Source files for https://youtu.be/bDjd0EsuTV4

AttachUser.php

<?php

namespace App\Transformers;


use Josantonius\Session\Facades\Session;
use Neoan\Enums\Direction;
use Neoan\Model\Interfaces\Transformation;

class AttachUser implements Transformation
{
    public function __invoke(array $inputOutput, Direction $direction, string $property): array
    {
        if($direction == Direction::IN && !isset($inputOutput[$property]) && Session::has('userId')){
            $inputOutput[$property] = Session::get('userId');
        }
        return $inputOutput;
    }
}

BlogEntry.php

<?php

namespace App\Model;

use App\Transformers\AttachUser;
use App\Transformers\Slug;
use Neoan\Model\Attributes\IsPrimaryKey;
use Neoan\Model\Attributes\IsUnique;
use Neoan\Model\Attributes\Transform;
use Neoan\Model\Attributes\Type;
use Neoan\Model\Model;
use Neoan\Model\Traits\TimeStamps;

class BlogEntry extends Model
{
    #[IsPrimaryKey]
    public int $id;

    #[Transform(AttachUser::class)]
    public int $userId;

    #[IsUnique, Transform(Slug::class)]
    public string $slug;

    public string $title;

    #[Type('Text')]
    public ?string $content;

    use TimeStamps;

}

CreateBlog.php

<?php

namespace App\Controller\Blog;

use App\Model\BlogEntry;
use Neoan\Request\Request;
use Neoan\Routing\Routable;

class CreateBlog implements Routable
{
    public function __invoke(array $provided): BlogEntry|array
    {
        $blog = new BlogEntry(Request::getInputs());
        try{
            $blog->store();
        } catch (\Exception $e){
            return ['error' => $e->getMessage()];
        }
        return $blog;

    }
}

ReadBlog.php

<?php

namespace App\Controller\Blog;

use App\Model\BlogEntry;
use Neoan\Errors\NotFound;
use Neoan\Request\Request;
use Neoan\Routing\Routable;
use League\CommonMark\CommonMarkConverter;

class ReadBlog implements Routable
{
    public function __invoke(array $provided): array
    {

        $slug = Request::getParameter('slug');
        $blog = BlogEntry::retrieveOne(['slug' => $slug, 'deletedAt' => null]);
        if(!$blog){
            new NotFound('/blog/' . $slug);
        }
        $converter = new CommonMarkConverter();
        return [
            'blog' => $blog,
            'converted' =>$converter->convert($blog->content)
        ];
    }
}

Slug.php

<?php

namespace App\Transformers;

use Neoan\Enums\Direction;
use Neoan\Model\Interfaces\Transformation;

class Slug implements Transformation
{
    function __construct()
    {

    }
    function __invoke(array $context, Direction $direction, string $property): array
    {
        if($direction == Direction::IN && !isset($context[$property])){
            $context[$property] = preg_replace('/[^a-z0-9]/i','-',$context['title']);
        }
        return $context;
    }
}