regi2p/checker.php

<?php
require __DIR__ . '/vendor/autoload.php';
require __DIR__ . '/config.php';

use App\BOB;
use App\DB;
use Amp\Loop;
use Amp\Parallel\Worker\DefaultPool;

/* Disable execution limit */
set_time_limit(0);

$pdo = (new DB($options))->pdo;

$results = [];

echo "[DB] Fetching hosts to check from database" . PHP_EOL;
if ((($options['fullhour'] >= 0) && ($options['fullhour'] <= 23)) && date('H') == $options['fullhour']) { // check all hosts at full check hour
    $STH = $pdo->query("SELECT `host`, `base32` FROM `hosts`");

} else {
    $STH = $pdo->query("SELECT `host`, `base32` FROM `hosts` WHERE `disabled` = '0'");
}
$hosts = $STH->fetchAll(PDO::FETCH_KEY_PAIR);

echo "[BOB] Starting session for checking" . PHP_EOL;
$bob = new BOB($options);
if ($bob->setnick()) {
    $bob->options();
    $bob->newkeys();
    $bob->intun();
    $bob->start();

    /* Sleep 10 seconds awaitng tunnels get built */
    echo "[BOB] Session started, awaiting 10 seconds for tunnels" . PHP_EOL;
    sleep(10);

} else {
    echo "[BOB] Stale session is found, using it" . PHP_EOL;
    $bob->getnick();
}

/* Start async checker tasks */
Loop::run(function () use (&$results, $hosts, $options) {
    $pool = new DefaultPool(64);

    $coroutines = [];

    foreach ($hosts as $host => $base32) {
        $coroutines[$host] = Amp\call(function () use ($pool, $base32, $options) {
            return yield $pool->enqueue(new App\Checker($base32, $options));
        });
    }

    $results = yield Amp\Promise\all($coroutines);

    return yield $pool->shutdown();
});

echo "[BOB] Stopping session" . PHP_EOL;
$bob->stop();
$bob->clear();
$bob = null;


echo "[DB] Saving check results" . PHP_EOL;
$i = 0;
$pdo->beginTransaction();

foreach ($results as $host => $ts) {
    if($ts) {
        $pdo->exec("UPDATE `hosts` SET `last_seen` = FROM_UNIXTIME(" . $ts . "), `disabled` = 0, `hidden` = 0 WHERE `host` = '" . $host . "'");
        $i++;
    }
}

$pdo->commit();

echo "Result: Total hosts: " . count($results) . ", Alive: " . $i . PHP_EOL;