Add the sync task for Publisher.

lib/decentralised_book_index/metadata/publisher.ex

@@ -25,6 +25,10 @@ defmodule DecentralisedBookIndex.Metadata.Publisher do
       accept [:name]
     end
 
+    create :sync_create do
+      accept [:id, :name, :inserted_at, :updated_at, :dbi_server_id]
+    end
+
     read :by_id do
       argument :id, :uuid, allow_nil?: false
       get? true
@@ -41,17 +45,24 @@ defmodule DecentralisedBookIndex.Metadata.Publisher do
 
       pagination offset?: true, default_limit: 10
     end
+
+    update :sync do
+      accept [:name, :inserted_at, :updated_at, :dbi_server_id]
+    end
   end
 
   attributes do
-    uuid_primary_key :id
+    uuid_primary_key :id, writable?: true
 
     attribute :name, :string do
       allow_nil? false
       public? true
     end
 
-    timestamps()
+    timestamps() do
+      writable? true
+      public? true
+    end
   end
 
   relationships do

lib/decentralised_book_index/sync/data_transformers/publisher_transformer.ex

@@ -0,0 +1,22 @@
+defmodule DecentralisedBookIndex.Sync.DataTransformers.PublisherTransformer do
+  def from_json(json_body) do
+    attrs =
+      if Map.has_key?(json_body, "data") do
+        %{
+          id: get_in(json_body, ["data", "id"]),
+          name: get_in(json_body, ["data", "attributes", "name"]),
+          inserted_at: get_in(json_body, ["data", "attributes", "inserted_at"]),
+          updated_at: get_in(json_body, ["data", "attributes", "updated_at"]),
+        }
+      else
+        %{
+          id: get_in(json_body, ["id"]),
+          name: get_in(json_body, ["attributes", "name"]),
+          inserted_at: get_in(json_body, ["attributes", "inserted_at"]),
+          updated_at: get_in(json_body, ["attributes", "updated_at"]),
+        }
+      end
+
+    {:ok, attrs}
+  end
+end

lib/decentralised_book_index/sync/sync/publisher_sync.ex

@@ -0,0 +1,29 @@
+defmodule DecentralisedBookIndex.Sync.PublisherSync do
+  alias DecentralisedBookIndex.Metadata
+  alias DecentralisedBookIndex.Metadata.Publisher
+
+  def create_update(attrs, server_id) do
+    case Metadata.get_publisher_by_id(attrs.id) do
+      {:ok, publisher} ->
+        attrs =
+          attrs
+          |> Map.delete(:id)
+
+        publisher
+        |> Ash.Changeset.for_update(:sync, attrs)
+        |> Ash.update!()
+
+        :ok
+      {:error, %Ash.Error.Query.NotFound{}} ->
+        attrs =
+          attrs
+          |> Map.put(:dbi_server_id, server_id)
+
+        Publisher
+        |> Ash.Changeset.for_create(:sync_create, attrs)
+        |> Ash.create!()
+
+        :ok
+    end
+  end
+end

lib/decentralised_book_index/sync/sync_tasks/sync_publishers_task.ex

@@ -0,0 +1,34 @@
+defmodule DecentralisedBookIndex.SyncTasks.SyncPublishersTask do
+  alias DecentralisedBookIndex.Sync.ApiClients.FetchJsons
+  alias DecentralisedBookIndex.Sync.DataTransformers.PublisherTransformer
+  alias DecentralisedBookIndex.Sync.PublisherSync
+
+  alias DecentralisedBookIndex.Metadata.DBIServer
+
+  def sync(%DBIServer{} = server) do
+    url = "#{server.url}/api/v1/json/publishers"
+    FetchJsons.get(url, sync_closure(server))
+
+    server
+  end
+
+  def sync_chunk(json_chunk, server_id) do
+    for json <- json_chunk do
+      with {:ok, attrs} <- PublisherTransformer.from_json(json),
+           :ok <- PublisherSync.create_update(attrs, server_id) do
+        :ok
+      else
+        {:error, reason} ->
+          Logger.error("Pipeline error: #{inspect(reason)}")
+      end
+    end
+
+    []
+  end
+
+  def sync_closure(server) do
+    fn json_chunk ->
+      sync_chunk(json_chunk, server.id)
+    end
+  end
+end