401 lines
9.8 KiB
TypeScript
401 lines
9.8 KiB
TypeScript
interface TreeHelperConfig {
|
||
id: string
|
||
children: string
|
||
pid: string
|
||
}
|
||
|
||
const DEFAULT_CONFIG: TreeHelperConfig = {
|
||
id: 'id',
|
||
children: 'children',
|
||
pid: 'pid'
|
||
}
|
||
export const defaultProps = {
|
||
children: 'children',
|
||
label: 'name',
|
||
value: 'id',
|
||
isLeaf: 'leaf',
|
||
emitPath: false // 用于 cascader 组件：在选中节点改变时，是否返回由该节点所在的各级菜单的值所组成的数组，若设置 false，则只返回该节点的值
|
||
}
|
||
|
||
const getConfig = (config: Partial<TreeHelperConfig>) => Object.assign({}, DEFAULT_CONFIG, config)
|
||
|
||
// tree from list
|
||
export const listToTree = <T = any>(list: any[], config: Partial<TreeHelperConfig> = {}): T[] => {
|
||
const conf = getConfig(config) as TreeHelperConfig
|
||
const nodeMap = new Map()
|
||
const result: T[] = []
|
||
const { id, children, pid } = conf
|
||
|
||
for (const node of list) {
|
||
node[children] = node[children] || []
|
||
nodeMap.set(node[id], node)
|
||
}
|
||
for (const node of list) {
|
||
const parent = nodeMap.get(node[pid])
|
||
;(parent ? parent.children : result).push(node)
|
||
}
|
||
return result
|
||
}
|
||
|
||
export const treeToList = <T = any>(tree: any, config: Partial<TreeHelperConfig> = {}): T => {
|
||
config = getConfig(config)
|
||
const { children } = config
|
||
const result: any = [...tree]
|
||
for (let i = 0; i < result.length; i++) {
|
||
if (!result[i][children!]) continue
|
||
result.splice(i + 1, 0, ...result[i][children!])
|
||
}
|
||
return result
|
||
}
|
||
|
||
export const findNode = <T = any>(
|
||
tree: any,
|
||
func: Fn,
|
||
config: Partial<TreeHelperConfig> = {}
|
||
): T | null => {
|
||
config = getConfig(config)
|
||
const { children } = config
|
||
const list = [...tree]
|
||
for (const node of list) {
|
||
if (func(node)) return node
|
||
node[children!] && list.push(...node[children!])
|
||
}
|
||
return null
|
||
}
|
||
|
||
export const findNodeAll = <T = any>(
|
||
tree: any,
|
||
func: Fn,
|
||
config: Partial<TreeHelperConfig> = {}
|
||
): T[] => {
|
||
config = getConfig(config)
|
||
const { children } = config
|
||
const list = [...tree]
|
||
const result: T[] = []
|
||
for (const node of list) {
|
||
func(node) && result.push(node)
|
||
node[children!] && list.push(...node[children!])
|
||
}
|
||
return result
|
||
}
|
||
|
||
export const findPath = <T = any>(
|
||
tree: any,
|
||
func: Fn,
|
||
config: Partial<TreeHelperConfig> = {}
|
||
): T | T[] | null => {
|
||
config = getConfig(config)
|
||
const path: T[] = []
|
||
const list = [...tree]
|
||
const visitedSet = new Set()
|
||
const { children } = config
|
||
while (list.length) {
|
||
const node = list[0]
|
||
if (visitedSet.has(node)) {
|
||
path.pop()
|
||
list.shift()
|
||
} else {
|
||
visitedSet.add(node)
|
||
node[children!] && list.unshift(...node[children!])
|
||
path.push(node)
|
||
if (func(node)) {
|
||
return path
|
||
}
|
||
}
|
||
}
|
||
return null
|
||
}
|
||
|
||
export const findPathAll = (tree: any, func: Fn, config: Partial<TreeHelperConfig> = {}) => {
|
||
config = getConfig(config)
|
||
const path: any[] = []
|
||
const list = [...tree]
|
||
const result: any[] = []
|
||
const visitedSet = new Set(),
|
||
{ children } = config
|
||
while (list.length) {
|
||
const node = list[0]
|
||
if (visitedSet.has(node)) {
|
||
path.pop()
|
||
list.shift()
|
||
} else {
|
||
visitedSet.add(node)
|
||
node[children!] && list.unshift(...node[children!])
