1:  2:  3:  4:  5:  6:  7:  8:  9: 10: 11: 12: 13: 14: 15: 16: 17: 18: 19: 20: 21: 22: 23: 24: 25: 26: 27: 28: 29: 30: 31: 32: 33: 34: 35: 36: 37: 38: 39: 40: 41: 42: 43: 44: 45: 46: 47: 48: 49: 50: 51: 52: 53: 54: 55: 56: 57: 58: 59: 60: 61: 62: 63: 64: 65: 66: 67: 68: 69: 70: 71: 

<?php
/**
 * Small utility class.
 *
 * @author Lemmmy
 */
class Utils
{
    /**
     * The useragent to use for cURL requests to the online indicator
     */
    const USER_AGENT = "osu!next Signature Generator - lemmmy.pw/osusig/ - v3";

    /**
     * The URL for the online indicator API thingy
     */
    const ONLINE_URL = "http://onlineindicator.lemmmy.pw:3960";

    /**
     * The memcache singleton
     *
     * @var Memcached
     */
    private static $mc;

    public static function getMemcache() {
        if (!isset(self::$mc)) {
            self::$mc = new Memcached();
            self::$mc->addServer("localhost", 11211);
        }

        return self::$mc;
    }

    public static function largeNumberFormat($number) {
        $n = round($number);

        $n_number_format = number_format($n);
        $n_array = explode(',', $n_number_format);
        $n_parts = array('k', 'M', 'B', 'T');
        $n_count_parts = count($n_array) - 1;

        $n_display = $n_array[0] . ((int) $n_array[1][0] !== 0 ? '.' . $n_array[1][0] : '');
        $n_display .= $n_parts[$n_count_parts - 1];

        return $n_display;
    }

    public static function isUserOnline($username) {
        $onlineStatus = self::$mc->get("osusig_v3_online_" . $username);

        if (!isset($onlineStatus) || empty($onlineStatus)) {
            $ch = curl_init();

            curl_setopt($ch, CURLOPT_URL, self::ONLINE_URL . '?u=' . str_replace(' ', '_', $username));
            curl_setopt($ch, CURLOPT_HEADER, 0);
            curl_setopt($ch, CURLOPT_USERAGENT, self::USER_AGENT);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($ch, CURLOPT_TIMEOUT_MS, 1250);

            $response = json_decode(curl_exec($ch));
            curl_close($ch);

            self::$mc->set("osusig_v3_online_" . $username, $response->online, 60);

            return $response->online;
        } else {
            return $onlineStatus;
        }
    }
}