Digital Transformation Education Platform

Comprehensive Technical & Feature Documentation

Executive Summary
Platform Overview
Technical Architecture
Technology Stack
Database Design
- 5.3 Current Seed Data
Feature Specifications
User Roles & Permissions
Payment & Monetization
Quiz & Assessment System
Gamification System
Analytics & Reporting
Security Implementation
Third-Party Integrations
API Specifications
Deployment Strategy
Development Phases

1. Executive Summary

This document outlines the comprehensive architecture and features for a robust digital transformation education platform. The platform enables users to:

Purchase premium courses with secure Stripe payment integration
Access free courses for skill development
Take interactive quizzes with instant feedback
Practice skills through hands-on exercises
Track progress with detailed analytics
Earn certificates and badges upon completion
Engage with gamification elements for motivation

The platform is built on modern web technologies prioritizing scalability, performance, and user experience.

2. Platform Overview

2.1 Vision Statement

A comprehensive e-learning platform focused on digital transformation skills, providing accessible education through a combination of free and premium content, interactive assessments, and practical exercises.

2.2 Target Audience

Audience Segment	Description
Individual Learners	Professionals seeking to upskill in digital transformation
Corporate Teams	Organizations training employees on digital tools
Students	Academic learners exploring technology careers
Career Changers	Individuals transitioning into tech roles

2.3 Core Value Propositions

Accessible Learning: Free courses alongside premium content
Practical Focus: Hands-on exercises and real-world projects
Certification: Industry-recognized completion certificates
Flexible Pacing: Self-paced learning with progress tracking
Community: Discussion forums and peer interaction

3. Technical Architecture

3.1 Architecture Overview

The platform follows a modular monolith architecture initially, with the capability to evolve into microservices as scaling demands increase. This approach balances development speed with future scalability.

┌─────────────────────────────────────────────────────────────────┐
│                        CLIENT LAYER                              │
│  ┌─────────────┐  ┌─────────────┐  ┌─────────────────────────┐  │
│  │   Web App   │  │ Mobile PWA  │  │   Admin Dashboard       │  │
│  │  (React/    │  │  (React +   │  │   (React Admin)         │  │
│  │   Next.js)  │  │   PWA)      │  │                         │  │
│  └─────────────┘  └─────────────┘  └─────────────────────────┘  │
└─────────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────────┐
│                       API GATEWAY LAYER                          │
│  ┌─────────────────────────────────────────────────────────────┐│
│  │              Express.js API Gateway                          ││
│  │    (Rate Limiting, Auth, Logging, Request Routing)          ││
│  └─────────────────────────────────────────────────────────────┘│
└─────────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────────┐
│                    APPLICATION LAYER                             │
│  ┌──────────────┐ ┌──────────────┐ ┌──────────────┐             │
│  │    Auth      │ │   Course     │ │    Quiz      │             │
│  │   Module     │ │   Module     │ │   Module     │             │
│  └──────────────┘ └──────────────┘ └──────────────┘             │
│  ┌──────────────┐ ┌──────────────┐ ┌──────────────┐             │
│  │   Payment    │ │   User       │ │  Analytics   │             │
│  │   Module     │ │   Module     │ │   Module     │             │
│  └──────────────┘ └──────────────┘ └──────────────┘             │
│  ┌──────────────┐ ┌──────────────┐ ┌──────────────┐             │
│  │ Gamification │ │   Video      │ │ Notification │             │
│  │   Module     │ │  Streaming   │ │   Module     │             │
│  └──────────────┘ └──────────────┘ └──────────────┘             │
└─────────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────────┐
│                      DATA LAYER                                  │
│  ┌──────────────┐ ┌──────────────┐ ┌──────────────┐             │
│  │  MongoDB     │ │    Redis     │ │  Cloudinary/ │             │
│  │   Atlas      │ │   Cache      │ │  Bunny CDN   │             │
│  └──────────────┘ └──────────────┘ └──────────────┘             │
└─────────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────────┐
│                 EXTERNAL SERVICES                                │
│  ┌──────────┐ ┌──────────┐ ┌──────────┐ ┌──────────┐            │
│  │  Stripe  │ │ SendGrid │ │  AWS S3  │ │ Firebase │            │
│  │ Payments │ │  Email   │ │ Storage  │ │   Auth   │            │
│  └──────────┘ └──────────┘ └──────────┘ └──────────┘            │
└─────────────────────────────────────────────────────────────────┘

3.2 Content Hierarchy

Categories (hierarchical with parent/child)
    └── Courses
            └── Modules
                    └── Lessons
                            ├── Article (HTML content)
                            └── Quiz (linked to Quiz collection)

3.3 Key Architecture Principles

Separation of Concerns: Clear boundaries between modules
API-First Design: RESTful APIs with optional GraphQL
Event-Driven Communication: For async operations (notifications, analytics)
Caching Strategy: Multi-tier caching (Browser → CDN → Redis → Database)
Horizontal Scalability: Stateless services for easy scaling

4. Technology Stack

4.1 Frontend Stack

Technology	Purpose	Justification
React 18+	UI Framework	Component-based, large ecosystem, excellent DX
Next.js 14+	React Framework	SSR/SSG, routing, API routes, SEO optimization
TypeScript	Type Safety	Maintainability, better IDE support, fewer bugs
TanStack Query	Server State	Caching, background updates, optimistic updates
Zustand/Redux Toolkit	Client State	Lightweight, predictable state management
Tailwind CSS	Styling	Utility-first, rapid development, consistent design
Shadcn/ui	UI Components	Accessible, customizable component library
React Hook Form	Form Handling	Performance, validation, easy integration
Zod	Schema Validation	TypeScript-first validation
Framer Motion	Animations	Smooth, declarative animations

4.2 Backend Stack

Technology	Purpose	Justification
Node.js 20+	Runtime	Non-blocking I/O, JavaScript ecosystem
Express.js	Web Framework	Mature, flexible, extensive middleware
TypeScript	Type Safety	Consistent with frontend, better maintainability
MongoDB Atlas	Database	Flexible schema, horizontal scaling, managed service
Mongoose	ODM	Schema validation, middleware, query building
Redis	Caching/Sessions	In-memory speed, pub/sub, session storage
Bull/BullMQ	Job Queues	Background jobs, scheduled tasks, retries
Socket.io	Real-time	WebSocket abstraction, fallbacks
Winston	Logging	Structured logging, multiple transports
Jest	Testing	Unit/integration testing

4.3 DevOps & Infrastructure

Technology	Purpose
Docker	Containerization
Docker Compose	Local development
GitHub Actions	CI/CD pipelines
Vercel/Railway	Frontend/Backend hosting
MongoDB Atlas	Managed database
Cloudflare	CDN, DDoS protection
Bunny CDN	Video streaming CDN
AWS S3	File storage
Sentry	Error monitoring
LogRocket	Session replay

4.4 Development Tools

Tool	Purpose
ESLint + Prettier	Code quality & formatting
Husky	Git hooks
Commitlint	Commit message standards
Playwright/Cypress	E2E testing
Storybook	Component documentation
Swagger/OpenAPI	API documentation

