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<?php |
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namespace Metabor\Statemachine\Util; |
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use Metabor\Statemachine\Command; |
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use Metabor\Statemachine\State; |
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use Metabor\Statemachine\StateCollection; |
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use Metabor\Statemachine\Transition; |
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use MetaborStd\Statemachine\ConditionInterface; |
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use MetaborStd\Statemachine\StateCollectionInterface; |
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use MetaborStd\Statemachine\StateInterface; |
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use MetaborStd\Statemachine\TransitionInterface; |
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/** |
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* @author Oliver Tischlinger |
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*/ |
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class SetupHelper |
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{ |
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/** |
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* @var StateCollectionInterface |
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*/ |
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protected $stateCollection; |
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/** |
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* @param StateCollectionInterface $stateCollection |
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*/ |
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public function __construct(StateCollectionInterface $stateCollection) |
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{ |
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$this->stateCollection = $stateCollection; |
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} |
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/** |
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* @param $name |
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* |
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* @return \MetaborStd\Statemachine\StateInterface |
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* |
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* @throws \Exception |
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*/ |
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public function findOrCreateState($name) |
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{ |
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if (!$this->stateCollection->hasState($name)) { |
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if ($this->stateCollection instanceof StateCollection) { |
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$this->stateCollection->addState(new State($name)); |
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} else { |
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throw new \InvalidArgumentException('Overwrite this method to implement a different type!'); |
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} |
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} |
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return $this->stateCollection->getState($name); |
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} |
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/** |
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* @param StateInterface $sourceState |
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* @param StateInterface $targetState |
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* @param string $eventName |
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* @param ConditionInterface $condition |
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* |
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* @return TransitionInterface |
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*/ |
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protected function findTransition(StateInterface $sourceState, StateInterface $targetState, $eventName = null, ConditionInterface $condition = null) |
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{ |
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$conditionName = $condition ? $condition->getName() : null; |
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/* @var $transition TransitionInterface */ |
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foreach ($sourceState->getTransitions() as $transition) { |
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$hasSameTargetState = ($transition->getTargetState() === $targetState); |
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$hasSameCondition = ($transition->getConditionName() == $conditionName); |
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$hasSameEvent = ($transition->getEventName() == $eventName); |
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if ($hasSameTargetState && $hasSameCondition && $hasSameEvent) { |
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return $transition; |
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} |
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} |
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} |
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/** |
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* @param StateInterface $sourceState |
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* @param TransitionInterface $sourceTransition |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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protected function addTransition(StateInterface $sourceState, TransitionInterface $sourceTransition) |
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{ |
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if ($sourceState instanceof State) { |
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$sourceState->addTransition($sourceTransition); |
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} else { |
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throw new \InvalidArgumentException('Overwrite this method to implement a different type!'); |
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} |
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} |
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/** |
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* @param string $sourceStateName |
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* @param string $targetStateName |
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* @param string $eventName |
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* @param ConditionInterface $condition |
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* |
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* @return TransitionInterface |
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*/ |
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public function findOrCreateTransition($sourceStateName, $targetStateName, $eventName = null, ConditionInterface $condition = null) |
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{ |
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$sourceState = $this->findOrCreateState($sourceStateName); |
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$targetState = $this->findOrCreateState($targetStateName); |
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$transition = $this->findTransition($sourceState, $targetState, $eventName, $condition); |
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if (!$transition) { |
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$transition = new Transition($targetState, $eventName, $condition); |
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$this->addTransition($sourceState, $transition); |
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} |
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return $transition; |
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} |
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/** |
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* If there is no Transition from the SourceState with this Event use addCommandAndSelfTransition(). |
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* |
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* @param $sourceStateName |
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* @param string $eventName |
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* @param Command $command |
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*/ |
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public function addCommand($sourceStateName, $eventName, Command $command) |
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{ |
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$sourceState = $this->findOrCreateState($sourceStateName); |
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$sourceState->getEvent($eventName)->attach($command); |
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} |
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/** |
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* @param $sourceStateName |
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* @param string $eventName |
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* @param Command $command |
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*/ |
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public function addCommandAndSelfTransition($sourceStateName, $eventName, Command $command) |
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{ |
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$this->addCommand($sourceStateName, $eventName, $command); |
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$this->findOrCreateTransition($sourceStateName, $sourceStateName, $eventName); |
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} |
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} |
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Metabor /
Statemachine
