Welcome to QR Chatroom

Live demo:

https://qrchatroom.df.r.appspot.com/

User flow:

1. User loads application on computer -> YES

2. User requests a unique URL QR code -> YES

3. User scans QR code with phone to connect -> YES the two devices via a unique URL

4. User can now submit messages on either the -> YES computer or phone and access the message on both devices

##Considerations:

1. Multiple users should be able to use the -> YES application at the same time

2. The URL should be easy to type or contain -> YES /room/ a shortened version for ease of access without using the QR code

Extra credit

1. Make messages live update, user doesn’t have -> YES (Websocket) to refresh to see new messages
2. Make messages ephemeral, set to self destruct -> NOT YET after a certain period of time
3. Add the ability to send files of arbitrary data -> NOT YET
4. Containerize your application using Docker. -> YES (Docker)
5. Use Golang (make sure to support go modules) or typescript-> YES (Golang with Revel FW)

Technologies

• Golang Revel Web Framework
• Websocket
• Docker
• Google app engine to deploy dockerized application (app.yaml config)
• Google Cloud Storage to store QR code image
• SQLite3 database

Next Steps

1. Apply Dependency Injection (google wire project) set up DB type connection and cloud provider

2. Responsive layout for better displaying on Mobile device

3. Send/ receive media objects

4. Caching to decrease number of DB connection and reduce latency messaging using Redis

5. Handle fault tolerance using Hystryx

6. Fix some existing bugs

Start the web server on local:

1. Set up environment variables: HTTP_ADDR, GOOGLE_PROJECT_ID, GOOGLE_BUCKET, GOOGLE_APPLICATION_CREDENTIALS (no needed on production)

2. revel run -a chatroom

3. Go to http://<YOUR_IP>:8080/ and you'll see the home page