For a large domain like HS, we were pulling back about 100k of
text with subscriber emails when we opened the Streams page.
This was unnecessary, as the subscribers aren't shown until
you expand the stream, and there's already an AJAX call.
(imported from commit 69b83d769030d87318acefc364ac6ff3a2ec3605)
Warn inside these functions when you get data on streams that you
are not subscribed to:
add_subscriber
remove_subscriber
user_is_subscribed
The back end should be smart enough not to spam us with subscriber
info that we don't care about.
(imported from commit b27644be2abc37c11ddff884ef392ea208bd1bd3)
Though this should not be common, getting a peer subscribed/
unsubscribed notification to a stream we don't yet know about should
not be fatal
(imported from commit ee28b163e0efc9adfad31e1b321e986dfe56271e)
This is feature-flagged to staging only.
There are basically 3 parts to the implementation:
1. In response to typing, fade/unfade the user list.
2. When a compose is aborted, unfade all users.
3. When the presence list is redrawn, fade/unfade the user list again.
(imported from commit cd416de232849a9f69dcacdc8b0fcfc20e3848a2)
This function returns the stream's actual name, if we can get it;
otherwise, it's the identity function.
(imported from commit 7a981adba9632d6c6eba54cb6514a9226d1e83e8)