added popular exploration, added order:rank

app/presenters/post_set_presenters/base.rb

@@ -0,0 +1,21 @@
+module PostSetPresenters
+  class Base
+    def posts
+      raise NotImplementedError
+    end
+    
+    def post_previews_html(template)
+      html = ""
+
+      if posts.empty?
+        return template.render(:partial => "post_sets/blank")
+      end
+
+      posts.each do |post|
+        html << PostPresenter.preview(post)
+      end
+
+      html.html_safe
+    end
+  end
+end

app/presenters/post_set_presenters/favorite.rb

@@ -1,7 +1,7 @@
 module PostSetPresenters
-  class Favorite
+  class Favorite < Base
     attr_accessor :favorite_set, :tag_set_presenter
-    delegate :favorites, :posts, :to => :favorite_set
+    delegate :favorites, :to => :favorite_set
 
     def initialize(favorite_set)
       @favorite_set = favorite_set
@@ -15,19 +15,9 @@ module PostSetPresenters
     def tag_list_html(template)
       tag_set_presenter.tag_list_html(template)
     end
-
-    def post_previews_html(template)
-      html = ""
-
-      if favorites.empty?
-        return template.render(:partial => "post_sets/blank")
-      end
-
-      favorites.each do |favorite|
-        html << PostPresenter.preview(favorite.post)
-      end
-
-      html.html_safe
+    
+    def posts
+      favorites.map(&:post)
     end
   end
 end

app/presenters/post_set_presenters/pool.rb

@@ -1,12 +1,13 @@
 module PostSetPresenters
-  class Pool
-    attr_reader :tag_set_presenter, :pool_set
+  class Pool < Base
+    attr_reader :tag_set_presenter, :post_set
+    delegate :posts, :to => :post_set
 
-    def initialize(pool_set)
-      @pool_set = pool_set
+    def initialize(post_set)
+      @post_set = post_set
       @tag_set_presenter = TagSetPresenter.new(
         RelatedTagCalculator.calculate_from_sample_to_array(
-          pool_set.tag_string
+          post_set.tag_string
         ).map {|x| x[0]}
       )
     end
@@ -14,19 +15,5 @@ module PostSetPresenters
     def tag_list_html(template)
       tag_set_presenter.tag_list_html(template)
     end
-
-    def post_previews_html(template)
-      html = ""
-
-      if pool_set.posts.empty?
-        return template.render(:partial => "post_sets/blank")
-      end
-
-      pool_set.posts.each do |post|
-        html << PostPresenter.preview(post)
-      end
-
-      html.html_safe
-    end
   end
 end

app/presenters/post_set_presenters/popular.rb

@@ -0,0 +1,34 @@
+module PostSetPresenters
+  class Popular < Base
+    attr_accessor :post_set, :tag_set_presenter
+    delegate :posts, :date, :to => :post_set
+    
+    def initialize(post_set)
+      @post_set = post_set
+    end
+
+    def prev_day
+      date - 1
+    end
+    
+    def next_day
+      date + 1
+    end
+    
+    def prev_week
+      date - 7
+    end
+    
+    def next_week
+      date + 7
+    end
+    
+    def prev_month
+      1.month.ago(date)
+    end
+    
+    def next_month
+      1.month.since(date)
+    end
+  end
+end

app/presenters/post_set_presenters/post.rb

@@ -1,6 +1,7 @@
 module PostSetPresenters
-  class Post
+  class Post < Base
     attr_accessor :post_set, :tag_set_presenter
+    delegate :posts, :to => :post_set
 
     def initialize(post_set)
       @post_set = post_set
@@ -18,26 +19,8 @@ module PostSetPresenters
       RelatedTagCalculator.calculate_from_sample_to_array(post_set.tag_string).map(&:first)
     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 = ""
-
-      if posts.empty?
-        return template.render(:partial => "post_sets/blank")
-      end
-
-      posts.each do |post|
-        html << PostPresenter.preview(post)
-      end
-
-      html.html_safe
-    end
   end
 end