120 lines
3.1 KiB
Ruby
120 lines
3.1 KiB
Ruby
class PostAnalyzer
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def initialize(raw, topic_id)
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@raw = raw
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@topic_id = topic_id
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end
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# What we use to cook posts
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def cook(*args)
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cooked = PrettyText.cook(*args)
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# cook all oneboxes, in the past we used to defer this
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# for some reason we decided to do this inline now
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# TODO: discuss on http://meta.discourse.org what the correct thing is to do
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# keep in mind some oneboxes may take a long time to build
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result = Oneboxer.apply(cooked) do |url, elem|
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Oneboxer.invalidate(url) if args.last[:invalidate_oneboxes]
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begin
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Oneboxer.onebox url
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rescue => e
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Rails.logger.warn("Failed to cook onebox: #{e.message} #{e.backtrace}")
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nil
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end
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end
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cooked = result.to_html if result.changed?
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cooked
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end
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# How many images are present in the post
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def image_count
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return 0 unless @raw.present?
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cooked_document.search("img").reject do |t|
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dom_class = t["class"]
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if dom_class
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(Post.white_listed_image_classes & dom_class.split(" ")).count > 0
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end
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end.count
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end
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# How many attachments are present in the post
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def attachment_count
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return 0 unless @raw.present?
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attachments = cooked_document.css("a.attachment[href^=\"#{Discourse.store.absolute_base_url}\"]")
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attachments += cooked_document.css("a.attachment[href^=\"#{Discourse.store.relative_base_url}\"]") if Discourse.store.internal?
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attachments.count
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end
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def raw_mentions
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return [] if @raw.blank?
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return @raw_mentions if @raw_mentions.present?
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# strip quotes and code blocks
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cooked_stripped = cooked_document
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cooked_stripped.search("aside.quote").remove
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cooked_stripped.search("pre").remove
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cooked_stripped.search("code").remove
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results = cooked_stripped.to_html.scan(PrettyText.mention_matcher)
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@raw_mentions = results.uniq.map { |un| un.first.downcase.gsub!(/^@/, '') }
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end
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# Count how many hosts are linked in the post
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def linked_hosts
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return {} if raw_links.blank?
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return @linked_hosts if @linked_hosts.present?
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@linked_hosts = {}
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raw_links.each do |u|
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begin
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uri = URI.parse(u)
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host = uri.host
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@linked_hosts[host] ||= 1
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rescue URI::InvalidURIError
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# An invalid URI does not count as a raw link.
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next
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end
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end
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@linked_hosts
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end
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# Returns an array of all links in a post excluding mentions
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def raw_links
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return [] unless @raw.present?
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return @raw_links if @raw_links.present?
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# Don't include @mentions in the link count
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@raw_links = []
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cooked_document.search("a").each do |l|
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next if l.attributes['href'].nil? || link_is_a_mention?(l)
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url = l.attributes['href'].to_s
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@raw_links << url
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end
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@raw_links
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end
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# How many links are present in the post
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def link_count
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raw_links.size
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end
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private
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def cooked_document
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@cooked_document ||= Nokogiri::HTML.fragment(cook(@raw, topic_id: @topic_id))
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end
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def link_is_a_mention?(l)
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html_class = l.attributes['class']
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return false if html_class.nil?
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html_class.to_s == 'mention' && l.attributes['href'].to_s =~ /^\/users\//
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end
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end
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