[Gallery] Fix directory structure (#312)

gallery/lib/studies/shrine/model/product.dart

@@ -0,0 +1,70 @@
+// Copyright 2019 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/material.dart';
+import 'package:flutter/foundation.dart';
+
+import '../../../l10n/gallery_localizations.dart';
+
+class Category {
+  const Category({
+    @required this.name,
+  }) : assert(name != null);
+
+  // A function taking a BuildContext as input and
+  // returns the internationalized name of the category.
+  final String Function(BuildContext) name;
+}
+
+Category categoryAll = Category(
+  name: (context) => GalleryLocalizations.of(context).shrineCategoryNameAll,
+);
+
+Category categoryAccessories = Category(
+  name: (context) =>
+      GalleryLocalizations.of(context).shrineCategoryNameAccessories,
+);
+
+Category categoryClothing = Category(
+  name: (context) =>
+      GalleryLocalizations.of(context).shrineCategoryNameClothing,
+);
+
+Category categoryHome = Category(
+  name: (context) => GalleryLocalizations.of(context).shrineCategoryNameHome,
+);
+
+List<Category> categories = [
+  categoryAll,
+  categoryAccessories,
+  categoryClothing,
+  categoryHome,
+];
+
+class Product {
+  const Product({
+    @required this.category,
+    @required this.id,
+    @required this.isFeatured,
+    @required this.name,
+    @required this.price,
+  })  : assert(category != null),
+        assert(id != null),
+        assert(isFeatured != null),
+        assert(name != null),
+        assert(price != null);
+
+  final Category category;
+  final int id;
+  final bool isFeatured;
+
+  // A function taking a BuildContext as input and
+  // returns the internationalized name of the product.
+  final String Function(BuildContext) name;
+
+  final int price;
+
+  String get assetName => '$id-0.jpg';
+  String get assetPackage => 'shrine_images';
+}