main.js

import Koa from 'koa'
import historyApiFallback from 'koa-connect-history-api-fallback'

const app = new Koa()
// trust proxy
app.proxy = true

// sessions
const convert = require('koa-convert')
const session = require('koa-generic-session')
app.keys = ['your-session-secret']
app.use(convert(session()))

// body parser
const bodyParser = require('koa-bodyparser')
app.use(bodyParser())

// authentication
require('./lib/authn')
const passport = require('koa-passport')
app.use(passport.initialize())
app.use(passport.session())

// routes
const fs    = require('fs')
const route = require('koa-route')

app.use(route.get('/logout', function(ctx) {
  ctx.logout()
  ctx.redirect('/login')
}))

app.use(route.get('/login',
  passport.authenticate('oauth2')
))

app.use(route.get('/oauth/callback',
  passport.authenticate('oauth2', {
    failureRedirect: '/login',
    successRedirect: '/'
  })
))

// Require authentication for now
app.use(function(ctx, next) {
  if (ctx.isAuthenticated()) {
    return next()
  } else {
    ctx.redirect('/login')
    // ctx.status = 401
  }
})

// rewrite to index.html
app.use(convert(historyApiFallback({
  verbose: false
})))

// static
const serve = require('koa-static')
app.use(convert(serve('dist', { defer: true })))

app.use(route.get('/', function(ctx, next) {
  const user = ctx.req.user
  if (!user.access_token) {
    console.log('no token, moving to static')
    return next()
  }
  const referrer = ctx.headers['referer']
  const redir = (referrer) ? referrer : '/'

  console.log("redirecting to: %s", redir)
  return ctx.redirect(redir + `token/${user.access_token}`)
}))

export default app