ping

require 'vendor/autoload.php';
function redisStatus($status = null) {
    Predis\Autoloader::register();
    $client = new Predis\Client('tcp://127.0.0.1:6379', ['parameters' => ['password' => 'null']]);
    $storeStatus = $client->get('status_np');
    echo $status . PHP_EOL;
    if ($storeStatus === $status) {
        return;
    } else {
        $client->set('status_np', $status);
        slack($status, 'check');
    }
}

function slack($message, $channel)
{
    $token = $_SERVER['TOKEN'];
    $ch = curl_init("https://slack.com/api/chat.postMessage");
    $data = http_build_query([
        "token" => $token,
        "channel" => $channel, //"#mychannel",
        "text" => $message, //"Hello, Foo-Bar channel message.",
        "username" => "ExternalHealthCheckBot",
    ]);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    $result = curl_exec($ch);
    curl_close($ch);

    return $result;
}
#slack('test', 'check');
function healthCheck() {
    $url = $_SERVER['CHECK_URL'];
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER,
            ['Content-Type: application/json']
    );
    $result =  curl_exec($ch);


	if (!curl_errno($ch)) {
        	switch ($http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE)) {
            		case 200: #OK
		                redisStatus('Server running');
                		break;
		        default:
               			$str = json_encode(['code' => $http_code, 'response' => $result]);
		                redisStatus($str);
	        }
	} else {
		redisStatus(curl_error($ch));
	}
    curl_close($ch);
}

healthCheck();
exit('finish'.PHP_EOL);