feat: 5403 - improvements for "price adding"

Impacted files:
* `app_en.arb`: added a "remember my choice" and a "barcode already there" labels
* `app_fr.arb`: added a "remember my choice" and a "barcode already there" labels
* `price_amount_card.dart`: now using a focus node and a `key`; stronger resilience
* `price_amount_field.dart`: now using a focus node
* `price_amount_model.dart`: minor refactoring
* `price_model.dart`: new `getBarcodes` method
* `price_product_search_page.dart`: now managing a list of existing barcodes; now storing at session level the answer of the "server look-up?" question
* `product_price_add_page.dart`: now manages a focus on the latest added product, and keys for item deletion; not displaying the "add product" button if irrelevant

packages/smooth_app/lib/l10n/app_en.arb

@@ -1726,6 +1726,15 @@
         }
     },
     "prices_barcode_reader_action": "Barcode reader",
+    "prices_barcode_already": "Barcode {barcode} is already in the list!",
+    "@prices_barcode_already": {
+        "description": "Validation error message about barcode already being in the barcode list",
+        "placeholders": {
+            "barcode": {
+                "type": "String"
+            }
+        }
+    },
     "prices_view_prices": "View the prices",
     "prices_list_length_one_page": "{count,plural, =0{No price yet} =1{Only one price} other{All {count} prices}}",
     "@prices_list_length_one_page": {
@@ -2354,6 +2363,10 @@
     "@image_edit_url_error": {
         "description": "Error message, when editing image fails, due to missing url."
     },
+    "remember_my_choice_session": "Remember my choice for the current session",
+    "@remember_my_choice_session": {
+        "description": "Checkbox label when we want to remember the choice"
+    },
     "user_picture_source_remember": "Remember my choice",
     "@user_picture_source_remember": {
         "description": "Checkbox label when select a picture source"

packages/smooth_app/lib/l10n/app_fr.arb

@@ -1704,6 +1704,15 @@
             }
         }
     },
+    "prices_barcode_already": "Le code-barres {barcode} fait déjà partie de la liste !",
+    "@prices_barcode_already": {
+        "description": "Validation error message about barcode already being in the barcode list",
+        "placeholders": {
+            "barcode": {
+                "type": "String"
+            }
+        }
+    },
     "prices_list_length_many_pages": "{pageSize} prix les plus récents (total : {total})",
     "@prices_list_length_many_pages": {
         "description": "Number of prices for one-page result",
@@ -2317,6 +2326,10 @@
     "@image_edit_url_error": {
         "description": "Error message, when editing image fails, due to missing url."
     },
+    "remember_my_choice_session": "Mémoriser mon choix pour la session en cours",
+    "@remember_my_choice_session": {
+        "description": "Checkbox label when we want to remember the choice"
+    },
     "user_picture_source_remember": "Mémoriser mon choix",
     "@user_picture_source_remember": {
         "description": "Checkbox label when select a picture source"

packages/smooth_app/lib/pages/prices/price_amount_card.dart

@@ -12,19 +12,19 @@ import 'package:smooth_app/pages/prices/price_product_search_page.dart';
 
 /// Card that displays the amounts (discounted or not) for price adding.
 class PriceAmountCard extends StatefulWidget {
-  PriceAmountCard({
+  const PriceAmountCard({
     required this.priceModel,
     required this.index,
     required this.refresh,
-  })  : model = priceModel.priceAmountModels[index],
-        total = priceModel.priceAmountModels.length;
+    this.focusNode,
+    super.key,
+  });
 
   final PriceModel priceModel;
-  final PriceAmountModel model;
   final int index;
-  final int total;
   // TODO(monsieurtanuki): not elegant, the display was not refreshed when removing an item
   final VoidCallback refresh;
+  final FocusNode? focusNode;
 
   @override
   State<PriceAmountCard> createState() => _PriceAmountCardState();
@@ -35,22 +35,33 @@ class _PriceAmountCardState extends State<PriceAmountCard> {
   final TextEditingController _controllerWithoutDiscount =
       TextEditingController();
 
