Conventional-redux.js

Conventional-redux.js is a library for small and medium applications, it wraps the react-redux and provides API based on convention over configuration pattern. It is NOT new flux implementation so everything is in 100% compatible with standard redux approach.

The idea

Remove boilerplate code by adding conventions
Don't break any redux rule/idea
Handle basic stuff automatically with ability to override

The difference (counter example)

Standard redux module

// ------------------------------------
// Constants
// ------------------------------------
export const COUNTER_INCREMENT = 'COUNTER_INCREMENT'

// ------------------------------------
// Actions
// ------------------------------------
export function increment (value = 1) {
  return {
    type: COUNTER_INCREMENT,
    payload: value
  }
}

export const doubleAsync = () => {
  return (dispatch, getState) => {
    return new Promise((resolve) => {
      setTimeout(() => {
        dispatch(increment(getState().counter))
        resolve()
      }, 200)
    })
  }
}

export const actions = {
  increment,
  doubleAsync
}

// ------------------------------------
// Action Handlers
// ------------------------------------
const ACTION_HANDLERS = {
  [COUNTER_INCREMENT]: (state, action) => state + action.payload
}

// ------------------------------------
// Reducer
// ------------------------------------
const initialState = 0
export default function counterReducer (state = initialState, action) {
  const handler = ACTION_HANDLERS[action.type]

  return handler ? handler(state, action) : state
}

Conventional-redux interactor

class CounterInteractor {
  // initial state
  defaultState() {
    return 0;
  }

  // actions:
  doubleAsync() {
    setTimeout(() => { this.dispatch('counter:double') }, 500)
  }

  // reduce methods:
  onIncrement() {
    return this.state + 1;
  }

  onDouble() {
    return this.state * 2;
  }
}

Standard redux component + container

const mapActionCreators = {
  increment: () => increment(1),
  doubleAsync
}

const mapStateToProps = (state) => ({
  counter: state.counter
})

const Counter = (props) => (
  <div>
    <h2>{props.counter}</h2>
    
    <button onClick={props.increment}>
      Increment
    </button>
    
    <button onClick={props.doubleAsync}>
      Double (Async)
    </button>
  </div>
)

export default connect(mapStateToProps, mapActionCreators)(Counter)

Conventional-redux connected component

const Counter = (props, dispatch) => (
  <div>
    <h2>{props('counter')}</h2>
    
    <button onClick={dispatch('counter:increment')}>
      Increment
    </button>
    
    <button onClick={dispatch('counter:doubleAsync')}>
      Double (Async)
    </button>
  </div>
  )
}

export default connectInteractors(Counter, ['counter']);

Standard redux approach (explicit)

Define component
Define actions
Define reducer
Define mapActionCreators
Define mapStateToProps
Define container
Connect!

Conventional-redux approach

Define component
Define interactor
Connect!

Remember that you can combine these two approaches! Use convetional way for simple parts of your application, but when you need more control over what is going on, pure redux should be better!

Example live application

Check out an example app with code snippets here. The code is available here.

Functionalities list

Auto define actions

The library automatically defines actions based on reduce methods. Check out live example.

class CounterInteractor {
  defaultState() {
    return 0;
  }

  // You can still define increment by your own (but not need to)!
  // increment() {
  //   console.log('test');
  // }

  onIncrement(by = 1) {
    return this.state + by;
  }

  onDouble() {
    return this.state * 2;
  }
}

// dispatch examples:
// this.dispatch('counter:increment');
// this.d('counter:increment', 10);
// this.d('counter:double');

Auto handle for promises

Automatically handling for promises resolve and reject. Check out live example.

class GithubUserdataInteractor {
  defaultState() {
    return 0;
  }

  fetch(userName) {
    // need to return promise
    return fetchResource('https://api.github.com/users/' + userName)
  }

  onFetch(userName) {
    return { loading: true }
  }

  fetchSuccess(userResponse) {
    console.log(userResponse);
  }

  onFetchSuccess(userResponse) {
    return { user: userResponse }
  }

  onFetchError(error) {
    return { error: error.message }
  }
}

Interactor external dependencies

You can define an array of external dependencies to modify interactor state after non interactor actions. Check out live example.

