feat: enrich products with creator info

packages/api-gateway/src/index.ts

@@ -5,6 +5,7 @@ app.use(express.json());
 
 const USER_SERVICE = "http://user-service:3001";
 const PRODUCT_SERVICE = "http://product-service:3002";
+const ORDER_SERVICE = "http://order-service:3005";
 
 app.get("/users", async (_req, res) => {
   const response = await fetch(`${USER_SERVICE}/users`);
@@ -44,6 +45,25 @@ app.post("/products", async (req, res) => {
   res.status(response.status).json(await response.json());
 });
 
+app.get("/orders", async (_req, res) => {
+  const response = await fetch(`${ORDER_SERVICE}/orders`);
+  res.json(await response.json());
+});
+
+app.get("/orders/:id", async (req, res) => {
+  const response = await fetch(`${ORDER_SERVICE}/orders/${req.params.id}`);
+  res.status(response.status).json(await response.json());
+});
+
+app.post("/orders", async (req, res) => {
+  const response = await fetch(`${ORDER_SERVICE}/orders`, {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify(req.body),
+  });
+  res.status(response.status).json(await response.json());
+});
+
 app.listen(3000, () => {
   console.log("api-gateway listening on :3000");
 });

packages/order-service/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "@playground/order-service",
+  "version": "1.0.0",
+  "private": true,
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "build": "tsc --build",
+    "start": "node dist/index.js"
+  },
+  "dependencies": {
+    "@playground/database": "*",
+    "express": "^4.21.0"
+  },
+  "devDependencies": {
+    "@types/express": "^5.0.0"
+  }
+}

packages/order-service/src/index.ts

@@ -0,0 +1,42 @@
+import express from "express";
+import { insert, findById, findAll } from "@playground/database";
+
+const app = express();
+app.use(express.json());
+
+const PRODUCT_SERVICE = "http://product-service:3002";
+
+app.get("/orders", (_req, res) => {
+  res.json(findAll("orders"));
+});
+
+app.get("/orders/:id", (req, res) => {
+  const order = findById("orders", req.params.id);
+  if (!order) {
+    res.status(404).json({ error: "Order not found" });
+    return;
+  }
+  res.json(order);
+});
+
+app.post("/orders", async (req, res) => {
+  const { productId, userId } = req.body;
+
+  const productResponse = await fetch(`${PRODUCT_SERVICE}/products/${productId}`);
+  if (!productResponse.ok) {
+    res.status(400).json({ error: "Invalid product" });
+    return;
+  }
+
+  const order = insert("orders", {
+    id: crypto.randomUUID(),
+    productId,
+    userId,
+    status: "created",
+  });
+  res.status(201).json(order);
+});
+
+app.listen(3005, () => {
+  console.log("order-service listening on :3005");
+});

packages/order-service/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "dist"
+  },
+  "include": ["src"],
+  "references": [
+    { "path": "../database" }
+  ]
+}

packages/product-service/src/index.ts

@@ -4,6 +4,8 @@ import { insert, findById, findAll } from "@playground/database";
 const app = express();
 app.use(express.json());
 
+const USER_SERVICE = "http://user-service:3001";
+
 app.get("/products", (_req, res) => {
   res.json(findAll("products"));
 });
@@ -22,6 +24,17 @@ app.post("/products", (req, res) => {
   res.status(201).json(product);
 });
 
+app.get("/products/:id/creator", async (req, res) => {
+  const product = findById("products", req.params.id);
+  if (!product) {
+    res.status(404).json({ error: "Product not found" });
+    return;
+  }
+  const response = await fetch(`${USER_SERVICE}/users/${product.createdBy}`);
+  const creator = await response.json();
+  res.json({ product, creator });
+});
+
 app.listen(3002, () => {
   console.log("product-service listening on :3002");
 });

tsconfig.json

@@ -5,6 +5,7 @@
     { "path": "packages/user-service" },
     { "path": "packages/product-service" },
     { "path": "packages/api-gateway" },
-    { "path": "packages/frontend" }
+    { "path": "packages/frontend" },
+    { "path": "packages/order-service" }
   ]
 }