explore/posts/popular: refactor post previews.

app/controllers/explore/posts_controller.rb

@@ -4,8 +4,12 @@ module Explore
     before_action :set_date, only: [:searches, :viewed]
 
     def popular
-      @post_set = PostSets::Popular.new(params[:date], params[:scale])
-      @posts = @post_set.posts
+      @date = params[:date] ? Date.parse(params[:date]) : Date.today
+      @scale = params[:scale]
+      @scale = "day" unless @scale.in?(["day", "week", "month"])
+
+      limit = params.fetch(:limit, CurrentUser.user.per_page)
+      @posts = popular_posts(@date, @scale).paginate(params[:page], limit: limit)
       respond_with(@posts)
     end
 
@@ -32,5 +36,16 @@ module Explore
     def set_date
       @date = params[:date] ? Date.parse(params[:date]) : Date.today
     end
+
+    def popular_posts(date, scale)
+      if scale == "day"
+        Post.tag_match("date:#{date} order:score")
+      else
+        min_date = date.send("beginning_of_#{scale}").to_date.to_s
+        max_date = date.send("end_of_#{scale}").to_date.to_s
+        search = "date:#{min_date}..#{max_date} order:score"
+        Post.tag_match(search)
+      end
+    end
   end
 end