184 lines
3.9 KiB
Ruby
184 lines
3.9 KiB
Ruby
module RichText
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SPAMMY_PHRASES = [
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"Business Description:", "Additional Keywords:"
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].freeze
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MAX_DESCRIPTION_LENGTH = 500
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def self.new(format, text)
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case format
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when "html" then HTML.new(text || "")
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when "markdown" then Markdown.new(text || "")
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when "text" then Text.new(text || "")
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end
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end
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class SimpleFormat
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include ActionView::Helpers::TextHelper
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include ActionView::Helpers::OutputSafetyHelper
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def sanitize(text, _options = {})
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Sanitize.clean(text, Sanitize::Config::OSM).html_safe
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end
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end
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class Base < String
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include ActionView::Helpers::TagHelper
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def spam_score
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link_count = 0
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link_size = 0
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doc = Nokogiri::HTML(to_html)
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if doc.content.empty?
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link_proportion = 0
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else
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doc.xpath("//a").each do |link|
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link_count += 1
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link_size += link.content.length
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end
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link_proportion = link_size.to_f / doc.content.length
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end
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spammy_phrases = SPAMMY_PHRASES.count do |phrase|
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doc.content.include?(phrase)
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end
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([link_proportion - 0.2, 0.0].max * 200) +
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(link_count * 40) +
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(spammy_phrases * 40)
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end
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def image
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nil
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end
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def image_alt
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nil
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end
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def description
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nil
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end
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protected
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def simple_format(text)
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SimpleFormat.new.simple_format(text)
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end
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def sanitize(text)
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Sanitize.clean(text, Sanitize::Config::OSM).html_safe
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end
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def linkify(text, mode = :urls)
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if text.html_safe?
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Rinku.auto_link(text, mode, tag_builder.tag_options(:rel => "nofollow noopener noreferrer")).html_safe
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else
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Rinku.auto_link(text, mode, tag_builder.tag_options(:rel => "nofollow noopener noreferrer"))
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end
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end
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end
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class HTML < Base
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def to_html
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linkify(sanitize(simple_format(self)))
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end
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def to_text
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to_s
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end
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end
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class Markdown < Base
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def to_html
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linkify(sanitize(document.to_html), :all)
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end
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def to_text
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to_s
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end
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def image
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@image_element = first_image_element(document.root) unless defined? @image_element
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@image_element.attr["src"] if @image_element
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end
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def image_alt
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@image_element = first_image_element(document.root) unless defined? @image_element
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@image_element.attr["alt"] if @image_element
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end
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def description
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return @description if defined? @description
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@description = first_truncated_text_content(document.root)
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end
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private
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def document
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@document ||= Kramdown::Document.new(self)
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end
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def first_image_element(element)
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return element if image?(element) && element.attr["src"].present?
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element.children.find do |child|
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nested_image = first_image_element(child)
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break nested_image if nested_image
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end
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end
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def first_truncated_text_content(element)
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if paragraph?(element)
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truncated_text_content(element)
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else
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element.children.find do |child|
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text = first_truncated_text_content(child)
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break text unless text.nil?
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end
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end
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end
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def truncated_text_content(element)
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text = ""
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append_text = lambda do |child|
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if child.type == :text
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text << child.value
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else
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child.children.each do |c|
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append_text.call(c)
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break if text.length > MAX_DESCRIPTION_LENGTH
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end
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end
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end
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append_text.call(element)
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return nil if text.blank?
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text.truncate(MAX_DESCRIPTION_LENGTH)
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end
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def image?(element)
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element.type == :img || (element.type == :html_element && element.value == "img")
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end
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def paragraph?(element)
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element.type == :p || (element.type == :html_element && element.value == "p")
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end
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end
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class Text < Base
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def to_html
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linkify(simple_format(ERB::Util.html_escape(self)))
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end
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def to_text
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to_s
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end
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end
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end
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