app/Shared/Validation/PaginationValidator.php

<?php

namespace App\Shared\Validation;

class PaginationValidator
{
    public function normalize(array $input): array
    {
        $page = max(1, (int) ($input['page'] ?? 1));
        $perPage = min(100, max(1, (int) ($input['per_page'] ?? 25)));

        return [
            'page' => $page,
            'per_page' => $perPage,
            'offset' => ($page - 1) * $perPage,
        ];
    }
}