Fix the credentials page for port 8080 and improve the readme

Signed-off-by: szaimen <szaimen@e.mail.de>

php/public/index.php

@@ -98,7 +98,7 @@ $app->get('/setup', function ($request, $response, $args) use ($container) {
     /** @var \AIO\Data\Setup $setup */
     $setup = $container->get(\AIO\Data\Setup::class);
 
-    if(!$setup->CanBeInstalled()) {
+    if(!$setup->CanBeInstalled($request)) {
         return $view->render(
             $response,
             'already-installed.twig'

php/src/Data/DataConst.php

@@ -23,6 +23,10 @@ class DataConst {
         return self::GetDataDirectory() . '/configuration.json';
     }
 
+    public static function GetTempSetupFile() : string {
+        return self::GetDataDirectory() . '/temp.setup';
+    }
+
     public static function GetBackupSecretFile() : string {
         return self::GetDataDirectory() . '/backupsecret';
     }

php/src/Data/Setup.php

@@ -3,6 +3,7 @@
 namespace AIO\Data;
 
 use AIO\Auth\PasswordGenerator;
+use Psr\Http\Message\ServerRequestInterface as Request;
 
 class Setup
 {
@@ -26,7 +27,29 @@ class Setup
         return $password;
     }
 
-    public function CanBeInstalled() : bool {
-        return !file_exists(DataConst::GetConfigFile());
+    public function CanBeInstalled(?Request $request) : bool {
+        if (file_exists(DataConst::GetConfigFile())) {
+            return false;
+        }
+
+        if ($request === null) {
+            return true;
+        }
+
+        $uri = $request->getUri();
+        if ($uri->getPort() === '8080') {
+            if (!file_exists(DataConst::GetTempSetupFile())) {
+                if(!is_dir(DataConst::GetDataDirectory())) {
+                    mkdir(DataConst::GetDataDirectory());
+                }
+                file_put_contents(DataConst::GetTempSetupFile(), '');
+                return false;
+            } else {
+                    unlink(DataConst::GetTempSetupFile());
+                    return true;
+            }
+        }
+
+        return true;
     }
 }