tag set presenter

app/presenters/post_set_presenter.rb

@@ -1,32 +0,0 @@
-class PostSetPresenter < Presenter
-  attr_accessor :post_set, :tag_set_presenter
-  
-  def initialize(post_set)
-    @post_set = post_set
-    @tag_set_presenter = TagSetPresenter.new(RelatedTagCalculator.calculate_from_sample_to_array(@post_set.tag_string).map {|x| x[0]})
-  end
-  
-  def posts
-    post_set.posts
-  end
-  
-  def tag_list_html(template)
-    tag_set_presenter.tag_list_html(template)
-  end
-  
-  def post_previews_html(template)
-    html = "<div class='post-previews'>"
-    
-    if posts.empty?
-      return template.render("post_sets/blank")
-    end
-    
-    posts.each do |post|
-      html << PostPresenter.preview(post)
-    end
-    
-    html << '</div>'
-    
-    html.html_safe
-  end
-end

app/presenters/post_set_presenters/post.rb

@@ -10,14 +10,38 @@ module PostSetPresenters
     
     def related_tags
       if post_set.is_single_tag?
-        tag = Tag.find_by_name(post_set.tag_string)
-        if tag
-          return tag.related_tag_array.map(&:first)
-        end
+        related_tags_for_single
+      elsif post_set.is_empty_tag?
+        popular_tags
+      else
+        related_tags_for_group
+      end
+    end
+    
+    def popular_tags
+      n = 1
+      results = []
+      
+      while results.empty? && n < 256
+        query = n.days.ago.strftime("date:>%Y-%m-%d")
+        results = RelatedTagCalculator.calculate_from_sample_to_array(query).map(&:first)
+        n *= 2
       end
       
+      results
+    end
+    
+    def related_tags_for_group
       RelatedTagCalculator.calculate_from_sample_to_array(post_set.tag_string).map(&:first)
     end
+    
+    def related_tags_for_single
+      tag = Tag.find_by_name(post_set.tag_string)
+
+      if tag
+        return tag.related_tag_array.map(&:first)
+      end
+    end
 
     def tag_list_html(template)
       tag_set_presenter.tag_list_html(template)

app/presenters/tag_set_presenter.rb

@@ -12,7 +12,7 @@ class TagSetPresenter < Presenter
   def tag_list_html(template, options = {})
     html = ""
     html << "<ul>"
-    @tags.flatten.each do |tag|
+    @tags.each do |tag|
       html << build_list_item(tag, template, options)
     end
     html << "</ul>"