xobotyi /
emittr
| Total Complexity | 62 |
| Total Lines | 225 |
| Duplicated Lines | 0 % |
| Changes | 0 | ||
Complex classes like EventEmitterGlobal often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use EventEmitterGlobal, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 10 | final class EventEmitterGlobal implements Interfaces\EventEmitterGlobal |
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| 11 | { |
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| 12 | /** |
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| 13 | * @var \xobotyi\emittr\EventEmitterGlobal; |
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| 14 | */ |
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| 15 | private static $instance; |
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| 16 | |||
| 17 | private $listeners; |
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| 18 | |||
| 19 | private $maxListenersCount = 10; |
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| 20 | |||
| 21 | public static function getInstance() :self { |
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| 22 | if (!self::$instance) { |
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| 23 | self::$instance = new self(); |
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| 24 | } |
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| 25 | |||
| 26 | return self::$instance; |
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| 27 | } |
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| 28 | |||
| 29 | public static function propagateEvent(Event $event, array &$eventsListeners) :bool { |
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| 30 | $eventName = $event->getEventName(); |
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| 31 | |||
| 32 | if (empty($eventsListeners[$eventName])) { |
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| 33 | return true; |
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| 34 | } |
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| 35 | |||
| 36 | $listeners = &$eventsListeners[$eventName]; |
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| 37 | $result = true; |
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| 38 | |||
| 39 | foreach ($listeners as $key => &$listener) { |
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| 40 | if (in_array($eventName, [EventEmitter::EVENT_LISTENER_ADDED, EventEmitter::EVENT_LISTENER_REMOVED,]) && |
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| 41 | $event->getPayload()['callback'] && $event->getPayload()['callback'] === $listener[1]) { |
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| 42 | continue; |
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| 43 | } |
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| 44 | |||
| 45 | call_user_func($listener[1], $event); |
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| 46 | |||
| 47 | if ($listener[0]) { |
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| 48 | unset($listeners[$key]); |
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| 49 | } |
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| 50 | |||
| 51 | if (!$event->isPropagatable()) { |
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| 52 | $result = false; |
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| 53 | break; |
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| 54 | } |
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| 55 | } |
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| 56 | |||
| 57 | if (empty($listeners)) { |
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| 58 | unset($listeners); |
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| 59 | } |
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| 60 | |||
| 61 | return $result; |
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| 62 | } |
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| 63 | |||
| 64 | public static function isValidCallback($callback) :bool { |
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| 65 | return is_string($callback) || is_callable($callback) || (is_array($callback) && count($callback) === 2 && is_string($callback[0]) && is_string($callback[1])); |
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| 66 | } |
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| 67 | |||
| 68 | public static function storeCallback(array &$arrayToStore, string $eventName, $callback, int $maxListeners = 10, bool $once = false, bool $prepend = false) :void { |
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| 84 | } |
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| 85 | |||
| 86 | public function loadListeners(array $listeners) :self { |
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| 87 | foreach ($listeners as $className => &$classListeners) { |
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| 113 | } |
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| 114 | |||
| 115 | public function on(string $className, string $eventName, $callback) :self { |
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| 116 | if (!isset($this->listeners[$className][$eventName])) { |
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| 117 | $this->listeners[$className][$eventName] = []; |
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| 118 | } |
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| 119 | |||
| 120 | self::storeCallback($this->listeners[$className], $eventName, $callback, $this->maxListenersCount, false, false); |
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| 121 | |||
| 122 | return $this; |
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| 123 | } |
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| 124 | |||
| 125 | public function once(string $className, string $eventName, $callback) :self { |
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| 126 | if (!isset($this->listeners[$className][$eventName])) { |
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| 127 | $this->listeners[$className][$eventName] = []; |
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| 128 | } |
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| 129 | |||
| 130 | self::storeCallback($this->listeners[$className], $eventName, $callback, $this->maxListenersCount, true, false); |
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| 131 | |||
| 132 | return $this; |
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| 133 | } |
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| 134 | |||
| 135 | public function prependListener(string $className, string $eventName, $callback) :self { |
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| 143 | } |
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| 144 | |||
| 145 | public function prependOnceListener(string $className, string $eventName, $callback) :self { |
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| 146 | if (!isset($this->listeners[$className][$eventName])) { |
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| 147 | $this->listeners[$className][$eventName] = []; |
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| 148 | } |
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| 149 | |||
| 150 | self::storeCallback($this->listeners[$className], $eventName, $callback, $this->maxListenersCount, true, true); |
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| 151 | |||
| 152 | return $this; |
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| 153 | } |
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| 154 | |||
| 155 | public function off(string $className, string $eventName, $callback) :self { |
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| 156 | if (empty($this->listeners[$className][$eventName])) { |
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| 157 | return $this; |
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| 158 | } |
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| 159 | |||
| 160 | $this->listeners[$className][$eventName] = \array_values(\array_filter($this->listeners[$className][$eventName], function ($item) use (&$callback) { return $item[1] !== $callback; })); |
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| 161 | |||
| 162 | if (empty($this->listeners[$className][$eventName])) { |
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| 163 | unset($this->listeners[$className][$eventName]); |
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| 164 | } |
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| 165 | |||
| 166 | if (empty($this->listeners[$className])) { |
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| 167 | unset($this->listeners[$className]); |
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| 168 | } |
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| 169 | |||
| 170 | return $this; |
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| 171 | } |
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| 172 | |||
| 173 | public function removeAllListeners(?string $className = null, ?string $eventName = null) :self { |
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| 174 | if ($className === null) { |
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| 175 | $this->listeners = []; |
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| 176 | |||
| 177 | return $this; |
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| 178 | } |
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| 179 | |||
| 180 | if (empty($this->listeners[$className])) { |
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| 181 | return $this; |
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| 182 | } |
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| 183 | |||
| 184 | if ($eventName === null) { |
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| 185 | unset($this->listeners[$className]); |
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| 186 | |||
| 187 | return $this; |
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| 188 | } |
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| 189 | |||
| 190 | if (empty($this->listeners[$className][$eventName])) { |
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| 191 | return $this; |
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| 192 | } |
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| 193 | |||
| 194 | unset($this->listeners[$className][$eventName]); |
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| 195 | |||
| 196 | if (empty($this->listeners[$className])) { |
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| 197 | unset($this->listeners[$className]); |
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| 198 | } |
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| 199 | |||
| 200 | return $this; |
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| 201 | } |
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| 202 | |||
| 203 | public function getEventNames(string $className) :array { |
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| 204 | return empty($this->listeners[$className]) ? [] : \array_keys($this->listeners[$className]); |
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| 205 | } |
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| 206 | |||
| 207 | public function getListeners(?string $className = null, ?string $eventName = null) :array { |
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| 209 | } |
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| 210 | |||
| 211 | public function getMaxListenersCount() :int { |
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| 212 | return $this->maxListenersCount; |
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| 213 | } |
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| 214 | |||
| 215 | public function setMaxListenersCount(int $maxListenersCount) :self { |
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| 223 | } |
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| 224 | |||
| 225 | public function propagateEventGlobal(Event $event) :bool { |
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| 235 | } |
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| 236 | } |
