19wu/19wu

# -*- coding: utf-8 -*-
class EventObserver < ActiveRecord::Observer
  def before_create(event)
    save_group event
  end

  def after_create(event)
    notify_followers event
    event.tickets.create name: '门票', price: 0
  end

  def before_update(event)
    if event.slug
      group = event.group
      if group and group.slug != event.slug and group.events.size <= 1
        group.destroy
        fallback_url = FallbackUrl.find_or_initialize_by origin: group.slug
        fallback_url.change_to = event.slug
        fallback_url.save
      end
      save_group event
    end
  end

  def after_find(event)
    event.slug ||= event.group.try(:slug)
  end

  private

  def save_group(event)
    group = event.user.groups.where(:slug => event.slug).first_or_create!
    event.group = group
  end

  def notify_followers(event)
    event.group.followers.each do |follower|
      UserMailer.delay.notify_email follower, event
    end
  end
end