presseportale/app/Services/Newsletter/CampaignSender.php

<?php

namespace App\Services\Newsletter;

use App\Enums\NewsletterCampaignStatus;
use App\Enums\NewsletterRecipientStatus;
use App\Jobs\SendNewsletterCampaignMail;
use App\Models\NewsletterCampaign;
use App\Models\User;

/**
 * Startet den Versand einer Newsletter-Kampagne: friert die Empfängerliste
 * laut Filter als Protokoll-Zeilen ein (Status pending) und stellt pro
 * Empfänger einen Queue-Job ein. Der tatsächliche Versand läuft im Worker;
 * dort wird der Opt-out-Stand erneut geprüft, damit eine Abmeldung zwischen
 * Versandstart und Versand sofort greift.
 */
class CampaignSender
{
    public function __construct(private readonly CampaignRecipients $recipients) {}

    /**
     * @return int Anzahl der eingeplanten Empfänger.
     */
    public function start(NewsletterCampaign $campaign): int
    {
        if (! $campaign->isDraft()) {
            return 0;
        }

        $total = 0;

        $this->recipients->query($campaign->filters ?? [])
            ->select(['id', 'email'])
            ->chunkById(500, function ($users) use ($campaign, &$total): void {
                $rows = $users->map(fn (User $user): array => [
                    'newsletter_campaign_id' => $campaign->id,
                    'user_id' => $user->id,
                    'email' => $user->email,
                    'status' => NewsletterRecipientStatus::Pending->value,
                    'created_at' => now(),
                    'updated_at' => now(),
                ])->all();

                $campaign->recipients()->insert($rows);
                $total += count($rows);
            });

        if ($total === 0) {
            return 0;
        }

        $campaign->update([
            'status' => NewsletterCampaignStatus::Sending->value,
            'recipients_total' => $total,
        ]);

        $campaign->recipients()
            ->select(['id'])
            ->chunkById(500, function ($recipients): void {
                foreach ($recipients as $recipient) {
                    SendNewsletterCampaignMail::dispatch($recipient->id);
                }
            });

        return $total;
    }
}