[Bug 33410] Do on-disk avatar cache in CM

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=33410

--- Comment #7 from Simon McVittie <simon.mcvittie at collabora.co.uk> 2012-05-14 04:56:37 PDT ---
(In reply to comment #6)
> Eliminating avatar tokens might break MC's ability to set avatars nicely.

It doesn't, if the CM is required to provide a boolean indicator of whether
avatars persist, and MC stores a boolean "avatar-changed-locally" in its
Account data. Algorithm:

* when local user sets avatar, store it, store avatar-changed-locally = TRUE,
  and (if online) call SetAvatar on the Connection
* when connecting, if avatar-changed-locally || !avatars-persist, upload the
  avatar to the CM with SetAvatar
* when SetAvatar succeeds or fails (for either of those reasons), store
  avatar-changed-locally = FALSE
* when connecting, if !avatar-changed-locally && avatars-persist, download our
  own avatar from the CM. Store it, and store avatar-changed-locally = FALSE.
* when the CM signals that our own avatar has changed, also download it,
  store it, and store avatar-changed-locally = FALSE.

I think that works?

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