registry,
272 cb => [],
273 );
274
275 my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
276
277 while (@arg) {
278 my $type = shift @arg;
279
280 if ($type eq "prio") {
281 $prio = shift @arg;
282
283 } elsif ($type eq "package") {
284 my $pkg = shift @arg;
285
286 while (my ($name, $id) = each %cb_id) {
287 if (my $cb = $pkg->can ($name)) {
288 _attach_cb $registry, %undo, $id, $prio, $cb;
289 }
290 } 348 }
291
292 } elsif (exists $cb_id{$type}) {
293 _attach_cb $registry, %undo, $cb_id{$type}, $prio, shift @arg;
294
295 } elsif (ref $type) {
296 warn "attaching objects not supported, ignoring.\n";
297
298 } else {
299 shift @arg;
300 warn "attach argument '$type' not supported, ignoring.\n";
301 }
302 }
303
304 \%undo
305}
306
307sub _attach_attachment {
308 my ($obj, $name, %arg) = @_;
309
310 return if exists $obj->{_attachment}{$name};
311
312 my $res;
313
314 if (my $attach = $attachment{$name}) {
315 my $registry = $obj->registry;
316
317 for (@$attach) {
318 my ($klass, @attach) = @$_;
319 $res = _attach @$registry, $klass, @attach;
320 }
321
322 $obj->{$name} = \%arg;
323 } else {
324 warn "object uses attachment '$name' that is not available, postponing.\n";
325 }
326
327 $obj->{_attachment}{$name} = undef;
328
329 $res->{attachment} = $name;
330 $res
331}
332
333*cf::object::attach =
334*cf::player::attach =
335*cf::map::attach = sub {
336 my ($obj, $name, %arg) = @_;
337
338 _attach_attachment $obj, $name, %arg;
339};
340
341# all those should be optimised
342*cf::object::detach =
343*cf::player::detach =
344*cf::map::detach = sub {
345 my ($obj, $name) = @_;
346
347 delete $obj->{_attachment}{$name};
348 reattach ($obj);
349};
350
351*cf::object::attached =
352*cf::player::attached =
353*cf::map::attached = sub {
354 my ($obj, $name) = @_;
355
356 exists $obj->{_attachment}{$name}
357};
358
359sub attach_global {
360 _attach @CB_GLOBAL, KLASS_GLOBAL, @_
361}
362
363sub attach_to_type {
364 my $type = shift;
365 my $subtype = shift;
366
367 _attach @{$CB_TYPE[$type + $subtype * NUM_SUBTYPES]}, KLASS_OBJECT, @_
368}
369
370sub attach_to_objects {
371 _attach @CB_OBJECT, KLASS_OBJECT, @_
372}
373
374sub attach_to_players {
375 _attach @CB_PLAYER, KLASS_PLAYER, @_
376}
377
378sub attach_to_maps {
379 _attach @CB_MAP, KLASS_MAP, @_
380}
381
382sub register_attachment {
383 my $name = shift;
384
385 $attachment{$name} = [[KLASS_OBJECT, @_]];
386}
387
388sub register_player_attachment {
389 my $name = shift;
390
391 $attachment{$name} = [[KLASS_PLAYER, @_]];
392}
393
394sub register_map_attachment {
395 my $name = shift;
396
397 $attachment{$name} = [[KLASS_MAP, @_]];
398}
399
400our $override;
401our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
402
403sub override {
404 $override = 1;
405 @invoke_results = ();
406}
407
408sub do_invoke {
409 my $event = shift;
410 my $callbacks = shift;
411
412 @invoke_results = ();
413
414 local $override;
415
416 for (@$callbacks) {
417 eval { &{$_->[1]} };
418
419 if ($@) {
420 warn "$@";
421 warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
422 override;
423 }
424
425 return 1 if $override;
426 }
427
428 0 349 }
429}
430 350
431=item $bool = cf::invoke EVENT_GLOBAL_XXX, ... 351=item $attachable->valid
432
433=item $bool = $object->invoke (EVENT_OBJECT_XXX, ...)
434
435=item $bool = $player->invoke (EVENT_PLAYER_XXX, ...)
436
437=item $bool = $map->invoke (EVENT_MAP_XXX, ...)
438
439Generate a global/object/player/map-specific event with the given arguments.
440
441This API is preliminary (most likely, the EVENT_KLASS_xxx prefix will be
442removed in future versions), and there is no public API to access override
443results (if you must, access C<@cf::invoke_results> directly).
