main.js

// Initialize Firebase
const config = {
	apiKey: "AIzaSyDiiS4nQyeseAANNXDlcQ6_kwWeTN7s5SI",
  authDomain: "sults-f1948.firebaseapp.com",
  databaseURL: "https://sults-f1948.firebaseio.com",
  projectId: "sults-f1948",
  storageBucket: "sults-f1948.appspot.com",
  messagingSenderId: "780489121414"
};
firebase.initializeApp(config);

const messaging = firebase.messaging();
messaging.usePublicVapidKey('BBBVO9Ce6-CdgYqXkWkVP0M_0BiEw4MkY1cKbl6tQxsWtD3k1X900K0YPQ0yIfIVc7w8Xcw4Md2ppbWB0aPWm-Og');

function getNotificationPermission() {
	messaging
		.requestPermission()
		.then(function() {
			return;
		})
		.catch(function(err) {
			console.error('Unable to get permission to notify.', err);
			throw err;
		});
}

function getDeviceToken() {
	messaging
		.getToken()
		.then(function(currentToken) {
			debugger;
			if (currentToken) {
				return currentToken;
			} else {
				// Show permission request.
				throw 'No Instance ID token available. Request permission to generate one.';
			}
		})
		.catch(function(err) {
			console.log('An error occurred while retrieving token. ', err.message);
			throw err.message;
		});
}

function getCookieUserData() {
	return {
		user: getCookie('usuario'),
		rede: getCookie('empresa'),
	};
}

function getCookie(cname) {
	let name = cname + '=';
	let decodedCookie = decodeURIComponent(document.cookie);
	let ca = decodedCookie.split(';');

	for (let valueIndex = 0; valueIndex < ca.length; valueIndex++) {
		let c = ca[valueIndex];
		while (c.charAt(0) == ' ') {
			c = c.substring(1);
		}
		if (c.indexOf(name) == 0) {
			return c.substring(name.length, c.length);
		}
	}

	return '';
}

function sendTokenToServer(userEmail, userRede, deviceToken) {
	debugger;
	const db = firebase.firestore();

	db.collection('users')
		.add({
			user: userEmail,
			deviceToken: deviceToken,
			rede: userRede,
		})
		.then((res) => {
			return;
		})
		.catch((err) => {
			throw err.message;
		});
}

function verifyIfUserExists(userEmail, userRede) {
	
}

async function init() {
	try {
		await messaging.requestPermission();
		const deviceToken = await messaging.getToken();
		const { user, rede } = await getCookieUserData();

		sendTokenToServer(user, rede, deviceToken);
	} catch (err) {
		console.error(err);
	}
}

if ('serviceWorker' in navigator && 'PushManager' in window) {
	init();
} else {
	console.warn('Mensagem PUSH não é suportado');
}