5. Database Design

5.1 MongoDB Collections Schema

Users Collection

{
  _id: ObjectId,
  email: String (unique, indexed),
  passwordHash: String,
  profile: {
    firstName: String,
    lastName: String,
    avatar: String (URL),
    bio: String,
    timezone: String,
    language: String
  },
  role: String (enum: ['student', 'instructor', 'admin', 'superadmin']),
  subscription: {
    plan: String (enum: ['free', 'basic', 'premium', 'enterprise']),
    stripeCustomerId: String,
    stripeSubscriptionId: String,
    currentPeriodStart: Date,
    currentPeriodEnd: Date,
    status: String (enum: ['active', 'canceled', 'past_due', 'trialing'])
  },
  gamification: {
    points: Number,
    level: Number,
    badges: [{ badgeId: ObjectId, earnedAt: Date }],
    streak: {
      current: Number,
      longest: Number,
      lastActivityDate: Date
    }
  },
  preferences: {
    emailNotifications: Boolean,
    pushNotifications: Boolean,
    darkMode: Boolean
  },
  socialAuth: {
    google: { id: String, email: String },
    github: { id: String, username: String }
  },
  createdAt: Date,
  updatedAt: Date,
  lastLoginAt: Date,
  isVerified: Boolean,
  isActive: Boolean
}

Courses Collection

{
  _id: ObjectId,
  title: String,
  slug: String (unique, indexed),
  description: String,
  shortDescription: String,
  thumbnail: String (URL),
  previewVideo: String (URL),
  instructor: ObjectId (ref: Users),
  category: ObjectId (ref: Categories),
  subcategory: ObjectId (ref: Categories),
  tags: [String],
  level: String (enum: ['beginner', 'intermediate', 'advanced']),
  language: String,
  pricing: {
    type: String (enum: ['free', 'paid', 'subscription']),
    price: Number,
    currency: String,
    discount: {
      percentage: Number,
      validUntil: Date
    },
    stripePriceId: String
  },
  content: {
    totalDuration: Number (minutes),
    totalLessons: Number,
    totalQuizzes: Number,
    modules: [{
      _id: ObjectId,
      title: String,
      description: String,
      order: Number,
      lessons: [{
        _id: ObjectId,
        title: String,
        type: String (enum: ['article', 'quiz']),
        duration: Number,
        content: {
          articleContent: String (HTML content for articles),
          resources: [{ title: String, url: String, type: String }]
        },
        isPreview: Boolean,
        order: Number
      }]
    }]
  },
  requirements: [String],
  outcomes: [String],
  targetAudience: [String],
  stats: {
    enrollments: Number,
    completions: Number,
    averageRating: Number,
    totalReviews: Number
  },
  seo: {
    metaTitle: String,
    metaDescription: String,
    keywords: [String]
  },
  status: String (enum: ['draft', 'review', 'published', 'archived']),
  publishedAt: Date,
  createdAt: Date,
  updatedAt: Date
}

Enrollments Collection

{
  _id: ObjectId,
  user: ObjectId (ref: Users, indexed),
  course: ObjectId (ref: Courses, indexed),
  enrolledAt: Date,
  completedAt: Date,
  progress: {
    percentage: Number,
    completedLessons: [ObjectId],
    currentLesson: ObjectId,
    lastAccessedAt: Date,
    timeSpent: Number (minutes)
  },
  quizAttempts: [{
    quizId: ObjectId,
    attemptNumber: Number,
    score: Number,
    maxScore: Number,
    answers: [{ questionId: ObjectId, answer: Mixed, isCorrect: Boolean }],
    completedAt: Date,
    timeSpent: Number (seconds)
  }],
  certificate: {
    issued: Boolean,
    issuedAt: Date,
    certificateId: String,
    certificateUrl: String
  },
  payment: {
    orderId: ObjectId (ref: Orders),
    amount: Number,
    method: String
  },
  status: String (enum: ['active', 'completed', 'expired', 'refunded'])
}

Quizzes Collection

{
  _id: ObjectId,
  course: ObjectId (ref: Courses),
  module: ObjectId,
  lesson: ObjectId,
  title: String,
  description: String,
  type: String (enum: ['practice', 'graded', 'final']),
  settings: {
    timeLimit: Number (minutes, null for unlimited),
    passingScore: Number (percentage),
    maxAttempts: Number (null for unlimited),
    shuffleQuestions: Boolean,
    shuffleAnswers: Boolean,
    showCorrectAnswers: Boolean,
    showExplanations: Boolean
  },
  questions: [{
    _id: ObjectId,
    type: String (enum: ['multiple-choice', 'multiple-select', 'true-false',
                         'fill-blank', 'matching', 'ordering', 'short-answer']),
    question: String,
    questionMedia: { type: String, url: String },
    options: [{
      _id: ObjectId,
      text: String,
      isCorrect: Boolean,
      media: { type: String, url: String }
    }],
    correctAnswer: Mixed,
    explanation: String,
    points: Number,
    difficulty: String (enum: ['easy', 'medium', 'hard']),
    tags: [String],
    order: Number
  }],
  stats: {
    totalAttempts: Number,
    averageScore: Number,
    passRate: Number
  },
  isActive: Boolean,
  createdAt: Date,
  updatedAt: Date
}

Orders Collection

{
  _id: ObjectId,
  user: ObjectId (ref: Users, indexed),
  orderNumber: String (unique),
  items: [{
    type: String (enum: ['course', 'subscription', 'bundle']),
    itemId: ObjectId,
    title: String,
    price: Number,
    discount: Number
  }],
  pricing: {
    subtotal: Number,
    discount: Number,
    tax: Number,
    total: Number,
    currency: String
  },
  coupon: {
    code: String,
    discountAmount: Number
  },
  payment: {
    provider: String (enum: ['stripe']),
    stripePaymentIntentId: String,
    stripeChargeId: String,
    status: String (enum: ['pending', 'processing', 'succeeded', 'failed', 'refunded']),
    paidAt: Date
  },
  billing: {
    name: String,
    email: String,
    address: {
      line1: String,
      line2: String,
      city: String,
      state: String,
      postalCode: String,
      country: String
    }
  },
  invoice: {
    number: String,
    url: String
  },
  status: String (enum: ['pending', 'completed', 'cancelled', 'refunded']),
  createdAt: Date,
  updatedAt: Date
}

Categories Collection

{
  _id: ObjectId,
  name: String,
  slug: String (unique),
  description: String,
  icon: String,
  image: String (URL),
  parent: ObjectId (ref: Categories, null for top-level),
  order: Number,
  courseCount: Number,
  isActive: Boolean,
  seo: {
    metaTitle: String,
    metaDescription: String
  },
  createdAt: Date,
  updatedAt: Date
}

Reviews Collection

{
  _id: ObjectId,
  user: ObjectId (ref: Users),
  course: ObjectId (ref: Courses, indexed),
  rating: Number (1-5),
  title: String,
  content: String,
  helpful: {
    count: Number,
    users: [ObjectId]
  },
  instructorResponse: {
    content: String,
    respondedAt: Date
  },
  status: String (enum: ['pending', 'approved', 'rejected']),
  createdAt: Date,
  updatedAt: Date
}

