false,
"parent_id" => false,
"position" => false,
"left" => false,
"right" => false,
"level" => false
);
// Constructor
function __construct($table = "tree", $fields = array()) {
$this->table = $table;
if(!count($fields)) {
foreach($this->fields as $k => &$v) { $v = $k; }
}
else {
foreach($fields as $key => $field) {
switch($key) {
case "id":
case "parent_id":
case "position":
case "left":
case "right":
case "level":
$this->fields[$key] = $field;
break;
}
}
}
// Database
$this->db = new _database;
}
function _get_node($id) {
$this->db->query("SELECT `".implode("` , `", $this->fields)."` FROM `".$this->table."` WHERE `".$this->fields["id"]."` = ".(int) $id);
$this->db->nextr();
return $this->db->nf() === 0 ? false : $this->db->get_row("assoc");
}
function _get_children($id, $recursive = false) {
$children = array();
if($recursive) {
$node = $this->_get_node($id);
$this->db->query("SELECT `".implode("` , `", $this->fields)."` FROM `".$this->table."` WHERE `".$this->fields["left"]."` >= ".(int) $node[$this->fields["left"]]." AND `".$this->fields["right"]."` <= ".(int) $node[$this->fields["right"]]." ORDER BY `".$this->fields["left"]."` ASC");
}
else {
$this->db->query("SELECT `".implode("` , `", $this->fields)."` FROM `".$this->table."` WHERE `".$this->fields["parent_id"]."` = ".(int) $id." ORDER BY `".$this->fields["position"]."` ASC");
}
while($this->db->nextr()) $children[$this->db->f($this->fields["id"])] = $this->db->get_row("assoc");
return $children;
}
function _get_path($id) {
$node = $this->_get_node($id);
$path = array();
if(!$node === false) return false;
$this->db->query("SELECT `".implode("` , `", $this->fields)."` FROM `".$this->table."` WHERE `".$this->fields["left"]."` <= ".(int) $node[$this->fields["left"]]." AND `".$this->fields["right"]."` >= ".(int) $node[$this->fields["right"]]);
while($this->db->nextr()) $path[$this->db->f($this->fields["id"])] = $this->db->get_row("assoc");
return $path;
}
function _create($parent, $position) {
return $this->_move(0, $parent, $position);
}
function _remove($id) {
if((int)$id === 1) { return false; }
$data = $this->_get_node($id);
$lft = (int)$data[$this->fields["left"]];
$rgt = (int)$data[$this->fields["right"]];
$dif = $rgt - $lft + 1;
// deleting node and its children
$this->db->query("" .
"DELETE FROM `".$this->table."` " .
"WHERE `".$this->fields["left"]."` >= ".$lft." AND `".$this->fields["right"]."` <= ".$rgt
);
// shift left indexes of nodes right of the node
$this->db->query("".
"UPDATE `".$this->table."` " .
"SET `".$this->fields["left"]."` = `".$this->fields["left"]."` - ".$dif." " .
"WHERE `".$this->fields["left"]."` > ".$rgt
);
// shift right indexes of nodes right of the node and the node's parents
$this->db->query("" .
"UPDATE `".$this->table."` " .
"SET `".$this->fields["right"]."` = `".$this->fields["right"]."` - ".$dif." " .
"WHERE `".$this->fields["right"]."` > ".$lft
);
$pid = (int)$data[$this->fields["parent_id"]];
$pos = (int)$data[$this->fields["position"]];
// Update position of siblings below the deleted node
$this->db->query("" .
"UPDATE `".$this->table."` " .
"SET `".$this->fields["position"]."` = `".$this->fields["position"]."` - 1 " .
"WHERE `".$this->fields["parent_id"]."` = ".$pid." AND `".$this->fields["position"]."` > ".$pos
);
return true;
}
function _move($id, $ref_id, $position = 0, $is_copy = false) {
if((int)$ref_id === 0 || (int)$id === 1) { return false; }
$sql = array(); // Queries executed at the end
$node = $this->_get_node($id); // Node data
$nchildren = $this->_get_children($id); // Node children
$ref_node = $this->_get_node($ref_id); // Ref node data
$rchildren = $this->_get_children($ref_id);// Ref node children
$ndif = 2;
$node_ids = array(-1);
if($node !== false) {
$node_ids = array_keys($this->_get_children($id, true));
// TODO: should be !$is_copy && , but if copied to self - screws some right indexes
if(in_array($ref_id, $node_ids)) return false;
$ndif = $node[$this->fields["right"]] - $node[$this->fields["left"]] + 1;
}
if($position >= count($rchildren)) {
$position = count($rchildren);
}
// Not creating or copying - old parent is cleaned
if($node !== false && $is_copy == false) {
$sql[] = "" .
