119 lines
3.3 KiB
TypeScript
119 lines
3.3 KiB
TypeScript
import { Inject, Provide } from '@midwayjs/core';
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import {
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InjectSaasCrud,
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SaasAction,
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SaasActionContext,
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SaasBusinessReject,
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SaasCrudCaller,
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SaasCrudService,
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SaasCrudServiceBase,
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} from '@cool-midway/module-runtime';
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import {
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Actions,
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Crud,
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Events,
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type GoodsBatchInfoInput,
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type GoodsBatchInfoOutput,
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type GoodsInfoOutput,
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type GoodsReleaseStockInput,
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type GoodsReleaseStockOutput,
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type GoodsReserveStockInput,
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type GoodsReserveStockOutput,
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} from '../saas/generated';
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@Provide()
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@SaasCrudService(Crud.Goods)
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export class GoodsService extends SaasCrudServiceBase<typeof Crud.Goods> {
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@InjectSaasCrud(Crud.Goods)
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private readonly goods!: SaasCrudCaller<typeof Crud.Goods>;
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@Inject()
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private readonly saasActionContext!: SaasActionContext;
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@SaasAction(Actions.GoodsBatchInfo)
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async batchInfo(
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input: GoodsBatchInfoInput
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): Promise<GoodsBatchInfoOutput> {
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const list: GoodsInfoOutput[] = [];
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for (const id of input.ids) {
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const goods = await this.findGoods(id);
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if (goods) list.push(goods);
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}
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return { list };
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}
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@SaasAction(Actions.GoodsReserveStock)
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async reserveStock(
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input: GoodsReserveStockInput
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): Promise<GoodsReserveStockOutput> {
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const goods = await this.requireGoods(input.goodsId);
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if (goods.status !== 1) {
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throw new SaasBusinessReject(
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'GOODS_UNAVAILABLE',
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`商品 ${input.goodsId} 当前不可售`
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);
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}
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if (goods.stock < input.quantity) {
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throw new SaasBusinessReject(
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'INSUFFICIENT_STOCK',
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`商品 ${input.goodsId} 库存不足`,
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{ available: goods.stock, requested: input.quantity }
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);
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}
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const remainingStock = goods.stock - input.quantity;
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this.saasActionContext.raise(Events.DemoGoodsStockReserved, {
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goodsId: input.goodsId,
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quantity: input.quantity,
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remainingStock,
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});
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await this.updateStock(input.goodsId, remainingStock);
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return { goodsId: input.goodsId, remainingStock };
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}
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@SaasAction(Actions.GoodsReleaseStock)
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async releaseStock(
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input: GoodsReleaseStockInput
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): Promise<GoodsReleaseStockOutput> {
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const goods = await this.requireGoods(input.goodsId);
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const currentStock = goods.stock + input.quantity;
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this.saasActionContext.raise(Events.DemoGoodsStockReserved, {
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goodsId: input.goodsId,
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quantity: input.quantity,
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remainingStock: currentStock,
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});
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await this.updateStock(input.goodsId, currentStock);
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return { goodsId: input.goodsId, currentStock };
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}
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private async findGoods(goodsId: number): Promise<GoodsInfoOutput | null> {
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const rows = await this.goods.list({
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where: { id: String(goodsId) },
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take: 1,
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});
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return rows[0] || null;
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}
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private async requireGoods(goodsId: number): Promise<GoodsInfoOutput> {
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const goods = await this.findGoods(goodsId);
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if (!goods) {
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throw new SaasBusinessReject(
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'GOODS_NOT_FOUND',
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`商品 ${goodsId} 不存在`
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);
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}
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return goods;
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}
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private async updateStock(goodsId: number, stock: number): Promise<void> {
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const result = await this.goods.update({ id: String(goodsId), stock });
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if (result.affected !== 1) {
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throw new SaasBusinessReject(
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'GOODS_STOCK_UPDATE_FAILED',
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`商品 ${goodsId} 库存更新失败`
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);
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}
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}
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}
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