stripe integrated api

Author: Gerome El-assaad

CHANGELOG.md

@@ -2,6 +2,212 @@
 
 All notable changes to this project will be documented in this file.
 
+## [v0.0.38] - 2025-08-11
+
+### 💳 Added
+- **Complete Stripe Payment System**: Full subscription billing infrastructure for pro features
+  - Integrated Stripe SDK with checkout, billing portal, and webhook handling
+  - Created Pro ($20/month) and Enterprise ($100/month) subscription plans
+  - Implemented secure payment processing with PCI compliance
+  - Added customer portal for subscription management, payment methods, and invoices
+
+- **Usage Tracking & Limits System**: Real-time feature usage monitoring with enforcement
+  - GitHub repository import limits: 5/month (Free), 50/month (Pro), Unlimited (Enterprise)
+  - Storage limits: 100MB (Free), 5GB (Pro), Unlimited (Enterprise)
+  - API call limits: 1K/month (Free), 50K/month (Pro), Unlimited (Enterprise)
+  - Execution time limits: 30s (Free), 300s (Pro), 600s (Enterprise)
+  - Automatic usage reset and tracking with monthly billing cycles
+
+- **Smart Upgrade System**: Contextual upgrade prompts and seamless plan transitions
+  - Upgrade dialog with feature comparison and pricing details
+  - Automatic upgrade prompts when users hit feature limits
+  - Real-time usage displays in GitHub import interface
+  - Plan recommendation engine based on user behavior
+
+### 🗃️ Enhanced
+- **Database Schema**: Production-ready subscription and usage tracking tables
+  - Added subscription columns to teams table (Stripe customer/subscription IDs, billing dates)
+  - Created team_usage_limits table for real-time usage monitoring
+  - Built subscription_events table for comprehensive audit logging
+  - Implemented usage validation and increment functions with PostgreSQL
+
+- **Billing Interface**: Complete billing management experience
+  - Updated billing settings page with real Stripe integration
+  - Added usage visualization with progress bars and limit indicators
+  - Integrated plan comparison with feature breakdowns
+  - Built subscription status monitoring with renewal/cancellation dates
+
+- **GitHub Integration**: Enhanced with usage-based access control
+  - Added usage limit enforcement to repository import functionality
+  - Created dedicated GitHub import API endpoint with tracking
+  - Integrated upgrade prompts directly into import workflow
+  - Added real-time usage feedback in import interface
+
+### 🔧 Fixed
+- **TypeScript Compliance**: Resolved all payment system type errors
+  - Added proper null checking for Stripe client initialization
+  - Fixed API route type safety with comprehensive error handling
+  - Ensured build compatibility with conditional Stripe loading
+
+- **Build System**: Production-ready deployment configuration
+  - Added graceful Stripe degradation when environment variables missing
+  - Implemented proper error boundaries for payment components
+  - Fixed all ESLint and TypeScript compilation errors
+
+### 🛠️ Technical Implementation
+- **API Endpoints**: Complete payment processing infrastructure
+  - `/api/stripe/checkout` - Creates Stripe checkout sessions for plan upgrades
+  - `/api/stripe/portal` - Generates customer portal sessions for billing management
+  - `/api/stripe/webhooks` - Handles subscription lifecycle events from Stripe
+  - `/api/subscription/usage` - Provides real-time usage and subscription data
+  - `/api/integrations/github/import` - Enhanced GitHub import with usage tracking
+
+- **Middleware & Utilities**: Robust usage validation and tracking system
+  - Created usage tracking middleware for feature access validation
+  - Built subscription management utilities with team-based billing
+  - Implemented feature limit checking with upgrade requirement detection
+  - Added usage increment functions with atomic database operations
+
+### 📚 Documentation
+- **Setup Guide**: Comprehensive Stripe integration documentation
+  - Created detailed setup guide (`docs/STRIPE_SETUP.md`) with step-by-step instructions
+  - Added environment variable configuration examples
+  - Included webhook setup and testing procedures
+  - Provided troubleshooting guide with common issues and solutions
+
+- **Database Migration**: Production-ready SQL migration scripts
+  - Built complete migration (`migrations/001_add_subscriptions_fixed.sql`)
+  - Added proper constraint checking and error handling
+  - Included usage limit initialization for existing teams
+  - Created indexes for optimal query performance
+
+### 🔒 Security
+- **Payment Security**: Industry-standard security implementation
+  - Webhook signature verification for all Stripe events
+  - Secure API key management with environment-based configuration
+  - Protected customer data with proper access controls
