Add models and sdk services example

lib/sdk/services/CategoryService.dart

@@ -1,7 +0,0 @@
-import 'package:sample_dart_dsdk/sdk/models/CategoryModel.dart';
-
-class CategoryService {
-  List<Category> getAll() {
-    return List.empty();
-  }
-}

lib/sdk/services/ProductService.dart

@@ -1,15 +0,0 @@
-import 'package:sample_dart_dsdk/sdk/models/ProductModel.dart';
-
-class ProductService {
-  List<Product> getAll() {
-    return List.empty();
-  }
-
-  Product getOne() {
-    return Product.fromJson(null);
-  }
-
-  Product create() {
-    return Product.fromJson(null);
-  }
-}

lib/sdk/services/base.dart

@@ -0,0 +1,11 @@
+abstract class BaseService<T, ID> {
+  Future<List<T>> findAll();
+
+  Future<T> findById(ID id);
+
+  Future<T> create(T entity);
+
+  Future<T> update(T entity);
+
+  Future<void> delete(ID id);
+}

lib/sdk/services/category.dart

@@ -0,0 +1,39 @@
+import 'package:sample_sdk/sdk/models/category.dart';
+import 'package:sample_sdk/sdk/services/base.dart';
+
+class CategoryService extends BaseService<Category, int> {
+  final List<Category> _categories = [
+    Category(id: 1, name: 'Category 1'),
+    Category(id: 2, name: 'Category 2'),
+    Category(id: 3, name: 'Category 3'),
+  ];
+
+  @override
+  Future<Category> create(Category entity) {
+    _categories.add(entity);
+    return Future.value(entity);
+  }
+
+  @override
+  Future<void> delete(int id) {
+    _categories.removeWhere((element) => element.id == id);
+    return Future.value();
+  }
+
+  @override
+  Future<List<Category>> findAll() {
+    return Future.value(_categories);
+  }
+
+  @override
+  Future<Category> findById(int id) {
+    return Future.value(_categories.firstWhere((element) => element.id == id));
+  }
+
+  @override
+  Future<Category> update(Category entity) {
+    final index = _categories.indexWhere((element) => element.id == entity.id);
+    _categories[index] = entity;
+    return Future.value(entity);
+  }
+}

lib/sdk/services/product.dart

@@ -0,0 +1,64 @@
+import 'package:sample_sdk/sdk/models/category.dart';
+import 'package:sample_sdk/sdk/models/product.dart';
+import 'package:sample_sdk/sdk/services/base.dart';
+
+class ProductService extends BaseService<Product, int> {
+  final List<Product> _products = [
+    Product(
+      id: 1,
+      name: 'Product 1',
+      price: 100.0,
+      category: Category(
+        id: 1,
+        name: 'Category 1',
+      ),
+    ),
+    Product(
+      id: 2,
+      name: 'Product 2',
+      price: 200.0,
+      category: Category(
+        id: 2,
+        name: 'Category 2',
+      ),
+    ),
+    Product(
+      id: 3,
+      name: 'Product 3',
+      price: 300.0,
+      category: Category(
+        id: 3,
+        name: 'Category 3',
+      ),
+    ),
+  ];
+
+  @override
+  Future<Product> create(Product entity) {
+    _products.add(entity);
+    return Future.value(entity);
+  }
+
+  @override
+  Future<void> delete(int id) {
+    _products.removeWhere((element) => element.id == id);
+    return Future.value();
+  }
+
+  @override
+  Future<List<Product>> findAll() {
+    return Future.value(_products);
+  }
+
+  @override
+  Future<Product> findById(int id) {
+    return Future.value(_products.firstWhere((element) => element.id == id));
+  }
+
+  @override
+  Future<Product> update(Product entity) {
+    final index = _products.indexWhere((element) => element.id == entity.id);
+    _products[index] = entity;
+    return Future.value(entity);
+  }
+}