/**
* Build event command collection
*
* @param array $event
*
* @return CommandCollection
*/
private function buildCommands($event)
{
$collection = new CommandCollection();
foreach ($this->getOffsetFromArray($event, 'commands', []) as $command) {
$collection->add($command);
}
$collection->resetStatus();
return $collection;
}
/**
* Triggers event and return next state name or null if there is no state change
*
* @param PayloadInterface $payload
*
* @return string
*/
public function trigger(PayloadInterface $payload)
{
return $this->commands->execute($payload) ? $this->getTargetState() : $this->getErrorState();
}