require 'singleton' class Formatter include Singleton include RoutingHelper include ActionView::Helpers::TextHelper include ActionView::Helpers::SanitizeHelper def format(status) return reformat(status.content) unless status.local? html = status.text html = encode(html) html = simple_format(html, sanitize: false) html = link_urls(html) html = link_mentions(html, status.mentions) html = link_hashtags(html) html.html_safe end def reformat(html) sanitize(html, tags: %w(a br p), attributes: %w(href rel)) end def simplified_format(account) return reformat(account.note) unless account.local? html = encode(account.note) html = link_urls(html) html.html_safe end private def encode(html) HTMLEntities.new.encode(html) end def link_urls(html) auto_link(html, link: :urls, html: { rel: 'nofollow noopener' }) do |text| truncate(text.gsub(/\Ahttps?:\/\/(www\.)?/, ''), length: 30) end end def link_mentions(html, mentions) html.gsub(Account::MENTION_RE) do |match| acct = Account::MENTION_RE.match(match)[1] mention = mentions.find { |item| item.account.acct.casecmp(acct).zero? } mention.nil? ? match : mention_html(match, mention.account) end end def link_hashtags(html) html.gsub(Tag::HASHTAG_RE) do |match| hashtag_html(match) end end def hashtag_html(match) prefix, affix = match.split('#') "#{prefix}##{affix}" end def mention_html(match, account) "#{match.split('@').first}@#{account.username}" end end