Colorado Gamma Study Bank

An invite-only academic resource platform for Sigma Phi Epsilon's Colorado Gamma chapter.

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Overview

Colorado Gamma Study Bank gives chapter members one secure place to upload, discover, preview, save, and manage academic resources. The platform is organized around courses and professors, with invitation-based registration and role-specific moderation tools.

Features

• Search and filter resources by course, professor, type, topic, and relevance
• Upload PDFs and generate first-page preview images automatically
• Store private files and previews in Cloudflare R2
• Save useful resources and mark submissions as helpful
• Track personal submissions and moderation status
• Invite-only registration with secure cookie-based sessions
• Moderator review queue with approval and revision workflows
• Administrative tools for users, invitations, roles, and audit history
• Responsive interface for desktop and mobile use

Screenshots

Resource library	Resource preview
Resource submission	Moderation workflow

Architecture

React + Vite client
        |
        | HTTPS / authenticated API requests
        v
Express + TypeScript API
        |
        +---- MongoDB Atlas
        |       users, sessions, courses, resources, invitations
        |
        +---- Cloudflare R2
                private PDFs and generated preview images

The frontend is deployed on Vercel, the API is hosted on Render, MongoDB Atlas stores application data, and Cloudflare R2 stores uploaded documents.

Technology

Area	Technologies
Frontend	React, TypeScript, Vite, React Router, TanStack Query
Forms and validation	React Hook Form, Zod
Backend	Node.js, Express, TypeScript
Authentication	Signed HTTP-only cookies, persisted sessions, role-based authorization
Database	MongoDB Atlas, Mongoose
File storage	Cloudflare R2
Deployment	Vercel, Render

Access model

The platform is intentionally invite-only. Members can browse and submit resources, moderators can review submissions, and administrators can manage accounts, invitations, and chapter-wide settings.

Uploaded PDFs remain private and are served only through authenticated API routes.

Author

Built by Simon Balanoff.