Added a "unsaved changed" warning dialog for part, entity edits and system settings

This fixes issue #1368

src/Controller/SettingsController.php

@@ -23,6 +23,7 @@ declare(strict_types=1);
 
 namespace App\Controller;
 
+use Symfony\Component\Form\Extension\Core\Type\ResetType;
 use Symfony\Component\Form\Extension\Core\Type\SubmitType;
 use App\Settings\AppSettings;
 use Jbtronics\SettingsBundle\Form\SettingsFormFactoryInterface;
@@ -50,7 +51,9 @@ class SettingsController extends AbstractController
         $settings = $this->settingsManager->createTemporaryCopy(AppSettings::class);
 
         //Create a form builder for the settings object
-        $builder = $this->settingsFormFactory->createSettingsFormBuilder($settings);
+        $builder = $this->settingsFormFactory->createSettingsFormBuilder($settings, formOptions: [
+            'warn_on_unsaved_changes' => true,
+        ]);
 
         //Add a submit button to the form
         $builder->add('submit', SubmitType::class, ['label' => 'save']);

src/Form/AdminPages/BaseEntityAdminForm.php

@@ -57,6 +57,10 @@ class BaseEntityAdminForm extends AbstractType
         $resolver->setRequired('attachment_class');
         $resolver->setRequired('parameter_class');
         $resolver->setAllowedTypes('parameter_class', ['string', 'null']);
+
+        $resolver->setDefaults([
+            'warn_on_unsaved_changes' => true,
+        ]);
     }
 
     public function buildForm(FormBuilderInterface $builder, array $options): void

src/Form/Extension/UnsavedChangesExtension.php

@@ -0,0 +1,84 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2025 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as published
+ *  by the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+namespace App\Form\Extension;
+
+use Symfony\Component\Form\AbstractTypeExtension;
+use Symfony\Component\Form\Extension\Core\Type\FormType;
+use Symfony\Component\Form\FormInterface;
+use Symfony\Component\Form\FormView;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+/**
+ * Adds a `warn_on_unsaved_changes` option to any root form.  When set to true, the Stimulus
+ * `common--dirty-form` controller attributes are merged into the form element's HTML
+ * attributes, enabling unsaved-change detection without any template boilerplate.
+ *
+ * Usage in a form type:
+ *
+ *   public function configureOptions(OptionsResolver $resolver): void
+ *   {
+ *       $resolver->setDefaults(['warn_on_unsaved_changes' => true]);
+ *   }
+ *
+ * Or per-instance from a controller:
+ *
+ *   $form = $this->createForm(MyFormType::class, $data, ['warn_on_unsaved_changes' => true]);
+ */
+class UnsavedChangesExtension extends AbstractTypeExtension
+{
+    public function __construct(private readonly TranslatorInterface $translator)
+    {
+    }
+
+    public static function getExtendedTypes(): iterable
+    {
+        return [FormType::class];
+    }
+
+    public function configureOptions(OptionsResolver $resolver): void
+    {
+        $resolver->setDefault('warn_on_unsaved_changes', false);
+        $resolver->setAllowedTypes('warn_on_unsaved_changes', 'bool');
+    }
+
+    public function buildView(FormView $view, FormInterface $form, array $options): void
+    {
+        if (!$options['warn_on_unsaved_changes'] || $view->parent !== null) {
+            return;
+        }
+
+        $extraAttr = [
+            'data-controller' => 'common--dirty-form',
+            'data-common--dirty-form-confirm-title-value' => $this->translator->trans('form.dirty_form.unsaved_changes.title'),
+            'data-common--dirty-form-confirm-message-value' => $this->translator->trans('form.dirty_form.unsaved_changes.message'),
+        ];
+
+        // Merge data-action so existing actions on the form element are preserved.
+        $existingAction = $view->vars['attr']['data-action'] ?? '';
+        $dirtyActions = 'submit->common--dirty-form#submit reset->common--dirty-form#resetDirtyState';
+        $extraAttr['data-action'] = $existingAction !== '' ? $existingAction . ' ' . $dirtyActions : $dirtyActions;
+
+        $view->vars['attr'] = array_merge($view->vars['attr'], $extraAttr);
+    }
+}

src/Form/Part/PartBaseType.php

@@ -353,6 +353,7 @@ class PartBaseType extends AbstractType
         $resolver->setDefaults([
             'data_class' => Part::class,
             'info_provider_dto' => null,
+            'warn_on_unsaved_changes' => true,
         ]);
 
         $resolver->setAllowedTypes('info_provider_dto', [PartDetailDTO::class, 'null']);

src/Form/UserAdminForm.php

@@ -59,6 +59,10 @@ class UserAdminForm extends AbstractType
         $resolver->setDefault('parameter_class', false);
 
         $resolver->setDefault('validation_groups', ['Default', 'permissions:edit']);
+
+        $resolver->setDefaults([
+            'warn_on_unsaved_changes' => true,
+        ]);
     }
 
     public function buildForm(FormBuilderInterface $builder, array $options): void