You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: prepare_service.rb
    path of file: ./repos/gitlabhq/app/services/import
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module Import
  class PrepareService < ::BaseService
    def execute
      uploader = UploadService.new(project,
    
    def execute
      uploader = UploadService.new(project, params[:file]).execute

      if uploader
        enqueue_import(uploader.upload)

        ServiceResponse.success(message: success_message)
      else
        ServiceResponse.error(message: _('File upload error.'))
      end