radicle-cob: Component conversions

`TypeName` and `ObjectId` are expected to be used in reference
names.

Add `From` conversions to `Component` for both of these types to make
it easier for using them with `git-ref-format`.

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

radicle-cob/src/object.rs

@@ -6,6 +6,7 @@
 use std::{convert::TryFrom as _, fmt, str::FromStr};
 
 use git_ext::Oid;
+use git_ref_format::{Component, RefString};
 use serde::{Deserialize, Serialize};
 use thiserror::Error;
 
@@ -83,3 +84,12 @@ impl<'de> Deserialize<'de> for ObjectId {
         Ok(ObjectId(oid))
     }
 }
+
+impl From<&ObjectId> for Component<'_> {
+    fn from(id: &ObjectId) -> Self {
+        let refstr = RefString::try_from(id.0.to_string())
+            .expect("collaborative object id's are valid ref strings");
+        Component::from_refstring(refstr)
+            .expect("collaborative object id's are valid refname components")
+    }
+}

radicle-cob/src/type_name.rs

@@ -5,6 +5,7 @@
 
 use std::{fmt, str::FromStr};
 
+use git_ref_format::{Component, RefString};
 use serde::{Deserialize, Serialize};
 use thiserror::Error;
 
@@ -53,6 +54,15 @@ impl FromStr for TypeName {
     }
 }
 
+impl From<&TypeName> for Component<'_> {
+    fn from(name: &TypeName) -> Self {
+        let refstr = RefString::try_from(name.0.to_string())
+            .expect("collaborative object type names are valid ref strings");
+        Component::from_refstring(refstr)
+            .expect("collaborative object type names are valid refname components")
+    }
+}
+
 #[cfg(test)]
 mod test {
     use std::str::FromStr as _;