move explore links to sidebar, fix popular searches action

app/controllers/explore/posts_controller.rb

@@ -1,6 +1,7 @@
 module Explore
   class PostsController < ApplicationController
     respond_to :html, :xml, :json
+    before_filter :set_date, only: [:searches, :viewed]
 
     def popular
       @post_set = PostSets::Popular.new(params[:date], params[:scale])
@@ -9,13 +10,12 @@ module Explore
     end
 
     def viewed
-      @post_set = PostSets::MostViewed.new(params[:date])
+      @post_set = PostSets::MostViewed.new(@date.to_s)
       @posts = @post_set.posts
       respond_with(@posts)
     end
 
     def searches
-      @date = params[:date] ? Date.parse(params[:date]) : Date.today
       @search_service = PopularSearchService.new(@date)
     end
 
@@ -27,5 +27,10 @@ module Explore
       @presenter = IntroPresenter.new
       render :layout => "blank"
     end
+
+  private
+    def set_date
+      @date = params[:date] ? Date.parse(params[:date]) : Date.today
+    end
   end
 end