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ARCHITECTURE.md

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Architecture

Technical Stack

Database:

  • PostgreSQL
  • Redis (not implemented)

Backend:

  • Koa
  • Pug

Frontend:

  • React
  • Redux

Testing:

  • Unit - Jest
  • Acceptance - Selenium & Puppeteer (via @dollarshaveclub/e2e)
  • Monitors - Puppeteer (via @dollarshaveclub/monitor)

Files & Folders

  • isomorphic/ - stores all code used by either server/ or client/
  • server/ - stores all server related code
    • utils/ - utilities that has no business logic
    • lib/ - logic and helpers that do not depend on a database, but do affect business logic
    • psql/ - setting up and migrating the database
    • model/ - database modeling and business logic
    • app/ - bootstrap the Koa app
    • controllers/ - routing logic
    • api/ - API routes
    • routes/ - non-API routes
  • client/ - all client-side app code
    • ui/ - all visual UI components
    • components/ - all non-connected components
    • stories/ - stories for all non-connected components for Storybook
    • api-sdk/ - SDK for the API
    • store/ - redux store
      • <domain> - the redux store is stored by domain
        • actions
        • reducer
        • index.js - the action dispatcher for this domain. These are the only functions connected components should be calling.
    • routes/ - connected components that are served by a route
  • public/ - all static assets served publicly
  • tests/ - tests that span both the server and the client
    • monitors/ - API and Puppeteer smoke tests
    • automation/ - Selenium tests

Modularizing

Currently, this app is built as a monorepo. For small projects, this is sufficient and makes adding features easy. However, this becomes difficult to scale. Here's a plan for modularization, which depends on your app:

  • utils / lib - a module for all utils and/or server/lib
  • server/model/ - a module for all app business logic
  • storybook - a module/app for the storybook
    • .storybook
    • client/ui/
    • client/compoonents/
    • client/stories/
  • api-sdk/ - an isomorphic module for working with your API
  • client/store - a module for your redux store
  • tests/monitors/ - a module for your monitors and to run them
  • tests/automation/ - a module for your automation tests

Ownership

Ownership of parts of the app and modularized can be split by discipline:

  • Server - Backend
  • Storybook - Frontend UI
  • Redux store - Frontend App
  • API SDK - Backend and Frontend App
  • Tests - QA as well as Frontend and Backend