contact_model.rb

class Contact < ApplicationRecord
  before_save :update_status_notifications
    
    #...
    
    def update_status_notifications
      # Clear notifications
      unless status_notification_ids.empty?
        status_notification_ids.each do |id|
          UserMailer.dequeue_status_notification(id)
        end
        status_notification_ids = []
      end
      # Queue notifications
      queue_status_notifications if last_meeting
    end
    
    def queue_status_notifications
      status_middle_date = last_meeting + ideal_contact_frequency
      if status_middle_date > Date.today
        job = UserMailer.queue_status_middle_notification(self, wait_until: status_middle_date.to_time)
        status_notification_ids << job.provider_job_id
      end

      status_bad_date = last_meeting + minimum_contact_frequency
      if status_bad_date > Date.today
        job = UserMailer.queue_status_bad_notification(self, wait_until: status_bad_date.to_time)
        status_notification_ids << job.provider_job_id
      end
    end
end