isthemunibusy-go

This was originally a project to predict how crowded the muni trains would be, but given the current circumstances with COVID-19, I have decided to pivot this project to be a feature test admin tool.

Features

• Create a new feature test (DONE)
  • Name
  • Start date
  • End date
  • Variants[]
    • Name
    • Percentage
    • Is control?
• Delete an existing feature test (DONE)
  • Cascade to feature test variants
  • Cascade to users with those test variants
• Update an existing feature test (DONE)
  • Name
  • End date
• Create a feature test variant (DONE)
  • Name
  • Percentage
  • Is control?
• Update a feature test variant (DONE)
  • Name
  • Percentage
  • Is control?
• Delete a feature test variant (DONE)
  • Cascade to users with that test variant
• List user test variants (DONE)
• List feature tests (DONE)
• List feature test variants (DONE)
• Assign users to a test variant (create user test variant) (DONE)
• Change test variants for a user (update user test variant) (DONE)
• Delete user test variant (DONE)
• Only allow changes to feature test variant id for user feature test variant update (DONE)
• Better error messages for constraint violations (DONE)

DB:

• check constraint on test variant percentage sum <= 100 (DONE)
• check constraint on test variants for a test only having one row is_control = true
  • insert (DONE)
  • update (leaving alone for now)

How to run locally

Navigate to the go repo directory (go\src\github.com\hwangm\isthemunibusy-go) In a terminal window, run go run .\main.go.

To restart, Ctrl-C and re-run.

Notes

• graphql DateTime field expects an input like "2020-05-05T00:00:00Z". It's pretty picky about the time formatting.

• 2/15/2021: added a websocket handler at "ws://localhost:8080/websocket" to test notification service. React app currently configured to auto-connect to this WS endpoint. Incoming messages will be printed in stdout, then sleep for 5 seconds and send a message to the client.