firefly-iii/app/Api/V1/Requests/Models/CurrencyExchangeRate/StoreRequest.php

<?php

/*
 * StoreRequest.php
 * Copyright (c) 2025 james@firefly-iii.org.
 *
 * This file is part of Firefly III (https://github.com/firefly-iii).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see https://www.gnu.org/licenses/.
 */

declare(strict_types=1);

namespace FireflyIII\Api\V1\Requests\Models\CurrencyExchangeRate;

use Carbon\Carbon;
use FireflyIII\Models\TransactionCurrency;
use FireflyIII\Support\Facades\Amount;
use FireflyIII\Support\Request\ChecksLogin;
use FireflyIII\Support\Request\ConvertsDataTypes;
use Illuminate\Foundation\Http\FormRequest;

class StoreRequest extends FormRequest
{
    use ChecksLogin;
    use ConvertsDataTypes;

    protected array $acceptedRoles = [];

    public function getDate(): ?Carbon
    {
        return $this->getCarbonDate('date');
    }

    public function getFromCurrency(): TransactionCurrency
    {
        return Amount::getTransactionCurrencyByCode((string) $this->get('from'));
    }

    public function getRate(): string
    {
        return (string) $this->get('rate');
    }

    public function getToCurrency(): TransactionCurrency
    {
        return Amount::getTransactionCurrencyByCode((string) $this->get('to'));
    }

    /**
     * The rules that the incoming request must be matched against.
     */
    public function rules(): array
    {
        return [
            'date' => ['required', 'date', 'after:1970-01-02', 'before:2038-01-17'],
            'rate' => ['required', 'numeric', 'gt:0'],
            'from' => ['required', 'exists:transaction_currencies,code'],
            'to'   => ['required', 'exists:transaction_currencies,code'],
        ];
    }
}