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# Internal Management Platform
[GitHub](https://github.com/Webmaster-ESN-UAM-Madrid/web-esn) | [Live Demo](https://management.esnuam.org)
**Date:** March 2026
**Technologies:** Node.js, TypeScript, MongoDB, Next.js, React, Tailwind CSS, Framer Motion, Better Auth
---
## Project Overview
The Internal Management Platform is a secure, single-page application built for ESN UAM Madrid to handle three critical organizational processes that previously ran on scattered Google Forms and manual spreadsheets: semesterly committee restructuring, anonymous performance evaluations, and administrative oversight of membership roles. It consolidates these workflows into a unified tabbed dashboard where users see only the tools relevant to their current role and the active organizational phase.
The platform operates on a semester-scoped model. A global configuration singleton controls which processes are open (restructuring, evaluations), which semester is active, and who holds administrative privileges. Users authenticate via Google OAuth restricted to the `@esnuam.org` domain, and the system automatically provisions their profiles from session data on first login. Authorization is tiered: general members participate in open processes, the HR team access administrative panels, and the core responsible (vicepresident) holds override permissions including deanonymization of evaluation results.
Every interface decision prioritizes reducing friction for non-technical users. The restructuring flow uses drag-and-drop ranking with mandatory motivation notes. The evaluation presents targets grouped by shared committee membership, with real-time autosave and progress tracking. Results views support deanonymization for leadership while preserving anonymity for general members, including interactive bar charts for junta role fulfillment votes.
## Technical Stack
### Backend
- **Runtime**: Node.js with TypeScript
- **Framework**: Next.js 15 App Router with API route handlers
- **Database**: MongoDB with Mongoose ODM
- **Authentication**: Better Auth with Google OAuth 2.0, domain-restricted to `@esnuam.org`
- **Authorization**: Role-based access control combining hardcoded MD5 email hashes for core admins, committee-based HR team checks, and dynamic admin elevation via the global config
- **Session Management**: Server-side session validation through `auth.api.getSession` with Next.js headers
### Frontend
- **Framework**: Next.js App Router with client-side dashboard components
- **Styling**: Tailwind CSS with CSS custom properties (design tokens) and responsive breakpoints
- **Animations**: Framer Motion for tab transitions, layout animations, and drag-and-drop ghost positioning
- **Charts**: Recharts statistics visualization in evaluation results
- **Icons**: Material Icons via Google Fonts
### DevOps
- **Containerization**: Docker multi-stage build with standalone Next.js output
- **CI/CD**: GitHub Actions with Buildx, cosign image signing, and ghcr.io registry
- **Cache Strategy**: GitHub Actions cache for Docker layers
## Architecture Highlights
### Semester-Scoped Global Configuration
The platform uses a single `GlobalConfig` document with `_id: "main"` that stores three control flags: `reestructuringOpen` (boolean), `semesterId` (string, e.g. "sept-2025"), and `evaluationId` (string or null, pointing to the active semester for evaluations). This design allows the organization to run restructuring and evaluations on different semester baselines or close both processes entirely without code changes.
When the semester changes, the config endpoint triggers automatic membership rollover. GDTs (Work Groups, or _Grupos de Trabajo_) and directive board members persist across semesters. Additionally, Board role associations propagate automatically: if a user holds "President", they inherit membership in all committees tagged with that board role. This eliminates the manual work of reassigning leadership-linked committees every semester.
### Committee Restructuring with Drag-and-Drop Ranking
Members select and rank their preferred committees for the upcoming semester through an interface that combines a selection grid with a reorderable priority list. Each selection requires a motivation note, preventing empty preferences. The drag-and-drop implementation uses raw pointer events rather than a library, giving precise control over ghost positioning and mobile touch handling.
The ghost element follows the pointer in real time while Framer Motion handles the layout animation of remaining items sliding into their new positions. Target index calculation uses midpoint comparisons against the remaining items, producing intuitive reordering without full library overhead.
