Randomize the talks

app/controllers/application_controller.rb

@@ -9,4 +9,12 @@ class ApplicationController < ActionController::Base
     # request.env['HTTP_X_FORWARDED_FOR'] ||
     request.remote_ip
   end
+
+  def sort_seed
+    if session[:random_sort_seed].present?
+      session[:random_sort_seed].to_i
+    else
+      session[:random_sort_seed] = Random.new_seed
+    end
+  end
 end

app/controllers/talk_preferences_controller.rb

@@ -1,6 +1,6 @@
 class TalkPreferencesController < ApplicationController
   def index
-    @talks = Talk.all(params: {locale: I18n.locale})
+    @talks = Talk.all(params: {locale: I18n.locale}).to_a.shuffle(random: Random.new(sort_seed))
   end
 
   def show