TaskFlow - Real-Time Task Collaboration Platform

A full-stack task collaboration platform built with React, Node.js, MongoDB, and Socket.io. Similar to a lightweight Trello/Notion hybrid with real-time multi-user collaboration.

Live Demo: https://task-collab-beta.vercel.app

---

Table of Contents

1. Project Overview
2. Functional Requirements
3. Technical Stack
4. Frontend Architecture
5. Backend Architecture
6. Database Schema
7. API Contract Design
8. Real-Time Synchronization Strategy
9. Scalability Considerations
10. Setup & Installation
11. Project Structure
12. Testing Guide

---

Project Overview

TaskFlow is a collaborative task management application that allows teams to:

• Create and manage project boards
• Organize tasks into customizable lists
• Assign tasks to team members
• Drag-and-drop tasks across lists in real-time
• Track activity history for all board actions
• Collaborate seamlessly with multiple users simultaneously

Key Features

• Real-time multi-user collaboration via WebSockets
• User authentication with JWT tokens
• Activity history tracking with detailed event logging
• Board membership management (users can join shared boards)
• Responsive design with dark theme UI
• Search and pagination for tasks

---

Functional Requirements

1. User Authentication

• Users can register with email and password
• Users can login with credentials
• JWT token-based authentication
• Persistent session management via localStorage
• User profile with name and email

2. Board Management

• Create boards (becomes owner/member automatically)
• View all boards user is member of
• Join existing boards via shared links
• View board with all members
• Real-time member updates

3. List Management

• Create multiple lists within a board
• Lists act as columns/stages (To Do, In Progress, Done, etc.)
• Automatic sorting by position
• Lists populate with associated tasks

4. Task Management

• Create tasks within lists
• Update task title, description, status
• Delete tasks
• Assign tasks to board members
• Drag-and-drop tasks between lists
• Position-based ordering within lists

5. Real-Time Collaboration

• Multi-user simultaneous editing
• Real-time task creation/update/deletion
• Real-time task movement between lists
• Instant updates across all connected clients

6. Activity Tracking

• Log all user actions
• Display activity history in timeline format
• Show user attribution for each action
• Track specific changes (assignments, status changes)

---

Technical Stack

Frontend

• Framework: React 18.3.1
• Routing: React Router 6.28.0
• State Management: Zustand (lightweight alternative to Redux)
• Real-Time: Socket.io client
• Drag & Drop: @hello-pangea/dnd
• UI Components: Radix UI (accessible component library)
• Styling: Tailwind CSS with custom dark theme
• HTTP Client: Axios
• Deploy: Vercel

Backend

• Framework: Express.js 5.2.1
• Database: MongoDB 9.2.1
• Real-Time: Socket.io 4.8.3
• Authentication: JWT + bcryptjs
• CORS: Configured with environment variables
• Deploy: Node.js (Vercel/Railway/Heroku compatible)

Database

• MongoDB: NoSQL document database
• Collections: Users, Boards, Lists, Tasks, Activities
• Indexing: Optimized indexes for fast queries

---

Frontend Architecture

Component Structure

frontend/src/
├── components/
│   ├── board/              # Board-related components
│   │   ├── ActivityPanel.jsx       # Activity history sidebar
│   │   ├── ListColumn.jsx          # Individual list column
│   │   ├── TaskCard.jsx            # Task card display
│   │   └── TaskModal.jsx           # Task creation/edit modal
│   ├── layout/             # Layout components
│   │   └── ProtectedRoute.jsx      # Auth-protected routes
│   ├── landing/            # Marketing/landing components
│   ├── auth/               # Auth components
│   └── ui/                 # Reusable UI components (button, input, etc.)
├── pages/
│   ├── LandingPage.jsx
│   ├── LoginPage.jsx
│   ├── RegisterPage.jsx
│   ├── DashboardPage.jsx   # Boards overview
│   └── BoardPage.jsx       # Main board workspace
├── services/
│   ├── api.js              # Axios API client with interceptors
│   └── socket.js           # Socket.io connection and events
├── store/
│   ├── authStore.js        # Zustand auth store
│   └── boardStore.js       # Zustand board/list/task store
├── lib/
│   └── utils.js            # Utility functions
└── App.jsx

