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<?php |
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namespace Victormln\LaravelTactician; |
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use League\Tactician\CommandBus; |
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use League\Tactician\Plugins\LockingMiddleware; |
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use League\Tactician\Handler\CommandHandlerMiddleware; |
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use Victormln\LaravelTactician\Exceptions\CommandHandlerNotExists; |
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use Victormln\LaravelTactician\Locator\LocatorInterface; |
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use League\Tactician\Handler\MethodNameInflector\MethodNameInflector; |
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use League\Tactician\Handler\CommandNameExtractor\CommandNameExtractor; |
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/** |
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* The default Command bus Using Tactician, this is an implementation to dispatch commands to their handlers trough a middleware stack, every class is resolved from the laravel's service container. |
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* |
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* @package Victormln\LaravelTactician |
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*/ |
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class Bus implements CommandBusInterface |
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{ |
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/** @var CommandBus */ |
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protected $bus; |
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/** @var CommandNameExtractor */ |
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protected $commandNameExtractor; |
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/** @var MethodNameInflector */ |
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protected $methodNameInflector; |
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/** @var LocatorInterface */ |
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protected $handlerLocator; |
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public function __construct( |
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MethodNameInflector $methodNameInflector, |
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CommandNameExtractor $commandNameExtractor, |
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LocatorInterface $handlerLocator |
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) { |
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$this->methodNameInflector = $methodNameInflector; |
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$this->commandNameExtractor = $commandNameExtractor; |
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$this->handlerLocator = $handlerLocator; |
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} |
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/** |
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* Dispatch a command |
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* |
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* @param object $command Command to be dispatched |
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* @param array $middleware Array of middleware class name to add to the stack, they are resolved from the laravel container |
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* @throws CommandHandlerNotExists |
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* @return mixed |
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*/ |
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public function dispatch($command, array $middleware = []) |
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{ |
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$this->bindCommandWitHisCommandHandler($command); |
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return $this->handleTheCommand($command, $middleware); |
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} |
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private function bindCommandWitHisCommandHandler($command) |
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{ |
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$commandFullName = $this->getNameOfClass($command); |
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$commandHandlerFullName = $commandFullName . 'Handler'; |
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if (!class_exists($commandHandlerFullName)) { |
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throw CommandHandlerNotExists::with($commandHandlerFullName); |
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} |
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$this->addHandler($commandFullName, $commandHandlerFullName); |
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} |
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/** |
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* @param $command |
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* @return string |
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*/ |
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private function getNameOfClass($command): string |
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{ |
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if (\is_string($command)) { |
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return $command; |
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} |
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$reflectionCommand = new \ReflectionObject($command); |
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return $reflectionCommand->getNamespaceName() . '\\' . $reflectionCommand->getShortName(); |
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} |
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/** |
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* Add the Command Handler |
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* |
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* @param string $command Class name of the command |
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* @param string $handler Class name of the handler to be resolved from the Laravel Container |
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* @return mixed |
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*/ |
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public function addHandler($command, $handler) |
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{ |
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$this->handlerLocator->addHandler($handler, $command); |
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} |
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/** |
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* Handle the command |
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* |
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* @param $command |
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* @param $middleware |
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* @return mixed |
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*/ |
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protected function handleTheCommand($command, array $middleware) |
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{ |
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$this->bus = new CommandBus( |
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array_merge( |
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[new LockingMiddleware()], |
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$this->resolveMiddleware($middleware), |
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[new CommandHandlerMiddleware($this->commandNameExtractor, $this->handlerLocator, $this->methodNameInflector)] |
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) |
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); |
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return $this->bus->handle($command); |
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} |
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/** |
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* Resolve the middleware stack from the laravel container |
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* |
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* @param $middleware |
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* @return array |
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*/ |
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protected function resolveMiddleware(array $middleware) |
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{ |
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$m = []; |
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foreach ($middleware as $class) { |
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$m[] = app($class); |
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} |
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return $m; |
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} |
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} |
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victormln /
laravel-tactician
