/**
* Automatically detect the language preferences from the browser, choosing
* the best fit language that exists on our system or falling back to en-GB
* when no preferred language exists.
*
* @param string $appName The application's name to load language strings for
* @param string $suffix The suffix of the language file, by default it's .ini
* @param string $languagePath The base path to the language files (optional)
*
* @return string The language code
*/
public static function detectLanguage($appName = null, $suffix = '.ini', $languagePath = null)
{
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
$languages = strtolower($_SERVER["HTTP_ACCEPT_LANGUAGE"]);
// $languages = ' fr-ch;q=0.3, da, en-us;q=0.8, en;q=0.5, fr;q=0.3';
// need to remove spaces from strings to avoid error
$languages = str_replace(' ', '', $languages);
$languages = explode(",", $languages);
// First we need to sort languages by their weight
$temp = array();
foreach ($languages as $lang) {
$parts = explode(';', $lang);
$q = 1;
if (count($parts) > 1 && substr($parts[1], 0, 2) == 'q=') {
$q = floatval(substr($parts[1], 2));
}
$temp[$parts[0]] = $q;
}
arsort($temp);
$languages = $temp;
foreach ($languages as $language => $weight) {
// pull out the language, place languages into array of full and primary
// string structure:
$temp_array = array();
// slice out the part before the dash, place into array
$temp_array[0] = $language;
//full language
$parts = explode('-', $language);
$temp_array[1] = $parts[0];
// cut out primary language
if (strlen($temp_array[0]) == 5 && (substr($temp_array[0], 2, 1) == '-' || substr($temp_array[0], 2, 1) == '_')) {
$langLocation = strtoupper(substr($temp_array[0], 3, 2));
$temp_array[0] = $temp_array[1] . '-' . $langLocation;
}
//place this array into main $user_languages language array
$user_languages[] = $temp_array;
}
if (!isset($user_languages)) {
return 'en-GB';
}
if (empty($appName)) {
$appName = Application::getInstance()->getName();
}
if (empty($languagePath)) {
$languagePath = Application::getInstance($appName)->getContainer()->languagePath;
}
$baseName = $languagePath . '/' . strtolower($appName) . '/';
if (!@is_dir($baseName)) {
$baseName = $languagePath . '/';
}
if (!@is_dir($baseName)) {
return 'en-GB';
}
// Look for classic file layout
foreach ($user_languages as $languageStruct) {
// Search for exact language
$langFilename = $baseName . $languageStruct[0] . $suffix;
if (!file_exists($langFilename)) {
$langFilename = '';
$filesystem = new File(array());
$allFiles = $filesystem->directoryFiles($baseName, $languageStruct[1] . '\\-.*', false, true);
if (count($allFiles)) {
$langFilename = array_shift($allFiles);
}
}
if (!empty($langFilename) && file_exists($langFilename)) {
return basename($langFilename, $suffix);
}
}
// Look for subdirectory layout
$allFolders = array();
try {
$di = new \DirectoryIterator($baseName);
} catch (\Exception $e) {
return 'en-GB';
}
/** @var \DirectoryIterator $file */
foreach ($di as $file) {
if ($di->isDot()) {
continue;
}
if (!$di->isDir()) {
continue;
}
$allFolders[] = $file->getFilename();
}
foreach ($user_languages as $languageStruct) {
if (array_key_exists($languageStruct[0], $allFolders)) {
return $languageStruct[0];
}
foreach ($allFolders as $folder) {
if (strpos($folder, $languageStruct[1]) === 0) {
return $folder;
}
}
}
}
return 'en-GB';
}
