--Greets the user that just connected, greets her again if she says "hello".
--Says "Yeah, bye!" if she says bye and closes connection with her.

return {

  connect = function (self, host, port)
    ret = self.super:connect(host, port)
    self.super:send "Hello there!\n"
    return ret
  end,

  recv = function (self)
    local line, err = self.super:recv()
    if line == nil then
      return line, err
    end
    if line:lower():find "hello" then
      self.send "Yeah, hi!\n"
    end
    if line:lower():find "bye" then
      self.send "Yeah, bye!\n"
      self.close()
    end
    return line
  end,

}