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<?php |
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/** |
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* Config watching |
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* User: moyo |
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* Date: 18/10/2017 |
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* Time: 3:30 PM |
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*/ |
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namespace Carno\Config\Chips; |
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use Closure; |
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use Throwable; |
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trait Watching |
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{ |
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/** |
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* @var array |
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*/ |
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private $observer = []; |
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/** |
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* @var array |
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*/ |
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private $replicator = []; |
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/** |
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* @var array |
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*/ |
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private $watching = []; |
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/** |
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* @param string $key |
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* @param Closure $observer |
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* @return string |
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*/ |
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public function watching(string $key, Closure $observer) : string |
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{ |
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$wid = spl_object_hash($observer); |
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if ($key === '*') { |
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$this->replicator[$wid] = $observer; |
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} else { |
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$this->observer[$key][$wid] = $observer; |
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$this->watching[$wid][] = $key; |
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// trigger notify immediate if value already exists |
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if ($this->has($key)) { |
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$this->cbPerforming($observer, $key, $this->get($key)); |
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} |
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} |
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return $wid; |
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} |
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/** |
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* @param string $wid |
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*/ |
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public function unwatch(string $wid) : void |
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{ |
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foreach ($this->watching[$wid] ?? [] as $key) { |
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unset($this->observer[$key][$wid]); |
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} |
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unset($this->watching[$wid]); |
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unset($this->replicator[$wid]); |
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} |
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/** |
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* @param string $key |
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* @param $new |
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*/ |
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protected function wkChanged(string $key, $new) : void |
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{ |
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foreach ($this->observer[$key] ?? [] as $watcher) { |
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$this->cbPerforming($watcher, $key, $new); |
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} |
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foreach ($this->replicator as $receiver) { |
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$this->cbPerforming($receiver, $key, $new); |
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} |
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} |
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/** |
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* @param Closure $program |
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* @param string $key |
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* @param $value |
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*/ |
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private function cbPerforming(Closure $program, string $key, $value) : void |
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{ |
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try { |
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call_user_func_array($program, [$value, $key]); |
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} catch (Throwable $e) { |
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// do some thing |
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} |
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} |
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} |
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carno-php /
config
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