thetool/application/WarehouseShippingNote/WarehouseShippingNoteModel.php

<?php

class WarehouseShippingNoteModel extends TTCrudBaseModel {
    public int $id;
    public ?string $shippingNoteNumber = null;
    public ?int $billingAddressId;
    public ?string $type;
    public ?string $metadata;
    public string $deliveryAddressName;
    public string $deliveryAddressLine;
    public string $deliveryAddressPLZ;
    public string $deliveryAddressCity;
    public string $deliveryAddressEMail;
    public string $note;
    public string $status; // 'new'|'in_progress'|'accepted'|'invoiced' TODO: add to enum / migration
    public string $positions;
    public string $textElements;
    public string $hoursEntries;
    public ?string $signature;
    public ?string $signatureName;
    public ?string $signatureDate;
    public ?int $eShopOrderId;
    public ?int $create;
    public ?int $createBy;

    public static function generateShippingNoteNumber(): string {
        $year = date('Y');
        $prefix = "LS{$year}-X";

        $db = FronkDB::singleton();
        $result = $db->query("SELECT shippingNoteNumber FROM WarehouseShippingNote
                              WHERE shippingNoteNumber LIKE '{$prefix}%'
                              ORDER BY shippingNoteNumber DESC LIMIT 1");

        if ($row = $result->fetch_assoc()) {
            $lastNumber = intval(substr($row['shippingNoteNumber'], -4));
            $nextNumber = $lastNumber + 1;
        } else {
            $nextNumber = 1;
        }

        return $prefix . str_pad((string)$nextNumber, 4, '0', STR_PAD_LEFT);
    }
}