Track progress of Assignment

[shaunanoordin]

Features

• When a logged-in user has an active Assignment, the number of classifications she/he has made, and the number required by the Assignment (if any), are displayed.
• When a logged-in user with an active Assignment makes a Classification, the Assignment store is updated to account for the progress.
• If there is no active Assignment (i.e. default workflow) there will be no progress counter.

Features TODO:

• Currently, I am unable to figure out what's the number for "my classifications" for each Assignment when I start the app. (i.e. I don't know how to ask the EduAPI how many Classifications I've already done. )
  • This is due to some confusion with the JSON data, and needs discussion.
  • For the moment, I've made the number for "my classifications" to default to an obviously incorrect 999999 at app start.
  • You can still see the numbers increase correctly as you make Classifications, though.

Features to Discuss:

• In reference to Message to students when they've finished an assignment #237 - How should we inform users that they've already completed the required number of Classifications for their Assignment? An alert() box would be too obnoxious.

For reference, the code to change would be in app/stores/assignments-store.coffee, function onIncrementClassificationProgress(), e.g.:

onIncrementClassificationProgress: () ->
  newState = _.assign {}, @data
  if newState.activeAssignment
    newState.activeAssignment.myClassificationCount++

    targetCount = parseInt(newState.activeAssignment.classificationTarget)
    if !isNaN(targetCount) && targetCount <= newState.activeAssignment.myClassificationCount
      alert('Good job! You've finished your assignment, maybe do something else now?')

Supercedes #241, fixes #240

@simoneduca , let's talk about this tomorrow.