class Post < ActiveRecord::Base
  belongs_to :forum, :counter_cache => true
  belongs_to :user,  :counter_cache => true
  belongs_to :topic, :counter_cache => true

  format_attribute :body
  before_create { |r| r.forum_id = r.topic.forum_id }
  after_create  { |r| Topic.update_all(['replied_at = ?, replied_by = ?, last_post_id = ?', r.created_at, r.user_id, r.id], ['id = ?', r.topic_id]) }
  after_destroy { |r| t = Topic.find(r.topic_id) ; Topic.update_all(['replied_at = ?, replied_by = ?, last_post_id = ?', t.posts.last.created_at, t.posts.last.user_id, t.posts.last.id], ['id = ?', t.id]) if t.posts.last }

  validates_presence_of :user_id, :body
  validate :body_cannot_contain_blacklisted_strings

  attr_accessible :body

  def editable_by?(user)
    user && (user.id == user_id || user.admin? || user.moderator_of?(topic.forum_id))
  end

  def to_xml(options = {})
    options[:except] ||= []
    options[:except] << :topic_title << :forum_name
    super
  end

  def body_cannot_contain_blacklisted_strings
    downcase_body = body.downcase rescue ''
    blacklist     = Blacklist.find(:first).list rescue ''
    prohibited    = false

    blacklist.split("\n").each do |item|
      if downcase_body.include?(item)
        prohibited = true
        break
      end
    end

    errors.add(:body, "contains prohibited text") if prohibited == true
  end
end