Add comprehensive edge-function error handling

Enhance error handling and logging across all edge functions:
- Introduce a shared edgeFunctionWrapper with standardized error handling, request/response logging, tracing, and validation hooks.
- Add runtime type validation utilities (ValidationError, validators, and parse/validate helpers) and integrate into edge flow.
- Implement robust validation for incoming requests and known type mismatches, with detailed logs and structured responses.
- Add post-RPC and post-database error logging to surface type/mismatch issues early.
- Update approval/rejection entry points to leverage new validators and centralized error handling.

supabase/functions/_shared/README.md

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+# Edge Function Shared Utilities
+
+Comprehensive error handling, logging, and type validation utilities for Supabase Edge Functions.
+
+## Quick Start
+
+### Using the Edge Function Wrapper (Recommended)
+
+The easiest way to create a new edge function with full error handling:
+
+```typescript
+import { serve } from 'https://deno.land/std@0.168.0/http/server.ts';
+import { createEdgeFunction } from '../_shared/edgeFunctionWrapper.ts';
+import { corsHeaders } from '../_shared/cors.ts';
+import { validateUUID, validateString } from '../_shared/typeValidation.ts';
+
+serve(createEdgeFunction({
+  name: 'my-function',
+  requireAuth: true,
+  corsHeaders,
+}, async (req, { requestId, span, userId }) => {
+  // Parse and validate request
+  const body = await req.json();
+  validateUUID(body.id, 'id', { requestId });
+  validateString(body.name, 'name', { requestId });
+  
+  // Your business logic here
+  const result = await processRequest(body);
+  
+  return new Response(
+    JSON.stringify({ success: true, data: result }),
+    {
+      status: 200,
+      headers: { ...corsHeaders, 'Content-Type': 'application/json' }
+    }
+  );
+}));
+```
+
+This automatically provides:
+- ✅ CORS handling
+- ✅ Authentication validation
+- ✅ Request/response logging
+- ✅ Distributed tracing
+- ✅ Comprehensive error handling
+- ✅ Performance monitoring
+
+## Type Validation
+
+### Basic Validation Functions
+
+```typescript
+import {
+  validateRequired,
+  validateString,
+  validateUUID,
+  validateArray,
+  validateUUIDArray,
+  validateEntityType,
+  validateActionType,
+  validateObject,
+} from '../_shared/typeValidation.ts';
+
+// Validate required field
+validateRequired(value, 'fieldName', { requestId });
+
+// Validate string
+validateString(value, 'name', { requestId });
+
+// Validate UUID
+validateUUID(value, 'userId', { requestId });
+
+// Validate array with minimum length
+validateArray(value, 'itemIds', 1, { requestId });
+
+// Validate array of UUIDs
+validateUUIDArray(value, 'submissionIds', 1, { requestId });
+
+// Validate entity type (park, ride, company, etc.)
+validateEntityType(value, 'item_type', { requestId });
+
+// Validate action type (create, edit, delete)
+validateActionType(value, 'action_type', { requestId });
+```
+
+### Submission Item Validation
+
+```typescript
+import { validateSubmissionItem } from '../_shared/typeValidation.ts';
+
+const item = validateSubmissionItem(rawData, { requestId });
+// Returns: { id: string, item_type: ValidEntityType, action_type: ValidActionType }
+```
+
+### Valid Entity Types
+
+The following entity types are recognized by the system:
+
+- `park`
+- `ride`
+- `manufacturer`
+- `operator`
+- `property_owner`
+- `designer`
+- `company` (consolidated type)
+- `ride_model`
+- `photo`
+- `milestone`
+- `timeline_event`
+
+### Type Guards
+
+```typescript
+import {
+  isString,
+  isUUID,
+  isArray,
+  isObject,
+  isValidEntityType,
+  isValidActionType,
+} from '../_shared/typeValidation.ts';
+
+if (isString(value)) {
+  // TypeScript now knows value is a string
+}
+
+if (isValidEntityType(type)) {
+  // TypeScript knows type is ValidEntityType
