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<?php |
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declare(strict_types=1); |
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namespace League\Event; |
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use const SORT_NUMERIC; |
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/** |
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* @internal |
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*/ |
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class PrioritizedListenersForEvent |
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{ |
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/** @var array<int, array<int,callable>> */ |
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private $listeners = []; |
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/** @var array<int,callable> */ |
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private $sortedListeners = []; |
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/** @var bool */ |
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private $isSorted = false; |
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/** @var bool */ |
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private $containsOneTimeListener = false; |
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public function addListener(callable $listener, int $priority): void |
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{ |
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$this->isSorted = false; |
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$this->listeners[$priority][] = $listener; |
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if ($listener instanceof OneTimeListener) { |
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$this->containsOneTimeListener = true; |
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} |
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} |
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public function getListeners(): iterable |
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{ |
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if ($this->isSorted === false) { |
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$this->sortListeners(); |
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} |
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$listeners = $this->sortedListeners; |
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if ($this->containsOneTimeListener) { |
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$this->removeOneTimeListeners(); |
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} |
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return $listeners; |
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} |
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private function sortListeners(): void |
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{ |
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$this->isSorted = true; |
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krsort($this->listeners, SORT_NUMERIC); |
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foreach ($this->listeners as $group) { |
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foreach ($group as $listener) { |
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$this->sortedListeners[] = $listener; |
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} |
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} |
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} |
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private function removeOneTimeListeners(): void |
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{ |
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$filter = static function ($listener): bool { |
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return $listener instanceof OneTimeListener === false; |
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}; |
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$this->sortedListeners = array_filter($this->sortedListeners, $filter); |
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foreach ($this->listeners as $priority => $listeners) { |
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$this->listeners[$priority] = array_filter($this->sortedListeners, $filter); |
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} |
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} |
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} |
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thephpleague /
event
