work in detected timezone

Gemfile

@@ -34,7 +34,7 @@ gem 'seedbank', '~> 0.1.3'
 gem 'rails_admin', '~> 0.4.5'
 gem 'rails-settings-cached', '~> 0.2.2'
 gem 'unicorn', '~> 4.5.0'
-gem "audited-activerecord", '~> 3.0'
+gem 'audited-activerecord', '~> 3.0'
 
 # Gems used only for assets and not required
 # in production environments by default.
@@ -44,8 +44,13 @@ group :assets do
   gem 'bootstrap-sass', '~> 2.2.0'
   gem 'font-awesome-sass-rails', '~> 3.0.0'
   gem 'webshims-rails', '~> 0.4.7'
+  gem 'detect_timezone_rails', '~> 0.0.3'
+  gem 'jquery-cookie-rails', '~> 1.2.0',
+    git: 'git://github.com/RyanScottLewis/jquery-cookie-rails.git'
   gem 'coffee-rails', "~> 3.2.1"
   gem 'uglifier', '>= 1.0.3'
+  gem 'oily_png', '1.0.2'
+  gem 'turbo-sprockets-rails3', '0.3.6'
   gem 'therubyracer'
 end
 
@@ -62,6 +67,9 @@ group :development do
   gem 'capistrano-ext', '~> 1.2.1'
   gem 'mongrel', '>= 1.2.0.pre2'
   gem 'quiet_assets', '~> 1.0.1'
+  gem 'meta_request', '0.2.1'
+  gem 'parallel_tests', '0.10.0'
+  gem 'progress_bar', require: false
 end
 
 group :test, :development do

Gemfile.lock

@@ -1,3 +1,12 @@
+GIT
+  remote: git://github.com/RyanScottLewis/jquery-cookie-rails.git
+  revision: f35da80d8ff720f7164924cc40abd2688f834ca6
+  specs:
+    jquery-cookie-rails (1.2.0)
+      jquery-rails (~> 2.0)
+      railties (>= 3.2.0, < 5.0)
+      thor (~> 0.14)
+
 GIT
   remote: https://github.com/KimNorgaard/validates_hostname.git
   revision: 6421e9bd8261a2fe010c627191a0dbe30352469f
@@ -101,6 +110,8 @@ GEM
     daemons (1.0.10)
     dalli (2.6.2)
     database_cleaner (0.7.2)
+    detect_timezone_rails (0.0.3)
+      railties (~> 3.1)
     devise (2.1.3)
       bcrypt-ruby (~> 3.0)
       orm_adapter (~> 0.1)
@@ -118,6 +129,7 @@ GEM
       railties (>= 3.0.0)
     faker (1.0.1)
       i18n (~> 0.4)
+    fattr (2.2.1)
     ffi (1.0.11)
     file-tail (1.0.12)
       tins (~> 0.5)
@@ -164,6 +176,9 @@ GEM
       mime-types (~> 1.16)
       treetop (~> 1.4.8)
     mail_form (1.3.0)
+    meta_request (0.2.1)
+      rack-contrib
+      rails
     method_source (0.8.1)
     mime-types (1.21)
     mongrel (1.2.0.pre2)
@@ -183,10 +198,20 @@ GEM
       activerecord (>= 3.0.0)
       activesupport (>= 3.0.0)
     nokogiri (1.5.6)
+    oily_png (1.0.2)
+      chunky_png (~> 1.2.1)
+    options (2.3.0)
+      fattr
     orm_adapter (0.4.0)
+    parallel (0.6.2)
+    parallel_tests (0.10.0)
+      parallel
     polyamorous (0.5.0)
       activerecord (~> 3.0)
     polyglot (0.3.3)
+    progress_bar (0.4.0)
+      highline (~> 1.6.1)
+      options (~> 2.3.0)
     pry (0.9.12)
       coderay (~> 1.0.5)
       method_source (~> 0.8)
@@ -196,6 +221,8 @@ GEM
     rack (1.4.5)
     rack-cache (1.2)
       rack (>= 0.4)
+    rack-contrib (1.1.0)
+      rack (>= 0.9.1)
     rack-pjax (0.7.0)
       nokogiri (~> 1.5)
       rack (~> 1.3)
@@ -317,6 +344,9 @@ GEM
     treetop (1.4.12)
       polyglot
       polyglot (>= 0.3.1)
+    turbo-sprockets-rails3 (0.3.6)
+      railties (> 3.2.8, < 4.0.0)
+      sprockets (>= 2.0.0)
     turbolinks (1.0.0)
       coffee-rails
     tzinfo (0.3.36)
@@ -353,19 +383,25 @@ DEPENDENCIES
   concerned_with (~> 0.1.0)
   dalli (~> 2.6.2)
   database_cleaner (~> 0.7.1)
+  detect_timezone_rails (~> 0.0.3)
   devise (~> 2.1.0)
   factory_girl_rails (~> 1.6.0)
   faker (~> 1.0.1)
   font-awesome-sass-rails (~> 3.0.0)
   guard-rspec (~> 0.6.0)
   guard-spork (~> 0.5.1)
+  jquery-cookie-rails (~> 1.2.0)!
   jquery-rails (~> 2.1.3)
   libnotify (~> 0.7.2)
   mail_form (~> 1.3.0)
+  meta_request (= 0.2.1)
   mongrel (>= 1.2.0.pre2)
   mysql2
   navigasmic (~> 0.5.6)!
   nilify_blanks (~> 1.0.0)
+  oily_png (= 1.0.2)
+  parallel_tests (= 0.10.0)
+  progress_bar
   quiet_assets (~> 1.0.1)
   rails (= 3.2.12)
   rails-backbone (~> 0.7.0)
@@ -384,6 +420,7 @@ DEPENDENCIES
   squeel (~> 1.0.0)
   switch_user (~> 0.6.0)
   therubyracer
+  turbo-sprockets-rails3 (= 0.3.6)
   turbolinks (~> 1.0.0)
   uglifier (>= 1.0.3)
   unicorn (~> 4.5.0)

app/assets/javascripts/application.js.coffee

@@ -11,5 +11,8 @@
 #= require slides
 #= require bootstrap
 #= require active_scaffold
+#= require jquery.cookie
+#= require detect_timezone
+#= require jquery.detect_timezone
 #= require_tree ./components
 #= require_self

app/assets/javascripts/components/config.js.coffee.erb

@@ -0,0 +1,4 @@
+$.cookie('time_zone',
+  $.fn.get_timezone('default': '<%= Rails.configuration.time_zone %>'),
+  { path: '/' }
+)

app/controllers/application_controller.rb

@@ -1,6 +1,7 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery
   before_filter :check_honeypot
+  around_filter :set_timezone
   helper_method :client_remote_ip
   layout :scoped_layout
   
@@ -11,6 +12,18 @@ class ApplicationController < ActionController::Base
   
   protected
   
+  def set_timezone
+    old_time_zone = Time.zone
+    if user_signed_in? && current_user.timezone.present?
+      Time.zone = current_user.timezone
+    elsif cookies[:time_zone].present?
+      Time.zone = cookies[:time_zone]
+    end
+    yield
+  ensure
+    Time.zone = old_time_zone
+  end
+  
   def scoped_layout
     return false if request.xhr?
     return 'admin' if devise_controller? && resource_name == :admin