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<?php |
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/** |
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* @license LGPLv3, http://opensource.org/licenses/LGPL-3.0 |
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* @copyright Aimeos (aimeos.org), 2019 |
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* @package MW |
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* @subpackage Observer |
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*/ |
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namespace Aimeos\MW\Observer\Publisher; |
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/** |
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* Default implementation of a publisher in the observer pattern |
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* |
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* @package MW |
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* @subpackage Observer |
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*/ |
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trait Traits |
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{ |
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protected $listeners = []; |
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/** |
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* Adds a listener object to the publisher. |
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* |
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* @param \Aimeos\MW\Observer\Listener\Iface $l Object implementing listener interface |
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* @param string $action Name of the action to listen for |
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* @return \Aimeos\MW\Observer\Publisher\Iface Publisher object for method chaining |
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*/ |
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public function attach( \Aimeos\MW\Observer\Listener\Iface $l, $action ) |
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{ |
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$this->listeners[$action][] = $l; |
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return $this; |
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} |
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/** |
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* Removes a listener from the publisher object. |
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* |
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* @param \Aimeos\MW\Observer\Listener\Iface $l Object implementing listener interface |
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* @param string $action Name of the action to remove the listener from |
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* @return \Aimeos\MW\Observer\Publisher\Iface Publisher object for method chaining |
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*/ |
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public function detach( \Aimeos\MW\Observer\Listener\Iface $l, $action ) |
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{ |
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if( isset( $this->listeners[$action] ) ) |
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{ |
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foreach( $this->listeners[$action] as $key => $listener ) |
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{ |
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if( $listener === $l ) { |
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unset( $this->listeners[$action][$key] ); |
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} |
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} |
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} |
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return $this; |
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} |
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/** |
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* Removes all attached listeners from the publisher |
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* |
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* @return \Aimeos\MW\Observer\Publisher\Iface Publisher object for method chaining |
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*/ |
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public function off() |
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{ |
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$this->listeners = []; |
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return $this; |
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} |
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/** |
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* Sends updates to all listeners of the given action. |
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* |
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* @param string $action Name of the action |
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* @param mixed $value Value or object given to the listeners |
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* @return mixed Modified value parameter |
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*/ |
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protected function notify( $action, $value = null ) |
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{ |
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if( isset( $this->listeners[$action] ) ) |
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{ |
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foreach( $this->listeners[$action] as $key => $listener ) { |
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$value = $listener->update( $this, $action, $value ); |
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} |
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} |
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return $value; |
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} |
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} |
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aimeos /
aimeos-core
