Metabor\Statemachine\Observer\OnEnterObserver

Complexity

Total Complexity

6

Size/Duplication

Total Lines	41
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	3

Test Coverage

Coverage

100%

Importance

Changes	3
Bugs	0	Features	1

3 Methods

Rating	Name	Duplication	Size	Complexity
A	update()	0	6	3
A	__construct()	0	4	1
A	getStateMachineContext()	0	9	2

<?php

namespace Metabor\Statemachine\Observer;

use Metabor\Statemachine\Statemachine;
use MetaborStd\Statemachine\StatemachineInterface;

/**
 * Triggers automatically an event if the status changes and the new status has it.
 *
 * @author otischlinger
 */
class OnEnterObserver implements \SplObserver
{
    const DEFAULT_EVENT_NAME = 'onEnter';

    /**
     * @var string
     */
    private $eventName;

    /**
     * @param string $eventName
     */
    public function __construct($eventName = self::DEFAULT_EVENT_NAME)
    {
        $this->eventName = $eventName;
    }

    /**
     * @see SplObserver::update()
     */
    public function update(\SplSubject $stateMachine)
    {
        if ($stateMachine instanceof StatemachineInterface && $stateMachine->getCurrentState()->hasEvent($this->eventName)) {
            $stateMachine->triggerEvent($this->eventName, $this->getStateMachineContext($stateMachine));
        }
    }

    /**
     * @param \SplSubject|StatemachineInterface|Statemachine $stateMachine
     * @return \ArrayAccess|null
     */
    private function getStateMachineContext($stateMachine)
    {
        $context = null;
        if ($stateMachine instanceof Statemachine) {
            $context = $stateMachine->getCurrentContext();
        }

        return $context;
    }
}