/**
* @see \MetaborStd\Statemachine\Factory\TransitionSelectorInterface::selectTransition()
*/
public function selectTransition(\Traversable $transitions)
{
$bestTransitions = array();
$bestScore = -1;
foreach ($transitions as $transition) {
$score = $this->calculcateScore($transition);
if ($score > $bestScore) {
$bestScore = $score;
$bestTransitions = array($transition);
} elseif ($score == $bestScore) {
$bestTransitions[] = $transition;
}
}
return $this->innerSelector->selectTransition(new \ArrayIterator($bestTransitions));
}
/**
* @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);
}
}
/**
* @see \MetaborStd\Statemachine\Factory\TransitionSelectorInterface::selectTransition()
*/
public function selectTransition(\Traversable $transitions)
{
$bestTransitions = array();
$bestWeight = null;
foreach ($transitions as $transition) {
if ($transition instanceof WeightedInterface) {
$weight = $transition->getWeight();
$diff = $weight - $bestWeight;
if ($bestWeight === null || $diff >= $this->epsilon) {
$bestWeight = $weight;
$bestTransitions = array($transition);
} elseif (abs($diff) < $this->epsilon) {
$bestTransitions[] = $transition;
}
}
}
return $this->innerSelector->selectTransition(new \ArrayIterator($bestTransitions));
}
/**
*
* @param ArrayAccess $context
* @param EventInterface $event
*/
protected function doCheckTransitions(ArrayAccess $context, EventInterface $event = null)
{
$transitions = $this->currentState->getTransitions();
$activeTransitions = new ActiveTransitionFilter($transitions, $this->getSubject(), $context, $event);
$this->selectedTransition = $this->transitonSelector->selectTransition($activeTransitions);
if ($this->selectedTransition) {
$this->beforeTransition($this->getSubject(), $this->selectedTransition->getTargetState()->getName());
$this->currentState = $this->selectedTransition->getTargetState();
$this->notify();
$this->selectedTransition = null;
$this->checkTransitions();
}
}
