add tags to post file urls

app/presenters/post_presenter.rb

@@ -104,34 +104,7 @@ class PostPresenter < Presenter
   end
 
   def humanized_essential_tag_string
-    string = []
-
-    if @post.character_tags.any?
-      chartags = @post.character_tags.slice(0, 5)
-      if @post.character_tags.length > 5
-        chartags << "others"
-      end
-      chartags = chartags.map do |tag|
-        tag.match(/^(.+?)(?:_\(.+\))?$/)[1]
-      end
-      string << chartags.to_sentence
-    end
-
-    if @post.copyright_tags.any?
-      copytags = @post.copyright_tags.slice(0, 5)
-      if @post.copyright_tags.length > 5
-        copytags << "others"
-      end
-      copytags = copytags.to_sentence
-      string << (@post.character_tags.any? ? "(#{copytags})" : copytags)
-    end
-
-    if @post.artist_tags_excluding_hidden.any?
-      string << "drawn by"
-      string << @post.artist_tags_excluding_hidden.to_sentence
-    end
-
-    string.empty? ? "##{@post.id}" : string.join(" ").tr("_", " ")
+    @post.humanized_essential_tag_string
   end
 
   def categorized_tag_string