.
 *
 */
use Friendica\App;
use Friendica\Core\Protocol;
use Friendica\DI;
use Friendica\Model\APContact;
use Friendica\Model\Contact;
use Friendica\Protocol\ActivityPub;
function ostatus_subscribe_content(App $a)
{
	if (!local_user()) {
		notice(DI::l10n()->t('Permission denied.'));
		DI::baseUrl()->redirect('ostatus_subscribe');
		// NOTREACHED
	}
	$o = '
' . DI::l10n()->t('Subscribing to contacts') . '
';
	$uid = local_user();
	$counter = intval($_REQUEST['counter'] ?? 0);
	if (DI::pConfig()->get($uid, 'ostatus', 'legacy_friends') == '') {
		if ($_REQUEST['url'] == '') {
			DI::pConfig()->delete($uid, 'ostatus', 'legacy_contact');
			return $o . DI::l10n()->t('No contact provided.');
		}
		$contact = Contact::getByURL($_REQUEST['url']);
		if (!$contact) {
			DI::pConfig()->delete($uid, 'ostatus', 'legacy_contact');
			return $o . DI::l10n()->t('Couldn\'t fetch information for contact.');
		}
		if ($contact['network'] == Protocol::OSTATUS) {
			$api = $contact['baseurl'] . '/api/';
			// Fetching friends
			$curlResult = DI::httpRequest()->get($api . 'statuses/friends.json?screen_name=' . $contact['nick']);
			if (!$curlResult->isSuccess()) {
				DI::pConfig()->delete($uid, 'ostatus', 'legacy_contact');
				return $o . DI::l10n()->t('Couldn\'t fetch friends for contact.');
			}
			$friends = $curlResult->getBody();
			if (empty($friends)) {
				DI::pConfig()->delete($uid, 'ostatus', 'legacy_contact');
				return $o . DI::l10n()->t('Couldn\'t fetch following contacts.');
			}
			DI::pConfig()->set($uid, 'ostatus', 'legacy_friends', $friends);
		} elseif ($apcontact = APContact::getByURL($contact['url'])) {
			if (empty($apcontact['following'])) {
				DI::pConfig()->delete($uid, 'ostatus', 'legacy_contact');
				return $o . DI::l10n()->t('Couldn\'t fetch remote profile.');
			}
			$followings = ActivityPub::fetchItems($apcontact['following']);
			if (empty($followings)) {
				DI::pConfig()->delete($uid, 'ostatus', 'legacy_contact');
				return $o . DI::l10n()->t('Couldn\'t fetch following contacts.');
			}
			DI::pConfig()->set($uid, 'ostatus', 'legacy_friends', json_encode($followings));
		} else {
			DI::pConfig()->delete($uid, 'ostatus', 'legacy_contact');
			return $o . DI::l10n()->t('Unsupported network');
		}
	}
	$friends = json_decode(DI::pConfig()->get($uid, 'ostatus', 'legacy_friends'));
	if (empty($friends)) {
		$friends = [];
	}
	$total = sizeof($friends);
	if ($counter >= $total) {
		DI::page()['htmlhead'] = '';
		DI::pConfig()->delete($uid, 'ostatus', 'legacy_friends');
		DI::pConfig()->delete($uid, 'ostatus', 'legacy_contact');
		$o .= DI::l10n()->t('Done');
		return $o;
	}
	$friend = $friends[$counter++];
	$url = $friend->statusnet_profile_url ?? $friend;
	$o .= '' . $counter . '/' . $total . ': ' . $url;
	$probed = Contact::getByURL($url);
	if (in_array($probed['network'], Protocol::FEDERATED)) {
		$result = Contact::createFromProbe($a->user, $probed['url']);
		if ($result['success']) {
			$o .= ' - ' . DI::l10n()->t('success');
		} else {
			$o .= ' - ' . DI::l10n()->t('failed');
		}
	} else {
		$o .= ' - ' . DI::l10n()->t('ignored');
	}
	$o .= '
';
	$o .= '' . DI::l10n()->t('Keep this window open until done.') . '
';
	DI::page()['htmlhead'] = '';
	return $o;
}