Sindbad~EG File Manager

<?php

/**
 * ---------------------------------------------------------------------
 *
 * GLPI - Gestionnaire Libre de Parc Informatique
 *
 * http://glpi-project.org
 *
 * @copyright 2015-2022 Teclib' and contributors.
 * @copyright 2003-2014 by the INDEPNET Development Team.
 * @licence   https://www.gnu.org/licenses/gpl-3.0.html
 *
 * ---------------------------------------------------------------------
 *
 * LICENSE
 *
 * This file is part of GLPI.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * ---------------------------------------------------------------------
 */

/**
 * Following variables have to be defined before inclusion of this file:
 * @var CommonITILTask $task
 */

use Glpi\Event;

// autoload include in objecttask.form (tickettask, problemtask,...)
if (!defined('GLPI_ROOT')) {
    die("Sorry. You can't access this file directly");
}
Session::checkCentralAccess();

if (!($task instanceof CommonITILTask)) {
    Html::displayErrorAndDie('');
}
if (!$task->canView()) {
    Html::displayRightError();
}

$itemtype = $task->getItilObjectItemType();
$fk       = getForeignKeyFieldForItemType($itemtype);

$track = new $itemtype();
$track->getFromDB($task->getField($fk));

$redirect = null;
$handled = false;

if (isset($_POST["add"])) {
    $task->check(-1, CREATE, $_POST);
    $task->add($_POST);

    Event::log(
        $task->getField($fk),
        strtolower($itemtype),
        4,
        "tracking",
        //TRANS: %s is the user login
        sprintf(__('%s adds a task'), $_SESSION["glpiname"])
    );
    $redirect = $itemtype::getFormURLWithID($task->getField($fk));
    $handled = true;
} else if (isset($_POST["purge"])) {
    $task->check($_POST['id'], PURGE);
    $task->delete($_POST, 1);

    Event::log(
        $task->getField($fk),
        strtolower($itemtype),
        4,
        "tracking",
        //TRANS: %s is the user login
        sprintf(__('%s purges a task'), $_SESSION["glpiname"])
    );
    Html::redirect($itemtype::getFormURLWithID($task->getField($fk)));
} else if (isset($_POST["update"])) {
    $task->check($_POST["id"], UPDATE);
    $task->update($_POST);

    Event::log(
        $task->getField($fk),
        strtolower($itemtype),
        4,
        "tracking",
        //TRANS: %s is the user login
        sprintf(__('%s updates a task'), $_SESSION["glpiname"])
    );
    $redirect = $itemtype::getFormURLWithID($task->getField($fk));
    $handled = true;
}

if ($handled) {
    if (isset($_POST['kb_linked_id'])) {
       //if followup should be linked to selected KB entry
        $params = [
            'knowbaseitems_id' => $_POST['kb_linked_id'],
            'itemtype'         => $itemtype,
            'items_id'         => $task->getField($fk)
        ];
        $existing = $DB->request(
            'glpi_knowbaseitems_items',
            $params
        );
        if ($existing->numrows() == 0) {
            $kb_item_item = new KnowbaseItem_Item();
            $kb_item_item->add($params);
        }
    }

    if ($track->can($task->getField($fk), READ)) {
        $toadd = '';
       // Copy followup to KB redirect to KB
        if (isset($_POST['_task_to_kb']) && $_POST['_task_to_kb']) {
            $toadd = "&_task_to_kb=" . $task->getID();
        }
        $redirect = $track->getLinkURL() . $toadd;
    } else {
        Session::addMessageAfterRedirect(
            __('You have been redirected because you no longer have access to this ticket'),
            true,
            ERROR
        );
        $redirect = $track->getSearchURL();
    }
}

if (null == $redirect) {
    Html::back();
} else {
    Html::redirect($redirect);
}

Html::displayErrorAndDie('Lost');