2 files changed, 20 insertions, 0 deletions
diff --git a/src/AbstractStrategy.php b/src/AbstractStrategy.php
index 29d9651..206fd0d 100644
--- a/src/AbstractStrategy.php
+++ b/src/AbstractStrategy.php
@@ -4,6 +4,7 @@ declare(strict_types=1);
 
 namespace Lightscale\Router;
 
+use InvalidArgumentException;
 use Lightscale\Router\Contracts\Middleware;
 use Lightscale\Router\Contracts\Strategy;
 use Psr\Http\Message\RequestInterface;
@@ -29,4 +30,17 @@ abstract class AbstractStrategy implements Strategy
 
         return $handler($request);
     }
+
+    public function parseParameters(array $parameters): array
+    {
+        foreach ($parameters as $key => $value) {
+            if (!is_string($value)) {
+                throw new InvalidArgumentException(
+                    "Parameter {$key} is not a string."
+                );
+            }
+        }
+
+        return $parameters;
+    }
 }
diff --git a/src/Contracts/Strategy.php b/src/Contracts/Strategy.php
index 7dea459..bf447c3 100644
--- a/src/Contracts/Strategy.php
+++ b/src/Contracts/Strategy.php
@@ -23,4 +23,10 @@ interface Strategy
     public function runRoute(RouteCall $call): ResponseInterface;
 
     public function notFound(RequestInterface $request): ResponseInterface;
+
+    /**
+     * @param array<string, mixed> $parameters
+     * @return array<string, string>
+     */
+    public function parseParameters(array $parameters): array;
 }