Basic tenant structure

app/Middleware/IdentifyTenant.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Middleware;
+
+use App\Models\Tenant;
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+class IdentifyTenant
+{
+    public function handle(Request $request, Closure $next)
+    {
+        $host = $request->getHost();
+        $tenant = Tenant::where(['url' => $host, 'has_active_instance' => true])->first();
+
+        if (! $tenant) {
+            throw new NotFoundHttpException('Tenant not found');
+        }
+
+        app()->instance('tenant', $tenant);
+        return $next($request);
+    }
+}