add most viewed posts page

app/logical/post_sets/most_viewed.rb

@@ -0,0 +1,17 @@
+module PostSets
+  class MostViewed < PostSets::Base
+    attr_reader :date
+
+    def initialize(date)
+      @date = date.blank? ? Time.zone.now : Time.zone.parse(date)
+    end
+
+    def posts
+      @posts ||= PostViewCountService.new.popular_posts(date)
+    end
+
+    def presenter
+      ::PostSetPresenters::MostViewed.new(self)
+    end
+  end
+end