class.ilDownloadZipInteraction.php

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<?php
use ILIAS\BackgroundTasks\Bucket;
use ILIAS\BackgroundTasks\Implementation\Tasks\AbstractUserInteraction;
use ILIAS\BackgroundTasks\Implementation\Tasks\UserInteraction\UserInteractionOption;
use ILIAS\BackgroundTasks\Implementation\Values\ScalarValues\StringValue;
use ILIAS\BackgroundTasks\Implementation\Values\ThunkValue;
use ILIAS\BackgroundTasks\Task\UserInteraction\Option;
use ILIAS\BackgroundTasks\Types\SingleType;
use ILIAS\BackgroundTasks\Types\Type;
use ILIAS\BackgroundTasks\Value;
use ILIAS\Filesystem\Util\LegacyPathHelper;

class ilDownloadZipInteraction extends AbstractUserInteraction
{
    public const OPTION_DOWNLOAD = 'download';
    public const OPTION_CANCEL = 'cancel';
    private ?ilLogger $logger;


    public function __construct()
    {
        global $DIC;
        $this->logger = $DIC->logger()->cal();
    }


    public function getInputTypes(): array
    {
        return [
            new SingleType(StringValue::class),
            new SingleType(StringValue::class),
        ];
    }


    public function getRemoveOption(): Option
    {
        return new UserInteractionOption('remove', self::OPTION_CANCEL);
    }


    public function getOutputType(): Type
    {
        return new SingleType(StringValue::class);
    }


    public function getOptions(array $input): array
    {
        return [
            new UserInteractionOption('download', self::OPTION_DOWNLOAD),
        ];
    }


    public function interaction(array $input, Option $user_selected_option, Bucket $bucket): Value
    {
        global $DIC;
        $zip_name = $input[1];
        $download_name = $input[0];

        $this->logger->debug('User interaction download zip ' . $input[0]->getValue() . ' as '
            . $input[1]->getValue());

        if ($user_selected_option->getValue() != self::OPTION_DOWNLOAD) {
            $this->logger->info('Download canceled');
            // delete zip file
            $filesystem = $DIC->filesystem()->temp();

            try {
                $path = LegacyPathHelper::createRelativePath($zip_name->getValue());
            } catch (InvalidArgumentException $e) {
                $path = null;
            }
            if (!is_null($path) && $filesystem->has($path)) {
                $filesystem->deleteDir(dirname($path));
            }

            return new ThunkValue();
        }

        $this->logger->info("Delivering File.");

        ilFileDelivery::deliverFileAttached($download_name->getValue(), $zip_name->getValue());

        return new ThunkValue();
    }

    public function canBeSkipped(array $input): bool
    {
        return false;
    }

}