/**
* Check language choice tree in the following order:
* - First: Construct override
* - Second: Parameter override
* - Third: Saved cookie
* - Fourth: Preferences from Accept-Language header
* - Fifth: A language which is a prefix for one of the
* Accept-Language preferences.
* - Sixth: English (default stays)
*
* @private
*
* @return true
*/
private function initLangSelect($option)
{
$set = false;
if (isset($option) && !empty($option)) {
$set = $this->setLang($option);
}
if (!$set && $this->getUseRequestParam() === true && isset($_GET[$this->paramNames['userlang']])) {
$set = $this->setLang($_GET[$this->paramNames['userlang']]);
}
if (!$set && isset($_COOKIE[$this->cookieNames['userlang']])) {
$set = $this->setLang($_COOKIE[$this->cookieNames['userlang']]);
}
if (!$set) {
$acceptableLanguages = TsIntuitionUtil::GetAcceptableLanguages();
foreach ($acceptableLanguages as $acceptLang => $qVal) {
if ($acceptLang === '*') {
/**
* We pick the first available language which is not in $acceptableLanguages.
* The special * range matches every tag not matched by any other range.
* Other language codes in $acceptableLanguages will either have a lower q-value,
* or be missing from availableLanguages.
* The order will be the one in the i18n file: en, af, ar...
*/
foreach ($this->availableLanguages as $availableLang => $true) {
if (!isset($acceptableLanguages[$availableLang])) {
$n = strstr($availableLang, '-');
// Assumption: We won't have translations for languages with more than
// 1 dashe on the language tag
if ($n !== false && !isset($acceptableLanguages[substr($availableLang, 0, $n - 1)])) {
// if we have non-Chinese translations, zh-hans should not be
// picked for "fr,*;q=0.3,zh;q=0.1".
continue;
}
$set = $this->setLang($availableLang);
break;
}
}
if ($set) {
break;
}
} elseif (isset($this->availableLanguages[$acceptLang])) {
$set = $this->setLang($acceptLang);
break;
}
}
}
/* From this point on, we are choosing amongst languages with a $qVal of 0 */
if (!$set) {
/**
* Some browsers show (apparently by default) only a tag,
* such as "ru-RU", "fr-FR" or "es-mx".
* This is broken behavior! The browser should be providing
* appropriate guidance.
* Providing only a full tag is doing a disservice.
* See RFC 2616 section 1.4 - http://tools.ietf.org/html/rfc2616#page-105
*/
foreach ($acceptableLanguages as $acceptLang => $qVal) {
if (!$qVal) {
continue;
}
while (($n = strstr($acceptLang, '-')) !== false) {
$acceptLang = substr($acceptLang, 0, $n - 1);
if (isset($this->availableLanguages[$acceptLang])) {
$set = $this->setLang($acceptLang);
break 2;
}
}
}
}
if (!$set) {
$set = $this->setLang('en');
}
return $set;
}
