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