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chat.io

(★ 1,450)

A Real Time Chat Application built using Node.js, Express, Mongoose, Socket.io, Passport, & Redis.

File Explorer

Download Latest Version (.zip)

- - index.js
- - config.json
  - index.js
- - index.js
- - index.js
- - room.js
  - user.js
- - index.js
- - index.js
- - index.js
- - 404.htm
  - chatroom.ejs
  - login.ejs
  - rooms.ejs
- - style.css
- - chat.io.gif
  - chat.io.PNG
  - facebookLoginBtn.png
  - twitterLoginBtn.png
  - user.jpg
  - user.png
- - main.js
.gitignore
app.json
LICENSE
package.json
Procfile
README.md
server.js

# Installation Guide

1. Get the code

git clone https://github.com/OmarElgabry/chat.io

Downloads the entire project code from GitHub to your computer.

cd chat.io

Moves into the project folder you just downloaded.

2. Node.js

Easy Recommended

Prerequisites

Git Needed to download the project code from GitHub.
Node.js Node.js must be installed to use npm. The LTS version is recommended.

$ npm install

Downloads and installs the libraries listed in package.json.

$ npm start

Starts the development/run server.

✅ After running the command, open the address shown in the terminal (usually something like http://localhost:3000) in your browser.

Pulled directly from this repo's README.

// repository documentation

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![Screenshot](https://raw.githubusercontent.com/OmarElGabry/chat.io/master/public/img/chat.io.gif)

# chat.io
[![Dependency Status](https://www.versioneye.com/user/projects/57d746d1df40d0004a4a9e21/badge.svg?style=flat-square)](https://www.versioneye.com/user/projects/57d746d1df40d0004a4a9e21)
[![Scrutinizer Code Quality](https://scrutinizer-ci.com/g/OmarElGabry/chat.io/badges/quality-score.png?b=master)](https://scrutinizer-ci.com/g/OmarElGabry/chat.io/?branch=master)
[![Code Climate](https://codeclimate.com/github/OmarElGabry/chat.io/badges/gpa.svg)](https://codeclimate.com/github/OmarElGabry/chat.io)
[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2FOmarElGabry%2Fchat.io.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2FOmarElGabry%2Fchat.io?ref=badge_shield)

A Real Time Chat Application built using Node.js, Express, Mongoose, Socket.io, Passport, & Redis.

## Index
+ [Demo](#demo)
+ [Features](#features)
+ [Installation](#installation)
+ [How It Works](#how-it-works)
+ [Support](#support)
+ [Contribute](#contribute)
+ [License](#license)

## Demo<a name="demo"></a>
Check [Demo](http://chatio.herokuapp.com/)

## Features<a name="features"></a>
+ Uses Express as the application Framework.
+ Manages Sessions using [express-session](https://github.com/expressjs/session) package.
+ Authenticates via username and password using [Passport](https://github.com/jaredhanson/passport).
+ Passwords are hashed using [bcrypt-nodejs](https://github.com/shaneGirish/bcrypt-nodejs) package.
+ Social Authentication via Facebook and Twitter using [Passport](https://github.com/jaredhanson/passport).
+ Real-time communication between a client and a server using [Socket.io](https://github.com/socketio/socket.io).
+ Uses [MongoDB](https://github.com/mongodb/mongo), [Mongoose](https://github.com/Automattic/mongoose) and [MongoLab(mLab)](https://mlab.com/) for storing and querying data.
+ Stores session in a [MongoDB](https://github.com/mongodb/mongo) using [connect-mongo](https://github.com/kcbanner/connect-mongo); a MongoDB-based session store.
+ Uses [Redis](https://github.com/antirez/redis) as an Adapter for [Socket.io](https://github.com/socketio/socket.io).
+ Logging Errors and Exceptions using [Winston](https://github.com/winstonjs/winston).

## Installation<a name="installation"></a>
### Running Locally
Make sure you have [Node.js](https://nodejs.org/) and [npm](https://www.npmjs.com/) installed.

1. Clone or Download the repository

```
	$ git clone https://github.com/OmarElGabry/chat.io.git
	$ cd chat.io
	```
2. Install Dependencies

```
	$ npm install
	```
2. Edit configuration file in _app/config/config.json_ with your credentials(see [Setup Configurations](#configurations)).
3. Download and Install [Redis](http://redis.io/download).
4. Running Redis Server(as Admin)

```
	$ redis-server
	``` 
5. Start the application

```
	$ npm start
	```
Your app should now be running on [localhost:3000](http://localhost:3000/).