Badges Collection

{
  _id: ObjectId,
  name: String,
  description: String,
  icon: String (URL),
  type: String (enum: ['achievement', 'milestone', 'skill', 'special']),
  criteria: {
    type: String (enum: ['courses_completed', 'quizzes_passed', 'streak_days',
                         'points_earned', 'reviews_written', 'custom']),
    threshold: Number,
    courseIds: [ObjectId],
    customLogic: String
  },
  points: Number,
  rarity: String (enum: ['common', 'uncommon', 'rare', 'epic', 'legendary']),
  isActive: Boolean,
  createdAt: Date
}

Notifications Collection

{
  _id: ObjectId,
  user: ObjectId (ref: Users, indexed),
  type: String (enum: ['course_update', 'quiz_result', 'badge_earned',
                       'certificate_ready', 'payment', 'system', 'promotional']),
  title: String,
  message: String,
  data: Mixed,
  link: String,
  isRead: Boolean,
  readAt: Date,
  createdAt: Date
}

5.2 Database Indexes

// Users
db.users.createIndex({ email: 1 }, { unique: true });
db.users.createIndex({ "subscription.status": 1, "subscription.currentPeriodEnd": 1 });
db.users.createIndex({ role: 1 });

// Courses
db.courses.createIndex({ slug: 1 }, { unique: true });
db.courses.createIndex({ status: 1, publishedAt: -1 });
db.courses.createIndex({ category: 1, status: 1 });
db.courses.createIndex({ instructor: 1 });
db.courses.createIndex({ "pricing.type": 1 });
db.courses.createIndex({ tags: 1 });
db.courses.createIndex({
  title: "text",
  description: "text",
  tags: "text"
}, { weights: { title: 10, tags: 5, description: 1 } });

// Enrollments
db.enrollments.createIndex({ user: 1, course: 1 }, { unique: true });
db.enrollments.createIndex({ user: 1, status: 1 });
db.enrollments.createIndex({ course: 1 });

// Orders
db.orders.createIndex({ user: 1, createdAt: -1 });
db.orders.createIndex({ orderNumber: 1 }, { unique: true });
db.orders.createIndex({ "payment.stripePaymentIntentId": 1 });

// Reviews
db.reviews.createIndex({ course: 1, status: 1, createdAt: -1 });
db.reviews.createIndex({ user: 1 });

// Notifications
db.notifications.createIndex({ user: 1, isRead: 1, createdAt: -1 });

5.3 Current Seed Data

The platform is pre-populated with seed data for development and testing. This section documents the current data structure.

5.3.1 Users

Field	Value
Email	instructor@example.com
Role	instructor
Name	Instructor User
Status	Verified, Active

5.3.2 Categories (14 Total)

📁 Digital Transformation (parent: null)
    ├── 🤖 AI & Machine Learning
    ├── ☁️ Cloud Computing
    └── 📊 Data Analytics

📁 Web Development (parent: null)
    ├── 🎨 Frontend Development
    ├── ⚙️ Backend Development
    └── 🔗 Full-Stack Development

📁 Business & Tech (parent: null)
    ├── 📋 Project Management
    └── 👔 Leadership

📁 DevOps & Infrastructure (parent: null)
    ├── 🔄 CI/CD & Automation
    └── 🔒 Security

5.3.3 Courses (13 Total)

#	Course Title	Category	Level	Lessons	Quizzes
1	Introduction to Artificial Intelligence	AI & ML	Beginner	19	4
2	Machine Learning Fundamentals	AI & ML	Intermediate	19	0
3	AWS Solutions Architect - Complete Guide	Cloud	Advanced	22	3
4	React 18 - The Complete Guide	Frontend	Beginner	26	0
5	Next.js 14 - Full-Stack Development	Full-Stack	Intermediate	22	0
6	Node.js & Express Bootcamp	Backend	Beginner	22	0
7	TypeScript Deep Dive	Frontend	Intermediate	22	0
8	Docker & Kubernetes Essentials	DevOps	Intermediate	22	0
9	CI/CD Pipeline Mastery	CI/CD	Intermediate	18	0
10	Agile Project Management with Scrum	Project Mgmt	Beginner	19	2
11	Tech Leadership Essentials	Leadership	Advanced	18	0
12	Data Analytics Masterclass	Data Analytics	Beginner	17	0
13	Cloud Security Fundamentals	Security	Beginner	20	0

5.3.4 Course Structure Details

Course 1: Introduction to Artificial Intelligence

Modules:

Introduction to AI (5 lessons)
- What is Artificial Intelligence? (article, preview)
- History of AI (article)
- Types of AI Systems (article)
- AI vs Machine Learning vs Deep Learning (article)
- Module 1 Quiz (quiz)
Machine Learning Basics (5 lessons)
- What is Machine Learning? (article)
- Supervised vs Unsupervised Learning (article)
- Common ML Algorithms (article)
- Hands-on: Your First ML Model (article)
- Module 2 Quiz (quiz)
Neural Networks Introduction (4 lessons)
- How Neural Networks Work (article)
- Perceptrons and Activation Functions (article)
- Building a Simple Neural Network (article)
- Module 3 Quiz (quiz)
AI Applications (5 lessons)
- AI in Healthcare (article)
- AI in Finance (article)
- AI in Transportation (article)
- Ethical Considerations in AI (article)
- Final Course Quiz (quiz)

Course 3: AWS Solutions Architect - Complete Guide

Modules:

AWS Fundamentals (4 lessons)
- AWS Global Infrastructure (article)
- IAM - Identity and Access Management (article)
- AWS CLI and SDK Setup (article)
- IAM Best Practices Quiz (quiz)
Compute Services (5 lessons)
- EC2 Instance Types and Pricing (article)
- EC2 Security Groups and Key Pairs (article)
- Auto Scaling and Load Balancers (article)
- Hands-on: Deploy a Web Application (article)
- Compute Quiz (quiz)
Storage Solutions (4 lessons)
- S3 Deep Dive (article)
- EBS Volume Types (article)
- S3 Lifecycle Policies (article)
- Hands-on: Static Website on S3 (article)
Database Services (4 lessons)
- RDS Overview and Setup (article)
- DynamoDB Fundamentals (article)
- ElastiCache for Performance (article)
- Hands-on: Multi-AZ Database Setup (article)
Serverless Architecture (5 lessons)
- AWS Lambda Deep Dive (article)
- API Gateway Setup (article)
- Step Functions for Workflows (article)
- Build a Serverless API (article)
- Final Exam (quiz)

Course 4: React 18 - The Complete Guide

Modules:

React Fundamentals (5 lessons)
React Hooks (6 lessons)
State Management (6 lessons)
React Router (5 lessons)
Building Production Apps (5 lessons)

Course 5: Next.js 14 - Full-Stack Development

Modules:

Next.js Fundamentals (5 lessons)
Server Components (5 lessons)
Server Actions (5 lessons)
Authentication (5 lessons)
Database Integration (4 lessons)

Course 6: Node.js & Express Bootcamp

Modules:

