/**
* @see MetaborStd\Statemachine.TransitionInterface::isActive()
*/
public function isActive($subject, \ArrayAccess $context, EventInterface $event = null)
{
if ($event) {
$result = $event->getName() == $this->eventName;
} else {
$result = is_null($this->eventName);
}
if ($this->condition) {
$result = $result && $this->condition->checkCondition($subject, $context);
}
return $result;
}
/**
* @param \ArrayAccess $context
* @param EventInterface $event
*/
protected function doCheckTransitions(\ArrayAccess $context, EventInterface $event = null)
{
try {
$transitions = $this->currentState->getTransitions();
$activeTransitions = new ActiveTransitionFilter($transitions, $this->getSubject(), $context, $event);
$this->selectedTransition = $this->transitonSelector->selectTransition($activeTransitions);
if ($this->selectedTransition) {
$targetState = $this->selectedTransition->getTargetState();
if ($this->currentState != $targetState) {
$this->lastState = $this->currentState;
$this->currentState = $targetState;
$this->notify();
$this->selectedTransition = null;
$this->lastState = null;
}
$this->checkTransitions();
}
} catch (\Exception $exception) {
$message = 'Exception was thrown when doing a transition from current state "' . $this->currentState->getName() . '"';
if ($this->currentEvent instanceof NamedInterface) {
$message .= ' with event "' . $this->currentEvent->getName() . '"';
}
throw new \RuntimeException($message, 0, $exception);
}
}
/**
* @param EventInterface $event
* @param callable $command
*/
protected function addCommand(EventInterface $event, $command)
{
$callback = new Callback($command);
$observer = new ObserverCallback($callback);
$event->attach($observer);
}
/**
* @param EventInterface $event
*
* @return string
*/
protected function convertObserverToString(EventInterface $event)
{
$observers = array();
foreach ($event->getObservers() as $observer) {
$observers[] = $this->stringConverter->convertToString($observer);
}
return implode(', ', $observers);
}
