Notify user about new RS authorizations

app/models/remote_storage_authorization.rb

@@ -18,7 +18,7 @@ class RemoteStorageAuthorization < ApplicationRecord
   before_create  :store_token_in_redis
   before_create  :find_or_create_web_app
   after_create   :schedule_token_expiry
-  # after_create   :notify_user
+  after_create   :notify_user
   before_destroy :delete_token_from_redis
   after_destroy  :remove_token_expiry_job
 
@@ -93,4 +93,22 @@ class RemoteStorageAuthorization < ApplicationRecord
     rescue URI::InvalidURIError
       false
     end
+
+    def notify_user
+      notify = user.preferences[:remotestorage_notify_auth_created]
+
+      case notify
+      when "xmpp"
+        router = Router.new
+        payload = {
+          type: "normal", to: user.address,
+          from: Setting.xmpp_notifications_from_address,
+          body: "You have just granted '#{self.client_id}' access to your Kosmos Storage. Visit your Storage dashboard to check on your connected apps and revoke permissions anytime: #{router.services_storage_url}"
+        }
+        XmppSendMessageJob.perform_later(payload)
+      when "email"
+        NotificationMailer.with(user: user, auth: self)
+                          .remotestorage_auth_created.deliver_later
+      end
+    end
 end