Node.js Fundamentals (5 lessons)
Express.js Framework (5 lessons)
MongoDB & Mongoose (5 lessons)
Authentication & Security (5 lessons)
Production Ready (4 lessons)

Course 10: Agile Project Management with Scrum

Modules:

Agile Fundamentals (5 lessons)
- The Agile Manifesto (article)
- Agile vs Waterfall (article)
- Agile Principles (article)
- Agile Mindset (article)
- Agile Quiz (quiz)
Scrum Framework (5 lessons)
Sprint Execution (5 lessons)
Advanced Scrum (5 lessons, includes quiz)

5.3.5 Quizzes (9 Total)

Quiz	Course	Type	Time Limit	Passing Score
Introduction to AI Quiz	Intro to AI	practice	5 min	70%
Machine Learning Basics Quiz	Intro to AI	practice	5 min	70%
Neural Networks Quiz	Intro to AI	practice	5 min	70%
AI Applications Quiz	Intro to AI	practice	5 min	70%
AWS Fundamentals Quiz	AWS Solutions	practice	5 min	70%
Compute Services Quiz	AWS Solutions	practice	5 min	70%
Serverless Architecture Quiz	AWS Solutions	practice	5 min	70%
Agile Fundamentals Quiz	Agile/Scrum	practice	5 min	70%
Advanced Scrum Quiz	Agile/Scrum	practice	5 min	70%

Quiz Settings (default for all):

Max Attempts: 3
Shuffle Questions: Yes
Shuffle Answers: Yes
Show Correct Answers: Yes
Show Explanations: Yes

Question Format: Each quiz contains multiple-choice questions with:

4 options per question
1 correct answer
Points awarded per correct answer

5.3.6 Quiz Random Selection System

The quiz system uses a question pool approach where each quiz can contain many questions, but only a subset is shown per attempt:

Default Questions Per Attempt: 10
Random Selection: Fisher-Yates shuffle algorithm
Unique Per Attempt: Each attempt gets a different random set
Configurable: API supports ?questionCount=N parameter

API Flow:

POST /quizzes/:id/start - Returns 10 random questions from pool
Client receives questionIds array to track selected questions
POST /quizzes/:id/submit - Client sends back questionIds with answers
Server grades only the questions that were presented

5.4 AI Content Generation (Premium Feature)

Premium users (Basic, Premium, Enterprise plans) with instructor role can use AI to generate content.

5.4.1 AI Endpoints

Endpoint	Description
`POST /ai/generate-article`	Generate article content for a lesson
`POST /ai/generate-and-save-article`	Generate and save article to lesson
`POST /ai/generate-questions`	Generate quiz questions from lesson content
`POST /ai/generate-course-outline`	Generate complete course structure
`POST /ai/improve-article`	Improve existing article with AI
`POST /ai/add-questions-to-pool`	Add AI questions to quiz pool

5.4.2 Access Requirements

Authentication: Required (JWT token)
Subscription: Basic, Premium, or Enterprise plan
Subscription Status: Active or Trialing
Role: Instructor, Admin, or Superadmin

5.4.3 AI Model

Provider: OpenAI
Model: GPT-4o-mini (cost-effective for content generation)
Features:
- Course outline generation
- Article content in HTML format
- Quiz question generation (multiple-choice, true-false, multiple-select)
- Content improvement/enhancement

6. Feature Specifications

6.1 User Management Features

Authentication

Email/Password Registration with email verification
Social Authentication (Google, GitHub, LinkedIn)
Magic Link Login for passwordless access
Two-Factor Authentication (2FA) with TOTP
Password Reset with secure token flow
Session Management with JWT + refresh tokens
Remember Me functionality

User Profile

Profile photo upload with cropping
Bio and professional information
Social links (LinkedIn, GitHub, Twitter)
Timezone and language preferences
Notification preferences
Privacy settings
Learning goals and interests

Account Management

Email change with verification
Password change
Account deletion (GDPR compliance)
Data export (GDPR compliance)
Connected accounts management
Login history and active sessions

6.2 Course Features

Course Discovery

Category Browsing with hierarchical navigation
Search with filters (level, duration, price, rating)
Recommendations based on user interests and history
Trending Courses based on enrollments
New Releases section
Featured Courses (admin curated)
Learning Paths (curated course sequences)

Course Detail Page

Course overview with instructor info
Curriculum preview with lesson titles
Free preview lessons
Student reviews and ratings
Course requirements and outcomes
Similar course recommendations
Social sharing buttons
Wishlist functionality

Course Player

Video Player with:
- Playback speed control (0.5x - 2x)
- Quality selection (auto, 360p, 720p, 1080p)
- Picture-in-Picture mode
- Keyboard shortcuts
- Closed captions/subtitles
- Bookmark timestamps
- Auto-resume from last position
Progress Sidebar with lesson list
Notes Taking synced with video timestamp
Resource Downloads (PDFs, code files)
Discussion Thread per lesson
Mark Complete button
Next/Previous navigation

Course Engagement

Course Q&A section
Discussion forums per course
Student reviews and ratings
Course announcements from instructor
Downloadable resources
Code playgrounds for exercises

6.3 Free vs Paid Course Structure

Feature	Free Courses	Paid Courses
Access Duration	Unlimited	Unlimited after purchase
Certificate	Basic completion	Professional certificate
Video Quality	Up to 720p	Up to 1080p
Downloadable Resources	Limited	Full access
Instructor Q&A	Community only	Direct instructor support
Quizzes	Basic quizzes	Full assessment suite
Projects	None	Hands-on projects
Priority Support	No	Yes

6.4 Instructor Features

Course creation wizard
Rich text editor for lesson content
Video upload with processing status
Quiz and assessment builder
Resource file management
Student analytics dashboard
Revenue and payout reports
Student Q&A management
Course announcement system
Bulk actions (lessons, students)

6.5 Admin Features

Dashboard with key metrics
User management (CRUD, roles, bans)
Course management and moderation
Category management
Coupon/discount management
Revenue reports and analytics
Platform settings
Email template management
Content moderation queue
System logs and audit trail

7. User Roles & Permissions

7.1 Role Hierarchy

SuperAdmin
    └── Admin
            └── Instructor
                    └── Student
                            └── Guest

7.2 Permission Matrix

Permission	Guest	Student	Instructor	Admin	SuperAdmin
Browse courses	✓	✓	✓	✓	✓
View free content	✓	✓	✓	✓	✓
Enroll in courses	✗	✓	✓	✓	✓
Purchase courses	✗	✓	✓	✓	✓
Take quizzes	✗	✓	✓	✓	✓
Write reviews	✗	✓	✓	✓	✓
Create courses	✗	✗	✓	✓	✓
Manage own courses	✗	✗	✓	✓	✓
View student data	✗	✗	Own students	✓	✓
Manage all courses	✗	✗	✗	✓	✓
Manage users	✗	✗	✗	✓	✓
Manage categories	✗	✗	✗	✓	✓
View revenue reports	✗	✗	Own	All	All
Manage coupons	✗	✗	✗	✓	✓
System settings	✗	✗	✗	✗	✓
Manage admins	✗	✗	✗	✗	✓

