invoiceninja/app/Jobs/DownloadInvoices.php

<?php

namespace App\Jobs;

use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;
use App\Models\User;
use App\Ninja\Mailers\UserMailer;
use Barracuda\ArchiveStream\Archive;

/**
 * Class SendInvoiceEmail.
 */
//class DownloadInvoices extends Job implements ShouldQueue
class DownloadInvoices extends Job
{
    //use InteractsWithQueue, SerializesModels;

    /**
     * @var User
     */
    protected $user;

    /**
     * @var array
     */
    protected $invoices;

    /**
     * Create a new job instance.
     *
     * @param mixed   $files
     * @param mixed   $settings
     */
    public function __construct(User $user, $invoices)
    {
        $this->user = $user;
        $this->invoices = $invoices;
    }

    /**
     * Execute the job.
     *
     * @param ContactMailer $mailer
     */
    public function handle(UserMailer $userMailer)
    {
        $zip = Archive::instance_by_useragent(date('Y-m-d') . '-Invoice_PDFs');

        foreach ($this->invoices as $invoice) {
            $zip->add_file($invoice->getFileName(), $invoice->getPDFString());
        }

        $zip->finish();
        exit;

        /*
        // if queues are disabled download a zip file
        if (config('queue.default') === 'sync' || count($this->invoices) <= 10) {
            $zip = Archive::instance_by_useragent(date('Y-m-d') . '-Invoice_PDFs');
            foreach ($this->invoices as $invoice) {
                $zip->add_file($invoice->getFileName(), $invoice->getPDFString());
            }
            $zip->finish();
            exit;

        // otherwise sends the PDFs in an email
        } else {
            $data = [];
            foreach ($this->invoices as $invoice) {
                $data[] = [
                    'name' => $invoice->getFileName(),
                    'data' => $invoice->getPDFString(),
                ];
            }

            $subject = trans('texts.invoices_are_attached');
            $data = [
                'documents' => $data
            ];

            $userMailer->sendMessage($this->user, $subject, false, $data);
        }
        */
    }
}