add template clone api endpoint

app/controllers/api/templates_clone_controller.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+module Api
+  class TemplatesCloneController < ApiBaseController
+    load_and_authorize_resource :template
+
+    def create
+      authorize!(:manage, @template)
+
+      template = current_account.templates.new(source: :api)
+
+      template.application_key = params[:application_key]
+      template.name = params[:name] || "#{@template.name} (Clone)"
+      template.account = @template.account
+      template.author = current_user
+      template.assign_attributes(@template.slice(:folder_id, :fields, :schema, :submitters))
+
+      if params[:folder_name].present?
+        template.folder = TemplateFolders.find_or_create_by_name(current_user, params[:folder_name])
+      end
+
+      template.save!
+
+      Templates::CloneAttachments.call(template:, original_template: @template)
+
+      render json: template.as_json(serialize_params)
+    end
+
+    private
+
+    def serialize_params
+      {
+        include: { author: { only: %i[id email first_name last_name] },
+                   documents: { only: %i[id uuid], methods: %i[url filename] } }
+      }
+    end
+  end
+end

config/routes.rb

@@ -42,6 +42,7 @@ Rails.application.routes.draw do
       end
     end
     resources :templates, only: %i[update show index destroy] do
+      resources :clone, only: %i[create], controller: 'templates_clone'
       resources :submissions, only: %i[index create]
       resources :documents, only: %i[create], controller: 'templates_documents'
     end