Dynamically creating documents

<?php
$userId= isset ($userId) ? $userId : $modx->getLoginUserID();
if (!$userId= intval($userId)) {
    $userId= 0;
}
$parentId= isset ($parentId) ? $parentId : $modx->documentObject['parent'];
$templateId= isset ($templateId) ? $templateId : $modx->documentObject['template'];
$formTpl= isset ($formTpl) ? $formTpl : 'xPublisher.default';

$dsn= $GLOBALS['database_type'] . ':host=' . $modx->db->config['host'] . ';dbname=' . str_replace('`', '', $modx->db->config['dbase']);

include_once ($modx->config['base_path'] . 'xpdo/xpdo.class.php');
$xpdo= new xPDO($dsn, $modx->db->config['user'], $modx->db->config['pass'], $modx->db->config['table_prefix']);
$xpdo->setPackage('modx095');
$xpdo->setLogLevel(XPDO_LOG_LEVEL_INFO);
$xpdo->setLogTarget('HTML');

$mode= 'insert';
if (isset ($_REQUEST['docId']) && $docId= intval($_REQUEST['docId']) && $document= $xpdo->getObject('modDocument', $docId)) {
    $mode= 'update';
} else {
    $docId= 0;
    $document= $xpdo->newObject('modDocument');
}

$tvCollection= array ();

if (isset ($_POST['xpublish'])) {
    $document->fromArray($_POST, 'document:');
    if ($document->save()) {
        $docId= $document->get('id');
        if ($tvCollection= $document->getMany('modTemplateVar')) {
            foreach ($tvCollection as $tvId => & $tvObj) {
                $tvObj->setValue($docId, $_POST['tv' . $tvObj->get('name') . ':value']);
                $tvObj->save();
            }
        }
        $output.= '<p class="success">Your document was successfully saved.</p>';
    } else {
        $output.= '<p class="error">There was an error while attempting to save the document.</p>';
        $xpdo->_log(XPDO_LOG_LEVEL_ERROR, "Error saving new document " . print_r($document->toArray(), true));
    }
}

$output.= "\n\n\n<form action=\"[~[*id*]~]\" method=\"post\">\n";
$output.= $modx->parseChunk($formTpl, $document->toArray('document:'), '[+', '+]');
if (empty ($tvCollection)) {
    $tvCollection= & $document->getMany('modTemplateVar');
}
if (!empty ($tvCollection)) {
    foreach ($tvCollection as $tvId => $tvObj) {
        $tvKey= 'tv' . $tvObj->get('name');
        if ($tvObj->get('type') == 'richtext' || $tvObj->get('type') == 'htmlarea') {
            if (is_array($replace_richtexteditor)) {
                $replace_richtexteditor= array_merge($replace_richtexteditor, array ($tvKey));
            } else {
                $replace_richtexteditor= array ($tvKey);
            }
        }
        $output .= "<label for=\"{$tvKey}\">{$tv['caption']}</label>\n";
        $output .= $tvObj->renderInput($docId);
        $output .= "<br />";
        $output .= "\n\n";
    }
}
$output .= "<input type=\"submit\" name=\"xpublish\" value=\"Publish\" />\n";
$output .= "<input type=\"reset\" name=\"xreset\" value=\"Reset Form\" />\n";
$output .= "</form>\n\n\n";

return $output;