invoiceninja/app/Http/Requests/TaxRate/UpdateTaxRateRequest.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2023. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Http\Requests\TaxRate;

use App\Http\Requests\Request;
use Illuminate\Validation\Rule;

class UpdateTaxRateRequest extends Request
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize(): bool
    {
        /** @var \App\Models\User $user */
        $user = auth()->user();

        return $user->isAdmin();

    }

    public function rules()
    {

        /** @var \App\Models\User $user */
        $user = auth()->user();

        $rules = [];

        $rules['rate'] = 'sometimes|numeric';

        if ($this->name) {
            $rules['name'] = Rule::unique('tax_rates')->where('company_id', $user->company()->id)->ignore($this->tax_rate->id);
        }

        return $rules;
    }
}