444
445=back
446
447=cut
448
449#############################################################################
450
451=head2 METHODS VALID FOR ALL CORE OBJECTS
452
453=over 4
454
455=item $object->valid, $player->valid, $map->valid
456 352
457Just because you have a perl object does not mean that the corresponding 353Just because you have a perl object does not mean that the corresponding
458C-level object still exists. If you try to access an object that has no 354C-level object still exists. If you try to access an object that has no
459valid C counterpart anymore you get an exception at runtime. This method 355valid C counterpart anymore you get an exception at runtime. This method
460can be used to test for existence of the C object part without causing an 356can be used to test for existence of the C object part without causing an
461exception. 357exception.
462 358
359=cut
360
361# the following variables are defined in .xs and must not be re-created
362our @CB_GLOBAL = (); # registry for all global events
363our @CB_ATTACHABLE = (); # registry for all attachables
364our @CB_OBJECT = (); # all objects (should not be used except in emergency)
365our @CB_PLAYER = ();
366our @CB_CLIENT = ();
367our @CB_TYPE = (); # registry for type (cf-object class) based events
368our @CB_MAP = ();
369
370my %attachment;
371
372sub _attach_cb($$$$) {
373 my ($registry, $event, $prio, $cb) = @_;
374
375 use sort 'stable';
376
377 $cb = [$prio, $cb];
378
379 @{$registry->[$event]} = sort
380 { $a->[0] cmp $b->[0] }
381 @{$registry->[$event] || []}, $cb;
382}
383
384# hack
385my %attachable_klass = map +($_ => 1), KLASS_OBJECT, KLASS_CLIENT, KLASS_PLAYER, KLASS_MAP;
386
387# attach handles attaching event callbacks
388# the only thing the caller has to do is pass the correct
389# registry (== where the callback attaches to).
390sub _attach {
391 my ($registry, $klass, @arg) = @_;
392
393 my $object_type;
394 my $prio = 0;
395 my %cb_id = map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == $klass, 0 .. $#EVENT;
396
397 #TODO: get rid of this hack
398 if ($attachable_klass{$klass}) {
399 %cb_id = (%cb_id, map +("on_" . lc $EVENT[$_][0], $_) , grep $EVENT[$_][1] == KLASS_ATTACHABLE, 0 .. $#EVENT);
400 }
401
402 while (@arg) {
403 my $type = shift @arg;
404
405 if ($type eq "prio") {
406 $prio = shift @arg;
407
408 } elsif ($type eq "type") {
409 $object_type = shift @arg;
410 $registry = $CB_TYPE[$object_type] ||= [];
411
412 } elsif ($type eq "subtype") {
413 defined $object_type or Carp::croak "subtype specified without type";
414 my $object_subtype = shift @arg;
415 $registry = $CB_TYPE[$object_type + $object_subtype * NUM_SUBTYPES] ||= [];
416
417 } elsif ($type eq "package") {
418 my $pkg = shift @arg;
419
420 while (my ($name, $id) = each %cb_id) {
421 if (my $cb = $pkg->can ($name)) {
422 _attach_cb $registry, $id, $prio, $cb;
423 }
424 }
425
426 } elsif (exists $cb_id{$type}) {
427 _attach_cb $registry, $cb_id{$type}, $prio, shift @arg;
428
429 } elsif (ref $type) {
430 warn "attaching objects not supported, ignoring.\n";
431
432 } else {
433 shift @arg;
434 warn "attach argument '$type' not supported, ignoring.\n";
435 }
436 }
437}
438
439sub _object_attach {
440 my ($obj, $name, %arg) = @_;
441
442 return if exists $obj->{_attachment}{$name};
443
444 if (my $attach = $attachment{$name}) {
445 my $registry = $obj->registry;
446
447 for (@$attach) {
448 my ($klass, @attach) = @$_;
449 _attach $registry, $klass, @attach;
450 }
451
452 $obj->{$name} = \%arg;
453 } else {
454 warn "object uses attachment '$name' that is not available, postponing.\n";
455 }
456
457 $obj->{_attachment}{$name} = undef;
458}
459
460sub cf::attachable::attach {
461 if (ref $_[0]) {
462 _object_attach @_;
463 } else {
464 _attach shift->_attach_registry, @_;
465 }
466};
467
468# all those should be optimised
469sub cf::attachable::detach {
470 my ($obj, $name) = @_;
471
472 if (ref $obj) {
473 delete $obj->{_attachment}{$name};
474 reattach ($obj);
475 } else {
476 Carp::croak "cannot, currently, detach class attachments";
477 }
478};
479
480sub cf::attachable::attached {
481 my ($obj, $name) = @_;
482
483 exists $obj->{_attachment}{$name}
484}
485
486for my $klass (qw(ATTACHABLE GLOBAL OBJECT PLAYER CLIENT MAP)) {
487 eval "#line " . __LINE__ . " 'cf.pm'
488 sub cf::\L$klass\E::_attach_registry {
489 (\\\@CB_$klass, KLASS_$klass)
490 }
491
492 sub cf::\L$klass\E::attachment {
493 my \$name = shift;
494
495 \$attachment{\$name} = [[KLASS_$klass, \@_]];
496 }
497 ";
498 die if $@;
499}
500
501our $override;
502our @invoke_results = (); # referenced from .xs code. TODO: play tricks with reify and mortals?
