feat: 5099 - new dev mode item to refresh all the products from the s…

…erver (#5100)

Impacted files:
* `dao_product.dart`: new method `clearAllLanguages`
* `pubspec.lock`: wtf
* `user_preferences_dev_mode.dart`: added a "Refresh all products from server (cf. Nutriscore v2)" item

packages/smooth_app/lib/database/dao_product.dart

@@ -302,4 +302,15 @@ class DaoProduct extends AbstractSqlDao implements BulkDeletable {
 
     return result;
   }
+
+  /// Sets the language of all products to null.
+  ///
+  /// This is useful to refresh the whole database, as products without language
+  /// are easy to detect. And therefore we can say "refresh all the products
+  /// with a language null or different from the current app language", and use
+  /// the same mechanism as "switch language and refresh products accordingly".
+  Future<int> clearAllLanguages() async => localDatabase.database.update(
+        _TABLE_PRODUCT,
+        <String, Object?>{_TABLE_PRODUCT_COLUMN_LANGUAGE: null},
+      );
 }

packages/smooth_app/lib/pages/preferences/user_preferences_dev_mode.dart

@@ -5,9 +5,11 @@ import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:provider/provider.dart';
 import 'package:smooth_app/background/background_task_badge.dart';
+import 'package:smooth_app/background/background_task_language_refresh.dart';
 import 'package:smooth_app/data_models/continuous_scan_model.dart';
 import 'package:smooth_app/data_models/preferences/user_preferences.dart';
 import 'package:smooth_app/data_models/product_list.dart';
+import 'package:smooth_app/database/dao_product.dart';
 import 'package:smooth_app/database/dao_product_list.dart';
 import 'package:smooth_app/database/local_database.dart';
 import 'package:smooth_app/generic_lib/dialogs/smooth_alert_dialog.dart';
@@ -291,6 +293,17 @@ class UserPreferencesDevMode extends AbstractUserPreferences {
             ProductQuery.setLanguage(context, userPreferences);
           },
         ),
+        UserPreferencesItemTile(
+          title: 'Refresh all products from server (cf. Nutriscore v2)',
+          trailing: const Icon(Icons.refresh),
+          onTap: () async {
+            final LocalDatabase localDatabase = context.read<LocalDatabase>();
+            final DaoProduct daoProduct = DaoProduct(localDatabase);
+            await daoProduct.clearAllLanguages();
+            await BackgroundTaskLanguageRefresh.addTask(localDatabase);
+            _showSuccessMessage();
+          },
+        ),
         UserPreferencesItemSwitch(
           title: 'Side by side comparison for 2 or 3 products',
           value: