Who loves Neo?

require "rubygems"
require "neo4j"

class Person
  include Neo4j::NodeMixin

  # define Neo4j properties
  property :name

  # define an one way relationship to any other node
  has_n :friends

  # adds a Lucene index on the following properties
  index :name
  
end

Neo4j::Transaction.run do
  #the players
  neo       = Person.new :name => 'Neo'
  morpheus  = Person.new :name => 'Morpheus'
  trinity   = Person.new :name => 'Trinity'
  cypher    = Person.new :name => 'Cypher'
  smith     = Person.new :name => 'Agent Smith'
  architect = Person.new :name => 'Architect'
  #the connections
  trinity.rels.outgoing(:loves) << neo
  architect.rels.outgoing(:has_coded) << smith
  cypher.friends << morpheus
  cypher.friends << smith
  neo.friends << morpheus
  morpheus.friends << trinity
  
  #find Neo's friends
#  neo.friends.each { |n| puts 'Friend: ' + n.name }

  #Neo's friends of friends
#  neo.friends.depth(2).each { |n| puts 'FOAF: ' + n.name }

  #who is in love?
#  architect.traverse.both(:friends, :has_coded, :loves).depth(:all).filter do
#    outgoing(:loves).to_a.size > 0
#  end.each do |n|
#   puts 'In love: ' + n.name
#  end

  #who loves neo?
  neo.friends.depth(2).each { |node|
    node.rels.outgoing(:loves).each { |love|
      if love.end_node == neo then
        puts love.start_node.name + ' loves Neo'
      end
    }
  }
end