const {jwtSecret, jwtOptions} = require('config')
const jwt = require('jsonwebtoken')
const _ = require('lodash')

function generateJWTforUser (user = {}) {
  return Object.assign({}, user, {
    token: jwt.sign({
      sub: _.pick(user, ['email'])
    }, jwtSecret, jwtOptions)
  })
}

function getSelect (table, prefix, fields) {
  return fields.map(f => `${table}.${f} as ${prefix}_${f}`)
}

exports.generateJWTforUser = generateJWTforUser
exports.getSelect = getSelect