Made notification emails get encrypted for accounts with a public key.

Gemfile

@@ -16,6 +16,7 @@ gem 'highlight_js-rails', github: 'RedstonerServer/highlight_js-rails'
 gem 'kaminari', github: 'jomo/kaminari', branch: 'patch-2' # pagination
 gem 'jquery-textcomplete-rails', github: 'RedstonerServer/jquery-textcomplete-rails' # @mentions
 gem 'actionpack-action_caching', github: 'antulik/actionpack-action_caching', ref: '8c6e52c69315d67437f480da5dce4b7c8737fb32'
+gem 'mail-gpg'
 
 # Gems used only for assets and not required
 # in production environments by default.

app/mailers/redstoner_mailer.rb

@@ -19,29 +19,49 @@ class RedstonerMailer < ActionMailer::Base
   def new_thread_mention_mail(user, thread)
     @user   = user
     @thread = thread
-    mail(to: @user.email, subject: "#{thread.author.name} mentioned you in '#{thread.title}' on Redstoner")
+    if @user.public_key?
+      mail(to: @user.email, subject: "Encrypted Notification from Redstoner", gpg: {encrypt: true, keys: {@user.email => @user.public_key}})
+    else
+      mail(to: @user.email, subject: "#{thread.author.name} mentioned you in '#{thread.title}' on Redstoner")
+    end
   end
 
   def new_thread_reply_mail(user, reply)
     @user  = user
     @reply = reply
-    mail(to: @user.email, subject: "#{reply.author.name} replied to '#{reply.thread.title}' on Redstoner")
+    if @user.public_key?
+      mail(to: @user.email, subject: "Encrypted Notification from Redstoner", gpg: {encrypt: true, keys: {@user.email => @user.public_key}})
+    else
+      mail(to: @user.email, subject: "#{reply.author.name} replied to '#{reply.thread.title}' on Redstoner")
+    end
   end
 
   def new_post_mention_mail(user, post)
     @user = user
     @post = post
-    mail(to: @user.email, subject: "#{post.author.name} mentioned you in '#{post.title}' on Redstoner")
+    if @user.public_key?
+      mail(to: @user.email, subject: "Encrypted Notification from Redstoner", gpg: {encrypt: true, keys: {@user.email => @user.public_key}})
+    else
+      mail(to: @user.email, subject: "#{post.author.name} mentioned you in '#{post.title}' on Redstoner")
+    end
   end
 
   def new_post_comment_mail(user, comment)
     @user    = user
     @comment = comment
-    mail(to: @user.email, subject: "#{comment.author.name} replied to '#{comment.blogpost.title}' on Redstoner")
+    if @user.public_key?
+      mail(to: @user.email, subject: "Encrypted Notification from Redstoner", gpg: {encrypt: true, keys: {@user.email => @user.public_key}})
+    else
+      mail(to: @user.email, subject: "#{comment.author.name} replied to '#{comment.blogpost.title}' on Redstoner")
+    end
   end
 
   def email_change_confirm_mail(user)
     @user = user
-    mail(to: @user.email, subject: "Email change on Redstoner.com")
+    if @user.public_key?
+      mail(to: @user.email, subject: "Encrypted Notification from Redstoner", gpg: {encrypt: true, keys: {@user.email => @user.public_key}})
+    else
+      mail(to: @user.email, subject: "Email change on Redstoner.com")
+    end
   end
 end