🧾 RPNAB Invoicing Portal

A single-page Rust web app for Rent & Petroleum Nordic AB, designed to streamline internal invoice processing and provide secure access for customers to view their invoice documents.

🎯 Project Goal

The primary goal is to increase operational efficiency by:

Enabling admin users to upload structured CSV transaction data
Storing and linking those transactions to invoice records
Allowing customers to log in and view/download invoice documents (HTML or PDF)
Providing a command-line interface for admin-only tasks

🧰 Tech Stack

Core Technologies

Layer	Tool	Description
Frontend	Leptos	Rust-based SPA framework with SSR support
Backend	Axum	Async Rust web framework
Database	MariaDB + `sqlx`	Compile-time verified SQL queries
Migrations	Goose	SQL migration runner
CSV Parsing	`csv`	High-performance CSV parser
CLI Tools	Rust + `clap`	Command-line admin tasks
PDF Generation	HTML + `wkhtmltopdf` or `weasyprint`	Generate styled invoice documents
Styling	Tailwind CSS (optional)	Utility-first styling framework

🗺️ Development Roadmap

Phase 1: Project Setup

Create Git repository
Initialize Rust workspace (Cargo.toml)
Set up frontend, backend, CLI structure
Write project README

Phase 2: Infrastructure

Add .env and config boilerplate
Set up Goose migration framework
Connect to MariaDB using sqlx
Define initial DB schema (users, invoices, transactions)

Phase 3: Admin Functions

Implement admin login (cookie-based)
Create CLI tool for CSV uploads
Parse CSV → normalize → store in DB
Web UI to verify and review uploads

Phase 4: Customer Portal

Implement customer login
Build UI to view invoice list
Render invoice details
Add option to download as PDF

Phase 5: Polish & Deploy

Input validation + error handling
Session persistence + CSRF protection
Serve behind reverse proxy (Caddy)
Deploy to FreeBSD jail

📁 Planned Project Structure

rpnab-invoicing/
├── frontend/       # Leptos SPA (Rust + WASM)
├── backend/        # Axum HTTP API
├── cli/            # Rust CLI binary for admin use
├── shared/         # Common logic, models, parsing helpers
├── migrations/     # Goose SQL migration scripts
├── static/         # Public assets (PDF templates, CSS)
├── .env            # Local config (not checked in)
└── Cargo.toml      # Workspace definition

🚧 Project Status

This project is in the planning and bootstrapping phase.
Initial development will begin in Q4 2025.

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