* @param json $data The JSON encoded data from the tree
*
* @package modx
* @subpackage processors.layout.tree.element
*/
if (!$modx->hasPermission('element_tree')) {
return $modx->error->failure($modx->lexicon('permission_denied'));
}
$modx->lexicon->load('category');
$data = urldecode($scriptProperties['data']);
$data = $modx->fromJSON($data);
sortNodes($modx, 'modTemplate', 'template', $data);
sortNodes($modx, 'modTemplateVar', 'tv', $data);
sortNodes($modx, 'modChunk', 'chunk', $data);
sortNodes($modx, 'modSnippet', 'snippet', $data);
sortNodes($modx, 'modPlugin', 'plugin', $data);
if (!empty($data['n_category']) && is_array($data['n_category'])) {
/* if dropping an element onto a category, do that here */
foreach ($data['n_category'] as $key => $elements) {
if (!is_array($elements) || empty($elements)) {
continue;
}
$key = explode('_', $key);
if (empty($key[1]) || empty($key[2]) || $key[1] != 'category') {
continue;
}
foreach ($elements as $elKey => $elArray) {
$elKey = explode('_', $elKey);
if (empty($elKey[1]) || empty($elKey[3])) {
continue;
}
/**
* function runAstar
*
* traverse the grid useing the A* algorithm
*
* @param Grid $grid will hold the map of the world we are searching
* @param int $start_row the row of the start node
* @param int $start_col the col of the start node
* @param int $goal_row the row of the goal node
* @param int $goal_col the col of the goal node
* @param int $max_row the last row index
* @param int $max_col the last col index
* @return bool true if path exsit, false otherwise
*/
function runAstar($grid, $start_row, $start_col, $goal_row, $goal_col, $max_row, $max_col)
{
//initialize the open list
$open_list = array();
//initialize the closed list
$close_list = array();
$b_end_search = false;
//if true we must end the search
$goal_node =& $grid->nodes[$goal_row][$goal_col];
$start_node =& $grid->nodes[$start_row][$start_col];
$start_node->f = 0;
$open_list[] =& $start_node;
sortNodes($open_list, 'ASCE');
//while the open list is not empty
while (!empty($open_list)) {
$q = null;
//current_node
//find the node with the least f on the open list, call it "q"
//pop q off the open list
sortNodes($open_list, 'ASCE');
pop($open_list, 0, $q);
//generate q's 8 successors and set their parents to q
$successors = findSuccessors($grid->nodes, $q->row, $q->col, $max_row, $max_col);
foreach ($successors as $key => $successor) {
$temp = clone $successor;
$temp->parent_node =& $q;
//if the successor is an obstacle
if (isObstacle($temp)) {
continue;
// skip this successor if it is an obstacle
}
if (isGoal($temp, $goal_node)) {
$successor->parent_node = $temp->parent_node;
$b_end_search = true;
break;
}
$temp->g = $q->g + 1;
//
$temp->h = sqrt(pow($goal_node->row - $temp->row, 2) + pow($goal_node->col - $temp->col, 2));
$temp->f = $temp->g + $temp->h;
//
// $successor->g = $q->g + 1; //
// $successor->h = sqrt(pow(($goal_node->row - $successor->row), 2) + pow(($goal_node->col - $successor->col), 2));
// $successor->f = $successor->g + $successor->h;
//does exist in open list
if (doesExist($successor, $open_list) && $successor->f < $temp->f) {
continue;
}
//does exist in close list
if (doesExist($successor, $close_list) && $successor->f < $temp->f) {
continue;
}
//
$successor->parent_node = $temp->parent_node;
$successor->g = $temp->g;
$successor->h = $temp->h;
$successor->f = $temp->f;
$open_list[] =& $successors[$key];
//&$successor;
}
$close_list[] =& $grid->nodes[$q->row][$q->col];
//&$q;
if ($b_end_search == true) {
break;
}
}
return $b_end_search ? true : false;
//return true if there is a path, false otherwise
}