Small corrections

composer.json

@@ -24,7 +24,7 @@
     "support": {
         "issues": "https://github.com/opencultureconsulting/oai-pmh2/issues",
         "source": "https://github.com/opencultureconsulting/oai-pmh2",
-        "docs": "https://github.com/opencultureconsulting/oai-pmh2/blob/main/README.md"
+        "docs": "https://opencultureconsulting.github.io/oai-pmh2/"
     },
     "require": {
         "php": "^8.1",
@@ -61,8 +61,8 @@
     },
     "scripts": {
         "pre-install-cmd": [
-            "@php -r \"!is_dir('./data') && mkdir('./data', 0775);\"",
-            "@php -r \"!file_exists('./config/config.yml') && copy('./config/config.dist.yml', './config/config.yml');\""
+            "@php -r \"if (!is_dir('./data')) { mkdir('./data', 0775); }\"",
+            "@php -r \"if (!file_exists('./config/config.yml')) { copy('./config/config.dist.yml', './config/config.yml'); }\""
         ],
         "post-install-cmd": [
             "@doctrine:clear-cache --quiet",

public/index.php

@@ -24,5 +24,4 @@ namespace OCC\OaiPmh2;
 
 require __DIR__ . '/../vendor/autoload.php';
 
-$app = new App();
-$app->run();
+(new App())->run();

src/Middleware.php

@@ -77,4 +77,11 @@ abstract class Middleware extends AbstractMiddleware
         }
         return $response;
     }
+
+    final public function __construct()
+    {
+        // Make constructor final to avoid issues in dispatcher.
+        // @see https://psalm.dev/229
+    }
+
 }

src/Middleware/Dispatcher.php

@@ -88,10 +88,11 @@ class Dispatcher extends AbstractMiddleware
         if (!ErrorHandler::getInstance()->hasErrors()) {
             /** @var string */
             $verb = $request->getAttribute('verb');
-            /** @var Middleware $middleware */
             $middleware = __NAMESPACE__ . '\\' . $verb;
+            if (is_a($middleware, Middleware::class, true)) {
                 $this->requestHandler->queue->enqueue(new $middleware());
             }
+        }
         $this->requestHandler->queue->enqueue(ErrorHandler::getInstance());
         return $request;
     }