/**
* Get the first tree node
*
* This function returns the array corresponding to the first node in the tree.
* <br/>Example:
* <code>
* $content = new EfrontContentTree(4); //Create the content tree for lesson with id 4
* $firstNode = $content -> getFirstNode(); //$firstNode now holds the array of the tree's first node
* </code>
*
* @param ArrayIterator $iterator An specific iterator to use, instead of the default one
* @return array The first node array
* @since 3.5.0
* @access public
*/
public function getFirstNode($iterator = false)
{
// if (!$iterator) {
// $iterator = new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($this -> tree), RecursiveIteratorIterator :: SELF_FIRST)); //Create a new iterator, so that the internal iterator pointer is not reset
// }
if (!$iterator) {
if (EfrontUser::isOptionVisible('tests')) {
$iterator = new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($this->tree), RecursiveIteratorIterator::SELF_FIRST));
//Create a new iterator, so that the internal iterator pointer is not reset
} else {
$iterator = new EfrontNoTestsFilterIterator(new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($this->tree), RecursiveIteratorIterator::SELF_FIRST)));
//Create a new iterator, so that the internal iterator pointer is not reset
}
}
$iterator->rewind();
//Initialize iterator
return $iterator->current();
}
//Get to the first unseen unit
while ($firstUnseenUnit && in_array($firstUnseenUnit['id'], array_keys($seenContent))) {
$firstUnseenUnit = $currentContent->getNextNode($firstUnseenUnit, $firstNodeIterator);
}
if (!$firstUnseenUnit) {
$firstUnseenUnit = $currentContent->getFirstNode($firstNodeIterator);
}
if ($currentLesson->options['start_resume'] && $firstUnseenUnit) {
$headerOptions[] = array('text' => _RESUMELESSON, 'image' => '32x32/continue.png', 'href' => basename($_SERVER['PHP_SELF']) . '?view_unit=' . $firstUnseenUnit['id']);
}
$smarty->assign("T_CURRENT_UNIT", $firstUnseenUnit);
} else {
if (EfrontUser::isOptionVisible('tests')) {
$iterator = new EfrontVisitableFilterIterator(new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($currentContent->tree), RecursiveIteratorIterator::SELF_FIRST)));
} else {
$iterator = new EfrontNoTestsFilterIterator(new EfrontVisitableFilterIterator(new EfrontNodeFilterIterator(new RecursiveIteratorIterator(new RecursiveArrayIterator($currentContent->tree), RecursiveIteratorIterator::SELF_FIRST))));
//Create a new iterator, so that the internal iterator pointer is not reset
}
$iterator->next();
$firstUnseenUnit = $firstUnit = $iterator->current();
if ($firstUnit && $currentLesson->options['start_resume']) {
$headerOptions[] = array('text' => _STARTLESSON, 'image' => '32x32/start.png', 'href' => basename($_SERVER['PHP_SELF']) . '?ctg=content&view_unit=' . $firstUnit['id']);
}
}
if (isset($currentLesson->options['show_dashboard']) && !$currentLesson->options['show_dashboard'] && $firstUnseenUnit) {
eF_redirect("" . basename($_SERVER['PHP_SELF']) . "?ctg=content&view_unit=" . $firstUnseenUnit['id']);
}
$currentLesson->options['lesson_info'] ? $headerOptions[] = array('text' => _LESSONINFORMATION, 'image' => '32x32/information.png', 'href' => basename($_SERVER['PHP_SELF']) . '?ctg=lesson_information&popup=1', 'onClick' => "eF_js_showDivPopup(event, '" . _LESSONINFORMATION . "', 2)", 'target' => 'POPUP_FRAME') : null;
}
//Digital library mini file manager block
if ($currentLesson->options['digital_library'] && $currentUser->coreAccess['digital_library'] != 'hidden') {
