@maderaunified/musd-saml/config/functions.js

require( 'dotenv' ).config();

const jwt     = require( 'jsonwebtoken' );
const fs      = require( 'fs' );
const path    = require( 'path' );
const Cookies = require( 'cookies' );
const config  = require( '../config/config' );

const key = fs.readFileSync( path.resolve( process.env.KEY_PATH ) );
const pub = fs.readFileSync( path.resolve( process.env.PUB_KEY_PATH ) );

const self = {};

self.isAuth = req => !!req.isAuthenticated();

self.getToken = user => jwt.sign( user, key, { algorithm : 'RS256' } );

const verifyToken = ( token ) => {

	let decoded = {};

	try {
		decoded = jwt.verify( token, pub, { algorithms : ['RS256'] } );
	}
	catch ( e ) {
		return undefined;
	}

	return decoded;

};

const getTokenFromRequest = ( req, res ) => {

	const cookies = new Cookies( req, res );

	try {
		return cookies.get( 'musd_id' );
	}
	catch ( e ) {
		return undefined;
	}

};

self.cookieExists = ( req, res ) => {
	const JWTToken = getTokenFromRequest( req, res );

	if ( !JWTToken ) {
		return false;
	}

	return verifyToken( JWTToken );

};

self.JWTValidation = ( req, res, next ) => {

	const JWTToken = getTokenFromRequest( req, res );

	if ( !JWTToken ) {
		res.json( {
			success    : true,
			redirectTo : `https://${req.headers.host}${config.routes.login}`,
			redirect   : true
		} );
	}
	else {
		const validate = verifyToken( JWTToken );

		if ( !validate ) {
			res.json( {
				success    : true,
				redirectTo : `https://${req.headers.host}${config.routes.login}`,
				redirect   : true
			} );
		}

		next();
	}

};

self.deleteCookie = ( req, res ) => {
	const cookies = new Cookies( req, res );

	cookies.set( 'musd_id' );
};

module.exports = self;