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Add locale negotiation to Icinga\Util\Translator 

Translator::getPreferredLocaleCode($header) can now be used with the
HTTP "Accept-Language" header to return the best matching locale using
the user's preferations reported by the browser and our available locale
stack. Additionally Translator::getLocale and Translator::getLanguage were
replaced by Translator::splitLocaleCode to provide a more flexible
implemenation in order to identify specific parts of a particular locale or
the current one.

refs #6074
This commit is contained in:
Johannes Meyer 2014-06-25 10:42:09 +02:00
parent 53de3686a8
commit 461b050718
3 changed files with 220 additions and 10 deletions
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2
application/layouts/scripts/layout.phtml
View File

@ -12,7 +12,7 @@ if (array_key_exists('_dev', $_GET)) {
}
$ie8jsfile = 'js/icinga.ie8.js';
$lang = Translator::getLanguage();
$lang = Translator::splitLocaleCode()->language;
$isIframe = $this->layout()->isIframe;
$iframeClass = $isIframe ? ' iframe' : '';

94
library/Icinga/Util/Translator.php
View File

@ -46,8 +46,6 @@ class Translator
*/
const DEFAULT_LOCALE = 'en_US';
protected static $locale = 'C';
/**
* Known gettext domains and directories
*
@ -107,20 +105,32 @@ class Translator
}
} else {
$locale = setlocale(LC_ALL, 0);
self::$locale = $locale;
putenv('LC_ALL=' . $locale); // Failsafe, Win and Unix
putenv('LANG=' . $locale); // Windows fix, untested
}
}
public static function getLocale()
/**
* Split and return the language code and country code of the given locale or the current locale
*
* @param string $locale The locale code to split, or null to split the current locale
*
* @return stdClass An object with a 'language' and 'country' attribute
*/
public static function splitLocaleCode($locale = null)
{
return self::$locale;
$matches = array();
$locale = $locale !== null ? $locale : setlocale(LC_ALL, 0);
if (preg_match('@([a-z]{2})[_-]([A-Z]{2})@', $locale, $matches)) {
list($languageCode, $countryCode) = array_slice($matches, 1);
} elseif ($locale === 'C') {
list($languageCode, $countryCode) = preg_split('@[_-]@', static::DEFAULT_LOCALE, 2);
} else {
$languageCode = $locale;
$countryCode = null;
}
public static function getLanguage()
{
return self::$locale === 'C' ? 'en' : substr(self::$locale, 0, 2);
return (object) array('language' => $languageCode, 'country' => $countryCode);
}
/**
@ -144,4 +154,72 @@ class Translator
}
return $codes;
}
/**
* Return the preferred locale based on the given HTTP header and the available translations
*
* @param string $header The HTTP "Accept-Language" header
*
* @return string The browser's preferred locale code
*/
public static function getPreferredLocaleCode($header)
{
$headerValues = explode(',', $header);
for ($i = 0; $i < count($headerValues); $i++) {
// In order to accomplish a stable sort we need to take the original
// index into account as well during element comparison
$headerValues[$i] = array($headerValues[$i], $i);
}
usort( // Sort DESC but keep equal elements ASC
$headerValues,
function ($a, $b) {
$qValA = (float) (strpos($a[0], ';') > 0 ? substr(array_pop((explode(';', $a[0], 2))), 2) : 1);
$qValB = (float) (strpos($b[0], ';') > 0 ? substr(array_pop((explode(';', $b[0], 2))), 2) : 1);
return $qValA < $qValB ? 1 : ($qValA > $qValB ? -1 : ($a[1] > $b[1] ? 1 : ($a[1] < $b[1] ? -1 : 0)));
}
);
for ($i = 0; $i < count($headerValues); $i++) {
// We need to reset the array to its original structure once it's sorted
$headerValues[$i] = $headerValues[$i][0];
}
$requestedLocales = array();
foreach ($headerValues as $headerValue) {
if (strpos($headerValue, ';') > 0) {
$parts = explode(';', $headerValue, 2);
$headerValue = $parts[0];
}
$requestedLocales[] = str_replace('-', '_', $headerValue);
}
$similarMatch = null;
$availableLocales = static::getAvailableLocaleCodes();
$perfectMatch = array_shift((array_intersect($requestedLocales, $availableLocales)));
foreach ($requestedLocales as $requestedLocale) {
if ($perfectMatch === $requestedLocale) {
// The perfect match must be preferred when reached before a similar match is found
return $perfectMatch;
}
$similarMatches = array();
$localeObj = static::splitLocaleCode($requestedLocale);
foreach ($availableLocales as $availableLocale) {
if (static::splitLocaleCode($availableLocale)->language === $localeObj->language) {
$similarMatches[] = $availableLocale;
}
}
if (!empty($similarMatches)) {
$similarMatch = array_shift($similarMatches); // There is no "best" similar match, just use the first
break;
}
}
if (!$perfectMatch && $similarMatch) {
return $similarMatch;
} elseif ($similarMatch && static::splitLocaleCode($similarMatch)->language === static::splitLocaleCode($perfectMatch)->language) {
return $perfectMatch;
} elseif ($similarMatch) {
return $similarMatch;
}
return static::DEFAULT_LOCALE;
}
}

