refa: extract markdown helper into module

Author: salzig

app/helpers/application_helper.rb

@@ -70,13 +70,6 @@ def icon(type)
     tag.link rel: type, href: path
   end
 
-  def markdown(content)
-    return nil unless content
-
-    content = markdown_parser.render(content).html_safe
-    tag.div(content, class: :markdown)
-  end
-
   def fa_icon_map
     @fa_icon_map ||= ActiveSupport::HashWithIndifferentAccess.new { |_hash, key| key }.merge(
       'events' => 'calendar',
@@ -124,12 +117,4 @@ def asset_file_exists?(logical_path)
       Rails.root.join('public/images', logical_path)
     ].any?(&:exist?)
   end
-
-  def markdown_parser
-    @markdown_parser ||= Redcarpet::Markdown.new markdown_renderer, autolink: true, space_after_headers: true
-  end
-
-  def markdown_renderer
-    @markdown_renderer ||= Redcarpet::Render::Safe.new(no_styles: true, filter_html: true, link_attributes: { rel: 'nofollow noopener noreferrer ugc' })
-  end
 end

app/helpers/markdown_helper.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module MarkdownHelper
+  def markdown(content)
+    return nil unless content
+
+    content = markdown_parser.render(content).html_safe # rubocop:disable Rails/OutputSafety
+    tag.div(content, class: :markdown)
+  end
+
+  private
+
+  def markdown_parser
+    @markdown_parser ||= Redcarpet::Markdown.new markdown_renderer, autolink: true, space_after_headers: true
+  end
+
+  def markdown_renderer
+    @markdown_renderer ||= Redcarpet::Render::Safe.new(no_styles: true, filter_html: true, link_attributes: { rel: 'nofollow noopener noreferrer ugc' })
+  end
+end