389 lines
15 KiB
TypeScript
389 lines
15 KiB
TypeScript
import { Prisma, PrismaClient } from '@nicestack/common';
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import { BaseService } from "./base.service";
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import { DataArgs, DelegateArgs, DelegateFuncs, DelegateReturnTypes, UpdateOrderArgs } from "./base.type";
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/**
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* BaseTreeService provides a generic CRUD interface for a tree prisma model.
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* It enables common data operations such as find, create, update, and delete.
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*
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* @template D - Type for the model delegate, defining available operations.
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* @template A - Arguments for the model delegate's operations.
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* @template R - Return types for the model delegate's operations.
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*/
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export class BaseTreeService<
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D extends DelegateFuncs,
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A extends DelegateArgs<D> = DelegateArgs<D>,
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R extends DelegateReturnTypes<D> = DelegateReturnTypes<D>,
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> extends BaseService<D, A, R> {
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constructor(
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protected prisma: PrismaClient,
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protected objectType: string,
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protected ancestryType: string = objectType + 'Ancestry',
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protected enableOrder: boolean = false
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) {
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super(prisma, objectType, enableOrder)
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}
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async getNextOrder(
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transaction: any,
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parentId: string | null,
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parentOrder?: number
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): Promise<number> {
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// 查找同层级最后一个节点的 order
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const lastOrder = await transaction[this.objectType].findFirst({
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where: {
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parentId: parentId ?? null
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},
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select: { order: true },
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orderBy: { order: 'desc' },
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} as any);
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// 如果有父节点
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if (parentId) {
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// 获取父节点的 order（如果未提供）
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const parentNodeOrder = parentOrder ?? (
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await transaction[this.objectType].findUnique({
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where: { id: parentId },
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select: { order: true }
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})
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)?.order ?? 0;
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// 如果存在最后一个同层级节点，确保新节点 order 大于最后一个节点
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// 否则，新节点 order 设置为父节点 order + 1
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return lastOrder
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? Math.max(lastOrder.order + this.ORDER_INTERVAL,
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parentNodeOrder + this.ORDER_INTERVAL)
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: parentNodeOrder + this.ORDER_INTERVAL;
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}
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// 对于根节点，直接使用最后一个节点的 order + 1
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return lastOrder?.order ? lastOrder?.order + this.ORDER_INTERVAL : 1;
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}
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async create(args: A['create']) {
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const anyArgs = args as any
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return this.prisma.$transaction(async (transaction) => {
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if (this.enableOrder) {
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// 获取新节点的 order
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anyArgs.data.order = await this.getNextOrder(
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transaction,
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anyArgs?.data.parentId ?? null
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);
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}
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// 创建节点
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const result: any = await super.create(anyArgs, { tx: transaction });
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// 更新父节点的 hasChildren 状态
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if (anyArgs.data.parentId) {
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await transaction[this.objectType].update({
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where: { id: anyArgs.data.parentId },
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data: { hasChildren: true }
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});
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}
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// 创建祖先关系
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const newAncestries = anyArgs.data.parentId
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? [
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...(
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await transaction[this.ancestryType].findMany({
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where: { descendantId: anyArgs.data.parentId },
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select: { ancestorId: true, relDepth: true },
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})
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).map(({ ancestorId, relDepth }) => ({
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ancestorId,
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descendantId: result.id,
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relDepth: relDepth + 1,
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})),
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{
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ancestorId: result.parentId,
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descendantId: result.id,
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relDepth: 1,
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},
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]
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: [{ ancestorId: null, descendantId: result.id, relDepth: 1 }];
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await transaction[this.ancestryType].createMany({ data: newAncestries });
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return result;
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}) as Promise<R['create']>;
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}
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/**
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* 更新现有单位，并在parentId更改时管理DeptAncestry关系。
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* @param data - 用于更新现有单位的数据。
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* @returns 更新后的单位对象。
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*/
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async update(args: A['update']) {
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const anyArgs = args as any
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return this.prisma.$transaction(async (transaction) => {
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const current = await transaction[this.objectType].findUnique({
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where: { id: anyArgs.where.id },
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});
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if (!current) throw new Error('object not found');
