30 - May - 2023

Auth Service

Microservice Architecture...

• npm init -y
• yarn add -D typescript
• yarn add -D @types/express
• yarn add -D @types/cors
• yarn add -D ts-node-dev
• yarn add @types/bcrypt
• yarn add @types/jsonwebtoken
• yarn add @types/cookie-parser
• yarn add express
• yarn add cors
• yarn add mongoose
• yarn add dotenv
• yarn add winston have "node module" incompatible issue
• yarn add winston-daily-rotate-file
• yarn add zod have "node module" incompatible issue
• yarn add http-status
• yarn add bcrypt
• yarn add jsonwebtoken
• yarn add cookie-parser

tsc --init

"scripts": {
    "start": "ts-node-dev --respawn --transpile-only src/connection"
}

yarn start

Project coding rules setup

Package	Usage
Eslint	Enforce rules
Prettier	Code formatter
Eslint-Config-Prettier	format conflict resolver
Husky	Pre-commit hook - for check Eslint + Prettier rules
Lint-stage	Only check staging file change for git commit

• yarn add -D eslint
• yarn add -D @typescript-eslint/parser
• yarn add -D @typescript-eslint/eslint-plugin
• yarn add -D @typescript-eslint/eslint-plugin
• yarn add -D prettier
• yarn add -D eslint-config-prettier
• yarn add -D husky
• yarn husky install
• yarn add -D lint-staged have "node module" incompatible issue

nvm list

nvm install 18.16.0

nvm use 18.16.0 [run as administrator at cmd]

.eslintrc
.eslintignore
.prettierrc

"scripts": {
    "start": "ts-node-dev --respawn --transpile-only src/connection",
    "lint:check": "eslint --ignore-path .eslintignore --ext .js,.ts .",
    "lint:fix": "eslint . --fix",
    "prettier:check": "prettier --ignore-path .gitignore --write \"**/*.+(js|ts|json)\"",
    "prettier:fix": "prettier --write .",
    "lint-prettier": "yarn lint:check && yarn prettier:check"
},
"lint-staged": {
    "src/**/*.ts": "yarn lint-prettier"
},

yarn husky add .husky/pre-commit "yarn lint-staged"

Project Sections:-

• user
  • student
  • admin
  • faculty
• academy semester
• academy department
• academy faculty
• user auth login
• refresh token
• role base resource access

Learning Context:-

• File & Folder Structure...
• Project Architecture...
• Eslint Configuration
• TypeScript Implementation...
• User input verification by zod middleware
• User role base resource access
• Express Request type extend by index.d.ts
• HOC - Higher Order Function for async(req, res)
• by function call pick object property
• global error handling...
• Using of middleware concept
• CRUD Operation