Helper function to create Redux modules using the ducks-modular-redux proposal.

npm i -S redux-duck

import { createDuck } from 'redux-duck';

const myDuck = createDuck('duck-name', 'application-name');

• createDuck receive 2 arguments, the second argument is optional.
• The first argument is the duck name.
• The second, and optional, argument is the application or module name.

const ACTION_TYPE = myDuck.defineType('ACTION_TYPE');

• defineType receive just one argument.
• The argument is the name of the action.
• The result should be an string like application-name/duck-name/ACTION_TYPE or duck-name/ACTION_TYPE if the application or module name was not defined.

const actionType = myDuck.createAction(ACTION_TYPE);

• createAction receive just one argument.
• This argument should be the defined action type string.
• It should return a function who will receive the action payload and return a valid (FSA compilant) action object.
• The action creator will receive an optional argument with the action payload.

const initialState = {
  list: Immutable.List(),
  data: Immutable.Map(),
};

const reducer = myDuck.createReducer({
  [ACTION_TYPE]: (state, action) => ({
    ...state,
    list: state.list.push(action.payload.id),
    data: state.map.set(action.payload.id+'', action.payload),
  }),
}, initialState);

• createReducer receive two arguments, both required.
• The first argument is an object with the possible action cases.
• The second argument is the reducer initial state.
• The first argument should use the previously defined action types as keys.
• Each key in the first argument object should be a function who will receive the current state and the dispatched action as arguments and return the updated state.