snapshotdir tx_offset method

Author: Shubham8287

crates/paths/src/server.rs

@@ -220,6 +220,12 @@ impl SnapshotDirPath {
         let invalid_path = self.0.with_extension("invalid_snapshot");
         fs::rename(self, invalid_path)
     }
+
+    pub fn tx_offset(&self) -> Option<u64> {
+        self.0
+            .file_stem()
+            .and_then(|s| s.to_str()?.split('.').next()?.parse::<u64>().ok())
+    }
 }
 
 path_type! {
@@ -297,4 +303,14 @@ mod tests {
         sdd.pid_file()?;
         Ok(())
     }
+
+    #[test]
+    fn test_snapshot_parsing() -> Result<()> {
+        let tempdir = TempDir::new()?;
+        let sdd = ServerDataDir(tempdir.path().to_path_buf());
+        const SNAPSHOT_OFFSET: u64 = 123456;
+        let snapshot_dir = sdd.replica(1).snapshots().snapshot_dir(SNAPSHOT_OFFSET);
+        assert_eq!(Some(SNAPSHOT_OFFSET), snapshot_dir.tx_offset());
+        Ok(())
+    }
 }