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const result: any = await super.update(anyArgs, { tx: transaction });
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if (anyArgs.data.parentId !== current.parentId) {
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await transaction[this.ancestryType].deleteMany({
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where: { descendantId: result.id },
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});
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// 更新原父级的 hasChildren 状态
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if (current.parentId) {
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const childrenCount = await transaction[this.objectType].count({
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where: { parentId: current.parentId, deletedAt: null }
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});
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if (childrenCount === 0) {
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await transaction[this.objectType].update({
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where: { id: current.parentId },
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data: { hasChildren: false }
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});
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}
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}
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if (anyArgs.data.parentId) {
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await transaction[this.objectType].update({
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where: { id: anyArgs.data.parentId },
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data: { hasChildren: true }
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});
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const parentAncestries = await transaction[this.ancestryType].findMany({
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where: { descendantId: anyArgs.data.parentId },
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});
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const newAncestries = parentAncestries.map(
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({ ancestorId, relDepth }) => ({
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ancestorId,
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descendantId: result.id,
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relDepth: relDepth + 1,
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}),
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);
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newAncestries.push({
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ancestorId: anyArgs.data.parentId,
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descendantId: result.id,
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relDepth: 1,
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});
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await transaction[this.ancestryType].createMany({ data: newAncestries });
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} else {
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await transaction[this.ancestryType].create({
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data: { ancestorId: null, descendantId: result.id, relDepth: 0 },
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});
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}
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}
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return result;
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}) as Promise<R['update']>;
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}
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/**
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* Soft deletes records by setting `isDeleted` to true for the given IDs.
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* @param ids - An array of IDs of the records to soft delete.
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* @param data - Additional data to update on soft delete. (Optional)
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* @returns {Promise<R['update'][]>} - A promise resolving to an array of updated records.
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* @example
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* const softDeletedUsers = await service.softDeleteByIds(['user_id1', 'user_id2'], { reason: 'Bulk deletion' });
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*/
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async softDeleteByIds(
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ids: string[],
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data: Partial<DataArgs<A['update']>> = {}, // Default to empty object
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): Promise<R['update'][]> {
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return this.prisma.$transaction(async tx => {
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// 首先找出所有需要软删除的记录的父级ID
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const parentIds = await tx[this.objectType].findMany({
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where: {
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id: { in: ids },
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parentId: { not: null }
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},
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select: { parentId: true }
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});
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const uniqueParentIds = [...new Set(parentIds.map(p => p.parentId))];
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// 执行软删除
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const result = await super.softDeleteByIds(ids, data);
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// 删除相关的祖先关系
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await tx[this.ancestryType].deleteMany({
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where: {
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OR: [
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{ ancestorId: { in: ids } },
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{ descendantId: { in: ids } },
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],
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}
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});
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// 更新父级的 hasChildren 状态
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if (uniqueParentIds.length > 0) {
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for (const parentId of uniqueParentIds) {
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const remainingChildrenCount = await tx[this.objectType].count({
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where: {
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parentId: parentId,
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deletedAt: null
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}
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});
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if (remainingChildrenCount === 0) {
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await tx[this.objectType].update({
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where: { id: parentId },
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data: { hasChildren: false }
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});
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}
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}
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}
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return result;
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}) as Promise<R['update'][]>;
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}
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getAncestors(ids: string[]) {
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if (!ids || ids.length === 0) return [];
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const validIds = ids.filter(id => id != null);
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const hasNull = ids.includes(null)
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return this.prisma[this.ancestryType].findMany({
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where: {
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OR: [
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{ ancestorId: { in: validIds } },
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{ ancestorId: hasNull ? null : undefined },
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]
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},
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});
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}
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getDescendants(ids: string[]) {
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if (!ids || ids.length === 0) return [];
