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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <[email protected]>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Intl\Data\Generator;
use Symfony\Component\Intl\Data\Bundle\Compiler\BundleCompilerInterface;
use Symfony\Component\Intl\Data\Bundle\Reader\BundleEntryReaderInterface;
use Symfony\Component\Intl\Data\Util\ArrayAccessibleResourceBundle;
use Symfony\Component\Intl\Data\Util\LocaleScanner;
use Symfony\Component\Intl\Exception\RuntimeException;
/**
* The rule for compiling the language bundle.
*
* @author Bernhard Schussek <[email protected]>
*
* @internal
*/
class LanguageDataGenerator extends AbstractDataGenerator
{
/**
* Source: https://iso639-3.sil.org/code_tables/639/data.
*/
private const PREFERRED_ALPHA2_TO_ALPHA3_MAPPING = [
'ak' => 'aka',
'ar' => 'ara',
'ay' => 'aym',
'az' => 'aze',
'bo' => 'bod',
'cr' => 'cre',
'cs' => 'ces',
'cy' => 'cym',
'de' => 'deu',
'dz' => 'dzo',
'el' => 'ell',
'et' => 'est',
'eu' => 'eus',
'fa' => 'fas',
'ff' => 'ful',
'fr' => 'fra',
'gn' => 'grn',
'hy' => 'hye',
'hr' => 'hrv',
'ik' => 'ipk',
'is' => 'isl',
'iu' => 'iku',
'ka' => 'kat',
'kr' => 'kau',
'kg' => 'kon',
'kv' => 'kom',
'ku' => 'kur',
'lv' => 'lav',
'mg' => 'mlg',
'mi' => 'mri',
'mk' => 'mkd',
'mn' => 'mon',
'ms' => 'msa',
'my' => 'mya',
'nb' => 'nob',
'ne' => 'nep',
'nl' => 'nld',
'oj' => 'oji',
'om' => 'orm',
'or' => 'ori',
'ps' => 'pus',
'qu' => 'que',
'ro' => 'ron',
'sc' => 'srd',
'sk' => 'slk',
'sq' => 'sqi',
'sr' => 'srp',
'sw' => 'swa',
'uz' => 'uzb',
'yi' => 'yid',
'za' => 'zha',
'zh' => 'zho',
];
private const DENYLIST = [
'root' => true, // Absolute root language
'mul' => true, // Multiple languages
'mis' => true, // Uncoded language
'und' => true, // Unknown language
'zxx' => true, // No linguistic content
];
/**
* Collects all available language codes.
*
* @var string[]
*/
private $languageCodes = [];
/**
* {@inheritdoc}
*/
protected function scanLocales(LocaleScanner $scanner, string $sourceDir): array
{
return $scanner->scanLocales($sourceDir.'/lang');
}
/**
* {@inheritdoc}
*/
protected function compileTemporaryBundles(BundleCompilerInterface $compiler, string $sourceDir, string $tempDir)
{
$compiler->compile($sourceDir.'/lang', $tempDir);
$compiler->compile($sourceDir.'/misc/metadata.txt', $tempDir);
}
/**
* {@inheritdoc}
*/
protected function preGenerate()
{
$this->languageCodes = [];
}
/**
* {@inheritdoc}
*/
protected function generateDataForLocale(BundleEntryReaderInterface $reader, string $tempDir, string $displayLocale): ?array
{
$localeBundle = $reader->read($tempDir, $displayLocale);
// isset() on \ResourceBundle returns true even if the value is null
if (isset($localeBundle['Languages']) && null !== $localeBundle['Languages']) {
$names = [];
$localizedNames = [];
foreach (self::generateLanguageNames($localeBundle) as $language => $name) {
if (!str_contains($language, '_')) {
$this->languageCodes[] = $language;
$names[$language] = $name;
} else {
$localizedNames[$language] = $name;
}
}
$data = [
'Names' => $names,
'LocalizedNames' => $localizedNames,
];
return $data;
}
return null;
}
/**
* {@inheritdoc}
*/
