buckets/app/Http/Requests/UpdateScenarioRequest.php

<?php

namespace App\Http\Requests;

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

class UpdateScenarioRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    public function rules(): array
    {
        return [
            'name' => ['sometimes', 'string', 'max:255', 'min:1'],
            'description' => ['sometimes', 'nullable', 'string', 'max:1000'],
            'distribution_mode' => ['sometimes', 'string', Rule::in(DistributionModeEnum::values())],
        ];
    }

    public function messages(): array
    {
        return [
            'name.min' => 'The scenario name must be at least 1 character.',
            'name.max' => 'The scenario name cannot exceed 255 characters.',
            'description.max' => 'The description cannot exceed 1000 characters.',
        ];
    }

    protected function prepareForValidation(): void
    {
        // Trim the name
        if ($this->has('name')) {
            $this->merge([
                'name' => trim($this->name),
            ]);
        }

        // Trim the description
        if ($this->has('description')) {
            $this->merge([
                'description' => $this->description ? trim($this->description) : null,
            ]);
        }
    }
}