Web and Desktop don't load unread chats when computer awakens from sleep

[mallenexpensify]

Problem
When a computer is Sleeping (I closed my laptop) and new chats are sent, they don't show as in LHN once the computer is awakened (desktop chat remained open during sleep).
I've seen this a handful of times but wasn't sure of the exact issue. I just tested with Joe and Jeremy and they didn't show up, Mitch sent me a message soon after and it does show as unread (still nothing from Joe or Jez). When I refresh Desktop all unread messages show.
I was able to replicate this issue using the same steps above but only on web.

I also tested by going into Screensaver mode (via hot corner) instead of Sleep and the chat's loaded correctly on Desktop

Solution
See how we can fix it, my guess is it's something to do with Pusher

[mallenexpensify]

I have a feeling the two issues below are related to this too
DM Chat message sent by Jeremy to me didn't show up in web chat #388
Messages being sent via email but NOT showing up in chat #490

[marcaaron]

Trying to repro now.

[mallenexpensify]

Exact steps would be...

• open/update Chat to make sure you're on the latest :)
• leave Chat open then put your computer into sleep state
• via Slack on phone, ping someone (me.. me....) to send you a message via Chat and confirm it's sent via Slack.
• Awaken computer, Chat should already be open and the new, unread chat should not show

[marcaaron]

Ok I think I figured this out.

TL;DR we are listening to various state_change events which can all be seen here:
https://pusher.com/docs/channels/using_channels/connection#available-states

However, unless if the state_change event is something other than connecting or unavailable we set the offline status to "online". That's bad because a few of these state changes are very indicative of being "offline"... such as failed and the ever popular disconnected

https://github.com/Expensify/ReactNativeChat/blob/12df2846f0954b0456b09a831a0bcf21fe8ff557/src/lib/API.js#L311-L332

[marcaaron]

Fix incoming.

[Jag96]

Fixed by #505