MongoDB TypeScript Access/Refresh token with cookies boilerplate

Prerequisites

• Install dependencies

cd <project_name>
npm install
npm run tsc

• Build and run the project with auto reload (nodemon)

npm run server

• Build and run the project

npm run start

Finally, navigate to http://localhost:5000/ and you should see the API running!

MongoDB

Put the MongoURI string into the default.json file located in /config

The app uses a function called initAndPopulateDB() located in the server file, that populates the database with user data types only once. (Checks if the database already has data and wont update on subsequent runs)

Models

User

//Interface to model the user Schema for TypeScript.
@param email:string
@param password:string
@param avatar:string
@param userType:ref=> UserType._id

UserType

//Interface to model the user type Schema for TypeScript.
@param accessRights:string

Post

//Interface to model the Post Type schema for TypeScript.
 * @param title:string
 * @param content:string
 * @param author: ref => User._id
 * @param createdAt:Date
 * @param updatedAt:Date

AccessToken

//Interface to model the access token schema for TypeScript.
 * @param token:string
 * @param user: ref => User._id
 * @param expiration:Date 
 * @param createdAt:Date
 * @param updatedAt:Date
 * @param refreshToken: ref => RefreshToken._id
 * @param history: string[]

Refresh Token

//Interface to model the RefreshToken Schema for TypeScript.
 * @param token:string
 * @param user: ref => User._id
 * @param expiration:Date 
 * @param createdAt:Date
 * @param updatedAt:Date
 * @param valid: boolean

Routes

Register

**Requires email and password and passwordConfirm

***Middleware handles validation

****Controller also sets cookies

Route	Description
POST /register	Create new user from email and password

POST localhost:5000/register

{
  "email": "sample@gmail.com",
  "password": "123456",
  "passwordConfirm":"123456",
}

Response

{
    "user": "61a69c3975d6e0cd34b23f4f",
    "accessToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjp7Il9pZCI6IjYxYTY5YzM5NzVkNmUwY2QzNGIyM2Y0ZiJ9LCJpYXQiOjE2MzgzMDg5MjIsImV4cCI6MTYzODkxMzcyMn0.0tRxp_Fc_BSrjmBydMgdQuocLVwD0Q0Rpx6qdPY75XA",
    "refreshToken": "@@rt-a558f8b1-ea6a-4d43-903b-9407866a7bb6-db9337ec61-af6b90cd-c123-4f71-9605-9a315341d3f8@@",
    "accessTokenExpiration": "12/7/2021, 4:48:42 PM",
    "refreshTokenExpiration": "1/29/2022, 4:48:42 PM"
}

Posts

***Middleware handles validation

Route	Description
POST /posts	Create new post from middlewares token
GET /posts	Get personal users posts from access token in middleware
GET /posts/{id}	Get post with id
POST localhost:5000/posts

{
    "title":"title",
    "content":"jajamaru"
}

Response

{
    "_id": "61a6ab3ba7278cd1a08149b4",
    "title": "title",
    "content": "jajamaru",
    "author": "61a69c3975d6e0cd34b23f4f",
    "createdAt": "2021-11-30T22:52:43.412Z",
    "updatedAt": "2021-11-30T22:52:43.412Z",
    "__v": 0
}

Tokens

***Middleware handles validation

***Middleware also checks for and sets cookies

Route	Description
POST /token	Grants new tokens from email and password
POST /refresh	Grants new tokens from refresh token
POST localhost:5000/token/refresh

***Middleware searches headers/params/cookies for token***

Response

{
    "grandToken": {
        "accessToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VyIjp7Il9pZCI6IjYxYTY5YzM5NzVkNmUwY2QzNGIyM2Y0ZiJ9LCJpYXQiOjE2MzgzMTI5NDQsImV4cCI6MTYzODkxNzc0NH0.RixKAD-RslyRriTxvrbbAWHxbJAly7RcGHiclgMn8fA",
        "refreshToken": "@@rt-279659df-f8ca-41bf-a631-e3517455ba04-3ba8411b18-fa5b1b92-96c9-48a1-915e-591279ef0165@@",
        "user": "61a69c3975d6e0cd34b23f4f",
        "accessTokenExpiration": "12/7/2021, 5:55:44 PM",
        "refreshTokenExpiration": "1/29/2022, 5:59:31 PM"
    }
}

Project Structure

The most obvious difference in a TypeScript + Node project is the folder structure. In a TypeScript project, it's best to have separate source and distributable files. TypeScript (.ts) files live in your src folder and after compilation are output as JavaScript (.js) in the dist folder.

