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<?php |
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namespace PhpGitHooks\Module\JsonLint\Contract\Command; |
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use Bruli\EventBusBundle\CommandBus\CommandHandlerInterface; |
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use Bruli\EventBusBundle\CommandBus\CommandInterface; |
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use Bruli\EventBusBundle\QueryBus\QueryBus; |
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use PhpGitHooks\Module\Files\Contract\Query\JsonFilesExtractor; |
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use PhpGitHooks\Module\JsonLint\Service\JsonLintToolExecutor; |
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class JsonLintToolHandler implements CommandHandlerInterface |
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{ |
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/** |
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* @var JsonLintToolExecutor |
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*/ |
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private $jsonLintToolExecutor; |
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/** |
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* @var QueryBus |
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*/ |
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private $queryBus; |
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/** |
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* JsonLintTool constructor. |
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* |
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* @param JsonLintToolExecutor $jsonLintToolExecutor |
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* @param QueryBus $queryBus |
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*/ |
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public function __construct( |
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JsonLintToolExecutor $jsonLintToolExecutor, |
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QueryBus $queryBus |
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) { |
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$this->jsonLintToolExecutor = $jsonLintToolExecutor; |
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$this->queryBus = $queryBus; |
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} |
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/** |
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* @param array $files |
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* @param string $errorMessage |
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*/ |
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private function execute(array $files, $errorMessage) |
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{ |
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$jsonFilesResponse = $this->queryBus->handle(new JsonFilesExtractor($files)); |
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if (true === $this->jsonFilesExists($jsonFilesResponse->getFiles())) { |
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$this->jsonLintToolExecutor->execute($jsonFilesResponse->getFiles(), $errorMessage); |
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} |
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} |
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/** |
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* @param array $files |
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* |
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* @return bool |
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*/ |
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private function jsonFilesExists(array $files) |
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{ |
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return 0 < count($files); |
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} |
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/** |
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* @param CommandInterface|JsonLintTool $command |
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*/ |
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public function handle(CommandInterface $command) |
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{ |
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$this->execute($command->getFiles(), $command->getErrorMessage()); |
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} |
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} |
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: