Savestate stuff.

.gitignore

@@ -1,2 +1,3 @@
 target
-mat_data.txt
+mat_data.txt
+save_state

noita-proxy/Cargo.lock

@@ -1997,7 +1997,7 @@ checksum = "2bf50223579dc7cdcfb3bfcacf7069ff68243f8c363f62ffa99cf000a6b9c451"
 
 [[package]]
 name = "noita-proxy"
-version = "0.15.3"
+version = "0.16.0"
 dependencies = [
  "argh",
  "bincode",

noita-proxy/Cargo.toml

@@ -5,7 +5,7 @@ resolver = "2"
 [package]
 name = "noita-proxy"
 description = "Noita Entangled Worlds companion app."
-version = "0.15.3"
+version = "0.16.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

noita-proxy/assets/lang/en-US/main.ftl

@@ -88,3 +88,10 @@ connect_settings_autostart = Start the game automatically
 Higher-values-result-in-less-performance-impact = Higher values result in less performance impact.
 World-will-be-synced-every-this-many-frames = World will be synced every this many frames.
 
+
+## Savestate
+
+New-game = New game
+Continue = Continue
+savestate_desc = Savestate from a previous run has been detected. Do you wish to continue that run, or to start a new game (and reset the savestate)?
+An-in-progress-run-has-been-detected = An in-progress run has been detected.

noita-proxy/assets/lang/ja-JP/main.ftl

@@ -88,3 +88,10 @@ connect_settings_autostart = ゲームを自動的に開始する
 Higher-values-result-in-less-performance-impact = Higher values result in less performance impact.
 World-will-be-synced-every-this-many-frames = World will be synced every this many frames.
 
+
+## Savestate
+
+New-game = New game
+Continue = Continue
+savestate_desc = Savestate from a previous run has been detected. Do you wish to continue that run, or to start a new game (and reset the savestate)?
+An-in-progress-run-has-been-detected = An in-progress run has been detected.

noita-proxy/assets/lang/ru-RU/main.ftl

@@ -69,4 +69,10 @@ error_lobby_does_not_exist = Лобби не существует.
 ## Game settings
 
 Higher-values-result-in-less-performance-impact = Higher values result in less performance impact
-World-will-be-synced-every-this-many-frames = World will be synced every this many frames
+World-will-be-synced-every-this-many-frames = World will be synced every this many frames
+## Savestate
+
+New-game = New game
+Continue = Continue
+savestate_desc = Savestate from a previous run has been detected. Do you wish to continue that run, or to start a new game (and reset the savestate)?
+An-in-progress-run-has-been-detected = An in-progress run has been detected.

noita-proxy/src/bookkeeping/mod.rs

@@ -2,4 +2,5 @@
 pub mod mod_manager;
 pub mod noita_launcher;
 pub mod releases;
+pub mod save_state;
 pub mod self_update;

