use std::io::Write;
use std::net::TcpStream;
use std::sync::{Arc, RwLock};

use anyhow::Result;

use crate::bank::Bank;
use crate::commands::Command;
use crate::protocol;

pub struct Pong;

impl Command for Pong {
    fn execute(&self, _: Arc<RwLock<Bank>>, _: &[u8], mut stream: &TcpStream) -> Result<usize> {
        info!("sending 'pong'");
        let written = stream.write(&[protocol::PONG])?;
        Ok(written)
    }
}