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server.js
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server.js
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require('dotenv').load()
const path = require('path')
const koa = require('koa')
const koaRouter = require('koa-router')
const static = require('koa-static')
const render = require('koa-ejs')
const bodyParser = require('koa-bodyparser')
const session = require('koa-session')
const uuidv1 = require('uuid/v1')
const app = new koa()
const router = new koaRouter()
const Notifier = require('./src/Notifier')
const SubscriptionStore = require('./src/SubscriptionStore')
const {
KOA_APP_SECRET,
FACEBOOK_APP_ID,
FACEBOOK_HUB_CHALLENGE_VERIFY_TOKEN,
NODE_ENV
} = process.env
const DEV = (NODE_ENV === 'development')
app.keys = [KOA_APP_SECRET]
const notifier = new Notifier()
const subscriptionStore = new SubscriptionStore()
// Session users until we get all the information required
// for a Santa Delivery Notification
const sessionUsers = {}
app.use(session(app))
app.use(static('public/'))
app.use(bodyParser())
render(app, {
root: path.join(__dirname, 'views'),
viewExt: 'html',
layout: false,
cache: false,
debug: false
});
router.get('/', (ctx) => {
if (sessionUsers[ctx.session.sessionId] === undefined) {
const userUUID = uuidv1()
ctx.session.sessionId = userUUID
sessionUsers[userUUID] = {
uuid: userUUID,
coords: {},
tel: null,
facebook_page_specific_id: null
}
}
else {
console.log('user exists')
console.log(sessionUsers[ctx.session.sessionId])
}
return ctx.render('index', {
user: sessionUsers[ctx.session.sessionId],
CONFIG: {FACEBOOK_APP_ID: FACEBOOK_APP_ID}
})
})
// Allow for FB Webhook to be setup
router.get('/fb_subscribe', (ctx) => {
if(ctx.request.query['hub.verify_token'] === FACEBOOK_HUB_CHALLENGE_VERIFY_TOKEN &&
ctx.request.query['hub.challenge']) {
ctx.response.body = ctx.request.query['hub.challenge']
}
ctx.status = 200
})
// Handle FB Messenger opt-in subscribe webhook
router.post('/fb_subscribe', async (ctx) => {
const messageContext = ctx.request.body.entry[0].messaging[0]
const uuid = messageContext.optin.ref
const fbPageSpecificUserId = messageContext.sender.id
const sessionUser = sessionUsers[uuid]
sessionUser.facebook_page_specific_id = fbPageSpecificUserId
let httpStatus = null
let subscriptionResult = null
try {
subscriptionResult = await subscriptionStore.addSubscription(sessionUser)
notifier.sendSubscriptionConfirmation(subscriptionResult)
}
catch(error) {
console.error(error)
}
console.log('/fb_subscribe result')
console.log(subscriptionResult)
// Always return 200 to Facebook
ctx.status = 200
})
// Get user data following Messenger subscribe
router.post('/user_data', async (ctx) => {
const sessionUser = sessionUsers[ctx.session.sessionId]
sessionUser.coords = ctx.request.body.coords
sessionUser.tel = ctx.request.body.tel
if(sessionUser.coords) {
const heading = await notifier.getSantaHeading(sessionUser.coords.lat, sessionUser.coords.lng)
sessionUser.location_text = heading.data.nearest.name
}
console.log('sessionUser updated via /user_data')
console.log(sessionUser)
ctx.body = sessionUser
ctx.status = 200
})
// Nexmo routes
router.post('/status', (ctx) => {
console.log('/status')
console.log(ctx.request.body)
ctx.status = 200
})
router.post('/inbound', (ctx) => {
console.log('/inbound')
console.log(ctx.request.body)
ctx.status = 200
})
// Useful development/debug routes
router.get('/check_all_subscriptions', async (ctx) => {
if(!DEV) {
ctx.status = 401
return
}
const subscriptions = await subscriptionStore.getPendingNotifications()
console.log(subscriptions)
subscriptions.forEach(async subscription => {
console.log(subscription)
const checkResult = await notifier.checkDeliveryNotification(subscription)
if(checkResult.sent) {
subscription.notification_sent = true
// update store
subscriptionStore.updateSubscription(subscription)
}
})
ctx.status = 202
})
router.get('/subscriptions', async (ctx) => {
if(!DEV) {
ctx.status = 401
return
}
ctx.body = await subscriptionStore.getNotifications()
})
router.get('/pending_subscriptions', async (ctx) => {
if(!DEV) {
ctx.status = 401
return
}
ctx.body = await subscriptionStore.getPendingNotifications()
})
router.get('/session_users', (ctx) => {
if(!DEV) {
ctx.status = 401
return
}
ctx.body = sessionUsers
})
router.get('/kill_session', (ctx) => {
if(!DEV) {
ctx.status = 401
return
}
ctx.session = null
ctx.status = 204
})
app.use(router.routes())
.use(router.allowedMethods())
const port = process.env.PORT || 1234
app.listen(port, () => console.log('server listening on port', port))