-
Notifications
You must be signed in to change notification settings - Fork 10.9k
/
Gate.php
560 lines (489 loc) · 15 KB
/
Gate.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
<?php
namespace Illuminate\Auth\Access;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use InvalidArgumentException;
use Illuminate\Contracts\Container\Container;
use Illuminate\Contracts\Auth\Access\Gate as GateContract;
class Gate implements GateContract
{
use HandlesAuthorization;
/**
* The container instance.
*
* @var \Illuminate\Contracts\Container\Container
*/
protected $container;
/**
* The user resolver callable.
*
* @var callable
*/
protected $userResolver;
/**
* All of the defined abilities.
*
* @var array
*/
protected $abilities = [];
/**
* All of the defined policies.
*
* @var array
*/
protected $policies = [];
/**
* All of the registered before callbacks.
*
* @var array
*/
protected $beforeCallbacks = [];
/**
* All of the registered after callbacks.
*
* @var array
*/
protected $afterCallbacks = [];
/**
* Create a new gate instance.
*
* @param \Illuminate\Contracts\Container\Container $container
* @param callable $userResolver
* @param array $abilities
* @param array $policies
* @param array $beforeCallbacks
* @param array $afterCallbacks
* @return void
*/
public function __construct(Container $container, callable $userResolver, array $abilities = [],
array $policies = [], array $beforeCallbacks = [], array $afterCallbacks = [])
{
$this->policies = $policies;
$this->container = $container;
$this->abilities = $abilities;
$this->userResolver = $userResolver;
$this->afterCallbacks = $afterCallbacks;
$this->beforeCallbacks = $beforeCallbacks;
}
/**
* Determine if a given ability has been defined.
*
* @param string|array $ability
* @return bool
*/
public function has($ability)
{
$abilities = is_array($ability) ? $ability : func_get_args();
foreach ($abilities as $ability) {
if (! isset($this->abilities[$ability])) {
return false;
}
}
return true;
}
/**
* Define a new ability.
*
* @param string $ability
* @param callable|string $callback
* @return $this
*
* @throws \InvalidArgumentException
*/
public function define($ability, $callback)
{
if (is_callable($callback)) {
$this->abilities[$ability] = $callback;
} elseif (is_string($callback) && Str::contains($callback, '@')) {
$this->abilities[$ability] = $this->buildAbilityCallback($ability, $callback);
} else {
throw new InvalidArgumentException("Callback must be a callable or a 'Class@method' string.");
}
return $this;
}
/**
* Define abilities for a resource.
*
* @param string $name
* @param string $class
* @param array|null $abilities
* @return $this
*/
public function resource($name, $class, array $abilities = null)
{
$abilities = $abilities ?: [
'view' => 'view',
'create' => 'create',
'update' => 'update',
'delete' => 'delete',
];
foreach ($abilities as $ability => $method) {
$this->define($name.'.'.$ability, $class.'@'.$method);
}
return $this;
}
/**
* Create the ability callback for a callback string.
*
* @param string $ability
* @param string $callback
* @return \Closure
*/
protected function buildAbilityCallback($ability, $callback)
{
return function () use ($ability, $callback) {
[$class, $method] = Str::parseCallback($callback);
$policy = $this->resolvePolicy($class);
$arguments = func_get_args();
$user = array_shift($arguments);
$result = $this->callPolicyBefore(
$policy, $user, $ability, $arguments
);
if (! is_null($result)) {
return $result;
}
return $policy->{$method}(...func_get_args());
};
}
/**
* Define a policy class for a given class type.
*
* @param string $class
* @param string $policy
* @return $this
*/
public function policy($class, $policy)
{
$this->policies[$class] = $policy;
return $this;
}
/**
* Register a callback to run before all Gate checks.
*
* @param callable $callback
* @return $this
*/
public function before(callable $callback)
{
$this->beforeCallbacks[] = $callback;
return $this;
}
/**
* Register a callback to run after all Gate checks.
*
* @param callable $callback
* @return $this
*/
public function after(callable $callback)
{
$this->afterCallbacks[] = $callback;
return $this;
}
/**
* Determine if the given ability should be granted for the current user.
*
* @param string $ability
* @param array|mixed $arguments
* @return bool
*/
public function allows($ability, $arguments = [])
{
return $this->check($ability, $arguments);
}
/**
* Determine if the given ability should be denied for the current user.
*
* @param string $ability
* @param array|mixed $arguments
* @return bool
*/
public function denies($ability, $arguments = [])
{
return ! $this->allows($ability, $arguments);
}
/**
* Determine if all of the given abilities should be granted for the current user.
*
* @param iterable|string $abilities
* @param array|mixed $arguments
* @return bool
*/
public function check($abilities, $arguments = [])
{
return collect($abilities)->every(function ($ability) use ($arguments) {
try {
return (bool) $this->raw($ability, $arguments);
} catch (AuthorizationException $e) {
return false;
}
});
}
/**
* Determine if any one of the given abilities should be granted for the current user.
*
* @param iterable|string $abilities
* @param array|mixed $arguments
* @return bool
*/
public function any($abilities, $arguments = [])
{
return collect($abilities)->contains(function ($ability) use ($arguments) {
return $this->check($ability, $arguments);
});
}
/**
* Determine if the given ability should be granted for the current user.
*
* @param string $ability
* @param array|mixed $arguments
* @return \Illuminate\Auth\Access\Response
*
* @throws \Illuminate\Auth\Access\AuthorizationException
*/
public function authorize($ability, $arguments = [])
{
$result = $this->raw($ability, $arguments);
if ($result instanceof Response) {
return $result;
}
return $result ? $this->allow() : $this->deny();
}
/**
* Get the raw result from the authorization callback.
