Basket

Watch your "basket" of stocks in real-time with data from Alpaca.

Basket is intended as a template; it provides a working example of a Phoenix Framework web server utilizing the following tools and patterns:

• Continuous Integration
• Phoenix Channels
• Phoenix LiveView
• Phoenix Presence
• Pow
• Search Autocomplete (in LiveView)
• WebSockex

Basket also serves as a reference for testing patterns:

• ExMachina
• Mox
• Test Server

Many thanks to the authors of these excellent libraries!

Setup

Install

• Ensure Postgres is running. If using Docker, docker start postgres usually works well.
• Run mix setup to install and set up dependencies
• Start the development server with make dev
• Now you can visit localhost:4000 from your browser.

Create a Dev User

• Unauthenticated users will be redirected to the registration page as per Pow standards. Sign up and verify your email (for a quick fix, populate the email_verified_at column in the User table)
• Log in and watch your basket!

Architecture

Basket uses HTTP and WebSocket connections to ingress stock data. The real-time updates are received over WebSocket and distributed through Phoenix Channels, one per stock ticker. Phoenix Presence is utilized to track ticker subscription lifecycles for all users in aggregate against the WebSocket client, sharing one client connection efficiently.