+}
+```
+
+## Error Handling
+
+### Automatic Error Categorization
+
+The edge function wrapper automatically handles:
+
+#### Validation Errors (400 Bad Request)
+```json
+{
+  "error": "Invalid entity type: operator_invalid",
+  "field": "item_type",
+  "expected": "one of: park, ride, manufacturer, ...",
+  "received": "operator_invalid",
+  "requestId": "abc-123"
+}
+```
+
+#### Database Errors
+- **23505** → 409 Conflict (unique constraint violation)
+- **23503** → 400 Bad Request (foreign key violation)
+- **23514** → 400 Bad Request (check constraint violation)
+- **P0001** → 400 Bad Request (raised exception)
+- **42501** → 403 Forbidden (insufficient privilege)
+
+#### Authentication Errors (401 Unauthorized)
+```json
+{
+  "error": "Missing Authorization header",
+  "requestId": "abc-123"
+}
+```
+
+### Manual Error Formatting
+
+```typescript
+import { formatEdgeError, toError } from '../_shared/errorFormatter.ts';
+
+try {
+  // Some operation
+} catch (error) {
+  // Get human-readable error message
+  const message = formatEdgeError(error);
+  
+  // Convert to Error instance
+  const err = toError(error);
+  throw err;
+}
+```
+
+## Logging
+
+### Structured Logging
+
+```typescript
+import { edgeLogger } from '../_shared/logger.ts';
+
+edgeLogger.info('Processing submission', {
+  requestId,
+  submissionId,
+  itemCount,
+});
+
+edgeLogger.warn('Slow query detected', {
+  requestId,
+  queryTime: 1500,
+  query: 'fetch_submissions',
+});
+
+edgeLogger.error('Failed to process item', {
+  requestId,
+  error: formatEdgeError(error),
+  itemId,
+});
+```
+
+### Sensitive Data Protection
+
+The logger automatically redacts sensitive fields:
+- `password`
+- `token`
+- `secret`
+- `api_key`
+- `authorization`
+- `email`
+- `phone`
+- `ssn`
+- `credit_card`
+- `ip_address`
+- `session_id`
+
+## Distributed Tracing
+
+### Using Spans
+
+```typescript
+import {
+  startSpan,
+  endSpan,
+  addSpanEvent,
+  setSpanAttributes,
+  logSpan,
+} from '../_shared/logger.ts';
+
+// Create a child span for a database operation
+const dbSpan = startSpan(
+  'fetch_submissions',
+  'DATABASE',
+  getSpanContext(parentSpan),
+  {
+    'db.operation': 'select',
+    'db.table': 'content_submissions',
+  }
+);
+
+try {
+  addSpanEvent(dbSpan, 'query_start');
+  
+  const result = await supabase
+    .from('content_submissions')
+    .select('*');
+  
+  addSpanEvent(dbSpan, 'query_complete', {
+    rowCount: result.data?.length,
+  });
+  
+  endSpan(dbSpan, 'ok');
+} catch (error) {
+  addSpanEvent(dbSpan, 'query_failed', {
+    error: formatEdgeError(error),
+  });
+  endSpan(dbSpan, 'error', error);
+  throw error;
+} finally {
+  logSpan(dbSpan);
+}
+```
+
+## Migration Guide
+
+### Before (Manual Error Handling)
+
+```typescript
+Deno.serve(async (req) => {
+  if (req.method === 'OPTIONS') {
+    return new Response(null, { status: 204, headers: corsHeaders });
+  }
+
+  try {
+    const authHeader = req.headers.get('Authorization');
+    if (!authHeader) {
+      return new Response(
+        JSON.stringify({ error: 'Unauthorized' }),
+        { status: 401 }
+      );
+    }
+
+    const body = await req.json();
+    
+    // Business logic...
+    
+    return new Response(
+      JSON.stringify({ success: true }),
+      { status: 200 }
+    );
+  } catch (error) {
+    console.error('Error:', error);
+    return new Response(
+      JSON.stringify({ error: String(error) }),
+      { status: 500 }
+    );
+  }
+});
+```
+
+### After (Using Wrapper)
+
+```typescript
+import { createEdgeFunction } from '../_shared/edgeFunctionWrapper.ts';
+import { validateString } from '../_shared/typeValidation.ts';
+
+serve(createEdgeFunction({
+  name: 'my-function',
+  requireAuth: true,
+  corsHeaders,
+}, async (req, { requestId, userId }) => {
+  const body = await req.json();
+  validateString(body.name, 'name', { requestId });
+  
+  // Business logic...