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const validIds = ids.filter(id => id != null);
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const hasNull = ids.includes(null)
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return this.prisma[this.ancestryType].findMany({
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where: {
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OR: [
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{ ancestorId: { in: validIds } },
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{ ancestorId: hasNull ? null : undefined },
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]
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},
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});
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}
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async getDescendantIds(ids: string | string[], includeOriginalIds: boolean = false): Promise<string[]> {
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// 将单个 ID 转换为数组
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const idArray = Array.isArray(ids) ? ids : [ids];
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const res = await this.getDescendants(idArray);
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const descendantSet = new Set(res?.map((item) => item.descendantId) || []);
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if (includeOriginalIds) {
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idArray.forEach(id => descendantSet.add(id));
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}
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return Array.from(descendantSet).filter(Boolean) as string[];
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}
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async getAncestorIds(ids: string | string[], includeOriginalIds: boolean = false): Promise<string[]> {
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// 将单个 ID 转换为数组
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const idArray = Array.isArray(ids) ? ids : [ids];
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const res = await this.getDescendants(idArray);
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const ancestorSet = new Set<string>();
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// 按深度排序并添加祖先ID
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res
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?.sort((a, b) => b.relDepth - a.relDepth)
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?.forEach((item) => ancestorSet.add(item.ancestorId));
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// 根据参数决定是否添加原始ID
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if (includeOriginalIds) {
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idArray.forEach((id) => ancestorSet.add(id));
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}
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return Array.from(ancestorSet).filter(Boolean) as string[];
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}
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async updateOrder(args: UpdateOrderArgs) {
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const { id, overId } = args;
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return this.prisma.$transaction(async (transaction) => {
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// 查找当前节点和目标节点
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const currentObject = await transaction[this.objectType].findUnique({
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where: { id },
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select: { id: true, parentId: true, order: true }
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});
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const targetObject = await transaction[this.objectType].findUnique({
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where: { id: overId },
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select: { id: true, parentId: true, order: true }
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});
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// 验证节点
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if (!currentObject || !targetObject) {
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throw new Error('Invalid object or target object');
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}
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// 查找父节点
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const parentObject = currentObject.parentId
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? await transaction[this.objectType].findUnique({
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where: { id: currentObject.parentId },
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select: { id: true, order: true }
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})
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: null;
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// 确保在同一父节点下移动
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if (currentObject.parentId !== targetObject.parentId) {
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throw new Error('Cannot move between different parent nodes');
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}
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// 查找同层级的所有节点，按 order 排序
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const siblingNodes = await transaction[this.objectType].findMany({
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where: {
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parentId: targetObject.parentId
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},
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select: { id: true, order: true },
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orderBy: { order: 'asc' }
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});
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// 找到目标节点和当前节点在兄弟节点中的索引
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const targetIndex = siblingNodes.findIndex(node => node.id === targetObject.id);
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const currentIndex = siblingNodes.findIndex(node => node.id === currentObject.id);
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// 移除当前节点
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siblingNodes.splice(currentIndex, 1);
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// 在目标位置插入当前节点
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const insertIndex = currentIndex > targetIndex ? targetIndex + 1 : targetIndex;
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siblingNodes.splice(insertIndex, 0, currentObject);
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// 重新分配 order
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const newOrders = this.redistributeOrder(siblingNodes, parentObject?.order || 0);
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// 批量更新节点的 order
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const updatePromises = newOrders.map((nodeOrder, index) =>
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transaction[this.objectType].update({
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where: { id: siblingNodes[index].id },
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data: { order: nodeOrder }
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})
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);
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await Promise.all(updatePromises);
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// 返回更新后的当前节点
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return transaction[this.objectType].findUnique({
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where: { id: currentObject.id }
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});
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});
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}
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// 重新分配 order 的方法
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private redistributeOrder(nodes: Array<{ id: string, order: number }>, parentOrder: number): number[] {
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const MIN_CHILD_ORDER = parentOrder + this.ORDER_INTERVAL; // 子节点 order 必须大于父节点
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const newOrders: number[] = [];
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nodes.forEach((_, index) => {
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// 使用等差数列分配 order，确保大于父节点
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const nodeOrder = MIN_CHILD_ORDER + (index + 1) * this.ORDER_INTERVAL;
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newOrders.push(nodeOrder);
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});
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return newOrders;
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}
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} |