class User < ActiveRecord::Base
	has_many :tags
	has_many :products
	has_many :friendships

	validates_presence_of :fuid
	validates_uniqueness_of :fuid

	def self.import(facebook_session)
		user = self.create!(:fuid => facebook_session.user.uid)
		facebook_session.user.friends.each do |friend|
			 self.add_friend(user.id, friend.uid)
		end
		user
	end

	def self.add_friend(user_id, friend_fuid)
		friend = self.find_by_fuid(friend_fuid)
		if friend
			Friendship.create!(:user_id => user_id, :friend_id => friend.id)
			Friendship.create!(:user_id => friend.id, :friend_id => user_id)
		end
	end

	def friends
		friendships.each do |friendship|
			user = User.find_by_user_id(friendship.friend_id)
			users << user
		end
		users
	end
end