onBye() method for `OutgoingRequestDelegate` interface

Currently I can see no way to react to the receiver hanging up other than hooking into the SessionState.Terminated stateChange. Along with the existing methods, setting up a method to call on when the Session generated by the request gets a BYE would be a really useful addition to the library.

I saw there is an onBye() in core/ but personally don’t see a way to set that. If a method to do this exists already perhaps it could be documented in the example code?

[john-e-riordan]

Getting the Reason header from the BYE seems like reason enough to add onBye() to session delegate.

If an onBye handler is provided, the handler it will be responsible for accepting the BYE (sending the 200 Ok to the BYE). So minimum handler will look something like…

session.delegate = {
  onBye: (bye) void => {
    bye.accept();
  }
};

Just as reiteration for future readers, onBye is/will not be sufficient to detect Session termination - use the session state for that.

[james-criscuolo]

This has been merged and release with 0.15.11, closing. Thanks again!