MoneyIntegerCast - For package https://github.com/cknow/laravel-money

MoneyIntegerCast.php

<?php

namespace App\Casts;

use Cknow\Money\Money;
use Cknow\Money\MoneyCast;
use Illuminate\Contracts\Database\Eloquent\CastsAttributes;
use InvalidArgumentException;

class MoneyIntegerCast extends MoneyCast implements CastsAttributes
{
    /**
     * Transform the attribute from the underlying model values.
     *
     * @param \Illuminate\Database\Eloquent\Model $model
     * @param string                              $key
     * @param mixed                               $value
     * @param array                               $attributes
     *
     * @return \Cknow\Money\Money|null
     */
    public function get($model, string $key, $value, array $attributes)
    {
        if ($value === null) {
            return $value;
        }

        $currency = $this->getCurrency($attributes);

        // adding your extra attributes needed
        $attributes = ['subunit' => Money::getCurrencies()->subunitFor($currency)];

        $money = new Money($value, $currency);
        $money->attributes($attributes);
        return $money;
    }


    /**
     * Transform the attribute to its underlying model values.
     *
     * @param \Illuminate\Database\Eloquent\Model $model
     * @param string                              $key
     * @param mixed                               $value
     * @param array                               $attributes
     *
     * @throws \InvalidArgumentException
     *
     * @return array
     */
    public function set($model, string $key, $value, array $attributes)
    {
        if ($value === null) {
            return [$key => $value];
        }

        try {
            $currency = $this->getCurrency($attributes);
            $money = $value instanceof Money ? $value : new Money($value, $currency);
        } catch (InvalidArgumentException $e) {
            throw new InvalidArgumentException(
                sprintf('Invalid data provided for %s::$%s', get_class($model), $key)
            );
        }

        $amount = $money->getAmount();
        if (array_key_exists($this->currency, $attributes)) {
            return [$key => $amount, $this->currency => $money->getCurrency()->getCode()];
        }

        return [$key => $amount];
    }
}