class ExampleInteractor {
  externalDependencies() {
    return [
      { on: ['LOGOUT'], call: 'onClear' }
    ]
  }

   onClear(logoutActionArgs) {
     return {};
  }
}

Interactor computed actions

You can define a computed actions array to call additional dispatch after specific actions. In the following example the action always fires after projects:fetch or gists:fetch. Check out live example.

class FiltersInteractor {
  computedActions() {
    return [
      { after: ['projects:fetch', 'gists:fetch'],
        dispatch: 'filters:update',
        with: ['projects.languages', 'gists.languages'] 
      }
    ]
  }
  
  onUpdate(projectLanguages, gistLanguages) {
    // it fires after gists or projects fetch with resolved args
  }
}

Static and dynamic interactors

Interactors can be static or dynamic. You cannot remove once registered static interactor. Dynamic interactors can be remvoed or replaced, the right moment to manage dynamic interactors is ROUTE_CHANGE action. A good example of static interactor would be CurrentUserInteractor, of dynamic - route based interactors like ProjectsInteractor, SettingsInteractor etc. Check out live example.

// static, somewhere before connect:
registerInteractors({
  currentUser: new CurrentUserInteractor(),
  currentLanguage: new CurrentLanguageInteractor(),
});

// dynamic
onRouteChange() {
  replaceDynamicInteractors({
    counter: new CounterInteractor()
  });
}

// dynamic setup, configuring store
setRecreateReducerFunction(() => store.replaceReducer(createReducer(store.injectedReducers)));

Connect interactors

It connects interactors (state) to a specific component. Check out live example.

class Counter extends React.Component {
  render () {
    return (
      <div>
        <h2>{this.p('counter')}</h2>
        
        <button onClick={() => this.d('counter:increment')}>
          Increment
        </button>
        
        <button onClick={() => this.d('counter:doubleAsync')}>
          Double (Async)
        </button>
      </div>
    )
  }
}

export default connectInteractors(Counter, ['counter']);
// or connect all (not recommended)
export default connectInteractors(Counter);

Installation

1. Npm install

npm install conventional-redux --save

2. Add conventional-redux middleware

import { conventionalReduxMiddleware } from 'conventional-redux';
const middleware = [conventionalReduxMiddleware, thunk, routerMiddleware(history)]

Code example: https://github.com/mjaneczek/conventional-redux-demo/blob/master/app/configureStore.js#L12

3. Set recreate reducer function (needed only if using dynamic interactors)

setRecreateReducerFunction(() => store.replaceReducer(createReducer()));

Code example: https://github.com/mjaneczek/conventional-redux-demo/blob/master/app/configureStore.js#L35

4. Replace combineReducers with conventional-redux wrapper

import { createConventionalReduxRootReducer } from 'conventional-redux';

return createConventionalReduxRootReducer({
  route: routeReducer,
}, combineReducers);

// the first parameter is a default combined reducers hash
// the second is a pure combineReducers function from redux or redux-immmutable

Code example: https://github.com/mjaneczek/conventional-redux-demo/blob/master/app/reducers.js#L20

Example application

https://mjaneczek.github.io/conventional-redux-demo/

Deprecation note

The previous version of the library 0.2.2 has been deprecated. There are many breaking changes while migrating to 1.0, please be careful while updating. The outdated code is here: https://github.com/mjaneczek/conventional-redux/tree/0.2.2-outdated

Contributing

Fork it ( https://github.com/mjaneczek/conventional-redux/fork )
Create your feature branch (git checkout -b my-new-feature)
Commit your changes (git commit -am 'Add some feature')
Push to the branch (git push origin my-new-feature)
Create a new Pull Request

mjaneczek/conventional-redux

mjaneczek

Reviews

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