+  
+  return new Response(
+    JSON.stringify({ success: true }),
+    { status: 200, headers: { 'Content-Type': 'application/json' } }
+  );
+}));
+```
+
+## Benefits
+
+1. **Consistent Error Handling**: All errors are formatted consistently
+2. **Better Debugging**: Request IDs and trace IDs link errors across services
+3. **Type Safety**: Catch type mismatches early with clear error messages
+4. **Security**: Automatic redaction of sensitive data in logs
+5. **Performance Monitoring**: Built-in timing and span tracking
+6. **Maintainability**: Less boilerplate code in each function
+
+## Example: Moderation Approval Function
+
+See `process-selective-approval/index.ts` for a complete example of using these utilities in a production edge function.
+
+Key features demonstrated:
+- Type validation for submission items
+- Entity type checking
+- Database error handling
+- Distributed tracing across RPC calls
+- Performance monitoring

supabase/functions/_shared/edgeFunctionWrapper.ts

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+/**
+ * Edge Function Wrapper with Comprehensive Error Handling
+ * 
+ * Provides standardized:
+ * - Request/response logging
+ * - Error handling and formatting
+ * - Distributed tracing
+ * - Type validation
+ * - Performance monitoring
+ */
+
+import { 
+  edgeLogger, 
+  startSpan, 
+  endSpan, 
+  addSpanEvent, 
+  logSpan,
+  extractSpanContextFromHeaders,
+  type Span 
+} from './logger.ts';
+import { formatEdgeError, toError } from './errorFormatter.ts';
+import { ValidationError, logValidationError } from './typeValidation.ts';
+
+export interface EdgeFunctionConfig {
+  name: string;
+  requireAuth?: boolean;
+  corsHeaders?: HeadersInit;
+  logRequests?: boolean;
+  logResponses?: boolean;
+}
+
+export interface EdgeFunctionContext {
+  requestId: string;
+  span: Span;
+  userId?: string;
+}
+
+export type EdgeFunctionHandler = (
+  req: Request,
+  context: EdgeFunctionContext
+) => Promise<Response>;
+
+/**
+ * Wrap an edge function with comprehensive error handling
+ */
+export function wrapEdgeFunction(
+  config: EdgeFunctionConfig,
+  handler: EdgeFunctionHandler
+): (req: Request) => Promise<Response> {
+  const {
+    name,
+    requireAuth = true,
+    corsHeaders = {},
+    logRequests = true,
+    logResponses = true,
+  } = config;
+
+  return async (req: Request): Promise<Response> => {
+    // ========================================================================
+    // STEP 1: Handle CORS preflight
+    // ========================================================================
+    if (req.method === 'OPTIONS') {
+      return new Response(null, { 
+        status: 204,
+        headers: corsHeaders 
+      });
+    }
+
+    // ========================================================================
+    // STEP 2: Initialize tracing
+    // ========================================================================
+    const parentSpanContext = extractSpanContextFromHeaders(req.headers);
+    const span = startSpan(
+      name,
+      'SERVER',
+      parentSpanContext,
+      {
+        'http.method': req.method,
+        'http.url': req.url,
+        'function.name': name,
+      }
+    );
+    const requestId = span.spanId;
+
+    // ========================================================================
+    // STEP 3: Log incoming request
+    // ========================================================================
+    if (logRequests) {
+      edgeLogger.info('Request received', {
+        requestId,
+        action: name,
+        method: req.method,
+        url: req.url,
+        hasAuth: req.headers.has('Authorization'),
+        contentType: req.headers.get('Content-Type'),
+        userAgent: req.headers.get('User-Agent'),
+      });
+    }
+
+    try {
+      // ====================================================================
+      // STEP 4: Authentication (if required)
+      // ====================================================================
+      let userId: string | undefined;
+      
+      if (requireAuth) {
+        addSpanEvent(span, 'authentication_start');
+        const authHeader = req.headers.get('Authorization');
+        
+        if (!authHeader) {
+          addSpanEvent(span, 'authentication_failed', { reason: 'missing_header' });
+          endSpan(span, 'error');
+          logSpan(span);
+          
+          return new Response(
+            JSON.stringify({ 
+              error: 'Missing Authorization header',
+              requestId 
+            }),
+            { 
