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<?php |
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/** |
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* Nucleus - XMPP Library for PHP |
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* |
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* Copyright (C) 2016, Some rights reserved. |
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* |
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* @author Kacper "Kadet" Donat <[email protected]> |
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* |
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* Contact with author: |
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* Xmpp: [email protected] |
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* E-mail: [email protected] |
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* |
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* From Kadet with love. |
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*/ |
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namespace Kadet\Xmpp\Utils; |
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/** |
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* Observable collection class. |
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* |
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* > means output |
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* |
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* ```php |
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* $collection = new ObservableCollection(); |
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* $collection->on('set', function($value, $key) { echo "New item[$key]: $value".PHP_EOL; }); |
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* $collection->on('remove', function($value, $key) { echo "Item removed[$key]: $value".PHP_EOL; }); |
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* $collection->on('empty', function() { echo "list empty".PHP_EOL }); |
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* |
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* $collection[] = "foo"; |
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* > New item[0]: foo |
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* $collection[] = "bar" |
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* > New item[1]: bar |
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* unset($collection[1]); |
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* > Item removed[1]: bar |
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* $collection["dead"] = "beef" |
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* > New item[dead]: deadbeef |
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* |
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* echo count($collection).PHP_EOL; |
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* > 2 |
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* |
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* unset($collection[0]); |
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* > Item removed[0]: foo |
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* unset($collection['dead']); |
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* > Item removed[dead]: beed |
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* > List empty |
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* ``` |
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* |
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* @event empty() Collection was emptied |
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* @event set($value, $key) Item was added to collection |
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* @event remove($value, $key) Item was removed from collection |
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* |
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* @package Kadet\Xmpp\Utils |
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*/ |
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class ObservableCollection extends \ArrayObject |
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{ |
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use BetterEmitter; |
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/** |
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* Sets the value at the specified index to newval |
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* @link http://php.net/manual/en/arrayobject.offsetset.php |
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* @param mixed $index <p> |
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* The index being set. |
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* </p> |
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* @param mixed $value <p> |
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* The new value for the <i>index</i>. |
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* </p> |
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* @return void |
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* @since 5.0.0 |
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*/ |
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public function offsetSet($index, $value) |
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{ |
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parent::offsetSet($index, $value); |
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$this->emit('set', [ $value, $index ]); |
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} |
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/** |
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* Unsets the value at the specified index |
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* @link http://php.net/manual/en/arrayobject.offsetunset.php |
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* @param mixed $index <p> |
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* The index being unset. |
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* </p> |
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* @return void |
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* @since 5.0.0 |
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*/ |
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public function offsetUnset($index) |
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{ |
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$this->emit('remove', [ $this[$index], $index ]); |
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parent::offsetUnset($index); |
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if(!count($this)) { |
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$this->emit('empty'); |
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} |
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} |
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public function __destruct() |
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{ |
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$this->emit('empty'); |
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} |
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} |
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kadet1090 /
nucleus
