Pagination with cursor-based approach

                  module CursorPagination
  extend ActiveSupport::Concern

  private

  def paginate_with_cursor(scope, per_page: 20)
    cursor = params[:cursor]
    direction = params[:direction] || 'next'

    query = scope.limit(per_page + 1)

    if cursor.present?
      decoded_cursor = decode_cursor(cursor)
      if direction == 'next'
        query = query.where('id > ?', decoded_cursor)
      else
        query = query.where('id < ?', decoded_cursor).reverse_order
      end
    end

    records = query.to_a
    has_more = records.size > per_page
    records = records.take(per_page)

    {
      data: records,
      meta: {
        next_cursor: has_more ? encode_cursor(records.last.id) : nil,
        prev_cursor: cursor.present? ? encode_cursor(records.first.id) : nil,
        has_more: has_more
      }
    }
  end

  def encode_cursor(id)
    Base64.strict_encode64(id.to_s)
  end

  def decode_cursor(cursor)
    Base64.strict_decode64(cursor).to_i
  end
end