Don't set lastMessage, let it update itself as needed, such as when
first rendering a conversation list item, and when its messages are
sent, received, or destroyed.
There are some cases when we want to initialize a group object without
loading its contacts, such as while processing delivery receipts. We
really only need to load the contacts for a group/convo when we are
rendering it, so let the front end handle those cases (which most of
them do already).
TimestampView's getRelativeTimeSpanString called moment() twice while
calculating the timeout. If there was a minute/hour/day wrap between
these 2 calls, the calculated delay was 0 and thus no timer was
scheduled, since if (this.delay) evaluated to false.
Fixes: #857, #460
// FREEBIE
Usually new elements are inserted in a predictable order relative to the
sort order of the models/collection, but it's not garaunteed. This fixes
up message element insertion to handle the general case where elements
can be added in any order and must be displayed in correct order as
determined by the collection's sort function. In the worst case, we'll
have to iterate over the entire list of elements to find the right spot,
but in practice most of the time we can short circuit based on the index
of the model or by looking for the predecessor or successor of the
element in question.
This breaks the css-purity of our mixin but is necessary in order to
apply the initial offset of the hourglass animation dynamically, since
jquery can't manipulate arbitrary css on psuedo elements.
When initialized, or when expiration-related attributes change, expiring
messages will set timers to self-destruct. On self-destruct they trigger
'expired' events so that frontend listeners can clean up any collections
and views referencing them.
At startup, load all messages pending expiration so they can start their
timers even if they haven't been loaded in the frontend yet.
Todo: Remove expired conversation snippets from the left pane.
Test page loads fixtures and renders the inbox view. This may be useful
for smoke testing style changes or generating screenshots with
pseudo-realistic data.
Includes a couple small changes to get rendering working outside the
app.
