packages/wyatt_architecture/README.md

@@ -50,10 +50,10 @@ class Photo extends Entity {
 }
 ```
 
-Then create the data sources by extending `BaseLocalDataSource` or `BaseRemoteDataSource` depending the type of data source.
+Then create the data sources by extending `BaseDataSource` :
 
 ```dart
-abstract class PhotoRemoteDataSource extends BaseRemoteDataSource {
+abstract class PhotoRemoteDataSource extends BaseDataSource {
   Future<Photo> getPhoto(int id);
   Future<List<Photo>> getAllPhotos({int? start, int? limit});
 }
@@ -78,14 +78,31 @@ Several use cases are supported :
 * Classic usecase :
 
 ```dart
-class Test extends AsyncUseCase<QueryParameters, List<Photo>>> {
+class RetrieveAllAlbums extends AsyncUseCase<QueryParameters, List<Album>> {
+  const RetrieveAllAlbums(this._photoRepository);
+  final PhotoRepository _photoRepository;
 
   @override
-  FuturOrResult<List<Photo>>> call(QueryParameters? params) {
+  FutureOrResult<List<Album>> execute(QueryParameters params) {
-     final photos = _photoRepository.getAllPhotos(
+    final albums = _photoRepository.getAllAlbums(
       start: params.start,
       limit: params.limit,
     );
+    return albums;
+  }
+}
+```
+
+* No parameter usecase :
+
+```dart
+class DisplayFavorites extends NoParamsAsyncUseCase<List<Photo>> {
+  const DisplayFavorites(this._photoRepository);
+  final PhotoRepository _photoRepository;
+
+  @override
+  FutureOrResult<List<Photo>> execute() {
+    final photos = _photoRepository.getAllPhotosFromFavorites();
     return photos;
   }
 }
@@ -94,48 +111,51 @@ class Test extends AsyncUseCase<QueryParameters, List<Photo>>> {
 You can add alternatve scenarios and check pre/post conditions using our extensions :
 
 ```dart
-class SearchPhotos extends AsyncUseCase<QueryParameters, List<Photo>>> {
+class RetrieveAllAlbums extends AsyncUseCase<QueryParameters, List<Album>> {
+  const RetrieveAllAlbums(this._photoRepository);
+  final PhotoRepository _photoRepository;
 
   @override
-  FutureOrResult<List<Photo>>> call(QueryParameters? params) {
+  FutureOrResult<List<Album>> execute(QueryParameters params) {
-     final photos = _photoRepository.getAllPhotos(
+    final albums = _photoRepository.getAllAlbums(
       start: params.start,
       limit: params.limit,
     );
-    return photos;
+    return albums;
   }
 
   @override
   FutureOr<void> onStart(QueryParameters? params) {
-    if(params.start == null || params.limit == null){
+    if (params.start < 0) {
-      throw ClientException('Préconndition non valides');
+      throw const ClientException('Invalid start parameter');
     }
   }
-
 }
 ```
 
-You can implement error scenarios overriding `onError` , or check postconditions by overriding `onComplete` .
+You can implement error scenarios overriding `onException` , or check postconditions by overriding `onComplete` .
 
 * Stream usecase :
 
 ```dart
-class SearchPhotos extends StreamUseCase<QueryParameters, List<Photo>>> {
+class RetrieveAllAlbums extends AsyncUseCase<QueryParameters, List<Album>> {
+  const RetrieveAllAlbums(this._photoRepository);
+  final PhotoRepository _photoRepository;
 
   @override
-  FutureOrResult<Stream<List<Photo>>>> call(QueryParameters? params) {
+  FutureOrResult<List<Album>> execute(QueryParameters params) {
-     final photos = _photoRepository.getAllPhotos(
+    final albums = _photoRepository.getAllAlbums(
       start: params.start,
       limit: params.limit,
     );
-    return photos;
+    return albums;
   }
 
+  @override
+  FutureOrResult<List<Album>> onException(Object e) => Ok([]);
 }
 ```
 
-On this case, observers allow you to add alternative scenarios when data changed, overriding `onData` or `onDone` .
-
 Please note that to use handlers, call `call` method and not `execute` .
 
 > In fact, here we need a new parameter object, so let's create it: