Corrects the logic dealing with confirmations of users via oauth

app/controllers/users/registrations_controller.rb

@@ -30,10 +30,16 @@ class Users::RegistrationsController < Devise::RegistrationsController
 
   def do_finish_signup
     current_user.registering_with_oauth = false
-    current_user.validate
-    should_send_confirmation = current_user.errors.include? :email
     if current_user.update(sign_up_params)
-      current_user.send_confirmation_instructions if should_send_confirmation
+
+      if current_user.confirmed_oauth_email != current_user.email
+        current_user.update(confirmed_at: nil)
+        current_user.send_confirmation_instructions
+      end
+      if current_user.confirmed_oauth_email.present?
+        current_user.update(confirmed_oauth_email: nil)
+      end
+
       sign_in_and_redirect current_user, event: :authentication
     else
       render :finish_signup

app/models/user.rb

@@ -51,15 +51,17 @@ class User < ActiveRecord::Base
 
   # Get the existing user by email if the provider gives us a verified email.
   def self.first_or_initialize_for_oauth(auth)
-    auth_email      = auth.info.email if auth.info.verified || auth.info.verified_email
+    oauth_email           = auth.info.email
-    auth_email_user = User.find_by(email: auth_email) if auth_email.present?
+    confirmed_oauth_email = oauth_email if auth.info.verified || auth.info.verified_email
+    oauth_user            = User.find_by(email: confirmed_oauth_email) if confirmed_oauth_email.present?
 
-    auth_email_user || User.new(
+    oauth_user || User.new(
       username:  auth.info.name || auth.uid,
-      email: auth_email,
+      email: oauth_email,
+      confirmed_oauth_email: confirmed_oauth_email,
       password: Devise.friendly_token[0,20],
       terms_of_service: '1',
-      confirmed_at: auth_email.present? ? DateTime.now : nil
+      confirmed_at: confirmed_oauth_email.present? ? DateTime.now : nil
     )
   end
 

db/migrate/20160125100637_add_confirmed_oauth_email_to_user.rb

@@ -0,0 +1,5 @@
+class AddConfirmedOauthEmailToUser < ActiveRecord::Migration
+  def change
+    add_column :users, :confirmed_oauth_email, :string
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160122153329) do
+ActiveRecord::Schema.define(version: 20160125100637) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -398,6 +398,7 @@ ActiveRecord::Schema.define(version: 20160122153329) do
     t.integer  "notifications_count",                  default: 0
     t.string   "locale"
     t.boolean  "registering_with_oauth",               default: false
+    t.string   "confirmed_oauth_email"
   end
 
   add_index "users", ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true, using: :btree