n1lesh/fcm1.js

## fcm1.js
'use strict'

const app = require('express')(),
    request = require('request'),
    mongo = require('mongodb'),
    bodyParser = require('body-parser')

app.use(bodyParser.json())
app.use(bodyParser.urlencoded({
    extended: false
}))

const MongoClient = mongo.MongoClient

const url = 'mongodb://localhost:27017/myDatabase'

## fcm2.js
app.get('/notifications', (req, res) => {
    res.sendFile(__dirname + '/notifcenter.html')
})

app.post('/store', (req, res) => {

    MongoClient.connect(url, (err, db) => {
        if (err) throw err
        else {
            db.collection('tokens').insertOne(req.body, (err, body) => {
                if (err) throw err
                res.sendStatus(200)
            })
        }
        db.close()
    })
})

## fcm3.js
const sendNotifications = (data) => {

    const dataString = JSON.stringify(data)

    const headers = {
        'Authorization': 'key=<your firebase legacy server key>',
        'Content-Type': 'application/json',
        'Content-Length': dataString.length
    }

    const options = {
        uri: 'https://fcm.googleapis.com/fcm/send',
        method: 'POST',
        headers: headers,
        json: data
    }

    request(options, function (err, res, body) {
        if (err) throw err
        else console.log(body)
    })
}

## fcm4.js
const sendToTopics = (msg, title, topic, response) => {

    const data = {
        "data": {
            "body": msg,
            "title": title
        }
    }

    data['to'] = '/topics/' + topic

    sendNotifications(data)

    response.sendStatus(200)
}

## fcm5.js
const sendToAll = (msg, title, regIdArray, response) => {

    const data = {
        "data": {
            "body": msg,
            "title": title
        }
    }

    const folds = regIdArray.length % 1000

    for (let i = 0; i < folds; i++) {
        let start = i * 1000,
            end = (i + 1) * 1000

        data['registration_ids'] = regIdArray.slice(start, end).map((item) => {
            return item['token']
        })

        sendNotifications(data)
    }

    response.sendStatus(200)
}

## fcm6.js
app.post('/notify', (req, res) => {

    let msg = req.body.message,
        title = req.body.title,
        type = req.body.type,
        topic = req.body.topic

    if (type === 'topic') {
        sendToTopics(msg, title, topic, res)
    } else {
        MongoClient.connect(url, function (err, db) {
            if (err) throw err
            else {
                db.collection('tokens').find({}).toArray((err, docs) => {
                    sendToAll(msg, title, docs, res)
                })
            }
            db.close()
        })
    }
})

app.listen(8000)

## notifcenter.html
<!DOCTYPE html>
<html>

<head>
    <title>Notification Center</title>
    <style>
        body {
            text-align: center;
        }

        h1 {
            font-size: 40px;
            font-family: Verdana, Geneva, Tahoma, sans-serif;
            color: #444;
        }

        input[type=text] {
            width: 300px;
            margin: 0 auto;
            display: block;
        }

        .border {
            padding: 15px;
            border-color: #7a7a7a;
            border-style: solid;
            font-family: Verdana, Geneva, Tahoma, sans-serif;
            border-width: 2px;
            border-radius: 3px;
        }

        textarea {
            width: 300px;
            margin: 0 auto;
            height: 200px;
            display: block;
            margin-top: 20px;
        }

        button {
            background: #444;
            margin-top: 20px;
            color: white;
            display: block;
            margin: 20px auto;
        }

        input[type=radio] {
            margin: 20px 10px;
        }

        select {
            display: block;
            width: 200px;
            display: none;
            margin: 10px auto;
        }
    </style>
</head>

<body>

    <h1>Notification Center</h1>
    <form method="post" action="http://localhost:8000/notify">
        <input class="border" type="text" name="title" placeholder="notiification title">
        <textarea class="border" name="message" placeholder="message"></textarea>
        <input type="radio" name="type" value="all">Send to all
        <input type="radio" name="type" value="topic">Send to topic subscribers only
        <select class="border" name="topic">
            <option value="topic1">Topic 1</option>
            <option value="topic2">Topic 2</option>
            <option value="topic3">Topic 3</option>
        </select>
        <button class="border">Send Notification</button>
    </form>

    <script>
        var all = document.getElementsByName('type')[0]
        var topic = document.getElementsByName('type')[1]
        var select = document.getElementsByTagName('select')[0]

        console.log(all, topic, select)
        topic.onclick = function () {
            select.style.display = 'block'
            all.checked = false
        }

        all.onclick = function () {
            select.style.display = 'none'
            topic.checked = false
        }
    </script>
</body>