503
504sub override {
505 $override = 1;
506 @invoke_results = ();
507}
508
509sub do_invoke {
510 my $event = shift;
511 my $callbacks = shift;
512
513 @invoke_results = ();
514
515 local $override;
516
517 for (@$callbacks) {
518 eval { &{$_->[1]} };
519
520 if ($@) {
521 warn "$@";
522 warn "... while processing $EVENT[$event][0](@_) event, skipping processing altogether.\n";
523 override;
524 }
525
526 return 1 if $override;
527 }
528
529 0
530}
531
532=item $bool = cf::global::invoke (EVENT_CLASS_XXX, ...)
533
534=item $bool = $attachable->invoke (EVENT_CLASS_XXX, ...)
535
536Generate an object-specific event with the given arguments.
537
538This API is preliminary (most likely, the EVENT_CLASS_xxx prefix will be
539removed in future versions), and there is no public API to access override
540results (if you must, access C<@cf::invoke_results> directly).
541
463=back 542=back
464 543
465=cut 544=cut
466
467*cf::object::valid =
468*cf::player::valid =
469*cf::map::valid = \&cf::_valid;
470 545
471############################################################################# 546#############################################################################
472# object support 547# object support
473 548
474sub instantiate {
475 my ($obj, $data) = @_;
476
477 $data = from_json $data;
478
479 for (@$data) {
480 my ($name, $args) = @$_;
481
482 $obj->attach ($name, %{$args || {} });
483 }
484}
485
486# basically do the same as instantiate, without calling instantiate
487sub reattach { 549sub reattach {
550 # basically do the same as instantiate, without calling instantiate
488 my ($obj) = @_; 551 my ($obj) = @_;
552
489 my $registry = $obj->registry; 553 my $registry = $obj->registry;
490 554
491 @$registry = (); 555 @$registry = ();
492 556
493 delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} }; 557 delete $obj->{_attachment} unless scalar keys %{ $obj->{_attachment} || {} };
494 558
495 for my $name (keys %{ $obj->{_attachment} || {} }) { 559 for my $name (keys %{ $obj->{_attachment} || {} }) {
496 if (my $attach = $attachment{$name}) { 560 if (my $attach = $attachment{$name}) {
497 for (@$attach) { 561 for (@$attach) {
498 my ($klass, @attach) = @$_; 562 my ($klass, @attach) = @$_;
499 _attach @$registry, $klass, @attach; 563 _attach $registry, $klass, @attach;
500 } 564 }
501 } else { 565 } else {
502 warn "object uses attachment '$name' that is not available, postponing.\n"; 566 warn "object uses attachment '$name' that is not available, postponing.\n";
503 } 567 }
504 } 568 }
505} 569}
506 570
507sub object_freezer_save { 571cf::attachable->attach (
508 my ($filename, $rdata, $objs) = @_;
509
510 if (length $$rdata) {
511 warn sprintf "saving %s (%d,%d)\n",
512 $filename, length $$rdata, scalar @$objs;
513
514 if (open my $fh, ">:raw", "$filename~") {
515 chmod SAVE_MODE, $fh;
516 syswrite $fh, $$rdata;
517 close $fh;
518
519 if (@$objs && open my $fh, ">:raw", "$filename.pst~") {
520 chmod SAVE_MODE, $fh;
521 syswrite $fh, Storable::nfreeze { version => 1, objs => $objs };
522 close $fh;
523 rename "$filename.pst~", "$filename.pst";
524 } else {
525 unlink "$filename.pst";
526 }
527
528 rename "$filename~", $filename;
529 } else {
530 warn "FATAL: $filename~: $!\n";
531 }
532 } else {
533 unlink $filename;
534 unlink "$filename.pst";
535 }
536}
537
538sub object_freezer_as_string {
539 my ($rdata, $objs) = @_;
540
541 use Data::Dumper;
542
543 $$rdata . Dumper $objs
544}
545
546sub object_thawer_load {
547 my ($filename) = @_;
548
549 local $/;
550
551 my $av;
552
553 #TODO: use sysread etc.