+  - Implemented usage validation to prevent quota bypass
+
+---
+
+## [v0.0.36] - 2025-08-10
+
+### 🚨 Critical Fixes
+
+#### Fixed Core Template Parameter Error
+- **Resolved critical "Cannot read properties of undefined (reading 'join')" error** that was preventing message submissions
+- Fixed template parameter passing in chat API to prevent build failures
+- Added null safety checks to template processing functions
+- This fix eliminates the primary cause of "error please try again" messages
+
+#### Build & Deployment Stability
+- Fixed syntax errors that were causing Vercel deployment failures
+- Resolved merge conflicts in template handling
+- Ensured successful production builds across all environments
+
+### ⚡ Enhanced Error Handling
+
+#### Structured Error Responses
+- **Comprehensive API error handling** with detailed, structured error responses
+- **Specific error types** for different failure scenarios:
+  - Rate limiting errors with retry suggestions
+  - Network connectivity issues
+  - Invalid API key errors
+  - Service overload notifications
+  - Model availability errors
+
+#### Improved User Experience
+- **Actionable error messages** instead of generic "error please try again"
+- **Smart error parsing** that displays user-friendly messages
+- **Context-aware error handling** that provides specific solutions
+- **Better error recovery** with automatic retry logic for network issues
+
+#### Enhanced API Routes
+- **Chat API (`/api/chat`)**: Added detailed error logging and structured responses
+- **Sandbox API (`/api/sandbox`)**: Improved E2B error handling with proper sandbox cleanup
+- **Code Execution**: Better error handling for execution failures
+
+### 🔄 Retry & Recovery Mechanisms
+
+#### Automatic Error Recovery
+- **Network error retry logic** with 2-second delay for failed submissions
+- **Intelligent error tracking** that resets on successful operations  
+- **Graceful degradation** when services are temporarily unavailable
+- **Proper resource cleanup** on sandbox execution failures
+
+#### Enhanced Chat Hook
+- Improved `useEnhancedChat` hook with better error recovery
+- Added execution state management to prevent duplicate requests
+- Enhanced error tracking with context preservation
+- Better timeout handling for long-running operations
+
+### 🛠️ Technical Improvements
+
+#### Code Quality
+- Fixed duplicate `finally` blocks and syntax errors
+- Improved TypeScript error handling
+- Added proper error boundaries and cleanup
+- Enhanced logging for debugging production issues
+
+#### Template System
+- Fixed template selection logic for AI model routing
+- Ensured proper template parameter passing across components
+- Added fallback mechanisms for template processing
+- Improved template validation and error reporting
+
+### 📝 Developer Experience
+
+#### Better Debugging
+- **Enhanced error logging** with structured error information
+- **Detailed error context** including provider, model, and request details
+- **Stack trace preservation** for easier debugging
+- **Production-safe error messages** that don't leak sensitive information
+
+#### Error Categories
+- `rate_limit`: Rate limiting exceeded
+- `service_overload`: AI service temporarily unavailable  
+- `auth_error`: Authentication/API key issues
+- `model_error`: AI model availability issues
+- `network_error`: Connectivity problems
+- `execution_error`: Code execution failures
+- `sandbox_creation_error`: E2B sandbox setup issues
+- `validation_error`: Input validation failures
+
+### 🚀 Performance & Reliability
+
+#### Improved Stability
+- Eliminated critical errors that were blocking user interactions
+- Enhanced error recovery prevents application crashes
+- Better resource management with proper cleanup
+- Improved build reliability for consistent deployments
+
+#### User Experience
+- **Faster error resolution** with specific guidance
+- **Reduced user frustration** through clear error messaging
+- **Better failure handling** that doesn't break the user flow
+- **Proactive error prevention** through better validation
+
+### 🔧 Breaking Changes
+None - This is a backward-compatible bug fix release.
+
+### 📦 Dependencies
+No new dependencies added. All improvements use existing infrastructure.
+
+### 🐛 Bug Fixes
+- Fixed template parameter undefined error causing message submission failures
+- Resolved build failures in production environments
+- Fixed duplicate error handling blocks
+- Corrected syntax errors in API routes
+- Resolved merge conflicts in template processing
+
+### 🔮 What's Next
+- Additional error handling improvements for edge cases
+- Enhanced retry logic with exponential backoff
+- More detailed error analytics and monitoring
+- Further improvements to user error messaging
+
+---
+
 ## [v0.0.34] - 2025-08-09
 
