public function actionIndex($id)
{
$thread = Tree::findOne((int) $id);
if (!$thread) {
return $this->redirect('/');
}
$tree = new Tree();
$data = $tree->buildTree($thread);
return $this->render('index', ['jsonString' => $data, 'id' => $id]);
}
/**
* generate tree
* @param $count
* @param null $parent_id
*/
public function generateTree($count, $parent_id = null)
{
$tree = Yii::$app->mongodb->getCollection('tree');
if ($parent_id) {
$thread = Tree::findOne($parent_id);
$key = $thread->right_key;
$level = $thread->level + 1;
} else {
$key = Tree::find()->max('right_key');
$key++;
$level = 0;
}
$id = $this->getLastId();
for ($i = 0; $i < $count; $i++, $id++, $key += 2) {
if ($parent_id) {
$tree->update(['left_key' => ['$gt' => $key]], ['$inc' => ['right_key' => 2, 'left_key' => 2]]);
$tree->update(['right_key' => ['$gte' => $key], 'left_key' => ['$lt' => $key]], ['$inc' => ['right_key' => 2]]);
}
$tree->insert(['left_key' => $key, 'right_key' => $key + 1, 'name' => $id, 'level' => $level, '_id' => $id]);
}
}
