Garden Stack Implementation Guide

✅ Improvements Implemented

1. Backend Security & Validation

✅ Email validation with regex pattern
✅ Stock checking before checkout
✅ Rate limiting (10 requests/minute)
✅ Input validation for cart items
✅ Improved error messages (no internal details exposed)
✅ Duplicate webhook processing prevention

2. Frontend Optimization

✅ Extracted JavaScript to separate files (js/app.js)
✅ Created lazy loading system (js/image-utils.js)
✅ WebP support detection and fallback
✅ CSS optimization file (css/main.css)
✅ Configuration centralization (js/config.js)

3. Database Improvements

✅ Added indexes for order_status and payment_status
✅ Created composite indexes for common queries
✅ Added data integrity constraints
✅ Created order summary view
✅ Automatic order total updates trigger

📋 How to Use the New Files

1. Update your index.html:

<!-- In the <head> section -->
<link rel="stylesheet" href="css/main.css">

<!-- Before closing </body> -->
<script src="js/config.js"></script>
<script src="js/image-utils.js"></script>
<script src="js/app.js"></script>
<script>
    // Initialize Alpine with our app
    document.addEventListener('alpine:init', () => {
        Alpine.data('gardenStackApp', window.gardenStackApp);
    });
</script>

2. Update images for lazy loading:

<!-- Change from: -->
<img src="path/to/image.jpg" alt="Description">

<!-- To: -->
<img data-src="path/to/image.jpg" 
     src="data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 400 300'%3E%3C/svg%3E"
     alt="Description" 
     class="lazy responsive-img">

3. Update configuration:

// In js/config.js, update:
api: {
    supabaseUrl: 'YOUR_ACTUAL_SUPABASE_URL',
    stripePublicKey: 'YOUR_ACTUAL_STRIPE_KEY'
}

4. Apply database migrations:

# Run the new migration
npx supabase migration up

🚀 Next Steps

Update the Supabase URL in js/config.js and js/app.js
Convert remaining JPG images to WebP format
Set up error monitoring (Sentry recommended)
Add automated tests for the checkout flow
Consider implementing a CDN for static assets
Add order confirmation emails

⚠️ Important Notes

SEPA functionality has been removed as requested
Stock levels are currently hardcoded - move to database for production
Rate limiting is in-memory - consider Redis for production
Remember to update the Stripe webhook URL in your Stripe dashboard

🔒 Security Improvements

All user inputs are now validated
Error messages don't expose internal details
Rate limiting prevents abuse
Webhook signatures are verified
Database has proper constraints