refactor templates controller

app/controllers/template_documents_controller.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class TemplateDocumentsController < ApplicationController
+  load_and_authorize_resource :template
+
+  def create
+    return head :unprocessable_entity if params[:blobs].blank? && params[:files].blank?
+
+    documents = Templates::CreateAttachments.call(@template, params)
+
+    schema = documents.map do |doc|
+      { attachment_uuid: doc.uuid, name: doc.filename.base }
+    end
+
+    render json: {
+      schema:,
+      documents: documents.as_json(
+        methods: %i[metadata signed_uuid],
+        include: {
+          preview_images: { methods: %i[url metadata filename] }
+        }
+      )
+    }
+  rescue Templates::CreateAttachments::PdfEncrypted
+    render json: { error: 'PDF encrypted' }, status: :unprocessable_entity
+  end
+end