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|
pub mod server;
use iced_futures::futures;
use iced_native::subscription::{self, Subscription};
use futures::channel::mpsc;
use futures::sink::SinkExt;
use futures::stream::StreamExt;
use async_tungstenite::tungstenite;
pub fn connect() -> Subscription<Event> {
struct Connect;
subscription::unfold(
std::any::TypeId::of::<Connect>(),
State::Disconnected,
|state| async move {
match state {
State::Disconnected => {
const ECHO_SERVER: &str = "ws://localhost:3030";
match async_tungstenite::tokio::connect_async(ECHO_SERVER)
.await
{
Ok((websocket, _)) => {
let (sender, receiver) = mpsc::channel(100);
(
Some(Event::Connected(Connection(sender))),
State::Connected(websocket, receiver),
)
}
Err(_) => {
let _ = tokio::time::sleep(
tokio::time::Duration::from_secs(1),
)
.await;
(Some(Event::Disconnected), State::Disconnected)
}
}
}
State::Connected(mut websocket, mut input) => {
let mut fused_websocket = websocket.by_ref().fuse();
futures::select! {
received = fused_websocket.select_next_some() => {
match received {
Ok(tungstenite::Message::Text(message)) => {
(
Some(Event::MessageReceived(Message::User(message))),
State::Connected(websocket, input)
)
}
Ok(_) => {
(None, State::Connected(websocket, input))
}
Err(_) => {
(Some(Event::Disconnected), State::Disconnected)
}
}
}
message = input.select_next_some() => {
let result = websocket.send(tungstenite::Message::Text(String::from(message))).await;
if result.is_ok() {
(None, State::Connected(websocket, input))
} else {
(Some(Event::Disconnected), State::Disconnected)
}
}
}
}
}
},
)
}
#[derive(Debug)]
enum State {
Disconnected,
Connected(
async_tungstenite::WebSocketStream<
async_tungstenite::tokio::ConnectStream,
>,
mpsc::Receiver<Message>,
),
}
#[derive(Debug, Clone)]
pub enum Event {
Connected(Connection),
Disconnected,
MessageReceived(Message),
}
#[derive(Debug, Clone)]
pub struct Connection(mpsc::Sender<Message>);
impl Connection {
pub fn send(&mut self, message: Message) {
let _ = self
.0
.try_send(message)
.expect("Send message to echo server");
}
}
#[derive(Debug, Clone)]
pub enum Message {
Connected,
Disconnected,
User(String),
}
impl Message {
pub fn new(message: &str) -> Option<Self> {
if message.is_empty() {
None
} else {
Some(Self::User(message.to_string()))
}
}
pub fn connected() -> Self {
Message::Connected
}
pub fn disconnected() -> Self {
Message::Disconnected
}
}
impl From<Message> for String {
fn from(message: Message) -> Self {
match message {
Message::Connected => String::from("Connected successfully!"),
Message::Disconnected => {
String::from("Connection lost... Retrying...")
}
Message::User(message) => message,
}
}
}
|
