refactor: email sync changes

lib/mv/accounts/user/changes/sync_email_to_member.ex

@@ -1,55 +1,32 @@
 defmodule Mv.Accounts.User.Changes.SyncEmailToMember do
   @moduledoc """
   Synchronizes user email changes to the linked member.
-
-  When a user's email is updated and the user is linked to a member,
-  this change automatically updates the member's email to match.
-
-  This ensures bidirectional email synchronization with User.email
-  as the source of truth.
-
-  Uses `around_transaction` to guarantee atomicity - both the user
-  and member updates happen in the SAME database transaction.
+  Uses `around_transaction` for atomicity - both updates in the same transaction.
   """
   use Ash.Resource.Change
-  alias Mv.EmailSync.Helpers
+  alias Mv.EmailSync.{Helpers, Loader}
 
   @impl true
   def change(changeset, _opts, context) do
     cond do
-      # Skip if already syncing to avoid recursion
-      Map.get(context, :syncing_email, false) ->
-        changeset
-
-      # Only proceed if email is actually changing
-      not Ash.Changeset.changing_attribute?(changeset, :email) ->
-        changeset
-
-      # Apply the sync logic
-      true ->
-        new_email = Ash.Changeset.get_attribute(changeset, :email)
-
-        # around_transaction receives the changeset (cs) from Ash
-        # and a callback that executes the actual database operation
-        Ash.Changeset.around_transaction(changeset, fn cs, callback ->
-          result = callback.(cs)
-
-          with {:ok, user} <- Helpers.extract_record(result),
-               linked_member <- get_linked_member(user) do
-            Helpers.sync_email_to_linked_record(result, linked_member, new_email)
-          else
-            _ -> result
-          end
-        end)
+      Map.get(context, :syncing_email, false) -> changeset
+      not Ash.Changeset.changing_attribute?(changeset, :email) -> changeset
+      true -> sync_email(changeset)
     end
   end
 
-  defp get_linked_member(%{member_id: nil}), do: nil
+  defp sync_email(changeset) do
+    new_email = Ash.Changeset.get_attribute(changeset, :email)
 
-  defp get_linked_member(%{member_id: member_id}) do
-    case Ash.get(Mv.Membership.Member, member_id) do
-      {:ok, member} -> member
-      {:error, _} -> nil
-    end
+    Ash.Changeset.around_transaction(changeset, fn cs, callback ->
+      result = callback.(cs)
+
+      with {:ok, user} <- Helpers.extract_record(result),
+           linked_member <- Loader.get_linked_member(user) do
+        Helpers.sync_email_to_linked_record(result, linked_member, new_email)
+      else
+        _ -> result
+      end
+    end)
   end
 end