### Deploying to Heroku
Make sure you have the [Heroku Toolbelt](https://toolbelt.heroku.com/) installed.

1. Create a new Heroku application, and push your chat application to a Git remote repository

```
	$ heroku create
	$ git push heroku master
	```
	
	or
	
	[![Deploy to Heroku](https://www.herokucdn.com/deploy/button.png)](https://heroku.com/deploy)

2. Now, you need to set up configuration variables on Heroku. 
	1. Go to Settings -> Reveal Config Vars.
	2. Add configuration variables. All needed variables are inside _app/config/index.js_. 
	Typically, these are the configuration variables you need to assign: 
	```{ dbURI, sessionSecret, facebookClientID, facebookClientSecret, twitterConsumerKey, twitterConsumerSecret }```(see [Setup Configurations](#configurations)).

3. One last step is to add [Redis](http://redis.io/) as an Add-on on Heroku.
	1. Go to Resources -> Add-ons
	2. Select Heroku Redis
	> You need to setup a billing account even if the add-on is free.
4. Open your chat application in the browser

```
	$ heroku open
	```

## How It Works<a name="how-it-works"></a>
### Setup Configurations<a name="configurations"></a>
The configurations on production will be assigned from Environment Variables on Heroku, while the development configurations reside inside _app/config/config.json_ file.

#### MongoDB & MongoLab
You need to create a database on MongoLab, then create a database user, get the `MongoDB URI`, and assign it to `dbURI`.

#### Facebook & Twitter
You need to register a new application on both Facebook and Twitter to get your tokens by which users can grant access to your application, and login using their social accounts.

##### Registering the app on Facebook
1. Go to [Facebook Developers](https://developers.facebook.com/)
2. Add new app, and fill the required information.
3. Get your `App ID`, `App Secret`.
4. Go to Add Product -> Facebook Login -> Valid OAuth redirect URIs
5. Add Valid Callback URIs
6. Go to App Review -> Make your application public.

Now, you can assign the `App ID` to `facebookClientID`, and `App Secret` to `facebookClientSecret`.
##### Registering the app on Twitter
1. Go to [Twitter Apps](https://apps.twitter.com/)
2. Create new app, and fill the required information.
3. Add Website & Callback URL
4. Get your `Consumer Key`, `Consumer Secret`.

Now, you can assign the `Consumer Key` to `twitterConsumerKey`, and `Consumer Secret` to `twitterConsumerSecret`.

##### The Callback URL
- It can point back to your localhost; _[http://localhost:3000/auth/facebook/callback](http://localhost:3000/auth/facebook/callback)_

- When deploy to Heroku, you will have something look like this; _[http://my-chat-app.herokuapp.com/auth/facebook/callback](http://my-chat-app.herokuapp.com/auth/facebook/callback)_

#### Session
The session needs a random string to make sure the session id in the browser is random. That random string is used to encrypt the session id in the browser, _Why?_ To prevent session id guessing.

### Database<a name="database"></a>
Mongoose is used to interact with a MongoDB that's hosted by MongoLab.

#### Schemas
There are two schemas; users and rooms.

Each user has a username, passowrd, social Id, and picture. If the user is logged via username and password, then social Id has to be null, and the if logged in via a social account, then the password will be null.

Each room has a title, and array of connections. Each item in the connections array represents a user connected through a unique socket; object composed of _{userId + socketId}_. Both of them together are unique.

### Models<a name="models"></a>
Each model wraps Mongoose Model object, overrides and provides some methods. There are two models; User and Room.

### Session<a name="session"></a>
Session in Express applications are best managed using [express-session](https://github.com/expressjs/session) package. Session data are stored locally on your computer, while it's stored in the database on the production environment. Session data will be deleted upon logging out.

### User Authentication<a name="auth"></a>
User can login using either a username and password, or login via a social account. User authentication is done using [Passport](https://github.com/jaredhanson/passport). Passport has extensive, and step-by-step [documentation](http://passportjs.org/docs/) on how to implement each way of authentication.

### Sockets<a name="sockets"></a>
Having an active connection opened between the client and the server so client can send and receive data. This allows real-time communication using TCP sockets. This is made possible by [Socket.io](https://github.com/socketio/socket.io).

The client starts by connecting to the server through a socket(maybe also assigned to a specific namespace). Once connections is successful, client and server can emit and listen to events.

There are two namespaces used; `/rooms` and `/chatroom`.

### Logger<a name="logger"></a>
And It doesn't go without saying, you need to monitor your application. [Winston](https://github.com/winstonjs/winston) can log and catch Uncaught Exceptions. All logs are displayed in the console, and saved in _debug.log_ file.

On Heroku, you can monitor the logs by clicking on _More -> View Logs_ on the top left of your application dashboard.

## Support <a name="support"></a>
I've written this script in my free time during my studies. If you find it useful, please support the project by spreading the word.

## Contribute <a name="contribute"></a>

Contribute by creating new issues, sending pull requests on Github or you can send an email at: omar.elgabry.93@gmail.com

## License <a name="license"></a>
Built under [MIT](http://www.opensource.org/licenses/mit-license.php) license.

[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2FOmarElGabry%2Fchat.io.svg?type=large)](https://app.fossa.io/projects/git%2Bgithub.com%2FOmarElGabry%2Fchat.io?ref=badge_large)