FINAL-PROJECT-FRONT/src/redux/contacts/reducer/index.ts

import isEqual from 'lodash.isequal';
import { createReducer } from '@reduxjs/toolkit';
import { IContactsState,IContactsPayload} from '../../../typescript/redux/contacts/interfaces';
import {
  actionGetContactsSuccess,
  actionGetContactsReject
} from '../action';

const initialState:IContactsState = {
  total: "0",
  limit: "0",
  page: "0",
  contacts: []
}

const reducerContacts = createReducer(initialState, {
  [actionGetContactsSuccess.type]: (state, { payload }: IContactsPayload) => {
    if (isEqual(state, payload) === false) return payload
    return state;
  },
  [actionGetContactsReject.type]: (state, _payload) => {
    return state;
  },
});

export default reducerContacts;