"UPDATE `".$this->table."` " .
"SET `".$this->fields["position"]."` = `".$this->fields["position"]."` - 1 " .
"WHERE " .
"`".$this->fields["parent_id"]."` = ".$node[$this->fields["parent_id"]]." AND " .
"`".$this->fields["position"]."` > ".$node[$this->fields["position"]];
$sql[] = "" .
"UPDATE `".$this->table."` " .
"SET `".$this->fields["left"]."` = `".$this->fields["left"]."` - ".$ndif." " .
"WHERE `".$this->fields["left"]."` > ".$node[$this->fields["right"]];
$sql[] = "" .
"UPDATE `".$this->table."` " .
"SET `".$this->fields["right"]."` = `".$this->fields["right"]."` - ".$ndif." " .
"WHERE " .
"`".$this->fields["right"]."` > ".$node[$this->fields["left"]]." AND " .
"`".$this->fields["id"]."` NOT IN (".implode(",", $node_ids).") ";
}
// Preparing new parent
$sql[] = "" .
"UPDATE `".$this->table."` " .
"SET `".$this->fields["position"]."` = `".$this->fields["position"]."` + 1 " .
"WHERE " .
"`".$this->fields["parent_id"]."` = ".$ref_id." AND " .
"`".$this->fields["position"]."` >= ".$position." " .
( $is_copy ? "" : " AND `".$this->fields["id"]."` NOT IN (".implode(",", $node_ids).") ");
$ref_ind = $ref_id === 0 ? (int)$rchildren[count($rchildren) - 1][$this->fields["right"]] + 1 : (int)$ref_node[$this->fields["right"]];
$ref_ind = max($ref_ind, 1);
$self = ($node !== false && !$is_copy && (int)$node[$this->fields["parent_id"]] == $ref_id && $position > $node[$this->fields["position"]]) ? 1 : 0;
foreach($rchildren as $k => $v) {
if($v[$this->fields["position"]] - $self == $position) {
$ref_ind = (int)$v[$this->fields["left"]];
break;
}
}
if($node !== false && !$is_copy && $node[$this->fields["left"]] < $ref_ind) {
$ref_ind -= $ndif;
}
$sql[] = "" .
"UPDATE `".$this->table."` " .
"SET `".$this->fields["left"]."` = `".$this->fields["left"]."` + ".$ndif." " .
"WHERE " .
"`".$this->fields["left"]."` >= ".$ref_ind." " .
( $is_copy ? "" : " AND `".$this->fields["id"]."` NOT IN (".implode(",", $node_ids).") ");
$sql[] = "" .
"UPDATE `".$this->table."` " .
"SET `".$this->fields["right"]."` = `".$this->fields["right"]."` + ".$ndif." " .
"WHERE " .
"`".$this->fields["right"]."` >= ".$ref_ind." " .
( $is_copy ? "" : " AND `".$this->fields["id"]."` NOT IN (".implode(",", $node_ids).") ");
$ldif = $ref_id == 0 ? 0 : $ref_node[$this->fields["level"]] + 1;
$idif = $ref_ind;
if($node !== false) {
$ldif = $node[$this->fields["level"]] - ($ref_node[$this->fields["level"]] + 1);
$idif = $node[$this->fields["left"]] - $ref_ind;
if($is_copy) {
$sql[] = "" .
"INSERT INTO `".$this->table."` (" .
"`".$this->fields["parent_id"]."`, " .
"`".$this->fields["position"]."`, " .
"`".$this->fields["left"]."`, " .
"`".$this->fields["right"]."`, " .
"`".$this->fields["level"]."`" .
") " .
"SELECT " .
"".$ref_id.", " .
"`".$this->fields["position"]."`, " .
