iframe-proxy | Sunbelt Computer Software

31 lines (28 loc) · 760 Bytes

require 'nokogiri'
def toc_data(page_content)
  html_doc = Nokogiri::HTML::DocumentFragment.parse(page_content)
  # get a flat list of headers
  headers = []
  html_doc.css('h1, h2, h3').each do |header|
    headers.push({
      id: header.attribute('id').to_s,
      content: header.children,
      title: header.children.to_s.gsub(/<[^>]*>/, ''),
      level: header.name[1].to_i,
      children: []
  [3,2].each do |header_level|
    header_to_nest = nil
    headers = headers.reject do |header|
      if header[:level] == header_level
        header_to_nest[:children].push header if header_to_nest
        true
        header_to_nest = header if header[:level] < header_level
        false

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