firefly-iii/app/Transformers/CurrencyTransformer.php

<?php
/**
 * CurrencyTransformer.php
 * Copyright (c) 2019 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\Transformers;

use FireflyIII\Models\TransactionCurrency;

/**
 * Class CurrencyTransformer
 */
class CurrencyTransformer extends AbstractTransformer
{

    /**
     * Transform the currency.
     *
     * @param TransactionCurrency $currency
     *
     * @return array
     */
    public function transform(TransactionCurrency $currency): array
    {
        $isDefault       = false;
        $defaultCurrency = $this->parameters->get('defaultCurrency');
        if (null !== $defaultCurrency) {
            $isDefault = (int) $defaultCurrency->id === (int) $currency->id;
        }
        return [
            'id'             => (int) $currency->id,
            'created_at'     => $currency->created_at->toAtomString(),
            'updated_at'     => $currency->updated_at->toAtomString(),
            'default'        => $isDefault,
            'enabled'        => $currency->enabled,
            'name'           => $currency->name,
            'code'           => $currency->code,
            'symbol'         => $currency->symbol,
            'decimal_places' => (int) $currency->decimal_places,
            'links'          => [
                [
                    'rel' => 'self',
                    'uri' => '/currencies/' . $currency->id,
                ],
            ],
        ];
    }
}