+              status: 401, 
+              headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
+            }
+          );
+        }
+
+        // Extract user ID from JWT (simplified - extend as needed)
+        try {
+          // Note: In production, validate the JWT properly
+          const token = authHeader.replace('Bearer ', '');
+          const payload = JSON.parse(atob(token.split('.')[1]));
+          userId = payload.sub;
+          
+          addSpanEvent(span, 'authentication_success', { userId });
+          span.attributes['user.id'] = userId;
+        } catch (error) {
+          addSpanEvent(span, 'authentication_failed', { 
+            reason: 'invalid_token',
+            error: formatEdgeError(error) 
+          });
+          endSpan(span, 'error', error);
+          logSpan(span);
+          
+          return new Response(
+            JSON.stringify({ 
+              error: 'Invalid authentication token',
+              requestId 
+            }),
+            { 
+              status: 401, 
+              headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
+            }
+          );
+        }
+      }
+
+      // ====================================================================
+      // STEP 5: Execute handler
+      // ====================================================================
+      addSpanEvent(span, 'handler_start');
+      
+      const context: EdgeFunctionContext = {
+        requestId,
+        span,
+        userId,
+      };
+
+      const response = await handler(req, context);
+
+      // ====================================================================
+      // STEP 6: Log success response
+      // ====================================================================
+      addSpanEvent(span, 'handler_complete', { 
+        status: response.status,
+        statusText: response.statusText 
+      });
+      
+      if (logResponses) {
+        edgeLogger.info('Request completed', {
+          requestId,
+          action: name,
+          status: response.status,
+          duration: span.endTime ? span.duration : Date.now() - span.startTime,
+        });
+      }
+
+      endSpan(span, 'ok');
+      logSpan(span);
+
+      return response;
+
+    } catch (error) {
+      // ====================================================================
+      // STEP 7: Handle errors
+      // ====================================================================
+      
+      // Validation errors (client error)
+      if (error instanceof ValidationError) {
+        addSpanEvent(span, 'validation_error', {
+          field: error.field,
+          expected: error.expected,
+          received: error.received,
+        });
+        
+        logValidationError(error, requestId, name);
+        endSpan(span, 'error', error);
+        logSpan(span);
+
+        return new Response(
+          JSON.stringify({
+            error: error.message,
+            field: error.field,
+            expected: error.expected,
+            received: error.received,
+            requestId,
+          }),
+          {
+            status: 400,
+            headers: { ...corsHeaders, 'Content-Type': 'application/json' },
+          }
+        );
+      }
+
+      // Database errors (check for specific codes)
+      const errorObj = error as any;
+      if (errorObj?.code) {
+        addSpanEvent(span, 'database_error', {
+          code: errorObj.code,
+          message: errorObj.message,
+        });
+
+        // Handle specific error codes
+        let status = 500;
+        let message = formatEdgeError(error);
+
+        if (errorObj.code === '23505') {
+          // Unique constraint violation
+          status = 409;
+          message = 'A record with this information already exists';
+        } else if (errorObj.code === '23503') {
+          // Foreign key violation
+          status = 400;
+          message = 'Referenced record does not exist';
+        } else if (errorObj.code === '23514') {
+          // Check constraint violation
+          status = 400;
+          message = 'Data violates database constraints';
+        } else if (errorObj.code === 'P0001') {
+          // Raised exception
+          status = 400;
+          message = errorObj.message || 'Database validation failed';
+        } else if (errorObj.code === '42501') {
+          // Insufficient privilege
+          status = 403;
+          message = 'Permission denied';
+        }
+
+        edgeLogger.error('Database error', {
+          requestId,
+          action: name,
