Add reference solution for the .env config.

.gitignore

@@ -1,2 +1,3 @@
 node_modules
-build
+build
+.env

example.env

@@ -0,0 +1,2 @@
+DB_CONNECTION_STRING=
+PORT=

package.json

@@ -15,6 +15,7 @@
   "license": "ISC",
   "description": "",
   "dependencies": {
+    "dotenv": "^16.4.5",
     "fastify": "^5.0.0",
     "pg": "^8.13.1",
     "pg-format": "^1.0.4"

requests.http

@@ -1,4 +1,4 @@
-@host = http://localhost:4400
+@host = http://localhost:4440
 
 ###
 

src/config.ts

@@ -0,0 +1,5 @@
+
+export const CONFIG = {
+  dbConnectionString: process.env.DB_CONNECTION_STRING!,
+  port: Number(process.env.PORT!)
+} as const

src/controller/app.ts

@@ -17,13 +17,13 @@ export default function createApp(options = {}, dependencies: Dependencies) {
 
   const app = fastify(options)
 
-  app.get('/api/pets', async () => {
+  app.get('/api/pets', async (request, reply) => {
     const pets = await petService.getAll();
-    return pets;
+    return {pets, message: 'success'};
   })
 
   type PostPetsRoute = {
-    Body: PetToCreate;
+    Body: PetToCreate
   }
   app.post<PostPetsRoute>('/api/pets', async (request, reply) => {
     const { body: petToCreate } = request;

src/db.ts

@@ -1,18 +1,21 @@
-import {Pool} from 'pg';
+import { Pool } from 'pg';
 
 export type DbClient = {
   query: <RowType>(query: string, params?: any[]) => Promise<RowType[] | RowType>;
 }
 
-export function createPgClient(): DbClient {
-  const pool = new Pool({
-    connectionString: 'postgres://postgres:dbpassword@localhost:5400/pets'
-  });
+type PgClientOptions = {
+  connectionString: string
+}
+export function createPgClient({ connectionString }:PgClientOptions): DbClient {
+  console.log('DB_CONNECTION_STRING', connectionString);
+
+
+  const pool = new Pool({ connectionString });
   return {
     async query(sql: string, params?: any[]) {
       const result = await pool.query(sql, params);
       return result.rows;
     }
-
   }
 }

src/server.ts

@@ -1,9 +1,11 @@
 import createApp from "./controller/app";
 import { createPgClient } from "./db";
+import 'dotenv/config';
+import { CONFIG } from './config';
 
-const PORT = 4400;
+const PORT = CONFIG.port;
 
-const dbClient = createPgClient();
+const dbClient = createPgClient({ connectionString: CONFIG.dbConnectionString });
 
 const options = {
   logger: {

tasks.md

@@ -45,7 +45,7 @@ Right now the user can provide any kind of body for the POST request. Ensure tha
 
 ## Task 2: Determines the reply's body
 
-Add a desired output schema (deserialization) to the `GET /api/pets` and `POST /api/pets`.
+Add a desired output schema (serialization) to the `GET /api/pets` and `POST /api/pets`.
 
 - What do you think what is the advantage of this?