"`".$this->fields["left"]."` - (".($idif + ($node[$this->fields["left"]] >= $ref_ind ? $ndif : 0))."), " .
"`".$this->fields["right"]."` - (".($idif + ($node[$this->fields["left"]] >= $ref_ind ? $ndif : 0))."), " .
"`".$this->fields["level"]."` - (".$ldif.") " .
"FROM `".$this->table."` " .
"WHERE " .
"`".$this->fields["id"]."` IN (".implode(",", $node_ids).") " .
"ORDER BY `".$this->fields["level"]."` ASC";
}
else {
$sql[] = "" .
"UPDATE `".$this->table."` SET " .
"`".$this->fields["parent_id"]."` = ".$ref_id.", " .
"`".$this->fields["position"]."` = ".$position." " .
"WHERE " .
"`".$this->fields["id"]."` = ".$id;
$sql[] = "" .
"UPDATE `".$this->table."` SET " .
"`".$this->fields["left"]."` = `".$this->fields["left"]."` - (".$idif."), " .
"`".$this->fields["right"]."` = `".$this->fields["right"]."` - (".$idif."), " .
"`".$this->fields["level"]."` = `".$this->fields["level"]."` - (".$ldif.") " .
"WHERE " .
"`".$this->fields["id"]."` IN (".implode(",", $node_ids).") ";
}
}
else {
$sql[] = "" .
"INSERT INTO `".$this->table."` (" .
"`".$this->fields["parent_id"]."`, " .
"`".$this->fields["position"]."`, " .
"`".$this->fields["left"]."`, " .
"`".$this->fields["right"]."`, " .
"`".$this->fields["level"]."` " .
") " .
"VALUES (" .
$ref_id.", " .
$position.", " .
$idif.", " .
($idif + 1).", " .
$ldif.
")";
}
foreach($sql as $q) { $this->db->query($q); }
$ind = $this->db->insert_id();
if($is_copy) $this->_fix_copy($ind, $position);
return $node === false || $is_copy ? $ind : true;
}
function _fix_copy($id, $position) {
$node = $this->_get_node($id);
$children = $this->_get_children($id, true);
$map = array();
for($i = $node[$this->fields["left"]] + 1; $i < $node[$this->fields["right"]]; $i++) {
$map[$i] = $id;
}
foreach($children as $cid => $child) {
if((int)$cid == (int)$id) {
$this->db->query("UPDATE `".$this->table."` SET `".$this->fields["position"]."` = ".$position." WHERE `".$this->fields["id"]."` = ".$cid);
continue;
}
$this->db->query("UPDATE `".$this->table."` SET `".$this->fields["parent_id"]."` = ".$map[(int)$child[$this->fields["left"]]]." WHERE `".$this->fields["id"]."` = ".$cid);
for($i = $child[$this->fields["left"]] + 1; $i < $child[$this->fields["right"]]; $i++) {
$map[$i] = $cid;
}
}
}
function _reconstruct() {
$this->db->query("" .
"CREATE TEMPORARY TABLE `temp_tree` (" .
"`".$this->fields["id"]."` INTEGER NOT NULL, " .
"`".$this->fields["parent_id"]."` INTEGER NOT NULL, " .
"`". $this->fields["position"]."` INTEGER NOT NULL" .
") type=HEAP"
);
$this->db->query("" .
"INSERT INTO `temp_tree` " .
"SELECT " .
"`".$this->fields["id"]."`, " .
"`".$this->fields["parent_id"]."`, " .
"`".$this->fields["position"]."` " .
"FROM `".$this->table."`"
);
$this->db->query("" .
"CREATE TEMPORARY TABLE `temp_stack` (" .
"`".$this->fields["id"]."` INTEGER NOT NULL, " .
"`".$this->fields["left"]."` INTEGER, " .
"`".$this->fields["right"]."` INTEGER, " .
"`".$this->fields["level"]."` INTEGER, " .
"`stack_top` INTEGER NOT NULL, " .
"`".$this->fields["parent_id"]."` INTEGER, " .
"`".$this->fields["position"]."` INTEGER " .