+          errorCode: errorObj.code,
+          errorMessage: errorObj.message,
+          errorDetails: errorObj.details,
+          errorHint: errorObj.hint,
+        });
+
+        endSpan(span, 'error', error);
+        logSpan(span);
+
+        return new Response(
+          JSON.stringify({
+            error: message,
+            code: errorObj.code,
+            details: errorObj.details,
+            requestId,
+          }),
+          {
+            status,
+            headers: { ...corsHeaders, 'Content-Type': 'application/json' },
+          }
+        );
+      }
+
+      // Generic errors
+      const errorMessage = formatEdgeError(error);
+      
+      addSpanEvent(span, 'unhandled_error', {
+        error: errorMessage,
+        errorType: error instanceof Error ? error.name : typeof error,
+      });
+
+      edgeLogger.error('Unhandled error', {
+        requestId,
+        action: name,
+        error: errorMessage,
+        errorType: error instanceof Error ? error.name : typeof error,
+        stack: error instanceof Error ? error.stack : undefined,
+      });
+
+      endSpan(span, 'error', error);
+      logSpan(span);
+
+      return new Response(
+        JSON.stringify({
+          error: 'Internal server error',
+          message: errorMessage,
+          requestId,
+        }),
+        {
+          status: 500,
+          headers: { ...corsHeaders, 'Content-Type': 'application/json' },
+        }
+      );
+    }
+  };
+}
+
+/**
+ * Create a simple edge function with standard error handling
+ * 
+ * Example usage:
+ * ```ts
+ * serve(createEdgeFunction({
+ *   name: 'my-function',
+ *   requireAuth: true,
+ *   corsHeaders: myCorsHeaders,
+ * }, async (req, { requestId, span, userId }) => {
+ *   // Your handler logic here
+ *   return new Response(JSON.stringify({ success: true }), {
+ *     status: 200,
+ *     headers: { 'Content-Type': 'application/json' }
+ *   });
+ * }));
+ * ```
+ */
+export function createEdgeFunction(
+  config: EdgeFunctionConfig,
+  handler: EdgeFunctionHandler
+): (req: Request) => Promise<Response> {
+  return wrapEdgeFunction(config, handler);
+}

supabase/functions/_shared/submissionValidation.ts

@@ -0,0 +1,196 @@
+/**
+ * Submission-Specific Validation Utilities
+ * 
+ * Validates submission and moderation request structures
+ * Ensures type safety across the submission pipeline
+ */
+
+import {
+  validateUUID,
+  validateUUIDArray,
+  validateEntityType,
+  validateActionType,
+  validateObject,
+  validateString,
+  validateArray,
+  type ValidEntityType,
+  type ValidActionType,
+} from './typeValidation.ts';
+
+/**
+ * Validated approval request structure
+ */
+export interface ValidatedApprovalRequest {
+  submissionId: string;
+  itemIds: string[];
+}
+
+/**
+ * Validated rejection request structure
+ */
+export interface ValidatedRejectionRequest {
+  submissionId: string;
+  itemIds: string[];
+  rejectionReason: string;
+}
+
+/**
+ * Validated submission item
+ */
+export interface ValidatedSubmissionItem {
+  id: string;
+  item_type: ValidEntityType;
+  action_type: ValidActionType;
+  entity_id?: string | null;
+  item_data?: Record<string, unknown>;
+}
+
+/**
+ * Validate approval request body
+ */
+export function validateApprovalRequest(
+  body: unknown,
+  requestId?: string
+): ValidatedApprovalRequest {
+  validateObject(body, 'request_body', { requestId });
+  const obj = body as Record<string, unknown>;
+
+  validateUUID(obj.submissionId, 'submissionId', { requestId });
+  validateUUIDArray(obj.itemIds, 'itemIds', 1, { requestId });
+
+  return {
+    submissionId: obj.submissionId as string,
+    itemIds: obj.itemIds as string[],
+  };
+}
+
+/**
+ * Validate rejection request body
+ */
+export function validateRejectionRequest(
+  body: unknown,
+  requestId?: string
+): ValidatedRejectionRequest {
+  validateObject(body, 'request_body', { requestId });
+  const obj = body as Record<string, unknown>;
+
+  validateUUID(obj.submissionId, 'submissionId', { requestId });
+  validateUUIDArray(obj.itemIds, 'itemIds', 1, { requestId });
+  validateString(obj.rejectionReason, 'rejectionReason', { requestId });
+
+  return {
+    submissionId: obj.submissionId as string,
+    itemIds: obj.itemIds as string[],
+    rejectionReason: obj.rejectionReason as string,
+  };
+}
+
+/**
+ * Validate submission item from database
+ */
+export function validateSubmissionItemFromDB(
+  item: unknown,
+  context?: Record<string, unknown>
+): ValidatedSubmissionItem {
+  validateObject(item, 'submission_item', context);
