redbrogdon / rebloc Goto Github PK

Given the following code:

Default override fill in code:

@override
  FutureOr<Action> middleware(DispatchFunction dispatcher, ExpandingCardState state, Action action) {
    // TODO: implement middleware
    return super.middleware(dispatcher, state, action);
  }

or Modified to return action explicitly

class ConstraintBloc extends SimpleBloc<ExpandingCardState> {
  @override
  FutureOr<Action> middleware(DispatchFunction dispatcher, ExpandingCardState state, Action action) {
    // TODO: implement middleware
    return action;
  }
}

Why do I get the following analysis error?

'ConstraintBloc.middleware' ('((Action) → void, ExpandingCardState, Action) → dynamic') isn't a valid override of 'SimpleBloc.middleware' ('((Action) → void,

rebloc-0.2.1/lib/src/widgets.dart:10:1: Error: 'Action' is imported from both 'package:flutter/src/widgets/actions.dart' and 'package:rebloc/src/engine.dart'

patch to fix this: iyatsouba@42b405a

On the service, @felangel's bloc library seems to have a very similar api and intent. Wondering what some of the differences are?

I found the statelesswidget used in it all. Does this have any effect on performance?

a quick fix:

--- engine.dart
+++ engine.dart
@@ -104,8 +104,10 @@
 
     reducerStream.listen((a) {
       assert(a.state != null);
-      states.add(a.state);
-      _afterwareController.add(WareContext<S>(dispatcher, a.state, a.action));
+      if (a.action is! _CancelledAction) {
+        states.add(a.state);
+        _afterwareController.add(WareContext<S>(dispatcher, a.state, a.action));
+      }
     });
 
     // Without something listening, the afterware won't be executed.

I have a usecase in my app and I need to load the initial state by querying the SharedPreferences package.

How can I make the initial state of my app asynchronous?

Would you pleaser update RxDart to latest version (0.24.0)?
@RedBrogdon

Thanks for the great library rebloc. I am trying to figure out how I can use a SimpleBloc with a widget that has TextFields.

I have seen samples where the standard BLOC exposed streams and functions that access the sinks, and are wired to StreamBuilder that return the TextField.

If I used rebloc, would I have to maintain state and validate the TextField within the widget, and simply dispatch actions for something like the login passing the username/password?

I liked the separation and hidden logic within the standard BLOC, but not sure how to use a VIewModelSubscriber in place of a StreamBuilder while exposing Streams/Sinks from the SimpleBloc.

Hello @RedBrogdon

Thanks for the package, since I stumbled upon it, its been my number choice for state management.

This question has been asked before, so I took time out to repurpose one of my earlier projects from Redux to Rebloc.

You can have a look at TailorMade and maybe you can give a shout if it can serve as a pointer for others wanting to use this combination.

Jeremiah.

Hi,

In my bloc class I listen to location event. How can I dispatch an action on each event?

class TrackingBloc extends SimpleBloc<AppState> {
    ...
    bg.BackgroundGeolocation.onLocation((bg.Location location) {
        dispatcher(DoSomethinWithLocation(location));
    }
    ...
}

Thanks for the great library!
Could you help to update the dependencies to follow the latest release? Thanks!

Is it possible to use this app with AngularDart or VueDart?

If so, some examples would be awesome.

Since there is nowhere else to say this, Thank you @RedBrogdon.

This is super awesome!!

When I opened example, two errors occurred. Provide solutions for those in need.

First mistake, No toolchains found in the NDK toolchains folder for ABI with prefix: mips64el-linux-android.

Solution, go to the official website to download "Android NDK, Revision 16b", and then put the "mips64el-linux-android-4.9" in "Android\sdk\ndk-bundle".
https://developer.android.com/ndk/downloads/older_releases

Second mistake, Failed to execute aapt.

Solution, in "android/app/build.gradle", modify "compileSdkVersion" to 28.

Nice redesign of the redux ideas. I've been doing something similar (still WIP), but with blocs keeping their state as an accumulated state in a stream, using the stream's scan() to call its reducer.

What seems to be missing in rebloc, but what I used frequently with react-redux in the past, is the ability to execute middleware functions after the reducer(s) have changed the state. For example, after changing the state you may want to perform some external actions, like logging, sending a network message about the finished action (MQTT in my case), etc. In react-redux, everything after next(action) in the middleware function could do this.

Wondering whether you could think about how to add this functionality in some way to rebloc.

I think this plugin is so brilliant and make state management much easier!
Thank you so much.
However I would like to know how to update UI when Firestore data changed or created in this plugin. For instance, when you put a new item in shopping cart, cart icon's number updates like flutter talk in IO. Since bloc attached to this plugin, I think I should put login in there but I'm not sure how to do it. Could you give an example?
Again thank you for great plugin.

First of all, thank you @RedBrogdon for create such a good library. I very appriciate it.
(Also a lot of good episodes on boring flutter that I love to watch)

But one thing I want to mention is the readme document on https://pub.dartlang.org/packages/rebloc#-readme-tab- have a typo

I saw that you've fixed it in your commit but it's not propogate to pub.dartlang.org yet.
Could you help correct it? (for a good impression of new comer)

Cheer!!