nyan

<?php

namespace App\Models;

use Carbon\Carbon;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Spatie\Sitemap\Contracts\Sitemapable;
use Spatie\Sitemap\Tags\Url;

class Article extends Model implements Sitemapable
{
    use HasFactory;

protected $table = 'artikel';

protected $fillable = [
        'title',
        'url',
        'author',
        'date',
        'banner_image',
        'banner_image_low',
        'banner_image_mobile',
        'banner_image_mobile_low',
        'alt_text',
        'content',
        'keywords',
        'article_category_id'
    ];

const CREATED_AT = 'created_at';
    const UPDATED_AT = 'updated_at';

public function generateTableOfContent()
    {
        $pattern = '/<h[1-6]>(.*?)<\/h[1-6]>/';
        preg_match_all($pattern, $this->content, $matches);

$toc = [];
        foreach ($matches[1] as $match) {
            $toc[] = $match;
        }

return $toc;
    }

public function article_category()
    {
        return $this->belongsTo(ArticleCategory::class, 'article_category_id');
    }

public function toSitemapTag(): Url|string|array
    {
        return Url::create(route('blog.show', $this->url))
            ->setLastModificationDate(Carbon::create($this->updated_at))
            ->setChangeFrequency(Url::CHANGE_FREQUENCY_YEARLY)
            ->setPriority(0.1);
    }
}