ops-Gazelle/app/User/Notification/News.php

<?php

namespace Gazelle\User\Notification;

class News extends AbstractNotification {
    public function className(): string {
        return 'information';
    }

    public function clear(): int {
        if (new \Gazelle\WitnessTable\UserReadNews()->witness($this->user)) {
            $this->user->flush();
        }
        return new \Gazelle\Manager\News()->latestId();
    }

    public function load(): bool {
        $newsMan = new \Gazelle\Manager\News();
        ["id" => $newsId, "title" => $title] = $newsMan->latest();
        if ($newsId === -1) {
            return false;
        }
        $lastRead = new \Gazelle\WitnessTable\UserReadNews()->lastRead($this->user);

        // You must be new around here.
        $newJoiner = is_null($lastRead)
            && strtotime($newsMan->latest()['created']) > strtotime($this->user->created());

        if ($newJoiner || $newsId > $lastRead) {
            $this->title   = "Announcement: $title";
            $this->url     = "index.php#news$newsId";
            $this->context = $newsId;
            return true;
        }
        return false;
    }
}