module Pagy::FoundationExtra

def pagy_foundation_nav(pagy, pagy_id: nil, link_extra: '', **vars)
  p_id = %( id="#{pagy_id}") if pagy_id
  link = pagy_link_proc(pagy, link_extra: link_extra)
  html = +%(<nav#{p_id} class="pagy-foundation-nav" aria-label="Pagination"><ul class="pagination">)
  html << pagy_foundation_prev_html(pagy, link)
  pagy.series(**vars).each do |item| # series example: [1, :gap, 7, 8, "9", 10, 11, :gap, 36]
    html << case item
            when Integer then %(<li>#{link.call item}</li>)                        # page link
            when String  then %(<li class="current">#{pagy.label_for(item)}</li>)                  # active page
            when :gap    then %(<li class="ellipsis gap" aria-hidden="true"></li>) # page gap
            else raise InternalError, "expected item types in series to be Integer, String or :gap; got #{item.inspect}"
            end
  end
  html << pagy_foundation_next_html(pagy, link)
  html << %(</ul></nav>)
end