Facebook-Clone/frontend/components/mainpage/profile_page_container.js

import {updateUser,fetchUser} from '../../actions/session_actions';
import {withRouter} from 'react-router-dom';
import { connect } from 'react-redux';
import ProfilePage from './profile_page';
const mapStateToProps = (state,ownProps) => {
  const currentUserId = state.session.id ;
  return (
    {currentUser:state.entities.users[currentUserId],
     user: state.entities.users[ownProps.match.params.userId] }
  );

};

const mapDispatchToProps = dispatch => ({
  updateUser: (formData) => (dispatch(updateUser(formData))),
  fetchUser: (id) => (dispatch(fetchUser(id)))
});


export default withRouter(connect(mapStateToProps , mapDispatchToProps)(ProfilePage));