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87 | office | 1 | <?php |
2 | |||
3 | namespace GuzzleHttp\Event; |
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4 | |||
5 | /** |
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6 | * Guzzle event emitter. |
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7 | * |
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8 | * Some of this class is based on the Symfony EventDispatcher component, which |
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9 | * ships with the following license: |
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10 | * |
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11 | * This file is part of the Symfony package. |
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12 | * |
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13 | * (c) Fabien Potencier <fabien@symfony.com> |
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14 | * |
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15 | * For the full copyright and license information, please view the LICENSE |
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16 | * file that was distributed with this source code. |
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17 | * |
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18 | * @link https://github.com/symfony/symfony/tree/master/src/Symfony/Component/EventDispatcher |
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19 | */ |
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20 | class Emitter implements EmitterInterface |
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21 | { |
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22 | /** @var array */ |
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23 | private $listeners = []; |
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24 | |||
25 | /** @var array */ |
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26 | private $sorted = []; |
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27 | |||
28 | public function on($eventName, callable $listener, $priority = 0) |
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29 | { |
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30 | if ($priority === 'first') { |
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31 | $priority = isset($this->listeners[$eventName]) |
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32 | ? max(array_keys($this->listeners[$eventName])) + 1 |
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33 | : 1; |
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34 | } elseif ($priority === 'last') { |
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35 | $priority = isset($this->listeners[$eventName]) |
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36 | ? min(array_keys($this->listeners[$eventName])) - 1 |
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37 | : -1; |
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38 | } |
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39 | |||
40 | $this->listeners[$eventName][$priority][] = $listener; |
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41 | unset($this->sorted[$eventName]); |
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42 | } |
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43 | |||
44 | public function once($eventName, callable $listener, $priority = 0) |
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45 | { |
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46 | $onceListener = function ( |
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47 | EventInterface $event, |
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48 | $eventName |
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49 | ) use (&$onceListener, $eventName, $listener, $priority) { |
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50 | $this->removeListener($eventName, $onceListener); |
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51 | $listener($event, $eventName, $this); |
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52 | }; |
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53 | |||
54 | $this->on($eventName, $onceListener, $priority); |
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55 | } |
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56 | |||
57 | public function removeListener($eventName, callable $listener) |
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58 | { |
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59 | if (!isset($this->listeners[$eventName])) { |
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60 | return; |
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61 | } |
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62 | |||
63 | foreach ($this->listeners[$eventName] as $priority => $listeners) { |
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64 | if (false !== ($key = array_search($listener, $listeners, true))) { |
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65 | unset( |
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66 | $this->listeners[$eventName][$priority][$key], |
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67 | $this->sorted[$eventName] |
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68 | ); |
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69 | } |
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70 | } |
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71 | } |
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72 | |||
73 | public function listeners($eventName = null) |
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74 | { |
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75 | // Return all events in a sorted priority order |
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76 | if ($eventName === null) { |
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77 | foreach (array_keys($this->listeners) as $eventName) { |
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78 | if (!isset($this->sorted[$eventName])) { |
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79 | $this->listeners($eventName); |
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80 | } |
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81 | } |
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82 | return $this->sorted; |
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83 | } |
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84 | |||
85 | // Return the listeners for a specific event, sorted in priority order |
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86 | if (!isset($this->sorted[$eventName])) { |
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87 | if (!isset($this->listeners[$eventName])) { |
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88 | return []; |
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89 | } else { |
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90 | krsort($this->listeners[$eventName]); |
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91 | $this->sorted[$eventName] = call_user_func_array( |
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92 | 'array_merge', |
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93 | $this->listeners[$eventName] |
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94 | ); |
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95 | } |
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96 | } |
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97 | |||
98 | return $this->sorted[$eventName]; |
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99 | } |
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100 | |||
101 | public function emit($eventName, EventInterface $event) |
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102 | { |
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103 | if (isset($this->listeners[$eventName])) { |
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104 | foreach ($this->listeners($eventName) as $listener) { |
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105 | $listener($event, $eventName); |
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106 | if ($event->isPropagationStopped()) { |
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107 | break; |
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108 | } |
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109 | } |
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110 | } |
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111 | |||
112 | return $event; |
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113 | } |
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114 | |||
115 | public function attach(SubscriberInterface $subscriber) |
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116 | { |
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117 | foreach ($subscriber->getEvents() as $eventName => $listeners) { |
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118 | if (is_array($listeners[0])) { |
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119 | foreach ($listeners as $listener) { |
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120 | $this->on( |
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121 | $eventName, |
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122 | [$subscriber, $listener[0]], |
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123 | isset($listener[1]) ? $listener[1] : 0 |
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124 | ); |
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125 | } |
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126 | } else { |
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127 | $this->on( |
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128 | $eventName, |
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129 | [$subscriber, $listeners[0]], |
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130 | isset($listeners[1]) ? $listeners[1] : 0 |
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131 | ); |
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132 | } |
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133 | } |
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134 | } |
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135 | |||
136 | public function detach(SubscriberInterface $subscriber) |
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137 | { |
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138 | foreach ($subscriber->getEvents() as $eventName => $listener) { |
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139 | $this->removeListener($eventName, array($subscriber, $listener[0])); |
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140 | } |
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141 | } |
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142 | |||
143 | public function __call($name, $arguments) |
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144 | { |
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145 | return \GuzzleHttp\deprecation_proxy( |
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146 | $this, |
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147 | $name, |
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148 | $arguments, |
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149 | [ |
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150 | 'addSubscriber' => 'attach', |
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151 | 'removeSubscriber' => 'detach', |
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152 | 'addListener' => 'on', |
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153 | 'dispatch' => 'emit' |
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154 | ] |
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155 | ); |
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156 | } |
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157 | } |