| 1 | //! Live view transport replacing the app-local QuickJS Worker. Only immutable |
| 2 | //! projections cross back to Ratatui; network, raster and encoding stay here. |
| 3 | use super::{graphics, owner}; |
| 4 | use serde::{Deserialize, Serialize}; |
| 5 | use serde_json::{Value, json}; |
| 6 | use std::{ |
| 7 | io::{self, Read}, |
| 8 | path::PathBuf, |
| 9 | sync::{Arc, Mutex, mpsc}, |
| 10 | time::{Duration, Instant}, |
| 11 | }; |
| 12 | |
| 13 | #[derive(Clone, Deserialize, Serialize)] |
| 14 | pub struct Style { |
| 15 | pub r: f64, |
| 16 | pub g: f64, |
| 17 | pub b: f64, |
| 18 | pub alpha: f64, |
| 19 | pub hollow: bool, |
| 20 | pub channel: String, |
| 21 | pub arch: String, |
| 22 | } |
| 23 | #[derive(Clone, Deserialize, Serialize)] |
| 24 | pub struct Pose { |
| 25 | pub points: Vec<[f64; 2]>, |
| 26 | pub style: Style, |
| 27 | pub state: Value, |
| 28 | } |
| 29 | #[derive(Clone, Deserialize, Serialize)] |
| 30 | pub struct Activity { |
| 31 | pub label: String, |
| 32 | pub tool: Option<String>, |
| 33 | pub observed: bool, |
| 34 | pub parallel: usize, |
| 35 | } |
| 36 | #[derive(Clone, Deserialize, Serialize)] |
| 37 | #[serde(rename_all = "camelCase")] |
| 38 | pub struct Scene { |
| 39 | pub version: u8, |
| 40 | pub identity: String, |
| 41 | pub epoch: String, |
| 42 | pub tick: u64, |
| 43 | pub cursor: u64, |
| 44 | pub source: String, |
| 45 | pub source_revision: u64, |
| 46 | pub time_ms: f64, |
| 47 | pub digest: String, |
| 48 | pub behaviour: String, |
| 49 | pub producer_connected: bool, |
| 50 | pub storage_available: bool, |
| 51 | pub audio_owner: Option<String>, |
| 52 | pub audio_unavailable: bool, |
| 53 | pub points: Vec<[f64; 2]>, |
| 54 | pub style: Style, |
| 55 | pub state: Value, |
| 56 | pub still: Pose, |
| 57 | #[serde(default)] |
| 58 | pub appearance: super::appearance::Appearance, |
| 59 | #[serde(default)] |
| 60 | pub activity: Option<Activity>, |
| 61 | } |
| 62 | impl Scene { |
| 63 | fn valid(&self) -> bool { |
| 64 | self.version == 1 |
| 65 | && self.time_ms.is_finite() |
| 66 | && self.points.len() == 980 |
| 67 | && self.still.points.len() == 980 |
| 68 | && self |
| 69 | .points |
| 70 | .iter() |
| 71 | .chain(&self.still.points) |
| 72 | .flatten() |
| 73 | .all(|p| p.is_finite() && p.abs() <= 8.0) |
| 74 | } |
| 75 | } |
| 76 | #[derive(Clone)] |
| 77 | pub struct Presentation { |
| 78 | pub client: String, |
| 79 | pub scene: Scene, |
| 80 | pub cells: Vec<u8>, |
| 81 | pub image: Option<Vec<u8>>, |
| 82 | pub width: u16, |
| 83 | pub height: u16, |
| 84 | pub created: Instant, |
| 85 | pub frame_changed: Instant, |
| 86 | pub render_ms: f64, |
| 87 | pub bytes: usize, |
| 88 | } |
| 89 | #[derive(Clone, Default)] |
| 90 | pub struct View { |
| 91 | pub width: u16, |
| 92 | pub height: u16, |
| 93 | pub cell_width: f64, |
| 94 | pub cell_height: f64, |
| 95 | pub motion: bool, |
| 96 | pub pixels: bool, |
| 97 | pub visible: bool, |
| 98 | pub waiting: bool, |
