<?php
// +----------------------------------------------------------------------
// | Yzncms [ 御宅男工作室 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2018 http://yzncms.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 御宅男 <530765310@qq.com>
// +----------------------------------------------------------------------
// +----------------------------------------------------------------------
// | 通用的树型类，可以生成任何树型结构
// +----------------------------------------------------------------------
namespace util;
class Tree
{
/**
* 生成树型结构所需要的2维数组
* @var array
*/
public $arr = [];
protected static $instance;
public $options = [];
/**
* 生成树型结构所需修饰符号，可以换成图片
* @var array
*/
public $icon = ['│', '├', '└'];
public $nbsp = " ";
public $id = "id";
public $pidname = 'parentid';
public $child = 'child';
public $ret = '';
/**
* 初始化.
*
* @param array $options 参数
*
* @return Tree
*/
public static function instance($options = [])
{
if (is_null(self::$instance)) {
self::$instance = new static($options);
}
return self::$instance;
}
/**
* 构造函数，初始化类
* @param array $arr 2维数组，例如：
* array(
* 1 => array('id'=>'1','parentid'=>0,'name'=>'一级栏目一'),
* 2 => array('id'=>'2','parentid'=>0,'name'=>'一级栏目二'),
* 3 => array('id'=>'3','parentid'=>1,'name'=>'二级栏目一'),
* 4 => array('id'=>'4','parentid'=>1,'name'=>'二级栏目二'),
* 5 => array('id'=>'5','parentid'=>2,'name'=>'二级栏目三'),
* 6 => array('id'=>'6','parentid'=>3,'name'=>'三级栏目一'),
* 7 => array('id'=>'7','parentid'=>3,'name'=>'三级栏目二')
* )
*/
public function init($arr = [], $pidname = null, $nbsp = null)
{
$this->arr = $arr;
if (!is_null($pidname)) {
$this->pidname = $pidname;
}
if (!is_null($nbsp)) {
$this->nbsp = $nbsp;
}
$this->ret = '';
return $this;
}
/**
* 得到子级数组
* @param int
* @return array
*/
public function getChild($myid)
{
$a = $newarr = [];
if (is_array($this->arr)) {
foreach ($this->arr as $id => $a) {
if ($a[$this->pidname] == $myid) {
$newarr[$id] = $a;
}
}
}
return $newarr;
}
/**
* 读取指定节点的所有孩子节点
* @param int $myid 节点ID
* @param boolean $withself 是否包含自身
* @return array
*/
public function getChildren($myid, $withself = false)
{
$newarr = [];
foreach ($this->arr as $value) {
if (!isset($value['id'])) {
continue;
}
if ($value[$this->pidname] == $myid) {
$newarr[] = $value;
$newarr = array_merge($newarr, $this->getChildren($value['id']));
} elseif ($withself && $value['id'] == $myid) {
$newarr[] = $value;
}
}
return $newarr;
}
/**
* 读取指定节点的所有孩子节点ID
* @param int $myid 节点ID
* @param boolean $withself 是否包含自身
* @return array
*/
public function getChildrenIds($myid, $withself = false)
{
$childrenlist = $this->getChildren($myid, $withself);
$childrenids = [];
foreach ($childrenlist as $k => $v) {
$childrenids[] = $v['id'];
}
return $childrenids;
}
/**
* 得到当前位置父辈数组
* @param int
* @return array
*/
public function getParent($myid)
{
$pid = 0;
$newarr = [];
foreach ($this->arr as $value) {
if (!isset($value['id'])) {
continue;
}
if ($value['id'] == $myid) {
$pid = $value[$this->pidname];
break;
}
}
if ($pid) {
foreach ($this->arr as $value) {
if ($value['id'] == $pid) {
$newarr[] = $value;
break;
}
}
}
return $newarr;
}
/**
* 得到当前位置所有父辈数组
* @param int
* @param bool $withself 是否包含自己
* @return array
*/
public function getParents($myid, $withself = false)
{
$pid = 0;
$newarr = [];
foreach ($this->arr as $value) {
if (!isset($value['id'])) {
continue;
}
if ($value['id'] == $myid) {
if ($withself) {
$newarr[] = $value;
}
$pid = $value[$this->pidname];
break;
}
}
if ($pid) {
$arr = $this->getParents($pid, true);
$newarr = array_merge($arr, $newarr);
}
return $newarr;
}
/**
* 读取指定节点所有父类节点ID
* @param int $myid
* @param boolean $withself
* @return array
*/
public function getParentsIds($myid, $withself = false)
{
$parentlist = $this->getParents($myid, $withself);
$parentsids = [];
foreach ($parentlist as $k => $v) {
$parentsids[] = $v['id'];
}
return $parentsids;
}
/**
* 树型结构Option
* @param int $myid 表示获得这个ID下的所有子级
* @param string $itemtpl 条目模板 如："<option value=@id @selected @disabled>@spacer@name</option>"
* @param mixed $selectedids 被选中的ID，比如在做树型下拉框的时候需要用到
* @param mixed $disabledids 被禁用的ID，比如在做树型下拉框的时候需要用到
* @param string $itemprefix 每一项前缀
* @param string $toptpl 顶级栏目的模板
* @return string
*/
public function getTree($myid, $itemtpl = '', $selectedids = '', $disabledids = '', $itemprefix = '', $toptpl = '')
{
if (!$itemtpl) {
