PHP code example of konsulting / fluent-state-machine

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

konsulting / fluent-state-machine example snippets

    use Konsulting\StateMachine\StateMachine;

    $door = new StateMachine(['closed', 'open'])
        ->addTransition('open')->from('closed')->to('open')
        ->addTransition('close')->from('open')->to('closed');

    $door->transition('open'); // will complete successfully

    $door->transition('close'); // will throw a TransitionFailed Exception

    $door->can('open'); // returns true

    $door->can('close'); // returns false

    use Konsulting\StateMachine\StateMachine;

    $simpleDoor = new SimpleDoor();

    $sm = new StateMachine(['closed', 'open'])
        ->setModel($state)
        ->addTransition('open')->from('closed')->to('open')
        ->addTransition('close')->from('open')->to('closed');

    $sm->transition('open');     // outputs opening
    echo $sm->getCurrentState(); // outputs open
    $sm->transition('close');    // outputs closing
    echo $sm->getCurrentState(); // outputs closed

    class SimpleDoor
    {
        public function open()
        {
            echo "opening";
        }

        public function close()
        {
            echo "closing";
        }
    }

    $door = new Door('closed');

    $door->close(); // throws TransitionFailed Exception.

    $door->open();  // outputs "I am opening"
    $door->close(); // outputs "I am closing"

class Door
{
    public    $state;
    protected $stateMachine;

    public function __construct($state)
    {
        $this->state = $state;
        $this->stateMachine = new AttachedStateMachine($this);
    }

    public function open()
    {
        $this->stateMachine->transition('open', function () {
            echo "I am opening";
        });
    }

    public function close()
    {
        $this->stateMachine->transition('close', function () {
             echo "I am closing";
        });
    }
}

use Konsulting\StateMachine\AttachableStateMachine;
use Konsulting\StateMachine\StateMachine;
use Konsulting\StateMachine\TransitionFactory;
use Konsulting\StateMachine\Transitions;

class AttachedStateMachine extends AttachableStateMachine
{
    protected function define()
    {
        $transitionFactory = (new TransitionFactory)->useDefaultCall(false);
        $transitions = new Transitions($transitionFactory);

        $this->setTransitions($transitions)
            ->setStates(['closed', 'open'])
            ->setCurrentState($this->model->state ?? 'closed')
            ->addTransition('open')->from('closed')->to('open')
            ->addTransition('close')->from('open')->to('closed');
    }

    public function setCurrentState($state)
    {
        if ($this->model) {
            $this->model->state = $state;
        }

        return parent::setCurrentState($state);
    }
}