[UNSTABLE] Install email send hooks into Users::Update

app/mailers/user_mailer.rb

@@ -3,7 +3,6 @@ class UserMailer < ApplicationMailer
       @user      = user
       @user_name = user.name
       @the_url   = "http:" + $API_URL + "/verify?token=" + user.confirmation_token
-      throw "Bad registration?" unless @the_url.present?
       mail(to: @user.email, subject: 'Welcome to The FarmBot Web App!')
     end
 
@@ -13,4 +12,11 @@ class UserMailer < ApplicationMailer
       @host  = $API_URL
       mail(to: @user.email, subject: 'FarmBot Password Reset Instructions')
     end
+
+    def email_update(user)
+      @user  = user
+      @host  = $API_URL
+      raise "TODO: This."
+      mail(to: @user.email, subject: 'FarmBot Email Update Instructions')
+    end
 end

app/models/user.rb

@@ -13,7 +13,11 @@ class User < ApplicationRecord
   before_validation :set_defaults
 
   def set_defaults
-    self.confirmation_token ||= SecureRandom.uuid
+    self.confirmation_token ||= self.reset_confirmation_token
+  end
+
+  def reset_confirmation_token
+    self.confirmation_token = SecureRandom.uuid
   end
 
   def must_consent?

app/mutations/users/update.rb

@@ -20,15 +20,18 @@ module Users
     end
 
     def execute
-      maybe_update_email
+      update_email if email.present?
       user.update_attributes!(inputs.except(:user, :email))
       user.reload
     end
 
 private
 
-    def maybe_update_email
-      raise "TODO"
+    def update_email
+      user.reset_confirmation_token
+      user.unconfirmed_email = email
+      user.save!
+      UserMailer.email_update(user).deliver_later
     end
 
     def confirm_new_password

app/views/user_mailer/email_update.text.erb

@@ -0,0 +1 @@
+...