Regressions caused by bad refactoring in commit 21feac3bea.
Test cases in tests/CommandInterpreterTest.php were made against the pre-refactoring code, and now check out with the fixed code.
Failures were caused by not changing logic structure when moving from multiple exit points (each if point would return directly with a null or an object) to setting a result variable and then falling through to a common exit point. Without the if statements being restructured, the result variable would just get overridden by the next case.
Workaround for deleted profiles still appearing in cached subscriptions/subscribers lists: if we couldn't fetch them, don't include them in the ArrayWrapper.
ArrayWrapper doesn't deal well with null entries, which aren't meant to happen in how it works. This code has recently changed from dying directly with a PHP fatal error in that case to throwing an exception, which allows tracking down the caller.
It looks like there might be some cases where profiles and their matching subscriptions get deleted, but the subscription entries don't get properly cleared from cache... that still bears further investigation. The regular code path looks ok; calls Subscription::cancel() from code called in Profile::delete(); but if they're batch-deleted instead of one row at a time, that could fail to trigger.
A repeat/retweet is roughly equivalent to an active direct post, so should follow the posting rules, rather than always sending over as we do for fave notifications.
Output from 0.9.6 PuSH feeds seems to have a rump <author> but no
<activity:actor>. It was overwriting valid and useful data set up at
subscribe time.
This fix tries to avoid overwriting data. However, it may prevent
updates that delete data.
Bug: 3028
Should fix issue #3027: twitter user avatars not getting imported.
Due to the change in URI, all twitter users that had been previously seen were getting new profile entries, which tried to save the same avatar. This would fail as Avatar.url has a unique index.
Note: now anything new seen in the last couple days in production will still potentially conflict.
