100 lines
2.9 KiB
PHP
100 lines
2.9 KiB
PHP
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Intl\Data\Util;
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/**
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* Scans a directory with data files for locales.
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*
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* The name of each file with the extension ".txt" is considered, if it "looks"
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* like a locale:
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*
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* - the name must start with two letters;
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* - the two letters may optionally be followed by an underscore and any
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* sequence of other symbols.
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*
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* For example, "de" and "de_DE" are considered to be locales. "root" and "meta"
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* are not.
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*
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* @author Bernhard Schussek <bschussek@gmail.com>
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*
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* @internal
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*/
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class LocaleScanner
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{
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/**
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* Returns all locales found in the given directory.
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*
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* @return array An array of locales. The result also contains locales that
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* are in fact just aliases for other locales. Use
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* {@link scanAliases()} to determine which of the locales
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* are aliases
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*/
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public function scanLocales(string $sourceDir): array
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{
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$locales = glob($sourceDir.'/*.txt', \GLOB_NOSORT);
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// Remove file extension and sort
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array_walk($locales, function (&$locale) { $locale = basename($locale, '.txt'); });
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// Remove non-locales
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$locales = array_filter($locales, fn ($locale) => preg_match('/^[a-z]{2}(_.+)?$/', $locale));
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sort($locales);
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return $locales;
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}
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/**
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* Returns all locale aliases found in the given directory.
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*
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* @return array An array with the locale aliases as keys and the aliased
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* locales as values
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*/
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public function scanAliases(string $sourceDir): array
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{
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$locales = $this->scanLocales($sourceDir);
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$aliases = [];
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// Delete locales that are no aliases
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foreach ($locales as $locale) {
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$content = file_get_contents($sourceDir.'/'.$locale.'.txt');
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// Aliases contain the text "%%ALIAS" followed by the aliased locale
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if (preg_match('/"%%ALIAS"\{"([^"]+)"\}/', $content, $matches)) {
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$aliases[$locale] = $matches[1];
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}
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}
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return $aliases;
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}
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/**
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* Returns all locale parents found in the given directory.
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*/
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public function scanParents(string $sourceDir): array
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{
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$locales = $this->scanLocales($sourceDir);
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$fallbacks = [];
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foreach ($locales as $locale) {
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$content = file_get_contents($sourceDir.'/'.$locale.'.txt');
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// Aliases contain the text "%%PARENT" followed by the aliased locale
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if (preg_match('/%%Parent{"([^"]+)"}/', $content, $matches)) {
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$fallbacks[$locale] = $matches[1];
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}
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}
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return $fallbacks;
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}
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}
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