Chat with a chatbot with NodeJS, Express, Socket.io and MQQT

The application will implement the below design where we expose a chat based on socket.io, which will forward the request to a MQTT broker queue and answer the user’s query using our bot.

The project is based on the following repositories:

1. financialchat It renders the front end and handle the chat feature.
2. financialmqttbroker It allows the communication between the chat server and the chat bot.
3. financialbot It communicates with the financial chat via the mqttbroker.

Technologies

The project is based on the following technologies:

1. expressJS
2. socket.io
3. mosca
4. mqqt

Standalone

You need to download the respositories a run each one using the following commands. I recommend to run in the following order:

1. financialmqttbroker
2. financialbot
3. financialchat

• Prerequisite

npm install pm2 -g

• Install dependencies

npm install

• Start each project

npm start

Navigate to http://localhost:3000/.

• Stop each project

npm stop

• Restart each project

npm restart

Test Project

• Install dependencies

npm install

• Test each project

npm test

Online

Navigate to http://167.172.216.74:3000/.

Features

• It allows the users to users to log in and talk with other users in a chatroom.
• It allows to have multiple chat rooms.
• It keeps the history of the last 50 messages in the chat room.
• It communicates with the chat bot (only one command is implemented)

Commands

All messages on the chat that starts with / is recognize as a command.

• /stock=COMPANY_CODE

  It returns the stock values of the company code.

Screenshoot