Fedora Package Group Lister

grouplist.php

<?php

namespace Fedora\Packages;

use SimpleXMLElement;
use XMLReader;

class FedoraRelease
{
    const RELEASES_URI = 'https://archives.fedoraproject.org/pub/archive/fedora/linux/releases/';

    private array $groups = [];

    private string $compsXML = '';

    public function __construct(
        private int $version,
    ) {
        echo "<h2>Fedora {$version} Package Groups</h2>";
    }

    public function groups()
    {
        return $this->groups;
    }

    public function loadCompsFor(string $edition)
    {
        $uri = $this->findCompsFile(ucfirst(strtolower($edition)));;

        $xml = XMLReader::XML(file_get_contents($uri));

        while ($xml->read()) {
            if ($xml->name != 'group') {
                continue;
            }

            $grp = PackageGroup::fromXml($xml);
            if ($grp) {
                $this->groups[] = $grp;
            }
        }
    }

    private function findCompsFile(string $edition)
    {
        $baseUri = sprintf('%s%d/%s/x86_64/os/repodata/', self::RELEASES_URI, $this->version, $edition);

        $index = file_get_contents($baseUri);

        $m = preg_match('/<a href="([0-9a-f]+-comps-'.$edition.'.x86_64.xml)">/', $index, $matches);
        if ($m) {
            return $baseUri . $matches[1];
        }
    }
}

class PackageGroup
{
    public function __construct(
        private string $id,
        private string $name,
        private string $description,
        private bool $default,
        private bool $visible,
        private PackageList $packages
    ) {}

    public static function fromXml(XMLReader $x)
    {
        $raw = simplexml_load_string($x->readOuterXml());
        $obj = (object) (array) $raw;

        if (!isset($obj->id)) {
            return;
        }

        return new self(
            $obj->id,
            $obj->name[0] ?? 'unknown',
            $obj->description[0] ?? '',
            (bool) $obj->default,
            (string) $obj->uservisible === 'false' ? false : true,
            new PackageList($raw->packagelist),
        );
    }

    public function printHeader()
    {
        echo '<div style="width: 320px; float: left; max-height: 500px; overflow: auto;">';
        echo sprintf('<h3 title="Package ID: %s">%s</h3>', $this->id, $this->name);
        echo '<p>' . $this->description . '</p>';
    }

    public function printPkglist()
    {
        echo $this->packages . '</div>';
    }
}

class PackageList
{
    private array $packages;

    public function __construct(SimpleXMLElement $tree)
    {
        $requires = (array) $tree->packagereq;
        foreach ($tree->packagereq as $req) {
            $attrs = $req->attributes();

            if (isset($req['@attributes'])) {
                unset($req['@attributes']);
            }
            $this->append(sprintf('%s %s', $attrs->type ? "[$attrs->type]" : '', $req));
        }
    }

    public function append(string $package)
    {
        $this->packages[] = $package;
    }

    public function __toArray(): array
    {
        return $this->packages;
    }

    public function __toString(): string
    {
        return '<ul><li>' . implode('</li><li>', $this->packages) . '.</li></ul>';
    }
}

$release = new FedoraRelease((int) ($_GET['release'] ?? 36));
$release->loadCompsFor($_GET['edition'] ?? 'server');

foreach ($release->groups() as $group) {
    $group->printHeader();
    $group->printPkglist();
}