common_bloc

A collection of common blocs that maybe will be used very often.

Idea of this

Sometimes we need to create various blocs in the same project to do almost the same thing. This is a collection of blocs to no write so many code.

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Blocs

RestBloc

This is a bloc to make network requests over a REST API.

Usage

To use it, we need to create an instance:

final restBloc = RestBloc('<baseUrl>'); //BaseURL of REST API.

Also, we can pass a list of interceptors:

final restBloc = RestBloc('<baseUrl>', interceptors: []);

Uses the InterceptorContract class of http_interceptor package to listen to request and response.

After that, we can use the following methods:

restBloc.get('path'); // With optional params as a Map<String, String>.
restBloc.post('path', body: body); // With body as a String.
restBloc.put('path', body: body); // With body as a String.
restBloc.patch('path', body: body); // With body as a String.
restBloc.delete('path');

In all of the methods (except 'delete'), we have an optional param named: fromJson

restBloc.get('path', fromJson: fromJson);

This must be a Function to convert the response into an object. Expects to work with json_serilizable and BuiltValue

restBloc.get('path', fromJson: Data.fromJson);

In that, the 'data' object will be of that type.

States

As a bloc, we have states to manage the request and because is powered by freezed, we can use something like:

BlocBuilder<RestBloc, RestState>(
  bloc: restBloc,
  builder: (context, state) => state.when(
    uninitialized: () => Container(), //Widget for UninitializedState
    loading: () => Container(), //Widget for LoadingState
    error: (error) => Container(), //Widget for ErrorState
    loaded: (data, lastPath, timestamp) => Container() //Widget for LoadedState
  )
);

RequestBloc

This bloc will be used when we want to make a task, a request, o something that needs a response/data/result.

Usage

This bloc doesn't need params to be constructed.

final requestBloc = RequestBloc();

When we need to perform an action, we call:

requestBloc.perform(action, actionName);

'action' is a function that returns a Future to be resolved and will be the result.

'actionName' is a identifier of what we are doing.

requestBloc.perform(() async => 'Hi!', 'Waving');

States

This use the same states of RestBloc:

  • uninitialized
  • loading
  • error
  • loaded

In the future

  • Tab Bloc (for controlling tab behaviour).
  • Session Bloc.
  • Login/Register Bloc.
  • A suggestion?.

Libraries

common_bloc