# Swift PWA Plugin

## 🔒 Security Enhanced Progressive Web App Plugin

This is a comprehensive WordPress plugin that transforms your website into a Progressive Web App (PWA) with enterprise-grade security features and modern implementation.

## 🚀 Quick Installation

1. **Activate the Plugin**
   - Go to WordPress Admin → Plugins
   - Find "Swift PWA" and click "Activate"

2. **Configure Settings**
   - Go to WordPress Admin → Swift PWA
   - Fill in your PWA settings
   - Upload icons and configure colors
   - Save settings

3. **Test PWA**
   - Check manifest: `yoursite.com/swift-pwa-manifest.json`
   - Check service worker: `yoursite.com/swift-pwa-sw.js`
   - Test offline functionality

## 🛡️ Security Features

### ✅ Fixed Vulnerabilities
- **File Upload Security** - Only allows safe image files with size limits
- **SQL Injection Prevention** - All database queries use prepared statements
- **XSS Protection** - All output properly escaped
- **CSRF Protection** - Nonce verification on all forms
- **Access Control** - Admin-only access with capability checks
- **Rate Limiting** - Prevents form submission abuse
- **Path Security** - Prevents directory traversal attacks

### ✅ Modern Implementation
- **Workbox 7.0.0** - Latest version with security patches
- **Smart Caching** - Secure caching strategies
- **Cache Management** - Option to clear cache manually
- **Error Handling** - Comprehensive error logging
- **Input Validation** - All inputs properly validated
- **Output Escaping** - All outputs properly escaped

## 📋 Requirements

- WordPress 5.0+
- PHP 7.4+
- HTTPS (required for PWA functionality)
- File upload permissions
- Database write permissions

## 🔧 Configuration

### Required Settings
1. **Application Name** - The full name of your PWA
2. **Short Name** - Short name (max 15 characters)
3. **Icons** - Upload app icons (192x192 and 512x512 recommended)
4. **Theme Colors** - Set background and theme colors

### Optional Settings
1. **Assets** - Specify additional files to precache
2. **Precache Pages** - Select pages to cache for offline access
3. **Display Mode** - Choose how the app appears
4. **Orientation** - Set app orientation

## 🧪 Testing

### Security Tests
- Try uploading non-image files (should be rejected)
- Try uploading oversized files (should be rejected)
- Test admin access without proper permissions

### PWA Tests
- Check manifest file accessibility
- Verify service worker registration
- Test offline functionality
- Test app installation

## 🔍 Troubleshooting

### Common Issues

1. **Service Worker Not Registering**
   - Ensure HTTPS is enabled
   - Check browser console for errors
   - Verify service worker file is accessible

2. **File Uploads Failing**
   - Check file size limits (2MB max)
   - Verify file type is allowed (PNG, JPG, GIF, WebP)
   - Check server upload limits

3. **Admin Access Denied**
   - Verify user has 'manage_options' capability
   - Check if nonce verification is failing
   - Clear browser cache and cookies

### Debug Mode
Enable debug mode by setting `workbox.setConfig({ debug: true })` in the service worker for development.

## 📊 Performance

### Caching Strategies
- **HTML Pages** - StaleWhileRevalidate for better UX
- **Static Assets** - CacheFirst for performance
- **Images** - CacheFirst with size limits
- **Fonts** - CacheFirst with long expiration
- **Admin Pages** - NetworkOnly for security

### Cache Management
- Automatic cache cleanup on activation
- Version-based cache naming
- Proper cache expiration
- Size limits to prevent storage issues

## 🔄 Updates

This plugin includes:
- Automatic security updates
- Modern Workbox implementation
- Regular security patches
- Performance improvements

## 📞 Support

For issues or questions:
1. Check error logs first
2. Verify all requirements are met
3. Test with minimal configuration
4. Contact support with specific error messages

## 📄 License

GPL v2 or later - https://www.gnu.org/licenses/gpl-2.0.html

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**Security Note**: This plugin has been thoroughly security-audited and includes comprehensive protection against common web vulnerabilities. Always keep WordPress and plugins updated for the best security.