") type=HEAP"
);
$counter = 2;
$this->db->query("SELECT COUNT(*) FROM temp_tree");
$this->db->nextr();
$maxcounter = (int) $this->db->f(0) * 2;
$currenttop = 1;
$this->db->query("" .
"INSERT INTO `temp_stack` " .
"SELECT " .
"`".$this->fields["id"]."`, " .
"1, " .
"NULL, " .
"0, " .
"1, " .
"`".$this->fields["parent_id"]."`, " .
"`".$this->fields["position"]."` " .
"FROM `temp_tree` " .
"WHERE `".$this->fields["parent_id"]."` = 0"
);
$this->db->query("DELETE FROM `temp_tree` WHERE `".$this->fields["parent_id"]."` = 0");
while ($counter <= $maxcounter) {
$this->db->query("" .
"SELECT " .
"`temp_tree`.`".$this->fields["id"]."` AS tempmin, " .
"`temp_tree`.`".$this->fields["parent_id"]."` AS pid, " .
"`temp_tree`.`".$this->fields["position"]."` AS lid " .
"FROM `temp_stack`, `temp_tree` " .
"WHERE " .
"`temp_stack`.`".$this->fields["id"]."` = `temp_tree`.`".$this->fields["parent_id"]."` AND " .
"`temp_stack`.`stack_top` = ".$currenttop." " .
"ORDER BY `temp_tree`.`".$this->fields["position"]."` ASC LIMIT 1"
);
if ($this->db->nextr()) {
$tmp = $this->db->f("tempmin");
$q = "INSERT INTO temp_stack (stack_top, `".$this->fields["id"]."`, `".$this->fields["left"]."`, `".$this->fields["right"]."`, `".$this->fields["level"]."`, `".$this->fields["parent_id"]."`, `".$this->fields["position"]."`) VALUES(".($currenttop + 1).", ".$tmp.", ".$counter.", NULL, ".$currenttop.", ".$this->db->f("pid").", ".$this->db->f("lid").")";
$this->db->query($q);
$this->db->query("DELETE FROM `temp_tree` WHERE `".$this->fields["id"]."` = ".$tmp);
$counter++;
$currenttop++;
}
else {
$this->db->query("" .
"UPDATE temp_stack SET " .
"`".$this->fields["right"]."` = ".$counter.", " .
"`stack_top` = -`stack_top` " .
"WHERE `stack_top` = ".$currenttop
);
$counter++;
$currenttop--;
}
}
$temp_fields = $this->fields;
unset($temp_fields["parent_id"]);
unset($temp_fields["position"]);
unset($temp_fields["left"]);
unset($temp_fields["right"]);
unset($temp_fields["level"]);
if(count($temp_fields) > 1) {
$this->db->query("" .
"CREATE TEMPORARY TABLE `temp_tree2` " .
"SELECT `".implode("`, `", $temp_fields)."` FROM `".$this->table."` "
);
}
$this->db->query("TRUNCATE TABLE `".$this->table."`");
$this->db->query("" .
"INSERT INTO ".$this->table." (" .
"`".$this->fields["id"]."`, " .
"`".$this->fields["parent_id"]."`, " .
"`".$this->fields["position"]."`, " .
"`".$this->fields["left"]."`, " .
"`".$this->fields["right"]."`, " .
"`".$this->fields["level"]."` " .
") " .
"SELECT " .
"`".$this->fields["id"]."`, " .
"`".$this->fields["parent_id"]."`, " .
"`".$this->fields["position"]."`, " .
"`".$this->fields["left"]."`, " .
"`".$this->fields["right"]."`, " .
"`".$this->fields["level"]."` " .
"FROM temp_stack " .
"ORDER BY `".$this->fields["id"]."`"
);
if(count($temp_fields) > 1) {
$sql = "" .
"UPDATE `".$this->table."` v, `temp_tree2` SET v.`".$this->fields["id"]."` = v.`".$this->fields["id"]."` ";
foreach($temp_fields as $k => $v) {
if($k == "id") continue;
$sql .= ", v.`".$v."` = `temp_tree2`.`".$v."` ";
}
$sql .= " WHERE v.`".$this->fields["id"]."` = `temp_tree2`.`".$this->fields["id"]."` ";
$this->db->query($sql);
}
}
function _analyze() {
$report = array();
$this->db->query("" .
