https://github.com/nehalist/realtime-notifications
Realtime Notifications (and currently online list) with SailsJS
https://github.com/nehalist/realtime-notifications
Last synced: 3 days ago
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Realtime Notifications (and currently online list) with SailsJS
- Host: GitHub
- URL: https://github.com/nehalist/realtime-notifications
- Owner: nehalist
- Created: 2015-09-11T12:50:55.000Z (almost 10 years ago)
- Default Branch: master
- Last Pushed: 2015-09-11T12:53:04.000Z (almost 10 years ago)
- Last Synced: 2025-02-13T07:34:06.434Z (4 months ago)
- Language: JavaScript
- Size: 250 KB
- Stars: 4
- Watchers: 2
- Forks: 1
- Open Issues: 0
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Metadata Files:
- Readme: README.md
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README
# Realtime Notifications
My little playground to play around with realtime events and things like that. This project covers:
- User authentication (via Passport)
- Send notification messages (in realtime) from one user to another
- Realtime "currently online" list
It's entirely written in NodeJS using the SailsJS Framework. For additional credits see below.
### Installation
- Clone the repo
- Run `npm install`
- Run `sails lift`
- Go to `http://localhost:1337`
- Win
### How to use it
- Click on the `Register` button
- Register a bunch of users
- Log into each of the users simultaneously (by using Chrome Incognito mode, other browsers, devices, whatever)
- Send notifications / messages to users
- Win again
### How it works
#### Notifications
1. After logging in the client is subscribed to a room for _his_ (`user_notifications_{id}`) notifications (see `api/controllers/NotificationsController@subscribe`)
2. Every time a notification is created a message is broadcast to the receivers notifications room (see `api/models/Notification.js@afterCreate`)
3. Client reacts to notifications (see `assets/js/app.js@Line~61`)
#### Users online list
The `Connections` service is responsible for managing connections (basically just stores and/or removes user IDs from the memory).
1. After logging in every client is subscribed to a room called `users_online` (see `api/controller/ConnectionController@subscribe`). The request returns a list of all connected users to show it on client (see `aseets/js/app.js@Line~9`)
2. Whenever a user logs in a message is broadcast to the `users_online` room (see `api/controller/ConnectionController@subscribe`)
3. Whenever a user disconnects (or logs out) it gets removed by the `Connections` service. In case the user doesn't return within three second it can be considered as "offline" and a message is broadcast (see `config/sockets@afterDisconnect`). The delay is required due to refreshing a page is technically a disconnect.
### Credits
- [SailsJS](http://sailsjs.org/)
- [jQuery](https://jquery.com/)
- [Bootstrap](http://getbootstrap.com/)
- [PassportJS](http://passportjs.org/)
written by [nehalist.io](http://nehalist.io)