Create Product Receipt on Purchase Order

static void makPurchPackingSlipPost(Args _args)
{
    PurchFormLetter             purchFormLetter;
    PurchFormletterParmData     purchFormLetterParmData;
    PurchParmUpdate             purchParmUpdate;
    PurchParmTable              purchParmTable;
    PurchParmLine               purchParmLine;
    PurchTable                  purchTable;
    PurchLine                   purchLine;
    PurchId                     purchId;
    Num                         packingSlipId;

    purchId       = "00001";
    packingSlipId = "PACK-0001";
    purchTable    = PurchTable::find(purchId);

    ttsBegin;
    // Create PurchParamUpdate table
    purchFormLetterParmData = PurchFormletterParmData::newData(
        DocumentStatus::PackingSlip,
        VersioningUpdateType::Initial);
    
    purchFormLetterParmData.parmOnlyCreateParmUpdate(true);
    purchFormLetterParmData.createData(false);
    purchParmUpdate = purchFormLetterParmData.parmParmUpdate();

    // Set PurchParmTable table
    purchParmTable.clear();
    purchParmTable.TransDate                = SystemDateGet();
    purchParmTable.Ordering                 = DocumentStatus::PackingSlip;
    purchParmTable.ParmJobStatus            = ParmJobStatus::Waiting;
    purchParmTable.Num                      = packingSlipId;
    purchParmTable.PurchId                  = purchTable.PurchId;
    purchParmTable.PurchName                = purchTable.PurchName;
    purchParmTable.DeliveryName             = purchTable.DeliveryName;
    purchParmTable.DeliveryPostalAddress    = purchTable.DeliveryPostalAddress;
    purchParmTable.OrderAccount             = purchTable.OrderAccount;
    purchParmTable.CurrencyCode             = purchTable.CurrencyCode;
    purchParmTable.InvoiceAccount           = purchTable.InvoiceAccount;
    purchParmTable.ParmId                   = purchParmUpdate.ParmId;
    purchParmTable.insert();

    // Set PurchParmLine table
    while select purchLine
        where purchLine.PurchId == purchTable.purchId
    {
        purchParmLine.InitFromPurchLine(purchLine);

        purchParmLine.ReceiveNow    = PurchLine.PurchQty;
        purchParmLine.ParmId        = purchParmTable.ParmId;
        purchParmLine.TableRefId    = purchParmTable.TableRefId;
        purchParmLine.setQty(DocumentStatus::PackingSlip, false, true);
        purchParmLine.setLineAmount();
        purchParmLine.insert();
    }

    purchFormLetter = PurchFormLetter::construct(DocumentStatus::PackingSlip);
    purchFormLetter.transDate(systemDateGet());
    purchFormLetter.proforma(false);
    purchFormLetter.specQty(PurchUpdate::All);
    purchFormLetter.purchTable(purchTable);
    
    // This is the ID we hard code as the product receipt ID, if we do the posting via UI
    // user would have the option to manually enter this value
    purchFormLetter.parmParmTableNum(purchParmTable.ParmId);
    purchFormLetter.parmId(purchParmTable.ParmId);
    purchFormLetter.purchParmUpdate(purchFormLetterParmData.parmParmUpdate());
    purchFormLetter.run();
    ttsCommit;
}