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<?php |
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namespace Finite\Loader; |
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use Finite\Event\CallbackHandler; |
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use Finite\State\Accessor\PropertyPathStateAccessor; |
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use Finite\StateMachine\StateMachineInterface; |
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use Finite\State\State; |
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use Finite\State\StateInterface; |
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use Finite\Transition\Transition; |
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use Symfony\Component\OptionsResolver\Options; |
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use Symfony\Component\OptionsResolver\OptionsResolver; |
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/** |
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* Loads a StateMachine from an array |
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* |
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* @author Yohan Giarelli <[email protected]> |
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*/ |
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class ArrayLoader implements LoaderInterface |
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{ |
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/** |
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* @var array |
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*/ |
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private $config; |
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/** |
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* @var CallbackHandler |
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*/ |
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private $callbackHandler; |
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/** |
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* @param array $config |
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* @param CallbackHandler $handler |
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*/ |
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public function __construct(array $config, CallbackHandler $handler = null) |
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{ |
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$this->callbackHandler = $handler; |
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$this->config = array_merge( |
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array( |
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'class' => '', |
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'graph' => 'default', |
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'property_path' => 'finiteState', |
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'states' => array(), |
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'transitions' => array(), |
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), |
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$config |
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); |
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} |
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/** |
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* @{inheritDoc} |
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*/ |
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public function load(StateMachineInterface $stateMachine) |
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{ |
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if (null === $this->callbackHandler) { |
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$this->callbackHandler = new CallbackHandler($stateMachine->getDispatcher()); |
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} |
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$stateMachine->setStateAccessor(new PropertyPathStateAccessor($this->config['property_path'])); |
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$stateMachine->setGraph($this->config['graph']); |
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$this->loadStates($stateMachine); |
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$this->loadTransitions($stateMachine); |
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$this->loadCallbacks($stateMachine); |
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} |
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/** |
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* @{inheritDoc} |
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*/ |
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public function supports($object, $graph = 'default') |
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{ |
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$reflection = new \ReflectionClass($this->config['class']); |
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return $reflection->isInstance($object) && $graph === $this->config['graph']; |
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} |
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/** |
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* @param StateMachineInterface $stateMachine |
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*/ |
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private function loadStates(StateMachineInterface $stateMachine) |
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{ |
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$resolver = new OptionsResolver; |
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$resolver->setDefaults(array('type' => StateInterface::TYPE_NORMAL, 'properties' => array())); |
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$resolver->setAllowedValues('type', array( |
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StateInterface::TYPE_INITIAL, |
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StateInterface::TYPE_NORMAL, |
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StateInterface::TYPE_FINAL |
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)); |
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foreach ($this->config['states'] as $state => $config) { |
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$config = $resolver->resolve($config); |
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$stateMachine->addState(new State($state, $config['type'], array(), $config['properties'])); |
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} |
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} |
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/** |
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* @param StateMachineInterface $stateMachine |
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*/ |
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private function loadTransitions(StateMachineInterface $stateMachine) |
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{ |
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$resolver = new OptionsResolver(); |
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$resolver->setRequired(array('from', 'to')); |
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$resolver->setDefaults(array('guard' => null, 'configure_properties' => null, 'properties' => array())); |
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$resolver->setAllowedTypes('configure_properties', array('null', 'callable')); |
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$resolver->setNormalizer('from', function (Options $options, $v) { return (array) $v; }); |
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$resolver->setNormalizer('guard', function (Options $options, $v) { return !isset($v) ? null : $v; }); |
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$resolver->setNormalizer('configure_properties', function (Options $options, $v) { |
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$resolver = new OptionsResolver; |
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$resolver->setDefaults($options['properties']); |
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if (is_callable($v)) { |
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$v($resolver); |
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} |
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return $resolver; |
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}); |
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foreach ($this->config['transitions'] as $transition => $config) { |
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$config = $resolver->resolve($config); |
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$stateMachine->addTransition( |
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new Transition( |
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$transition, |
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$config['from'], |
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$config['to'], |
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$config['guard'], |
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$config['configure_properties'] |
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) |
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); |
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} |
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} |
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/** |
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* @param StateMachineInterface $stateMachine |
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*/ |
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private function loadCallbacks(StateMachineInterface $stateMachine) |
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{ |
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if (!isset($this->config['callbacks'])) { |
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return; |
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} |
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foreach (array('before', 'after') as $position) { |
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$this->loadCallbacksFor($position, $stateMachine); |
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} |
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} |
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private function loadCallbacksFor($position, $stateMachine) |
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{ |
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if (!isset($this->config['callbacks'][$position])) { |
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return; |
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} |
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$method = 'add'.ucfirst($position); |
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foreach ($this->config['callbacks'][$position] as $specs) { |
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$callback = $specs['do']; |
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unset($specs['do']); |
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$this->callbackHandler->$method($stateMachine, $callback, $specs); |
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} |
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} |
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} |
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yohang /
Finite
