Code Campus is a comprehensive Learning Management System (LMS) built with React, TypeScript, Node.js, and MongoDB, designed to revolutionize online education through modern web technologies. The platform provides a complete ecosystem for educational content delivery, featuring course management, secure payment processing via SSL Commerz, video content delivery with advanced playback controls, and real-time collaboration tools.
The platform features SSL Commerz payment gateway integration supporting multiple payment methods (bKash, Nagad, credit/debit cards) for secure course purchases, comprehensive admin dashboard for managing courses, users, payments, and analytics, video upload and streaming with advanced playback controls and progress tracking, and live group chat system enabling real-time communication between course members using Socket.io.
Code Campus empowers administrators with complete control over the platform including course creation and editing, user management with role-based access control, payment transaction monitoring, content moderation, enrollment tracking, and comprehensive analytics dashboard. Students can purchase courses securely, access video content with adaptive streaming, track their learning progress, participate in live group discussions, and download course materials.
Developed by Mhr Rony, Code Campus demonstrates expertise in building scalable educational platforms with real-time features, secure payment integration, and advanced media handling. The platform combines modern TypeScript development with robust backend architecture to deliver a seamless learning experience for both students and administrators.
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Challenge
The primary challenge was building a comprehensive Learning\n Management System that combines secure payment processing,\n video content delivery, real-time communication, and complete\n administrative control while maintaining optimal performance\n and user experience across all features.
Payment Integration & Course Purchase
Integrating SSL Commerz payment gateway for secure course purchases supporting multiple payment methods including bKash, Nagad,\n credit/debit cards, and internet banking. Implementing secure\n payment flow with server-to-server validation, transaction\n monitoring with real-time status updates, automatic enrollment\n upon successful payment, and comprehensive payment history\n tracking for both students and administrators.
Admin Management & Control
Building comprehensive admin dashboard with complete platform\n control including course creation, editing, and deletion,\n user management with role-based access control (Admin,\n Instructor, Student), payment transaction monitoring and\n reporting, content moderation and approval workflows,\n enrollment tracking and management, analytics dashboard with\n revenue, user growth, and course performance metrics, and\n real-time notifications for new enrollments and transactions.
Video Upload & Playback System
Implementing video upload functionality with Cloudinary\n integration for optimized storage and delivery, building\n advanced video player with playback controls including\n play/pause, seek, volume, quality selection, and fullscreen,\n creating video progress tracking system saving watch progress\n for resume functionality, implementing adaptive streaming for\n different network conditions, adding support for multiple video\n formats and resolutions, and ensuring secure video delivery\n with access control preventing unauthorized viewing.
Live Group Chat & Real-time Communication
Building real-time group chat system using Socket.io for\n instant messaging between course members, implementing course-specific\n chat rooms with access restricted to enrolled students,\n creating message persistence with MongoDB for chat history,\n developing typing indicators and online status features,\n implementing message notifications for new messages, adding\n file sharing capabilities within chat, and building moderation\n tools for instructors to manage discussions.
System Design
Frontend Architecture
Built with React 18 and TypeScript utilizing Vite for fast\n development and optimized production builds, Tailwind CSS for\n responsive utility-first styling, React Router v6 for\n client-side routing, Context API for state management,\n Socket.io client for real-time features, Video.js for advanced\n video playback, React Hook Form with validation for form\n handling, and Axios for API communication with interceptors.
Backend Architecture
RESTful API built with Node.js and Express.js featuring JWT\n authentication with httpOnly cookies and refresh tokens,\n role-based access control middleware (Admin, Instructor,\n Student), MongoDB with Mongoose ODM for flexible data modeling,\n Socket.io server for real-time chat and notifications, Multer\n for video and file uploads, bcryptjs for password hashing, and\n comprehensive error handling with custom error classes.
Database Schema
User collection with authentication, roles, and profile data,\n Course collection with curriculum, pricing, and instructor\n information, Enrollment collection tracking student course\n access and progress, Payment collection with transaction\n details and SSL Commerz data, Video collection with metadata,\n URLs, and progress tracking, ChatMessage collection for group\n chat history, ChatRoom collection for course-specific\n conversations, and Notification collection for admin alerts.
Payment Processing Flow
SSL Commerz integration with sandbox and production environment\n support, course purchase initiation creating payment session,\n redirect to SSL Commerz payment gateway, support for multiple\n payment methods (mobile banking, cards, internet banking),\n secure callback handling for success, failure, and\n cancellation, automatic course enrollment upon successful\n payment, transaction logging with complete audit trail, payment\n verification with server-to-server validation, and email\n notifications for purchase confirmations.
