module Safubot
  # General identity cache. Extended by service-specific modules.
  # A single class in order to allow linking of identity between services.
  class KnownUser
    include MongoMapper::Document
    safe

	many :requests, :as => "user", :class_name => "Safubot::Request"

	timestamps!

    # Combines the service-specific identities of two users to
    # form a cohesive picture of an individual.
    def merge(user)
	  self.keys.keys.each do |key|
		Log.info "#{key.inspect} #{self[key].inspect} #{user[key].inspect}"
		self[key] = user[key] if self[key].nil? || (self[key].respond_to?(:empty?) && self[key].empty?)
	  end

	  user.requests.each do |req|
		req.user = self; req.save!
	  end

	  save!

	  user.destroy
    end
  end
end