gistfile1.rb

  def self.paginate(mailing, filter = :delivered, page = 1, per_page = 30)
    page = page.to_i
    page = 1 if page < 1

    per_page = per_page.to_i
    per_page = 30 if per_page < 1
    total    = mailing.count(filter)

    continuation_manager = StatsContinuationManager.new(mailing.promotion, mailing,
                                                        { :page => page,
                                                          :per_page => per_page,
                                                          :which => filter })
    continuation = continuation_manager.retrieve

    attempts = mailing.get_promotion_attempts(filter,
                                              {:offset => (page - 1) * per_page,
                                               :limit => per_page,
                                               :continuation => continuation})
    continuation_manager.store(attempts.continuation)

    build_paginated_set mailing, attempts, page, per_page, total
  end