use anyhow::{Context, Error, Result};
use super::*;
use futures::prelude::*;
use serde_json::json;
use stream::iter;

pub async fn greet<T>(sink: &mut T) -> Result<()>
where T: Sink<ServerMessage, Error = Error> + Unpin
{
    let mut greeting = iter(vec![
        ServerMessage::Meta {
            m: Meta {
                version: "Unstable",
                helo: Some("Dedicated base2020 server".into()),
            },
        },
        ServerMessage::SetState {
            u: 0,
            s: json!({}),
        },
    ])
    .map(Ok);

    sink.send_all(&mut greeting).await.context("Greeting client")
}