How to send push notifications with node and capacitor - node.js

Question

I have Angular application with Capacitor (without Ionic) and I need to send push notifications to the user app from Node.js backend. How would I do that? Any article, source or example would be much appreciable?
Here is capacitor.config.ts file
import { CapacitorConfig } from '#capacitor/cli';
const config: CapacitorConfig = {
appId: 'xxx.xxxxxxx.xxx',
appName: 'ABC',
webDir: 'dist/abc',
bundledWebRuntime: false,
plugins: {
PushNotifications: {
presentationOptions: ["badge", "sound", "alert"],
},
},
};
export default config;
I have seen many artcles etc. on push notifications with Capacitor and Firebase but couldn't find a single source on my requirement.

Answer 1

The best and easiest solution so far is to implement it with firebase. There are primarily two parts to this entire setup
Configure Capacitor and Firebase to be able to receive notifications
For this I suggest you follow this tutorial word by word.
Code the nodejs implementation to send push notifications from the server
For this, follow the firebase official documentation
As a reference, here is how you can handle the nodejs part, this triggers push notifications successfully.
const admin = require("firebase-admin");
admin.initializeApp({
credential: admin.credential.applicationDefault(),
databaseURL: <Your-Firebase-DB-URL>
});
async function sendNotification(tokens, title, body, data = {}) {
message = {
notification: {
title: title,
body: body,
},
data: data
}
options = {
priority: 'high'
}
result = await admin.messaging().sendToDevice(tokens, message, options)
return result;
}
module.exports = { sendNotification };