Add confirmable email to user model

app/models/spree/user_decorator.rb

@@ -19,10 +19,17 @@ Spree.user_class.class_eval do
   accepts_nested_attributes_for :ship_address
 
   attr_accessible :enterprise_ids, :enterprise_roles_attributes, :enterprise_limit, :locale, :bill_address_attributes, :ship_address_attributes
-  after_create :send_signup_confirmation
 
   validate :limit_owned_enterprises
 
+  # We use the same options as Spree and add :confirmable
+  devise :database_authenticatable, :token_authenticatable, :registerable, :recoverable,
+    :rememberable, :trackable, :validatable, :confirmable, :encryptable,
+    :reconfirmable => true, confirmation_keys: [ :id, :email ], :encryptor => 'authlogic_sha512'
+  handle_asynchronously :send_confirmation_instructions
+  # TODO: Later versions of devise have a dedicated after_confirmation callback, so use that
+  after_update :welcome_after_confirm, if: lambda { confirmation_token_changed? && confirmation_token.nil? }
+
   def known_users
     if admin?
       Spree::User.scoped
@@ -46,6 +53,14 @@ Spree.user_class.class_eval do
     customers.find_by_enterprise_id(enterprise)
   end
 
+  def welcome_after_confirm
+    # Send welcome email if we are confirming an user's email
+    # Note: this callback only runs on email confirmation
+    if confirmed? && unconfirmed_email.nil? && !unconfirmed_email_changed?
+      send_signup_confirmation
+    end
+  end
+
   def send_signup_confirmation
     Delayed::Job.enqueue ConfirmSignupJob.new(id)
   end

db/migrate/20170710145821_add_confirmable_to_user.rb

@@ -0,0 +1,13 @@
+class AddConfirmableToUser < ActiveRecord::Migration
+  def up
+    add_column :spree_users, :confirmation_token, :string
+    add_column :spree_users, :confirmed_at, :datetime
+    add_column :spree_users, :confirmation_sent_at, :datetime
+    add_column :spree_users, :unconfirmed_email, :string
+    add_index :spree_users, :confirmation_token, :unique => true
+  end
+
+  def down
+    remove_columns :spree_users, :confirmation_token, :confirmed_at, :confirmation_sent_at, :unconfirmed_email
+  end
+end

db/schema.rb

@@ -1004,8 +1004,13 @@ ActiveRecord::Schema.define(:version => 20170921065259) do
     t.string   "api_key",                :limit => 40
     t.integer  "enterprise_limit",                     :default => 1, :null => false
     t.string   "locale",                 :limit => 5
+    t.string   "confirmation_token"
+    t.datetime "confirmed_at"
+    t.datetime "confirmation_sent_at"
+    t.string   "unconfirmed_email"
   end
 
+  add_index "spree_users", ["confirmation_token"], :name => "index_spree_users_on_confirmation_token", :unique => true
   add_index "spree_users", ["email"], :name => "email_idx_unique", :unique => true
   add_index "spree_users", ["persistence_token"], :name => "index_users_on_persistence_token"