# PayPal & Stripe Payment Gateway Integration Guide

## Implementation Status

### ✅ Completed Components

1. **PHP SDKs Installed**
   - PayPal REST API SDK (`paypal/rest-api-sdk-php`)
   - Stripe PHP SDK (`stripe/stripe-php`)

2. **Service Classes Created**
   - `app/Services/PayPalPaymentService.php` - Handles all PayPal operations
   - `app/Services/StripePaymentService.php` - Handles all Stripe operations

3. **Payment Settings UI**
   - Added PayPal configuration section with Client ID and Secret
   - Added Stripe configuration section with Publishable Key and Secret Key
   - Environment toggles (Sandbox/Live for PayPal, Test/Live for Stripe)
   - Test connection buttons for both gateways
   - Webhook URL display and copy functionality

4. **Checkout Controller Updated**
   - Added PayPal payment processing flow
   - Added Stripe checkout session creation flow
   - Validation updated to accept 'paypal' and 'stripe' as payment methods

### 🔄 Remaining Tasks

1. **Add Callback Handlers**
   - PayPal success/cancel handlers in CheckoutController
   - Stripe success/cancel handlers in CheckoutController

2. **Create Webhook Controllers**
   - PayPalWebhookController for payment status updates
   - StripeWebhookController for payment events

3. **Add Routes**
   - Payment callback routes (success/cancel)
   - Webhook routes for both gateways
   - Test connection routes in WebsiteController

4. **Update Checkout Page UI**
   - Show PayPal option when enabled
   - Show Stripe option when enabled
   - Update payment method selection logic

5. **WebsiteController Updates**
   - Add `testPayPalConnection()` method
   - Add `testStripeConnection()` method

## Configuration

### PayPal Settings
- **Client ID**: From PayPal Developer Dashboard
- **Secret**: From PayPal Developer Dashboard
- **Environment**: Sandbox (test) or Live (production)
- **Webhook URL**: `/api/webhooks/paypal/{website_id}`

### Stripe Settings
- **Publishable Key**: pk_test_xxx or pk_live_xxx
- **Secret Key**: sk_test_xxx or sk_live_xxx
- **Webhook Secret**: whsec_xxx (optional)
- **Environment**: Test or Live (determined by key prefix)
- **Webhook URL**: `/api/webhooks/stripe/{website_id}`

## Payment Flow

### PayPal Flow
1. Customer selects PayPal at checkout
2. System creates PayPal payment via PayPalPaymentService
3. Customer redirected to PayPal approval URL
4. Customer approves payment on PayPal
5. PayPal redirects back to success URL
6. System executes payment and updates order status

### Stripe Flow
1. Customer selects Stripe at checkout
2. System creates Stripe Checkout Session
3. Customer redirected to Stripe Checkout page
4. Customer completes payment on Stripe
5. Stripe redirects back to success URL
6. Webhook confirms payment (async)
7. System updates order status

## Required Routes (To Be Added)

```php
// PayPal Routes
Route::get('/payment/paypal/success', [CheckoutController::class, 'paypalSuccess']);
Route::get('/payment/paypal/cancel', [CheckoutController::class, 'paypalCancel']);

// Stripe Routes
Route::get('/payment/stripe/success', [CheckoutController::class, 'stripeSuccess']);
Route::get('/payment/stripe/cancel', [CheckoutController::class, 'stripeCancel']);

// Webhook Routes
Route::post('/api/webhooks/paypal/{website}', [PayPalWebhookController::class, 'handle']);
Route::post('/api/webhooks/stripe/{website}', [StripeWebhookController::class, 'handle']);

// Test Connection Routes
Route::post('/websites/{website}/settings/test-paypal', [WebsiteController::class, 'testPayPalConnection']);
Route::post('/websites/{website}/settings/test-stripe', [WebsiteController::class, 'testStripeConnection']);
```

## Next Steps

To complete the integration, we need to:

1. Add callback handler methods to CheckoutController
2. Create PayPalWebhookController
3. Create StripeWebhookController
4. Add all the routes mentioned above
5. Update the checkout page UI to show PayPal/Stripe options
6. Add test connection methods to WebsiteController
7. Test the entire flow end-to-end

Would you like me to continue with these remaining tasks?