Refactor using Tauri (#278)

crates/gpapi/src/utils/lock_file.rs

@@ -0,0 +1,39 @@
+use std::path::PathBuf;
+
+pub struct LockFile {
+  path: PathBuf,
+}
+
+impl LockFile {
+  pub fn new<P: Into<PathBuf>>(path: P) -> Self {
+    Self { path: path.into() }
+  }
+
+  pub fn exists(&self) -> bool {
+    self.path.exists()
+  }
+
+  pub fn lock(&self, content: impl AsRef<[u8]>) -> anyhow::Result<()> {
+    std::fs::write(&self.path, content)?;
+    Ok(())
+  }
+
+  pub fn unlock(&self) -> anyhow::Result<()> {
+    std::fs::remove_file(&self.path)?;
+    Ok(())
+  }
+
+  pub async fn check_health(&self) -> bool {
+    match std::fs::read_to_string(&self.path) {
+      Ok(content) => {
+        let url = format!("http://127.0.0.1:{}/health", content.trim());
+
+        match reqwest::get(&url).await {
+          Ok(resp) => resp.status().is_success(),
+          Err(_) => false,
+        }
+      }
+      Err(_) => false,
+    }
+  }
+}