donymarulloh / flutter-repository-pattern

Flutter Repository Pattern

This repo demonstrates using the repository pattern for layering your architecture.

In this design the view utilizes a generic interface to get and set data against the repository. That specification can be setup in an abstract class such as:

``dart

abstract class BookRepository { Stream<List> getAll(); Future<Book?> getOne(int id); Future insert(Book book); Future update(Book book); Future delete(int id); }

This class is the implemented by with the concrete class

```dart

class BookRepositoryLocal implements BookRepository {

Alternatively for testing one class can implement another such as

class BookRepositoryRemote implements BookRepositoryLocal {

Both models work and allow the use of a base interface, in this case both classes end up implementing BookRepository

    //BookRepository bookRepo = BookRepositoryLocal();
    BookRepository bookRepo = BookRepositoryRemote();
    Stream<List<Book>> books = bookRepo.getAll();