Save draft on chat change

[maxphilippov]

• resolves Message draft discarded when switching to different chat quickly #3733

[maxphilippov]

OUTDATED: This is a thing we discussed a long time ago, we had a 1 second debounce for saving draft, so if you're in any way fast at switching between different chats you just lose what you were typing right before switching. We were talking about testing something around 200-300ms, I went for 100.

[maxphilippov]

I did keep the original 1 second delay between autosave

[WofWca]

So do you suggest to save the draft on every key press? Because this is what's happening in this MR, and it doesn't seem intentional.

[maxphilippov]

So do you suggest to save the draft on every key press? Because this is what's happening in this MR, and it doesn't seem intentional.

Oops, my bad, rushed that a bit. Didn't notice we have a setState above. I'll draft it for now. Reverted back to 200ms, removed saveDraft from onChange then. Gonna look for a way to maybe flush via ref to messageInputComposer. I don't agree with throttle, since I don't see the point in saving first character immediately and thus pushing next save further in time. Next save is what's more likely to happen on chat change.

[WofWca]

thus pushing next save further in time

I don't think that's how throttle works. Throttle is never less frequent than debounce.

[maxphilippov]

thus pushing next save further in time

I don't think that's how throttle works. Throttle is never less frequent than debounce.

Oh, my bad again, for some reason I got memorized that debounce is just throttle but without the inital call (so it calls at the end of time interval while throttle in the beginning). Yeah, makes sense then.

[maxphilippov]

As discussed with @nicodh, I've added a simple throttle implementation and made saveDraft use this one instead of debounce.