$itemtpl = '<option value=@id @selected @disabled>@spacer @title</option>';
}
$ret = '';
$number = 1;
$childs = $this->getChild($myid);
if ($childs) {
$total = count($childs);
foreach ($childs as $value) {
$id = $value['id'];
$j = $k = '';
if ($number == $total) {
$j .= $this->icon[2];
$k = $itemprefix ? $this->nbsp : '';
} else {
$j .= $this->icon[1];
$k = $itemprefix ? $this->icon[0] : '';
}
$spacer = $itemprefix ? $itemprefix . $j : '';
if ('' !== $selectedids) {
$selected = $selectedids && in_array($id, (is_array($selectedids) ? $selectedids : explode(',', $selectedids))) ? 'selected' : '';
$value = array_merge($value, ['selected' => $selected]);
}
if ('' !== $disabledids) {
$disabled = $disabledids && in_array($id, (is_array($disabledids) ? $disabledids : explode(',', $disabledids))) ? 'disabled' : '';
$value = array_merge($value, ['disabled' => $disabled]);
}
$value = array_merge($value, ['spacer' => $spacer]);
$value = array_combine(array_map(function ($k) {
return '@' . $k;
}, array_keys($value)), $value);
$nstr = strtr((($value["@{$this->pidname}"] == 0 || $this->getChild($id)) && $toptpl ? $toptpl : $itemtpl), $value);
$ret .= $nstr;
$ret .= $this->getTree($id, $itemtpl, $selectedids, $disabledids, $itemprefix . $k . $this->nbsp, $toptpl);
$number++;
}
}
return $ret;
}
/**
* 树型结构UL
* @param int $myid 表示获得这个ID下的所有子级
* @param string $itemtpl 条目模板 如："<li value=@id @selected @disabled>@name @childlist</li>"
* @param string $selectedids 选中的ID
* @param string $disabledids 禁用的ID
* @param string $wraptag 子列表包裹标签
* @param string $wrapattr 子列表包裹属性
* @return string
*/
public function getTreeUl($myid, $itemtpl, $selectedids = '', $disabledids = '', $wraptag = 'ul', $wrapattr = '')
{
$str = '';
$childs = $this->getChild($myid);
if ($childs) {
foreach ($childs as $value) {
$id = $value['id'];
unset($value['child']);
$selected = $selectedids && in_array($id, (is_array($selectedids) ? $selectedids : explode(',', $selectedids))) ? 'selected' : '';
$disabled = $disabledids && in_array($id, (is_array($disabledids) ? $disabledids : explode(',', $disabledids))) ? 'disabled' : '';
$value = array_merge($value, ['selected' => $selected, 'disabled' => $disabled]);
$value = array_combine(array_map(function ($k) {
return '@' . $k;
}, array_keys($value)), $value);
$nstr = strtr($itemtpl, $value);
$childdata = $this->getTreeUl($id, $itemtpl, $selectedids, $disabledids, $wraptag, $wrapattr);
$childlist = $childdata ? "<{$wraptag} {$wrapattr}>" . $childdata . "</{$wraptag}>" : "";
$str .= strtr($nstr, ['@childlist' => $childlist]);
}
}
return $str;
}
/**
* 将数据集格式化成层次结构
* @param int $pid 父级id
* @param int $max_level 最多返回多少层，0为不限制
* @param int $curr_level 当前层数
* @author 蔡伟明 <314013107@qq.com>
* @return array
*/
public function toLayer($pid = 0, $max_level = 0, $curr_level = 0)
{
$trees = [];
$lists = $this->getChild($pid);
foreach ($lists as $key => $value) {
if ($value[$this->pidname] == $pid) {
if ($max_level > 0 && $curr_level == $max_level) {
return $trees;
}
unset($lists[$key]);
$child = $this->toLayer($value[$this->id], $max_level, $curr_level + 1);
if (!empty($child)) {
$value[$this->child] = $child;
}
$trees[$key] = $value;
}
}
return $trees;
}
/**
*
* 获取树状数组
*
* @param string $myid 要查询的ID
* @param string $itemprefix 前缀
*
* @return string
*/
public function getTreeArray($myid, $itemprefix = '')
{
$child = $this->getChild($myid);
$n = 0;
$data = [];
$number = 1;
if (is_array($child)) {
$total = count($child);
foreach ($child as $id => $value) {
$j = $k = '';
if ($number == $total) {
$j .= $this->icon[2];
$k = $itemprefix ? $this->nbsp : '';
} else {
$j .= $this->icon[1];
$k = $itemprefix ? $this->icon[0] : '';
}
$spacer = $itemprefix ? $itemprefix . $j : '';
$value['spacer'] = $spacer;
$data[$n] = $value;
$data[$n]['childlist'] = $this->getTreeArray($value[$this->id], $itemprefix . $k . $this->nbsp);
$n++;
$number++;
}
}
return $data;
}
/**
* 将getTreeArray的结果返回为二维数组
* @param array $data
* @return array
*/
public function getTreeList($data = [], $field = 'name')
{
$arr = [];
foreach ($data as $k => $v) {
$childlist = $v['childlist'] ?? [];
unset($v['childlist']);
$v[$field] = $v['spacer'] . ' ' . $v[$field];
$v['haschild'] = $childlist ? 1 : 0;
if ($v[$this->id]) {
$arr[] = $v;
}
if ($childlist) {
$arr = array_merge($arr, $this->getTreeList($childlist, $field));
}
}
return $arr;
}
}