#!/usr/bin/ruby

username = 'my_username'
password = 'my_password'

require 'xmlrpc/client'
require 'digest/md5'

def write_friends(friends)
  File.open(ENV['HOME'] + "/.lj_friends", "w") do |file|
    friends.each do |friend|
      file.puts friend.to_s
    end
  end
end

def read_friends
  friends = []

  begin
    File.open(ENV['HOME'] + "/.lj_friends", "r") do |file|
      while line = file.gets do
        friend = line.chomp
        friends.push(friend.to_s)
      end
    end
  rescue Errno::ENOENT
    return []
  end

  friends
end

server = XMLRPC::Client.new("www.livejournal.com", "/interface/xmlrpc")

result = server.call("LJ.XMLRPC.friendof", {
                     'username' => username,
                     'hpassword' => Digest::MD5.hexdigest(password),
                     'auth_method' => 'clear',
                     'ver' => 0
                   });

friend_ofs = result['friendofs']

current_friends = friend_ofs.collect { |friend|
  friend['username'].to_s
}

old_friends = read_friends()

old_friends.each do |friend|
  if not current_friends.include?(friend)
    puts "Removed friend: " + friend
  end
end

current_friends.each do |friend|
  if not old_friends.include?(friend)
    puts "New friend: " + friend.to_s
    end
end

write_friends(current_friends)