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1 | <?php |
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2 | |||
3 | declare(strict_types=1); |
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4 | |||
5 | namespace Http\Client\Common; |
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6 | |||
7 | use Http\Promise\Promise; |
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8 | use Psr\Http\Client\ClientExceptionInterface; |
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9 | use Psr\Http\Message\ResponseInterface; |
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10 | |||
11 | /** |
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12 | * A deferred allow to return a promise which has not been resolved yet. |
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13 | */ |
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14 | final class Deferred implements Promise |
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15 | { |
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16 | /** |
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17 | * @var ResponseInterface|null |
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18 | */ |
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19 | private $value; |
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20 | |||
21 | /** |
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22 | * @var ClientExceptionInterface|null |
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23 | */ |
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24 | private $failure; |
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25 | |||
26 | /** |
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27 | * @var string |
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28 | */ |
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29 | private $state; |
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30 | |||
31 | /** |
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32 | * @var callable |
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33 | */ |
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34 | private $waitCallback; |
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35 | |||
36 | /** |
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37 | * @var callable[] |
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38 | */ |
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39 | private $onFulfilledCallbacks; |
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40 | |||
41 | /** |
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42 | * @var callable[] |
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43 | */ |
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44 | private $onRejectedCallbacks; |
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45 | |||
46 | public function __construct(callable $waitCallback) |
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47 | { |
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48 | $this->waitCallback = $waitCallback; |
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49 | $this->state = Promise::PENDING; |
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50 | $this->onFulfilledCallbacks = []; |
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51 | $this->onRejectedCallbacks = []; |
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52 | } |
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53 | |||
54 | /** |
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55 | * {@inheritdoc} |
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56 | */ |
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57 | public function then(callable $onFulfilled = null, callable $onRejected = null): Promise |
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58 | { |
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59 | $deferred = new self($this->waitCallback); |
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60 | |||
61 | View Code Duplication | $this->onFulfilledCallbacks[] = function (ResponseInterface $response) use ($onFulfilled, $deferred) { |
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62 | try { |
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63 | if (null !== $onFulfilled) { |
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64 | $response = $onFulfilled($response); |
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65 | } |
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66 | $deferred->resolve($response); |
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67 | } catch (ClientExceptionInterface $exception) { |
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68 | $deferred->reject($exception); |
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69 | } |
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70 | }; |
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71 | |||
72 | View Code Duplication | $this->onRejectedCallbacks[] = function (ClientExceptionInterface $exception) use ($onRejected, $deferred) { |
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73 | try { |
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74 | if (null !== $onRejected) { |
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75 | $response = $onRejected($exception); |
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76 | $deferred->resolve($response); |
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77 | |||
78 | return; |
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79 | } |
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80 | $deferred->reject($exception); |
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81 | } catch (ClientExceptionInterface $newException) { |
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82 | $deferred->reject($newException); |
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83 | } |
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84 | }; |
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85 | |||
86 | return $deferred; |
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87 | } |
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88 | |||
89 | /** |
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90 | * {@inheritdoc} |
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91 | */ |
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92 | public function getState(): string |
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93 | { |
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94 | return $this->state; |
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95 | } |
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96 | |||
97 | /** |
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98 | * Resolve this deferred with a Response. |
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99 | */ |
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100 | public function resolve(ResponseInterface $response): void |
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101 | { |
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102 | if (Promise::PENDING !== $this->state) { |
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103 | return; |
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104 | } |
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105 | |||
106 | $this->value = $response; |
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107 | $this->state = Promise::FULFILLED; |
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108 | |||
109 | foreach ($this->onFulfilledCallbacks as $onFulfilledCallback) { |
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110 | $onFulfilledCallback($response); |
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111 | } |
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112 | } |
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113 | |||
114 | /** |
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115 | * Reject this deferred with an Exception. |
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116 | */ |
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117 | public function reject(ClientExceptionInterface $exception): void |
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118 | { |
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119 | if (Promise::PENDING !== $this->state) { |
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120 | return; |
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121 | } |
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122 | |||
123 | $this->failure = $exception; |
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124 | $this->state = Promise::REJECTED; |
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125 | |||
126 | foreach ($this->onRejectedCallbacks as $onRejectedCallback) { |
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127 | $onRejectedCallback($exception); |
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128 | } |
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129 | } |
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130 | |||
131 | /** |
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132 | * {@inheritdoc} |
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133 | */ |
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134 | public function wait($unwrap = true) |
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135 | { |
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136 | if (Promise::PENDING === $this->state) { |
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137 | $callback = $this->waitCallback; |
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138 | $callback(); |
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139 | } |
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140 | |||
141 | if (!$unwrap) { |
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142 | return null; |
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143 | } |
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144 | |||
145 | if (Promise::FULFILLED === $this->state) { |
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146 | return $this->value; |
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147 | } |
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148 | |||
149 | /** @var ClientExceptionInterface */ |
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150 | throw $this->failure; |
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151 | } |
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152 | } |
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153 |
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.