Stock barcode fix (#232)

* API: Provide more info in error messages

* Fix support for legacy stock item custom barcodes

* Refresh display after assigning barcode

* Update release notes

* Fix for scanning unkown barcode

- Modern API returns slightly different data

* Fix for scanning unkown barcode

- Modern API returns slightly different data

* Update release notes

lib/barcode.dart

@@ -1,6 +1,7 @@
 import "dart:io";
 import "package:flutter/material.dart";
 import "package:font_awesome_flutter/font_awesome_flutter.dart";
+import "package:inventree/widget/refreshable_state.dart";
 import "package:one_context/one_context.dart";
 import "package:qr_code_scanner/qr_code_scanner.dart";
 
@@ -569,16 +570,23 @@ class UniqueBarcodeHandler extends BarcodeHandler {
   Future<void> onBarcodeUnknown(Map<String, dynamic> data) async {
     // If the barcode is unknown, we *can* assign it to the stock item!
 
-    if (!data.containsKey("hash")) {
+    if (!data.containsKey("hash") && !data.containsKey("barcode_hash")) {
       showServerError(
         "barcode/",
         L10().missingData,
         L10().barcodeMissingHash,
       );
     } else {
-      String hash = (data["hash"] ?? "") as String;
+      String barcode;
 
-      if (hash.isEmpty) {
+      if (InvenTreeAPI().supportModernBarcodes) {
+        barcode = (data["barcode_data"] ?? "") as String;
+      } else {
+        // Legacy barcode API
+        barcode = (data["hash"] ?? data["barcode_hash"] ?? "") as String;
+      }
+
+      if (barcode.isEmpty) {
         barcodeFailureTone();
 
         showSnackIcon(
@@ -594,7 +602,7 @@ class UniqueBarcodeHandler extends BarcodeHandler {
           OneContext().pop();
         }
 
-        callback(hash);
+        callback(barcode);
       }
     }
   }
@@ -737,7 +745,7 @@ Future<void> scanQrCode(BuildContext context) async {
 /*
  * Construct a generic ListTile widget to link or un-link a custom barcode from a model.
  */
-Widget customBarcodeActionTile(BuildContext context, String barcode, String model, int pk) {
+Widget customBarcodeActionTile(BuildContext context, RefreshableState state, String barcode, String model, int pk) {
 
   if (barcode.isEmpty) {
     return ListTile(
@@ -755,6 +763,8 @@ Widget customBarcodeActionTile(BuildContext context, String barcode, String mode
               result ? L10().barcodeAssigned : L10().barcodeNotAssigned,
               success: result
             );
+
+            state.refresh(context);
           });
         });
 
@@ -776,9 +786,12 @@ Widget customBarcodeActionTile(BuildContext context, String barcode, String mode
         }).then((bool result) {
           showSnackIcon(
             result ? L10().requestSuccessful : L10().requestFailed,
+            success: result,
           );
+
+          state.refresh(context);
         });
       },
     );
   }
-}
+}