serverRender.js

import React from 'react';
import ReactDOMServer from 'react-dom/server';

import App from './src/component/App';

import config from './config';
import axios from 'axios';
const getApiUrl = contestId =>{
	if(contestId){
		return `${config.serverUrl}/api/contest/${contestId}`;
	}
	return `${config.serverUrl}/api/contests`;
};

const getInitialData = (contestId , apiData) => {
	if(contestId){
		return {
			currentContestId:apiData._id,
			contests: {
				[apiData._id]:apiData
			}
		};
	}
	return {
		contests : apiData.contests
	};
};
const serverRender = (contestId) => {

	return 	axios.get(getApiUrl(contestId))
		.then(resp => {
			const initialData = getInitialData(contestId , resp.data);
			return {
				initialMarkup : ReactDOMServer.renderToString(
					<App initialData={initialData}/>
				),
				initialData
			};
		});
};

export default serverRender;