Extract Class Step Five

* Move another method
* Pass in controller state

Author: jferris

example_app/app/controllers/invitations_controller.rb

@@ -1,22 +1,14 @@
 class InvitationsController < ApplicationController
   def new
     @survey = Survey.find(params[:survey_id])
-    @survey_inviter = SurveyInviter.new('', '')
+    @survey_inviter = SurveyInviter.new
   end
 
   def create
     @survey = Survey.find(params[:survey_id])
-    @survey_inviter = SurveyInviter.new(message, recipients)
+    @survey_inviter = SurveyInviter.new(survey_inviter_attributes)
     if @survey_inviter.valid?
-      recipient_list.each do |email|
-        invitation = Invitation.create(
-          survey: @survey,
-          sender: current_user,
-          recipient_email: email,
-          status: 'pending'
-        )
-        Mailer.invitation_notification(invitation, message)
-      end
+      @survey_inviter.deliver
       redirect_to survey_path(@survey), notice: 'Invitation successfully sent'
     else
       @recipients = recipients
@@ -27,12 +19,8 @@ def create
 
   private
 
-  def invalid_recipients
-    @survey_inviter.invalid_recipients
-  end
-
-  def recipient_list
-    @survey_inviter.recipient_list
+  def survey_inviter_attributes
+    params[:invitation].merge(survey: @survey, sender: current_user)
   end
 
   def recipients

example_app/app/models/survey_inviter.rb

@@ -1,15 +1,29 @@
 class SurveyInviter
   EMAIL_REGEX = /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/
 
-  def initialize(message, recipients)
-    @message = message
-    @recipients = recipients
+  def initialize(attributes = {})
+    @survey = attributes[:survey]
+    @message = attributes[:message] || ''
+    @recipients = attributes[:recipients] || ''
+    @sender = attributes[:sender]
   end
 
   def valid?
     valid_message? && valid_recipients?
   end
 
+  def deliver
+    recipient_list.each do |email|
+      invitation = Invitation.create(
+        survey: @survey,
+        sender: @sender,
+        recipient_email: email,
+        status: 'pending'
+      )
+      Mailer.invitation_notification(invitation, @message)
+    end
+  end
+
   def invalid_recipients
     @invalid_recipients ||= recipient_list.map do |item|
       unless item.match(EMAIL_REGEX)
@@ -18,10 +32,6 @@ def invalid_recipients
     end.compact
   end
 
-  def recipient_list
-    @recipient_list ||= @recipients.gsub(/\s+/, '').split(/[\n,;]+/)
-  end
-
   private
 
   def valid_message?
@@ -31,4 +41,8 @@ def valid_message?
   def valid_recipients?
     invalid_recipients.empty?
   end
+
+  def recipient_list
+    @recipient_list ||= @recipients.gsub(/\s+/, '').split(/[\n,;]+/)
+  end
 end