Implement Phase 3: Enhanced Error Handling

This commit implements Phase 3 of the Sacred Pipeline, focusing on enhanced error handling. It includes: - **Transaction Status Polling Endpoint**: A new edge function `check-transaction-status` allows clients to poll the status of moderation transactions using idempotency keys. - **Expanded Error Sanitizer Patterns**: The `src/lib/errorSanitizer.ts` file has been updated with more comprehensive patterns to remove sensitive information from error messages, making them safer for display and logging. User-friendly replacements for common errors are also included. - **Rate Limiting for Submission Creation**: Client-side rate limiting has been implemented in `src/lib/submissionRateLimiter.ts` and applied to key submission functions within `src/lib/entitySubmissionHelpers.ts` (e.g., `submitParkCreation`, `submitRideCreation`, `submitParkUpdate`, `submitRideUpdate`) to prevent abuse and accidental duplicate submissions.
2025-12-20 04:51:11 -05:00 · 2025-11-07 18:22:27 +00:00
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+# Phase 3: Enhanced Error Handling - COMPLETE
+
+**Status**: ✅ Fully Implemented
+**Date**: 2025-01-07
+
+## Overview
+
+Phase 3 adds comprehensive error handling improvements to the Sacred Pipeline, including transaction status polling, enhanced error sanitization, and client-side rate limiting for submission creation.
+
+## Components Implemented
+
+### 1. Transaction Status Polling Endpoint
+
+**Edge Function**: `check-transaction-status`
+**Purpose**: Allows clients to poll the status of moderation transactions using idempotency keys
+
+**Features**:
+- Query transaction status by idempotency key
+- Returns detailed status information (pending, processing, completed, failed, expired)
+- User authentication and authorization (users can only check their own transactions)
+- Structured error responses
+- Comprehensive logging
+
+**Usage**:
+```typescript
+const { data, error } = await supabase.functions.invoke('check-transaction-status', {
+  body: { idempotencyKey: 'approval_submission123_...' }
+});
+
+// Response includes:
+// - status: 'pending' | 'processing' | 'completed' | 'failed' | 'expired' | 'not_found'
+// - createdAt, updatedAt, expiresAt
+// - attempts, lastError (if failed)
+// - action, submissionId
+```
+
+**API Endpoints**:
+- `POST /check-transaction-status` - Check status by idempotency key
+- Requires: Authentication header
+- Returns: StatusResponse with transaction details
+
+### 2. Error Sanitizer
+
+**File**: `src/lib/errorSanitizer.ts`
+**Purpose**: Removes sensitive information from error messages before display or logging
+
+**Sensitive Patterns Detected**:
+- Authentication tokens (Bearer, JWT, API keys)
+- Database connection strings (PostgreSQL, MySQL)
+- Internal IP addresses
+- Email addresses in error messages
+- UUIDs (internal IDs)
+- File paths (Unix & Windows)
+- Stack traces with file paths
+- SQL queries revealing schema
+
+**User-Friendly Replacements**:
+- Database constraint errors → "This item already exists", "Required field missing"
+- Auth errors → "Session expired. Please log in again"
+- Network errors → "Service temporarily unavailable"
+- Rate limiting → "Rate limit exceeded. Please wait before trying again"
+- Permission errors → "Access denied"
+
+**Functions**:
+- `sanitizeErrorMessage(error, context?)` - Main sanitization function
+- `containsSensitiveData(message)` - Check if message has sensitive data
+- `sanitizeErrorForLogging(error)` - Sanitize for external logging
+- `createSafeErrorResponse(error, fallbackMessage?)` - Create user-safe error response
+
+**Examples**:
+```typescript
+import { sanitizeErrorMessage } from '@/lib/errorSanitizer';
+
+try {
+  // ... operation
+} catch (error) {
+  const safeMessage = sanitizeErrorMessage(error, {
+    action: 'park_creation',
+    userId: user.id
+  });
+  
+  toast({
+    title: 'Error',
+    description: safeMessage,
+    variant: 'destructive'
+  });
+}
+```
+
+### 3. Submission Rate Limiting
+
+**File**: `src/lib/submissionRateLimiter.ts`
+**Purpose**: Client-side rate limiting to prevent submission abuse and accidental duplicates
+
+**Rate Limits**:
+- **Per Minute**: 5 submissions maximum
+- **Per Hour**: 20 submissions maximum
+- **Cooldown**: 60 seconds after exceeding limits
+
+**Features**:
+- In-memory rate limit tracking (per session)
+- Automatic timestamp cleanup
+- User-specific limits
+- Cooldown period after limit exceeded
+- Detailed logging
+
+**Integration**: Applied to all submission functions in `entitySubmissionHelpers.ts`:
+- `submitParkCreation`
+- `submitParkUpdate`
+- `submitRideCreation`
+- `submitRideUpdate`
+- Composite submissions
+
+**Functions**:
+- `checkSubmissionRateLimit(userId, config?)` - Check if user can submit
+- `recordSubmissionAttempt(userId)` - Record a submission (called after success)
+- `getRateLimitStatus(userId)` - Get current rate limit status
+- `clearUserRateLimit(userId)` - Clear limits (admin/testing)
+
+**Usage**:
+```typescript
+// In entitySubmissionHelpers.ts
+function checkRateLimitOrThrow(userId: string, action: string): void {
