Added default domain resolver.

config/domain-scope.php

@@ -2,6 +2,7 @@
 declare(strict_types = 1);
 
 use App\Models\Domain;
+use Illuminate\Database\Eloquent\Model;
 
 return [
 
@@ -79,6 +80,20 @@
 
     'ignore' => array_map('strtolower', explode(',', env('DOMAINSCOPE_IGNORE', 'www'))),
 
+    /*
+    |--------------------------------------------------------------------------
+    | Default domain resolver.
+    |--------------------------------------------------------------------------
+    |
+    | If no (sub)domain could be matched, it's useful to fallback to a default
+    | domain. Configure your own resolver here.
+    |
+    */
+
+    'default' => function (string $domain): ?Model {
+        return null;
+    },
+
     /*
     |--------------------------------------------------------------------------
     | Scoped models.
@@ -111,8 +126,8 @@
     | -----
     | {domain} will be replaced by the lowercase variant of the domain, based
     | on mode. It will insert the subdomain in sub mode and the full domain
-    | in full mode. You, as developer, can re-use this key to populate or clear
-    | the cache in your part of the application.
+    | in full mode. You can re-use this key to populate or clear the cache in
+    | your part of the application.
     |
     */
 

src/Http/Middleware/DetectDomain.php

@@ -24,6 +24,11 @@ public function handle(Request $request, Closure $next) // phpcs:ignore
         $resolver = app('domain-scope.resolver');
         $model = $resolver->resolve($domain);
 
+        // If no domain has been matched, try the default fallback resolver.
+        if (!$model && is_callable($fallback = config('domain-scope.default'))) {
+            $model = $fallback($domain);
+        }
+
         // If a domain has been matched, configure the application.
         if ($model) {
             // Bind the current domain into the service container.