DeliveryMethodObjective.php

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<?php

declare(strict_types=1);

namespace ILIAS\FileDelivery\Setup;

use ILIAS\Setup\Artifact;
use ILIAS\Setup\Artifact\ArrayArtifact;
use ILIAS\Setup\Environment;
use ILIAS\Setup\Artifact\BuildArtifactObjective;

class DeliveryMethodObjective extends BuildArtifactObjective
{
    public const SETTINGS = 'delivery_method';
    public const XSENDFILE = 'xsendfile';
    public const XACCEL = 'xaccel';
    public const PHP = 'php';

    public function getArtifactName(): string
    {
        return "delivery_method";
    }



    public function build(): Artifact
    {
        // check if mod_xsendfile is loaded
        if ($this->isModXSendFileLoaded()) {
            return new ArrayArtifact([
                self::SETTINGS => self::XSENDFILE
            ]);
        }

        return new ArrayArtifact([
            self::SETTINGS => self::PHP
        ]);
    }

    private function isModXSendFileLoaded(): bool
    {
        if (function_exists('apache_get_modules') && in_array('mod_xsendfile', apache_get_modules(), true)) {
            return true;
        }

        try {
            $command_exists = shell_exec("which apache2ctl");
            if ($command_exists === null || empty($command_exists)) {
                return false;
            }

            $loaded_modules = array_map(static fn($module): string => explode(" ", trim((string) $module))[0] ?? "", explode("\n", shell_exec("apache2ctl -M 2>/dev/null") ?? ''));
        } catch (\Throwable) {
            $loaded_modules = [];
        }
        return in_array('xsendfile_module', $loaded_modules, true);
    }

    #[\Override]
    public function isApplicable(Environment $environment): bool
    {
        return !file_exists(BuildArtifactObjective::PATH());
    }

}