feat: add price popup

lib/ui/add_page/widgets/add_page.dart

@@ -4,6 +4,7 @@ import 'package:mobile_scanner/mobile_scanner.dart';
 import 'package:seshat/ui/add_page/view_model/add_view_model.dart';
 import 'package:seshat/ui/add_page/widgets/form_popup.dart';
 import 'package:seshat/ui/add_page/widgets/owner_popup.dart';
+import 'package:seshat/ui/add_page/widgets/price_popup.dart';
 import 'package:seshat/ui/core/ui/navigation_bar.dart';
 
 class AddPage extends StatefulWidget {
@@ -16,6 +17,7 @@ class AddPage extends StatefulWidget {
 }
 
 class _AddPageState extends State<AddPage> {
+  num? price;
   @override
   Widget build(BuildContext context) {
     final MobileScannerController controller = MobileScannerController(
@@ -33,8 +35,28 @@ class _AddPageState extends State<AddPage> {
           ColoredBox(color: Colors.black),
           MobileScanner(
             controller: controller,
-            onDetect: (barcodes) {
-              onBarcodeScan(barcodes, controller);
+            onDetect: (barcodes) async {
+              void setPrice(num newPrice) {
+                setState(() {
+                  price = newPrice;
+                });
+              }
+
+              if (widget.viewModel.askPrice) {
+                await _priceDialogBuilder(context, setPrice, controller);
+              } else {
+                setPrice(0);
+              }
+
+              ScaffoldMessenger.of(context).showSnackBar(
+                SnackBar(
+                  content: Text(
+                    "Envoyé : ${barcodes.barcodes.first.rawValue} pour $price€",
+                  ),
+                  behavior: SnackBarBehavior.floating,
+                ),
+              );
+              debugPrint(price.toString());
             },
           ),
           SafeArea(
@@ -106,11 +128,23 @@ class _AddPageState extends State<AddPage> {
   }
 }
 
-void onBarcodeScan(
-  BarcodeCapture barcodes,
+Future<void> _priceDialogBuilder(
+  BuildContext context,
+  Function(num) setPrice,
   MobileScannerController controller,
 ) {
-  return;
+  controller.stop();
+
+  void exitPopup(BuildContext localContext) {
+    Navigator.of(localContext).pop();
+    controller.start();
+  }
+
+  return showDialog(
+    context: context,
+    barrierDismissible: false,
+    builder: (context) => PricePopup(exitPopup: exitPopup, setPrice: setPrice),
+  );
 }
 
 Future<void> _formDialogBuilder(