Add comment notifications and ability to toggle them as a pref

Gemfile

@@ -25,6 +25,7 @@ gem 'newrelic_rpm'
 gem 'newrelic-faraday'
 gem 'airbrake'
 gem 'kanshi', :require => false
+gem 'pony'
 
 gem 'jquery-rails'
 gem 'haml-rails'

Gemfile.lock

@@ -117,6 +117,8 @@ GEM
     pjax_rails (0.3.3)
       jquery-rails
     polyglot (0.3.3)
+    pony (1.4)
+      mail (> 2.0)
     queue_classic (2.0.1)
       pg (~> 0.14.0)
       scrolls (~> 0.2.1)
@@ -201,6 +203,7 @@ DEPENDENCIES
   omniauth-github
   pg
   pjax_rails
+  pony
   queue_classic
   rack-worker
   rails (= 3.2.8)

app/assets/stylesheets/site.sass

@@ -8,6 +8,11 @@
     color: #ccc
     font-size: 12px
 
+  .notifications
+    margin-right: 15px
+    color: #ccc
+    font-size: 12px
+
 #footer
   position: absolute
   bottom: 0px

app/controllers/users_controller.rb

@@ -0,0 +1,9 @@
+class UsersController < ApplicationController
+
+  before_filter :force_user_login
+
+  def toggle_notifications
+    current_user.toggle_notifications
+    redirect_to :back
+  end
+end

app/models/comment_notifier.rb

@@ -5,7 +5,19 @@ class << self
     def gist_commented(gist_id)
       gist = Gist.find(gist_id)
       user = gist.user
-      # Mail!
+      if(user.notify_comments?)
+        log({ns: self, fn: __method__, measure: true, at: 'sending-notification'}, gist, user)
+        Pony.mail(:to => user.gh_email, :subject => "\"#{gist.description}\" has a new comment", :body => <<-EOS)
+The extremely unsophisticated comment-detection algorithm at Gisted would like to let you know that you have a new comment on your "#{gist.description}" gist.
+
+View your gist's comments at #{gist.url}#comments
+
+---
+-Gisted (https://gistedapp.herokuapp.com/)
+
+If this email offends your delicate sensibilities, you can opt out by clikcing the "turn off comment notifications" link on the Gisted interface: https://gistedapp.herokuapp.com/ or by complaining directly to @rwdaigle.
+        EOS
+      end
     end
   end
 end

app/models/gist.rb

@@ -161,6 +161,7 @@ def indexed_attributes
 
   def check_for_new_comments
     if(comment_count_changed?)
+      log({ns: self, fn: __method__, measure: true, at: 'comment-count-changed'}, self, user)
       QC.enqueue("CommentNotifier.gist_commented", id) if comment_count.to_i > comment_count_was.to_i
     end
   end

app/models/user.rb

@@ -42,6 +42,11 @@ def refresh_index(user_id, all = false)
     end
   end
 
+  def toggle_notifications
+    log({ns: self.class, fn: __method__, measure: true, to: !notify_comments}, self)
+    update_attribute(:notify_comments, !notify_comments)
+  end
+
   def indexed!
     update_attribute(:last_indexed_at, Time.now)
   end

app/views/layouts/application.html.haml

@@ -27,6 +27,11 @@
     #profile
       - if user_logged_in?
         %span.last-edited= "Last known gist activity on #{current_user.last_gist_updated_at ? current_user.last_gist_updated_at.to_formatted_s(:short) : 'never'}"
+        %span.notifications
+          - if(current_user.notify_comments?)
+            = link_to("turn off comment notifications", toggle_notifications_users_path, :method => :post)
+          - else
+            = link_to("notify me of gist comments", toggle_notifications_users_path, :method => :post)
         %span.logout= link_to("logout", logout_path) 
     #header
       .container

config/initializers/pony.rb

@@ -0,0 +1,12 @@
+Pony.options = {
+  :from => 'notifications@gistedapp.herokuapp.com',
+  :via => :smtp,
+  :via_options => {
+    :address        => ENV['MAILGUN_SMTP_SERVER'],
+    :port           => ENV['MAILGUN_SMTP_PORT'],
+    :user_name      => ENV['MAILGUN_SMTP_LOGIN'],
+    :password       => ENV['MAILGUN_SMTP_PASSWORD'],
+    :authentication => :plain,
+    :domain         => ENV['HOST']
+  }
+}

config/routes.rb

@@ -14,6 +14,12 @@
   # Though this was an option at one time?
   all = [:index, :show, :new, :create, :edit, :update, :destroy]
 
+  resources :users, :except => all do
+    collection do
+      post 'toggle_notifications'
+    end
+  end
+
   resources :gists, :except => all do
     collection do
       post 'refresh'

db/migrate/20121206183232_add_comment_preference.rb

@@ -0,0 +1,12 @@
+class AddCommentPreference < ActiveRecord::Migration
+
+  def up
+    change_table :users do |t|
+      t.boolean :notify_comments, :default => false
+    end
+  end
+
+  def down
+    remove_column :users, :notify_comments
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20121125001827) do
+ActiveRecord::Schema.define(:version => 20121206183232) do
 
   create_table "gist_files", :force => true do |t|
     t.integer  "gist_id"
@@ -72,6 +72,7 @@
     t.datetime "updated_at",                        :null => false
     t.boolean  "gh_auth_active",  :default => true
     t.datetime "last_indexed_at"
+    t.boolean  "notify_comments", :default => true
   end
 
   add_index "users", ["gh_id"], :name => "index_users_on_gh_id"