[in_app_purchase] Add currencySymbol to ProductDetails (flutter#4115)

Author: renefloor

packages/in_app_purchase/in_app_purchase_platform_interface/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.1.0
+
+* Added `currencySymbol` in ProductDetails.
+
 ## 1.0.1
 
 * Fixed `Restoring previous purchases` link.

packages/in_app_purchase/in_app_purchase_platform_interface/lib/src/types/product_details.dart

@@ -12,6 +12,7 @@ class ProductDetails {
     required this.price,
     required this.rawPrice,
     required this.currencyCode,
+    this.currencySymbol = '',
   });
 
   /// The identifier of the product.
@@ -42,4 +43,9 @@ class ProductDetails {
   /// The currency code for the price of the product.
   /// Based on the price specified in the App Store Connect or Sku in Google Play console based on the platform.
   final String currencyCode;
+
+  /// The currency symbol for the locale, e.g. $ for US locale.
+  ///
+  /// When the currency symbol cannot be determined, the ISO 4217 currency code is returned.
+  final String currencySymbol;
 }

packages/in_app_purchase/in_app_purchase_platform_interface/pubspec.yaml

@@ -4,7 +4,7 @@ repository: https://github.com/flutter/plugins/tree/master/packages/in_app_purch
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+in_app_purchase%22
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.0.1
+version: 1.1.0
 
 environment:
   sdk: ">=2.12.0 <3.0.0"

packages/in_app_purchase/in_app_purchase_platform_interface/test/src/types/product_details_test.dart

@@ -16,13 +16,15 @@ void main() {
           description: 'description',
           price: '13.37',
           currencyCode: 'USD',
+          currencySymbol: r'$',
           rawPrice: 13.37);
 
       expect(productDetails.id, 'id');
       expect(productDetails.title, 'title');
       expect(productDetails.description, 'description');
       expect(productDetails.rawPrice, 13.37);
       expect(productDetails.currencyCode, 'USD');
+      expect(productDetails.currencySymbol, r'$');
     });
   });
 }