More work on the API utilizing Laravel 5.5 exception rendering

Also corrects API format to maintain JSONAPI spec

app/Exceptions/DisplayException.php

@@ -11,9 +11,12 @@ namespace Pterodactyl\Exceptions;
 
 use Log;
 use Throwable;
+use Prologue\Alerts\AlertsMessageBag;
 
 class DisplayException extends PterodactylException
 {
+    const LEVEL_DEBUG = 'debug';
+    const LEVEL_INFO = 'info';
     const LEVEL_WARNING = 'warning';
     const LEVEL_ERROR = 'error';
 
@@ -32,13 +35,13 @@ class DisplayException extends PterodactylException
      */
     public function __construct($message, Throwable $previous = null, $level = self::LEVEL_ERROR, $code = 0)
     {
-        $this->level = $level;
+        parent::__construct($message, $code, $previous);
 
         if (! is_null($previous)) {
             Log::{$level}($previous);
         }
 
-        parent::__construct($message, $code, $previous);
+        $this->level = $level;
     }
 
     /**
@@ -48,4 +51,25 @@ class DisplayException extends PterodactylException
     {
         return $this->level;
     }
+
+    /**
+     * Render the exception to the user by adding a flashed message to the session
+     * and then redirecting them back to the page that they came from. If the
+     * request originated from an API hit, return the error in JSONAPI spec format.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @return \Illuminate\Http\JsonResponse|\Illuminate\Http\RedirectResponse
+     */
+    public function render($request)
+    {
+        if ($request->expectsJson()) {
+            return response()->json(Handler::convertToArray($this, [
+                'detail' => $this->getMessage(),
+            ]), 500);
+        }
+
+        app()->make(AlertsMessageBag::class)->danger($this->getMessage())->flash();
+
+        return redirect()->back()->withInput();
+    }
 }