fix: change the DataState in usecase

update the DataState class in usecase with the new changes, correct typo in product_bloc_test.dart

linked #16

terminal/lib/features/product/data/repository/product_repository_impl.dart

@@ -17,10 +17,10 @@ class ProductRepositoryImpl implements ProductRepository {
       // If the server did return a 200 OK response,
       // then parse the JSON.
       Product product = Product.fromJson(jsonDecode(response.body) as Map<String, dynamic>);
-      return DataSuccess(product);
+      return Success(product);
     } else {
       List messages = ["Error"];
-      return DataFailed(messages);
+      return Error(messages);
     }
   }
 
@@ -31,13 +31,13 @@ class ProductRepositoryImpl implements ProductRepository {
       if(response.statusCode == 200){
         List body = json.decode(response.body);
         List products = body.map((e) => Product.fromJson(e)).toList();
-        return DataSuccess(products);
+        return Success(products);
       }else{
         List messages = ["Error"];
-        return DataFailed(messages);
+        return Error(messages);
       }
     }catch(err){
-      return DataFailed([err.toString()]);
+      return Error([err.toString()]);
     }
 
   }

terminal/lib/features/product/domain/usecase/get_all_products.dart

@@ -13,11 +13,11 @@ class GetAllProducts implements UseCase<List<Product>, void> {
   Future<List<Product>> call({void params}) async {
     DataState result = await productRepository.getAllProducts();
     try {
-      if (result is DataSuccess) {
+      if (result is Success) {
         //return product list
         return result.data;
       } else {
-        throw Exception("Didn't get products ; ${result.errorMessage}");
+        throw Exception("Didn't get products ; ${result.error.toString()}");
       }
     } catch (err) {
       // return empty array

terminal/lib/features/product/domain/usecase/get_product.dart

@@ -13,11 +13,11 @@ class GetProduct implements UseCase<Product?, int> {
     if(params != null){
       DataState result = await productRepository.getProduct(params);
       try {
-        if (result is DataSuccess) {
+        if (result is Success) {
           //return product
           return result.data;
         } else {
-          throw Exception("This product is not found ; ${result.errorMessage}");
+          throw Exception("This product is not found ; ${result.error.toString()}");
         }
       } catch (err) {
         // return null TODO à changer

terminal/lib/main.dart

@@ -1,7 +1,8 @@
 import 'package:flutter/material.dart';
-import 'package:terminal/features/transaction/presentation/check_scan.dart';
 import 'package:terminal/injection_container.dart';
 
+import 'config/app_router.dart';
+
 void main() async {
   await initializeDependencies();
   runApp( const MyApp());