This is to ensure that when there are a lot of unread messages, the user
is given the chance to see all of them by being scrolled to the oldest
new message.
When a new message comes in, the indicator will be incremented.
When the user sends a message or switches away from the conversation,
the last seen indicator will be removed.
FREEBIE
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).
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.
Use emojijs for replacing unicode with image tags for display. We were
already using it to replace colons with unicode. Additionally it has
a companion data repo that is kept up to date with images from all
the common image sets.
// FREEBIE
Messages that are received in the active conversation while the window
is focused, are automatically marked as read.
The conversation appears as unread for a split second as the incoming message
arrives but it gets marked as read as soon as the message is displayed.
The window title now shows the global number of unread messages as
"Signal (1)". This way the user can see the number of unread messages
in the task bar and when alt-tabbing.
Resolves: #384
We don't need to keep them in memory if we're done viewing them,
plus it avoids having to re-render a large collection when we re-open a
conversation. Now that we only load a sensible number of messages at a
time, caching them between usages is less valuable. Removing them from
the collection should free them for garbage collection.
// FREEBIE