554 if (open my $data, "<:raw:perlio", $filename) {
555 $data = <$data>;
556 if (open my $pst, "<:raw:perlio", "$filename.pst") {
557 $av = eval { (Storable::thaw <$pst>)->{objs} };
558 }
559 return ($data, $av);
560 }
561
562 ()
563}
564
565attach_to_objects
566 prio => -1000000, 572 prio => -1000000,
573 on_instantiate => sub {
574 my ($obj, $data) = @_;
575
576 $data = from_json $data;
577
578 for (@$data) {
579 my ($name, $args) = @$_;
580
581 $obj->attach ($name, %{$args || {} });
582 }
583 },
584 on_reattach => \&reattach,
567 on_clone => sub { 585 on_clone => sub {
568 my ($src, $dst) = @_; 586 my ($src, $dst) = @_;
569 587
570 @{$dst->registry} = @{$src->registry}; 588 @{$dst->registry} = @{$src->registry};
571 589
572 %$dst = %$src; 590 %$dst = %$src;
573 591
574 %{$dst->{_attachment}} = %{$src->{_attachment}} 592 %{$dst->{_attachment}} = %{$src->{_attachment}}
575 if exists $src->{_attachment}; 593 if exists $src->{_attachment};
576 }, 594 },
577; 595);
596
597sub object_freezer_save {
598 my ($filename, $rdata, $objs) = @_;
599
600 sync_job {
601 if (length $$rdata) {
602 warn sprintf "saving %s (%d,%d)\n",
603 $filename, length $$rdata, scalar @$objs;
604
605 if (my $fh = aio_open "$filename~", O_WRONLY | O_CREAT, 0600) {
606 chmod SAVE_MODE, $fh;
607 aio_write $fh, 0, (length $$rdata), $$rdata, 0;
608 aio_fsync $fh;
609 close $fh;
610
611 if (@$objs) {
612 if (my $fh = aio_open "$filename.pst~", O_WRONLY | O_CREAT, 0600) {
613 chmod SAVE_MODE, $fh;
614 my $data = Storable::nfreeze { version => 1, objs => $objs };
615 aio_write $fh, 0, (length $data), $data, 0;
616 aio_fsync $fh;
617 close $fh;
618 aio_rename "$filename.pst~", "$filename.pst";
619 }
620 } else {
621 aio_unlink "$filename.pst";
622 }
623
624 aio_rename "$filename~", $filename;
625 } else {
626 warn "FATAL: $filename~: $!\n";
627 }
628 } else {
629 aio_unlink $filename;
630 aio_unlink "$filename.pst";
631 }
632 }
633}
634
635sub object_freezer_as_string {
636 my ($rdata, $objs) = @_;
637
638 use Data::Dumper;
639
640 $$rdata . Dumper $objs
641}
642
643sub object_thawer_load {
644 my ($filename) = @_;
645
646 my ($data, $av);
647
648 (aio_load $filename, $data) >= 0
649 or return;
650
651 unless (aio_stat "$filename.pst") {
652 (aio_load "$filename.pst", $av) >= 0
653 or return;
654 $av = eval { (Storable::thaw <$av>)->{objs} };
655 }
656
657 return ($data, $av);
658}
578 659
579############################################################################# 660#############################################################################
580# command handling &c 661# command handling &c
581 662
582=item cf::register_command $name => \&callback($ob,$args); 663=item cf::register_command $name => \&callback($ob,$args);
611 #warn "registering extcmd '$name' to '$caller'"; 692 #warn "registering extcmd '$name' to '$caller'";
612 693
613 $EXTCMD{$name} = [$cb, $caller]; 694 $EXTCMD{$name} = [$cb, $caller];
614} 695}
615 696
616attach_to_players 697cf::player->attach (
617 on_command => sub { 698 on_command => sub {
618 my ($pl, $name, $params) = @_; 699 my ($pl, $name, $params) = @_;
619 700
620 my $cb = $COMMAND{$name} 701 my $cb = $COMMAND{$name}
621 or return; 702 or return;
641 warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n"; 722 warn "player " . ($pl->ob->name) . " sent unparseable ext message: <$buf>\n";
642 } 723 }
643 724
644 cf::override; 725 cf::override;
645 }, 726 },
646; 727);
647 728
648sub register { 729sub register {
649 my ($base, $pkg) = @_; 730 my ($base, $pkg) = @_;
650 731
651 #TODO 732 #TODO
741 defined $path or return; 822 defined $path or return;
742 823
743 unlink "$path.pst"; 824 unlink "$path.pst";
