util.js

// import npm modules
import axios from 'axios';
import jwt from 'jsonwebtoken';

// import custom utilities
import config from '../../config';

const personalization = data => {
	// setup promise
	return new Promise((resolve, reject) => {
		
		// build jwt for signing the API call
		const token = jwt.sign(
			{
				action: '*',
				feed_id: '*',
				resource: '*',
				user_id: '*',
			},
			config.stream.apiSecret,
			{ algorithm: 'HS256', noTimestamp: true },
		);

// initiate call via axios (http module)
		return axios({
			baseURL: config.stream.baseUrl,
			headers: {
				Authorization: token,
				'Content-Type': 'application/json',
				'Stream-Auth-Type': 'jwt',
			},
			method: 'GET',
			params: {
				api_key: config.stream.apiKey,
				user_id: data.userId,
			},
			url: data.endpoint,
		})
			.then(res => {
				// map over results and deserialize
				const data = res.data.results.map(result => {
					return result.foreign_id.split(':')[1];
				});
				// successfully resolve call and return deserialized data
				resolve(data);
			})
			.catch(err => {
				// catch and reject with error
				reject(err);
			});
	});
};

export default personalization;