class.ilExDownloadSubmissionsZipInteraction.php

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<?php
/* Copyright (c) 1998-2018 ILIAS open source, Extended GPL, see docs/LICENSE */

use ILIAS\BackgroundTasks\Implementation\Tasks\AbstractUserInteraction;
use ILIAS\BackgroundTasks\Types\SingleType;
use ILIAS\BackgroundTasks\Implementation\Values\ScalarValues\StringValue;
use ILIAS\BackgroundTasks\Implementation\Tasks\UserInteraction\UserInteractionOption;
use ILIAS\BackgroundTasks\Task\UserInteraction\Option;
use ILIAS\BackgroundTasks\Bucket;
use ILIAS\Filesystem\Util\LegacyPathHelper;

class ilExDownloadSubmissionsZipInteraction extends AbstractUserInteraction
{
    const OPTION_DOWNLOAD = 'download';
    const OPTION_CANCEL = 'cancel';

    private $logger = null;


    public function __construct()
    {
        $this->logger = $GLOBALS['DIC']->logger()->exc();
    }


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


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


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


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


    public function interaction(array $input, Option $user_selected_option, Bucket $bucket)
    {
        global $DIC;
        $download_name = $input[0]; //directory name.
        $zip_name = $input[1]; // zip job

        $this->logger->debug("Interaction -> input[0] download name MUST BE FULL PATH=> " . $download_name->getValue());
        $this->logger->debug("Interaction -> input[1] zip name MUST BE THE NAME WITHOUT EXTENSION. => " . $zip_name->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 $input;
        }

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


        $zip_name = $zip_name->getValue();

        $ending = substr($zip_name, -4);
        if ($ending != ".zip") {
            $zip_name .= ".zip";
            $this->logger->info("Add .zip extension");
        }

        //Download_name->getValue should return the complete path to the file
        //Zip name is just an string
        ilFileDelivery::deliverFileAttached($download_name->getValue(), $zip_name);

        return $input;
    }
}