744}; 825};
745 826
746attach_to_maps prio => -10000, package => cf::mapsupport::; 827cf::map->attach (prio => -10000, package => cf::mapsupport::);
747 828
748############################################################################# 829#############################################################################
749# load/save perl data associated with player->ob objects 830# load/save perl data associated with player->ob objects
750 831
751sub all_objects(@) { 832sub all_objects(@) {
752 @_, map all_objects ($_->inv), @_ 833 @_, map all_objects ($_->inv), @_
753} 834}
754 835
755# TODO: compatibility cruft, remove when no longer needed 836# TODO: compatibility cruft, remove when no longer needed
756attach_to_players 837cf::player->attach (
757 on_load => sub { 838 on_load => sub {
758 my ($pl, $path) = @_; 839 my ($pl, $path) = @_;
759 840
760 for my $o (all_objects $pl->ob) { 841 for my $o (all_objects $pl->ob) {
761 if (my $value = $o->get_ob_key_value ("_perl_data")) { 842 if (my $value = $o->get_ob_key_value ("_perl_data")) {
763 844
764 %$o = %{ Storable::thaw pack "H*", $value }; 845 %$o = %{ Storable::thaw pack "H*", $value };
765 } 846 }
766 } 847 }
767 }, 848 },
768; 849);
769 850
770############################################################################# 851#############################################################################
771 852
772=head2 CORE EXTENSIONS 853=head2 CORE EXTENSIONS
773 854
774Functions and methods that extend core crossfire objects. 855Functions and methods that extend core crossfire objects.
856
857=head3 cf::player
775 858
776=over 4 859=over 4
777 860
778=item cf::player::exists $login 861=item cf::player::exists $login
779 862
784sub cf::player::exists($) { 867sub cf::player::exists($) {
785 cf::player::find $_[0] 868 cf::player::find $_[0]
786 or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2; 869 or -f sprintf "%s/%s/%s/%s.pl", cf::localdir, cf::playerdir, ($_[0]) x 2;
787} 870}
788 871
872=item $player->ext_reply ($msgid, $msgtype, %msg)
873
874Sends an ext reply to the player.
875
876=cut
877
878sub cf::player::ext_reply($$$%) {
879 my ($self, $id, %msg) = @_;
880
881 $msg{msgid} = $id;
882
883 $self->send ("ext " . to_json \%msg);
884}
885
886=back
887
888=head3 cf::object::player
889
890=over 4
891
789=item $player_object->reply ($npc, $msg[, $flags]) 892=item $player_object->reply ($npc, $msg[, $flags])
790 893
791Sends a message to the player, as if the npc C<$npc> replied. C<$npc> 894Sends a message to the player, as if the npc C<$npc> replied. C<$npc>
792can be C<undef>. Does the right thing when the player is currently in a 895can be C<undef>. Does the right thing when the player is currently in a
793dialogue with the given NPC character. 896dialogue with the given NPC character.
794 897
795=cut 898=cut
796 899
797# rough implementation of a future "reply" method that works 900# rough implementation of a future "reply" method that works
798# with dialog boxes. 901# with dialog boxes.
902#TODO: the first argument must go, split into a $npc->reply_to ( method
799sub cf::object::player::reply($$$;$) { 903sub cf::object::player::reply($$$;$) {
800 my ($self, $npc, $msg, $flags) = @_; 904 my ($self, $npc, $msg, $flags) = @_;
801 905
802 $flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4; 906 $flags = cf::NDI_BROWN | cf::NDI_UNIQUE unless @_ >= 4;
803 907
807 $msg = $npc->name . " says: $msg" if $npc; 911 $msg = $npc->name . " says: $msg" if $npc;
808 $self->message ($msg, $flags); 912 $self->message ($msg, $flags);
809 } 913 }
810} 914}
811 915
812=item $player->ext_reply ($msgid, $msgtype, %msg)
813
814Sends an ext reply to the player.