| 99 | pub sound: bool, |
| 100 | } |
| 101 | #[derive(Clone)] |
| 102 | pub enum Command { |
| 103 | Observe(String), |
| 104 | Select, |
| 105 | Browser, |
| 106 | Window, |
| 107 | Export, |
| 108 | } |
| 109 | pub enum Notice { |
| 110 | Exported(PathBuf), |
| 111 | Message(String), |
| 112 | } |
| 113 | pub struct Worker { |
| 114 | pub tx: mpsc::SyncSender<Command>, |
| 115 | pub latest: Arc<Mutex<Option<Presentation>>>, |
| 116 | pub view: Arc<Mutex<View>>, |
| 117 | pub notices: mpsc::Receiver<Notice>, |
| 118 | } |
| 119 | |
| 120 | pub struct Client { |
| 121 | pub descriptor: owner::Descriptor, |
| 122 | http: reqwest::blocking::Client, |
| 123 | } |
| 124 | impl Client { |
| 125 | pub fn connect() -> io::Result<Self> { |
| 126 | let root = owner::directory()?; |
| 127 | let http = crate::tls::reqwest_blocking_client_builder() |
| 128 | .no_proxy() |
| 129 | .connect_timeout(Duration::from_millis(500)) |
| 130 | .timeout(Duration::from_secs(2)) |
| 131 | .build() |
| 132 | .map_err(io::Error::other)?; |
| 133 | let attempt = || -> io::Result<Self> { |
| 134 | Ok(Self { |
| 135 | descriptor: owner::descriptor(&root)?, |
| 136 | http: http.clone(), |
| 137 | }) |
| 138 | }; |
| 139 | if let Ok(client) = attempt() |
| 140 | && client.get("/v1/frame").is_ok() |
| 141 | { |
| 142 | return Ok(client); |
| 143 | } |
| 144 | #[cfg(not(test))] |
| 145 | { |
| 146 | use std::process::{Command as Process, Stdio}; |
| 147 | let mut process = Process::new(std::env::current_exe()?); |
| 148 | process |
| 149 | .args(["pet", "serve"]) |
| 150 | .stdin(Stdio::null()) |
| 151 | .stdout(Stdio::null()) |
| 152 | .stderr(Stdio::null()); |
| 153 | #[cfg(unix)] |
| 154 | { |
| 155 | use std::os::unix::process::CommandExt; |
| 156 | unsafe { |
| 157 | process.pre_exec(|| { |
| 158 | if libc::setsid() < 0 { |
| 159 | return Err(io::Error::last_os_error()); |
| 160 | } |
| 161 | Ok(()) |
| 162 | }); |
| 163 | } |
| 164 | } |
| 165 | #[cfg(windows)] |
| 166 | { |
| 167 | use std::os::windows::process::CommandExt; |
| 168 | process.creation_flags(0x08000000 | 0x00000008); |
| 169 | } |
| 170 | let mut child = process.spawn()?; |
| 171 | std::thread::spawn(move || { |
| 172 | let _ = child.wait(); |
| 173 | }); |
| 174 | } |
| 175 | let began = Instant::now(); |
| 176 | while began.elapsed() < Duration::from_secs(5) { |
| 177 | if let Ok(client) = attempt() |
| 178 | && client.get("/v1/frame").is_ok() |
| 179 | { |
| 180 | return Ok(client); |
| 181 | } |
| 182 | std::thread::sleep(Duration::from_millis(50)); |
| 183 | } |
| 184 | Err(io::Error::other( |
| 185 | "Shared pet unavailable. Run codewhale pet serve; existing recordings are preserved.", |
| 186 | )) |
| 187 | } |
| 188 | pub fn get(&self, path: &str) -> io::Result<Value> { |
| 189 | self.request(path, None) |
| 190 | } |
| 191 | pub fn post(&self, path: &str, body: &Value) -> io::Result<Value> { |
| 192 | self.request(path, Some(body)) |
| 193 | } |
| 194 | fn request(&self, path: &str, body: Option<&Value>) -> io::Result<Value> { |
