Track progress while client is offline

[jasonrr]

Things to consider:

• possibly treat it as a phantom user so that you can collect information when user isn't signed in (addresses playhead state not being saved without a user)

Things we want to track:

• play head state
• video progress (started/complete)
• points earned

Eventually:

• problems done
• exercises completed
• badges earned

[jeresig]

To clarify, this is something that we want to tackle in the 1.1 release.

[jeresig]

So I've been digging into this and it appears as if we already tackle most of this. We track play head state offline and we track video progress offline (and we even sync video progress and playhead position when we come back online). We don't attempt to guess at points earned. I think I may have even written the syncing code way back when and just forgot, heh. Maybe there are specific bugs right now with the playhead position tracking or video progress syncing?