[Ask Difference Between {del} & {leave}]

[riandyrn]

Hello, Gene

I have question regarding {del what=topic} & {leave unsub=true}. Are these both functions basically done something equivalent?

I noticed that these both functions basically deleting user subscription. Maybe the only difference is when we use {leave} we must already subscribed to the topic while {del} is not. So is my understanding correct?

Thanks

[or-else]

Hi Riandy,

• {del what=topic} will actually delete the topic for everybody if it's issued by the topic owner. Only the owner can delete the topic.
• If {del what=topic} issued by a non-owner, it's equivalent to {leave unsub=true}
• And yes, {del what=topic} can be issued without subscribing first while {leave unsub=true} requires subscribing.

[riandyrn]

Hoo…, ok (y)

So suppose we have p2p connection between user A & user B. Suppose user A delete its subscription by either using {del what=topic} or {leave unsub=true}. What supposed to happen in case of user B sending message to user A? Does user A still supposed to receive {pres} packet from user B or not?

I found that sometimes in such case Tinode will still sent {pres} packet to user A, but sometimes it doesn’t. So I would like to confirm which behavior is true in this case.

[or-else]

Once the subscription is deleted, neither messages no pres should go through. I know pres sometimes goes through and it's a bug.

[or-else]

I fixed the p2p issue with unnecessary {pres} being sent or needed not sent : https://github.com/tinode/chat/commit/543a530740c65bb85e8a2bb60c415446a18d5783

I think there is still an issue with presence being sent or not sent in p2p topics when the P permission is changed. I think it's rare enough. I'll fix it later.

[riandyrn]

Ok, thanks a lot, Gene. It's clear now (y)