7.3 RBAC Implementation

// Role-based middleware example
const permissions = {
  student: ['courses.enroll', 'courses.view', 'quizzes.take', 'reviews.create'],
  instructor: ['courses.create', 'courses.update', 'quizzes.create', 'analytics.own'],
  admin: ['courses.manage', 'users.manage', 'categories.manage', 'coupons.manage'],
  superadmin: ['*']
};

// JWT payload includes role
{
  userId: "...",
  email: "...",
  role: "instructor",
  permissions: ["courses.create", "courses.update", ...],
  iat: ...,
  exp: ...
}

8. Payment & Monetization

8.1 Pricing Models

One-Time Purchase

Single course purchase
Course bundles at discounted rates
Lifetime access upon purchase

Subscription Plans

Plan	Price	Features
Free	$0/mo	Access to free courses only
Basic	$19/mo	Access to all courses, basic certificates
Premium	$49/mo	All Basic + priority support, downloadable resources
Enterprise	Custom	Team management, analytics, SSO, dedicated support

8.2 Stripe Integration

Payment Methods

Credit/Debit Cards
Apple Pay / Google Pay
Bank transfers (SEPA, ACH)
Regional payment methods

Stripe Features Used

Stripe Checkout for seamless payment flow
Stripe Elements for custom payment forms
Stripe Billing for subscriptions
Stripe Invoicing for enterprise customers
Stripe Connect for instructor payouts
Stripe Webhooks for payment events

Webhook Events Handled

const webhookEvents = [
  'checkout.session.completed',
  'payment_intent.succeeded',
  'payment_intent.payment_failed',
  'customer.subscription.created',
  'customer.subscription.updated',
  'customer.subscription.deleted',
  'invoice.payment_succeeded',
  'invoice.payment_failed',
  'customer.updated',
  'charge.refunded'
];

8.3 Coupon & Discount System

Coupon Type	Description
Percentage Off	10%, 25%, 50% discounts
Fixed Amount	$5, $10, $20 off
Free Trial Extension	Extra trial days
Bundle Discount	Discount on multiple courses
First Purchase	One-time new user discount
Referral	Discount for referrer and referee

Coupon Settings

Usage limits (total and per-user)
Valid date range
Minimum purchase amount
Applicable products/categories
Stackable with other offers

8.4 Instructor Revenue Share

Revenue Split:
├── Platform: 30%
└── Instructor: 70%

Payout Schedule:
├── Minimum threshold: $50
├── Payout frequency: Monthly
└── Payment method: Stripe Connect

8.5 Refund Policy

30-day money-back guarantee
Automatic refund if <10% course completed
Manual review for partial completions
No refunds for completed courses
Subscription pro-rata refunds available

9. Quiz & Assessment System

9.1 Question Types

Type	Description	Use Case
Multiple Choice	Single correct answer	Factual recall
Multiple Select	Multiple correct answers	Comprehensive understanding
True/False	Binary choice	Quick checks
Fill in the Blank	Text input completion	Terminology
Matching	Pair items from two lists	Associations
Ordering	Arrange items in sequence	Process understanding
Short Answer	Free text response	Deeper understanding
Code Challenge	Write/complete code	Programming courses

9.2 Quiz Settings

{
  // Time settings
  timeLimit: 30, // minutes, null for unlimited

  // Attempt settings
  maxAttempts: 3, // null for unlimited
  retakeDelay: 24, // hours between attempts

  // Scoring
  passingScore: 70, // percentage
  pointsPerQuestion: 10,
  negativeMarking: false,
  partialCredit: true,

  // Display settings
  shuffleQuestions: true,
  shuffleAnswers: true,
  showOneQuestionAtATime: false,
  allowBackNavigation: true,

  // Feedback settings
  showScoreImmediately: true,
  showCorrectAnswers: 'after_attempt', // 'never', 'after_passing', 'after_attempt'
  showExplanations: true,

  // Proctoring (future)
  requireCamera: false,
  preventTabSwitch: true
}

9.3 Quiz Flow

1. Quiz Introduction
   └── Instructions, time limit, attempts remaining

2. Question Display
   ├── Progress bar
   ├── Timer (if applicable)
   ├── Question navigation
   └── Flag for review

3. Answer Submission
   ├── Auto-save answers
   ├── Review flagged questions
   └── Final submission confirmation

4. Results Screen
   ├── Score breakdown
   ├── Time taken
   ├── Correct/incorrect answers
   ├── Explanations (if enabled)
   └── Retry option (if attempts remaining)

5. Progress Update
   ├── Update course progress
   ├── Award points
   ├── Check badge criteria
   └── Update leaderboard

9.4 Practice Mode vs Graded Mode

Feature	Practice Mode	Graded Mode
Time Limit	No	Yes (optional)
Attempts	Unlimited	Limited
Score Recording	No	Yes
Affects Progress	Partial	Full
Immediate Feedback	Yes	Configurable
Certificate Requirement	No	Yes

9.5 Assessment Analytics

Question difficulty analysis
Discrimination index
Time per question statistics
Common wrong answers
Pass/fail trends
Improvement over attempts

10. Gamification System

10.1 Points System

Activity	Points
Daily login	5
Complete lesson	10
Complete module	25
Complete course	100
Pass quiz (first attempt)	50
Pass quiz (retry)	25
Perfect quiz score	75
Write review	20
Helpful review (upvoted)	5
Refer a friend	100
Streak milestone (7 days)	50
Streak milestone (30 days)	200

10.2 Level System

Level Progression:
├── Level 1: Beginner (0 - 500 points)
├── Level 2: Apprentice (501 - 1,500 points)
├── Level 3: Learner (1,501 - 3,500 points)
├── Level 4: Achiever (3,501 - 7,000 points)
├── Level 5: Expert (7,001 - 15,000 points)
├── Level 6: Master (15,001 - 30,000 points)
└── Level 7: Legend (30,001+ points)

10.3 Badge Categories

Achievement Badges

First Steps: Complete first lesson
Quick Learner: Complete 5 courses
Dedicated: Complete 10 courses
Scholar: Complete 25 courses
Polymath: Complete courses in 5+ categories

Streak Badges

Consistent: 7-day streak
Committed: 30-day streak
Unstoppable: 100-day streak
Legendary: 365-day streak

Quiz Badges

Quiz Whiz: Pass 10 quizzes
Perfect Score: Get 100% on 5 quizzes
Speed Demon: Complete quiz in under 50% time limit
Persistence: Pass quiz after 3 attempts

Community Badges

Reviewer: Write 5 reviews
Helpful: Get 10 upvotes on reviews
Ambassador: Refer 5 friends

Special Badges

Early Adopter: Join in first month
Beta Tester: Report bugs
Founding Member: First 1000 users

10.4 Leaderboards

Weekly Leaderboard: Points earned this week
Monthly Leaderboard: Points earned this month
All-Time Leaderboard: Total points
Course Leaderboard: Per-course competition
Friends Leaderboard: Compare with connections