State Management (Zustand)

AuthStore

useAuthStore: {
  user: { _id, name, email, id },      // Current user
  token: "jwt_token",                  // JWT token
  isAuthenticated: boolean,            // Auth status
  setAuth(user, token),               // Login/Register
  logout(),                           // Logout
  updateUser(updates)                 // Update profile
}

BoardStore

useBoardStore: {
  currentBoard: Board,                 // Active board
  lists: List[],                       // Lists with tasks
  setCurrentBoard(board, lists),       // Load board data
  addList(list),                       // Create list
  addTask(task),                       // Create task
  updateTask(task),                    // Update task
  deleteTask(taskId),                  // Delete task
  moveTask(task),                      // Move task to different list
  reorderTasksLocally()                // Optimistic UI update
}

Data Flow

User Action
    ↓
Component calls store/API method
    ↓
Optimistic UI update (if applicable)
    ↓
API request to backend
    ↓
Backend processes & broadcasts via socket
    ↓
Store updates via socket listener
    ↓
Component re-renders with updated data

Key Features

State Management:

• Zustand for lightweight, efficient state
• Persisted authentication in localStorage
• Normalized board/list/task structure for easy updates

Socket Communication:

Socket Events:
  - joinBoard(boardId)        → Join board room
  - taskCreated               ← Server broadcast
  - taskUpdated               ← Server broadcast
  - taskMoved                 ← Server broadcast
  - taskDeleted               ← Server broadcast

API Client:

• Axios instance with JWT token interceptor
• Automatic token attachment to all requests
• Global 401 handling for session expiry

---

Backend Architecture

Express Application Structure

backend/src/
├── server.js               # Main Express app & Socket.io setup
├── config/
│   └── db.js              # MongoDB connection
├── models/                # Mongoose schemas
│   ├── User.js            # User schema
│   ├── Board.js           # Board schema
│   ├── List.js            # List schema
│   ├── Task.js            # Task schema
│   └── Activity.js        # Activity log schema
├── controllers/           # Business logic
│   ├── auth.controller.js
│   ├── board.controller.js
│   ├── list.controller.js
│   ├── task.controller.js
│   └── activity.controller.js
├── routes/               # API endpoints
│   ├── auth.routes.js
│   ├── board.routes.js
│   ├── list.routes.js
│   ├── task.routes.js
│   └── activity.routes.js
├── middleware/           # Custom middleware
│   ├── auth.middleware.js     # JWT verification
│   └── error.middleware.js    # Error handling
├── utils/
│   └── activityLogger.js  # Activity logging utility
└── .env                   # Environment variables

Middleware Stack

CORS Handler:

• Whitelist local development URLs (localhost:3000, :5173, :5174)
• Whitelist production frontend (https://task-collab-beta.vercel.app)
• Allow credentials for JWT tokens
• Support preflight requests

Auth Middleware:

Endpoint Protection:
  - Extracts JWT from Authorization header
  - Verifies token signature
  - Attaches user.id to request
  - Rejects if token invalid/expired

Error Handler:

• Centralized error catching
• Consistent error response format
• Status code mapping

Database Connection

• MongoDB Atlas or local MongoDB
• Connection pooling for performance
• Reconnection logic for resilience

---

Database Schema

Database Relationships

User (1) ──────────────> (N) Board
         owns/member
         
Board (1) ──────────────> (N) List
         contains
         
Board (1) ──────────────> (N) Task
         contains
         
List (1) ──────────────> (N) Task
         contains
         
User (1) ──────────────> (N) Task
         assigned
         
User (1) ──────────────> (N) Activity
         performs

Collection Schemas

Users Collection

{
  _id: ObjectId,
  name: String,              // e.g., "John Doe"
  email: String,             // Unique email
  password: String,          // Hashed password (bcrypt)
  createdAt: Date,
  updatedAt: Date
}

