♻️ refactor: clean up client to match the end server style

prototypes/quic_demo/src/bin/quic_demo_client.rs

@@ -24,6 +24,8 @@ async fn main () -> anyhow::Result <()> {
 	
 	let opt = Opt::from_args ();
 	
+	//let conf = opt.into_config ();
+	
 	let server_cert = tokio::fs::read ("ptth_quic_output/quic_server.crt").await?;
 	let relay_addr = opt.relay_addr.unwrap_or_else (|| String::from ("127.0.0.1:30380")).parse ()?;
 	let endpoint = make_client_endpoint ("0.0.0.0:0".parse ()?, &[&server_cert])?;
@@ -89,3 +91,37 @@ async fn main () -> anyhow::Result <()> {
 	
 	Ok (())
 }
+
+/// A filled-out config for constructing a P2 client
+#[derive (Clone)]
+pub struct Config {
+	client_tcp_port: u16,
+	server_tcp_port: u16,
+	client_id: String,
+	server_id: String,
+	relay_addr: SocketAddr,
+	relay_cert: Vec <u8>,
+}
+
+impl Opt {
+	pub async fn into_config (self) -> anyhow::Result <Config> {
+		let client_tcp_port = self.client_tcp_port.unwrap_or (30381);
+		let server_tcp_port = self.server_tcp_port.unwrap_or (30382);
+		let client_id = self.client_id.unwrap_or_else (|| "bogus_client".to_string ());
+		let server_id = self.server_id.unwrap_or_else (|| "bogus_server".to_string ());
+		let relay_addr = self.relay_addr.unwrap_or_else (|| String::from ("127.0.0.1:30380")).parse ()?;
+		
+		// Begin I/O
+		
+		let relay_cert = tokio::fs::read ("ptth_quic_output/quic_server.crt").await?;
+		
+		Ok (Config {
+			client_tcp_port,
+			server_tcp_port,
+			client_id, 
+			server_id,
+			relay_addr,
+			relay_cert,
+		})
+	}
+}