|
||
path.push(node)
|
||
func(node) && result.push([...path])
|
||
}
|
||
}
|
||
return result
|
||
}
|
||
|
||
export const filter = <T = any>(
|
||
tree: T[],
|
||
func: (n: T) => boolean,
|
||
config: Partial<TreeHelperConfig> = {}
|
||
): T[] => {
|
||
config = getConfig(config)
|
||
const children = config.children as string
|
||
|
||
function listFilter(list: T[]) {
|
||
return list
|
||
.map((node: any) => ({ ...node }))
|
||
.filter((node) => {
|
||
node[children] = node[children] && listFilter(node[children])
|
||
return func(node) || (node[children] && node[children].length)
|
||
})
|
||
}
|
||
|
||
return listFilter(tree)
|
||
}
|
||
|
||
export const forEach = <T = any>(
|
||
tree: T[],
|
||
func: (n: T) => any,
|
||
config: Partial<TreeHelperConfig> = {}
|
||
): void => {
|
||
config = getConfig(config)
|
||
const list: any[] = [...tree]
|
||
const { children } = config
|
||
for (let i = 0; i < list.length; i++) {
|
||
// func 返回true就终止遍历，避免大量节点场景下无意义循环，引起浏览器卡顿
|
||
if (func(list[i])) {
|
||
return
|
||
}
|
||
children && list[i][children] && list.splice(i + 1, 0, ...list[i][children])
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @description: Extract tree specified structure
|
||
*/
|
||
export const treeMap = <T = any>(
|
||
treeData: T[],
|
||
opt: { children?: string; conversion: Fn }
|
||
): T[] => {
|
||
return treeData.map((item) => treeMapEach(item, opt))
|
||
}
|
||
|
||
/**
|
||
* @description: Extract tree specified structure
|
||
*/
|
||
export const treeMapEach = (
|
||
data: any,
|
||
{ children = 'children', conversion }: { children?: string; conversion: Fn }
|
||
) => {
|
||
const haveChildren = Array.isArray(data[children]) && data[children].length > 0
|
||
const conversionData = conversion(data) || {}
|
||
if (haveChildren) {
|
||
return {
|
||
...conversionData,
|
||
[children]: data[children].map((i: number) =>
|
||
treeMapEach(i, {
|
||
children,
|
||
conversion
|
||
})
|
||
)
|
||
}
|
||
} else {
|
||
return {
|
||
...conversionData
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 递归遍历树结构
|
||
* @param treeDatas 树
|
||
* @param callBack 回调
|
||
* @param parentNode 父节点
|
||
*/
|
||
export const eachTree = (treeDatas: any[], callBack: Fn, parentNode = {}) => {
|
||
treeDatas.forEach((element) => {
|
||
const newNode = callBack(element, parentNode) || element
|
||
if (element.children) {
|
||
eachTree(element.children, callBack, newNode)
|
||
}
|
||
})
|
||
}
|
||
|
||
/**
|
||
* 构造树型结构数据
|
||
* @param {*} data 数据源
|
||
* @param {*} id id字段 默认 'id'
|
||
* @param {*} parentId 父节点字段 默认 'parentId'
|
||
* @param {*} children 孩子节点字段 默认 'children'
|
||
*/
|
||
export const handleTree = (data: any[], id?: string, parentId?: string, children?: string) => {
|
||
if (!Array.isArray(data)) {
|
||
console.warn('data must be an array')
|
||
return []
|
||
}
|
||
const config = {
|
||
id: id || 'id',
|
||
parentId: parentId || 'parentId',
|
||
childrenList: children || 'children'
|
||
}
|
||
|
||
const childrenListMap = {}
|
||
const nodeIds = {}
|
||
const tree: any[] = []
|
||
|
||
for (const d of data) {
|
||
const parentId = d[config.parentId]
|
||
if (childrenListMap[parentId] == null) {
|
||
childrenListMap[parentId] = []
|
||
}
|
||
nodeIds[d[config.id]] = d
|
||
childrenListMap[parentId].push(d)
|
||
}
|
||
|
||
for (const d of data) {
|
||
const parentId = d[config.parentId]
|
||
if (nodeIds[parentId] == null) {
|
||
tree.push(d)
|
||
}
|
||
}
|
||
|
||
for (const t of tree) {
|
||
adaptToChildrenList(t)
