useTree.ts
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import type { InsertNodeParams, ReplaceFields, TreeItem } from './types';
import type { Ref, ComputedRef } from 'vue';
import { cloneDeep } from 'lodash-es';
import { unref } from 'vue';
import { forEach } from '/@/utils/helper/treeHelper';
export function useTree(
treeDataRef: Ref<TreeItem[]>,
getReplaceFields: ComputedRef<ReplaceFields>
) {
// 更新节点
function updateNodeByKey(key: string, node: TreeItem, list?: TreeItem[]) {
if (!key) return;
const treeData = list || unref(treeDataRef);
const { key: keyField, children: childrenField } = unref(getReplaceFields);
if (!childrenField || !keyField) return;
for (let index = 0; index < treeData.length; index++) {
const element: any = treeData[index];
const children = element[childrenField];
if (element[keyField] === key) {
treeData[index] = { ...treeData[index], ...node };
break;
} else if (children && children.length) {
updateNodeByKey(key, node, element[childrenField]);
}
}
}
// 展开指定级别
function filterByLevel(level = 1, list?: TreeItem[], currentLevel = 1) {
if (!level) {
return [];
}
const res: (string | number)[] = [];
const data = list || unref(treeDataRef) || [];
for (let index = 0; index < data.length; index++) {
const item = data[index] as any;
const { key: keyField, children: childrenField } = unref(getReplaceFields);
const key = keyField ? item[keyField] : '';
const children = childrenField ? item[childrenField] : [];
res.push(key);
if (children && children.length && currentLevel < level) {
currentLevel += 1;
res.push(...filterByLevel(level, children, currentLevel));
}
}
return res as string[] | number[];
}
/**
* 添加节点
*/
function insertNodeByKey({ parentKey = null, node, push = 'push' }: InsertNodeParams) {
const treeData: any = cloneDeep(unref(treeDataRef));
if (!parentKey) {
treeData[push](node);
treeDataRef.value = treeData;
return;
}
const { key: keyField, children: childrenField } = unref(getReplaceFields);
if (!childrenField || !keyField) return;
forEach(treeData, (treeItem) => {
if (treeItem[keyField] === parentKey) {
treeItem[childrenField] = treeItem[childrenField] || [];
treeItem[childrenField][push](node);
}
});
treeDataRef.value = treeData;
}
// 删除节点
function deleteNodeByKey(key: string, list?: TreeItem[]) {
if (!key) return;
const treeData = list || unref(treeDataRef);
const { key: keyField, children: childrenField } = unref(getReplaceFields);
if (!childrenField || !keyField) return;
for (let index = 0; index < treeData.length; index++) {
const element: any = treeData[index];
const children = element[childrenField];
if (element[keyField] === key) {
treeData.splice(index, 1);
break;
} else if (children && children.length) {
deleteNodeByKey(key, element[childrenField]);
}
}
}
return { deleteNodeByKey, insertNodeByKey, filterByLevel, updateNodeByKey };
}