protected function generateDataForRoot(BundleEntryReaderInterface $reader, string $tempDir): ?array
{
return null;
}
/**
* {@inheritdoc}
*/
protected function generateDataForMeta(BundleEntryReaderInterface $reader, string $tempDir): ?array
{
$metadataBundle = $reader->read($tempDir, 'metadata');
$this->languageCodes = array_unique($this->languageCodes);
sort($this->languageCodes);
return [
'Languages' => $this->languageCodes,
'Alpha3Languages' => $this->generateAlpha3Codes($this->languageCodes, $metadataBundle),
'Alpha2ToAlpha3' => $this->generateAlpha2ToAlpha3Mapping($metadataBundle),
'Alpha3ToAlpha2' => $this->generateAlpha3ToAlpha2Mapping($metadataBundle),
];
}
private static function generateLanguageNames(ArrayAccessibleResourceBundle $localeBundle): array
{
return array_diff_key(iterator_to_array($localeBundle['Languages']), self::DENYLIST);
}
private function generateAlpha3Codes(array $languageCodes, ArrayAccessibleResourceBundle $metadataBundle): array
{
$alpha3Codes = array_flip(array_filter($languageCodes, static function (string $language): bool {
return 3 === \strlen($language);
}));
foreach ($metadataBundle['alias']['language'] as $alias => $data) {
if (3 === \strlen($alias) && 'overlong' === $data['reason']) {
$alpha3Codes[$alias] = true;
}
}
ksort($alpha3Codes);
return array_keys($alpha3Codes);
}
private function generateAlpha2ToAlpha3Mapping(ArrayAccessibleResourceBundle $metadataBundle): array
{
$aliases = iterator_to_array($metadataBundle['alias']['language']);
$alpha2ToAlpha3 = [];
foreach ($aliases as $alias => $data) {
$language = $data['replacement'];
if (2 === \strlen($language) && 3 === \strlen($alias) && 'overlong' === $data['reason']) {
if (isset(self::PREFERRED_ALPHA2_TO_ALPHA3_MAPPING[$language])) {
// Validate to prevent typos
if (!isset($aliases[self::PREFERRED_ALPHA2_TO_ALPHA3_MAPPING[$language]])) {
throw new RuntimeException('The statically set three-letter mapping '.self::PREFERRED_ALPHA2_TO_ALPHA3_MAPPING[$language].' for the language code '.$language.' seems to be invalid. Typo?');
}
$alpha3 = self::PREFERRED_ALPHA2_TO_ALPHA3_MAPPING[$language];
$alpha2 = $aliases[$alpha3]['replacement'];
if ($language !== $alpha2) {
throw new RuntimeException('The statically set three-letter mapping '.$alpha3.' for the language code '.$language.' seems to be an alias for '.$alpha2.'. Wrong mapping?');
}
$alpha2ToAlpha3[$language] = $alpha3;
} elseif (isset($alpha2ToAlpha3[$language])) {
throw new RuntimeException('Multiple three-letter mappings exist for the language code '.$language.'. Please add one of them to the const PREFERRED_ALPHA2_TO_ALPHA3_MAPPING.');
} else {
$alpha2ToAlpha3[$language] = $alias;
}
}
}
asort($alpha2ToAlpha3);
return $alpha2ToAlpha3;
}
private function generateAlpha3ToAlpha2Mapping(ArrayAccessibleResourceBundle $metadataBundle): array
{
$alpha3ToAlpha2 = [];
foreach ($metadataBundle['alias']['language'] as $alias => $data) {
$language = $data['replacement'];
if (2 === \strlen($language) && 3 === \strlen($alias) && \in_array($data['reason'], ['overlong', 'bibliographic'], true)) {
$alpha3ToAlpha2[$alias] = $language;
}
}
asort($alpha3ToAlpha2);
return $alpha3ToAlpha2;
}
}