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// Background network worker for the TUI. The render loop in main.rs is a
// plain synchronous 60fps loop (see run_app) - rather than restructure that
// into async, a dedicated OS thread owns its own tokio runtime and a small
// reqwest client, communicating over plain std::sync::mpsc channels. The
// main loop sends a Job after each keypress that queues one, and polls
// try_recv() once per frame to apply whatever came back.
use crate::config_file::server_url;
use serde::Deserialize;
use std::sync::mpsc;
use typerpunk_core::app::{FriendRow, LeaderboardRow, NetworkAction};
pub enum NetResponse {
LoginOk { username: String, token: Option<String> },
Error(String),
Leaderboard(Vec<LeaderboardRow>),
Friends { list: Vec<FriendRow>, incoming: Vec<FriendRow>, outgoing: Vec<FriendRow> },
}
struct Job {
action: NetworkAction,
token: Option<String>,
}
pub struct NetClient {
tx: mpsc::Sender<Job>,
rx: mpsc::Receiver<NetResponse>,
}
impl NetClient {
pub fn spawn() -> Self {
let (job_tx, job_rx) = mpsc::channel::<Job>();
let (resp_tx, resp_rx) = mpsc::channel::<NetResponse>();
std::thread::spawn(move || {
let rt = tokio::runtime::Builder::new_current_thread()
.enable_all()
.build()
.expect("failed to start TUI network runtime");
let client = reqwest::Client::builder()
.timeout(std::time::Duration::from_secs(10))
.build()
.expect("failed to build http client");
let base = server_url();
while let Ok(job) = job_rx.recv() {
let response = rt.block_on(run_job(&client, &base, job));
if resp_tx.send(response).is_err() {
break; // main loop is gone
}
}
});
Self { tx: job_tx, rx: resp_rx }
}
pub fn send(&self, action: NetworkAction, token: Option<String>) {
let _ = self.tx.send(Job { action, token });
}
pub fn try_recv(&self) -> Option<NetResponse> {
self.rx.try_recv().ok()
}
}
#[derive(Deserialize)]
struct ErrorBody {
error: String,
}
async fn error_message(resp: reqwest::Response) -> String {
let status = resp.status();
match resp.json::<ErrorBody>().await {
Ok(body) => body.error,
Err(_) => format!("request failed ({status})"),
}
}
#[derive(Deserialize)]
struct UserView {
username: String,
}
#[derive(Deserialize)]
struct TokenResponse {
token: String,
user: UserView,
}
async fn run_job(client: &reqwest::Client, base: &str, job: Job) -> NetResponse {
match job.action {
NetworkAction::Login { username, password } => login(client, base, &username, &password).await,
NetworkAction::Register { username, password } => {
let register_url = format!("{base}/api/auth/register");
match client.post(®ister_url).json(&serde_json::json!({ "username": username, "password": password })).send().await {
Ok(resp) if resp.status().is_success() => login(client, base, &username, &password).await,
Ok(resp) => NetResponse::Error(error_message(resp).await),
Err(err) => NetResponse::Error(format!("network error: {err}")),
}
}
NetworkAction::FetchLeaderboard { mode } => {
let url = format!("{base}/api/leaderboard?mode={mode}");
match client.get(&url).send().await {
Ok(resp) if resp.status().is_success() => match resp.json::<Vec<LeaderboardRow>>().await {
Ok(rows) => NetResponse::Leaderboard(rows),
Err(err) => NetResponse::Error(format!("bad response: {err}")),
},
Ok(resp) => NetResponse::Error(error_message(resp).await),
Err(err) => NetResponse::Error(format!("network error: {err}")),
}
}
NetworkAction::FetchFriends => fetch_friends(client, base, job.token.as_deref()).await,
NetworkAction::SendFriendRequest { username } => {
let Some(token) = job.token.as_deref() else { return NetResponse::Error("not signed in".to_string()) };
let url = format!("{base}/api/friends/request");
match client.post(&url).bearer_auth(token).json(&serde_json::json!({ "username": username })).send().await {
Ok(resp) if resp.status().is_success() => fetch_friends(client, base, Some(token)).await,
Ok(resp) => NetResponse::Error(error_message(resp).await),
Err(err) => NetResponse::Error(format!("network error: {err}")),
}
}
NetworkAction::AcceptFriendRequest { id } => {
let Some(token) = job.token.as_deref() else { return NetResponse::Error("not signed in".to_string()) };
let url = format!("{base}/api/friends/{id}/accept");
match client.post(&url).bearer_auth(token).send().await {
Ok(resp) if resp.status().is_success() => fetch_friends(client, base, Some(token)).await,
Ok(resp) => NetResponse::Error(error_message(resp).await),
Err(err) => NetResponse::Error(format!("network error: {err}")),
}
}
NetworkAction::RemoveFriendship { id } => {
let Some(token) = job.token.as_deref() else { return NetResponse::Error("not signed in".to_string()) };
let url = format!("{base}/api/friends/{id}");
match client.delete(&url).bearer_auth(token).send().await {
Ok(resp) if resp.status().is_success() => fetch_friends(client, base, Some(token)).await,
Ok(resp) => NetResponse::Error(error_message(resp).await),
Err(err) => NetResponse::Error(format!("network error: {err}")),
}
}
// Handled entirely by main.rs's own MultiplayerConnection instead
// (a persistent WebSocket, not a one-shot REST job) - these never
// actually reach this worker; this arm only exists so the match
// stays exhaustive over the shared NetworkAction enum.
NetworkAction::CreateMultiplayerRoom | NetworkAction::JoinMultiplayerRoom { .. } | NetworkAction::MultiplayerReady => {
NetResponse::Error("multiplayer action sent to the wrong network worker".to_string())
}
}
}
async fn login(client: &reqwest::Client, base: &str, username: &str, password: &str) -> NetResponse {
let url = format!("{base}/api/auth/token");
match client.post(&url).json(&serde_json::json!({ "username": username, "password": password })).send().await {
Ok(resp) if resp.status().is_success() => match resp.json::<TokenResponse>().await {
Ok(body) => NetResponse::LoginOk { username: body.user.username, token: Some(body.token) },
Err(err) => NetResponse::Error(format!("bad response: {err}")),
},
Ok(resp) => NetResponse::Error(error_message(resp).await),
Err(err) => NetResponse::Error(format!("network error: {err}")),
}
}
#[derive(Deserialize)]
struct FriendEntry {
friendship_id: String,
username: String,
}
#[derive(Deserialize)]
struct FriendsListBody {
friends: Vec<FriendEntry>,
incoming_requests: Vec<FriendEntry>,
outgoing_requests: Vec<FriendEntry>,
}
fn to_rows(entries: Vec<FriendEntry>) -> Vec<FriendRow> {
entries.into_iter().map(|e| FriendRow { friendship_id: e.friendship_id, username: e.username }).collect()
}
async fn fetch_friends(client: &reqwest::Client, base: &str, token: Option<&str>) -> NetResponse {
let Some(token) = token else { return NetResponse::Error("not signed in".to_string()) };
let url = format!("{base}/api/friends");
match client.get(&url).bearer_auth(token).send().await {
Ok(resp) if resp.status().is_success() => match resp.json::<FriendsListBody>().await {
Ok(body) => NetResponse::Friends {
list: to_rows(body.friends),
incoming: to_rows(body.incoming_requests),
outgoing: to_rows(body.outgoing_requests),
},
Err(err) => NetResponse::Error(format!("bad response: {err}")),
},
Ok(resp) => NetResponse::Error(error_message(resp).await),
Err(err) => NetResponse::Error(format!("network error: {err}")),
}
}
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