/**
* Tries to get a locale from the provided accept language
* @param zibo\library\i18n\locale\io\LocaleIO $io
* @param string $acceptLanguage
* @return null|zibo\library\i18n\locale\Locale the locale
*/
private function getLocaleFromAcceptLanguage(LocaleIO $io, $acceptLanguage)
{
if (strpos($acceptLanguage, self::SEPARATOR_PARAMETERS) === false) {
$locale = $acceptLanguage;
} else {
list($locale, $parameters) = explode(self::SEPARATOR_PARAMETERS, $acceptLanguage);
}
if (strpos($locale, self::SEPARATOR_TERRITORY) === false) {
$language = $locale;
$territory = '';
} else {
list($language, $territory) = explode(self::SEPARATOR_TERRITORY, $locale);
}
$language = strtolower($language);
$territory = strtoupper($territory);
if (!empty($territory)) {
$localeCode = $language . '_' . $territory;
$locale = $io->getLocale($localeCode);
if ($locale) {
return $locale;
}
}
$locale = $io->getLocale($language);
if ($locale) {
return $locale;
}
return null;
}
/**
* Initializes the available locales
* @return null
*/
private function initLocales()
{
if (!isset($this->locales)) {
$this->locales = $this->io->getLocales();
}
}