+  const rateLimit = checkSubmissionRateLimit(userId);
+  
+  if (!rateLimit.allowed) {
+    throw new Error(sanitizeErrorMessage(rateLimit.reason));
+  }
+}
+
+// Called at the start of every submission function
+export async function submitParkCreation(data, userId) {
+  checkRateLimitOrThrow(userId, 'park_creation');
+  // ... rest of submission logic
+}
+```
+
+**Response Example**:
+```typescript
+{
+  allowed: false,
+  reason: 'Too many submissions in a short time. Please wait 60 seconds',
+  retryAfter: 60
+}
+```
+
+## Architecture Adherence
+
+✅ **No JSON/JSONB**: Error sanitizer operates on strings, rate limiter uses in-memory storage
+✅ **Relational**: Transaction status queries the `idempotency_keys` table
+✅ **Type Safety**: Full TypeScript types for all interfaces
+✅ **Logging**: Comprehensive structured logging for debugging
+
+## Security Benefits
+
+1. **Sensitive Data Protection**: Error messages no longer expose internal details
+2. **Rate Limit Protection**: Prevents submission flooding and abuse
+3. **Transaction Visibility**: Users can check their own transaction status safely
+4. **Audit Trail**: All rate limit events logged for security monitoring
+
+## Error Flow Integration
+
+```
+User Action
+    ↓
+Rate Limit Check ────→ Block if exceeded
+    ↓
+Submission Creation
+    ↓
+Error Occurs ────→ Sanitize Error Message
+    ↓
+Display to User (Safe Message)
+    ↓
+Log to System (Detailed, Sanitized)
+```
+
+## Testing Checklist
+
+- [x] Edge function deploys successfully
+- [x] Transaction status polling works with valid keys
+- [x] Transaction status returns 404 for invalid keys
+- [x] Users cannot access other users' transaction status
+- [x] Error sanitizer removes sensitive patterns
+- [x] Error sanitizer provides user-friendly messages
+- [x] Rate limiter blocks after per-minute limit
+- [x] Rate limiter blocks after per-hour limit
+- [x] Rate limiter cooldown period works
+- [x] Rate limiting applied to all submission functions
+- [x] Sanitized errors logged correctly
+
+## Related Files
+
+### Core Implementation
+- `supabase/functions/check-transaction-status/index.ts` - Transaction polling endpoint
+- `src/lib/errorSanitizer.ts` - Error message sanitization
+- `src/lib/submissionRateLimiter.ts` - Client-side rate limiting
+- `src/lib/entitySubmissionHelpers.ts` - Integrated rate limiting
+
+### Dependencies
+- `src/lib/idempotencyLifecycle.ts` - Idempotency key lifecycle management
+- `src/lib/logger.ts` - Structured logging
+- `supabase/functions/_shared/logger.ts` - Edge function logging
+
+## Performance Considerations
+
+1. **In-Memory Storage**: Rate limiter uses Map for O(1) lookups
+2. **Automatic Cleanup**: Old timestamps removed on each check
+3. **Minimal Overhead**: Pattern matching optimized with pre-compiled regexes
+4. **Database Queries**: Transaction status uses indexed lookup on idempotency_keys.key
+
+## Future Enhancements
+
+Potential improvements for future phases:
+
+1. **Persistent Rate Limiting**: Store rate limits in database for cross-session tracking
+2. **Dynamic Rate Limits**: Adjust limits based on user reputation/role
+3. **Advanced Sanitization**: Context-aware sanitization based on error types
+4. **Error Pattern Learning**: ML-based detection of new sensitive patterns
+5. **Transaction Webhooks**: Real-time notifications when transactions complete
+6. **Rate Limit Dashboard**: Admin UI to view and manage rate limits
+
+## API Reference
+
+### Check Transaction Status
+
+**Endpoint**: `POST /functions/v1/check-transaction-status`
+
+**Request**:
+```json
+{
+  "idempotencyKey": "approval_submission_abc123_..."
+}
+```
+
+**Response** (200 OK):
+```json
+{
+  "status": "completed",
+  "createdAt": "2025-01-07T10:30:00Z",
+  "updatedAt": "2025-01-07T10:30:05Z",
+  "expiresAt": "2025-01-08T10:30:00Z",
+  "attempts": 1,
+  "action": "approval",
+  "submissionId": "abc123",
+  "completedAt": "2025-01-07T10:30:05Z"
+}
+```
+
+**Response** (404 Not Found):
+```json
+{
+  "status": "not_found",
+  "error": "Transaction not found. It may have expired or never existed."
+}
+```
+
+**Response** (401/403):
+```json
+{
+  "error": "Unauthorized",
+  "status": "not_found"
+}
+```
+
+## Migration Notes
+
+No database migrations required for this phase. All functionality is:
+- Edge function (auto-deployed)
+- Client-side utilities (imported as needed)
+- Integration into existing submission functions
+
+## Monitoring
+
+Key metrics to monitor:
+
+1. **Rate Limit Events**: Track users hitting limits
+2. **Sanitization Events**: Count messages requiring sanitization
+3. **Transaction Status Queries**: Monitor polling frequency
+4. **Error Patterns**: Identify common sanitized error types
+
+Query examples in admin dashboard:
+```sql
+-- Rate limit violations (from logs)
+SELECT COUNT(*) FROM request_metadata
+WHERE error_message LIKE '%Rate limit exceeded%'
+GROUP BY DATE(created_at);
+
+-- Transaction status queries
+-- (Check edge function logs for check-transaction-status)
+```
+
+---
+
+**Phase 3 Status**: ✅ Complete
+**Next Phase**: Phase 4 or additional enhancements as needed