ItemTypeReducer.js

import * as actionTypes from '../../constants/actionTypes';

const initialState = {
  selected: ['Hotel'],
}

export default function itemTypeReducer(state = initialState, action) {
  let selected = state.selected.slice(0);
  let newArray = null;

  if (action.type == actionTypes.TOGGLE_ITEM_TYPE) {
    if (selected.indexOf(action.itemType) >= 0) {
      newArray = selected.filter((item) => {
        return item != action.itemType
      });
      return {
        selected: newArray
      }
    } else {
      newArray = selected.concat([action.itemType])
      return {
        selected: newArray
      }
    }
  }

  return state;
}