Video Delivery System
Cloudinary integration for video upload and storage with\n automatic transcoding to multiple formats, adaptive bitrate\n streaming for optimal playback quality, signed URLs for secure\n video access preventing unauthorized viewing, Video.js player\n with custom controls and branding, progress tracking saving\n current playback position, resume functionality allowing\n students to continue from last position, thumbnail generation\n for video previews, and CDN delivery for fast global access.
Real-time Chat System
Socket.io implementation with WebSocket protocol for low-latency\n communication, course-specific chat rooms with automatic joining\n upon enrollment, message broadcasting to all room participants,\n typing indicators showing when users are composing messages,\n online/offline status tracking, message persistence with\n MongoDB for chat history, file attachment support with\n Cloudinary storage, and moderation capabilities for instructors.
Results
Successfully delivered a production-ready Learning Management\n System with comprehensive features for modern online education,\n secure payment processing, and real-time collaboration.
Student Learning Experience
Browse and search courses with advanced filtering by category,\n price, and instructor. Secure course purchase via SSL Commerz\n with multiple payment methods (bKash, Nagad, cards). Access\n enrolled courses with video lessons and downloadable materials.\n Advanced video playback with resume functionality and progress\n tracking. Real-time group chat with course members for\n discussions and collaboration. Track learning progress with\n detailed analytics. Download course completion certificates.\n Manage user profile and view payment history.
Admin Management Dashboard
Comprehensive dashboard with revenue statistics, user growth\n metrics, and course performance analytics. Complete course\n management with create, edit, delete, and publish controls.\n Video upload with Cloudinary integration and thumbnail\n generation. User management with role assignment (Admin,\n Instructor, Student) and account status control. Payment\n transaction monitoring with detailed transaction history and\n revenue reports. Enrollment tracking showing student progress\n across all courses. Content moderation tools for managing chat\n and course content. Real-time notifications for new\n enrollments, payments, and student activity.
Payment & Transaction System
SSL Commerz integration supporting bKash, Nagad, credit/debit\n cards, and internet banking. Secure payment flow with\n server-to-server validation ensuring transaction integrity.\n Automatic course enrollment upon successful payment completion.\n Comprehensive transaction logging with complete audit trail.\n Payment failure handling with retry mechanisms. Email\n notifications for purchase confirmations and receipts. Admin\n dashboard for monitoring all transactions and revenue.\n Refund management system for handling payment disputes.
Video Content Delivery
Cloudinary video storage with automatic transcoding to multiple\n formats and resolutions. Advanced video player built with\n Video.js featuring play/pause, seek, volume, quality selection,\n playback speed, and fullscreen controls. Adaptive bitrate\n streaming automatically adjusting quality based on network\n conditions. Progress tracking saving current playback position\n in database. Resume functionality allowing students to continue\n from last watched position. Secure signed URLs preventing\n unauthorized video access. Thumbnail generation for video\n previews. CDN delivery via Cloudflare for fast global access.
Live Group Chat & Collaboration
Real-time group chat using Socket.io with instant message\n delivery. Course-specific chat rooms automatically created for\n each course. Access control ensuring only enrolled students can\n join chat. Message persistence with MongoDB for complete chat\n history. Typing indicators showing when users are composing\n messages. Online/offline status tracking for all participants.\n File sharing within chat with Cloudinary storage. Instructor\n moderation tools for managing discussions. Message notifications\n for new chat activity. Search functionality for finding past\n messages.
Performance & Scalability
Average API response time under 200ms through database indexing\n and query optimization. Real-time chat with Socket.io handling\n thousands of concurrent connections. Video streaming with\n adaptive bitrate ensuring smooth playback. TypeScript providing\n type safety and reducing runtime errors. Code splitting and\n lazy loading for improved initial page load. Responsive design\n working seamlessly on desktop, tablet, and mobile. Database\n connection pooling for efficient resource usage. CDN delivery\n for static assets and video content.
Security & Compliance
JWT authentication with httpOnly cookies preventing XSS attacks.\n Role-based access control ensuring proper authorization.\n bcrypt password hashing with salt rounds for secure storage.\n SSL Commerz PCI DSS compliance for payment security. Input\n validation and sanitization preventing injection attacks. CORS\n configuration for secure cross-origin requests. Rate limiting\n on API endpoints preventing abuse. Signed video URLs preventing\n unauthorized content access. Secure WebSocket connections with\n authentication. Comprehensive error logging without exposing\n sensitive data.
