bump k-ap 0.5.0, decompose repo traits, LocalObject, ActivityStreamsType enum, split follow modules

crates/adapters/sqlite-federation/src/follow/migration.rs

@@ -0,0 +1,47 @@
+use anyhow::Result;
+use async_trait::async_trait;
+use k_ap::FollowMigration;
+
+use crate::SqliteFederationRepository;
+
+#[async_trait]
+impl FollowMigration for SqliteFederationRepository {
+    async fn migrate_follower_actor(
+        &self,
+        old_actor_url: &str,
+        new_actor_url: &str,
+    ) -> Result<Vec<uuid::Uuid>> {
+        let candidates: Vec<String> = sqlx::query_scalar(
+            "SELECT local_user_id FROM ap_following
+             WHERE remote_actor_url = ?1
+               AND local_user_id NOT IN (
+                   SELECT local_user_id FROM ap_following WHERE remote_actor_url = ?2
+               )",
+        )
+        .bind(old_actor_url)
+        .bind(new_actor_url)
+        .fetch_all(&self.pool)
+        .await?;
+
+        if candidates.is_empty() {
+            return Ok(vec![]);
+        }
+
+        sqlx::query(
+            "UPDATE ap_following SET remote_actor_url = ?1
+             WHERE remote_actor_url = ?2
+               AND local_user_id NOT IN (
+                   SELECT local_user_id FROM ap_following WHERE remote_actor_url = ?1
+               )",
+        )
+        .bind(new_actor_url)
+        .bind(old_actor_url)
+        .execute(&self.pool)
+        .await?;
+
+        candidates
+            .into_iter()
+            .map(|s| uuid::Uuid::parse_str(&s).map_err(|e| anyhow::anyhow!(e)))
+            .collect()
+    }
+}