Refactor UsersController#create

* Simplify controller action
* Extract service classes

lib/user_activator.rb

@@ -1,59 +0,0 @@
-# Responsible for dealing with different activation processes when a user is created
-class UserActivator
-  attr_reader :user, :request, :session, :cookies
-
-  def initialize(user, request, session, cookies)
-    @user = user
-    @session = session
-    @cookies = cookies
-    @request = request
-  end
-
-  def activation_message
-    activator.activate
-  end
-
-  private
-
-  def activator
-    factory.new(user, request, session, cookies)
-  end
-
-  def factory
-    if SiteSetting.must_approve_users?
-      ApprovalActivator
-    elsif !user.active?
-      EmailActivator
-    else
-      LoginActivator
-    end
-
-  end
-end
-
-class ApprovalActivator < UserActivator
-  def activate
-    I18n.t("login.wait_approval")
-  end
-end
-
-class EmailActivator < UserActivator
-  def activate
-    Jobs.enqueue(:user_email,
-      type: :signup,
-      user_id: user.id,
-      email_token: user.email_tokens.first.token
-    )
-    I18n.t("login.activate_email", email: user.email)
-  end
-end
-
-class LoginActivator < UserActivator
-  include CurrentUser
-
-  def activate
-    log_on_user(user)
-    user.enqueue_welcome_message('welcome_user')
-    I18n.t("login.active")
-  end
-end