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

yarn add 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, false);

• createAction receive two arguments, the second argument is optional.
• The first argument is the action type.
• The second, and optional, argument is if the action will be an error one.
• This argument should be the defined action type string.
• It will return a function who will receive the action payload and meta data and return a valid (FSA compilant) action object.
• The action creator will receive two optional arguments, one with the action payload and another with the action meta data.

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.