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@@ -0,0 +1,44 @@

+<?php

+

+namespace Oveleon\ContaoMemberExtensionBundle\EventListener\DataContainer;

+

+use Contao\CoreBundle\DependencyInjection\Attribute\AsCallback;

+use Contao\Database;

+use Contao\DataContainer;

+use Contao\MemberModel;

+use Contao\System;

+use Exception;

+

+class MemberFieldsListener

+{

+    /**

+     * @throws Exception

+     */

+    #[AsCallback(table: 'tl_member', target: 'fields.alias.save')]

+    public function generateAlias($varValue, DataContainer $dc): string

+    {

+        $aliasExists = static function (string $alias) use ($dc): bool {

+            $result = Database::getInstance()

+                ->prepare("SELECT id FROM tl_member WHERE alias=? AND id!=?")

+                ->execute($alias, $dc->id);

+

+            return $result->numRows > 0;

+        };

+

+        if (!$varValue)

+        {

+            // ToDo - use slug generator for aliases

+            $varValue = str_replace(' ','-', $dc->activeRecord->firstname) . '_' . str_replace(' ','-', $dc->activeRecord->lastname) . ($aliasExists ? '_' . $dc->activeRecord->id : '');

+        }

+        if (preg_match('/^[1-9]\d*$/', $varValue))

+        {

+            throw new Exception(sprintf($GLOBALS['TL_LANG']['ERR']['aliasNumeric'], $varValue));

+        }

+        elseif ($aliasExists($varValue))

+        {

+            throw new Exception(sprintf($GLOBALS['TL_LANG']['ERR']['aliasExists'], $varValue));

+        }

+

+        return $varValue;

+    }

+}