feat: implement demo candidate 1.0.0-rc.1

2026-09-03 21:48:12 +08:00
commit 043f8a823c
25 changed files with 9883 additions and 0 deletions
--- a/src/service/goods.ts
+++ b/src/service/goods.ts
@@ -0,0 +1,118 @@
+import { Inject, Provide } from '@midwayjs/core';
+import {
+  InjectSaasCrud,
+  SaasAction,
+  SaasActionContext,
+  SaasBusinessReject,
+  SaasCrudCaller,
+  SaasCrudService,
+  SaasCrudServiceBase,
+} from '@cool-midway/module-runtime';
+import {
+  Actions,
+  Crud,
+  Events,
+  type GoodsBatchInfoInput,
+  type GoodsBatchInfoOutput,
+  type GoodsInfoOutput,
+  type GoodsReleaseStockInput,
+  type GoodsReleaseStockOutput,
+  type GoodsReserveStockInput,
+  type GoodsReserveStockOutput,
+} from '../saas/generated';
+
+@Provide()
+@SaasCrudService(Crud.Goods)
+export class GoodsService extends SaasCrudServiceBase<typeof Crud.Goods> {
+  @InjectSaasCrud(Crud.Goods)
+  private readonly goods!: SaasCrudCaller<typeof Crud.Goods>;
+
+  @Inject()
+  private readonly saasActionContext!: SaasActionContext;
+
+  @SaasAction(Actions.GoodsBatchInfo)
+  async batchInfo(
+    input: GoodsBatchInfoInput
+  ): Promise<GoodsBatchInfoOutput> {
+    const list: GoodsInfoOutput[] = [];
+    for (const id of input.ids) {
+      const goods = await this.findGoods(id);
+      if (goods) list.push(goods);
+    }
+    return { list };
+  }
+
+  @SaasAction(Actions.GoodsReserveStock)
+  async reserveStock(
+    input: GoodsReserveStockInput
+  ): Promise<GoodsReserveStockOutput> {
+    const goods = await this.requireGoods(input.goodsId);
+    if (goods.status !== 1) {
+      throw new SaasBusinessReject(
+        'GOODS_UNAVAILABLE',
+        `商品 ${input.goodsId} 当前不可售`
+      );
+    }
+    if (goods.stock < input.quantity) {
+      throw new SaasBusinessReject(
+        'INSUFFICIENT_STOCK',
+        `商品 ${input.goodsId} 库存不足`,
+        { available: goods.stock, requested: input.quantity }
+      );
+    }
+
+    const remainingStock = goods.stock - input.quantity;
+    this.saasActionContext.raise(Events.DemoGoodsStockReserved, {
+      goodsId: input.goodsId,
+      quantity: input.quantity,
+      remainingStock,
+    });
+    await this.updateStock(input.goodsId, remainingStock);
+    return { goodsId: input.goodsId, remainingStock };
+  }
+
+  @SaasAction(Actions.GoodsReleaseStock)
+  async releaseStock(
+    input: GoodsReleaseStockInput
+  ): Promise<GoodsReleaseStockOutput> {
+    const goods = await this.requireGoods(input.goodsId);
+    const currentStock = goods.stock + input.quantity;
+
+    this.saasActionContext.raise(Events.DemoGoodsStockReserved, {
+      goodsId: input.goodsId,
+      quantity: input.quantity,
+      remainingStock: currentStock,
+    });
+    await this.updateStock(input.goodsId, currentStock);
+    return { goodsId: input.goodsId, currentStock };
+  }
+
+  private async findGoods(goodsId: number): Promise<GoodsInfoOutput | null> {
+    const rows = await this.goods.list({
+      where: { id: String(goodsId) },
+      take: 1,
+    });
+    return rows[0] || null;
+  }
+
+  private async requireGoods(goodsId: number): Promise<GoodsInfoOutput> {
+    const goods = await this.findGoods(goodsId);
+    if (!goods) {
+      throw new SaasBusinessReject(
+        'GOODS_NOT_FOUND',
+        `商品 ${goodsId} 不存在`
+      );
+    }
+    return goods;
+  }
+
+  private async updateStock(goodsId: number, stock: number): Promise<void> {
+    const result = await this.goods.update({ id: String(goodsId), stock });
+    if (result.affected !== 1) {
+      throw new SaasBusinessReject(
+        'GOODS_STOCK_UPDATE_FAILED',
+        `商品 ${goodsId} 库存更新失败`
+      );
+    }
+  }
+}