ldc-legaulois/app/Http/Requests/Bo/Ranges/UpdateSubmodelsOrderRequest.php

<?php

namespace App\Http\Requests\Bo\Ranges;

use App\Models\Range;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Support\Facades\Gate;

class UpdateSubmodelsOrderRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return Gate::check('reorderSubmodels', Range::class);
    }

    /**
     * Prepare the data for validation.
     */
    protected function prepareForValidation(): void
    {
        $this->merge([
            'newValues' => json_decode($this->input('jsonValue'), true),
        ]);
    }

    /**
     * Get the validation rules that apply to the request.
     */
    public function rules(): array
    {
        $currentRange = request('range');

        return [
            'jsonValue'            => 'json',
            'newValues'            => 'required|array',
            'newValues.*'          => 'required|array',
            'newValues.*.id'       => 'required|exists:subranges,id',
            'newValues.*.range_id' => function (string $attribute, mixed $value, \Closure $fail) use ($currentRange) {
                if ($value !== $currentRange->getKey()) {
                    $fail("The {$attribute} is invalid.");
                }
            },
        ];
    }
}