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<?php
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// +----------------------------------------------------------------------
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// | CoreThink [ Simple Efficient Excellent ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2014 http://www.corethink.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Author: <http://www.corethink.cn>
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// +----------------------------------------------------------------------
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namespace com;
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/**
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* 列表树生成工具类
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* 该类里的方法一部分来自OneThink,一部分来自网络,最后加上作者的修改形成完善的Tree类
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* @author
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*/
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class Tree{
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/**
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* 用于树型数组完成递归格式的全局变量
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* @author
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*/
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private $formatTree;
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/**
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* 将格式数组转换为基于标题的树(实际还是列表,只是通过在相应字段加前缀实现类似树状结构)
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* @param array $list
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* @param integer $level 进行递归时传递用的参数
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*/
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private function _toFormatTree($list, $level = 0, $title = 'label'){
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foreach($list as $key=>$val){
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$title_prefix = str_repeat(" ", $level*4);
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$val['level'] = $level;
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$val['title_show'] = $level == 0 ? $val[$title] : $title_prefix.$val[$title];
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if(!array_key_exists('_child', $val)){
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array_push($this->formatTree, $val);
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}else{
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$child = $val['_child'];
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unset($val['_child']);
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array_push($this->formatTree, $val);
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$this->_toFormatTree($child, $level+1, $title); //进行下一层递归
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}
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}
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return;
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}
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/**
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* 将格式数组转换为树
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* @param array $list
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* @param integer $level 进行递归时传递用的参数
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*/
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public function toFormatTree($list, $title = 'title', $pk='id', $pid = 'pid', $root = 0, $strict = true){
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$list = $this->list_to_tree($list, $pk, $pid, '_child', $root, $strict);
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$this->formatTree = array();
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$this->_toFormatTree($list, 0, $title);
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return $this->formatTree;
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}
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/**
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* 将数据集转换成Tree(真正的Tree结构)
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* @param array $list 要转换的数据集
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* @param string $pk ID标记字段
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* @param string $pid parent标记字段
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* @param string $child 子代key名称
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* @param string $root 返回的根节点ID
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* @param string $strict 默认严格模式
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* @param array $filter 要剔除掉的字段
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* @return array
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*/
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public function list_to_tree($list, $pk='id', $pid = 'pid', $child = 'child', $root = 0, $strict = true,$filter = array()){
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// 创建Tree
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$tree = array();
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if(is_array($list)){
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// 创建基于主键的数组引用
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$refer = array();
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foreach($list as $key => $data){
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$refer[$data[$pk]] =& $list[$key];
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}
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foreach($list as $key => $data){
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// 判断是否存在parent
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$parent_id = $data[$pid];
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if($parent_id === null || (int)$root === (int)$parent_id){
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$tree[] =& $list[$key];
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}else{
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if(isset($refer[$parent_id])){
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$parent =& $refer[$parent_id];
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$parent['children'][] =& $list[$key];
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}else{
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if($strict === false){
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$tree[] =& $list[$key];
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}
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}
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}
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}
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//剔除数据
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if(count($filter) > 0){
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foreach($refer as $key => $data){
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foreach ($data as $k => $v) {
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if(in_array($k, $filter)) unset($refer[$key][$k]);
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}
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}
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}
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}
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return $tree;
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}
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/**
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* 将list_to_tree的树还原成列表
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* @param array $tree 原来的树
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* @param string $child 孩子节点的键
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* @param string $order 排序显示的键,一般是主键 升序排列
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* @param array $list 过渡用的中间数组,
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* @return array 返回排过序的列表数组
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*/
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public function tree_to_list($tree, $child = '_child', $order='id', &$list = array()){
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if(is_array($tree)){
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foreach ($tree as $key => $value){
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$reffer = $value;
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if(isset($reffer[$child])){
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unset($reffer[$child]);
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tree_to_list($value[$child], $child, $order, $list);
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}
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$list[] = $reffer;
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}
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$list = $this->list_sort_by($list, $order, $sortby='asc');
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}
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return $list;
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}
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/**
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* 对查询结果集进行排序
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* @access public
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* @param array $list 查询结果
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* @param string $field 排序的字段名
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* @param array $sortby 排序类型 asc正向排序 desc逆向排序 nat自然排序
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* @return array
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*/
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public function list_sort_by($list,$field, $sortby='asc'){
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if(is_array($list)){
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$refer = $resultSet = array();
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foreach($list as $i => $data)
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$refer[$i] = &$data[$field];
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switch($sortby){
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case 'asc': // 正向排序
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asort($refer);
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break;
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case 'desc':// 逆向排序
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arsort($refer);
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break;
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case 'nat': // 自然排序
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natcasesort($refer);
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break;
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}
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foreach ($refer as $key=> $val)
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$resultSet[] = &$list[$key];
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return $resultSet;
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}
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return false;
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}
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/**
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* 在数据列表中搜索
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* @access public
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* @param array $list 数据列表
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* @param mixed $condition 查询条件
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* 支持 array('name'=>$value) 或者 name=$value
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* @return array
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*/
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function list_search($list,$condition){
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if(is_string($condition))
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parse_str($condition, $condition);
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//返回的结果集合
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$resultSet = array();
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foreach ($list as $key => $data){
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$find = false;
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foreach ($condition as $field=>$value){
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if(isset($data[$field])){
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if(0 === strpos($value,'/')){
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$find = preg_match($value,$data[$field]);
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}elseif($data[$field]==$value){
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$find = true;
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}
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}
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}
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if($find){
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$resultSet[] = &$list[$key];
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}
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}
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return $resultSet;
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}
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}
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