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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\String\Resources;
use Symfony\Component\HttpClient\HttpClient;
use Symfony\Component\String\Exception\RuntimeException;
use Symfony\Component\VarExporter\VarExporter;
use Symfony\Contracts\HttpClient\HttpClientInterface;
/**
* @internal
*/
final class WcswidthDataGenerator
{
private string $outDir;
private HttpClientInterface $client;
public function __construct(string $outDir)
{
$this->outDir = $outDir;
$this->client = HttpClient::createForBaseUri('https://www.unicode.org/Public/UNIDATA/');
}
public function generate(): void
{
$this->writeWideWidthData();
$this->writeZeroWidthData();
}
private function writeWideWidthData(): void
{
if (!preg_match('/^# EastAsianWidth-(\d+\.\d+\.\d+)\.txt/', $content = $this->client->request('GET', 'EastAsianWidth.txt')->getContent(), $matches)) {
throw new RuntimeException('The Unicode version could not be determined.');
}
$version = $matches[1];
if (!preg_match_all('/^([A-H\d]{4,})(?:\.\.([A-H\d]{4,}))? +; [W|F]/m', $content, $matches, \PREG_SET_ORDER)) {
throw new RuntimeException('The wide width pattern did not match anything.');
}
$this->write('wcswidth_table_wide.php', $version, $matches);
}
private function writeZeroWidthData(): void
{
if (!preg_match('/^# DerivedGeneralCategory-(\d+\.\d+\.\d+)\.txt/', $content = $this->client->request('GET', 'extracted/DerivedGeneralCategory.txt')->getContent(), $matches)) {
throw new RuntimeException('The Unicode version could not be determined.');
}
$version = $matches[1];
if (!preg_match_all('/^([A-H\d]{4,})(?:\.\.([A-H\d]{4,}))? *; (?:Me|Mn)/m', $content, $matches, \PREG_SET_ORDER)) {
throw new RuntimeException('The zero width pattern did not match anything.');
}
$this->write('wcswidth_table_zero.php', $version, $matches);
}
private function write(string $fileName, string $version, array $rawData): void
{
$content = $this->getHeader($version).'return '.VarExporter::export($this->format($rawData)).";\n";
if (!file_put_contents($this->outDir.'/'.$fileName, $content)) {
throw new RuntimeException(sprintf('The "%s" file could not be written.', $fileName));
}
}
private function getHeader(string $version): string
{
$date = (new \DateTimeImmutable())->format('c');
return <<<EOT
<?php
/*
* This file has been auto-generated by the Symfony String Component for internal use.
*
* Unicode version: $version
* Date: $date
*/
EOT;
}
private function format(array $rawData): array
{
$data = array_map(static function (array $row): array {
$start = $row[1];
$end = $row[2] ?? $start;
return [hexdec($start), hexdec($end)];
}, $rawData);
usort($data, static fn (array $a, array $b): int => $a[0] - $b[0]);
return $data;
}
}