</html>
	'use strict'

	const app = require('express')(),
	request = require('request'),
	mongo = require('mongodb'),
	bodyParser = require('body-parser')

	app.use(bodyParser.json())
	app.use(bodyParser.urlencoded({
	extended: false
	}))

	const MongoClient = mongo.MongoClient

	const url = 'mongodb://localhost:27017/myDatabase'
	app.get('/notifications', (req, res) => {
	res.sendFile(__dirname + '/notifcenter.html')
	})

	app.post('/store', (req, res) => {

	MongoClient.connect(url, (err, db) => {
	if (err) throw err
	else {
	db.collection('tokens').insertOne(req.body, (err, body) => {
	if (err) throw err
	res.sendStatus(200)
	})
	}
	db.close()
	})
	})
	const sendNotifications = (data) => {

	const dataString = JSON.stringify(data)

	const headers = {
	'Authorization': 'key=<your firebase legacy server key>',
	'Content-Type': 'application/json',
	'Content-Length': dataString.length
	}

	const options = {
	uri: 'https://fcm.googleapis.com/fcm/send',
	method: 'POST',
	headers: headers,
	json: data
	}

	request(options, function (err, res, body) {
	if (err) throw err
	else console.log(body)
	})
	}
	const sendToTopics = (msg, title, topic, response) => {

	const data = {
	"data": {
	"body": msg,
	"title": title
	}
	}

	data['to'] = '/topics/' + topic

	sendNotifications(data)

	response.sendStatus(200)
	}
	const sendToAll = (msg, title, regIdArray, response) => {

	const data = {
	"data": {
	"body": msg,
	"title": title
	}
	}

	const folds = regIdArray.length % 1000

	for (let i = 0; i < folds; i++) {
	let start = i * 1000,
	end = (i + 1) * 1000

	data['registration_ids'] = regIdArray.slice(start, end).map((item) => {
	return item['token']
	})

	sendNotifications(data)
	}

	response.sendStatus(200)
	}
	app.post('/notify', (req, res) => {

	let msg = req.body.message,
	title = req.body.title,
	type = req.body.type,
	topic = req.body.topic

	if (type === 'topic') {
	sendToTopics(msg, title, topic, res)
	} else {
	MongoClient.connect(url, function (err, db) {
	if (err) throw err
	else {
	db.collection('tokens').find({}).toArray((err, docs) => {
	sendToAll(msg, title, docs, res)
	})
	}
	db.close()
	})
	}
	})

	app.listen(8000)
	<!DOCTYPE html>
	<html>

	<head>
	<title>Notification Center</title>
	<style>
	body {
	text-align: center;
	}

	h1 {
	font-size: 40px;
	font-family: Verdana, Geneva, Tahoma, sans-serif;
	color: #444;
	}

	input[type=text] {
	width: 300px;
	margin: 0 auto;
	display: block;
	}

	.border {
	padding: 15px;
	border-color: #7a7a7a;
	border-style: solid;
	font-family: Verdana, Geneva, Tahoma, sans-serif;
	border-width: 2px;
	border-radius: 3px;
	}

	textarea {
	width: 300px;
	margin: 0 auto;
	height: 200px;
	display: block;
	margin-top: 20px;
	}

	button {
	background: #444;
	margin-top: 20px;
	color: white;
	display: block;
	margin: 20px auto;
	}

	input[type=radio] {
	margin: 20px 10px;
	}

	select {
	display: block;
	width: 200px;
	display: none;
	margin: 10px auto;
	}
	</style>
	</head>

	<body>

	<h1>Notification Center</h1>
	<form method="post" action="http://localhost:8000/notify">
	<input class="border" type="text" name="title" placeholder="notiification title">
	<textarea class="border" name="message" placeholder="message"></textarea>
	<input type="radio" name="type" value="all">Send to all
	<input type="radio" name="type" value="topic">Send to topic subscribers only
	<select class="border" name="topic">
	<option value="topic1">Topic 1</option>
	<option value="topic2">Topic 2</option>
	<option value="topic3">Topic 3</option>
	</select>
	<button class="border">Send Notification</button>
	</form>

	<script>
	var all = document.getElementsByName('type')[0]
	var topic = document.getElementsByName('type')[1]
	var select = document.getElementsByTagName('select')[0]

	console.log(all, topic, select)
	topic.onclick = function () {
	select.style.display = 'block'
	all.checked = false
	}

	all.onclick = function () {
	select.style.display = 'none'
	topic.checked = false
	}
	</script>
	</body>

	</html>