@boomerang-io/utils/lib/createReducer/createReducer.js

A library of reusable utilities and hooks for React webapps on the Boomerang platform.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
/**
 * Reducer boilerplate to create reducers
 *
 * @param {Obj} initialState - intial state of reducer
 * @param {Obj} actionHandlers - action types and what they do to state
 * @example
 * const initialState = {
 * 	fetchingState: "",
 * 	data: []
 * }
 * const actionHandlers = {
 * 	APPS_OVERVIEW_RESET: () => {
 *    return { ...initialState };
 *  },
 * 	FETCH_APPS_OVERVIEW_REQUEST: state => {
 *    return { ...state, fetchingState: "fetching" };
 *  },
 * 	FETCH_APPS_OVERVIEW_SUCCESS: (state, action) => {
 *    return { ...state, data: action.data, fetchingState: "success" };
 *  },
 * 	FETCH_APPS_OVERVIEW_FAILURE: state => {
 *    return { ...state, data: [], fetchingState: "failure" };
 *  }
 * };
 *
 * export default createReducer(initialState, actionHandlers);
 */
const createReducer = (initialState, actionHandlers) => {
  return function reducer() {
    let state = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : initialState;
    let action = arguments.length > 1 ? arguments[1] : undefined;
    if (Boolean(actionHandlers[action.type]) && typeof actionHandlers[action.type] === "function") {
      return actionHandlers[action.type](state, action);
    } else {
      return state;
    }
  };
};
var _default = exports.default = createReducer;