| 195 | let url = format!("http://127.0.0.1:{}{path}", self.descriptor.port); |
| 196 | let request = if let Some(body) = body { |
| 197 | self.http.post(url).json(body) |
| 198 | } else { |
| 199 | self.http.get(url) |
| 200 | }; |
| 201 | let response = request |
| 202 | .bearer_auth(&self.descriptor.token) |
| 203 | .send() |
| 204 | .map_err(io::Error::other)?; |
| 205 | let status = response.status(); |
| 206 | let success = status.is_success(); |
| 207 | let bound = if path == "/v1/export" { |
| 208 | super::persistence::MAX_EXPORT_BYTES |
| 209 | } else { |
| 210 | 8 * 1024 * 1024 |
| 211 | }; |
| 212 | let mut bytes = Vec::new(); |
| 213 | response.take(bound as u64 + 1).read_to_end(&mut bytes)?; |
| 214 | if bytes.len() > bound { |
| 215 | return Err(io::Error::other("Pet response exceeds its bound")); |
| 216 | } |
| 217 | let value: Value = serde_json::from_slice(&bytes)?; |
| 218 | if !success { |
| 219 | let message = value["error"] |
| 220 | .as_str() |
| 221 | .unwrap_or("Shared pet connection failed"); |
| 222 | return Err(io::Error::new( |
| 223 | if status == reqwest::StatusCode::CONFLICT && !message.contains("storage") { |
| 224 | io::ErrorKind::InvalidInput |
| 225 | } else { |
| 226 | io::ErrorKind::Other |
| 227 | }, |
| 228 | message, |
| 229 | )); |
| 230 | } |
| 231 | Ok(value) |
| 232 | } |
| 233 | pub fn open_browser(&self) -> io::Result<()> { |
| 234 | let url = format!( |
| 235 | "http://127.0.0.1:{}/#{}", |
| 236 | self.descriptor.port, self.descriptor.token |
| 237 | ); |
| 238 | webbrowser::open(&url).map_err(io::Error::other) |
| 239 | } |
| 240 | pub fn open_window(&self) -> io::Result<()> { |
| 241 | #[cfg(target_os = "macos")] |
| 242 | { |
| 243 | use std::process::{Command as Process, Stdio}; |
| 244 | let mut process = Process::new("open"); |
| 245 | if let Some(path) = std::env::var_os("CODEWHALE_PET_APP") { |
| 246 | process.arg(path); |
| 247 | } else { |
| 248 | process.args(["-a", "Codewhale Pet"]); |
| 249 | } |
| 250 | process |
| 251 | .args(["--args", "--companion"]) |
| 252 | .stdin(Stdio::null()) |
| 253 | .stdout(Stdio::null()) |
| 254 | .stderr(Stdio::null()); |
| 255 | if process.status()?.success() { |
| 256 | return Ok(()); |
| 257 | } |
| 258 | Err(io::Error::other( |
| 259 | "Build or install the Codewhale Pet app to open its companion window", |
| 260 | )) |
| 261 | } |
| 262 | #[cfg(not(target_os = "macos"))] |
| 263 | { |
| 264 | Err(io::Error::other( |
| 265 | "The native companion window is currently available on macOS", |
| 266 | )) |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | impl Worker { |
| 271 | pub fn start(session: Option<String>) -> io::Result<Self> { |
| 272 | let (tx, rx) = mpsc::sync_channel(128); |
| 273 | let (latest, (notices_tx, notices)) = (Arc::new(Mutex::new(None)), mpsc::sync_channel(16)); |
| 274 | let output = latest.clone(); |
| 275 | let view = Arc::new(Mutex::new(View { |
| 276 | width: 40, |
| 277 | height: 8, |
