code refactor

Reviewed-on: #26

crates/api-types/tests/social_dto_test.rs

@@ -0,0 +1,21 @@
+use api_types::social::FollowStateDto;
+
+#[test]
+fn follow_state_dto_serializes_to_lowercase_strings() {
+    assert_eq!(
+        serde_json::to_string(&FollowStateDto::None).unwrap(),
+        "\"none\""
+    );
+    assert_eq!(
+        serde_json::to_string(&FollowStateDto::Pending).unwrap(),
+        "\"pending\""
+    );
+    assert_eq!(
+        serde_json::to_string(&FollowStateDto::Accepted).unwrap(),
+        "\"accepted\""
+    );
+    assert_eq!(
+        serde_json::to_string(&FollowStateDto::Rejected).unwrap(),
+        "\"rejected\""
+    );
+}