Add validation for component properties

composer.json

@@ -29,6 +29,7 @@
         "symfony/http-foundation": "^5.4|^6.0|^7.0",
         "symfony/http-kernel": "^5.4|^6.0|^7.0",
         "symfony/intl": "^5.4|^6.0|^7.0",
+        "symfony/options-resolver": "^5.4|^6.0|^7.0",
         "symfony/property-access": "^5.4|^6.0|^7.0",
         "symfony/security-bundle": "^5.4|^6.0|^7.0",
         "symfony/string": "^5.4|^6.0|^7.0",

src/Twig/Component/Banner.php

@@ -3,12 +3,30 @@
 namespace EasyCorp\Bundle\EasyAdminBundle\Twig\Component;
 
 use EasyCorp\Bundle\EasyAdminBundle\Config\Enum\BannerVariant;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\UX\TwigComponent\Attribute\PreMount;
 
 class Banner
 {
     public BannerVariant|string $variant = BannerVariant::Info;
     public bool $withDismissButton = false;
 
+    #[PreMount]
+    public function preMount(array $data): array
+    {
+        $resolver = new OptionsResolver();
+        $resolver->setIgnoreUndefined(true);
+
+        $resolver->define('variant')
+            ->allowedTypes('string', BannerVariant::class)
+            ->allowedValues(...array_map(static fn(BannerVariant $variant): string => $variant->value, BannerVariant::cases()));
+
+        $resolver->define('withDismissButton')
+            ->allowedTypes('bool');
+
+        return $resolver->resolve($data) + $data;
+    }
+
     public function getVariantCssClass(): string
     {
         return \is_string($this->variant) ? $this->variant : $this->variant->asCssClass();