sfp_api_laravel_serprati/app/Http/Requests/NotificationRequest.php

<?php

namespace App\Http\Requests;

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

class NotificationRequest extends FormRequest
{
    public function rules(): array
    {
        $rules = [
            'type'               => 'sometimes|string|max:50',
            'source'             => 'sometimes|nullable|string|max:100',
            'source_id'          => 'sometimes|nullable|integer',
            'title'              => 'sometimes|string|max:255',
            'message'            => 'sometimes|string',
            'recipient'          => ['sometimes', Rule::enum(NotificationRecipientEnum::class)],
            'recipient_position' => 'sometimes|nullable|string|max:100',
            'recipient_sector'   => 'sometimes|nullable|string|max:100',
        ];

        if ($this->isMethod('post')) {
            $rules['type']      = 'required|string|max:50';
            $rules['title']     = 'required|string|max:255';
            $rules['message']   = 'required|string';
            $rules['recipient'] = ['required', Rule::enum(NotificationRecipientEnum::class)];
        }

        return $rules;
    }
}