public function startPoll($id, $size)
    {
        if ($size > 12) $size = 12;
        $this->state->poll = array(
            'id' => $id,
            'size' => $size,
            'opened' => 1,
            'answers' => array()
        );
        $voteDir = $this->state->directory . '/votes';
        if (is_dir($voteDir)) {
            foreach (scanDir($voteDir) as $file) {
                if ($file != '.' && $file != '..') {
                    unlink($voteDir . '/' . $file);
                }
            }
        } else {
            mkdir($voteDir);
        }
        $this->state->persistPoll();
    }