+  @override
+  void initState() {
+    super.initState();
+    _controllerPaid.text = _model.paidPrice;
+    _controllerWithoutDiscount.text = _model.priceWithoutDiscount;
+  }
+
+  PriceAmountModel get _model =>
+      widget.priceModel.priceAmountModels[widget.index];
+  int get _total => widget.priceModel.priceAmountModels.length;
+
   @override
   Widget build(BuildContext context) {
     final AppLocalizations appLocalizations = AppLocalizations.of(context);
-    final bool isEmpty = widget.model.product.barcode.isEmpty;
+    final bool isEmpty = _model.product.barcode.isEmpty;
     return SmoothCard(
       child: Column(
         children: <Widget>[
           Text(
             '${appLocalizations.prices_amount_subtitle}'
-            '${widget.total == 1 ? '' : ' (${widget.index + 1}/${widget.total})'}',
+            '${_total == 1 ? '' : ' (${widget.index + 1}/$_total)'}',
           ),
           PriceProductListTile(
-            product: widget.model.product,
+            product: _model.product,
             trailingIconData: isEmpty
                 ? Icons.edit
-                : widget.total == 1
+                : _total == 1
                     ? null
                     : Icons.clear,
             onPressed: isEmpty
@@ -59,15 +70,18 @@ class _PriceAmountCardState extends State<PriceAmountCard> {
                         await Navigator.of(context).push<PriceMetaProduct>(
                       MaterialPageRoute<PriceMetaProduct>(
                         builder: (BuildContext context) =>
-                            const PriceProductSearchPage(),
+                            PriceProductSearchPage(
+                          barcodes: widget.priceModel.getBarcodes(),
+                        ),
                       ),
                     );
                     if (product == null) {
                       return;
                     }
-                    setState(() => widget.model.product = product);
+                    _model.product = product;
+                    widget.refresh.call();
                   }
-                : widget.total == 1
+                : _total == 1
                     ? null
                     : () {
                         widget.priceModel.priceAmountModels
@@ -76,32 +90,32 @@ class _PriceAmountCardState extends State<PriceAmountCard> {
                       },
           ),
           SmoothLargeButtonWithIcon(
-            icon: widget.model.promo
-                ? Icons.check_box
-                : Icons.check_box_outline_blank,
+            icon:
+                _model.promo ? Icons.check_box : Icons.check_box_outline_blank,
             text: appLocalizations.prices_amount_is_discounted,
             onPressed: () => setState(
-              () => widget.model.promo = !widget.model.promo,
+              () => _model.promo = !_model.promo,
             ),
           ),
           const SizedBox(height: SMALL_SPACE),
           Row(
             children: <Widget>[
               Expanded(
                 child: PriceAmountField(
+                  focusNode: widget.focusNode,
                   controller: _controllerPaid,
                   isPaidPrice: true,
-                  model: widget.model,
+                  model: _model,
                 ),
               ),
               const SizedBox(width: LARGE_SPACE),
               Expanded(
-                child: !widget.model.promo
+                child: !_model.promo
                     ? Container()
                     : PriceAmountField(
                         controller: _controllerWithoutDiscount,
                         isPaidPrice: false,
-                        model: widget.model,
+                        model: _model,
                       ),
               ),
             ],

packages/smooth_app/lib/pages/prices/price_amount_field.dart

@@ -9,13 +9,14 @@ class PriceAmountField extends StatelessWidget {
     required this.model,
     required this.isPaidPrice,
     required this.controller,
+    this.focusNode,
   });
 
   final PriceAmountModel model;
   final bool isPaidPrice;
   final TextEditingController controller;
+  final FocusNode? focusNode;
 
-  // TODO(monsieurtanuki): TextInputAction + focus
   static const TextInputType _priceTextInputType =
       TextInputType.numberWithOptions(
     signed: false,
@@ -26,6 +27,7 @@ class PriceAmountField extends StatelessWidget {
   Widget build(BuildContext context) {
     final AppLocalizations appLocalizations = AppLocalizations.of(context);
     return SmoothTextFormField(
+      focusNode: focusNode,
       type: TextFieldTypes.PLAIN_TEXT,
       controller: controller,
       hintText: !isPaidPrice

packages/smooth_app/lib/pages/prices/price_amount_model.dart

@@ -10,12 +10,8 @@ class PriceAmountModel {
 
   PriceMetaProduct product;
 
-  String _paidPrice = '';
-  String _priceWithoutDiscount = '';
-
-  set paidPrice(final String value) => _paidPrice = value;
-
-  set priceWithoutDiscount(final String value) => _priceWithoutDiscount = value;
+  String paidPrice = '';
+  String priceWithoutDiscount = '';
 
   late double _checkedPaidPrice;
   double? _checkedPriceWithoutDiscount;
@@ -37,11 +33,11 @@ class PriceAmountModel {
     if (product.barcode.isEmpty) {
       return appLocalizations.prices_amount_no_product;
     }
-    _checkedPaidPrice = validateDouble(_paidPrice)!;
+    _checkedPaidPrice = validateDouble(paidPrice)!;
     _checkedPriceWithoutDiscount = null;
     if (promo) {
-      if (_priceWithoutDiscount.isNotEmpty) {
-        _checkedPriceWithoutDiscount = validateDouble(_priceWithoutDiscount);
+      if (priceWithoutDiscount.isNotEmpty) {
+        _checkedPriceWithoutDiscount = validateDouble(priceWithoutDiscount);
         if (_checkedPriceWithoutDiscount == null) {
           return appLocalizations.prices_amount_price_incorrect;
         }

packages/smooth_app/lib/pages/prices/price_model.dart

@@ -25,6 +25,14 @@ class PriceModel with ChangeNotifier {
 
   final List<PriceAmountModel> priceAmountModels;
 
+  List<String> getBarcodes() {
+    final List<String> result = <String>[];
+    for (final PriceAmountModel priceAmountModel in priceAmountModels) {
+      result.add(priceAmountModel.product.barcode);
+    }
+    return result;
+  }
+
   CropParameters? _cropParameters;
 
   CropParameters? get cropParameters => _cropParameters;