video.rb

class Video < ActiveRecord::Base
  attr_accessible :credits, :image, :link, :title, :video_category_id, :homepage, :client
  belongs_to :video_category
  before_validation :update_attributes_through_api
  mount_uploader :image, ImageUploader
  acts_as_list
  
  def vimeo_url
   return "http://vimeo.com/api/v2/video/#{self.link}.json"
  end
  
  private
  def update_attributes_through_api
    if self.title.blank? or self.credits.blank? or self.image.blank?
      video = JSON.parse(open(self.vimeo_url).read).last
      if video.present?
        self.title = video["title"] unless self.title.present?
        self.credits = video["description"] unless self.credits.present?
        self.image = video["thumbnail_large"] unless self.image.present?
      end
    end
    return self
  end
  
end