Add AuthorSync to sync author's attributes.

lib/decentralised_book_index/metadata/author.ex

@@ -18,7 +18,7 @@ defmodule DecentralisedBookIndex.Metadata.Author do
   end
 
   actions do
-    defaults [:read, :update, :destroy]
+    defaults [:read, :destroy]
 
     create :create do
       primary? true
@@ -62,6 +62,22 @@ defmodule DecentralisedBookIndex.Metadata.Author do
       end
     end
 
+    create :sync do
+      accept [:id, :name, :description, :author_alias_registry_id]
+
+      change fn changeset, _ ->
+        registry_id = Ash.Changeset.get_attribute(changeset, :author_alias_registry_id)
+
+        if registry_id == nil do
+          {:ok, registry} = DecentralisedBookIndex.Metadata.create_author_alias_registry()
+
+          Ash.Changeset.force_change_attribute(changeset, :author_alias_registry_id, registry.id)
+        else
+          changeset
+        end
+      end
+    end
+
     read :by_id do
       argument :id, :uuid, allow_nil?: false
       get? true
@@ -109,13 +125,18 @@ defmodule DecentralisedBookIndex.Metadata.Author do
       pagination offset?: true, default_limit: 10
     end
 
+    update :update do
+      primary? true
+      accept [:name, :description, :avatar_url]
+    end
+
     update :assign_avatar_image do
       accept [:avatar_url]
     end
   end
 
   attributes do
-    uuid_primary_key :id
+    uuid_primary_key :id, writable?: true
 
     attribute :name, :string do
       allow_nil? false

lib/decentralised_book_index/sync/sync/author_sync.ex

@@ -0,0 +1,25 @@
+defmodule DecentralisedBookIndex.Sync.AuthorSync do
+  alias DecentralisedBookIndex.Metadata.Author
+
+  def create_update(author_attrs) do
+    case DecentralisedBookIndex.Metadata.get_author_by_id(author_attrs.id) do
+      {:ok, author} ->
+        author_attrs =
+          author_attrs
+          |> Map.delete(:id)
+          |> Map.delete(:author_alias_registry_id)
+
+        author
+        |> Ash.Changeset.for_update(:update, author_attrs)
+        |> Ash.update!()
+
+        :ok
+      {:error, %Ash.Error.Query.NotFound{}} ->
+        DecentralisedBookIndex.Metadata.Author
+        |> Ash.Changeset.for_create(:sync, author_attrs)
+        |> Ash.create!()
+
+        :ok
+    end
+  end
+end