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|
pub mod server;
use iced::futures;
use iced::stream;
use iced::widget::text;
use futures::channel::mpsc;
use futures::sink::SinkExt;
use futures::stream::{Stream, StreamExt};
use async_tungstenite::tungstenite;
use std::fmt;
pub fn connect() -> impl Stream<Item = Event> {
stream::channel(100, |mut output| async move {
let mut state = State::Disconnected;
loop {
match &mut state {
State::Disconnected => {
const ECHO_SERVER: &str = "ws://127.0.0.1:3030";
match async_tungstenite::tokio::connect_async(ECHO_SERVER)
.await
{
Ok((websocket, _)) => {
let (sender, receiver) = mpsc::channel(100);
let _ = output
.send(Event::Connected(Connection(sender)))
.await;
state = State::Connected(websocket, receiver);
}
Err(_) => {
tokio::time::sleep(
tokio::time::Duration::from_secs(1),
)
.await;
let _ = output.send(Event::Disconnected).await;
}
}
}
State::Connected(websocket, input) => {
let mut fused_websocket = websocket.by_ref().fuse();
futures::select! {
received = fused_websocket.select_next_some() => {
match received {
Ok(tungstenite::Message::Text(message)) => {
let _ = output.send(Event::MessageReceived(Message::User(message))).await;
}
Err(_) => {
let _ = output.send(Event::Disconnected).await;
state = State::Disconnected;
}
Ok(_) => continue,
}
}
message = input.select_next_some() => {
let result = websocket.send(tungstenite::Message::Text(message.to_string())).await;
if result.is_err() {
let _ = output.send(Event::Disconnected).await;
state = State::Disconnected;
}
}
}
}
}
}
})
}
#[derive(Debug)]
#[allow(clippy::large_enum_variant)]
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) {
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
}
pub fn as_str(&self) -> &str {
match self {
Message::Connected => "Connected successfully!",
Message::Disconnected => "Connection lost... Retrying...",
Message::User(message) => message.as_str(),
}
}
}
impl fmt::Display for Message {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str(self.as_str())
}
}
impl<'a> text::IntoFragment<'a> for &'a Message {
fn into_fragment(self) -> text::Fragment<'a> {
text::Fragment::Borrowed(self.as_str())
}
}
|
