Set roles when becoming attendee (#7269)

* Set roles when becoming attendee

* Add in all places

app/commands/user/become_bootcamp_attendee.rb

@@ -0,0 +1,11 @@
+class User::BecomeBootcampAttendee
+  include Mandate
+
+  initialize_with :user
+
+  def call
+    user.update!(bootcamp_attendee: true)
+    User::SetDiscordRoles.defer(user)
+    User::SetDiscourseGroups.defer(user)
+  end
+end

app/commands/user/link_with_bootcamp_data.rb

@@ -13,7 +13,7 @@ def call
 
     return unless bootcamp_data.paid?
 
-    user.update!(bootcamp_attendee: true)
+    User::BecomeBootcampAttendee.(user)
   end
 
   memoize

app/controllers/bootcamp_controller.rb

@@ -89,12 +89,12 @@ def stripe_session_status
         access_code: SecureRandom.hex(8)
       )
       if current_user
-        current_user.update!(bootcamp_attendee: true)
+        User::BecomeBootcampAttendee.(current_user)
       else
         user = User.find_by(email: @bootcamp_data.email)
         if user
           @bootcamp_data.update(user:)
-          user.update!(bootcamp_attendee: true)
+          User::BecomeBootcampAttendee.(user)
         end
       end
     end