10.5 Streak System

{
  currentStreak: 15,
  longestStreak: 45,
  lastActivityDate: "2025-01-15",

  // Grace period
  gracePeriodHours: 24,

  // Streak protection (premium feature)
  freezesAvailable: 2,
  freezesUsed: 0,

  // Rewards
  streakMilestones: [7, 14, 30, 60, 100, 365],
  rewardsEarned: [7, 14, 30]
}

10.6 Certificates

Certificate Types

Course Completion Certificate
- Issued upon 100% completion
- Includes course name, date, instructor
- Unique verification code
- Shareable on LinkedIn
Specialization Certificate
- Complete a learning path
- Multiple courses in a track
- Enhanced credentials
Quiz Mastery Certificate
- Score 90%+ on final assessment
- Demonstrates proficiency

Certificate Features

PDF download
Unique verification URL
LinkedIn sharing integration
Blockchain verification (future)
Printable format
Company branding for enterprise

11. Analytics & Reporting

11.1 Student Dashboard Metrics

Learning Overview
├── Courses in progress: 3
├── Courses completed: 12
├── Total learning hours: 45.5
├── Current streak: 15 days
├── Points earned: 4,520
└── Badges earned: 8

This Week
├── Hours learned: 3.5
├── Lessons completed: 12
├── Quizzes passed: 3
└── Points earned: 180

Course Progress
├── Course A: 75% ████████░░
├── Course B: 45% █████░░░░░
└── Course C: 20% ██░░░░░░░░

11.2 Instructor Analytics

Metric	Description
Total Enrollments	Students enrolled in all courses
Active Students	Students active in last 30 days
Completion Rate	% of enrolled students who complete
Average Rating	Mean rating across all courses
Revenue	Total and per-course earnings
Student Engagement	Video watch time, quiz attempts
Top Performing Content	Highest-rated lessons
Drop-off Points	Where students stop

11.3 Admin Dashboard

Platform Overview
├── Total Users: 15,420
├── Active Subscriptions: 3,210
├── Monthly Revenue: $45,230
├── New Signups (30d): 890
└── Churn Rate: 5.2%

Content Stats
├── Total Courses: 245
├── Published: 198
├── In Review: 12
├── Total Lessons: 4,520
└── Total Video Hours: 850

Engagement
├── Daily Active Users: 2,340
├── Avg Session Duration: 25 min
├── Courses Started (30d): 1,234
├── Courses Completed (30d): 456
└── Avg Completion Rate: 37%

11.4 Report Types

Report	Audience	Frequency
Learner Progress	Students	Real-time
Course Performance	Instructors	Weekly
Revenue Summary	Instructors, Admin	Monthly
User Acquisition	Admin	Weekly
Content Engagement	Admin	Weekly
Quiz Analytics	Instructors	Per-quiz
Subscription Metrics	Admin	Monthly
Cohort Analysis	Admin	Monthly

11.5 Data Export

CSV export for all reports
PDF report generation
Integration with Google Analytics
Integration with business analytics tools (Power BI, Tableau)
Scheduled email reports

12. Security Implementation

12.1 Authentication Security

Authentication Stack
├── JWT Access Tokens (15 min expiry)
├── Refresh Tokens (7 days, rotating)
├── HttpOnly Cookies (production)
├── CSRF Protection
├── Rate Limiting (login attempts)
└── Password Requirements
    ├── Minimum 8 characters
    ├── Uppercase + lowercase
    ├── Numbers
    └── Special characters

12.2 Authorization Security

Role-Based Access Control (RBAC)
Resource-level permissions
JWT claim validation
API endpoint protection
Admin action audit logging

12.3 Data Security

Measure	Implementation
Encryption at Rest	MongoDB Atlas encryption
Encryption in Transit	TLS 1.3 everywhere
Password Hashing	bcrypt (cost factor 12)
Sensitive Data	AES-256 encryption
PII Handling	Tokenization, masking
Backup Encryption	AES-256

12.4 Application Security

Input Validation: Zod schemas on all inputs
Output Encoding: XSS prevention
SQL Injection: N/A (MongoDB), but NoSQL injection prevention
CSRF Protection: Token-based
Security Headers: Helmet.js implementation
Content Security Policy: Strict CSP
Dependency Scanning: npm audit, Snyk
Secret Management: Environment variables, Vault

12.5 Infrastructure Security

Security Layers
├── Cloudflare WAF
├── DDoS Protection
├── Rate Limiting (per IP, per user)
├── Geo-blocking (optional)
├── Bot Protection
├── SSL/TLS Termination
└── VPC Isolation (MongoDB Atlas)

12.6 Compliance

GDPR: Data export, deletion, consent
CCPA: California privacy compliance
PCI DSS: Stripe handles card data
SOC 2: Infrastructure providers

12.7 Security Monitoring

Real-time threat detection
Login anomaly detection
Failed login alerts
Unusual activity patterns
Security event logging
Incident response procedures

13. Third-Party Integrations

13.1 Payment & Finance

Service	Purpose
Stripe	Payment processing, subscriptions, payouts
Stripe Tax	Automatic tax calculation
Stripe Radar	Fraud detection

13.2 Communication

Service	Purpose
SendGrid	Transactional emails
Twilio	SMS notifications (optional)
Intercom/Crisp	Customer support chat
Pusher/Socket.io	Real-time notifications

13.3 Media & Content

Service	Purpose
Bunny CDN	Video streaming
Cloudinary	Image optimization
AWS S3	File storage
Vimeo OTT	Alternative video hosting

13.4 Analytics & Monitoring

Service	Purpose
Google Analytics 4	User analytics
Mixpanel	Product analytics
Sentry	Error tracking
LogRocket	Session replay
Hotjar	Heatmaps, recordings

13.5 Authentication

Service	Purpose
Google OAuth	Social login
GitHub OAuth	Developer social login
LinkedIn OAuth	Professional social login

13.6 Development & DevOps

Service	Purpose
GitHub	Code repository
GitHub Actions	CI/CD
Vercel	Frontend hosting
Railway/Render	Backend hosting
MongoDB Atlas	Database hosting
Redis Cloud	Caching

13.7 Future Integrations

OpenAI/Claude API: AI-powered tutoring
Zoom/Google Meet: Live sessions
Calendly: Scheduling
Zapier: Workflow automation
Slack: Team notifications

14. API Specifications

14.1 API Design Principles

RESTful API design
JSON request/response format
Consistent error handling
Pagination with cursor-based navigation
Rate limiting per endpoint
API versioning (URL-based)

14.2 API Endpoints Overview

Authentication
├── POST   /api/v1/auth/register
├── POST   /api/v1/auth/login
├── POST   /api/v1/auth/logout
├── POST   /api/v1/auth/refresh
├── POST   /api/v1/auth/forgot-password
├── POST   /api/v1/auth/reset-password
├── POST   /api/v1/auth/verify-email
├── GET    /api/v1/auth/me
└── POST   /api/v1/auth/oauth/:provider

Users
├── GET    /api/v1/users/profile
├── PATCH  /api/v1/users/profile
├── PATCH  /api/v1/users/password
├── DELETE /api/v1/users/account
├── GET    /api/v1/users/enrollments
├── GET    /api/v1/users/certificates
├── GET    /api/v1/users/progress
└── GET    /api/v1/users/notifications

