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<?php |
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namespace JK\Sam\Filter; |
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use Exception; |
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use JK\Sam\Configuration\ConfigurationInterface; |
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use JK\Sam\Filter\Compass\CompassFilter; |
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use JK\Sam\Filter\Copy\CopyFilter; |
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use JK\Sam\Filter\Merge\MergeFilter; |
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use JK\Sam\Filter\Minify\MinifyFilter; |
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use Symfony\Component\EventDispatcher\EventDispatcherInterface; |
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use Symfony\Component\OptionsResolver\OptionsResolver; |
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class FilterBuilder |
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{ |
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/** |
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* @var array |
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*/ |
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protected $mapping = []; |
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/** |
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* @var bool |
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*/ |
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protected $isDebug = true; |
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/** |
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* @var EventDispatcherInterface |
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*/ |
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protected $eventDispatcher; |
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/** |
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* FilterBuilder constructor. |
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* |
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* @param EventDispatcherInterface $eventDispatcher |
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*/ |
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public function __construct(EventDispatcherInterface $eventDispatcher) |
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{ |
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$this->mapping = [ |
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'compass' => CompassFilter::class, |
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'copy' => CopyFilter::class, |
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'merge' => MergeFilter::class, |
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'minify' => MinifyFilter::class, |
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]; |
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$this->eventDispatcher = $eventDispatcher; |
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} |
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/** |
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* Build the filter with the given configuration. |
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* |
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* @param array $filterConfigurations |
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* @return FilterInterface[] |
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* @throws Exception |
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*/ |
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public function build(array $filterConfigurations) |
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{ |
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$resolver = new OptionsResolver(); |
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$filters = []; |
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foreach ($filterConfigurations as $filterName => $filterConfiguration) { |
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$resolver->clear(); |
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if ($filterConfiguration === null) { |
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$filterConfiguration = []; |
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} |
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$configuration = $this->getFilterConfiguration($filterName); |
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$configuration->configureOptions($resolver); |
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$configuration->setParameters($resolver->resolve($filterConfiguration)); |
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$class = $this->mapping[$filterName]; |
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/** @var FilterInterface $filter */ |
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$filter = new $class( |
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// filter's name |
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$filterName, |
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// filter's configuration |
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$configuration, |
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// event dispatcher |
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$this->eventDispatcher |
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); |
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$filter->checkRequirements(); |
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$filters[$filterName] = $filter; |
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} |
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return $filters; |
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} |
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/** |
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* Return filter configuration instance using the configured mapping. |
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* |
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* @param $filter |
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* @return ConfigurationInterface |
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* @throws Exception |
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*/ |
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protected function getFilterConfiguration($filter) |
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{ |
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if (!array_key_exists($filter, $this->mapping)) { |
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throw new Exception($filter.' filter not found in assets mapping. Check your configuration'); |
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} |
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$class = $this->mapping[$filter].'Configuration'; |
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if (!class_exists($class)) { |
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throw new Exception($class.' filter configuration class not found'); |
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} |
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$configuration = new $class(); |
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if (!($configuration instanceof ConfigurationInterface)) { |
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throw new Exception(get_class($configuration).' should be an instance of '.ConfigurationInterface::class); |
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} |
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return $configuration; |
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} |
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} |
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johnkrovitch /
Sam
