fix: disconnect VPN when sleep

crates/gpapi/Cargo.toml

@@ -18,7 +18,7 @@ roxmltree.workspace = true
 serde.workspace = true
 specta = { workspace = true, features = ["derive"] }
 urlencoding.workspace = true
-tokio.workspace = true
+tokio = { workspace = true, features = ["process", "signal", "macros"] }
 serde_json.workspace = true
 whoami.workspace = true
 tempfile.workspace = true

crates/gpapi/src/service/event.rs

@@ -7,4 +7,5 @@ use super::vpn_state::VpnState;
 pub enum WsEvent {
   VpnState(VpnState),
   ActiveGui,
+  ResumeConnection,
 }

crates/gpapi/src/utils/endpoint.rs

@@ -1,10 +1,9 @@
-use tokio::fs;
-
-use crate::GP_SERVICE_LOCK_FILE;
+use super::lock_file::gpservice_lock_info;
 
 async fn read_port() -> anyhow::Result<String> {
-  let port = fs::read_to_string(GP_SERVICE_LOCK_FILE).await?;
-  Ok(port.trim().to_string())
+  let lock_info = gpservice_lock_info().await?;
+
+  Ok(lock_info.port.to_string())
 }
 
 pub async fn http_endpoint() -> anyhow::Result<String> {

crates/gpapi/src/utils/lock_file.rs

@@ -1,19 +1,24 @@
 use std::path::PathBuf;
 
+use thiserror::Error;
+use tokio::fs;
+
 pub struct LockFile {
   path: PathBuf,
+  pid: u32,
 }
 
 impl LockFile {
-  pub fn new<P: Into<PathBuf>>(path: P) -> Self {
-    Self { path: path.into() }
+  pub fn new<P: Into<PathBuf>>(path: P, pid: u32) -> Self {
+    Self { path: path.into(), pid }
   }
 
   pub fn exists(&self) -> bool {
     self.path.exists()
   }
 
-  pub fn lock(&self, content: impl AsRef<[u8]>) -> anyhow::Result<()> {
+  pub fn lock(&self, content: &str) -> anyhow::Result<()> {
+    let content = format!("{}:{}", self.pid, content);
     std::fs::write(&self.path, content)?;
     Ok(())
   }
@@ -37,3 +42,87 @@ impl LockFile {
     }
   }
 }
+
+#[derive(Error, Debug)]
+pub enum LockFileError {
+  #[error("Failed to read lock file: {0}")]
+  IoError(#[from] std::io::Error),
+
+  #[error("Invalid lock file format: expected 'pid:port'")]
+  InvalidFormat,
+
+  #[error("Invalid PID value: {0}")]
+  InvalidPid(std::num::ParseIntError),
+
+  #[error("Invalid port value: {0}")]
+  InvalidPort(std::num::ParseIntError),
+}
+
+pub struct LockInfo {
+  pub pid: u32,
+  pub port: u32,
+}
+
+impl LockInfo {
+  async fn from_file(path: impl AsRef<std::path::Path>) -> Result<Self, LockFileError> {
+    let content = fs::read_to_string(path).await?;
+    Self::parse(&content)
+  }
+
+  fn parse(content: &str) -> Result<Self, LockFileError> {
+    let mut parts = content.trim().split(':');
+
+    let pid = parts
+      .next()
+      .ok_or(LockFileError::InvalidFormat)?
+      .parse()
+      .map_err(LockFileError::InvalidPid)?;
+
+    let port = parts
+      .next()
+      .ok_or(LockFileError::InvalidFormat)?
+      .parse()
+      .map_err(LockFileError::InvalidPort)?;
+
+    // Ensure there are no extra parts after pid:port
+    if parts.next().is_some() {
+      return Err(LockFileError::InvalidFormat);
+    }
+
+    Ok(Self { pid, port })
+  }
+}
+
+pub async fn gpservice_lock_info() -> Result<LockInfo, LockFileError> {
+  LockInfo::from_file(crate::GP_SERVICE_LOCK_FILE).await
+}
+
+#[cfg(test)]
+mod tests {
+  use super::*;
+
+  #[test]
+  fn test_parse_valid_input() {
+    let info = LockInfo::parse("1234:8080").unwrap();
+    assert_eq!(info.pid, 1234);
+    assert_eq!(info.port, 8080);
+  }
+
+  #[test]
+  fn test_parse_invalid_format() {
+    assert!(matches!(
+      LockInfo::parse("123:456:789"),
+      Err(LockFileError::InvalidFormat)
+    ));
+  }
+
+  #[test]
+  fn test_parse_invalid_numbers() {
+    assert!(matches!(LockInfo::parse("abc:8080"), Err(LockFileError::InvalidPid(_))));
+
+    assert!(matches!(
+      LockInfo::parse("1234:abc"),
+      Err(LockFileError::InvalidPort(_))
+    ));
+  }
+}