113 lines
2.4 KiB
Ruby
113 lines
2.4 KiB
Ruby
module RichText
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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)
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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.length > 0
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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.to_f
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else
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link_proportion = 0
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end
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[link_proportion - 0.2, 0.0].max * 200 + link_count * 40
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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 linkify(text)
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if text.html_safe?
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Rinku.auto_link(text, :urls, tag_options(:rel => "nofollow")).html_safe
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else
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Rinku.auto_link(text, :urls, tag_options(:rel => "nofollow"))
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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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private
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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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end
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class Markdown < Base
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def to_html
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html_parser.render(self).html_safe
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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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private
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def html_parser
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@@html_renderer ||= Renderer.new(:filter_html => true, :safe_links_only => true)
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@@html_parser ||= Redcarpet::Markdown.new(@@html_renderer, :no_intra_emphasis => true, :autolink => true, :space_after_headers => true)
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end
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class Renderer < Redcarpet::Render::XHTML
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def link(link, _title, alt_text)
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"<a rel=\"nofollow\" href=\"#{link}\">#{alt_text}</a>"
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end
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def autolink(link, link_type)
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if link_type == :email
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"<a rel=\"nofollow\" href=\"mailto:#{link}\">#{link}</a>"
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else
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"<a rel=\"nofollow\" href=\"#{link}\">#{link}</a>"
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end
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end
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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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