public function get_ready_to_display_tree($root = self::root_id, $json = false, $depth = false, $load_data = true)
{
$ready_to_display_tree = array();
if ($this->tree_is_empty()) {
return $json ? json_encode($ready_to_display_tree) : $ready_to_display_tree;
}
//TODO: handle any $depth...
if ($depth !== false) {
switch ($depth) {
case 0:
$this->tree_state->fold_node($root);
$this->save();
break;
case 1:
$direct_children = $this->apm_tree->get_children($root);
if (!empty($direct_children)) {
$this->tree_state->fold_nodes($direct_children);
$this->save();
}
break;
}
}
$unfolded_nodes = $this->tree_state->get_unfolded_nodes($this->apm_tree->get_nodes_flat($root));
$root_depth = $this->apm_tree->get_node_depth($root);
//Retrieve visible nodes from APM tree (this may retrieve nodes that don't exist in WP database,
//if deleted from outside the plugin)
$tree_to_display = $this->apm_tree->get_ready_to_display_tree($root, $root_depth, false, $unfolded_nodes);
$apm_ids_to_display = array_keys($tree_to_display);
if ($load_data) {
//Load Wordpress data just before display, to be sure to load only necessary data:
$this->nodes_data->load_multiple($apm_ids_to_display);
//Now, $this->nodes_data contains only nodes that really exist as WP pages.
//However, they may have the 'auto-draft' or 'trash' status.
}
//Retrieve number of first level node to know if we can move nodes :
//A node is movable only if : depth > 1 OR (depth == 1 AND there is other nodes with depth == 1)
$nb_first_level_nodes = $this->get_apm_tree_nb_nodes(true);
//We loop on the nodes existing in our APM tree so that we can warn about pages that
//exist in APM tree and not in WP tree (deleted from outside the plugin) :
foreach ($tree_to_display as $apm_id => $node_tree_infos) {
$node_data = $this->nodes_data->get($apm_id);
//A node exists in APM tree but not in WP : set special data to warn about it :
if (empty($node_data)) {
$node_data = new ApmNodeDataDisplay();
$node_data->set_intern_data(new ApmNodeDataIntern(array('apm_id' => $apm_id, 'type' => 'page', 'wp_id' => $apm_id)));
$node_data->set_node_is_not_in_wp();
}
$node_data->set_node_position(array('depth' => $node_tree_infos['depth'], 'parent' => $node_tree_infos['parent'], 'children' => $node_tree_infos['children'], 'nb_children' => $node_tree_infos['nb_children']));
$is_folded = $node_tree_infos['nb_children'] > 0 && !in_array($apm_id, $unfolded_nodes);
$node_data->set_is_folded($is_folded);
$node_data->set_is_movable($node_tree_infos['depth'] > 1 || $nb_first_level_nodes > 1);
$ready_to_display_tree[$apm_id] = $json ? $node_data->get_flattened() : $node_data;
}
return $json ? json_encode($ready_to_display_tree) : $ready_to_display_tree;
}