| 278 | ..View::default() |
| 279 | })); |
| 280 | let settings = view.clone(); |
| 281 | std::thread::Builder::new() |
| 282 | .name("pet-view".into()) |
| 283 | .spawn(move || { |
| 284 | if let Err(e) = run(rx, &output, ¬ices_tx, &settings, session) { |
| 285 | let _ = notices_tx.try_send(Notice::Message(e.to_string())); |
| 286 | } |
| 287 | })?; |
| 288 | Ok(Self { |
| 289 | tx, |
| 290 | latest, |
| 291 | notices, |
| 292 | view, |
| 293 | }) |
| 294 | } |
| 295 | } |
| 296 | fn run( |
| 297 | rx: mpsc::Receiver<Command>, |
| 298 | output: &Mutex<Option<Presentation>>, |
| 299 | notices: &mpsc::SyncSender<Notice>, |
| 300 | settings: &Mutex<View>, |
| 301 | session: Option<String>, |
| 302 | ) -> io::Result<()> { |
| 303 | use sha2::{Digest, Sha256}; |
| 304 | let source = session.as_ref().map(|s| { |
| 305 | format!( |
| 306 | "session:{}", |
| 307 | Sha256::digest(s.as_bytes()) |
| 308 | .iter() |
| 309 | .take(10) |
| 310 | .map(|b| format!("{b:02x}")) |
| 311 | .collect::<String>() |
| 312 | ) |
| 313 | }); |
| 314 | let mut renderer = graphics::Renderer::default(); |
| 315 | let id = uuid::Uuid::new_v4().to_string(); |
| 316 | let mut client = Client::connect()?; |
| 317 | |
| 318 | let mut scene: Option<Scene> = None; |
| 319 | let mut previous = None; |
| 320 | let mut changed = Instant::now(); |
| 321 | let mut fetched = Instant::now() - Duration::from_secs(1); |
| 322 | let mut encoded = Instant::now() - Duration::from_secs(1); |
| 323 | let mut events = Vec::new(); |
| 324 | let mut producer_seq = None; |
| 325 | let mut sequence = 0u64; |
| 326 | let mut action: Option<Value> = None; |
| 327 | let mut last_action = Instant::now() - Duration::from_secs(1); |
| 328 | let mut last_produce = Instant::now(); |
| 329 | let mut last_audio = Instant::now(); |
| 330 | let mut last_failure = Instant::now() - Duration::from_secs(10); |
| 331 | loop { |
| 332 | let view = settings |
| 333 | .lock() |
| 334 | .map_err(|_| io::Error::other("Pet view lock failed"))? |
| 335 | .clone(); |
| 336 | match rx.recv_timeout(Duration::from_millis(2)) { |
| 337 | Ok(command) => match command { |
| 338 | Command::Observe(text) => { |
| 339 | if events.len() < 64 { |
| 340 | events.push(serde_json::from_str::<Value>(&text)?) |
| 341 | } else { |
| 342 | events.clear(); |
| 343 | producer_seq = None; |
| 344 | } |
| 345 | } |
| 346 | Command::Select => { |
| 347 | if let (Some(s), Some(source)) = (&scene, &source) |
| 348 | && action.is_none() |
| 349 | { |
| 350 | action = Some( |
| 351 | json!({"identity":s.identity,"client":id,"seq":sequence+1,"source_revision":s.source_revision,"action":{"kind":"select","source":source}}), |
| 352 | ); |
| 353 | } else { |
| 354 | let _ = notices.try_send(Notice::Message( |
| 355 | "Save this session and wait for the pet connection before selecting its source.".into(), |
| 356 | )); |
| 357 | } |
| 358 | } |
| 359 | Command::Browser => { |
| 360 | if let Err(e) = client.open_browser() { |
