1 files changed, 64 insertions, 0 deletions
diff --git a/crates/core/tedge_lib/src/config/address.rs b/crates/core/tedge_lib/src/config/address.rs
new file mode 100644
index 00000000..e829c37c
--- /dev/null
+++ b/crates/core/tedge_lib/src/config/address.rs
@@ -0,0 +1,64 @@
+/// An address of a plugin
+///
+/// This type is a helper type for specifying a plugin address in the configuration.
+#[derive(Debug, Eq, PartialEq, Hash, serde::Deserialize, tedge_api::Config)]
+#[serde(transparent)]
+pub struct Address(String);
+
+impl AsRef<str> for Address {
+    fn as_ref(&self) -> &str {
+        &self.0
+    }
+}
+
+impl Address {
+    /// Build the config helper [Address](crate::config::Address) object into a usable API
+    /// [Address](tedge_api::Address), that can be used to send messages to.
+    pub fn build<RB, PD>(
+        &self,
+        pd: &PD,
+    ) -> Result<tedge_api::Address<RB>, tedge_api::error::DirectoryError>
+    where
+        RB: tedge_api::address::ReceiverBundle,
+        PD: tedge_api::PluginDirectory,
+    {
+        pd.get_address_for(&self.0)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    #[derive(serde::Deserialize)]
+    struct A {
+        addr: super::Address,
+    }
+
+    #[derive(serde::Deserialize)]
+    struct G {
+        addrs: crate::config::OneOrMany<super::Address>,
+    }
+
+    #[test]
+    fn test_deser() {
+        let s = r#"
+            addr = "foo"
+        "#;
+
+        let a: A = toml::from_str(s).unwrap();
+        assert_eq!(a.addr.0, "foo");
+    }
+
+    #[test]
+    fn test_deser_group() {
+        let s = r#"
+            addrs = [ "foo", "bar", "baz" ]
+        "#;
+
+        let g: G = toml::from_str(s).unwrap();
+        let addrs = g.addrs.into_vec();
+        assert_eq!(addrs.get(0).map(AsRef::as_ref), Some("foo"));
+        assert_eq!(addrs.get(1).map(AsRef::as_ref), Some("bar"));
+        assert_eq!(addrs.get(2).map(AsRef::as_ref), Some("baz"));
+        assert_eq!(addrs.get(3), None);
+    }
+}