Auto refresh feature on public scoreboards

#12
#13

app/controllers/contests_controller.rb

@@ -123,20 +123,19 @@ class ContestsController < ApplicationController
 
     @title = I18n.t("contests.scoreboard.title", name: @contest.name)
     @contestants = ranked_contestants(@contest)
-    filter_contestants_per_category
+    if params.key?(:category)
+      @category = params[:category]
+      filter_contestants_per_category
+    end
     if params.key?(:hide_offline) && params[:hide_offline] == "true"
       @contestants = @contestants.select { |contestant| !contestant.offline.present? }
+      @hide_offline = true
+    end
+    if params.key?(:autorefresh)
+      @autorefresh = true
     end
     @puzzles = @contest.puzzles.where(hidden: false).or(@contest.puzzles.where(hidden: nil)).order(:id)
-    if params.key?(:hide_offline) && params.key?(:category)
-      @action_path = "/public/#{@contest.friendly_id}?hide_offline=#{params[:hide_offline]}&category=#{params[:category]}"
-    elsif params.key?(:category)
-      @action_path = "/public/#{@contest.friendly_id}?category=#{params[:category]}"
-    elsif params.key?(:hide_offline)
-      @action_path = "/public/#{@contest.friendly_id}?hide_offline=#{params[:hide_offline]}"
-    else
-      @action_path = "/public/#{@contest.friendly_id}"
-    end
+    @action_path = "/public/#{@contest.friendly_id}"
     @space = " "
     render :scoreboard
   end
@@ -254,11 +253,11 @@ class ContestsController < ApplicationController
   end
 
   def filter_contestants_per_category
-    if params.key?(:category) && params[:category] != "-1"
-      if params[:category] == "-2"
+    if @category != "-1"
+      if @category == "-2"
         @contestants = @contestants.select { |contestant| contestant.categories.size == 0 }
       else
-        @contestants = @contestants.select { |contestant| contestant.categories.where(id: params[:category]).any? }
+        @contestants = @contestants.select { |contestant| contestant.categories.where(id: @category).any? }
       end
     end
   end