Someone Joined Room

someone_joined_room.rb

def initialize
  @students = {}
end


someone_joined_room do |stanza|
  stu = lookup_student(Util.extract_login(stanza.from), true) unless stanza.from == agent_jid_in_room
  if stu
    log "#{stu} joined #{config[:room]}"
  end
end

def lookup_student(username)
  stu = @students[username]
    
  if stu.nil?
    log "Looking up user #{username.inspect} in Rollcall..."
    
    begin
      stu = Rollcall::User.find(username)
    rescue ActiveResource::ResourceNotFound
      log "#{username.inspect} not found in Rollcall..."
      return nil
    end

    unless stu.kind == "Student"
      log "#{username.inspect} is not a student; will be ignored."
      return nil
    end
    
    log "#{username.inspect} loaded in state #{stu.state}"
    
    @students[username] = stu
  end
  
  return stu
end