function approve()
{
    extract($_REQUEST);
    if (!isset($approve) || $approve != "i" && $approve != "a") {
        invalid_use("<li class='err'>Invalid action.<li>");
    }
    /* order info */
    $qry = new dbSelect("recvpurch", "trh", grp(m("where", wgrp(m("id", $id)))));
    $qry->run();
    if ($qry->num_rows() <= 0) {
        invalid_use("<li class='err'>Invalid Sales Order Id (TRHAPP).</li>");
    }
    $soi = $qry->fetch_array();
    /* customer info */
    $ci = qryCustomer($soi["custid"]);
    /* sales person name */
    if (empty($ci["sales_rep"])) {
        $speoples = qrySalesPerson();
        if ($speoples->num_rows() <= 0) {
            $salespn = "General";
        } else {
            $speoples->fetch_array();
            $salespn = $speoples->d["salesp"];
            $speoples->free();
        }
    } else {
        $m = qrySalesPerson($ci["sales_rep"]);
        $salespn = $m["salesp"];
    }
    /* currency info */
    $curinfo = qryCurrency($ci["fcid"]);
    $cols = grp(m("deptid", "{$ci['deptid']}"), m("cusnum", "{$ci['cusnum']}"), m("cordno", ""), m("ordno", ""), m("chrgvat", $soi["vatinc"] == "yes" ? "inc" : "no"), m("terms", "{$ci['credterm']}"), m("salespn", $salespn), m("odate", "{$soi['pdate']}"), m("accepted", "n"), m("comm", ""), m("done", "y"), m("username", USER_NAME), m("deptname", "{$ci['deptname']}"), m("cusacc", "{$ci['accno']}"), m("cusname", "{$ci['cusname']}"), m("surname", "{$ci['surname']}"), m("cusaddr", "{$ci['addr1']}"), m("cusordno", "{$soi['purnum']}"), m("cusvatno", "{$ci['vatnum']}"), m("prd", "0"), m("div", USER_DIV), m("disc", "0.00"), m("discp", "0.00"), m("delchrg", "{$soi['shipchrg']}"), m("subtot", "{$soi['subtot']}"), m("traddisc", "0.00"), m("balance", "{$soi['balance']}"), m("vat", "{$soi['vat']}"), m("total", "{$soi['total']}"), m("jobid", "0"), m("jobnum", "0"), m("dir", ""), m("location", ""), m("fcid", "{$ci['fcid']}"), m("currency", "{$curinfo['symbol']}"), m("xrate", "{$curinfo['rate']}"), m("fbalance", "0.00"), m("fsubtot", "0.00"), m("discount", "0.00"), m("delivery", "{$soi['shipchrg']}"), m("delvat", "{$soi['delvat']}"), m("display_costs", "yes"), m("proforma", "no"), m("pinvnum", "0"));
    $upd = new dbUpdate("sorders", "cubit", $cols);
    $upd->run(DB_INSERT);
    $sordid = $upd->lastvalue("sordid");
    /* items */
    $qry->reset();
    $qry->setTable("recvpurch_items");
    $qry->setOpt(grp(m("where", wgrp(m("recvpurch_id", $id)))));
    $qry->run();
    $upd->setTable("sorders_items");
    while ($row = $qry->fetch_array()) {
        if (empty($row["sup_stkcod"])) {
            invalid_use("Supplier stock codes not setup for customer. Order ignored.");
        }
        $stkinfo = qryStockC($row["sup_stkcod"]);
        $cols = grp(m("sordid", "{$sordid}"), m("whid", "{$stkinfo['whid']}"), m("stkid", "{$stkinfo['stkid']}"), m("qty", "{$row['qty']}"), m("div", USER_DIV), m("amt", "{$row['amt']}"), m("discp", "0.00"), m("disc", "0.00"), m("unitcost", "{$row['unitcost']}"), m("hidden", ""), m("funitcost", "0.00"), m("famt", "0.00"), m("pinv", "0.00"), m("vatcode", "{$stkinfo['vatcode']}"), m("description", "{$stkinfo['stkdes']}"), m("account", "0"));
        $upd->setOpt($cols);
        $upd->run(DB_INSERT);
    }
    /* set approve status */
    $upd->reset();
    $upd->setTable("recvpurch", "trh");
    $upd->setOpt(grp(m("approved", "{$approve}")), "id='{$id}'");
    $upd->run(DB_UPDATE);
    /* get customer trh config */
    $keyinfo = trhKeyCust($soi["custid"]);
    $email = $keyinfo["email"];
    /* send trh response message */
    $purinfo = array("purid" => $soi["purid"], "status" => $approve);
    $ret = send_trhmsg("cust", $soi["custid"], $email, "rsppur", $purinfo);
    if ($approve == "i") {
        header("Location: ../sorder-accept.php?sordid={$sordid}");
        exit;
    } else {
        $OUT = listorders("<li class='err'>Successfully approved sales order.</li>");
    }
    return $OUT;
}