ClassNotes ~ MSc Chemistry

📖 Overview

ClassNotes is a modern Single Page Application (SPA) designed to solve the chaos of sharing study materials. Unlike static file lists, it provides a rich user experience with real-time search, category filtering, and a custom PDF viewer.

It runs on a serverless architecture, utilizing Firebase for the database and Google Apps Script(GAS) as a backend API to handle file uploads, bug reports, and email notifications without a dedicated server.

Checkout Live Site to know more.

✨ Key Features

🎓 For Students

• Smart Search: Instantly filter notes by title, professor, or subject (e.g., "Organic", "Spectroscopy").
• Built-in PDF Viewer: Read notes directly without downloading them first.
• Seasonal Themes: The UI reacts to holidays (Diwali, Christmas, Holi) and seasons (Snow in winter, Rain in monsoon).
• Deep Linking: Share a specific note with a direct URL (e.g., /?pdf=123).
• Dark Mode: Fully supported system-wide dark theme.

🛡️ For Admins

• Maintenance Terminal: A hidden, CLI-style interface for system diagnostics (Easter Egg 🥚).
• Automated Moderation: Google Apps Script filters and emails admin upon new uploads/reports.
• Analytics: Anonymous tracking of search gaps (what students look for but don't find).

🔐 Security Model

ClassNotes is not an open upload platform.

• Anyone can view and read notes
• Only verified users can upload PDFs
• Upload permissions are enforced via Firestore Security Rules
• Client-side code is never trusted for security decisions

Even if the frontend is modified, unauthorized uploads are blocked at the database level.

🛠️ Tech Stack

Component	Technology	Description
Frontend	HTML5, CSS3, JS	Vanilla JS (ES6+), CSS Variables, Flexbox/Grid
Database	Firebase Firestore	Stores PDF metadata, comments, and analytics
Auth	Firebase Auth	Anonymous authentication for session tracking
Backend	Google Apps Script	Handles uploads (doPost), emails, and config
Storage	Google Drive	Hosts the actual PDF files

🚀 Installation & Setup

1. Clone the Repository

   git clone https://github.com/MrAlokTech/classnotes.git
   cd classnotes

2. Configure Firebase

   1. Go to Firebase Console and create a project.

   2. Enable Firestore Database and Authentication (Anonymous Sign-in).

   3. Copy your web app configuration.

   4. Update index.html (bottom script section):

      constfirebaseConfig={apiKey: "YOUR_API_KEY",authDomain: "YOUR_PROJECT.firebaseapp.com",projectId: "YOUR_PROJECT_ID",// ... other keys};

3. Setup Google Apps Script (Backend)

   1. Create a new Google Sheet.

   2. Go to Extensions > Apps Script.

   3. Paste the backend code (handles doPost for uploads/reports).

   4. Deploy as a Web App (Access: Anyone).

   5. Update script.js and upload.js:

      constGAS_URL="https://script.google.com/macros/s/YOUR_DEPLOYMENT_ID/exec";

4. Run Locally

   You can use any static server. For example, with Python:

   python -m http.server 8000

   Visit http://localhost:8000 in your browser.

📂 Project Structure

├── index.html # Main application (Search, Grid, Viewer)
├── style.css # Global styles, variables, and animations
├── script.js # Core logic, Firebase init, UI events
├── upload/
│ ├── index.html # Upload form interface
│ ├── style.css # upload Standalone styling
│ └── upload.js # File encoding & GAS submission logic
├── legal/
│ ├── privacy-policy.html
│ ├── takedown-policy.html
│ ├── terms-of-use.html
│ ├── legal.css
│ └── legal.js
└── README.md # This file

🥚 Easter Eggs

• The Terminal: Try finding the hidden "Maintenance Mode" screen.
• Prank Mode: Don't click the logo too many times... you've been warned.

🧠 Open Source Scope

This repository contains the client-side source code only.

It does not include:

• PDF notes or educational content
• Firebase data or credentials
• Admin or verification access
• Private Google Apps Script source code

Educational content on the live site is not open source unless explicitly stated.

🔐 Security

Security is taken seriously in this project.

If you discover a security issue (for example, upload bypass, Firestore rule issues, or backend misuse), do not open a public GitHub issue.

Please report security vulnerabilities responsibly. See SECURITY.md for full details.

🤝 Contributing

Contributions are welcome, but this project follows a serverless Firebase architecture with strict security boundaries.

Please read CONTRIBUTING.md before submitting a pull request. Pull requests that weaken security or bypass verification rules may be rejected.

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

Made with ❤️ by Alok Das