invoiceninja/app/Http/Controllers/ClientPortal/InvitationController.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com)
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2020. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Http\Controllers\ClientPortal;

use App\Http\Controllers\Controller;
use App\Models\InvoiceInvitation;
use App\Utils\Traits\MakesDates;
use App\Utils\Traits\MakesHash;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

/**
 * Class InvitationController
 * @package App\Http\Controllers\ClientPortal\InvitationController
 */

class InvitationController extends Controller
{
    use MakesHash;
    use MakesDates;

    public function router(string $entity, string $invitation_key)
    {
        $key = $entity.'_id';
        $entity_obj = 'App\Models\\'.ucfirst($entity).'Invitation';

        $invitation = $entity_obj::whereRaw("BINARY `key`= ?", [$invitation_key])->first();

        if ($invitation) {
            if ((bool)$invitation->contact->client->getSetting('enable_client_portal_password') !== false) {
                $this->middleware('auth:contact');
            } else {
                auth()->guard('contact')->login($invitation->contact, false);
            }
                
            $invitation->markViewed();

            return redirect()->route('client.'.$entity.'.show', [$entity => $this->encodePrimaryKey($invitation->{$key})]);
        } else {
            abort(404);
        }
    }

    public function routerForIframe(string $entity, string $client_hash, string $invitation_key)
    {
    }
}