add uuid conversion to rust

upid_rs/Cargo.toml

@@ -12,6 +12,7 @@ edition = "2021"
 
 [dependencies]
 rand = { version = "0.8" }
+uuid = { version = "1", optional = true }
 
 [lib]
 name = "upid"

upid_rs/src/lib.rs

@@ -34,6 +34,8 @@
 // https://github.com/dylanhart/ulid-rs
 
 mod b32;
+#[cfg(feature = "uuid")]
+mod uuid;
 
 pub use crate::b32::{DecodeError, ENCODE};
 

upid_rs/src/uuid.rs

@@ -0,0 +1,30 @@
+//! Convert between Upid and Uuid.
+
+use crate::Upid;
+use uuid::Uuid;
+
+impl From<Uuid> for Upid {
+    fn from(uuid: Uuid) -> Self {
+        Upid(uuid.as_u128())
+    }
+}
+
+impl From<Upid> for Uuid {
+    fn from(upid: Upid) -> Self {
+        Uuid::from_u128(upid.0)
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn uuid_cycle() {
+        let want = Upid::new("user");
+        let uuid: Uuid = want.into();
+        let got: Upid = uuid.into();
+
+        assert_eq!(got, want)
+    }
+}