Boards Collection

{
  _id: ObjectId,
  title: String,             // e.g., "Website Redesign"
  owner: ObjectId,           // Reference to User
  members: [ObjectId],       // Array of User IDs
  createdAt: Date,
  updatedAt: Date
}

Indexes:
  - members: For fast user membership queries

Lists Collection

{
  _id: ObjectId,
  title: String,             // e.g., "To Do", "In Progress"
  boardId: ObjectId,         // Reference to Board
  position: Number,          // Order within board (0, 1, 2...)
  createdAt: Date,
  updatedAt: Date
}

Indexes:
  - boardId + position: For fast list retrieval and sorting

Tasks Collection

{
  _id: ObjectId,
  title: String,             // Task title
  description: String,       // Task details (optional)
  listId: ObjectId,          // Reference to List
  boardId: ObjectId,         // Reference to Board (denormalized)
  assignedTo: [ObjectId],    // Array of User IDs (supports multiple)
  status: String,            // "todo", "in-progress", "done", "blocked"
  position: Number,          // Order within list
  dueDate: Date,             // Optional due date
  createdAt: Date,
  updatedAt: Date
}

Indexes:
  - boardId + position: For fast task retrieval
  - listId: For list-specific queries
  - title: Full-text search index

Activities Collection

{
  _id: ObjectId,
  user: ObjectId,            // Reference to User (who performed action)
  action: String,            // E.g., "created task", "updated task"
  details: String,           // Detailed action description
  taskId: ObjectId,          // Reference to Task (if applicable)
  boardId: ObjectId,         // Reference to Board
  assignedToUser: ObjectId,  // User assigned to task (if applicable)
  changes: Object,           // Fields that changed (for updates)
  createdAt: Date,
  updatedAt: Date
}

Indexes:
  - boardId + createdAt (-1): For activity timeline queries

Query Optimization

Common Queries:

1. Get user's boards with members

   db.boards.find({ members: userId }).populate('members')

2. Get board with all lists and tasks

   db.lists.find({ boardId })
   db.tasks.find({ boardId }).populate('assignedTo')

3. Get activity timeline

   db.activities.find({ boardId }).sort({ createdAt: -1 }).limit(100)

4. Search tasks

   db.tasks.find({ boardId, title: { $regex: query } }).limit(20)

---

API Contract Design

Authentication Endpoints

POST /api/auth/register

Register new user

Request:
{
  name: String,
  email: String,
  password: String (min 6 chars)
}

Response (201):
{
  _id: String,
  name: String,
  email: String,
  token: String (JWT)
}

Error (400):
{ message: "User exists" }

POST /api/auth/login

Login with credentials

Request:
{
  email: String,
  password: String
}

Response (200):
{
  _id: String,
  name: String,
  email: String,
  token: String (JWT)
}

Error (401):
{ message: "Invalid credentials" }

Board Endpoints

GET /api/boards

Get all boards user is member of

Response (200):
[ Board, Board, ... ]

Headers: Authorization: Bearer {token}

POST /api/boards

Create new board

Request:
{
  title: String
}

Response (201):
{
  _id: String,
  title: String,
  owner: ObjectId,
  members: [ObjectId]
}

GET /api/boards/:boardId

Get board details with lists and tasks

Response (200):
{
  board: {
    _id: String,
    title: String,
    owner: ObjectId,
    members: [ { _id, name, email } ]
  },
  lists: [
    {
      _id: String,
      title: String,
      position: Number,
      tasks: [ Task, Task, ... ]
    }
  ]
}

POST /api/boards/:boardId/join

Join an existing board

Response (200):
{
  message: "Joined board successfully",
  board: Board,
  lists: List[]
}

