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<?php |
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namespace League\Tactician\Bundle\DependencyInjection\Compiler; |
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use League\Tactician\Bundle\Handler\ContainerBasedHandlerLocator; |
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use League\Tactician\Handler\CommandHandlerMiddleware; |
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use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface; |
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use Symfony\Component\DependencyInjection\ContainerBuilder; |
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use Symfony\Component\DependencyInjection\Definition; |
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use Symfony\Component\DependencyInjection\Reference; |
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/** |
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* This compiler pass maps Handler DI tags to specific commands |
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*/ |
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class CommandHandlerPass implements CompilerPassInterface |
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{ |
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/** |
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* You can modify the container here before it is dumped to PHP code. |
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* |
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* @param ContainerBuilder $container |
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* |
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* @throws \Exception |
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* @api |
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*/ |
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public function process(ContainerBuilder $container) |
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{ |
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$defaultBusId = $container->getParameter('tactician.commandbus.default'); |
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$busIds = $container->getParameter('tactician.commandbus.ids'); |
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$busIdToHandlerMapping = []; |
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foreach ($container->findTaggedServiceIds('tactician.handler') as $id => $tags) { |
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foreach ($tags as $attributes) { |
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if (!isset($attributes['command'])) { |
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throw new \Exception('The tactician.handler tag must always have a command attribute'); |
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} |
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if (array_key_exists('bus', $attributes)) { |
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$this->abortIfInvalidBusId($attributes['bus'], $busIds); |
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} |
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$busIdsDefined = array_key_exists('bus', $attributes) ? [$attributes['bus']] : $busIds; |
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foreach ($busIdsDefined as $busId) { |
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$busIdToHandlerMapping[$busId][$attributes['command']] = $id; |
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} |
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} |
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} |
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$container->setAlias( |
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'tactician.handler.locator.symfony', |
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'tactician.commandbus.'.$defaultBusId.'.handler.locator' |
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); |
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$container->setAlias( |
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'tactician.middleware.command_handler', |
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'tactician.commandbus.'.$defaultBusId.'.middleware.command_handler' |
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); |
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foreach ($busIds as $busId) { |
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$locatorServiceId = 'tactician.commandbus.'.$busId.'.handler.locator'; |
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$methodInflectorId = $container->getParameter(sprintf('tactician.method_inflector.%s', $busId)); |
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$container->setDefinition( |
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$locatorServiceId, |
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$this->buildLocatorDefinition( |
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// Build an empty locator if no command defined. To be sure extension still working |
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array_key_exists($busId, $busIdToHandlerMapping) ? $busIdToHandlerMapping[$busId] : [] |
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) |
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); |
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$container->setDefinition( |
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'tactician.commandbus.'.$busId.'.middleware.command_handler', |
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new Definition( |
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CommandHandlerMiddleware::class, |
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[ |
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new Reference('tactician.handler.command_name_extractor.class_name'), |
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new Reference($locatorServiceId), |
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new Reference($methodInflectorId) |
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] |
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) |
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); |
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$this->guardInvalidMiddlewares($container, $busId); |
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} |
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} |
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/** |
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* @param string $id |
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* @param array $busIds |
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* @throws Exception |
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*/ |
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protected function abortIfInvalidBusId($id, array $busIds) |
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{ |
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if (!in_array($id, $busIds)) { |
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throw new \Exception('Invalid bus id "'.$id.'". Valid buses are: '.implode(', ', $busIds)); |
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} |
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} |
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/** |
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* @param array $handlerMapping |
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* @return Definition |
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*/ |
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protected function buildLocatorDefinition(array $handlerMapping) |
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{ |
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return new Definition( |
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ContainerBasedHandlerLocator::class, |
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[ |
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new Reference('service_container'), |
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$handlerMapping, |
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] |
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); |
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} |
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private function guardInvalidMiddlewares(ContainerBuilder $container, $busId) |
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{ |
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$busDefinition = $container->getDefinition('tactician.commandbus.'.$busId); |
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foreach ($busDefinition->getArgument(0) as $middlewareReference) { |
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if (false === $container->has($middlewareReference)) { |
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throw UnknownMiddleware::withId((string) $middlewareReference); |
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} |
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} |
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} |
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} |
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thephpleague /
tactician-bundle
