Extract Class Step Three

* Move another method
* This method requires moving a constant
* Also requires changing the view to reference to the new class

Author: jferris

example_app/app/controllers/invitations_controller.rb

@@ -1,8 +1,7 @@
 class InvitationsController < ApplicationController
-  EMAIL_REGEX = /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/
-
   def new
     @survey = Survey.find(params[:survey_id])
+    @survey_inviter = SurveyInviter.new('')
   end
 
   def create
@@ -37,11 +36,7 @@ def valid_message?
   end
 
   def invalid_recipients
-    @invalid_recipients ||= recipient_list.map do |item|
-      unless item.match(EMAIL_REGEX)
-        item
-      end
-    end.compact
+    @survey_inviter.invalid_recipients
   end
 
   def recipient_list

example_app/app/models/survey_inviter.rb

@@ -1,8 +1,18 @@
 class SurveyInviter
+  EMAIL_REGEX = /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/
+
   def initialize(recipients)
     @recipients = recipients
   end
 
+  def invalid_recipients
+    @invalid_recipients ||= recipient_list.map do |item|
+      unless item.match(EMAIL_REGEX)
+        item
+      end
+    end.compact
+  end
+
   def recipient_list
     @recipient_list ||= @recipients.gsub(/\s+/, '').split(/[\n,;]+/)
   end

example_app/app/views/invitations/new.html.erb

@@ -4,10 +4,10 @@
     <div class="error">Please provide a message</div>
   <% end %>
   <%= f.input :recipients, as: :text, input_html: { value: @recipients } %>
-  <% if @invalid_recipients %>
+  <% if @survey_inviter.invalid_recipients %>
     <div class="error">
       Invalid email addresses: 
-      <%= @invalid_recipients.join(', ') %>
+      <%= @survey_inviter.invalid_recipients.join(', ') %>
     </div>
   <% end %>
   <%= f.button :submit, value: 'Invite' %>