#!/usr/bin/env node

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* scripts/gen_valid_keys.js creates public and private keys suitable for
   use with VAPID in push notifications.

   Usage:
   ./scripts/gen_valid_keys.js [filename]

   The filename will default to:

       ./config/vapid-keys.json

   If this file already exists, this script will show an error message
   and exit. You must remove the file if you want to generate a new
   keypair.
*/

'use strict'

const fs = require('fs')
const config = require('../config')
const webpush = require('web-push')

const vapidKeysFile = config.get('vapidKeysFile')

var fileExists = fs.existsSync(vapidKeysFile)
if (fileExists) {
  console.log('keys file already exists')
  process.exit()
}

console.error('Generating key for VAPID')

var keys = webpush.generateVAPIDKeys()
fs.writeFileSync(vapidKeysFile, JSON.stringify({
  privateKey: keys.privateKey.toString('base64'),
  publicKey: keys.publicKey.toString('base64')
}))

console.error('Done:', vapidKeysFile)