reducer.js

import React from 'react';
import { SUCCESS_FETCH_BRANCHES } from '../actions';

const repositories = (state = {}, action = []) => {
  switch (action.type) {
    case SUCCESS_FETCH_BRANCHES: {
      return { ...state, branches: state.branches.concat(action.branches), branchesNextPage: action.nextPage };
    }

    default: {
      return state;
    }
  }

  return state;
};

export default repositories;