Error (400):
{ message: "User is already a member" }

List Endpoints

POST /api/lists

Create new list

Request:
{
  title: String,
  boardId: String,
  position: Number
}

Response (201):
{
  _id: String,
  title: String,
  boardId: String,
  position: Number
}

Task Endpoints

POST /api/tasks

Create new task

Request:
{
  title: String,
  description: String (optional),
  listId: String,
  boardId: String,
  assignedTo: [String] (optional - array of user IDs),
  status: String (default: "todo"),
  dueDate: Date (optional)
}

Response (201):
Task object with all fields

Socket Event:
io.to(boardId).emit('taskCreated', task)

PATCH /api/tasks/:taskId

Update task

Request: (any fields to update)
{
  title: String,
  description: String,
  status: String,
  assignedTo: [String],
  dueDate: Date
}

Response (200):
Updated Task object

Socket Event:
io.to(boardId).emit('taskUpdated', task)

DELETE /api/tasks/:taskId

Delete task

Response (200):
{ message: "Task deleted" }

Socket Event:
io.to(boardId).emit('taskDeleted', taskId)

PATCH /api/tasks/move/:taskId

Move task to different list

Request:
{
  sourceListId: String,
  destinationListId: String,
  newPosition: Number
}

Response (200):
Updated Task object

Socket Event:
io.to(boardId).emit('taskMoved', task)

Activity Endpoints

GET /api/activities/:boardId

Get activity history for board

Response (200):
[
  {
    _id: String,
    user: { _id, name, email },
    action: String,
    details: String,
    assignedToUser: { _id, name, email } (if applicable),
    taskId: String,
    boardId: String,
    createdAt: Date
  }
]

Limit: 100 most recent activities
Sort: Newest first

---

Real-Time Synchronization Strategy

WebSocket Architecture

Socket.io Setup:

Server: new Server(server, { cors: corsOptions })
Client: io(BASE_URL)

Connection Flow:

1. User navigates to board page
   → Frontend calls connectSocket()
   → Socket connects to server

2. Socket.on('connect')
   → Emit 'joinBoard' with boardId
   → Server joins socket to room (boardId)

3. User performs action (create/update/delete task)
   → Frontend sends API request
   → Backend processes & emits socket event
   → All sockets in room receive update
   → Store listener processes event
   → UI re-renders with new data

Socket Events

Client → Server:

socket.emit('joinBoard', boardId)
  - Joins user to board-specific room
  - Called when viewing board page

socket.disconnect()
  - Implicit when leaving page
  - Server removes from room

Server → Client (Broadcasts):

io.to(boardId).emit('taskCreated', task)
io.to(boardId).emit('taskUpdated', task)
io.to(boardId).emit('taskMoved', task)
io.to(boardId).emit('taskDeleted', taskId)

Real-Time Update Flow

Example: User updates task status

Frontend:
1. User clicks status dropdown → select "Done"
2. Component calls: tasksAPI.update(taskId, { status: 'done' })
3. Optimistic UI update: updateTask() in store
4. Loading state shown to user

Backend:
5. Receives PATCH /api/tasks/:taskId with { status: 'done' }
6. Updates MongoDB record
7. Returns updated task
8. Broadcasts: io.to(boardId).emit('taskUpdated', task)
9. Logs activity

Frontend Listeners:
10. socket.on('taskUpdated') fires
11. Store listener: updateTask(task)
12. Zustand store updates
13. Component re-renders
14. All connected users see update instantly

Conflict Resolution

Optimistic Updates:

• Frontend updates UI immediately
• If API fails, revert to previous state
• User sees instant feedback

Last-Write-Wins:

• If two users edit same field simultaneously
• Last API request wins
• Server time is source of truth
• Activity log captures both actions

Position Conflicts:

• When moving tasks between lists
• Server increments positions
• Other tasks reordered automatically
• No manual conflict resolution needed