132
test/php/library/Icinga/Util/TranslatorTest.php
View File

@ -8,6 +8,14 @@ use Exception;
use Icinga\Test\BaseTestCase;
use Icinga\Util\Translator;
class TranslatorWithHardcodedLocaleCodes extends Translator
{
public static function getAvailableLocaleCodes()
{
return array('en_US', 'de_DE', 'de_AT');
}
}
class TranslatorTest extends BaseTestCase
{
public function setUp()
@ -75,4 +83,128 @@ class TranslatorTest extends BaseTestCase
'Translator::translate does not translate the given message correctly to French'
);
}
public function testWhetherSplitLocaleCodeSplitsValidLocalesCorrectly()
{
$localeObj = Translator::splitLocaleCode('de_DE');
$this->assertEquals(
'de',
$localeObj->language,
'Translator::splitLocaleCode does not split the language code correctly'
);
$this->assertEquals(
'DE',
$localeObj->country,
'Translator::splitLocaleCode does not split the country code correctly'
);
}
/**
* @depends testWhetherSplitLocaleCodeSplitsValidLocalesCorrectly
*/
public function testWhetherSplitLocaleCodeCanHandleEncodingSuffixes()
{
$this->assertEquals(
'US',
Translator::splitLocaleCode('en_US.UTF-8')->country,
'Translator::splitLocaleCode does not handle encoding suffixes correctly'
);
}
public function testWhetherSplitLocaleCodeInterpretsInvalidLocaleCodesAsLanguageCodes()
{
$this->assertEquals(
'de',
Translator::splitLocaleCode('de')->language,
'Translator::splitLocaleCode does not interpret invalid locale codes as language codes'
);
$this->assertEquals(
'en~US',
Translator::splitLocaleCode('en~US')->language,
'Translator::splitLocaleCode does not interpret invalid locale codes as language codes'
);
}
/**
* @depends testWhetherSplitLocaleCodeSplitsValidLocalesCorrectly
*/
public function testWhetherSplitLocaleCodeReturnsTheDefaultLocaleWhenGivenCAsLocale()
{
$cLocaleObj = Translator::splitLocaleCode('C');
$defaultLocaleObj = Translator::splitLocaleCode(Translator::DEFAULT_LOCALE);
$this->assertEquals(
$defaultLocaleObj->language,
$cLocaleObj->language,
'Translator::splitLocaleCode does not return the default language code when given C as locale'
);
$this->assertEquals(
$defaultLocaleObj->country,
$cLocaleObj->country,
'Translator::splitLocaleCode does not return the default country code when given C as locale'
);
}
/**
* @depends testWhetherSplitLocaleCodeSplitsValidLocalesCorrectly
* @depends testWhetherSplitLocaleCodeInterpretsInvalidLocaleCodesAsLanguageCodes
*/
public function testWhetherGetPreferredLocaleCodeFavorsPerfectMatches()
{
$this->assertEquals(
'de_DE',
TranslatorWithHardcodedLocaleCodes::getPreferredLocaleCode('jp,de_DE;q=0.8,de;q=0.6'),
'Translator::getPreferredLocaleCode does not favor perfect matches'
);
}
/**
* @depends testWhetherSplitLocaleCodeSplitsValidLocalesCorrectly
* @depends testWhetherSplitLocaleCodeInterpretsInvalidLocaleCodesAsLanguageCodes
*/
public function testWhetherGetPreferredLocaleCodeReturnsThePreferredSimilarMatchEvenThoughAPerfectMatchWasFound()
{
$this->assertEquals(
'de_DE',
TranslatorWithHardcodedLocaleCodes::getPreferredLocaleCode('de_CH,en_US;q=0.8'),
'Translator::getPreferredLocaleCode does not return the preferred similar match'
);
}
/**
* @depends testWhetherSplitLocaleCodeSplitsValidLocalesCorrectly
* @depends testWhetherSplitLocaleCodeInterpretsInvalidLocaleCodesAsLanguageCodes
*/
public function testWhetherGetPreferredLocaleCodeReturnsAPerfectMatchEvenThoughASimilarMatchWasFound()
{
$this->assertEquals(
'de_AT',
TranslatorWithHardcodedLocaleCodes::getPreferredLocaleCode('de,de_AT;q=0.5'),
'Translator::getPreferredLocaleCode does not return a perfect '
. 'match if a similar match with higher priority was found'
);
}
/**
* @depends testWhetherSplitLocaleCodeInterpretsInvalidLocaleCodesAsLanguageCodes
*/
public function testWhetherGetPreferredLocaleCodeReturnsASimilarMatchIfNoPerfectMatchCouldBeFound()
{
$this->assertEquals(
'de_DE',
TranslatorWithHardcodedLocaleCodes::getPreferredLocaleCode('de,en'),
'Translator::getPreferredLocaleCode does not return the most preferred similar match'
);
}
/**
* @depends testWhetherSplitLocaleCodeSplitsValidLocalesCorrectly
*/
public function testWhetherGetPreferredLocaleCodeReturnsTheDefaultLocaleIfNoMatchCouldBeFound()
{
$this->assertEquals(
Translator::DEFAULT_LOCALE,
TranslatorWithHardcodedLocaleCodes::getPreferredLocaleCode('fr_FR,jp_JP'),
'Translator::getPreferredLocaleCode does not return the default locale if no match could be found'
);
}
}