/**
* @param StateInterface $sourceState
* @param TransitionInterface $sourceTransition
*
* @throws \InvalidArgumentException
*/
protected function addTransition(StateInterface $sourceState, TransitionInterface $sourceTransition)
{
if ($sourceState instanceof State) {
$sourceState->addTransition($sourceTransition);
} else {
throw new \InvalidArgumentException('Overwrite this method to implement a different type!');
}
}
/**
* @param StateInterface $state
*/
protected function addState(StateInterface $state)
{
$name = $state->getName();
if ($this->states->hasState($name)) {
if ($this->states->getState($name) !== $state) {
throw new \Exception('There is already a different state with name "' . $name . '"');
}
} else {
$this->states->addState($state);
/* @var $transition TransitionInterface */
foreach ($state->getTransitions() as $transition) {
$targetState = $transition->getTargetState();
$this->addState($targetState);
}
}
}
/**
* @param DispatcherInterface $dispatcher
* @param string $name
* @param \ArrayAccess $context
*
* @throws \RuntimeException
*/
public function dispatchEvent(DispatcherInterface $dispatcher, $name, \ArrayAccess $context = null)
{
if ($this->dispatcher) {
throw new \RuntimeException('Event dispatching is still running!');
} else {
if ($this->currentState->hasEvent($name)) {
$this->dispatcher = $dispatcher;
if ($context) {
$this->currentContext = $context;
} else {
$this->currentContext = new \ArrayIterator(array());
}
$this->currentEvent = $this->currentState->getEvent($name);
$dispatcher->dispatch($this->currentEvent, array($this->subject, $this->currentContext), new Callback(array($this, 'onDispatcherReady')));
} else {
throw new \RuntimeException('Current state "' . $this->currentState->getName() . '" did not have event "' . $name . '"');
}
}
}
/**
* @param DispatcherInterface $dispatcher
* @param string $name
* @param \ArrayAccess $context
*
* @throws \RuntimeException
*/
public function dispatchEvent(DispatcherInterface $dispatcher, $name, \ArrayAccess $context = null)
{
if ($this->dispatcher) {
throw new \RuntimeException('Event dispatching is still running!');
} else {
if ($this->currentState->hasEvent($name)) {
$this->acquireLockOrThrowException();
$this->dispatcher = $dispatcher;
if ($context) {
$this->currentContext = $context;
} else {
$this->currentContext = new \ArrayIterator(array());
}
$this->currentEvent = $this->currentState->getEvent($name);
$dispatcher->dispatch($this->currentEvent, array($this->subject, $this->currentContext), new Callback(array($this, 'onDispatcherReady')));
} else {
throw new WrongEventForStateException($this->currentState->getName(), $name);
}
}
}
/**
* @param StateInterface $sourceState
*
* @throws \InvalidArgumentException
*/
protected function mergeState(StateInterface $sourceState)
{
$name = $sourceState->getName();
$targetState = $this->findOrCreateState($name);
$this->mergeMetadata($sourceState, $targetState);
/* @var $transition TransitionInterface */
foreach ($sourceState->getTransitions() as $sourceTransition) {
$targetTransition = $this->createTransition($sourceTransition);
$this->addTransition($targetState, $targetTransition);
}
foreach ($sourceState->getEventNames() as $eventName) {
$sourceEvent = $sourceState->getEvent($eventName);
$targetEvent = $targetState->getEvent($eventName);
$this->mergeMetadata($sourceEvent, $targetEvent);
foreach ($sourceEvent->getObservers() as $observer) {
$targetEvent->attach($observer);
}
}
}
/**
* @param TransitionInterface $transition
*
* @return string
*/
protected function getTransitionLabel(StateInterface $state, TransitionInterface $transition)
{
$labelParts = array();
$eventName = $transition->getEventName();
if ($eventName) {
$labelParts[] = 'E: ' . $eventName;
$event = $state->getEvent($eventName);
$observerName = $this->convertObserverToString($event);
if ($observerName) {
$labelParts[] = 'C: ' . $observerName;
}
}
$conditionName = $transition->getConditionName();
if ($conditionName) {
$labelParts[] = 'IF: ' . $conditionName;
}
if ($transition instanceof WeightedInterface) {
$labelParts[] = 'W: ' . $transition->getWeight();
}
$label = implode(PHP_EOL, $labelParts);
return $label;
}
/**
* @param StateInterface $sourceState
* @param string $eventName
*
* @return EventInterface
*/
public function createEvent(StateInterface $sourceState, $eventName)
{
if ($sourceState instanceof State) {
return $sourceState->getEvent($eventName);
} else {
throw new \InvalidArgumentException('Overwrite this method to implement a different type!');
}
}
/**
* @param TransitionInterface $transition
* @return string
*/
protected function getTransitionLabel(StateInterface $state, TransitionInterface $transition)
{
$labelParts = array();
$eventName = $transition->getEventName();
if ($eventName) {
$labelParts[] = 'E: ' . $eventName;
$event = $state->getEvent($eventName);
$observers = $event->getObservers();
$observerName = implode(', ', iterator_to_array($observers, false));
if ($observerName) {
$labelParts[] = 'C: ' . $observerName;
}
}
$conditionName = $transition->getConditionName();
if ($conditionName) {
$labelParts[] = 'IF: ' . $conditionName;
}
$label = implode(PHP_EOL, $labelParts);
return $label;
}