Activity Logging & Real-Time

Logging happens server-side:

// After task update
await logActivity({
  user: req.user.id,
  action: "updated task",
  details: "changed task status to done",
  taskId: task._id,
  boardId: task.boardId,
  changes: { status: 'done' }
})

Activity fetched on demand:

// Client requests activity when panel opened
const { data } = await activitiesAPI.getByBoard(boardId)
// Returns last 100 activities sorted newest first

---

Scalability Considerations

Current Architecture Limitations

1. Single Server Instance

• Current: Single Node.js server handles all connections
• Bottleneck: One server can handle ~10k concurrent connections

2. In-Memory Socket Rooms

• Current: Socket.io stores rooms in server memory
• Issue: If server crashes, connections lost

3. Database Queries

• Current: Queries on every request
• Issue: No caching strategy

Scaling Strategies

Horizontal Scaling (Multiple Servers)

Problem: Socket.io rooms only exist on one server

Solution: Socket.io Adapter

import { createAdapter } from "@socket.io/redis-adapter";
import { createClient } from "redis";

const pubClient = createClient();
const subClient = pubClient.duplicate();

io.adapter(createAdapter(pubClient, subClient));

With Redis adapter:

• Multiple servers share socket connections
• Broadcasts reach all servers
• Rooms span multiple instances

Load Balancing

Setup:

Internet
    ↓
Load Balancer (Nginx/HAProxy)
    ↓
├─ Server 1 (Node.js + Socket.io)
├─ Server 2 (Node.js + Socket.io)
└─ Server 3 (Node.js + Socket.io)
    ↓
MongoDB Cluster

Sticky Sessions Requirement:

• Socket.io users must connect to same server for reconnection
• Load balancer tracks user → server mapping
• Redis handles state across servers

Caching Strategy

Redis Cache:

// Cache board details (5 minute TTL)
const cacheKey = `board:${boardId}`;
const cached = await redis.get(cacheKey);

if (!cached) {
  const board = await Board.findById(boardId).populate('members');
  await redis.setex(cacheKey, 300, JSON.stringify(board));
}

// Invalidate on update
await redis.del(cacheKey);

Benefits:

• Reduce database queries by 70%
• Faster API responses
• Reduce MongoDB load

Database Optimization

Current Indexes:

// boards
db.boards.createIndex({ members: 1 })

// lists
db.lists.createIndex({ boardId: 1, position: 1 })

// tasks
db.tasks.createIndex({ boardId: 1 })
db.tasks.createIndex({ listId: 1 })
db.tasks.createIndex({ title: "text" })

// activities
db.activities.createIndex({ boardId: 1, createdAt: -1 })
db.activities.createIndex({ createdAt: -1 })

Future Optimizations:

// Sharding by boardId for massive scale
db.tasks.createIndex({ boardId: 1, _id: 1 })

// Materialized views for activity counts
db.activitySummary.createIndex({ boardId: 1, userId: 1 })

// Document-level encryption for sensitive data

Microservices Architecture (Future)

API Gateway
    ├─ Auth Service
    ├─ Board Service
    ├─ Task Service
    ├─ Activity Service
    └─ Notification Service

Shared Services:
    ├─ MongoDB Cluster
    ├─ Redis Cluster
    └─ Message Queue (RabbitMQ/Kafka)

CDN & Static Asset Delivery

Current:

• Frontend deployed to Vercel (auto-handled)
• API calls to backend

Improvements:

• CloudFront/CloudFlare for API caching
• Gzip compression
• HTTP/2 push
• Image optimization

Database Connection Pooling

Current:

mongoose.connect(MONGO_URI)
// Default pool size: 10

Optimized:

mongoose.connect(MONGO_URI, {
  maxPoolSize: 50,           // For production
  minPoolSize: 10,
  socketTimeoutMS: 45000,
  serverSelectionTimeoutMS: 5000
})

