<?php
declare(strict_types=1);

$token = file_get_contents("token");
$token = trim($token);

try {
    # Init ILIAS
    chdir("..");
    require_once("Services/Init/classes/class.ilInitialisation.php");
    ilInitialisation::initILIAS();

    #include_once 'Services/Context/classes/class.ilContext.php';
    #ilContext::init(ilContext::CONTEXT_REST);

    header("Content-Type: application/json; charset=UTF-8");

    $method = $_SERVER['REQUEST_METHOD'];
    $curtoken = $_GET["token"];
    $command = $_GET["command"];
    $obj_id = (int) $_GET["obj_id"];
    $dry = $_GET["dry"]; # "0" = false, "1" = true


    $res = array(
        "method" => $method,
        "command" => $command,
        "obj_id" => $obj_id,
        "status" => null,
        "msg" => null
    );

    // check token
    if($token !== $curtoken) {
        http_response_code(403);
        $res["status"] = "error";
        $res["msg"] = "access denied";
        $json = json_encode($res, JSON_PRETTY_PRINT);
        echo $json;
        die(); // this ends here
    }


    try {
        switch ($command) {
            case "ping":
                if($method == "GET") {
                    $res["msg"] = "pong";
                    $res["status"] = "ok";
                    break;
                }
            case "deleteUser":
                if ($method == "DELETE") {
                    $res["msg"] = deleteUser($obj_id, $dry);
                    $res["status"] = "ok";
                    break;
                }
            case "deleteTeilnahme":
                if ($method == "DELETE") {
                    $usr_id = (int) $_GET["usr_id"];
                    $res["usr_id"] = $usr_id;
                    $res["msg"] = deleteTeilnahme($obj_id, $usr_id, $dry);
                    $res["status"] = "ok";
                    break;
                }
            default:
                http_response_code(500);
                $res["status"] = "error";
                $res["msg"] = "unknown command or method";
        }
    } catch (Exception $err) {
        http_response_code(500);
        $res["status"] = "error";
        $res["msg"] = $err->__tostring();
    }

    $json = json_encode($res, JSON_PRETTY_PRINT);
    echo $json;
} catch (Exception $ex) {
    echo $ex;
}


###############################

function deleteUser($obj_id, $dry)
{
    $usr = ilObjectFactory::getInstanceByObjId($obj_id);
    $msg = "deleted user {$usr->firstname} {$usr->lastname} ({$obj_id})";
    if ($dry == "0") {
        $usr->delete();
        return $msg;
    } else {
        $msg = "DRY:: ".$msg;
        return $msg;
    }
}

function deleteTeilnahme($obj_id, $usr_id, $dry) {
    # beim Löschen durch den Kurs wird zwar die Teilnahme gelöscht, aber nicht die Rollenzugehörigkeit
    $course = ilObjectFactory::getInstanceByObjId($obj_id);

    $parti = ilCourseParticipant::_getInstanceByObjId($obj_id, $usr_id); ## Achtung die usr_id hier ist Admin id??
    #return "parti.isParticipant() = {$parti->isParticipant()}";

    $msg = "deleted user({$usr_id}) teilnahme for course '{$course->getTitle()}' ({$obj_id})";
    if ($dry == "0") {
        #$course->_deleteUser($usr_id);
        #$course->deleteUser($usr_id); ## undefined
        $parti->delete($usr_id);
        return $msg;
    } else {
        $msg = "DRY:: ".$msg;
        return $msg;
    }
}

?>