The full folder structure of this app is explained below:

Note! Make sure you have already built the app using npm run start

Name	Description
config	Contains config environment to be used by the config package, such as MongoDB URI, jwtSecret, and etc.
dist	Contains the distributable (or output) from your TypeScript build
node_modules	Contains all your npm dependencies
src	Contains your source code that will be compiled to the dist dir
src/database	Contains the initial data population for database and database connection
src/helpers	Contains the helpers for validating Mongo ID's and user as well as finding token location and setting cookies and generating hashed password
src/middleware	Contains middleware for login, registration and authentication. Checks for validation of values and for locations of tokens and validity of bearer tokens
src/models	Models defined are User, UserType, Post, AccessToken, RefreshToken
src/routes	Endpoints are /register, /auth, /posts, /token
src/services	Contains token service to handle logic pertaining to accessing tokens from database, creating new tokens and storing in database, and altering validity of tokens in database
src/utils	Contains utility functions designed to help with generating an avatar for the user as well as converting the user to a payload object for signing a new access token
src/server.ts	Entry point to your express app
package.json	File that contains npm dependencies as well as build scripts
tsconfig.json	Config settings for compiling server code written in TypeScript
tslint.json	Config settings for TSLint code style checking

Configuring TypeScript compilation

TypeScript uses the file tsconfig.json to adjust project compile options. Let's dissect this project's tsconfig.json, starting with the compilerOptions which details how your project is compiled.

    "compilerOptions": {
    "module": "commonjs",
    "esModuleInterop": true,
    "target": "es6",
    "noImplicitAny": true,
    "moduleResolution": "node",
    "sourceMap": true,
    "outDir": "dist",
    "baseUrl": ".",
    "paths": {
      "*": ["node_modules/*", "src/types/*"]
    }
  }

compilerOptions	Description
"module": "commonjs"	The output module type (in your .js files). Node uses commonjs, so that is what we use
"esModuleInterop": true,	Allows usage of an alternate module import syntax: import foo from 'foo';
"target": "es6"	The output language level. Node supports ES6, so we can target that here
"noImplicitAny": true	Enables a stricter setting which throws errors when something has a default any value
"moduleResolution": "node"	TypeScript attempts to mimic Node's module resolution strategy. Read more here
"sourceMap": true	We want source maps to be output along side our JavaScript. See the debugging section
"outDir": "dist"	Location to output .js files after compilation
"baseUrl": "."	Part of configuring module resolution. See path mapping section
paths: {...}	Part of configuring module resolution. See path mapping section

The rest of the file define the TypeScript project context. The project context is basically a set of options that determine which files are compiled when the compiler is invoked with a specific tsconfig.json. In this case, we use the following to define our project context:

    "include": [
        "src/**/*"
    ]

include takes an array of glob patterns of files to include in the compilation. This project is fairly simple and all of our .ts files are under the src folder.

Running the build

All the different build steps are orchestrated via npm scripts. Npm scripts basically allow us to call (and chain) terminal commands via npm. This is nice because most JavaScript tools have easy to use command line utilities allowing us to not need grunt or gulp to manage our builds. If you open package.json, you will see a scripts section with all the different scripts you can call. To call a script, simply run npm run <script-name> from the command line. You'll notice that npm scripts can call each other which makes it easy to compose complex builds out of simple individual build scripts. Below is a list of all the scripts this template has available:

Npm Script	Description
tsc	Transpiles TypeScript codes to JavaScript.
build	Cleans the previous build folder and rebuilds
clean	Removes old dist folder
compile	cleans/transpiles and starts the dist server
dev	runs nodemon on the dist folder, hot reloading on changes made in ts(cleans the old dist folder then rebuilds)

Since we're developing with TypeScript, it is important for the codes to be transpiled first to JavaScript before running the node server. It is best to deploy the app using: npm run compile command.