/**
* validates a subscription's url
* @param ISubscription $subscription
* @throws \OCA\Calendar\Backend\Exception
*/
protected function validateSubscriptionUrl(ISubscription &$subscription)
{
$url = $subscription->getUrl();
$parsed = parse_url($url);
if (!$parsed) {
throw new BackendUtils\Exception('URL not processable');
}
if (!isset($parsed['scheme'])) {
//TODO - try to use https first
$newUrl = 'http://';
$newUrl .= $url;
$subscription->setUrl($newUrl);
$parsed['scheme'] = 'http';
}
if ($parsed['scheme'] === 'webcal') {
$newUrl = preg_replace("/^webcal:/i", "http:", $url);
$subscription->setUrl($newUrl);
$parsed['scheme'] = 'http';
}
if ($parsed['scheme'] !== 'http' && $parsed['scheme'] !== 'https') {
throw new BackendUtils\Exception('Protocol not supported');
}
}
