<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Intl\ResourceBundle;

/**
 * Default implementation of {@link CurrencyBundleInterface}.
 *
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class CurrencyBundle extends AbstractBundle implements CurrencyBundleInterface
{
    const INDEX_NAME = 0;

    const INDEX_SYMBOL = 1;

    const INDEX_FRACTION_DIGITS = 2;

    const INDEX_ROUNDING_INCREMENT = 3;

    /**
     * {@inheritdoc}
     */
    public function getCurrencySymbol($currency, $locale = null)
    {
        if (null === $locale) {
            $locale = \Locale::getDefault();
        }

        return $this->readEntry($locale, array('Currencies', $currency, static::INDEX_SYMBOL));
    }

    /**
     * {@inheritdoc}
     */
    public function getCurrencyName($currency, $locale = null)
    {
        if (null === $locale) {
            $locale = \Locale::getDefault();
        }

        return $this->readEntry($locale, array('Currencies', $currency, static::INDEX_NAME));
    }

    /**
     * {@inheritdoc}
     */
    public function getCurrencyNames($locale = null)
    {
        if (null === $locale) {
            $locale = \Locale::getDefault();
        }

        if (null === ($currencies = $this->readEntry($locale, array('Currencies')))) {
            return array();
        }

        if ($currencies instanceof \Traversable) {
            $currencies = iterator_to_array($currencies);
        }

        $index = static::INDEX_NAME;

        array_walk($currencies, function (&$value) use ($index) {
            $value = $value[$index];
        });

        return $currencies;
    }

    /**
     * {@inheritdoc}
     */
    public function getFractionDigits($currency)
    {
        return $this->readEntry('en', array('Currencies', $currency, static::INDEX_FRACTION_DIGITS));
    }

    /**
     * {@inheritdoc}
     */
    public function getRoundingIncrement($currency)
    {
        return $this->readEntry('en', array('Currencies', $currency, static::INDEX_ROUNDING_INCREMENT));
    }
}