815
816=cut
817
818sub cf::player::ext_reply($$$%) {
819 my ($self, $id, %msg) = @_;
820
821 $msg{msgid} = $id;
822
823 $self->send ("ext " . to_json \%msg);
824}
825
826=item $player_object->may ("access") 916=item $player_object->may ("access")
827 917
828Returns wether the given player is authorized to access resource "access" 918Returns wether the given player is authorized to access resource "access"
829(e.g. "command_wizcast"). 919(e.g. "command_wizcast").
830 920
837 (ref $cf::CFG{"may_$access"} 927 (ref $cf::CFG{"may_$access"}
838 ? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}} 928 ? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
839 : $cf::CFG{"may_$access"}) 929 : $cf::CFG{"may_$access"})
840} 930}
841 931
842=cut 932=head3 cf::client
843 933
844############################################################################# 934=over 4
935
936=item $client->send_drawinfo ($text, $flags)
937
938Sends a drawinfo packet to the client. Circumvents output buffering so
939should not be used under normal circumstances.
940
941=cut
942
943sub cf::client::send_drawinfo {
944 my ($self, $text, $flags) = @_;
945
946 utf8::encode $text;
947 $self->send_packet (sprintf "drawinfo %d %s", $flags, $text);
948}
949
950
951=item $success = $client->query ($flags, "text", \&cb)
952
953Queues a query to the client, calling the given callback with
954the reply text on a reply. flags can be C<cf::CS_QUERY_YESNO>,
955C<cf::CS_QUERY_SINGLECHAR> or C<cf::CS_QUERY_HIDEINPUT> or C<0>.
956
957Queries can fail, so check the return code. Or don't, as queries will become
958reliable at some point in the future.
959
960=cut
961
962sub cf::client::query {
963 my ($self, $flags, $text, $cb) = @_;
964
965 return unless $self->state == ST_PLAYING
966 || $self->state == ST_SETUP
967 || $self->state == ST_CUSTOM;
968
969 $self->state (ST_CUSTOM);
970
971 utf8::encode $text;
972 push @{ $self->{query_queue} }, [(sprintf "query %d %s", $flags, $text), $cb];
973
974 $self->send_packet ($self->{query_queue}[0][0])
975 if @{ $self->{query_queue} } == 1;
976}
977
978cf::client->attach (
979 on_reply => sub {
980 my ($ns, $msg) = @_;
981
982 # this weird shuffling is so that direct followup queries
983 # get handled first
984 my $queue = delete $ns->{query_queue};
985
986 (shift @$queue)->[1]->($msg);
987
988 push @{ $ns->{query_queue} }, @$queue;
989
990 if (@{ $ns->{query_queue} } == @$queue) {
991 if (@$queue) {
992 $ns->send_packet ($ns->{query_queue}[0][0]);
993 } else {
994 $ns->state (ST_PLAYING) if $ns->state == ST_CUSTOM;
995 }
996 }
997 },
998);
999
1000=item $client->coro (\&cb)
1001
1002Create a new coroutine, running the specified callback. The coroutine will
1003be automatically cancelled when the client gets destroyed (e.g. on logout,
1004or loss of connection).
