class.ilBTControllerGUI.php

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<?php

use ILIAS\BackgroundTasks\Implementation\Tasks\UserInteraction\UserInteractionOption;
use ILIAS\Modules\OrgUnit\ARHelper\DIC;

class ilBTControllerGUI
{
    use DIC;
    const FROM_URL = 'from_url';
    const OBSERVER_ID = 'observer_id';
    const SELECTED_OPTION = 'selected_option';
    const CMD_ABORT = 'abortBucket';
    const CMD_REMOVE = 'abortBucket';
    const CMD_USER_INTERACTION = 'userInteraction';
    const IS_ASYNC = 'bt_task_is_async';
    const CMD_GET_REPLACEMENT_ITEM = "getAsyncReplacementItem";


    public function executeCommand() : void
    {
        $cmd = $this->ctrl()->getCmd();
        switch ($cmd) {
            case self::CMD_GET_REPLACEMENT_ITEM:
                $this->getAsyncReplacementItem();
                break;
            case self::CMD_USER_INTERACTION:
                $this->userInteraction();
                break;
            case self::CMD_ABORT:
            case self::CMD_REMOVE:
                $this->abortBucket();
                break;
            default:
                break;
        }
    }


    protected function userInteraction() : void
    {
        $observer_id = (int) $this->http()->request()->getQueryParams()[self::OBSERVER_ID];
        $selected_option = $this->http()->request()->getQueryParams()[self::SELECTED_OPTION];
        $from_url = $this->getFromURL();

        $observer = $this->dic()->backgroundTasks()->persistence()->loadBucket($observer_id);
        if ((int) $observer->getUserId() !== (int) $this->user()->getId()) {
            return;
        }
        $option = new UserInteractionOption("", $selected_option);
        $this->dic()->backgroundTasks()->taskManager()->continueTask($observer, $option);
        if ($this->http()->request()->getQueryParams()[self::IS_ASYNC] === "true") {
            $this->http()->close();
        }
        $this->ctrl()->redirectToURL($from_url);
    }


    protected function abortBucket()
    {
        $observer_id = (int) $this->http()->request()->getQueryParams()[self::OBSERVER_ID];
        $from_url = $this->getFromURL();

        $bucket = $this->dic()->backgroundTasks()->persistence()->loadBucket($observer_id);

        $this->dic()->backgroundTasks()->taskManager()->quitBucket($bucket);
        if ($this->http()->request()->getQueryParams()[self::IS_ASYNC] === "true") {
            exit;
        }
        $this->ctrl()->redirectToURL($from_url);
    }


    protected function getAsyncReplacementItem()
    {
        $observer_id = (int) $this->http()->request()->getQueryParams()[self::OBSERVER_ID];
        $bucket = $this->dic()->backgroundTasks()->persistence()->loadBucket($observer_id);

        $item_source = new ilBTPopOverGUI($this->dic());
        $this->dic()->language()->loadLanguageModule('background_tasks');
        $item = $item_source->getItemForObserver($bucket);
        echo $this->dic()->ui()->renderer()->renderAsync($item);
        exit;
    }


    protected function getFromURL()
    {
        $from_url = self::unhash($this->http()->request()->getQueryParams()[self::FROM_URL]);

        return $from_url;
    }


    public static function hash($url)
    {
        return base64_encode($url);
    }


    public static function unhash($url)
    {
        return base64_decode($url);
    }
}