refactor of the process_items vs process file

gistfile1.rb

 def self.process_file(uploaded_file)
    items = []
    CSV.foreach(uploaded_file, headers: false) do |row|  
      items.push(row[0].to_i)
    end
    process_items(items)
  end

  def self.process_items(items)
    clearancing_status = create_clearancing_status
    items.each do |i|  
      potential_item_id = i.to_i
      clearancing_error = what_is_the_clearancing_error(potential_item_id)
      if clearancing_error
        clearancing_status.errors << clearancing_error
      else
        clearancing_status.item_ids_to_clearance << potential_item_id
      end
    end
    clearance_items(clearancing_status) 
  end