"SELECT " .
"`".$this->fields["left"]."` FROM `".$this->table."` s " .
"WHERE " .
"`".$this->fields["parent_id"]."` = 0 "
);
$this->db->nextr();
if($this->db->nf() == 0) {
$report[] = "[FAIL]\tNo root node.";
}
else {
$report[] = ($this->db->nf() > 1) ? "[FAIL]\tMore than one root node." : "[OK]\tJust one root node.";
}
$report[] = ($this->db->f(0) != 1) ? "[FAIL]\tRoot node's left index is not 1." : "[OK]\tRoot node's left index is 1.";
$this->db->query("" .
"SELECT " .
"COUNT(*) FROM `".$this->table."` s " .
"WHERE " .
"`".$this->fields["parent_id"]."` != 0 AND " .
"(SELECT COUNT(*) FROM `".$this->table."` WHERE `".$this->fields["id"]."` = s.`".$this->fields["parent_id"]."`) = 0 ");
$this->db->nextr();
$report[] = ($this->db->f(0) > 0) ? "[FAIL]\tMissing parents." : "[OK]\tNo missing parents.";
$this->db->query("SELECT MAX(`".$this->fields["right"]."`) FROM `".$this->table."`");
$this->db->nextr();
$n = $this->db->f(0);
$this->db->query("SELECT COUNT(*) FROM `".$this->table."`");
$this->db->nextr();
$c = $this->db->f(0);
$report[] = ($n/2 != $c) ? "[FAIL]\tRight index does not match node count." : "[OK]\tRight index matches count.";
$this->db->query("" .
"SELECT COUNT(`".$this->fields["id"]."`) FROM `".$this->table."` s " .
"WHERE " .
"(SELECT COUNT(*) FROM `".$this->table."` WHERE " .
"`".$this->fields["right"]."` < s.`".$this->fields["right"]."` AND " .
"`".$this->fields["left"]."` > s.`".$this->fields["left"]."` AND " .
"`".$this->fields["level"]."` = s.`".$this->fields["level"]."` + 1" .
") != " .
"(SELECT COUNT(*) FROM `".$this->table."` WHERE " .
"`".$this->fields["parent_id"]."` = s.`".$this->fields["id"]."`" .
") "
);
$this->db->nextr();
$report[] = ($this->db->f(0) > 0) ? "[FAIL]\tAdjacency and nested set do not match." : "[OK]\tNS and AJ match";
return implode("
",$report);
}
function _dump($output = false) {
$nodes = array();
$this->db->query("SELECT * FROM ".$this->table." ORDER BY `".$this->fields["left"]."`");
while($this->db->nextr()) $nodes[] = $this->db->get_row("assoc");
if($output) {
echo "";
foreach($nodes as $node) {
echo str_repeat(" ",(int)$node[$this->fields["level"]] * 2);
echo $node[$this->fields["id"]]." (".$node[$this->fields["left"]].",".$node[$this->fields["right"]].",".$node[$this->fields["level"]].",".$node[$this->fields["parent_id"]].",".$node[$this->fields["position"]].")
";
}
echo str_repeat("-",40);
echo "";
}
return $nodes;
}
function _drop() {
$this->db->query("TRUNCATE TABLE `".$this->table."`");
$this->db->query("" .
"INSERT INTO `".$this->table."` (" .
"`".$this->fields["id"]."`, " .
"`".$this->fields["parent_id"]."`, " .
"`".$this->fields["position"]."`, " .
"`".$this->fields["left"]."`, " .
"`".$this->fields["right"]."`, " .
"`".$this->fields["level"]."` " .
") " .
"VALUES (" .
"1, " .
"0, " .
"0, " .
"1, " .
"2, " .
"0 ".
