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index.js
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index.js
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import WebSocket from 'ws'
import express from 'express'
import axios from 'axios'
import bodyParser from 'body-parser'
import npmlog from 'npmlog'
import morgan from 'morgan'
import Sequelize from 'sequelize'
const app = express()
const serverKey = process.env.SERVER_KEY || ''
const port = process.env.PORT || 3000
const wsStorage = {}
const sequelize = new Sequelize('sqlite://tusky.sqlite', {
logging: npmlog.verbose,
storage: 'db/tusky.sqlite'
})
const connectForUser = (baseUrl, accessToken, deviceToken) => {
const log = (level, message) => npmlog.log(level, `${baseUrl}:${deviceToken}`, message)
if (typeof wsStorage[`${baseUrl}:${accessToken}`] !== 'undefined') {
log('info', 'Already registered')
return
}
let heartbeat
log('info', 'New registration')
const close = () => {
clearInterval(heartbeat)
disconnectForUser(baseUrl, accessToken)
}
const onMessage = data => {
const json = JSON.parse(data)
log('info', `New notification: ${json.event}`)
if (json.event !== 'notification') {
return
}
const payload = JSON.parse(json.payload)
const firebaseMessage = {
to: deviceToken,
priority: 'high',
data: { notification_id: payload.id }
}
axios.post('https://fcm.googleapis.com/fcm/send', JSON.stringify(firebaseMessage), {
headers: {
'Authorization': `key=${serverKey}`,
'Content-Type': 'application/json'
}
}).then(response => {
log('info', `Sent to FCM, status ${response.status}: ${JSON.stringify(response.data)}`)
if (response.data.failure === 0 && response.data.canonical_ids === 0) {
return
}
response.data.results.forEach(result => {
if (result.message_id && result.registration_id) {
Registration.findOne({ where: { instanceUrl: baseUrl, accessToken: accessToken }}).then(registration => registration.update({ deviceToken: result.registration_id }))
} else if (result.error === 'NotRegistered') {
close()
}
})
}).catch(error => {
log('error', `Error sending to FCM, status: ${error.response.status}: ${JSON.stringify(error.response.data)}`)
})
}
const onError = error => {
log('error', error)
setTimeout(() => reconnect(), 5000)
}
const onClose = code => {
if (code === 1000) {
log('info', 'Remote server closed connection')
clearInterval(heartbeat)
close()
return
}
log('error', `Unexpected close: ${code}`)
setTimeout(() => reconnect(), 5000)
}
const reconnect = () => {
clearInterval(heartbeat)
const ws = new WebSocket(`${baseUrl}/api/v1/streaming/?access_token=${accessToken}&stream=user`)
ws.on('open', () => {
if (ws.readyState != 1) {
log('error', `Client state is: ${ws.readyState}`)
} else {
log('info', 'Connected')
heartbeat = setInterval(() => ws.ping(), 1000)
}
})
ws.on('message', onMessage)
ws.on('error', onError)
ws.on('close', onClose)
wsStorage[`${baseUrl}:${accessToken}`] = ws;
}
reconnect()
}
const disconnectForUser = (baseUrl, accessToken) => {
Registration.findOne({ where: { instanceUrl: baseUrl, accessToken: accessToken }}).then((registration) => {
if (registration != null) {
registration.destroy()
}
})
const ws = wsStorage[`${baseUrl}:${accessToken}`]
if (typeof ws !== 'undefined') {
ws.close()
delete wsStorage[`${baseUrl}:${accessToken}`]
}
}
const Registration = sequelize.define('registration', {
instanceUrl: {
type: Sequelize.STRING
},
accessToken: {
type: Sequelize.STRING
},
deviceToken: {
type: Sequelize.STRING
}
})
Registration.sync()
.then(() => Registration.findAll())
.then(registrations => registrations.forEach(registration => {
connectForUser(registration.instanceUrl, registration.accessToken, registration.deviceToken)
}))
app.use(morgan('combined'));
app.use(bodyParser.urlencoded({ extended: true }))
app.get('/', (req, res) => {
res.sendStatus(204)
})
app.post('/register', (req, res) => {
Registration.findOrCreate({ where: { instanceUrl: req.body.instance_url, accessToken: req.body.access_token, deviceToken: req.body.device_token }})
connectForUser(req.body.instance_url, req.body.access_token, req.body.device_token)
res.sendStatus(201)
})
app.post('/unregister', (req, res) => {
disconnectForUser(req.body.instance_url, req.body.access_token)
res.sendStatus(201)
})
app.listen(port, () => {
npmlog.log('info', `Listening on port ${port}`)
})