noita-proxy/src/bookkeeping/save_state.rs

@@ -0,0 +1,89 @@
+use std::{
+    fs,
+    path::PathBuf,
+    sync::{
+        atomic::{self, AtomicBool},
+        Arc,
+    },
+};
+
+use tracing::{error, info, warn};
+
+pub trait SaveStateEntry: bitcode::Encode + bitcode::DecodeOwned {
+    const FILENAME: &'static str;
+}
+
+struct SaveStateInner {
+    game_started: AtomicBool,
+}
+
+/// Allows persisting extra run state (like chunks). Cleared between runs.
+#[derive(Clone)]
+pub struct SaveState {
+    inner: Arc<SaveStateInner>,
+    path: PathBuf,
+    has_savestate: bool,
+}
+
+impl SaveState {
+    pub(crate) fn new(path: PathBuf) -> Self {
+        let has_savestate = path.join("run_info.bit").exists();
+        info!("Has savestate: {has_savestate}");
+        if let Err(err) = fs::create_dir_all(&path) {
+            error!("Error while creating directories: {err}");
+        }
+        let path = path.canonicalize().unwrap_or(path);
+        info!("Will save to: {}", path.display());
+        Self {
+            path,
+            inner: Arc::new(SaveStateInner {
+                game_started: false.into(),
+            }),
+            has_savestate,
+        }
+    }
+
+    pub(crate) fn save<D: SaveStateEntry>(&self, data: &D) {
+        if !self.inner.game_started.load(atomic::Ordering::SeqCst) {
+            info!("Skipping save of {}, game not started yet", D::FILENAME);
+            return;
+        }
+
+        let path = self.path_for_filename(D::FILENAME);
+        let encoded = bitcode::encode(data);
+        if let Err(err) = fs::write(&path, encoded) {
+            error!("Error while saving to {:?}: {err}", D::FILENAME);
+        }
+        info!("Saved {}", path.display());
+    }
+
+    pub(crate) fn load<D: SaveStateEntry>(&self) -> Option<D> {
+        let path = self.path_for_filename(D::FILENAME);
+        let data = fs::read(&path)
+            .inspect_err(|err| warn!("Could not read {:?}: {err}", D::FILENAME))
+            .ok()?;
+        bitcode::decode(&data)
+            .inspect_err(|err| error!("Could not decode {:?}: {err}", D::FILENAME))
+            .ok()
+    }
+
+    pub(crate) fn mark_game_started(&self) {
+        self.inner
+            .game_started
+            .store(true, atomic::Ordering::SeqCst);
+    }
+
+    pub(crate) fn reset(&self) {
+        fs::remove_dir_all(&self.path).ok();
+        fs::create_dir_all(&self.path).ok();
+    }
+
+    /// true if had a savestate initially.
+    pub(crate) fn has_savestate(&self) -> bool {
+        self.has_savestate
+    }
+
+    fn path_for_filename(&self, filename: &str) -> PathBuf {
+        self.path.join(format!("{filename}.bit"))
+    }
+}

noita-proxy/src/lib.rs

@@ -1,12 +1,9 @@
 use std::{
-    fmt::Display,
+    fmt::Display, net::SocketAddr, ops::Deref, sync::{atomic::Ordering, Arc}, thread::JoinHandle, time::Duration
-    net::SocketAddr,
-    sync::{atomic::Ordering, Arc},
-    time::Duration,
 };
 
 use bitcode::{Decode, Encode};
-use bookkeeping::noita_launcher::{LaunchTokenResult, NoitaLauncher};
+use bookkeeping::{noita_launcher::{LaunchTokenResult, NoitaLauncher}, save_state::SaveState};
 use clipboard::{ClipboardContext, ClipboardProvider};
 use eframe::egui::{
     self, Align2, Button, Color32, Context, DragValue, FontDefinitions, FontFamily, InnerResponse,
@@ -15,7 +12,7 @@ use eframe::egui::{
 use egui_plot::{Plot, PlotPoint, PlotUi, Text};
 use lang::{set_current_locale, tr, LANGS};
 use mod_manager::{Modmanager, ModmanagerSettings};
-use net::{omni::PeerVariant, steam_networking::ExtraPeerState, NetManagerInit};
+use net::{omni::PeerVariant, steam_networking::ExtraPeerState, NetManagerInit, RunInfo};
 use self_update::SelfUpdateManager;
 use serde::{Deserialize, Serialize};
 use steamworks::{LobbyId, SteamAPIInitError};
@@ -61,11 +58,28 @@ impl Default for GameSettings {
     }
 }
 
