electricmonk · electricmonk · Sep 29, 2023 · Sep 29, 2023
diff --git a/packages/server/package.json b/packages/server/package.json
@@ -23,6 +23,7 @@
   "dependencies": {
     "@fastify/cors": "^8.4.0",
     "fastify": "^4.23.2",
+    "fastify-type-provider-zod": "^1.1.9",
     "mongodb": "^4.17.1",
     "nanoid": "^4.0.2",
     "ts-byob": "^1.0.3",

diff --git a/packages/server/src/routes.ts b/packages/server/src/routes.ts
@@ -1,6 +1,7 @@
 import {LineItem, Order, Product, ProductTemplate} from "./types";
-import {FastifyInstance, FastifyRequest} from "fastify";
-
+import {FastifyInstance} from "fastify";
+import {serializerCompiler, validatorCompiler, ZodTypeProvider} from "fastify-type-provider-zod";
+import {z} from "zod";
 
 type Cart = {
     id: string;
@@ -9,76 +10,132 @@ type Cart = {
 
 export interface ProductRepository {
     findById(productId: Product["id"]): Promise<Product | undefined>;
+
     create(template: Omit<Product, "id">): Promise<Product>;
+
     findAll(): Promise<Product[]>;
 }
 
 export interface OrderRepository {
     create(order: Omit<Order, "id">): Promise<Order>;
+
     findById(orderId: string): Promise<Order | null>;
 
 }
 
-type CartId = {Params: {cartId: string}};
-type OrderId = {Params: {orderId: string}};
+const CartIdSchema = z.object({
+    cartId: z.string()
+});
 
 export const createRoutes = (productRepo: ProductRepository, orderRepo: OrderRepository) => (fastify: FastifyInstance, opts: any, done: () => void) => {
+    fastify.setValidatorCompiler(validatorCompiler);
+    fastify.setSerializerCompiler(serializerCompiler);
+
+    const f = fastify.withTypeProvider<ZodTypeProvider>();
+
     const sessions: Record<string, Cart> = {};
 
-    fastify.get("/cart/:cartId", (req: FastifyRequest<CartId>, res) => {
-        const {cartId} = req.params;
-        res.send(sessions[cartId]);
+    f.route({
+        url: "/cart/:cartId",
+        method: "GET",
+        schema: {
+            params: CartIdSchema,
+        },
+        handler: (req, res) => {
+            const {cartId} = req.params;
+            res.send(sessions[cartId]);
+        }
     });
 
-    fastify.get("/cart/:cartId/count", (req: FastifyRequest<CartId>, res) => {
-        const {cartId} = req.params;
-        res.send(sessions[cartId]?.items.length || 0);
+    f.route({
+        method: "GET",
+        url: "/cart/:cartId/count",
+        schema: {
+            params: CartIdSchema,
+        },
+        handler: (req, res) => {
+            const {cartId} = req.params;
+            res.send(sessions[cartId]?.items.length || 0);
+        }
     });
 
-    fastify.post("/cart/:cartId", async (req: FastifyRequest<CartId & {Body: {productId: string}}> , res) => {
-        const {cartId} = req.params;
-        const {productId} = req.body;
-        sessions[cartId] = sessions[cartId] || {id: cartId, items: []};
-        const product = await productRepo.findById(productId);
-
-        if (product) {
-            sessions[cartId].items.push(({productId, name: product.title, price: product.price}))
-            res.status(201).send();
-        } else {
-            res.status(404).send();
+    f.route({
+        url: "/cart/:cartId",
+        method: "POST",
+        schema: {
+            body: z.object({
+                productId: z.string()
+            }),
+            params: CartIdSchema,
+        },
+        handler: async (req, res) => {
+            const {cartId} = req.params;
+            const {productId} = req.body;
+            sessions[cartId] = sessions[cartId] || {id: cartId, items: []};
+            const product = await productRepo.findById(productId);
+
+            if (product) {
+                sessions[cartId].items.push(({productId, name: product.title, price: product.price}))
+                res.status(201).send();
+            } else {
+                res.status(404).send();
+            }
         }
     });
 