Rate Limiting

const rateLimit = require('express-rate-limit');

const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100                   // limit each IP to 100 requests per windowMs
});

app.use('/api/', limiter);

Monitoring & Observability

Recommended Tools:

• New Relic / DataDog for APM
• Sentry for error tracking
• ELK Stack for logging
• PromQL/Grafana for metrics

// Add request logging
app.use((req, res, next) => {
  const start = Date.now();
  res.on('finish', () => {
    const duration = Date.now() - start;
    console.log(`${req.method} ${req.path} - ${duration}ms`);
  });
  next();
});

---

Setup & Installation

Prerequisites

• Node.js 16+ and npm
• MongoDB (local or Atlas)
• Git

Environment Setup

Backend (.env file)

# Server
PORT=5000

# Database
MONGO_URI=mongodb://localhost:27017/taskflow

# Authentication
JWT_SECRET=your_super_secret_jwt_key_change_in_production

# Frontend URL (for CORS)
FRONTEND_URL=https://task-collab-beta.vercel.app

Frontend (vite.config.js)

const API_URL = import.meta.env.VITE_API_URL || 'http://localhost:5000/api'

Installation Steps

1. Clone repository

git clone <repository-url>
cd task_collab

2. Backend Setup

cd backend
npm install
npm run dev

Server will start on http://localhost:5000

3. Frontend Setup (in new terminal)

cd frontend
npm install
npm run dev

App will open on http://localhost:5173

4. Access Application

• Open browser to http://localhost:5173
• Register account
• Create board and invite teammates

Deployment

Frontend Deployment (Vercel)

cd frontend
vercel deploy

Backend Deployment

Option 1: Vercel (Node.js)

cd backend
vercel deploy

Option 2: Railway.app

# Connected via GitHub
# Auto-deploys on push

Option 3: Digital Ocean / Heroku

# Configure add-ons: MongoDB Atlas, Redis
# Deploy via CLI or GitHub integration

---

Project Structure

task_collab/
├── frontend/
│   ├── src/
│   │   ├── components/
│   │   │   ├── board/
│   │   │   │   ├── ActivityPanel.jsx
│   │   │   │   ├── ListColumn.jsx
│   │   │   │   ├── TaskCard.jsx
│   │   │   │   └── TaskModal.jsx
│   │   │   ├── layout/
│   │   │   ├── landing/
│   │   │   ├── auth/
│   │   │   └── ui/
│   │   ├── pages/
│   │   │   ├── LandingPage.jsx
│   │   │   ├── LoginPage.jsx
│   │   │   ├── RegisterPage.jsx
│   │   │   ├── DashboardPage.jsx
│   │   │   └── BoardPage.jsx
│   │   ├── services/
│   │   │   ├── api.js
│   │   │   └── socket.js
│   │   ├── store/
│   │   │   ├── authStore.js
│   │   │   └── boardStore.js
│   │   ├── lib/
│   │   │   └── utils.js
│   │   └── App.jsx
│   ├── public/
│   ├── index.html
│   ├── package.json
│   ├── vite.config.js
│   └── tailwind.config.js
│
├── backend/
│   ├── src/
│   │   ├── server.js
│   │   ├── config/
│   │   │   └── db.js
│   │   ├── models/
│   │   │   ├── User.js
│   │   │   ├── Board.js
│   │   │   ├── List.js
│   │   │   ├── Task.js
│   │   │   └── Activity.js
│   │   ├── controllers/
│   │   │   ├── auth.controller.js
│   │   │   ├── board.controller.js
│   │   │   ├── list.controller.js
│   │   │   ├── task.controller.js
│   │   │   └── activity.controller.js
│   │   ├── routes/
│   │   │   ├── auth.routes.js
│   │   │   ├── board.routes.js
│   │   │   ├── list.routes.js
│   │   │   ├── task.routes.js
│   │   │   └── activity.routes.js
│   │   ├── middleware/
│   │   │   ├── auth.middleware.js
│   │   │   └── error.middleware.js
│   │   └── utils/
│   │       └── activityLogger.js
│   ├── .env
│   ├── .env.example
│   ├── package.json
│   └── README.md
│
└── README.md (this file)