+pub struct NetManStopOnDrop(pub Arc<net::NetManager>, Option<JoinHandle<()>>);
+
+impl Deref for NetManStopOnDrop {
+    type Target = Arc<net::NetManager>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl Drop for NetManStopOnDrop {
+    fn drop(&mut self) {
+        self.0.continue_running.store(false, Ordering::Relaxed);
+        self.1.take().unwrap().join().unwrap();
+    }
+} 
+
 enum AppState {
     Connect,
     ModManager,
     Netman {
-        netman: Arc<net::NetManager>,
+        netman: NetManStopOnDrop,
         noita_launcher: NoitaLauncher,
     },
     Error {
@@ -73,6 +87,7 @@ enum AppState {
     },
     SelfUpdate,
     LangPick,
+    AskSavestateReset,
 }
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -103,7 +118,8 @@ pub struct App {
     state: AppState,
     modmanager: Modmanager,
     steam_state: Result<steam_helper::SteamState, SteamAPIInitError>,
-    saved_state: AppSavedState,
+    app_saved_state: AppSavedState,
+    run_save_state: SaveState,
     modmanager_settings: ModmanagerSettings,
     self_update: SelfUpdateManager,
     show_map_plot: bool,
@@ -170,7 +186,7 @@ impl App {
             state,
             modmanager: Modmanager::default(),
             steam_state: steam_helper::SteamState::new(),
-            saved_state,
+            app_saved_state: saved_state,
             modmanager_settings,
             self_update: SelfUpdateManager::new(),
             show_map_plot: false,
@@ -178,6 +194,7 @@ impl App {
             lobby_id_field: "".to_string(),
             args,
             can_start_automatically: false,
+            run_save_state: SaveState::new("./save_state/".into())
         }
     }
 
@@ -187,13 +204,14 @@ impl App {
         } else {
             None
         };
-        let my_nickname = self.saved_state.nickname.clone().or(steam_nickname);
+        let my_nickname = self.app_saved_state.nickname.clone().or(steam_nickname);
-        NetManagerInit { my_nickname }
+        NetManagerInit { my_nickname, save_state: self.run_save_state.clone() }
     }
 
     fn change_state_to_netman(&mut self, netman: Arc<net::NetManager>) {
+        let handle = netman.clone().start();
         self.state = AppState::Netman {
-            netman,
+            netman: NetManStopOnDrop(netman, Some(handle)),
             noita_launcher: NoitaLauncher::new(
                 &self.modmanager_settings.game_exe_path,
                 self.args.launch_cmd.as_deref(),
@@ -207,15 +225,21 @@ impl App {
         let peer = Peer::host(bind_addr, None).unwrap();
         let netman = net::NetManager::new(PeerVariant::Tangled(peer), self.get_netman_init());
         self.set_netman_settings(&netman);
-        netman.clone().start();
         self.change_state_to_netman(netman);
     }
 
     fn set_netman_settings(&mut self, netman: &Arc<net::NetManager>) {
+        let run_info: Option<RunInfo> = self.run_save_state.load();
         let mut settings = netman.settings.lock().unwrap();
-        *settings = self.saved_state.game_settings.clone();
+        *settings = self.app_saved_state.game_settings.clone();
-        if !self.saved_state.game_settings.use_constant_seed {
+        if !self.app_saved_state.game_settings.use_constant_seed {
-            settings.seed = rand::random();
+            if let Some(info) = run_info {
+                settings.seed = info.seed;
+                info!("Using saved seed: {}", settings.seed);
+            } else {
+                settings.seed = rand::random();
+                info!("Using random seed: {}", settings.seed);
+            }
         } else {
             info!("Using constant seed: {}", settings.seed);
         }
@@ -225,7 +249,6 @@ impl App {
     fn start_connect(&mut self, addr: SocketAddr) {
         let peer = Peer::connect(addr, None).unwrap();
         let netman = net::NetManager::new(PeerVariant::Tangled(peer), self.get_netman_init());
-        netman.clone().start();
         self.change_state_to_netman(netman);
     }
 
@@ -236,7 +259,6 @@ impl App {
         );
         let netman = net::NetManager::new(PeerVariant::Steam(peer), self.get_netman_init());
         self.set_netman_settings(&netman);
-        netman.clone().start();
         self.change_state_to_netman(netman);
     }
 
