class Github::PageIterator

def next
  return nil unless has_next?
  response = if next_page < 1
    parsed_query = parse_query(next_page_uri.split(QUERY_STR_SEP).last)
    params = {}
    if parsed_query.keys.include?('last_sha')
      params['sha'] = parsed_query['last_sha']
    end
    params['per_page'] = parse_per_page_number(next_page_uri)
    page_request next_page_uri.split(QUERY_STR_SEP)[0], params
  else
    page_request next_page_uri.split(QUERY_STR_SEP)[0],
                            'page' => next_page,
                            'per_page'=> parse_per_page_number(next_page_uri)
  end
  update_page_links response.links
  response
end