 ### 🤖 Added

RELEASE_NOTES.md

@@ -0,0 +1,174 @@
+# Release Notes
+
+## Version 0.0.38 - Complete Payment System & Subscription Billing 🚀
+
+**Release Date:** August 11, 2025
+
+### 💰 Major Feature Launch: Subscription Billing
+
+CodingIT now supports paid subscriptions with **Pro** and **Enterprise** plans, unlocking advanced features and higher usage limits for power users!
+
+#### 🎯 What's New
+- **Stripe Integration**: Full payment processing with industry-standard security
+- **Three-Tier System**: Free, Pro ($20/month), and Enterprise ($100/month) plans
+- **Usage-Based Features**: Smart limits that scale with your subscription level
+- **GitHub Repository Imports**: Import more projects with higher-tier plans
+- **Upgrade Prompts**: Contextual upgrade suggestions when you hit limits
+
+#### 💳 Subscription Plans
+
+| Feature | Free | Pro ($20/mo) | Enterprise ($100/mo) |
+|---------|------|--------------|---------------------|
+| GitHub Imports | 5/month | 50/month | Unlimited |
+| Storage | 100MB | 5GB | Unlimited |
+| API Calls | 1K/month | 50K/month | Unlimited |
+| Execution Time | 30 seconds | 5 minutes | 10 minutes |
+| Support | Community | Priority | Dedicated |
+
+### 🛠️ Technical Implementation
+
+#### Payment Infrastructure
+- **Stripe Checkout**: Seamless subscription signup and upgrades
+- **Customer Portal**: Self-service billing management for subscribers
+- **Webhook Processing**: Real-time subscription status updates
+- **Usage Tracking**: Accurate monitoring of feature consumption
+- **Security**: PCI-compliant payment processing and data protection
+
+#### Database Enhancements
+- **New Tables**: `team_usage_limits` and `subscription_events` for comprehensive tracking
+- **Usage Functions**: PostgreSQL functions for atomic usage validation and increments
+- **Audit Trail**: Complete subscription lifecycle logging for compliance
+
+#### Smart Upgrade System
+- **Context-Aware Prompts**: Upgrade dialogs appear when users need more resources
+- **Plan Comparison**: Clear feature breakdown to help users choose the right tier
+- **Real-Time Usage**: Live usage indicators in the GitHub import interface
+- **Seamless Transitions**: One-click upgrades with immediate feature access
+
+### 🚀 Enhanced Features
+
+#### Billing Management
+- **Updated Settings Page**: Complete billing overview with usage visualization
+- **Subscription Status**: Clear renewal dates, cancellation info, and plan details
+- **Usage Progress Bars**: Visual indicators showing monthly consumption
+- **Payment History**: Access to invoices and payment records
+
+#### GitHub Integration Improvements
+- **Import Limits**: Tiered access to repository imports based on subscription
+- **Usage Validation**: Pre-import checks to prevent quota overages
+- **Smart Notifications**: Upgrade suggestions integrated into the import flow
+- **Enhanced API**: New `/api/integrations/github/import` endpoint with tracking
+
+### 🔧 Developer Experience
+
+#### New API Endpoints
+```
+POST /api/stripe/checkout        # Create payment session
+POST /api/stripe/portal          # Access billing portal  
+POST /api/stripe/webhooks        # Handle subscription events
+GET  /api/subscription/usage     # Get usage and billing data
+POST /api/integrations/github/import  # Import with tracking
+```
+
+#### Usage Tracking Utilities
+- **Middleware**: `createUsageMiddleware()` for protecting API routes
+- **Validation**: `checkFeatureAccess()` for pre-flight checks
+- **Increments**: `trackFeatureUsage()` for atomic usage updates
+- **Limits**: `getFeatureLimits()` for plan-based restrictions
+
+### 📚 Documentation & Setup
+
+#### Comprehensive Guides
+- **Setup Documentation**: Complete Stripe integration guide (`docs/STRIPE_SETUP.md`)
+- **Migration Scripts**: Production-ready database migration
+- **Environment Config**: Detailed environment variable requirements
