module Hydroponics
  module Actions
    # Dupe
    #
    # Change the total rows of a table to target_count, either by duplicating
    # the first row or deleting rows from the end.
    def dupe(table, data)
      table = table.to_sym
      current_count = @db[table].count
      target_count = data['count'] || current_count

      if target_count > current_count
        first_row = @db[table].first
        first_row.delete(:id)
        @db[table].multi_insert([first_row] * (target_count - current_count))
      elsif current_count > target_count
        cutoff_id = @db[table].map(:id)[target_count-1]
        @db[table].filter("id > #{cutoff_id}").delete
      end

      @db[table].count.to_s
    end
  end
end