---

Testing Guide

Frontend Testing

Test 1: User Authentication

1. Register: name, email, password
2. Verify username shows correctly
3. Login with credentials
4. Check JWT token in localStorage

Test 2: Board Management

1. Create board
2. Verify owner/member status
3. Join board with second user(copy the url and paste it in browser 2 , where u logged in as another user)
4. Verify member list updates

Test 3: Task Operations

1. Create list in board
2. Create task in list
3. Assign task to team member
4. Verify assignment in dropdown
5. Drag task to different list
6. Verify position updated

Test 4: Real-Time Sync

1. Open board in two browser windows
2. Create task in first window
3. Verify task appears instantly in second window
4. Update status in second window
5. Verify update appears in first window

Test 5: Activity Tracking

1. Perform multiple actions
2. Open Activity panel
3. Verify all actions logged
4. Verify user names displayed correctly
5. Verify timestamps accurate

Backend API Testing (Postman/Curl)

Register User

curl -X POST http://localhost:5000/api/auth/register \
  -H "Content-Type: application/json" \
  -d '{"name":"John","email":"john@test.com","password":"test123"}'

Create Board

curl -X POST http://localhost:5000/api/boards \
  -H "Authorization: Bearer {token}" \
  -H "Content-Type: application/json" \
  -d '{"title":"My Board"}'

Get Activities

curl http://localhost:5000/api/activities/{boardId} \
  -H "Authorization: Bearer {token}"

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Performance Metrics

Target Metrics

• API Response Time: < 200ms (p95)
• Task Update Latency: < 100ms (real-time)
• Page Load Time: < 3s
• Database Query Time: < 50ms (p95)

Monitoring

Current Monitoring:

• Browser DevTools (Network tab)
• Console logs for socket events
• Network tab for API calls

Production Monitoring (Recommended):

• New Relic APM
• Sentry error tracking
• CloudWatch/DataDog metrics

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Code Quality

Frontend Standards

• ESLint configuration: React best practices
• Prettier for code formatting
• Responsive design (mobile-first)
• Accessibility (WCAG 2.1 AA)

Backend Standards

• Consistent error handling
• Input validation on all endpoints
• Rate limiting for API endpoints
• CORS configured properly
• Logging for debugging

Testing Coverage

• Unit tests for utilities
• Integration tests for API endpoints
• E2E tests for user flows
• Socket.io event testing

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Known Limitations & Future Improvements

Current Limitations

1. Single-server deployment (no clustering)
2. No payment processing
3. No email notifications
4. Limited user roles (owner/member only)
5. No file attachments on tasks
6. No task comments/discussions

Future Roadmap

1. Add Redis for caching & clustering
2. Implement user roles (viewer, editor, admin)
3. Add task comments and @mentions
4. File attachments with cloud storage
5. Email notifications for assignments
6. Mobile app (React Native)
7. GraphQL API as alternative
8. Dark/Light theme toggle
9. Task templates
10. Workspace teams management

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Contributing

Contributions welcome! Please:

1. Fork repository
2. Create feature branch
3. Submit pull request
4. Follow code standards

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License

MIT License - See LICENSE file for details

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Support

For issues or questions:

• GitHub Issues
• Email: support@taskflow.app
• Documentation: https://docs.taskflow.app

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Credits

Built as a full-stack engineering interview assignment demonstrating:

• Modern React patterns and state management
• RESTful API design
• Real-time WebSocket communication
• Database modeling and optimization
• Scalability considerations
• Code quality and maintainability

Technologies: React, Node.js, Express, MongoDB, Socket.io, Tailwind CSS, Zustand

Live Demo: https://task-collab-beta.vercel.app