@@ -253,13 +275,12 @@ impl App {
         );
 
         let netman = net::NetManager::new(PeerVariant::Steam(peer), self.get_netman_init());
-        netman.clone().start();
         self.change_state_to_netman(netman);
     }
 
     fn connect_screen(&mut self, ctx: &egui::Context) {
         egui::CentralPanel::default().show(ctx, |ui| {
-            if self.saved_state.times_started % 20 == 0 {
+            if self.app_saved_state.times_started % 20 == 0 {
                 let image = egui::Image::new(egui::include_image!("../assets/longleg.png"))
                     .texture_options(TextureOptions::NEAREST);
                 image.paint_at(ui, ui.ctx().screen_rect());
@@ -293,7 +314,7 @@ impl App {
                     ui.set_min_size(ui.available_size());
 
                     let lang_label = self
-                        .saved_state
+                        .app_saved_state
                         .lang_id
                         .clone()
                         .unwrap_or_default()
@@ -309,7 +330,7 @@ impl App {
                     }
                     let secret_active = ui.input(|i| i.modifiers.ctrl && i.key_down(Key::D));
                     if secret_active && ui.button("reset all data").clicked() {
-                        self.saved_state = Default::default();
+                        self.app_saved_state = Default::default();
                         self.modmanager_settings = Default::default();
                         self.state = AppState::LangPick;
                     }
@@ -370,8 +391,8 @@ impl App {
                         self.start_server();
                     }
 
-                    ui.text_edit_singleline(&mut self.saved_state.addr);
+                    ui.text_edit_singleline(&mut self.app_saved_state.addr);
-                    let addr = self.saved_state.addr.parse();
+                    let addr = self.app_saved_state.addr.parse();
                     ui.add_enabled_ui(addr.is_ok(), |ui| {
                         if ui.button(tr("ip_connect")).clicked() {
                             if let Ok(addr) = addr {
@@ -386,7 +407,7 @@ impl App {
 
     fn show_game_settings(&mut self, ui: &mut Ui) {
         heading_with_underline(ui, tr("connect_settings"));
-        let game_settings = &mut self.saved_state.game_settings;
+        let game_settings = &mut self.app_saved_state.game_settings;
 
         ui.label(tr("connect_settings_debug"));
         ui.checkbox(
@@ -445,7 +466,7 @@ impl App {
 
         heading_with_underline(ui, tr("connect_settings_local"));
         ui.checkbox(
-            &mut self.saved_state.start_game_automatically,
+            &mut self.app_saved_state.start_game_automatically,
             tr("connect_settings_autostart"),
         );
     }
@@ -494,6 +515,14 @@ impl App {
 
         ctx.set_fonts(font_definitions);
     }
+    
+    fn switch_to_connect(&mut self) {
+        self.state = if self.run_save_state.has_savestate() {
+            AppState::AskSavestateReset
+        } else {
+            AppState::Connect
+        };
+    }
 }
 