Courses
├── GET    /api/v1/courses
├── GET    /api/v1/courses/:slug
├── GET    /api/v1/courses/:slug/curriculum
├── POST   /api/v1/courses/:slug/enroll
├── GET    /api/v1/courses/:slug/progress
├── PATCH  /api/v1/courses/:slug/lessons/:lessonId/complete
├── GET    /api/v1/courses/:slug/reviews
├── POST   /api/v1/courses/:slug/reviews
└── GET    /api/v1/courses/categories/:category

Quizzes
├── GET    /api/v1/quizzes/:quizId
├── POST   /api/v1/quizzes/:quizId/start
├── POST   /api/v1/quizzes/:quizId/submit
├── GET    /api/v1/quizzes/:quizId/results
└── GET    /api/v1/quizzes/:quizId/attempts

Payments
├── POST   /api/v1/payments/checkout
├── POST   /api/v1/payments/webhook
├── GET    /api/v1/payments/orders
├── GET    /api/v1/payments/orders/:orderId
├── POST   /api/v1/payments/subscription
├── DELETE /api/v1/payments/subscription
└── POST   /api/v1/payments/apply-coupon

Instructor (Protected)
├── GET    /api/v1/instructor/courses
├── POST   /api/v1/instructor/courses
├── PATCH  /api/v1/instructor/courses/:id
├── DELETE /api/v1/instructor/courses/:id
├── POST   /api/v1/instructor/courses/:id/lessons
├── POST   /api/v1/instructor/courses/:id/quizzes
├── GET    /api/v1/instructor/analytics
└── GET    /api/v1/instructor/revenue

Admin (Protected)
├── GET    /api/v1/admin/users
├── PATCH  /api/v1/admin/users/:id
├── GET    /api/v1/admin/courses
├── PATCH  /api/v1/admin/courses/:id/status
├── GET    /api/v1/admin/categories
├── POST   /api/v1/admin/categories
├── GET    /api/v1/admin/coupons
├── POST   /api/v1/admin/coupons
├── GET    /api/v1/admin/analytics
└── GET    /api/v1/admin/reports

14.3 Response Format

// Success Response
{
  "success": true,
  "data": { ... },
  "meta": {
    "pagination": {
      "page": 1,
      "limit": 20,
      "total": 100,
      "hasMore": true
    }
  }
}

// Error Response
{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid input data",
    "details": [
      { "field": "email", "message": "Invalid email format" }
    ]
  }
}

14.4 Rate Limits

Endpoint Category	Limit
Authentication	10 requests/minute
Public API	100 requests/minute
Authenticated API	300 requests/minute
Admin API	500 requests/minute
Webhooks	1000 requests/minute

15. Deployment Strategy

15.1 Environment Setup

Environments
├── Development (local)
│   ├── Local Node.js server
│   ├── Local MongoDB (Docker)
│   └── Local Redis (Docker)
├── Staging
│   ├── Vercel Preview
│   ├── Railway Staging
│   └── MongoDB Atlas (Dev cluster)
└── Production
    ├── Vercel Production
    ├── Railway Production
    └── MongoDB Atlas (Production cluster)

15.2 CI/CD Pipeline

# GitHub Actions Workflow
name: CI/CD Pipeline

on:
  push:
    branches: [main, develop]
  pull_request:
    branches: [main]

jobs:
  test:
    - Lint code
    - Run unit tests
    - Run integration tests
    - Check types

  build:
    - Build frontend
    - Build backend
    - Build Docker images

  deploy-staging:
    - Deploy to staging (on develop)
    - Run E2E tests

  deploy-production:
    - Deploy to production (on main)
    - Health checks
    - Notify team

15.3 Infrastructure Diagram

┌─────────────────────────────────────────────────────────────────┐
│                         USERS                                    │
└─────────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────────┐
│                     CLOUDFLARE                                   │
│              (CDN, DDoS Protection, WAF)                        │
└─────────────────────────────────────────────────────────────────┘
                              │
              ┌───────────────┼───────────────┐
              ▼               ▼               ▼
┌──────────────────┐ ┌──────────────────┐ ┌──────────────────┐
│     VERCEL       │ │    RAILWAY       │ │   BUNNY CDN      │
│   (Frontend)     │ │   (Backend)      │ │   (Video)        │
│   - Next.js      │ │   - Node.js      │ │   - HLS Stream   │
│   - Static       │ │   - Express      │ │                  │
└──────────────────┘ └──────────────────┘ └──────────────────┘
                              │
              ┌───────────────┼───────────────┐
              ▼               ▼               ▼
┌──────────────────┐ ┌──────────────────┐ ┌──────────────────┐
│  MONGODB ATLAS   │ │   REDIS CLOUD    │ │     AWS S3       │
│   (Database)     │ │   (Cache)        │ │   (Storage)      │
└──────────────────┘ └──────────────────┘ └──────────────────┘

15.4 Scaling Strategy

Component	Scaling Approach
Frontend	Vercel automatic scaling, edge caching
Backend	Railway auto-scaling, horizontal pods
Database	MongoDB Atlas auto-scaling, sharding
Cache	Redis Cluster mode
Video	Bunny CDN edge locations
Storage	S3 with CloudFront

15.5 Monitoring & Alerting

Monitoring Stack
├── Application Monitoring
│   ├── Sentry (errors)
│   ├── LogRocket (sessions)
│   └── Custom logging (Winston)
├── Infrastructure Monitoring
│   ├── Railway metrics
│   ├── MongoDB Atlas monitoring
│   └── Vercel analytics
├── Alerting
│   ├── PagerDuty / OpsGenie
│   ├── Slack notifications
│   └── Email alerts
└── Uptime Monitoring
    └── Better Uptime / Pingdom

16. Development Phases

Phase 1: Foundation (MVP)

Core Features:

User registration/login (email + Google OAuth)
Course listing and detail pages
Free course access
Basic video player
Course progress tracking
Simple quiz system (multiple choice)
User profile
Mobile-responsive design

Technical:

Next.js frontend setup
Express backend setup
MongoDB Atlas configuration
Basic API endpoints
JWT authentication
Basic CI/CD pipeline

Phase 2: Monetization

Features:

Stripe payment integration
Course purchasing flow
Order history
Basic subscription system
Coupon/discount codes
Invoice generation
Instructor dashboard (basic)

Technical:

Stripe Checkout integration
Webhook handling
Subscription billing
Email notifications (SendGrid)

Phase 3: Enhanced Learning

Features:

Advanced quiz types (all types)
Timed assessments
Certificate generation
Course reviews and ratings
Course search with filters
Learning paths
Bookmarks and notes

Technical:

Advanced quiz engine
PDF certificate generation
Elasticsearch integration (optional)
Redis caching

Phase 4: Gamification & Engagement

Features:

Points system
Badges and achievements
Leaderboards
Streak tracking
Progress milestones
Social sharing
Email drip campaigns

Technical:

Gamification service
Background job processing
Push notifications
Analytics events

