sfp_api_laravel_serprati/app/Http/Requests/MediaRequest.php

<?php

namespace App\Http\Requests;

use App\Enums\MediaTypeEnum;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class MediaRequest extends FormRequest
{
    public function rules(): array
    {
        $rules = [
            'type'      => ['sometimes', Rule::enum(MediaTypeEnum::class)],
            'source'    => 'sometimes|nullable|string|max:100',
            'source_id' => 'sometimes|nullable|integer',
            'path'      => 'sometimes|string|max:500',
            'name'      => 'sometimes|string|max:255',
            'url'       => 'sometimes|string|max:500',
        ];

        if ($this->isMethod('post')) {
            $rules['type']      = ['required', Rule::enum(MediaTypeEnum::class)];
            $rules['path']      = 'required|string|max:500';
            $rules['name']      = 'required|string|max:255';
            $rules['url']       = 'required|string|max:500';
        }

        return $rules;
    }
}