trabajo-afectivo/app/models/authorization.rb

class Authorization < ApplicationModel
  belongs_to              :user
  validates_presence_of   :user_id, :uid, :provider
  validates_uniqueness_of :uid,     :scope => :provider
  
  after_create            :cache_delete
  after_update            :cache_delete
  after_destroy           :cache_delete
  
  def self.find_from_hash(hash)
    auth = Authorization.where( :provider => hash['provider'], :uid => hash['uid'] )
    if auth && auth.first then
#      raise auth.first.to_yaml
#      raise hash.to_yaml

      # update auth tokens
      auth.first.update_attributes(
        :token    => hash['credentials']['token'],
        :secret   => hash['credentials']['secret']
      )
      
      # update image if needed
      if hash['info']['image']
        user = User.where( :id => auth.first.user_id ).first
        user.update_attributes(
          :image => hash['info']['image']
        )

        # reset cache
        user.cache_delete
      end
    end

    return auth.first
  end
  
  def self.create_from_hash(hash, user = nil)
    if user then
      user.update_attributes(
        :username => hash['username'],
        :image    => hash['info']['image']
      )
    else
      user = User.create_from_hash!(hash)    
    end
    Authorization.create(
      :user     => user,
      :uid      => hash['uid'],
      :username => hash['username'],
      :provider => hash['provider'],
      :token    => hash['credentials']['token'],
      :secret   => hash['credentials']['secret']
    )

    # reset cache
    user.cache_delete
  end
end