Phase 5: Advanced Features

Features:

Full instructor tools
Course creation wizard
Video upload processing
Advanced analytics
Admin dashboard
Content moderation
Multi-language support

Technical:

Video transcoding pipeline
Admin panel (React Admin)
Advanced reporting
i18n implementation

Phase 6: Scale & Optimize

Features:

Live sessions (Zoom integration)
Discussion forums
AI-powered recommendations
Mobile app (React Native)
Enterprise features
API access for partners

Technical:

Microservices migration (as needed)
Performance optimization
Advanced caching
CDN optimization
Load testing

Appendix A: Environment Variables

# Application
NODE_ENV=production
PORT=3001
FRONTEND_URL=https://yourplatform.com
API_URL=https://api.yourplatform.com

# Database
MONGODB_URI=mongodb+srv://...
REDIS_URL=redis://...

# Authentication
JWT_SECRET=your-jwt-secret
JWT_REFRESH_SECRET=your-refresh-secret
JWT_EXPIRY=15m
JWT_REFRESH_EXPIRY=7d

# OAuth
GOOGLE_CLIENT_ID=...
GOOGLE_CLIENT_SECRET=...
GITHUB_CLIENT_ID=...
GITHUB_CLIENT_SECRET=...

# Stripe
STRIPE_SECRET_KEY=sk_live_...
STRIPE_PUBLISHABLE_KEY=pk_live_...
STRIPE_WEBHOOK_SECRET=whsec_...

# Email
SENDGRID_API_KEY=SG...
EMAIL_FROM=noreply@yourplatform.com

# Storage
AWS_ACCESS_KEY_ID=...
AWS_SECRET_ACCESS_KEY=...
AWS_S3_BUCKET=...
AWS_REGION=us-east-1

# Video
BUNNY_API_KEY=...
BUNNY_LIBRARY_ID=...
BUNNY_CDN_URL=...

# Monitoring
SENTRY_DSN=https://...

Appendix B: Recommended Packages

Frontend (package.json)

{
  "dependencies": {
    "next": "^14.0.0",
    "react": "^18.2.0",
    "react-dom": "^18.2.0",
    "@tanstack/react-query": "^5.0.0",
    "zustand": "^4.4.0",
    "zod": "^3.22.0",
    "react-hook-form": "^7.48.0",
    "@hookform/resolvers": "^3.3.0",
    "tailwindcss": "^3.3.0",
    "@radix-ui/react-*": "latest",
    "lucide-react": "^0.294.0",
    "framer-motion": "^10.16.0",
    "video.js": "^8.6.0",
    "@stripe/stripe-js": "^2.2.0",
    "@stripe/react-stripe-js": "^2.4.0",
    "next-auth": "^4.24.0",
    "axios": "^1.6.0",
    "date-fns": "^2.30.0",
    "react-markdown": "^9.0.0"
  }
}

Backend (package.json)

{
  "dependencies": {
    "express": "^4.18.0",
    "mongoose": "^8.0.0",
    "stripe": "^14.0.0",
    "jsonwebtoken": "^9.0.0",
    "bcryptjs": "^2.4.3",
    "ioredis": "^5.3.0",
    "bullmq": "^4.14.0",
    "zod": "^3.22.0",
    "helmet": "^7.1.0",
    "cors": "^2.8.5",
    "express-rate-limit": "^7.1.0",
    "winston": "^3.11.0",
    "nodemailer": "^6.9.0",
    "@sendgrid/mail": "^7.7.0",
    "multer": "^1.4.5",
    "sharp": "^0.33.0",
    "uuid": "^9.0.0",
    "passport": "^0.7.0",
    "passport-google-oauth20": "^2.0.0",
    "socket.io": "^4.7.0"
  }
}

Appendix C: Folder Structure

project/
├── apps/
│   ├── web/                    # Next.js frontend
│   │   ├── app/                # App router pages
│   │   ├── components/         # React components
│   │   ├── hooks/              # Custom hooks
│   │   ├── lib/                # Utilities
│   │   ├── stores/             # Zustand stores
│   │   └── styles/             # Global styles
│   │
│   └── api/                    # Express backend
│       ├── src/
│       │   ├── config/         # Configuration
│       │   ├── controllers/    # Route handlers
│       │   ├── middleware/     # Express middleware
│       │   ├── models/         # Mongoose models
│       │   ├── routes/         # Route definitions
│       │   ├── services/       # Business logic
│       │   ├── utils/          # Helpers
│       │   ├── validators/     # Zod schemas
│       │   └── app.ts          # Express app
│       └── tests/              # Test files
│
├── packages/
│   ├── shared/                 # Shared types/utils
│   └── ui/                     # Shared UI components
│
├── docker/                     # Docker configs
├── scripts/                    # Build/deploy scripts
├── docs/                       # Documentation
└── .github/                    # GitHub Actions

Document Information

Item	Details
Version	1.0.0
Created	December 2025
Last Updated	December 2025
Author	Platform Development Team

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PLATFORM_DOCUMENTATION.md

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Digital Transformation Education Platform

Comprehensive Technical & Feature Documentation

Table of Contents

1. Executive Summary

2. Platform Overview

2.1 Vision Statement

2.2 Target Audience

2.3 Core Value Propositions

3. Technical Architecture

3.1 Architecture Overview

3.2 Content Hierarchy

3.3 Key Architecture Principles

4. Technology Stack

4.1 Frontend Stack

4.2 Backend Stack

4.3 DevOps & Infrastructure

4.4 Development Tools

5. Database Design

5.1 MongoDB Collections Schema

Users Collection

Courses Collection

Enrollments Collection

Quizzes Collection

Orders Collection

Categories Collection

Reviews Collection

Badges Collection

Notifications Collection

5.2 Database Indexes

5.3 Current Seed Data

5.3.1 Users

5.3.2 Categories (14 Total)

5.3.3 Courses (13 Total)

5.3.4 Course Structure Details

Course 1: Introduction to Artificial Intelligence

Course 3: AWS Solutions Architect - Complete Guide

Course 4: React 18 - The Complete Guide

Course 5: Next.js 14 - Full-Stack Development

Course 6: Node.js & Express Bootcamp

Course 10: Agile Project Management with Scrum

5.3.5 Quizzes (9 Total)

5.3.6 Quiz Random Selection System

5.4 AI Content Generation (Premium Feature)

5.4.1 AI Endpoints

5.4.2 Access Requirements

5.4.3 AI Model

6. Feature Specifications

6.1 User Management Features

Authentication

User Profile

Account Management

6.2 Course Features

Course Discovery

Course Detail Page

Course Player

Course Engagement

6.3 Free vs Paid Course Structure

6.4 Instructor Features

6.5 Admin Features

7. User Roles & Permissions

7.1 Role Hierarchy

7.2 Permission Matrix

7.3 RBAC Implementation

8. Payment & Monetization

8.1 Pricing Models

One-Time Purchase

Subscription Plans

8.2 Stripe Integration

Payment Methods

Stripe Features Used

Webhook Events Handled

8.3 Coupon & Discount System

Coupon Settings

8.4 Instructor Revenue Share