XEP-0184: Message Delivery Receipts, *requires* the id attribute.
Generally this is not the case.
For this reason the id was only present in the DeliveryReceipt struct
since it was only used for XEP-0184.
For https://github.com/profanity-im/profanity/issues/660 XEP-0313 MAM
and https://github.com/profanity-im/profanity/issues/805 XEP-0308 Last Message Correction
we will also need the id.
So in preparation for further work let's move the id to the general
ProfBuffEntry.
We will need to adapt code so that we actually always write the ID if we
receive one.
For OMEMO we had a list with our sent messages.
It was used so that we don't decrypt our own messages in MUCs that come
in via reflection.
Recently for https://github.com/profanity-im/profanity/pull/1209 we
started to use origin-id and use an algorithm so we can detect our own
sent messages via checking origin-id.
Profanity uses the same id for the message ID and origin-id.
With 06f300a42c we added the
message_is_sent_by_us() function.
We implemented XEP-0359 this way to fix
https://github.com/profanity-im/profanity/issues/1201 so that we don't
log our own messages in MUCs twice.
We can now check whether the message was sent by us using this function
and can get rid of the list.
Probably we could also put many parts of the sv_ev_room_message()
function inside (else) part of `if (!(g_strcmp0(mynick,
message->jid->resourcepart) == 0 && message_is_sent_by_us(message))) {`.
Have to look more closely whether any of this needs to be run in case
the message actually comes from us.
Probably missing copy of body to plain in carbon and privmessage.
Only covers the incoming message path because goal is OMEMO decryption
of untrusted message.
Cover some of the log functions but not all.
Reflected messages can't be filtered by nick only otherwise you might
ignore messages comming from you on another devices.
Consequently we maintain a list of sent messages id in mucwin.
To be sure the id will be correctly reflected we use the origin-id
stanza.
