Let teacher request ai eval

[davidsbailey]

Finishes https://codedotorg.atlassian.net/browse/AITT-101. This PR does the following:

• adds a new /rubrics/1/ai_evaluation_status_for_user endpoint, which returns boolean status variables for whether the student has attempted the current level, and whether that attempt has been evaluated (lastAttemptEvaluated).
  • attempted is computed by looking for presence of a UserLevel
  • lastAttemptEvaluated is computed by comparing user_level.updated_at to the update_at timestamp on the most recent LearningGoalAIEvaluation
• updates /rubrics/1/run_ai_evaluation_for_user to reject the request unless the level has been attempted but not yet evaluated
• updates the UI to display a message according to this status, following the state transition diagram below
• adds unit tests for ruby and JS

Kudos to Bethany for adding the UI messages and writing the JS tests!

state transition diagram

Here is how the client state behaves in response to the AI evaluation status and user clicks (apologies, I left out EVALUATION PENDING which happens after the run ai button is clicked):

demo

this screen capture shows the following states: INITIAL_LOAD (very brief) --> NOT_ATTEMPTED --> student attempts --> teacher refreshes --> INITIAL_LOAD --> READY --> teacher clicks run --> EVALUATION_PENDING --> SUCCESS

run-ai-button-720p.mov

Testing story

• new js tests
• new and updated ruby tests

[davidsbailey]

These tests look great Bethany, thank you so much for pitching in! LGTM on changes to this file

[davidsbailey]

LGTM on Bethany's changes to this file

[wilkie]

Looks good and I'm definitely appreciative of these good tests!

[bethanyaconnor]

Thanks for thinking through this so deeply!