zend-blog-3-backend

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<?php
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namespace App\Twig\Extension;
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use App\Exception\Twig\AssetNotExistException;
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use Twig\Extension\AbstractExtension;
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use Twig\TwigFunction;
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class Assets extends AbstractExtension
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{
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    public function getFunctions()
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    {
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        return [
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            new TwigFunction(
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                'assets',
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                [$this, 'assets'],
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                [
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                    'is_safe' => ['html'],
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                ]
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            ),
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        ];
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    }
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    public function assets(string $path): string
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    {
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        $matches = [];
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        if (!preg_match('/^(?P<prefix>.+)\.(?P<ext>css|js)$/', $path, $matches)) {
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            return "<unknown src=\"{$path}\"/>";
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        }
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        if ($matches['ext'] === 'css') {
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            $format = '<link rel="stylesheet" href="%s.v%d.css">';
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        } else {
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            $format = '<script src="%s.v%d.js"></script>';
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        }
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        return sprintf($format, $matches['prefix'], $this->version($path));
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    }
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    /**
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     * @param string $path
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     *
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     * @return int
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     */
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    private function version(string $path): int
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    {
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        $file = APP_WEB_DIR . $path;
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        if (!is_file($file)) {
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            throw new AssetNotExistException('File not exist: ' . $file);
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        }
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        $mtime = (int)filemtime($file);
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        return $mtime - (($mtime >> 20) << 20);
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    }
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}
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