*
* @param string $ability
* @param array|mixed $arguments
* @return mixed
*/
protected function raw($ability, $arguments = [])
{
if (! $user = $this->resolveUser()) {
return false;
}
$arguments = Arr::wrap($arguments);
// First we will call the "before" callbacks for the Gate. If any of these give
// back a non-null response, we will immediately return that result in order
// to let the developers override all checks for some authorization cases.
$result = $this->callBeforeCallbacks(
$user, $ability, $arguments
);
if (is_null($result)) {
$result = $this->callAuthCallback($user, $ability, $arguments);
}
// After calling the authorization callback, we will call the "after" callbacks
// that are registered with the Gate, which allows a developer to do logging
// if that is required for this application. Then we'll return the result.
$this->callAfterCallbacks(
$user, $ability, $arguments, $result
);
return $result;
}
/**
* Resolve and call the appropriate authorization callback.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param string $ability
* @param array $arguments
* @return bool
*/
protected function callAuthCallback($user, $ability, array $arguments)
{
$callback = $this->resolveAuthCallback($user, $ability, $arguments);
return $callback($user, ...$arguments);
}
/**
* Call all of the before callbacks and return if a result is given.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param string $ability
* @param array $arguments
* @return bool|null
*/
protected function callBeforeCallbacks($user, $ability, array $arguments)
{
$arguments = array_merge([$user, $ability], [$arguments]);
foreach ($this->beforeCallbacks as $before) {
if (! is_null($result = $before(...$arguments))) {
return $result;
}
}
}
/**
* Call all of the after callbacks with check result.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param string $ability
* @param array $arguments
* @param bool $result
* @return void
*/
protected function callAfterCallbacks($user, $ability, array $arguments, $result)
{
$arguments = array_merge([$user, $ability, $result], [$arguments]);
foreach ($this->afterCallbacks as $after) {
$after(...$arguments);
}
}
/**
* Resolve the callable for the given ability and arguments.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param string $ability
* @param array $arguments
* @return callable
*/
protected function resolveAuthCallback($user, $ability, array $arguments)
{
if (isset($arguments[0]) &&
! is_null($policy = $this->getPolicyFor($arguments[0])) &&
$callback = $this->resolvePolicyCallback($user, $ability, $arguments, $policy)) {
return $callback;
}
if (isset($this->abilities[$ability])) {
return $this->abilities[$ability];
}
return function () {
return false;
};
}
/**
* Get a policy instance for a given class.
*
* @param object|string $class
* @return mixed
*/
public function getPolicyFor($class)
{
if (is_object($class)) {
$class = get_class($class);
}
if (! is_string($class)) {
return;
}
if (isset($this->policies[$class])) {
return $this->resolvePolicy($this->policies[$class]);
}
foreach ($this->policies as $expected => $policy) {
if (is_subclass_of($class, $expected)) {
return $this->resolvePolicy($policy);
}
}
}
/**
* Build a policy class instance of the given type.
*
* @param object|string $class
* @return mixed
*/
public function resolvePolicy($class)
{
return $this->container->make($class);
}
/**
* Resolve the callback for a policy check.
*
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param string $ability
* @param array $arguments
* @param mixed $policy
* @return bool|callable
*/
protected function resolvePolicyCallback($user, $ability, array $arguments, $policy)
{
if (! is_callable([$policy, $this->formatAbilityToMethod($ability)])) {
return false;
}
return function () use ($user, $ability, $arguments, $policy) {
// This callback will be responsible for calling the policy's before method and
// running this policy method if necessary. This is used to when objects are
// mapped to policy objects in the user's configurations or on this class.
$result = $this->callPolicyBefore(
$policy, $user, $ability, $arguments
);
// When we receive a non-null result from this before method, we will return it
// as the "final" results. This will allow developers to override the checks
// in this policy to return the result for all rules defined in the class.
if (! is_null($result)) {
return $result;
}
$ability = $this->formatAbilityToMethod($ability);
// If this first argument is a string, that means they are passing a class name
// to the policy. We will remove the first argument from this argument array
// because this policy already knows what type of models it can authorize.
if (isset($arguments[0]) && is_string($arguments[0])) {
array_shift($arguments);
}
return is_callable([$policy, $ability])
? $policy->{$ability}($user, ...$arguments)
: false;
};
}
/**
* Call the "before" method on the given policy, if applicable.
*
* @param mixed $policy
* @param \Illuminate\Contracts\Auth\Authenticatable $user
* @param string $ability
* @param array $arguments
* @return mixed
*/
protected function callPolicyBefore($policy, $user, $ability, $arguments)
{
if (method_exists($policy, 'before')) {
return $policy->before($user, $ability, ...$arguments);
}
}
/**
* Format the policy ability into a method name.
*
* @param string $ability
* @return string
*/
protected function formatAbilityToMethod($ability)
{
return strpos($ability, '-') !== false ? Str::camel($ability) : $ability;
}
/**
* Get a gate instance for the given user.
*
* @param \Illuminate\Contracts\Auth\Authenticatable|mixed $user
* @return static
*/
public function forUser($user)
{
$callback = function () use ($user) {
return $user;
};
return new static(
$this->container, $callback, $this->abilities,
$this->policies, $this->beforeCallbacks, $this->afterCallbacks
);
}
/**
* Resolve the user from the user resolver.
*
* @return mixed
*/
protected function resolveUser()
{
return call_user_func($this->userResolver);
}
/**
* Get all of the defined abilities.
*
* @return array
*/
public function abilities()
{
return $this->abilities;
}
/**
* Get all of the defined policies.
*
* @return array
*/
public function policies()
{
return $this->policies;
}
}