Preferences are saved with debounced autosave (1 second delay) and display persistent "Saving... / Saved" status indicators. The system enforces a compound unique index on `(userId, semesterId)` to prevent duplicate submissions.
### Anonymous Evaluation Engine
The evaluation system computes targets dynamically based on shared committee membership for the active evaluation semester. When a user loads the evaluation tab, the backend returns groups of evaluable peers organized by committee, plus a "general" bucket for optional comments on anyone active that semester. Directive board members appear as a special group with an additional question about whether the user thinks that they (individually) fulfilled their roles.
Evaluations autosave per field with 800ms debounce, showing granular save states per card. The UI prevents self-evaluation at the API level and tracks completion progress with a visual bar. Optional general comments can be added through a searchable modal that filters already-evaluated users.
### Deanonymized Results with Recharts Visualization
Results access is strictly hierarchical. The core admin (vicepresidents) can deanonymize evaluators by clicking reveal icons, seeing names and avatars. General HR team members see only anonymized avatars for others' feedback, while their own submissions are tagged "You (Author)".
For board role evaluations, the platform renders interactive bar charts showing fulfillment vote distribution using Recharts.
The results sidebar uses Framer Motion's `layoutId` for animated selection indicators that glide between users, with directional content transitions (left/right based on selection order) and mobile-responsive modal selectors.
### Role-Based Tab Gating with Framer Motion
The dashboard dynamically computes visible tabs based on the intersection of user permissions and global config state. Tabs appear only when relevant: restructuring only if open and the user is not hidden; evaluations only if an `evaluationId` is set and the user belongs to that semester; admin panels only for HR or the core admin.
Tab switching uses Framer Motion variants with directional awareness: horizontal slide for desktop, vertical slide for mobile, calculated from tab index ordering. The active tab indicator is a shared `layoutId` element that morphs between buttons using spring physics.
### Admin Panel with Inline Membership Editing
The administrative interface supports full CRUD for users and committees within the same semester context. User editing presents committee assignments as a dynamic list of selects, with special handling for board roles (dropdown of nine predefined positions). Committee creation auto-generates URL-friendly IDs by slugifying the title and appending a short random hash.
The restructuring results view for admins shows all submitted preferences organized by committee, with inline approve/remove toggles that directly mutate the user's `committees` array for the active semester. A greedy balanced column algorithm distributes accepted members across four columns for a clean summary export, and a "Download as Image" feature uses `html-to-image` with 5x pixel ratio for high-resolution shareable reports.
### Better Auth Integration
The platform migrated from NextAuth.js to Better Auth for improved type safety and MongoDB-native adapter support. The configuration enforces domain restriction at the provider level (`hd: "esnuam.org"`) and uses a lightweight MD5 hash utility (client-side implementation of RFC 1321) for email anonymization in hidden user lists, avoiding server round-trips for permission checks.
User synchronization happens automatically on dashboard load via a `POST /api/users/sync` endpoint that upserts the session profile into the application user collection, ensuring avatars and names stay current without manual import.
### CSS Architecture with Design Tokens
The entire interface is styled through a single `globals.css` file using CSS custom properties for a consistent design system:
- **Colors**: `--bg-primary`, `--bg-secondary`, `--accent`, `--success`, `--warning`, `--danger`
- **Elevation**: `--shadow-sm`, `--shadow-md`, `--shadow-lg`, `--shadow-glow`
- **Motion**: `--transition-fast`, `--transition-normal`, `--transition-slow` with cubic-bezier easing
- **Shape**: `--radius-sm`, `--radius-md`, `--radius-lg`, `--radius-xl`
Components compose these tokens rather than hardcoding values. Modal locking adds/removes a `modal-open` class on `` that hides scrollbars and compensates with margin to prevent layout shift. The accordion system uses max-height transitions for smooth content expansion without JavaScript height measurement.