|
||
}
|
||
|
||
function adaptToChildrenList(o) {
|
||
if (childrenListMap[o[config.id]] !== null) {
|
||
o[config.childrenList] = childrenListMap[o[config.id]]
|
||
}
|
||
if (o[config.childrenList]) {
|
||
for (const c of o[config.childrenList]) {
|
||
adaptToChildrenList(c)
|
||
}
|
||
}
|
||
}
|
||
|
||
return tree
|
||
}
|
||
|
||
/**
|
||
* 构造树型结构数据
|
||
* @param {*} data 数据源
|
||
* @param {*} id id字段 默认 'id'
|
||
* @param {*} parentId 父节点字段 默认 'parentId'
|
||
* @param {*} children 孩子节点字段 默认 'children'
|
||
* @param {*} rootId 根Id 默认 0
|
||
*/
|
||
// @ts-ignore
|
||
export const handleTree2 = (data, id, parentId, children, rootId) => {
|
||
id = id || 'id'
|
||
parentId = parentId || 'parentId'
|
||
// children = children || 'children'
|
||
rootId =
|
||
rootId ||
|
||
Math.min(
|
||
...data.map((item) => {
|
||
return item[parentId]
|
||
})
|
||
) ||
|
||
0
|
||
// 对源数据深度克隆
|
||
const cloneData = JSON.parse(JSON.stringify(data))
|
||
// 循环所有项
|
||
const treeData = cloneData.filter((father) => {
|
||
const branchArr = cloneData.filter((child) => {
|
||
// 返回每一项的子级数组
|
||
return father[id] === child[parentId]
|
||
})
|
||
branchArr.length > 0 ? (father.children = branchArr) : ''
|
||
// 返回第一层
|
||
return father[parentId] === rootId
|
||
})
|
||
return treeData !== '' ? treeData : data
|
||
}
|
||
|
||
/**
|
||
* 校验选中的节点，是否为指定 level
|
||
*
|
||
* @param tree 要操作的树结构数据
|
||
* @param nodeId 需要判断在什么层级的数据
|
||
* @param level 检查的级别, 默认检查到二级
|
||
* @return true 是；false 否
|
||
*/
|
||
export const checkSelectedNode = (tree: any[], nodeId: any, level = 2): boolean => {
|
||
if (typeof tree === 'undefined' || !Array.isArray(tree) || tree.length === 0) {
|
||
console.warn('tree must be an array')
|
||
return false
|
||
}
|
||
|
||
// 校验是否是一级节点
|
||
if (tree.some((item) => item.id === nodeId)) {
|
||
return false
|
||
}
|
||
|
||
// 递归计数
|
||
let count = 1
|
||
|
||
// 深层次校验
|
||
function performAThoroughValidation(arr: any[]): boolean {
|
||
count += 1
|
||
for (const item of arr) {
|
||
if (item.id === nodeId) {
|
||
return true
|
||
} else if (typeof item.children !== 'undefined' && item.children.length !== 0) {
|
||
if (performAThoroughValidation(item.children)) {
|
||
return true
|
||
}
|
||
}
|
||
}
|
||
return false
|
||
}
|
||
|
||
for (const item of tree) {
|
||
count = 1
|
||
if (performAThoroughValidation(item.children)) {
|
||
// 找到后对比是否是期望的层级
|
||
if (count >= level) {
|
||
return true
|
||
}
|
||
}
|
||
}
|
||
|
||
return false
|
||
}
|
||
|
||
/**
|
||
* 获取节点的完整结构
|
||
* @param tree 树数据
|
||
* @param nodeId 节点 id
|
||
*/
|
||
export const treeToString = (tree: any[], nodeId) => {
|
||
if (typeof tree === 'undefined' || !Array.isArray(tree) || tree.length === 0) {
|
||
console.warn('tree must be an array')
|
||
return ''
|
||
}
|
||
// 校验是否是一级节点
|
||
const node = tree.find((item) => item.id === nodeId)
|
||
if (typeof node !== 'undefined') {
|
||
return node.name
|
||
}
|
||
let str = ''
|
||
|
||
function performAThoroughValidation(arr) {
|
||
for (const item of arr) {
|
||
if (item.id === nodeId) {
|
||
str += ` / ${item.name}`
|
||
return true
|
||
} else if (typeof item.children !== 'undefined' && item.children.length !== 0) {
|
||
str += ` / ${item.name}`
|
||
if (performAThoroughValidation(item.children)) {
|
||
return true
|
||
}
|
||
}
|
||
}
|
||
return false
|
||
}
|
||
|
||
for (const item of tree) {
|
||
str = `${item.name}`
|
||
if (performAThoroughValidation(item.children)) {
|
||
break
|
||
}
|
||
}
|
||
return str
|
||
}
|