reorganize and cleanup php server code

server/app/Http/Middleware/CheckIfBanned.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Vanguard\Http\Middleware;
+
+use Closure;
+
+class CheckIfBanned
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        if ($request->user() && $request->user()->isBanned()) {
+            abort(403, __("Your account is banned by administrator."));
+        }
+
+        return $next($request);
+    }
+}