parfum/app/Helpers/StringHelpers.php

<?php

use App\Enums\VoucherType;
use Illuminate\Support\Number;
use Illuminate\Support\Str;

if (! function_exists('currency')) {
    function currency(?string $value = null, ?string $currency = null, ?string $locale = 'id_ID'): string
    {
        if ($value === null) {
            return '';
        }

        return $currency.Number::format($value, locale: $locale);
    }
}

if (! function_exists('replaceCurrency')) {
    function replaceCurrency(?string $value = null)
    {
        if ($value === null) {
            return null;
        }

        return (int) Str::replace('.', '', $value);
    }
}

if (! function_exists('percentage')) {
    function percentage(int|float $value, int $precision = 2, int $maxPrecision = 2, ?string $locale = 'id_ID'): string
    {
        return Number::percentage($value, $precision, $maxPrecision, $locale);
    }
}

if (! function_exists('formatDiscount')) {
    function formatDiscount($amount, VoucherType $type, string $currency = 'Rp'): string
    {
        return $type === VoucherType::PERCENTAGE
            ? percentage($amount)
            : currency($amount, $currency);
    }
}

if (! function_exists('generateReferralCode')) {
    function generateReferralCode(string $username, int $unique): string
    {
        $prefix = Str::substr($username, 0, 6);
        $year = date('y');

        return Str::upper($prefix).$year.$unique;
    }
}