-    fastify.post("/checkout/:cartId", async (req: FastifyRequest<CartId>, res) => {
-        const {cartId} = req.params;
-        const cart = sessions[cartId];
-        if (!cart) {
-            throw new Error(`no cart with id ${cartId} was found`);
-        } else {
-
-            const order = await orderRepo.create({items: cart.items});
-            res.status(201).send(order.id);
+    f.route({
+        method: "POST",
+        url: "/checkout/:cartId",
+        schema: {
+            params: CartIdSchema,
+        },
+        handler: async (req, res) => {
+            const {cartId} = req.params;
+            const cart = sessions[cartId];
+            if (!cart) {
+                throw new Error(`no cart with id ${cartId} was found`);
+            } else {
+
+                const order = await orderRepo.create({items: cart.items});
+                res.status(201).send(order.id);
+            }
         }
     });
 
-    fastify.get("/order/:orderId", async (req: FastifyRequest<OrderId>, res) => {
-        const {orderId} = req.params;
-        const order = await orderRepo.findById(orderId);
-        if (order) {
-            res.send(order);
-        } else {
-            res.status(404).send(`Order with id ${orderId} was not found`);
+    f.route({
+        method: "GET",
+        url: "/order/:orderId",
+        schema: {
+            params: z.object({
+                orderId: z.string(),
+            })
+        },
+        handler: async (req, res) => {
+            const {orderId} = req.params;
+            const order = await orderRepo.findById(orderId);
+            if (order) {
+                res.send(order);
+            } else {
+                res.status(404).send(`Order with id ${orderId} was not found`);
+            }
         }
     });
 
 
 //TODO remove
-    fastify.post("/products", async (req, res) => {
-        const product = await productRepo.create(ProductTemplate.parse(req.body));
-        res.status(201).send(product);
+    f.route({
+        method: "POST",
+        url: "/products",
+        schema: {
+            body: ProductTemplate,
+        },
+        handler: async (req, res) => {
+            const product = await productRepo.create(req.body);
+            res.status(201).send(product);
+        }
     })
 
-    fastify.get("/products", async (_, res) => {
+    f.get("/products", async (_, res) => {
         res.send(await productRepo.findAll());
     })
 

diff --git a/yarn.lock b/yarn.lock
@@ -2727,6 +2727,7 @@ __metadata:
     "@types/morgan": ^1.9.5
     "@types/node": ^17.0.45
     fastify: ^4.23.2
+    fastify-type-provider-zod: ^1.1.9
     jest: ^28.1.3
     mongodb: ^4.17.1
     nanoid: ^4.0.2
@@ -4997,6 +4998,18 @@ __metadata:
   languageName: node
   linkType: hard
 
+"fastify-type-provider-zod@npm:^1.1.9":
+  version: 1.1.9
+  resolution: "fastify-type-provider-zod@npm:1.1.9"
+  dependencies:
+    zod-to-json-schema: ^3.17.1
+  peerDependencies:
+    fastify: ^4.0.0
+    zod: ^3.14.2
+  checksum: 86792031057cf3807a2e77ef41b16161d94c89ab95bd6284574502351df9c4d1e1621d4f7e7f3f14cd81aec9923c3a4f61c8889d5abb3b57e52ee9c0015056e1
+  languageName: node
+  linkType: hard
+
 "fastify@npm:^4.23.2":
   version: 4.23.2
   resolution: "fastify@npm:4.23.2"
@@ -9416,6 +9429,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"zod-to-json-schema@npm:^3.17.1":
+  version: 3.21.4
+  resolution: "zod-to-json-schema@npm:3.21.4"
+  peerDependencies:
+    zod: ^3.21.4
+  checksum: 899c1f461fb6547c0b08a265c82040c250be9b88d3f408f2f3ff77a418fdfad7549077e589d418fccb312c1f6d555c3c7217b199cc9072762e1fab20716dd2a6
+  languageName: node
+  linkType: hard
+
 "zod@npm:^3.22.2":
   version: 3.22.2
   resolution: "zod@npm:3.22.2"