show warning on activation if asset files doesn't exist

README.en.md

@@ -46,6 +46,8 @@ php composer require d3/oxid-debugbar:^1.0
 
 If necessary, please confirm that you allow `composer-symlinker` and `composer-patches` to execute code.
 
+Have the files of the package `oxid-esales/oxideshop-ce` overwritten.
+
 Activate the module in Shopadmin under "Extensions -> Modules".
 
 ## How to use

README.md

@@ -46,6 +46,8 @@ php composer require d3/oxid-debugbar:^1.0
 
 Sofern nötig, bestätigen Sie bitte, dass Sie `composer-symlinker` und `composer-patches` erlauben, Code auszuführen.
 
+Lassen Sie die Dateien des Paketes `oxid-esales/oxideshop-ce` überschreiben.
+
 Aktivieren Sie das Modul im Shopadmin unter "Erweiterungen -> Module".
 
 ## Verwendung

Setup/Events.php

@@ -0,0 +1,53 @@
+<?php
+
+/**
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * https://www.d3data.de
+ *
+ * @copyright (C) D3 Data Development (Inh. Thomas Dartsch)
+ * @author    D3 Data Development - Daniel Seifert <info@shopmodule.com>
+ * @link      https://www.oxidmodule.com
+ */
+
+declare(strict_types=1);
+
+namespace D3\DebugBar\Setup;
+
+use D3\ModCfg\Application\Model\Exception\d3ShopCompatibilityAdapterException;
+use D3\ModCfg\Application\Model\Install\d3install;
+use Doctrine\DBAL\DBALException;
+use OxidEsales\Eshop\Core\Exception\DatabaseConnectionException;
+use OxidEsales\Eshop\Core\Exception\DatabaseErrorException;
+use OxidEsales\Eshop\Core\Exception\StandardException;
+use OxidEsales\Eshop\Core\Exception\SystemComponentException;
+use OxidEsales\Eshop\Core\Registry;
+
+class Events
+{
+    /**
+     * @throws d3ShopCompatibilityAdapterException
+     * @throws DBALException
+     * @throws DatabaseConnectionException
+     * @throws DatabaseErrorException
+     * @throws StandardException
+     * @throws SystemComponentException
+     */
+    public static function onActivate()
+    {
+        if (false === file_exists(
+            rtrim(Registry::getConfig()->getConfigParam('sShopDir'), '/').'/out/debugbar/debugbar.jas'
+        )) {
+            Registry::getUtilsView()->addErrorToDisplay(
+                'The asset files cannot be found. Have you forgotten an installation step described in <a href="https://git.d3data.de/D3Public/DebugBar/src/branch/main/README.en.md">README</a>? Then please run the installation again.'.
+                nl2br(PHP_EOL.PHP_EOL).
+                'Die Assetdateien können nicht gefunden werden. Hast Du einen Installationsschritt vergessen, der in <a href="https://git.d3data.de/D3Public/DebugBar/src/branch/main/README.md">README</a> beschrieben ist? Dann führe die Installation bitte noch einmal aus.'
+            );
+        }
+    }
+
+    public static function onDeactivate()
+    {
+    }
+}

ToDo.md

@@ -3,4 +3,4 @@
 - clear tpl cache button
 - phpinfo() overview
 - automatic switch between Smarty and Twig
-- displayed in live shop when logged in as admin
+- displayed in live shop when logged in as admin

metadata.php

@@ -42,7 +42,9 @@ $aModule = [
         Config::class      => Config_DebugBar::class,
         ShopControl::class => ShopControl_DebugBar::class,
     ],
-    'events'      => [],
+    'events'      => [
+        'onActivate'    => '\D3\DebugBar\Setup\Events::onActivate',
+    ],
     'templates'   => [],
     'settings'    => [],
     'blocks'      => [],