1005
1006=cut
1007
1008sub cf::client::coro {
1009 my ($self, $cb) = @_;
1010
1011 my $coro; $coro = async {
1012 eval {
1013 $cb->();
1014 };
1015 warn $@ if $@;
1016 };
1017
1018 $coro->on_destroy (sub {
1019 delete $self->{_coro}{$coro+0};
1020 });
1021
1022 $self->{_coro}{$coro+0} = $coro;
1023
1024 $coro
1025}
1026
1027cf::client->attach (
1028 on_destroy => sub {
1029 my ($ns) = @_;
1030
1031 $_->cancel for values %{ (delete $ns->{_coro}) || {} };
1032 },
1033);
1034
1035=back
1036
845 1037
846=head2 SAFE SCRIPTING 1038=head2 SAFE SCRIPTING
847 1039
848Functions that provide a safe environment to compile and execute 1040Functions that provide a safe environment to compile and execute
849snippets of perl code without them endangering the safety of the server 1041snippets of perl code without them endangering the safety of the server
864 1056
865=pod 1057=pod
866 1058
867The following fucntions and emthods are available within a safe environment: 1059The following fucntions and emthods are available within a safe environment:
868 1060
869 cf::object contr pay_amount pay_player 1061 cf::object contr pay_amount pay_player map
870 cf::object::player player 1062 cf::object::player player
871 cf::player peaceful 1063 cf::player peaceful
1064 cf::map trigger
872 1065
873=cut 1066=cut
874 1067
875for ( 1068for (
876 ["cf::object" => qw(contr pay_amount pay_player)], 1069 ["cf::object" => qw(contr pay_amount pay_player map)],
877 ["cf::object::player" => qw(player)], 1070 ["cf::object::player" => qw(player)],
878 ["cf::player" => qw(peaceful)], 1071 ["cf::player" => qw(peaceful)],
1072 ["cf::map" => qw(trigger)],
879) { 1073) {
880 no strict 'refs'; 1074 no strict 'refs';
881 my ($pkg, @funs) = @$_; 1075 my ($pkg, @funs) = @$_;
882 *{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"}) 1076 *{"safe::$pkg\::$_"} = $safe_hole->wrap (\&{"$pkg\::$_"})
883 for @funs; 1077 for @funs;
1047 $DB->{$_[0]} = $_[1]; 1241 $DB->{$_[0]} = $_[1];
1048 } 1242 }
1049 db_dirty; 1243 db_dirty;
1050 } 1244 }
1051 1245
1052 attach_global 1246 cf::global->attach (
1053 prio => 10000, 1247 prio => 10000,
1054 on_cleanup => sub { 1248 on_cleanup => sub {
1055 db_sync; 1249 db_sync;
1056 }, 1250 },
1057 ; 1251 );
1058} 1252}
1059 1253
1060############################################################################# 1254#############################################################################
1061# the server's main() 1255# the server's main()
1062 1256
1076} 1270}
1077 1271
1078############################################################################# 1272#############################################################################
1079# initialisation 1273# initialisation
1080 1274
1081sub _perl_reload(&) { 1275sub _perl_reload() {
1082 my ($msg) = @_; 1276 warn "reloading...";
1083
1084 $msg->("reloading...");
1085 1277
1086 eval { 1278 eval {
1279 local $FREEZE = 1;
1280
1281 cf::emergency_save;
1282
1087 # cancel all watchers 1283 # cancel all watchers
1088 for (Event::all_watchers) { 1284 for (Event::all_watchers) {
1089 $_->cancel if $_->data & WF_AUTOCANCEL; 1285 $_->cancel if $_->data & WF_AUTOCANCEL;
1090 } 1286 }
1091 1287
1288 # cancel all extension coros
1289 $_->cancel for values %EXT_CORO;
1290 %EXT_CORO = ();
1291
1092 # unload all extensions 1292 # unload all extensions
1093 for (@exts) { 1293 for (@exts) {
1094 $msg->("unloading <$_>"); 1294 warn "unloading <$_>";
1095 unload_extension $_; 1295 unload_extension $_;
1096 } 1296 }
1097 1297
1098 # unload all modules loaded from $LIBDIR 1298 # unload all modules loaded from $LIBDIR
1099 while (my ($k, $v) = each %INC) { 1299 while (my ($k, $v) = each %INC) {
1100 next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/; 1300 next unless $v =~ /^\Q$LIBDIR\E\/.*\.pm$/;
1101 1301
1102 $msg->("removing <$k>"); 1302 warn "removing <$k>";
1103 delete $INC{$k}; 1303 delete $INC{$k};
1104 1304
1105 $k =~ s/\.pm$//; 1305 $k =~ s/\.pm$//;
1106 $k =~ s/\//::/g; 1306 $k =~ s/\//::/g;
1107 1307
1112 Symbol::delete_package $k; 1312 Symbol::delete_package $k;