| 361 | let _ = notices.try_send(Notice::Message(e.to_string())); |
| 362 | } |
| 363 | } |
| 364 | Command::Window => { |
| 365 | if let Err(e) = client.open_window() { |
| 366 | let _ = notices.try_send(Notice::Message(e.to_string())); |
| 367 | } |
| 368 | } |
| 369 | Command::Export => { |
| 370 | let result = client.get("/v1/export").and_then(|r| { |
| 371 | super::persistence::export( |
| 372 | session.as_deref().ok_or_else(|| { |
| 373 | io::Error::other("Save the terminal session before exporting") |
| 374 | })?, |
| 375 | &serde_json::to_vec(&r)?, |
| 376 | ) |
| 377 | }); |
| 378 | let _ = notices.try_send(match result { |
| 379 | Ok(path) => Notice::Exported(path), |
| 380 | Err(e) => Notice::Message(e.to_string()), |
| 381 | }); |
| 382 | } |
| 383 | }, |
| 384 | Err(mpsc::RecvTimeoutError::Disconnected) => { |
| 385 | let _ = client.post("/v1/audio", &json!({"client":id,"enabled":false})); |
| 386 | return Ok(()); |
| 387 | } |
| 388 | Err(mpsc::RecvTimeoutError::Timeout) => {} |
| 389 | } |
| 390 | if fetched.elapsed() >= Duration::from_millis(if view.visible { 30 } else { 400 }) { |
| 391 | match client |
| 392 | .get("/v1/frame") |
| 393 | .and_then(|value| serde_json::from_value::<Scene>(value).map_err(io::Error::other)) |
| 394 | { |
| 395 | Ok(next) if next.valid() => { |
| 396 | if scene |
| 397 | .as_ref() |
| 398 | .is_none_or(|s| s.epoch != next.epoch || s.identity != next.identity) |
| 399 | { |
| 400 | previous = None; |
| 401 | changed = Instant::now(); |
| 402 | producer_seq = None; |
| 403 | events.clear(); |
| 404 | } else if scene.as_ref().is_some_and(|s| s.tick != next.tick) { |
| 405 | previous = scene.clone(); |
| 406 | changed = Instant::now(); |
| 407 | } |
| 408 | if next.source == "unattached" |
| 409 | && let Some(source) = &source |
| 410 | && action.is_none() |
| 411 | { |
| 412 | action = Some( |
| 413 | json!({"identity":next.identity,"client":id,"seq":sequence+1,"source_revision":next.source_revision,"action":{"kind":"select","source":source}}), |
| 414 | ); |
| 415 | } |
| 416 | scene = Some(next); |
| 417 | fetched = Instant::now(); |
| 418 | } |
| 419 | _ => { |
| 420 | fetched = Instant::now(); |
| 421 | events.clear(); |
| 422 | producer_seq = None; |
| 423 | if last_failure.elapsed() > Duration::from_secs(3) { |
| 424 | last_failure = Instant::now(); |
| 425 | let _ = notices.try_send(Notice::Message( |
| 426 | "Shared pet reconnecting · unobserved".into(), |
| 427 | )); |
| 428 | if let Ok(next) = Client::connect() { |
| 429 | client = next; |
| 430 | } |
| 431 | } |
| 432 | continue; |
| 433 | } |
| 434 | } |
| 435 | } |
| 436 | let Some(s) = &scene else { continue }; |
| 437 | if last_action.elapsed() >= Duration::from_millis(250) |
| 438 | && let Some(pending) = &action |
| 439 | { |
| 440 | last_action = Instant::now(); |
| 441 | match client.post("/v1/action", pending) { |
| 442 | Ok(_) => { |
| 443 | let selected = pending["action"]["kind"] == "select"; |
| 444 | sequence += 1; |
| 445 | action = None; |