+- **Troubleshooting**: Common issues and resolution steps
+
+#### Production Ready
+- **Build Safety**: Graceful degradation when Stripe isn't configured
+- **Error Handling**: Comprehensive error boundaries and user feedback
+- **Type Safety**: Full TypeScript support with proper null checking
+- **Testing**: Development mode support with test card numbers
+
+### 🔒 Security & Compliance
+
+#### Payment Security
+- **Webhook Verification**: Stripe signature validation for all events
+- **Environment Variables**: Secure API key management
+- **Data Protection**: Customer information encrypted and secured
+- **Access Controls**: Team-based billing with proper authorization
+
+#### Usage Security  
+- **Quota Enforcement**: Server-side validation prevents quota bypass
+- **Atomic Operations**: Database functions ensure data consistency
+- **Audit Logging**: Complete trail of all subscription and usage events
+- **Rate Limiting**: Enhanced protection for payment endpoints
+
+### 🎨 User Experience Improvements
+
+#### Upgrade Flow
+- **Smart Detection**: System knows when you need more resources
+- **Plan Recommendations**: Suggests the best plan for your usage patterns
+- **One-Click Upgrades**: Streamlined checkout process
+- **Immediate Access**: Features unlock instantly after payment
+
+#### Visual Indicators
+- **Usage Progress**: Beautiful progress bars in billing settings
+- **Limit Warnings**: Gentle notifications before hitting limits  
+- **Plan Badges**: Clear indication of current subscription level
+- **Upgrade Buttons**: Contextual calls-to-action when limits are reached
+
+### 🚀 Performance & Reliability
+
+#### Optimized Infrastructure
+- **Efficient Queries**: Database indexes for fast usage lookups
+- **Cached Limits**: Team usage limits cached for performance
+- **Batch Operations**: Efficient bulk usage updates
+- **Connection Pooling**: Optimized database connections
+
+#### Error Resilience
+- **Graceful Degradation**: Works even when Stripe is unavailable
+- **Retry Logic**: Automatic retry for transient payment failures
+- **Fallback UI**: Clear messaging when payment features are disabled
+- **Recovery Mechanisms**: Smart error recovery for better reliability
+
+### 🔧 Breaking Changes
+None - This is a fully backward-compatible feature addition.
+
+### 📦 New Dependencies
+- `stripe: ^18.4.0` - Official Stripe SDK for payment processing
+
+### 🐛 Bug Fixes
+- Fixed TypeScript null checking issues with conditional Stripe initialization
+- Resolved SQL syntax errors in PostgreSQL migration scripts
+- Fixed build errors when Stripe environment variables are missing
+- Enhanced error handling in payment API endpoints
+
+### 🔮 What's Next
+- **Analytics Dashboard**: Detailed usage analytics for Pro+ subscribers  
+- **Team Billing**: Multi-user billing and team management features
+- **API Rate Limiting**: Enhanced rate limiting based on subscription tier
+- **Custom Limits**: Enterprise customers can request custom feature limits
+- **Invoice Management**: Advanced invoicing and billing controls
+
+### 🌟 Getting Started
+
+#### For New Users
+1. **Sign up** for a free account and explore the platform
+2. **Hit your limits?** Upgrade to Pro with one click for 50x more resources
+3. **Need unlimited?** Enterprise plan removes all restrictions
+
+#### For Existing Users
+1. **Visit** Settings → Billing to see your current usage
+2. **Compare** plans to see what upgrades unlock
+3. **Upgrade** instantly when you need more capacity
+
+---
+
+**Full Changelog:** [View on GitHub](https://github.com/Gerome-Elassaad/CodingIT/compare/v0.0.37...v0.0.38)
+
+**Contributors:** Development Team
+
+**Installation:** This version is automatically deployed to production. No manual installation required for hosted users.
+
+**Setup Guide:** See `docs/STRIPE_SETUP.md` for self-hosted installations.