class Reshare < Post 

  belongs_to :root, :class_name => 'Post'
  validate :root_must_be_public
  attr_accessible :root_id, :public

  xml_attr :root_diaspora_id
  xml_attr :root_guid

  before_validation do 
    self.public = true
  end

  def root_guid
    self.root.guid  
  end

  def root_diaspora_id
    self.root.author.diaspora_handle
  end

  def receive(user, person)
    local_reshare = Reshare.where(:guid => self.guid).first
    if local_reshare.root.author_id == user.person.id
      local_reshare.root.reshares << local_reshare
      
      if user.contact_for(person)
        local_reshare.receive(user, person)
      end

    else
      super(user, person)
    end
  end

  private

  def after_parse
    root_author = Webfinger.new(@root_diaspora_id).fetch
    root_author.save!

    unless self.root = Post.where(:guid => @root_guid).first
      self.root = Diaspora::Parser.from_xml(Faraday.get(root_author.url + "/p/#{@root_guid}").body)
      self.root.save!
    end
    
  end

  def root_must_be_public
    if self.root.nil? || !self.root.public
      errors[:base] << "you must reshare public posts"
      return false
    end
  end
end