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<?php |
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/** |
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* Linna Framework. |
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* |
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* @author Sebastian Rapetti <[email protected]> |
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* @copyright (c) 2017, Sebastian Rapetti |
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* @license http://opensource.org/licenses/MIT MIT License |
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*/ |
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declare(strict_types=1); |
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namespace Linna\Mvc; |
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/** |
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* Parent class for model classes. |
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* |
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* This class was implemented like part of Observer pattern |
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* https://en.wikipedia.org/wiki/Observer_pattern |
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* http://php.net/manual/en/class.splsubject.php |
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*/ |
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class Model implements \SplSubject |
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{ |
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/** |
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* @var object List of attached observerer |
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*/ |
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private $observers; |
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/** |
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* @var array Data for notify to observerer |
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*/ |
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private $updates = []; |
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/** |
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* Constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->observers = new \SplObjectStorage(); |
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} |
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/** |
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* Attach an Observer class to this Subject for updates |
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* when occour a subject state change. |
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* |
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* @param \SplObserver $observer |
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*/ |
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public function attach(\SplObserver $observer) |
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{ |
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if ($observer instanceof View) { |
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$this->observers->attach($observer); |
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} |
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} |
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/** |
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* Detach an Observer class from this Subject. |
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* |
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* @param \SplObserver $observer |
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*/ |
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public function detach(\SplObserver $observer) |
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{ |
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if ($observer instanceof View) { |
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$this->observers->detach($observer); |
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} |
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} |
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/** |
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* Notify a state change of Subject to all registered Observeres. |
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*/ |
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public function notify() |
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{ |
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foreach ($this->observers as $value) { |
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$value->update($this); |
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} |
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} |
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/** |
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* Set the data to notify to all registered Observeres. |
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* |
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* @param array $data |
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*/ |
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public function set(array $data) |
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{ |
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$this->updates = array_merge_recursive($this->updates, $data); |
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} |
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/** |
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* Get the data to notify to all registered Observeres. |
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* |
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* @return array |
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*/ |
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public function get() : array |
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{ |
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return $this->updates; |
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} |
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} |
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linna /
framework
