Split replaytool into multiple files

1 files changed, 127 insertions, 0 deletions

diff --git a/server/replaytool/src/replay.rs b/server/replaytool/src/replay.rs
new file mode 100644
index 00000000..d442f599
--- /dev/null
+++ b/server/replaytool/src/replay.rs
@@ -0,0 +1,127 @@
+/*
+    Hurry Curry! - a game about cooking
+    Copyright (C) 2025 Hurry Curry! Contributors
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, version 3 of the License only.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+*/
+
+use crate::Event;
+use anyhow::{anyhow, Result};
+use async_compression::tokio::bufread::ZstdDecoder;
+use futures_util::{SinkExt, StreamExt};
+use hurrycurry_protocol::{Message, PacketC, PacketS};
+use log::{debug, info, warn};
+use std::path::Path;
+use tokio::{
+    fs::File,
+    io::{AsyncBufReadExt, BufReader},
+    net::TcpListener,
+};
+use tokio_tungstenite::tungstenite;
+
+pub async fn replay(ws_listener: &TcpListener, input: &Path) -> Result<()> {
+    let mut file =
+        BufReader::new(ZstdDecoder::new(BufReader::new(File::open(&input).await?))).lines();
+
+    let mut next_event =
+        serde_json::from_str::<Event>(&file.next_line().await?.ok_or(anyhow!("eof"))?)?;
+    let mut time = 0.;
+    let mut paused = false;
+
+    info!("ready");
+    let (sock, addr) = ws_listener.accept().await?;
+    let Ok(mut sock) = tokio_tungstenite::accept_async(sock).await else {
+        warn!("invalid ws handshake");
+        return Ok(());
+    };
+    info!("{addr} connected via ws");
+
+    sock.send(tokio_tungstenite::tungstenite::Message::Text(
+        serde_json::to_string(&PacketC::ReplayStart).unwrap().into(),
+    ))
+    .await?;
+    while let Some(Ok(message)) = sock.next().await {
+        let mut send = async |p: PacketC| {
+            sock.send(tokio_tungstenite::tungstenite::Message::Text(
+                serde_json::to_string(&p).unwrap().into(),
+            ))
+            .await
+        };
+        match message {
+            tungstenite::Message::Text(line) => {
+                let packet: PacketS = match serde_json::from_str(&line) {
+                    Ok(p) => p,
+                    Err(e) => {
+                        warn!("invalid packet: {e}");
+                        break;
+                    }
+                };
+                debug!("<- {packet:?}");
+
+                match packet {
+                    PacketS::Join { .. } => {
+                        send(PacketC::ServerMessage {
+                            message: Message::Translation {
+                                id: "s.replay.cannot_join".to_owned(),
+                                params: vec![],
+                            },
+                            error: true,
+                        })
+                        .await?;
+                    }
+                    PacketS::Idle { paused: pause } => {
+                        // Cannot display server hint like in main server because cant address them to spectators.
+                        paused = pause;
+                        send(PacketC::Pause { state: pause }).await?
+                    }
+                    PacketS::ReplayTick { dt } => {
+                        if paused {
+                            continue;
+                        }
+                        time += dt;
+                        while next_event.ts < time {
+                            debug!("<- {:?}", next_event.packet);
+                            if !matches!(next_event.packet, PacketC::SetIngame { state: false, .. })
+                            {
+                                send(next_event.packet).await?;
+                            }
+
+                            if let Some(next) = &file.next_line().await? {
+                                next_event = serde_json::from_str::<Event>(next)?;
+                            } else {
+                                info!("reached end");
+                                send(PacketC::ServerMessage {
+                                    message: Message::Text("End of Replay".to_string()),
+                                    error: false,
+                                })
+                                .await?;
+                                send(PacketC::ReplayStop).await?;
+                                next_event = Event {
+                                    ts: f64::INFINITY,
+                                    packet: PacketC::FlushMap,
+                                };
+                                continue;
+                            };
+                        }
+                    }
+                    x => warn!("unhandled client packet: {x:?}"),
+                }
+            }
+            tungstenite::Message::Close(_) => break,
+            _ => (),
+        }
+    }
+    info!("{addr} left");
+    Ok(())
+}