feat: 4947 - added local "last access" timestamp for products

packages/smooth_app/lib/database/dao_product_last_access.dart

@@ -0,0 +1,40 @@
+import 'dart:async';
+import 'package:smooth_app/database/abstract_sql_dao.dart';
+import 'package:smooth_app/database/local_database.dart';
+import 'package:sqflite/sqflite.dart';
+
+/// Table that stores the local last access timestamp for a product.
+class DaoProductLastAccess extends AbstractSqlDao {
+  DaoProductLastAccess(super.localDatabase);
+
+  static const String TABLE = 'product_last_access';
+  static const String COLUMN_BARCODE = 'barcode';
+  static const String COLUMN_LAST_ACCESS = 'last_access';
+
+  static FutureOr<void> onUpgrade(
+    final Database db,
+    final int oldVersion,
+    final int newVersion,
+  ) async {
+    if (oldVersion < 5) {
+      await db.execute('create table $TABLE('
+          // cf. https://www.sqlite.org/lang_conflict.html
+          '$COLUMN_BARCODE TEXT PRIMARY KEY on conflict replace'
+          ',$COLUMN_LAST_ACCESS INT NOT NULL'
+          ')');
+    }
+  }
+
+  Future<void> put(final String barcode) async =>
+      localDatabase.database.rawInsert(
+        'insert into $TABLE($COLUMN_BARCODE, $COLUMN_LAST_ACCESS) '
+        'values(?, ?)',
+        <Object>[
+          barcode,
+          LocalDatabase.nowInMillis(),
+        ],
+      );
+
+  /// Delete all items from the database
+  Future<int> deleteAll() async => localDatabase.database.delete(TABLE);
+}

packages/smooth_app/lib/database/local_database.dart

@@ -13,6 +13,7 @@ import 'package:smooth_app/database/dao_hive_product.dart';
 import 'package:smooth_app/database/dao_instant_string.dart';
 import 'package:smooth_app/database/dao_int.dart';
 import 'package:smooth_app/database/dao_product.dart';
+import 'package:smooth_app/database/dao_product_last_access.dart';
 import 'package:smooth_app/database/dao_product_list.dart';
 import 'package:smooth_app/database/dao_string.dart';
 import 'package:smooth_app/database/dao_string_list.dart';
@@ -62,7 +63,7 @@ class LocalDatabase extends ChangeNotifier {
     final String databasePath = join(databasesRootPath, 'smoothie.db');
     final Database database = await openDatabase(
       databasePath,
-      version: 4,
+      version: 5,
       singleInstance: true,
       onUpgrade: _onUpgrade,
     );
@@ -105,5 +106,6 @@ class LocalDatabase extends ChangeNotifier {
   ) async {
     await DaoProduct.onUpgrade(db, oldVersion, newVersion);
     await DaoWorkBarcode.onUpgrade(db, oldVersion, newVersion);
+    await DaoProductLastAccess.onUpgrade(db, oldVersion, newVersion);
   }
 }

packages/smooth_app/lib/pages/offline_data_page.dart

@@ -5,6 +5,7 @@ import 'package:provider/provider.dart';
 import 'package:smooth_app/background/background_task_full_refresh.dart';
 import 'package:smooth_app/background/background_task_offline.dart';
 import 'package:smooth_app/database/dao_product.dart';
+import 'package:smooth_app/database/dao_product_last_access.dart';
 import 'package:smooth_app/database/local_database.dart';
 import 'package:smooth_app/generic_lib/design_constants.dart';
 import 'package:smooth_app/generic_lib/duration_constants.dart';
@@ -34,6 +35,8 @@ class _OfflineDataPageState extends State<OfflineDataPage> {
     final double backgroundHeight = MediaQuery.of(context).size.height * .20;
     final LocalDatabase localDatabase = context.watch<LocalDatabase>();
     final DaoProduct daoProduct = DaoProduct(localDatabase);
+    final DaoProductLastAccess daoProductLastAccess =
+        DaoProductLastAccess(localDatabase);
     final AppLocalizations appLocalizations = AppLocalizations.of(context);
     return SmoothScaffold(
       appBar: SmoothAppBar(
@@ -82,6 +85,7 @@ class _OfflineDataPageState extends State<OfflineDataPage> {
               trailing: const Icon(Icons.delete),
               onTap: () async {
                 final int totalProductsDeleted = await daoProduct.deleteAll();
+                await daoProductLastAccess.deleteAll();
                 if (mounted) {
                   ScaffoldMessenger.of(context).showSnackBar(
                     SnackBar(

packages/smooth_app/lib/pages/product/common/product_model.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:smooth_app/data_models/fetched_product.dart';
 import 'package:smooth_app/database/dao_product.dart';
+import 'package:smooth_app/database/dao_product_last_access.dart';
 import 'package:smooth_app/database/local_database.dart';
 import 'package:smooth_app/query/barcode_product_query.dart';
 
@@ -25,6 +26,7 @@ class ProductModel with ChangeNotifier {
   /// In the constructor we retrieve async'ly the product from the local db.
   ProductModel(this.barcode, this.localDatabase) {
     localDatabase.upToDate.showInterest(barcode);
+    DaoProductLastAccess(localDatabase).put(barcode);
     _asyncLoad();
   }
 

packages/smooth_app/lib/pages/product/new_product_page.dart

@@ -13,6 +13,7 @@ import 'package:smooth_app/data_models/preferences/user_preferences.dart';
 import 'package:smooth_app/data_models/product_list.dart';
 import 'package:smooth_app/data_models/product_preferences.dart';
 import 'package:smooth_app/data_models/up_to_date_mixin.dart';
+import 'package:smooth_app/database/dao_product_last_access.dart';
 import 'package:smooth_app/database/dao_product_list.dart';
 import 'package:smooth_app/database/local_database.dart';
 import 'package:smooth_app/generic_lib/buttons/smooth_large_button_with_icon.dart';
@@ -74,7 +75,9 @@ class _ProductPageState extends State<ProductPage>
   @override
   void initState() {
     super.initState();
-    initUpToDate(widget.product, context.read<LocalDatabase>());
+    final LocalDatabase localDatabase = context.read<LocalDatabase>();
+    initUpToDate(widget.product, localDatabase);
+    DaoProductLastAccess(localDatabase).put(barcode);
     questionsLayout = getUserQuestionsLayout(context.read<UserPreferences>());
     WidgetsBinding.instance.addPostFrameCallback((_) {
       _updateLocalDatabaseWithProductHistory(context);