 fn draw_bg(ui: &mut Ui) {
@@ -596,7 +625,7 @@ impl eframe::App for App {
                     if accept_local && !local_connected {
                         match noita_launcher.launch_token() {
                             LaunchTokenResult::Ok(mut token) => {
-                                let start_auto = self.can_start_automatically && self.saved_state.start_game_automatically;
+                                let start_auto = self.can_start_automatically && self.app_saved_state.start_game_automatically;
                                 if start_auto || ui.button(tr("launcher_start_game")).clicked() {
                                     info!("Starting the game now");
                                     token.start_game();
@@ -646,7 +675,7 @@ impl eframe::App for App {
                     egui::Window::new(tr("connect_settings")).open(&mut show).show(ctx, |ui| {
                         self.show_game_settings(ui);
                         if ui.button(tr("netman_apply_settings")).clicked() {
-                            *netman.pending_settings.lock().unwrap() = self.saved_state.game_settings.clone();
+                            *netman.pending_settings.lock().unwrap() = self.app_saved_state.game_settings.clone();
                         }
                     });
                     self.show_settings = show;
@@ -677,7 +706,7 @@ impl eframe::App for App {
                         )
                     });
                 if self.modmanager.is_done() {
-                    self.state = AppState::Connect;
+                    self.switch_to_connect();
                 }
             }
             AppState::SelfUpdate => {
@@ -700,7 +729,7 @@ impl eframe::App for App {
                             ui.set_max_width(200.0);
                             ui.vertical_centered_justified(|ui| {
                                 if ui.button(lang.name()).clicked() {
-                                    self.saved_state.lang_id = Some(lang.id());
+                                    self.app_saved_state.lang_id = Some(lang.id());
                                     set_current_locale(lang.id())
                                 }
                             });
@@ -710,11 +739,29 @@ impl eframe::App for App {
                         }
                     });
             }
+            AppState::AskSavestateReset => {
+                egui::Window::new(tr("An-in-progress-run-has-been-detected"))
+                    .auto_sized()
+                    .anchor(Align2::CENTER_CENTER, [0.0, 0.0])
+                    .show(ctx, |ui| {
+                        ui.label(tr("savestate_desc"));
+                        ui.horizontal(|ui| {
+                            if ui.button(tr("Continue")).clicked() {
+                                self.state = AppState::Connect;
+                            }
+                            if ui.button(tr("New-game")).clicked() {
+                                self.state = AppState::Connect;
+                                self.run_save_state.reset();
+                            }
+                        });
+                    }
+                );
+            },
         };
     }
 
     fn save(&mut self, storage: &mut dyn eframe::Storage) {
-        eframe::set_value(storage, eframe::APP_KEY, &self.saved_state);
+        eframe::set_value(storage, eframe::APP_KEY, &self.app_saved_state);
         eframe::set_value(storage, MODMANAGER, &self.modmanager_settings);
     }
 }

noita-proxy/src/net.rs

@@ -1,3 +1,4 @@
+use bitcode::{Decode, Encode};
 use messages::{MessageRequest, NetMsg};
 use omni::OmniPeerId;
 use proxy_opt::ProxyOpt;
@@ -8,7 +9,7 @@ use std::{
     io::{self, Write},
     net::{SocketAddr, TcpListener, TcpStream},
     sync::{atomic::AtomicBool, Arc, Mutex},
-    thread,
+    thread::{self, JoinHandle},
     time::{Duration, Instant},
 };
 use tracing::debug;
@@ -18,7 +19,10 @@ use tangled::Reliability;
 use tracing::{error, info, warn};
 use tungstenite::{accept, WebSocket};
 
-use crate::GameSettings;
+use crate::{
+    bookkeeping::save_state::{SaveState, SaveStateEntry},
+    GameSettings,
+};
 
 pub mod messages;
 mod proxy_opt;
@@ -48,6 +52,15 @@ pub(crate) fn ws_encode_mod(peer: omni::OmniPeerId, data: &[u8]) -> tungstenite:
     tungstenite::Message::Binary(buf)
 }
 
+#[derive(Encode, Decode)]
+pub(crate) struct RunInfo {
+    pub(crate) seed: u64,
+}
+
+impl SaveStateEntry for RunInfo {
+    const FILENAME: &'static str = "run_info";
+}
+
 pub(crate) struct NetInnerState {
     pub(crate) ws: Option<WebSocket<TcpStream>>,
     world: WorldManager,
@@ -75,6 +88,7 @@ pub mod omni;
 
 pub struct NetManagerInit {
     pub my_nickname: Option<String>,
+    pub save_state: SaveState,
 }
 
 pub struct NetManager {
@@ -157,7 +171,11 @@ impl NetManager {
 
         let mut state = NetInnerState {
             ws: None,
-            world: WorldManager::new(self.is_host(), self.peer.my_id().unwrap()),
+            world: WorldManager::new(
+                self.is_host(),
+                self.peer.my_id().unwrap(),
+                self.init_settings.save_state.clone(),
+            ),
         };
 
         let mut last_iter = Instant::now();
@@ -299,6 +317,7 @@ impl NetManager {
     }
 
     fn on_ws_connection(self: &Arc<NetManager>, state: &mut NetInnerState) {
+        self.init_settings.save_state.mark_game_started();
         info!("New stream connected");
         let stream_ref = &state.ws.as_ref().unwrap().get_ref();
         stream_ref.set_nonblocking(true).ok();
@@ -378,7 +397,7 @@ impl NetManager {
         }
     }
 
