Initial EV files

system/Filters/DebugToolbar.php

@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * This file is part of the CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Filters;
+
+use CodeIgniter\HTTP\IncomingRequest;
+use CodeIgniter\HTTP\RequestInterface;
+use CodeIgniter\HTTP\Response;
+use CodeIgniter\HTTP\ResponseInterface;
+use Config\Services;
+
+/**
+ * Debug toolbar filter
+ */
+class DebugToolbar implements FilterInterface
+{
+	/**
+	 * We don't need to do anything here.
+	 *
+	 * @param RequestInterface|IncomingRequest $request
+	 * @param array|null                       $arguments
+	 *
+	 * @return void
+	 */
+	public function before(RequestInterface $request, $arguments = null)
+	{
+	}
+
+	//--------------------------------------------------------------------
+
+	/**
+	 * If the debug flag is set (CI_DEBUG) then collect performance
+	 * and debug information and display it in a toolbar.
+	 *
+	 * @param RequestInterface|IncomingRequest $request
+	 * @param ResponseInterface|Response       $response
+	 * @param array|null                       $arguments
+	 *
+	 * @return void
+	 */
+	public function after(RequestInterface $request, ResponseInterface $response, $arguments = null)
+	{
+		Services::toolbar()->prepare($request, $response);
+	}
+
+	//--------------------------------------------------------------------
+}