| 446 | if selected { |
| 447 | producer_seq = None; |
| 448 | events.clear(); |
| 449 | } |
| 450 | } |
| 451 | Err(e) => { |
| 452 | if e.kind() == io::ErrorKind::InvalidInput { |
| 453 | action = None; |
| 454 | } |
| 455 | if last_failure.elapsed() > Duration::from_secs(3) { |
| 456 | last_failure = Instant::now(); |
| 457 | let _ = notices.try_send(Notice::Message(e.to_string())); |
| 458 | } |
| 459 | } |
| 460 | } |
| 461 | } |
| 462 | if source.as_deref() == Some(s.source.as_str()) |
| 463 | && last_produce.elapsed() >= Duration::from_millis(100) |
| 464 | { |
| 465 | let seq = producer_seq.map_or(0, |seq| seq + 1); |
| 466 | if seq == 0 { |
| 467 | events.clear(); |
| 468 | } |
| 469 | let body = json!({"identity":s.identity,"epoch":s.epoch,"client":id,"source":s.source,"source_revision":s.source_revision,"seq":seq,"waiting":view.waiting,"events":events}); |
| 470 | producer_seq = client.post("/v1/producer", &body).ok().map(|_| seq); |
| 471 | events.clear(); |
| 472 | last_produce = Instant::now(); |
| 473 | } else if source.as_deref() != Some(s.source.as_str()) { |
| 474 | events.clear(); |
| 475 | producer_seq = None; |
| 476 | } |
| 477 | if last_audio.elapsed() >= Duration::from_millis(500) { |
| 478 | let _=client.post("/v1/audio",&json!({"client":id,"enabled":view.sound&&view.visible&&changed.elapsed()<Duration::from_millis(500)})); |
| 479 | last_audio = Instant::now(); |
| 480 | } |
| 481 | if view.visible |
| 482 | && encoded.elapsed() |
| 483 | >= Duration::from_millis(if view.motion && view.pixels { |
| 484 | 16 |
| 485 | } else if view.motion { |
| 486 | 33 |
| 487 | } else { |
| 488 | 200 |
| 489 | }) |
| 490 | { |
| 491 | let began = Instant::now(); |
| 492 | let mut pose = if view.motion { |
| 493 | Pose { |
| 494 | points: s.points.clone(), |
| 495 | style: s.style.clone(), |
| 496 | state: s.state.clone(), |
| 497 | } |
| 498 | } else { |
| 499 | s.still.clone() |
| 500 | }; |
| 501 | if !s.producer_connected { |
| 502 | pose.style.hollow = true; |
| 503 | } |
| 504 | let fraction = if view.motion { |
| 505 | (changed.elapsed().as_secs_f64() * 30.0).clamp(0.0, 1.0) |
| 506 | } else { |
| 507 | 1.0 |
| 508 | }; |
| 509 | renderer.set_appearance(&s.appearance); |
| 510 | let (cells, image) = renderer.render( |
| 511 | &pose, |
| 512 | previous.as_ref().filter(|_| view.motion), |
| 513 | fraction, |
| 514 | &view, |
| 515 | if view.motion { s.time_ms / 1000.0 } else { 0.0 }, |
| 516 | )?; |
| 517 | let bytes = image.as_ref().map_or(0, Vec::len); |
| 518 | if let Ok(mut slot) = output.lock() { |
| 519 | *slot = Some(Presentation { |
| 520 | client: id.clone(), |
| 521 | scene: s.clone(), |
| 522 | cells, |
| 523 | image, |
| 524 | width: view.width, |
| 525 | height: view.height, |
| 526 | created: Instant::now(), |
| 527 | frame_changed: changed, |
| 528 | render_ms: began.elapsed().as_secs_f64() * 1000.0, |
| 529 | bytes, |
| 530 | }); |
| 531 | } |
| 532 | encoded = began; |
| 533 | } |
| 534 | } |
| 535 | } |
| 536 |