public function toXML($flgContent)
{
$str = "";
//write out general lesson information
foreach ($lesson as $key => $value) {
$str .= "<{$key}>{$value}<{$key}>";
}
//write out the content tree
$contentTree = new EfrontContentTree($this->lesson['id']);
$str .= $contentTree->toXML(false);
//write out the glossary
$glossary = ef_getTableData("glossary", "*", "lessons_ID=" . $this->lessonId);
if (sizeof($glossary) > 0) {
$str .= '<glossary>';
for ($i = 0; $i < sizeof($glossary); $i++) {
$str .= '<word>';
$str .= '<name>' . $glossary[$i]['name'] . '</name>';
$str .= '<info>' . $glossary[$i]['info'] . '</info>';
$str .= '<type>' . $glossary[$i]['type'] . '</type>';
$str .= '<active>' . $glossary[$i]['active'] . '</active>';
$str .= '</word>';
}
$str .= '</glossary>';
}
//write out the lesson conditions
$conditions = ef_getTableData("lesson_conditions", "*", "lessons_ID=" . $this->lessonId);
if (sizeof($conditions) > 0) {
$str .= '<conditions>';
for ($i = 0; $i < sizeof($conditions); $i++) {
$str .= '<condition>';
$str .= '<type>' . $conditions[$i]['type'] . '</type>';
$str .= '<options>' . $conditions[$i]['options'] . '</options>';
$str .= '<relation>' . $conditions[$i]['relation'] . '</relation>';
$str .= '</condition>';
}
$str .= '</conditions>';
}
//write out the rules
$rules = ef_getTableData("rules r, content c", "r.*", "c.id = r.content_ID and c.lessons_ID=" . $this->lessonId);
if (sizeof($rules) > 0) {
$str .= '<rules>';
for ($i = 0; $i < sizeof($rules); $i++) {
$str .= "<rule>";
$str .= "<content_id>" . $rules[$i]['content_ID'] . "</content_id>";
$str .= "<rule_content_id>" . $rules[$i]['rule_content_ID'] . "</rule_content_id>";
$str .= "<rule_type>" . $rules[$i]['rule_type'] . "</rule_type>";
$str .= "<rule_option>" . $rules[$i]['rule_option'] . "</rule_option>";
$str .= '</rules>';
}
$str .= '</rules>';
}
if ($flgContent) {
//to do export the content as well
}
$xmlstr .= '<?xml version="1.0" encoding="UTF-8"?><lesson>' . $str . '</lesson>';
return $xmlstr;
}
