# Slim Uiltjies AfterCare — Invoice System

A beautiful, fully offline **Progressive Web App** for managing parents, children, invoices and payments for **Slim Uiltjies AfterCare** — built to match the look of the original branded receipt.

> _"A safe place to learn, grow and shine!"_

## What's included

- **Parents** — manage parent / guardian info (name, phone, email, address)
- **Children** — link learners to parents, set plan (Full Day / Half Day) and monthly fee
- **Invoices** — generate monthly invoices, auto-numbered (e.g. `SU-0001`)
- **Payments** — record cash / EFT / other payments, mark invoices paid
- **Statements** — beautiful "Statement of Payments Received" matching the original receipt
- **Sharing** — Share PDF via WhatsApp, email, or any app on the phone (Web Share API). Falls back to download + WhatsApp deep-link.
- **PWA** — installable on phone home screen, works **fully offline**, with custom owl mascot icons
- **Backup / restore** — export all data as JSON, import on any device
- **Branded** — cream paper background, purple primary, pink / yellow / green / blue accents, owl mascot

## Run it locally

This is a static app — no build step.

```bash
# Option 1: Python (built-in on macOS / Linux)
cd /path/to/SLIMUILTIES
python3 -m http.server 8080

# Option 2: Node
npx serve -l 8080

# Option 3: Any static server
```

Then open **http://localhost:8080** in any browser.

> **Tip:** For PWA install + service worker to work, you need `localhost` or `https://`. Plain `file://` won't.

## Install on a phone

Once deployed (locally or on the web):

1. Open the URL in **Chrome** (Android) or **Safari** (iOS).
2. **Android Chrome:** tap the menu (⋮) → "Install app" or "Add to Home screen".
3. **iOS Safari:** tap the Share button → "Add to Home Screen".

The app will appear on the home screen with the owl icon and open full-screen like a native app.

## Deploy to the web

Because it's 100% static, you can host it anywhere:

- **Netlify:** drag the folder onto [app.netlify.com/drop](https://app.netlify.com/drop)
- **Vercel:** `vercel deploy` from the project folder
- **Cloudflare Pages:** connect a Git repo
- **GitHub Pages:** push to a repo, enable Pages
- **Any web host:** upload the files via FTP

HTTPS is required for the service worker (PWA install).

## Project structure

```
SLIMUILTIES/
├── index.html                # App shell + splash screen
├── manifest.webmanifest      # PWA manifest (install + shortcuts)
├── sw.js                     # Service worker (offline cache)
├── css/
│   └── styles.css            # Design system + components
├── js/
│   ├── app.js                # Router + init
│   ├── views.js              # All screens (home, parents, invoices, etc.)
│   ├── invoice.js            # Invoice + statement HTML render
│   ├── pdf.js                # html2canvas + jsPDF wrapper
│   ├── share.js              # Web Share API + WhatsApp fallback
│   ├── db.js                 # IndexedDB layer
│   ├── seed.js               # Sample data (Slim Uiltjies example)
│   └── icons.js              # Inline SVG brand mark
├── vendor/
│   ├── jspdf.umd.min.js      # Vendored offline (357 KB)
│   └── html2canvas.min.js    # Vendored offline (194 KB)
├── icons/
│   ├── icon.svg              # SVG owl (used in manifest)
│   ├── icon-192.png          # PWA icon 192×192
│   ├── icon-512.png          # PWA icon 512×512
│   ├── apple-touch-icon.png  # iOS install icon
│   └── favicon-32.png        # Browser favicon
└── README.md
```

Total payload: ~600 KB (icons + CSS + JS + libs). Loads instantly after first install.

## Data model (IndexedDB)

| Store | Shape | Notes |
|---|---|---|
| `business` | single record `id='business'` | name, tagline, fees, banking, footer |
| `parents` | `{id, name, phone, email, address, notes}` | |
| `children` | `{id, parentId, name, plan, monthlyFee, startDate}` | indexed by `parentId` |
| `invoices` | `{id, number, childId, parentId, period, items[], subtotal, total, paid, balance, status, notes}` | indexed by `childId`, `parentId`, `period`, `status` |
| `payments` | `{id, invoiceId, date, amount, method, receivedBy}` | indexed by `invoiceId` |
| `meta` | `{id, value}` | seeded flag, next receipt number |

All data lives on the device — never sent to a server. Export to JSON for backup.

## How sharing works

1. User taps **Share PDF** on an invoice.
2. The invoice HTML is rendered off-screen.
3. **html2canvas** captures it as a pixel-perfect PNG.
4. **jsPDF** wraps the PNG into a multi-page A4 PDF.
5. **Web Share API** opens the phone's native share sheet — user picks WhatsApp / Gmail / Telegram / print / save to drive / etc.
6. If Web Share isn't available (older desktop browser), it falls back to a direct PDF download. A "WhatsApp" button also opens a `wa.me` deep-link with a pre-filled message.

## Default sample data

On first launch, the app seeds with realistic data:
- **3 parents**: Valentine, Nomsa Dlamini, Pieter van Wyk
- **4 children**: Tshireletso, Lerato, Themba, Mia (mix of Full Day / Half Day)
- **Historical payments** matching the original receipt (R500 / R1000 patterns)
- **Current-month invoices** for unpaid + paid examples

Tap **Settings → Data → Load sample data** to reseed anytime.

## Customization checklist

Go to **Settings** in the app:

- [x] Business name, tagline, address, phone, email, Facebook
- [x] Footer message on invoices
- [x] Default full-day & half-day fees
- [x] Receipt prefix & auto-numbering
- [x] Banking details (shown on every invoice)
- [x] Payment reference note

Or edit directly in `js/seed.js` before deploying.

## Browser support

| Feature | Required |
|---|---|
| IndexedDB | ✅ All modern browsers |
| Service Worker | ✅ Chrome, Edge, Firefox, Safari 11.1+ |
| Web Share API (files) | ✅ Chrome on Android, Safari on iOS |
| Web Share API (text) | ✅ All modern browsers |
| `display: standalone` | ✅ Chrome, Edge, Safari, Firefox |
| `<input type="date">` | ✅ All modern browsers |

For older browsers, the app degrades gracefully — `Share PDF` falls back to download + WhatsApp link.

## License

Built for Slim Uiltjies AfterCare. Use freely.