AggregateCurrencies.php

<?php
 
namespace Money\Currencies;
 
use Money\Currencies;
use Money\Currency;
use Money\Exception\UnknownCurrencyException;
 
final class AggregateCurrencies implements Currencies
{
    private $currencies;
 
    public function __construct(array $currencies)
    {
        foreach ($currencies as $c) {
            if (false === $c instanceof Currencies) {
                throw new \InvalidArgumentException('All currency repositories must implement '.Currencies::class);
            }
        }
 
        $this->currencies = $currencies;
    }
 
    public function contains(Currency $currency)
    {
        foreach ($this->currencies as $currencies) {
            if ($currencies->contains($currency)) {
                return true;
            }
        }
 
        return false;
    }
 
    public function subunitFor(Currency $currency)
    {
        foreach ($this->currencies as $currencies) {
            if ($currencies->contains($currency)) {
                return $currencies->subunitFor($currency);
            }
        }
 
        throw new UnknownCurrencyException('Cannot find currency '.$currency->getCode());
    }
 
    public function getIterator()
    {
        $iterator = new \AppendIterator();
 
        foreach ($this->currencies as $currencies) {
            $iterator->append($currencies->getIterator());
        }
 
        return $iterator;
    }
}