1113 } 1313 }
1114 1314
1115 # sync database to disk 1315 # sync database to disk
1116 cf::db_sync; 1316 cf::db_sync;
1317 IO::AIO::flush;
1117 1318
1118 # get rid of safe::, as good as possible 1319 # get rid of safe::, as good as possible
1119 Symbol::delete_package "safe::$_" 1320 Symbol::delete_package "safe::$_"
1120 for qw(cf::object cf::object::player cf::player cf::map cf::party cf::region); 1321 for qw(cf::attachable cf::object cf::object::player cf::client cf::player cf::map cf::party cf::region);
1121 1322
1122 # remove register_script_function callbacks 1323 # remove register_script_function callbacks
1123 # TODO 1324 # TODO
1124 1325
1125 # unload cf.pm "a bit" 1326 # unload cf.pm "a bit"
1128 # don't, removes xs symbols, too, 1329 # don't, removes xs symbols, too,
1129 # and global variables created in xs 1330 # and global variables created in xs
1130 #Symbol::delete_package __PACKAGE__; 1331 #Symbol::delete_package __PACKAGE__;
1131 1332
1132 # reload cf.pm 1333 # reload cf.pm
1133 $msg->("reloading cf.pm"); 1334 warn "reloading cf.pm";
1134 require cf; 1335 require cf;
1336 cf::_connect_to_perl; # nominally unnecessary, but cannot hurt
1135 1337
1136 # load config and database again 1338 # load config and database again
1137 cf::cfg_load; 1339 cf::cfg_load;
1138 cf::db_load; 1340 cf::db_load;
1139 1341
1140 # load extensions 1342 # load extensions
1141 $msg->("load extensions"); 1343 warn "load extensions";
1142 cf::load_extensions; 1344 cf::load_extensions;
1143 1345
1144 # reattach attachments to objects 1346 # reattach attachments to objects
1145 $msg->("reattach"); 1347 warn "reattach";
1146 _global_reattach; 1348 _global_reattach;
1147 }; 1349 };
1148 $msg->($@) if $@; 1350 warn $@ if $@;
1149 1351
1150 $msg->("reloaded"); 1352 warn "reloaded";
1151}; 1353};
1152 1354
1153sub perl_reload() { 1355sub perl_reload() {
1154 _perl_reload { 1356 _perl_reload;
1155 warn $_[0];
1156 print "$_[0]\n";
1157 };
1158} 1357}
1159 1358
1160register "<global>", __PACKAGE__; 1359register "<global>", __PACKAGE__;
1161 1360
1162register_command "perl-reload" => sub { 1361register_command "perl-reload" => sub {
1163 my ($who, $arg) = @_; 1362 my ($who, $arg) = @_;
1164 1363
1165 if ($who->flag (FLAG_WIZ)) { 1364 if ($who->flag (FLAG_WIZ)) {
1365 $who->message ("reloading...");
1166 _perl_reload { 1366 _perl_reload;
1167 warn $_[0];
1168 $who->message ($_[0]);
1169 };
1170 } 1367 }
1171}; 1368};
1172 1369
1173unshift @INC, $LIBDIR; 1370unshift @INC, $LIBDIR;
1174 1371
1175$TICK_WATCHER = Event->timer ( 1372$TICK_WATCHER = Event->timer (
1373 reentrant => 0,
1176 prio => 1, 1374 prio => 0,
1177 async => 1,
1178 at => $NEXT_TICK || 1, 1375 at => $NEXT_TICK || $TICK,
1179 data => WF_AUTOCANCEL, 1376 data => WF_AUTOCANCEL,
1180 cb => sub { 1377 cb => sub {
1378 unless ($FREEZE) {
1181 cf::server_tick; # one server iteration 1379 cf::server_tick; # one server iteration
1380 $RUNTIME += $TICK;
1381 }
1182 1382
1183 my $NOW = Event::time;
1184 $NEXT_TICK += $TICK; 1383 $NEXT_TICK += $TICK;
1185 1384
1186 # if we are delayed by four ticks or more, skip them all 1385 # if we are delayed by four ticks or more, skip them all
1187 $NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4; 1386 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4;
1188 1387
1189 $TICK_WATCHER->at ($NEXT_TICK); 1388 $TICK_WATCHER->at ($NEXT_TICK);
1190 $TICK_WATCHER->start; 1389 $TICK_WATCHER->start;
1191 }, 1390 },
1192); 1391);
1197 poll => 'r', 1396 poll => 'r',
1198 prio => 5, 1397 prio => 5,
1199 data => WF_AUTOCANCEL, 1398 data => WF_AUTOCANCEL,
1200 cb => \&IO::AIO::poll_cb); 1399 cb => \&IO::AIO::poll_cb);
1201 1400
1401# we must not ever block the main coroutine
1402$Coro::idle = sub {
1403 #Carp::cluck "FATAL: Coro::idle was called, major BUG\n";#d#
1404 warn "FATAL: Coro::idle was called, major BUG\n";
1405 (Coro::unblock_sub {
1406 Event::one_event;
1407 })->();
1408};
1409
12021 14101
1203 1411

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