debug mode setting

app/bot.php

@@ -124,6 +124,9 @@ class Bot
             case preg_match('~^/mtproto$~', $this->input['callback'], $m):
                 $this->mtproto();
                 break;
+            case preg_match('~^/debug$~', $this->input['callback'], $m):
+                $this->debug();
+                break;
             case preg_match('~^/generateSecret$~', $this->input['callback'], $m):
                 $this->generateSecret();
                 break;
@@ -2632,6 +2635,12 @@ DNS-over-HTTPS with IP:
                 'callback_data' => "/blinkmenuswitch",
             ],
         ];
+        $data[] = [
+            [
+                'text'          => $this->i18n('debug') . ': ' . $this->i18n($c['debug'] ? 'on' : 'off'),
+                'callback_data' => "/debug",
+            ],
+        ];
         $data[] = [
             [
                 'text'          => $this->i18n('back'),
@@ -2644,6 +2653,15 @@ DNS-over-HTTPS with IP:
         ];
     }
 
+    public function debug()
+    {
+        $file = __DIR__ . '/config.php';
+        require $file;
+        $c['debug'] = !$c['debug'];
+        file_put_contents($file, "<?php\n\n\$c = " . var_export($c, true) . ";\n");
+        $this->menu('config');
+    }
+
     public function getStatusPeer(string $publickey, array $peers)
     {
         foreach ($peers as $k => $v) {

app/i18n.php

@@ -237,4 +237,8 @@ $i = [
         'en' => 'defaultDNS',
         'ru' => 'дефолтный днс',
     ],
+    'debug'  => [
+        'en' => 'debug mode',
+        'ru' => 'режим отладки',
+    ],
 ];

app/index.php

@@ -5,7 +5,9 @@ require __DIR__ . '/timezone.php';
 // bot
 require __DIR__ . '/config.php';
 if ('POST' == $_SERVER['REQUEST_METHOD'] && $_GET['k'] == $c['key']) {
-    // require __DIR__ . '/debug.php';
+    if ($c['debug']) {
+        require __DIR__ . '/debug.php';
+    }
     require __DIR__ . '/calc.php';
     require __DIR__ . '/bot.php';
     require __DIR__ . '/i18n.php';