refactor(domain): move DB string conversions out of domain enums

crates/adapters/postgres/src/follow.rs

@@ -1,5 +1,24 @@
 use async_trait::async_trait;
 use chrono::{DateTime, Utc};
+
+fn follow_state_from_str(s: &str) -> domain::models::social::FollowState {
+    use domain::models::social::FollowState;
+    match s {
+        "pending" => FollowState::Pending,
+        "rejected" => FollowState::Rejected,
+        _ => FollowState::Accepted,
+    }
+}
+
+fn follow_state_as_str(state: &domain::models::social::FollowState) -> &'static str {
+    use domain::models::social::FollowState;
+    match state {
+        FollowState::Pending => "pending",
+        FollowState::Accepted => "accepted",
+        FollowState::Rejected => "rejected",
+    }
+}
+
 use domain::{
     errors::DomainError,
     models::{
@@ -31,7 +50,7 @@ impl FollowRepository for PgFollowRepository {
         )
         .bind(f.follower_id.as_uuid())
         .bind(f.following_id.as_uuid())
-        .bind(f.state.as_str())
+        .bind(follow_state_as_str(&f.state))
         .bind(&f.ap_id)
         .bind(f.created_at)
         .execute(&self.pool)
@@ -77,7 +96,7 @@ impl FollowRepository for PgFollowRepository {
         .map(|o| o.map(|r| Follow {
             follower_id: UserId::from_uuid(r.follower_id),
             following_id: UserId::from_uuid(r.following_id),
-            state: FollowState::from_db_str(&r.state),
+            state: follow_state_from_str(&r.state),
             ap_id: r.ap_id,
             created_at: r.created_at,
         }))
@@ -92,7 +111,7 @@ impl FollowRepository for PgFollowRepository {
         sqlx::query("UPDATE follows SET state=$3 WHERE follower_id=$1 AND following_id=$2")
             .bind(follower_id.as_uuid())
             .bind(following_id.as_uuid())
-            .bind(state.as_str())
+            .bind(follow_state_as_str(state))
             .execute(&self.pool)
             .await
             .map_err(|e| DomainError::Internal(e.to_string()))