| 148 |
lars |
1 |
<?php
|
|
|
2 |
|
|
|
3 |
namespace Illuminate\Support\Traits;
|
|
|
4 |
|
|
|
5 |
use Closure;
|
|
|
6 |
use Illuminate\Support\Reflector;
|
|
|
7 |
use ReflectionFunction;
|
|
|
8 |
use RuntimeException;
|
|
|
9 |
|
|
|
10 |
trait ReflectsClosures
|
|
|
11 |
{
|
|
|
12 |
/**
|
|
|
13 |
* Get the class name of the first parameter of the given Closure.
|
|
|
14 |
*
|
|
|
15 |
* @param \Closure $closure
|
|
|
16 |
* @return string
|
|
|
17 |
*
|
|
|
18 |
* @throws \ReflectionException
|
|
|
19 |
* @throws \RuntimeException
|
|
|
20 |
*/
|
|
|
21 |
protected function firstClosureParameterType(Closure $closure)
|
|
|
22 |
{
|
|
|
23 |
$types = array_values($this->closureParameterTypes($closure));
|
|
|
24 |
|
|
|
25 |
if (! $types) {
|
|
|
26 |
throw new RuntimeException('The given Closure has no parameters.');
|
|
|
27 |
}
|
|
|
28 |
|
|
|
29 |
if ($types[0] === null) {
|
|
|
30 |
throw new RuntimeException('The first parameter of the given Closure is missing a type hint.');
|
|
|
31 |
}
|
|
|
32 |
|
|
|
33 |
return $types[0];
|
|
|
34 |
}
|
|
|
35 |
|
|
|
36 |
/**
|
|
|
37 |
* Get the class names of the first parameter of the given Closure, including union types.
|
|
|
38 |
*
|
|
|
39 |
* @param \Closure $closure
|
|
|
40 |
* @return array
|
|
|
41 |
*
|
|
|
42 |
* @throws \ReflectionException
|
|
|
43 |
* @throws \RuntimeException
|
|
|
44 |
*/
|
|
|
45 |
protected function firstClosureParameterTypes(Closure $closure)
|
|
|
46 |
{
|
|
|
47 |
$reflection = new ReflectionFunction($closure);
|
|
|
48 |
|
|
|
49 |
$types = collect($reflection->getParameters())->mapWithKeys(function ($parameter) {
|
|
|
50 |
if ($parameter->isVariadic()) {
|
|
|
51 |
return [$parameter->getName() => null];
|
|
|
52 |
}
|
|
|
53 |
|
|
|
54 |
return [$parameter->getName() => Reflector::getParameterClassNames($parameter)];
|
|
|
55 |
})->filter()->values()->all();
|
|
|
56 |
|
|
|
57 |
if (empty($types)) {
|
|
|
58 |
throw new RuntimeException('The given Closure has no parameters.');
|
|
|
59 |
}
|
|
|
60 |
|
|
|
61 |
if (isset($types[0]) && empty($types[0])) {
|
|
|
62 |
throw new RuntimeException('The first parameter of the given Closure is missing a type hint.');
|
|
|
63 |
}
|
|
|
64 |
|
|
|
65 |
return $types[0];
|
|
|
66 |
}
|
|
|
67 |
|
|
|
68 |
/**
|
|
|
69 |
* Get the class names / types of the parameters of the given Closure.
|
|
|
70 |
*
|
|
|
71 |
* @param \Closure $closure
|
|
|
72 |
* @return array
|
|
|
73 |
*
|
|
|
74 |
* @throws \ReflectionException
|
|
|
75 |
*/
|
|
|
76 |
protected function closureParameterTypes(Closure $closure)
|
|
|
77 |
{
|
|
|
78 |
$reflection = new ReflectionFunction($closure);
|
|
|
79 |
|
|
|
80 |
return collect($reflection->getParameters())->mapWithKeys(function ($parameter) {
|
|
|
81 |
if ($parameter->isVariadic()) {
|
|
|
82 |
return [$parameter->getName() => null];
|
|
|
83 |
}
|
|
|
84 |
|
|
|
85 |
return [$parameter->getName() => Reflector::getParameterClassName($parameter)];
|
|
|
86 |
})->all();
|
|
|
87 |
}
|
|
|
88 |
}
|