intitial work on rest api

app/Http/Middleware/MeasureExecutionTime.php

@@ -0,0 +1,40 @@
+<?php
+/**
+ * https://stackoverflow.com/a/34894933
+ */
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+class MeasureExecutionTime
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request $request
+     * @param  \Closure                 $next
+     *
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        // Get the response
+        $response = $next($request);
+
+        // Calculate execution time
+        $executionTime = microtime(true) - LUMEN_START;
+
+        // I assume you're using valid json in your responses
+        // Then I manipulate them below
+        $content = json_decode($response->getContent(), true) + [
+            'execution_time' => $executionTime,
+        ];
+
+        // Change the content of your response
+        $response->setData($content);
+
+        // Return the response
+        return $response;
+    }
+}