Build Pluggable & Modular User Feature Module

🧑‍💼 User Feature Module (FastKit-style)

🧩 Description

Build a fully modular, pluggable, and class-based User module for managing user profiles. This module should expose a UserController class that can be directly used in any route with bind-safe methods.

Developers should be able to:

• Read, update, and delete user profiles

• Use class-based controller and service

• Validate user profile updates

• Plug in the controller with any route setup

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🧱 Why This Is Important

• 🎯 Every real app requires user management

• 🔁 Helps reuse clean logic across many services

• 🧼 Avoids repeating profile logic in multiple places

• 🧪 Makes it easy to test and customize per project

• 📦 Ready for monorepos, SaaS platforms, or admin panels

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🟢 Difficulty Level: Beginner → Intermediate

Requires understanding of:

• Express middleware and routing

• Modular folder structuring

• Class-based architecture

• Clean code separation (controller, service, validators)

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✅ Tasks

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1. 🧱 User Model (User.model.ts)

[ ] Define schema or model fields:

• id: string

• name: string

• email: string

• avatar?: string

• role_id?: string

• [ ] Make it DB-agnostic (can use Mongoose/Prisma/In-Memory)

2. 📜 Validators (User.validators.ts)

• [ ] Create validation schemas for:

• updateUser (e.g., name/email only)

• changePassword (if applicable)

• [ ] Use Zod or Joi

• [ ] Export as middleware

3. 🔧 Service Layer (User.service.ts)

• [ ] Business logic methods:

• getUserById(id)

• getAllUsers()

• updateUser(id, payload)

• deleteUser(id)

• [ ] Should return plain objects or throw errors

• No Express code

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4. 🎮 Controller (User.controller.ts)

• [ ] Class UserController with bind-safe methods:

• getUserById(req, res)

• getAllUsers(req, res)

• updateUser(req, res)

• deleteUser(req, res)

• [ ] Use corresponding service methods

• [ ] Handle HTTP response formatting

router.get('/user/:id', userController.getUserById);

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5. 🛡️ Middleware (Optional) (User.middleware.ts)

• [ ] Add auth middleware placeholder like:

• verifyUserOwnsAccountOrIsAdmin

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6. ❗ Constants (User.constant.ts)

• [ ] Add standard messages and error codes:

export const USER_ERRORS = {
  NOT_FOUND: 'User not found.',
  UPDATE_FAILED: 'Failed to update user.',
  UNAUTHORIZED: 'You are not allowed to access this user.'
};

7. 📘 README.md

Show how to:

• Import and use UserController

• Add validators before controller

• Customize the logic

• Keep usage copy-paste-ready

8. 🧪 Demo (User.demo.ts)

• [ ] Use all 4 main methods:

• Get single user

• Get all users

• Update a user

• Delete a user

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📁 Final Folder Structure

src/
└── features/
    └── User/
        └── v1/
            ├── User.controller.ts         # Main class
            ├── User.service.ts            # Business logic
            ├── User.validators.ts         # Validation middleware
            ├── User.constant.ts           # Error/status constants
            ├── User.utils.ts         # Utility Class 
            ├── User.model.ts              # Mongoose/DB schema
            ├── User.middleware.ts         # Optional auth/match check
            ├── User.demo.ts               # Sample usage
            └── README.md                  # Docs & setup guide

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🎯 Expected Outcome

[x] Reusable UserController class

[x] Standard get, update, delete operations

[x] Middleware-friendly (e.g. verifyToken)

[x] Clean separation of service and controller logic

[x] Easily integrated with any Express project

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🔐 Example Route Usage

import { verifyToken } from '../auth/Auth.middleware';
import { UserController, validateUpdateUser } from 'fastkit-user';



router.get('/users/:id', verifyToken, userController.getUserById);
router.get('/users', verifyToken, UserController.getAllUsers);
router.put('/users/:id', verifyToken, validateUpdateUser, UserController.updateUser);
router.delete('/users/:id', verifyToken, userController.deleteUser);

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🙋🏻‍♂️ Looking For

Contributions to:

• Add password update/reset endpoint

• Support profile image upload or avatar management

• Add admin filters: search by role, status, etc.

• Extend with pagination and soft