111 lines
3.8 KiB
Ruby
111 lines
3.8 KiB
Ruby
# frozen_string_literal: true
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module Onebox
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module Engine
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class WikipediaOnebox
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include Engine
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include LayoutSupport
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include HTML
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matches_regexp(%r{^https?://.*\.wikipedia\.(com|org)})
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always_https
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private
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def data
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paras = []
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text = ""
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# Detect section Hash in the url and retrive the related paragraphs. if no hash provided the first few paragraphs will be used
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# Author Lidlanca
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# Date 9/8/2014
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if (m_url_hash = @url.match(%r{#([^/?]+)})) # extract url hash
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m_url_hash_name = m_url_hash[1]
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end
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if m_url_hash.nil? # no hash found in url
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paras = raw.search("p") # default get all the paras
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else
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section_header_title = raw.xpath("//span[@id='#{CGI.unescape(m_url_hash_name)}']")
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if section_header_title.empty?
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paras = raw.search("p") # default get all the paras
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else
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section_title_text = section_header_title.inner_text
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section_header = section_header_title[0].parent # parent element of the section span element should be an <h3> node
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cur_element = section_header
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# p|text|div covers the general case. We assume presence of at least 1 P node. if section has no P node we may end up with a P node from the next section.
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# div tag is commonly used as an assets wraper in an article section. often as the first element holding an image.
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# ul support will imporve the output generated for a section with a list as the main content (for example: an Author Bibliography, A musician Discography, etc)
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first_p_found = nil
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while (
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((next_sibling = cur_element.next_sibling).name =~ /p|text|div|ul/) ||
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first_p_found.nil?
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)
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# from section header get the next sibling until it is a breaker tag
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cur_element = next_sibling
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if (cur_element.name == "p" || cur_element.name == "ul") #we treat a list as we detect a p to avoid showing
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first_p_found = true
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paras.push(cur_element)
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end
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end
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end
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end
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unless paras.empty?
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cnt = 0
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while text.length < Onebox::LayoutSupport.max_text && cnt <= 3
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break if cnt >= paras.size
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text += " " unless cnt == 0
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if paras[cnt].name == "ul" # Handle UL tag. Generate a textual ordered list (1.item | 2.item | 3.item). Unfortunately no newline allowed in output
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li_index = 1
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list_items = []
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paras[cnt]
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.children
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.css("li")
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.each do |li|
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list_items.push "#{li_index}." + li.inner_text
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li_index += 1
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end
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paragraph = (list_items.join " |\n ")[0..Onebox::LayoutSupport.max_text]
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else
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paragraph = paras[cnt].inner_text[0..Onebox::LayoutSupport.max_text]
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end
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paragraph.gsub!(/\[\d+\]/mi, "")
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text += paragraph
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cnt += 1
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end
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end
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text = "#{text[0..Onebox::LayoutSupport.max_text]}..." if text.length >
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Onebox::LayoutSupport.max_text
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result = {
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link: link,
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title:
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raw.css("html body h1").inner_text +
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(section_title_text ? " | " + section_title_text : ""), #if a section sub title exists add it to the main article title
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description: text,
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}
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img = raw.css(".image img")
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if img && img.size > 0
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img.each do |i|
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src = i["src"]
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if src !~ /Question_book/
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result[:image] = src
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break
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end
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end
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end
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result
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end
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end
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end
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end
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