omg-wtf-ai/app/Models/Post.php

<?php

namespace App\Models;

use App\Enums\PostStatus;
use Database\Factories\PostFactory;
use Illuminate\Database\Eloquent\Attributes\Fillable;
use Illuminate\Database\Eloquent\Attributes\RouteKey;
use Illuminate\Database\Eloquent\Attributes\Scope;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Casts\Attribute;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;
use Illuminate\Support\Str;

#[Fillable([
    'user_id', 'category_id', 'title', 'slug', 'excerpt', 'body',
    'featured_image', 'status', 'published_at', 'meta_title', 'meta_description',
])]
#[RouteKey('slug')]
class Post extends Model
{
    /** @use HasFactory<PostFactory> */
    use HasFactory;

    protected function casts(): array
    {
        return [
            'status' => PostStatus::class,
            'published_at' => 'datetime',
        ];
    }

    protected static function booted(): void
    {
        static::creating(function (Post $post) {
            if (empty($post->slug)) {
                $post->slug = Str::slug($post->title);
            }
        });
    }

    /**
     * @return BelongsTo<User, $this>
     */
    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    /**
     * @return BelongsTo<Category, $this>
     */
    public function category(): BelongsTo
    {
        return $this->belongsTo(Category::class);
    }

    /**
     * @return BelongsToMany<Tag, $this>
     */
    public function tags(): BelongsToMany
    {
        return $this->belongsToMany(Tag::class);
    }

    /**
     * @param  Builder<Post>  $query
     */
    #[Scope]
    protected function published(Builder $query): void
    {
        $query->where('status', PostStatus::Published)
            ->whereNotNull('published_at')
            ->where('published_at', '<=', now());
    }

    protected function bodyHtml(): Attribute
    {
        return Attribute::get(function () {
            $html = Str::markdown($this->body, [
                'html_input' => 'strip',
                'allow_unsafe_links' => false,
            ]);

            // The page template already renders the post title as an <h1>. If the
            // Markdown body also opens with a top-level heading repeating that
            // title, drop it so the page doesn't ship two identical <h1>s.
            return preg_replace_callback(
                '/^\s*<h1>(.*?)<\/h1>/is',
                fn ($matches) => trim(strip_tags($matches[1])) === trim($this->title) ? '' : $matches[0],
                $html,
                limit: 1
            );
        });
    }

    protected function excerptOrSummary(): Attribute
    {
        return Attribute::get(
            fn () => $this->excerpt ?: Str::limit(strip_tags(Str::markdown($this->body)), 160)
        );
    }
}