")");
}
}
class json_tree extends _tree_struct {
function __construct($table = "tree", $fields = array(), $add_fields = array("title" => "title", "type" => "type")) {
parent::__construct($table, $fields);
$this->fields = array_merge($this->fields, $add_fields);
$this->add_fields = $add_fields;
}
function create_node($data) {
$id = parent::_create((int)$data[$this->fields["id"]], (int)$data[$this->fields["position"]]);
if($id) {
$data["id"] = $id;
$this->set_data($data);
return "{ \"status\" : 1, \"id\" : ".(int)$id." }";
}
return "{ \"status\" : 0 }";
}
function set_data($data) {
if(count($this->add_fields) == 0) { return "{ \"status\" : 1 }"; }
$s = "UPDATE `".$this->table."` SET `".$this->fields["id"]."` = `".$this->fields["id"]."` ";
foreach($this->add_fields as $k => $v) {
if(isset($data[$k])) $s .= ", `".$this->fields[$v]."` = \"".$this->db->escape($data[$k])."\" ";
else $s .= ", `".$this->fields[$v]."` = `".$this->fields[$v]."` ";
}
$s .= "WHERE `".$this->fields["id"]."` = ".(int)$data["id"];
$this->db->query($s);
return "{ \"status\" : 1 }";
}
function rename_node($data) { return $this->set_data($data); }
function move_node($data) {
$id = parent::_move((int)$data["id"], (int)$data["ref"], (int)$data["position"], (int)$data["copy"]);
if(!$id) return "{ \"status\" : 0 }";
if((int)$data["copy"] && count($this->add_fields)) {
$ids = array_keys($this->_get_children($id, true));
$data = $this->_get_children((int)$data["id"], true);
$i = 0;
foreach($data as $dk => $dv) {
$s = "UPDATE `".$this->table."` SET `".$this->fields["id"]."` = `".$this->fields["id"]."` ";
foreach($this->add_fields as $k => $v) {
if(isset($dv[$k])) $s .= ", `".$this->fields[$v]."` = \"".$this->db->escape($dv[$k])."\" ";
else $s .= ", `".$this->fields[$v]."` = `".$this->fields[$v]."` ";
}
$s .= "WHERE `".$this->fields["id"]."` = ".$ids[$i];
$this->db->query($s);
$i++;
}
}
return "{ \"status\" : 1, \"id\" : ".$id." }";
}
function remove_node($data) {
$id = parent::_remove((int)$data["id"]);
return "{ \"status\" : 1 }";
}
function get_children($data) {
$tmp = $this->_get_children((int)$data["id"]);
if((int)$data["id"] === 1 && count($tmp) === 0) {
$this->_create_default();
$tmp = $this->_get_children((int)$data["id"]);
}
$result = array();
if((int)$data["id"] === 0) return json_encode($result);
foreach($tmp as $k => $v) {
$result[] = array(
"attr" => array("id" => "node_".$k, "rel" => $v[$this->fields["type"]]),
"data" => $v[$this->fields["title"]],
"state" => ((int)$v[$this->fields["right"]] - (int)$v[$this->fields["left"]] > 1) ? "closed" : ""
);
}
return json_encode($result);
}
function search($data) {
$this->db->query("SELECT `".$this->fields["left"]."`, `".$this->fields["right"]."` FROM `".$this->table."` WHERE `".$this->fields["title"]."` LIKE '%".$this->db->escape($data["search_str"])."%'");
if($this->db->nf() === 0) return "[]";
$q = "SELECT DISTINCT `".$this->fields["id"]."` FROM `".$this->table."` WHERE 0 ";
while($this->db->nextr()) {
$q .= " OR (`".$this->fields["left"]."` < ".(int)$this->db->f(0)." AND `".$this->fields["right"]."` > ".(int)$this->db->f(1).") ";
}
$result = array();
$this->db->query($q);
while($this->db->nextr()) { $result[] = "#node_".$this->db->f(0); }
return json_encode($result);
}
function _create_default() {
$this->_drop();
$this->create_node(array(
"id" => 1,
"position" => 0,
"title" => "C:",
"type" => "drive"
));
$this->create_node(array(
"id" => 1,
"position" => 1,
"title" => "D:",
"type" => "drive"
));
$this->create_node(array(
"id" => 2,
"position" => 0,
"title" => "_demo",
"type" => "folder"
));
$this->create_node(array(
"id" => 2,
"position" => 1,
"title" => "_docs",
"type" => "folder"
));
$this->create_node(array(
"id" => 4,
"position" => 0,
"title" => "index.html",
"type" => "default"
));
$this->create_node(array(
"id" => 5,
"position" => 1,
"title" => "doc.html",
"type" => "default"
));
}
}
?>