reducer.js

import * as types from './constants';
import { find, near } from './utils';

export const initialState = {
  selectedFilters: [],
  find,
  near,
};

const filterListReducer = (state = initialState, action) => {
  switch (action.type) {
    case types.SET_USER_FILTER: {
      const { selectedFilters } = state;
      const copySelectedFilters = selectedFilters;
      const checked = copySelectedFilters.indexOf(action.payload) !== -1;
      if (checked) {
        const index = copySelectedFilters.indexOf(action.payload);
        selectedFilters.splice(index, 1);
      } else {
        copySelectedFilters.push(action.payload);
      }
      return {
        ...state,
        selectedFilters: copySelectedFilters,
      };
    }
    case types.TOGGLE_FIND_FILTER:
      return {
        ...state,
        find: action.payload,
      };
    case types.TOGGLE_NEAR_FILTER:
      return {
        ...state,
        near: action.payload,
      };
    default:
      return state;
  }
};

export default filterListReducer;