<?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\Locale;



class Locale extends \Locale

{

    /**

     * Caches the countries in different locales

     * @var array

     */

    protected static $countries = array();



    /**

     * Caches the languages in different locales

     * @var array

     */

    protected static $languages = array();



    /**

     * Caches the different locales

     * @var array

     */

    protected static $locales = array();



    /**

     * Returns the country names for a locale

     *

     * @param string $locale The locale to use for the country names

     *

     * @return array              The country names with their codes as keys

     *

     * @throws RuntimeException   When the resource bundles cannot be loaded

     */

    static public function getDisplayCountries($locale)

    {

        if (!isset(self::$countries[$locale])) {

            $bundle = \ResourceBundle::create($locale, __DIR__.'/Resources/data/region');



            if (null === $bundle) {

                throw new \RuntimeException('The country resource bundle could not be loaded');

            }



            $collator = new \Collator($locale);

            $countries = array();

            $bundleCountries = $bundle->get('Countries') ?: array();



            foreach ($bundleCountries as $code => $name) {

                // Global countries (f.i. "America") have numeric codes

                // Countries have alphabetic codes

                // "ZZ" is the code for unknown country

                if (ctype_alpha($code) && 'ZZ' !== $code) {

                    $countries[$code] = $name;

                }

            }



            $fallbackLocale = self::getFallbackLocale($locale);

            if (null !== $fallbackLocale) {

                $countries = array_merge(self::getDisplayCountries($fallbackLocale), $countries);

            }



            $collator->asort($countries);



            self::$countries[$locale] = $countries;

        }



        return self::$countries[$locale];

    }



    /**

     * Returns all available country codes

     *

     * @return array              The country codes

     * @throws RuntimeException   When the resource bundles cannot be loaded

     */

    static public function getCountries()

    {

        return array_keys(self::getDisplayCountries(self::getDefault()));

    }



    /**

     * Returns the language names for a locale

     *

     * @param string $locale The locale to use for the language names

     *

     * @return array              The language names with their codes as keys

     *

     * @throws RuntimeException   When the resource bundles cannot be loaded

     */

    static public function getDisplayLanguages($locale)

    {

        if (!isset(self::$languages[$locale])) {

            $bundle = \ResourceBundle::create($locale, __DIR__.'/Resources/data/lang');



            if (null === $bundle) {

                throw new \RuntimeException('The language resource bundle could not be loaded');

            }



            $collator = new \Collator($locale);

            $languages = array();

            $bundleLanguages = $bundle->get('Languages') ?: array();



            foreach ($bundleLanguages as $code => $name) {

                // "mul" is the code for multiple languages

                if ('mul' !== $code) {

                    $languages[$code] = $name;

                }

            }



            $fallbackLocale = self::getFallbackLocale($locale);

            if (null !== $fallbackLocale) {

                $languages = array_merge(self::getDisplayLanguages($fallbackLocale), $languages);

            }



            $collator->asort($languages);



            self::$languages[$locale] = $languages;

        }



        return self::$languages[$locale];

    }



    /**

     * Returns all available language codes

     *

     * @return array              The language codes

     * @throws RuntimeException   When the resource bundles cannot be loaded

     */

    static public function getLanguages()

    {

        return array_keys(self::getDisplayLanguages(self::getDefault()));

    }



    /**

     * Returns the locale names for a locale

     *

     * @param string $locale The locale to use for the locale names

     * @return array              The locale names with their codes as keys

     * @throws RuntimeException   When the resource bundles cannot be loaded

     */

    static public function getDisplayLocales($locale)

    {

        if (!isset(self::$locales[$locale])) {

            $bundle = \ResourceBundle::create($locale, __DIR__.'/Resources/data/names');



            if (null === $bundle) {

                throw new \RuntimeException('The locale resource bundle could not be loaded');

            }



            $collator = new \Collator($locale);

            $locales = array();

            $bundleLocales = $bundle->get('Locales') ?: array();



            foreach ($bundleLocales as $code => $name) {

                $locales[$code] = $name;

            }



            $fallbackLocale = self::getFallbackLocale($locale);

            if (null !== $fallbackLocale) {

                $locales = array_merge(self::getDisplayLocales($fallbackLocale), $locales);

            }



            $collator->asort($locales);



            self::$locales[$locale] = $locales;

        }



        return self::$locales[$locale];

    }



    /**

     * Returns all available locale codes

     *

     * @return array              The locale codes

     * @throws RuntimeException   When the resource bundles cannot be loaded

     */

    static public function getLocales()

    {

        return array_keys(self::getDisplayLocales(self::getDefault()));

    }



    /**

     * Returns the fallback locale for a given locale, if any

     *

     * @param $locale             The locale to find the fallback for

     * @return string|null        The fallback locale, or null if no parent exists

     */

    static protected function getFallbackLocale($locale)

    {

        if ($locale === self::getDefault()) {

            return null;

        }



        if (false === $pos = strrpos($locale, '_')) {

            return self::getDefault();

        }



        return substr($locale, 0, $pos);

    }

}