Refactored generation of unique tags, URIs and object URLs into own classes,

as well as formatting of content

app/lib/formatter.rb

@@ -0,0 +1,47 @@
+require 'singleton'
+
+class Formatter
+  include Singleton
+
+  include ActionView::Helpers::TextHelper
+  include ActionView::Helpers::SanitizeHelper
+
+  def format(status)
+    return reformat(status) unless status.local?
+
+    html = status.text
+    html = encode(html)
+    html = link_urls(html)
+    html = link_mentions(html, status.mentions)
+
+    html.html_safe
+  end
+
+  def reformat(status)
+    sanitize(status.content, tags: %w(a br p), attributes: %w(href rel))
+  end
+
+  private
+
+  def encode(html)
+    HTMLEntities.new.encode(html)
+  end
+
+  def link_urls(html)
+    auto_link(html, link: :urls, html: { rel: 'nofollow noopener' })
+  end
+
+  def link_mentions(html, mentions)
+    html.gsub(Account::MENTION_RE) do |match|
+      acct    = Account::MENTION_RE.match(match)[1]
+      mention = mentions.find { |mention| mention.account.acct.eql?(acct) }
+
+      return match if mention.nil?
+      mention_html(match, mention.account)
+    end
+  end
+
+  def mention_html(match, account)
+    "#{match.split('@').first}<a href=\"#{TagManager.instance.url_for(account)}\" class=\"mention\">@<span>#{account.acct}</span></a>"
+  end
+end