agent usability

[uglyoldbob]

I am trying to figure out how to use a tokio::sync::mpsc::Sender and Receiver within the callbacks on an agent struct.

This works, but does not do anything useful.

blue_agent.display_pin_code = Some(Box::new(|a| {
            async move {
                println!("Need to display pin code {:?}", a);
                a.cancel.await.unwrap();
                Ok(())
            }
            .boxed()
        }));

This does not even compile because the compiler complains that s2 does not live long enough.

        let s2: tokio::sync::mpsc::Sender<super::MessageToBluetoothHost> = s.clone();
        blue_agent.display_passkey = Some(Box::new(|a: DisplayPasskey| {
            let s2 = s2.clone();
            async move {
                let b = async |a: DisplayPasskey| {
                    s2.send(super::MessageToBluetoothHost::DisplayPasskey(a.passkey)).await;
                    println!("Need to display passkey {:?}", a);
                    a.cancel.await.unwrap();
                    s2.send(super::MessageToBluetoothHost::CancelDisplayPasskey).await;
                    Ok(())
                };
                b(a).await
            }}
            .boxed()));