keuangan/app/Domains/Finance/Support/ValueObjects/Money.php

<?php

namespace App\Domains\Finance\Support\ValueObjects;

use InvalidArgumentException;
use NumberFormatter;
use Stringable;

class Money implements Stringable
{
    public function __construct(public float $amount)
    {
        if ($this->amount < 0) {
            throw new InvalidArgumentException('Money cannot be negative.');
        }
    }

    /**
     * Format the bytes into a human-readable string.
     */
    public function format(string $currency = 'IDR'): string
    {
        $format = new NumberFormatter(app()->getLocale(), NumberFormatter::CURRENCY);

        return $format->formatCurrency($this->amount, $currency);
    }

    /**
     * Automatically format when echoed in Blade (e.g., {{ $model->amount }}).
     */
    public function __toString(): string
    {
        return $this->format();
    }
}