82 lines
1.5 KiB
JavaScript
82 lines
1.5 KiB
JavaScript
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class CategoryUtil {
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#tree = []
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constructor (tree) {
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this.#tree = tree
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this.#fillParent(this.#tree)
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}
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/**
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* 获取面包屑
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*
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* @param uid
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* @returns {*[]}
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*/
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getBreadcrumb (uid) {
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let target = this.#getNode(this.#tree, uid)
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if (target == null) {
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return []
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}
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const nodes = []
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while (target != null) {
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nodes.push(target)
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target = target.parent
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}
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return nodes.map(node => {
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return {
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uid: node.uid,
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title: node.title,
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uri: node.uri
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}
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}).reverse()
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}
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/**
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* 获取栏目
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*
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* @param uid
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* @returns {*|null}
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*/
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getCategory (uid) {
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return this.#getNode(this.#tree, uid)
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}
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/**
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* 获取目标节点
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*
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* @param categoryList 栏目列表
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* @param uid 栏目唯一标识
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* @returns {*|null}
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*/
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#getNode (categoryList, uid) {
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for (const node of categoryList) {
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if (node.uid === uid) {
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return node
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}
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if (node.children != null && node.children.length > 0) {
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const result = this.#getNode(node.children, uid)
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if (result != null) {
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return result
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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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/**
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* 填充父节点
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*
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* @param categoryList 栏目列表
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* @param parent 父节点
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*/
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#fillParent (categoryList, parent) {
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for (const node of categoryList) {
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node.parent = parent
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if (node.children != null && node.children.length > 0) {
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this.#fillParent(node.children, node)
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}
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}
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}
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}
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export default CategoryUtil
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