RegistrationAllowedGatekeeper.php

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<?php

namespace Elgg\Router\Middleware;

use Elgg\Exceptions\Http\Gatekeeper\RegistrationAllowedGatekeeperException;
use Elgg\Request;

class RegistrationAllowedGatekeeper {
    
    public function __invoke(Request $request): void {
        if ($this->validateInviteCode($request)) {
            return;
        }
        
        $this->assertRegistrationEnabled();
    }
    
    protected function validateInviteCode(Request $request): bool {
        $friend_guid = (int) $request->getParam('friend_guid');
        $invitecode = $request->getParam('invitecode');
        
        if (empty($friend_guid) || empty($invitecode)) {
            return false;
        }
        
        $friend = get_user($friend_guid);
        if (!$friend instanceof \ElggUser) {
            return false;
        }
        
        if (elgg_validate_invite_code($friend->username, $invitecode)) {
            return true;
        }
        
        throw new RegistrationAllowedGatekeeperException(elgg_echo('RegistrationAllowedGatekeeperException:invalid_invitecode'));
    }
    
    protected function assertRegistrationEnabled(): void {
        if (_elgg_services()->config->allow_registration) {
            return;
        }
        
        throw new RegistrationAllowedGatekeeperException();
    }
}