-    pub fn start(self: Arc<NetManager>) {
+    pub fn start(self: Arc<NetManager>) -> JoinHandle<()> {
         info!("Starting netmanager");
         thread::spawn(move || {
             let result = self.clone().start_inner();
@@ -388,7 +407,7 @@ impl NetManager {
             }
             self.stopped
                 .store(true, std::sync::atomic::Ordering::Relaxed);
-        });
+        })
     }
 
     fn resend_game_settings(&self) {
@@ -408,6 +427,7 @@ impl NetManager {
             Some("game_over") => {
                 if self.is_host() {
                     info!("Game over, resending game settings");
+                    self.init_settings.save_state.reset();
                     {
                         let mut settings = self.pending_settings.lock().unwrap().clone();
                         if !settings.use_constant_seed {
@@ -453,3 +473,17 @@ impl NetManager {
         }
     }
 }
+
+impl Drop for NetManager {
+    fn drop(&mut self) {
+        if self.is_host() {
+            let run_info = RunInfo {
+                seed: self.settings.lock().unwrap().seed,
+            };
+            self.init_settings.save_state.save(&run_info);
+            info!("Saved run info");
+        } else {
+            info!("Skip saving run info: not a host");
+        }
+    }
+}

noita-proxy/src/net/world.rs

@@ -8,6 +8,8 @@ use world_model::{ChunkCoord, ChunkData, ChunkDelta, WorldModel};
 
 pub use world_model::encoding::NoitaWorldUpdate;
 
+use crate::bookkeeping::save_state::{SaveState, SaveStateEntry};
+
 use super::{
     messages::{Destination, MessageRequest},
     omni::OmniPeerId,
@@ -109,6 +111,7 @@ impl ChunkState {
 pub(crate) struct WorldManager {
     is_host: bool,
     my_peer_id: OmniPeerId,
+    save_state: SaveState,
     /// We receive changes from other clients here, intending to send them to Noita.
     inbound_model: WorldModel,
     /// We use that to create changes to be sent to other clients.
@@ -129,15 +132,17 @@ pub(crate) struct WorldManager {
 }
 
 impl WorldManager {
-    pub(crate) fn new(is_host: bool, my_peer_id: OmniPeerId) -> Self {
+    pub(crate) fn new(is_host: bool, my_peer_id: OmniPeerId, save_state: SaveState) -> Self {
+        let chunk_storage = save_state.load().unwrap_or_default();
         WorldManager {
             is_host,
             my_peer_id,
+            save_state,
             inbound_model: Default::default(),
             outbound_model: Default::default(),
             authority_map: Default::default(),
             // TODO this needs to be persisted between proxy restarts.
-            chunk_storage: Default::default(),
+            chunk_storage,
             chunk_state: Default::default(),
             emitted_messages: Default::default(),
             current_update: 0,
@@ -423,6 +428,19 @@ impl WorldManager {
     }
 }
 
+impl Drop for WorldManager {
+    fn drop(&mut self) {
+        if self.is_host {
+            self.save_state.save(&self.chunk_storage);
+            info!("Saved chunk data");
+        }
+    }
+}
+
+impl SaveStateEntry for FxHashMap<ChunkCoord, ChunkData> {
+    const FILENAME: &'static str = "world_chunks";
+}
+
 #[cfg(test)]
 mod test {
     use std::{fs::File, io::BufReader};