Simple Previous and Next Navigation with Laravel Eloquent

gistfile1.php

<?php

namespace App\Domain\Repositories;

use App\Domain\Repositories\DbRepository;
use App\Domain\Entities\SomeEntity;

/**
 *
 */
class DbSomeRepository extends DbRepository {

    /**
     * @var SomeModel
     */
    protected $model;
    
    /**
     * @var current
     */
    protected $current;

    /**
     * @param SomeModel $model
     */
    function __construct(SomeModel $model)
    {
        $this->model = $model;
    }

    public function simplePaginate($current)
    {
        $this->current = $current;
        $previous = $this->previous();
        $next = $this->next();
        return compact('previous', 'next');
    }

    protected function previous()
    {
        return $this->simplePaginateQuery('>', 'asc');
    }

    protected function next()
    {
        return $this->simplePaginateQuery('<', 'desc');
    }

    protected function simplePaginateQuery($operator, $order)
    {
        return $this->model
            ->where('published_at', $operator, $this->current->published_at)
            ->orderBy('published_at', $order)
            ->limit(1)
            ->first();
    }

}