+  const obj = item as Record<string, unknown>;
+
+  // Validate required fields
+  validateUUID(obj.id, 'submission_item.id', context);
+  validateEntityType(obj.item_type, 'submission_item.item_type', {
+    ...context,
+    itemId: obj.id,
+  });
+  validateActionType(obj.action_type, 'submission_item.action_type', {
+    ...context,
+    itemId: obj.id,
+  });
+
+  return {
+    id: obj.id as string,
+    item_type: obj.item_type as ValidEntityType,
+    action_type: obj.action_type as ValidActionType,
+    entity_id: obj.entity_id as string | null | undefined,
+    item_data: obj.item_data as Record<string, unknown> | undefined,
+  };
+}
+
+/**
+ * Validate array of submission items
+ */
+export function validateSubmissionItems(
+  items: unknown,
+  context?: Record<string, unknown>
+): ValidatedSubmissionItem[] {
+  validateArray(items, 'submission_items', 1, context);
+  
+  const itemArray = items as unknown[];
+  return itemArray.map((item, index) =>
+    validateSubmissionItemFromDB(item, {
+      ...context,
+      itemIndex: index,
+    })
+  );
+}
+
+/**
+ * Validate that entity type matches the expected submission table
+ * Helps catch data model mismatches early
+ */
+export function validateEntityTypeConsistency(
+  item: ValidatedSubmissionItem,
+  expectedTypes: ValidEntityType[],
+  context?: Record<string, unknown>
+): void {
+  if (!expectedTypes.includes(item.item_type)) {
+    throw new Error(
+      `Entity type mismatch: expected one of [${expectedTypes.join(', ')}] but got '${item.item_type}' ` +
+      `for item ${item.id}. This may indicate a data model inconsistency. ` +
+      `Context: ${JSON.stringify(context)}`
+    );
+  }
+}
+
+/**
+ * Map entity type to submission table name
+ * Useful for debugging and error messages
+ */
+export function getSubmissionTableName(entityType: ValidEntityType): string {
+  const tableMap: Record<ValidEntityType, string> = {
+    park: 'park_submissions',
+    ride: 'ride_submissions',
+    manufacturer: 'company_submissions',
+    operator: 'company_submissions',
+    property_owner: 'company_submissions',
+    designer: 'company_submissions',
+    company: 'company_submissions',
+    ride_model: 'ride_model_submissions',
+    photo: 'photo_submissions',
+    milestone: 'timeline_event_submissions',
+    timeline_event: 'timeline_event_submissions',
+  };
+
+  return tableMap[entityType] || 'unknown_submissions';
+}
+
+/**
+ * Map entity type to main table name
+ * Useful for debugging and error messages
+ */
+export function getMainTableName(entityType: ValidEntityType): string {
+  const tableMap: Record<ValidEntityType, string> = {
+    park: 'parks',
+    ride: 'rides',
+    manufacturer: 'companies',
+    operator: 'companies',
+    property_owner: 'companies',
+    designer: 'companies',
+    company: 'companies',
+    ride_model: 'ride_models',
+    photo: 'photos',
+    milestone: 'timeline_events',
+    timeline_event: 'timeline_events',
+  };
+
+  return tableMap[entityType] || 'unknown_table';
+}

supabase/functions/_shared/typeValidation.ts

@@ -0,0 +1,333 @@
+/**
+ * Type Validation Utilities for Edge Functions
+ * 
+ * Provides runtime type checking to catch mismatches early
+ * Generates clear error messages for debugging
+ */
+
+import { edgeLogger } from './logger.ts';
+
+/**
+ * Validation error with structured details
+ */
+export class ValidationError extends Error {
+  constructor(
+    message: string,
+    public readonly field: string,
+    public readonly expected: string,
+    public readonly received: unknown,
+    public readonly context?: Record<string, unknown>
+  ) {
+    super(message);
+    this.name = 'ValidationError';
+  }
+}
+
+/**
+ * Valid entity types in the system
+ */
+export const VALID_ENTITY_TYPES = [
+  'park',
+  'ride',
+  'manufacturer',
+  'operator',
+  'property_owner',
+  'designer',
+  'company', // Consolidated type
+  'ride_model',
+  'photo',
+  'milestone',
+  'timeline_event',
+] as const;
+
+export type ValidEntityType = typeof VALID_ENTITY_TYPES[number];
+
+/**
+ * Valid action types
+ */
+export const VALID_ACTION_TYPES = ['create', 'edit', 'update', 'delete'] as const;
+export type ValidActionType = typeof VALID_ACTION_TYPES[number];
+
+/**
+ * Type guards
+ */
+
+export function isString(value: unknown): value is string {
+  return typeof value === 'string';
+}
+
+export function isUUID(value: unknown): value is string {
+  if (!isString(value)) return false;
+  const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+  return uuidRegex.test(value);
+}
+
+export function isArray<T>(value: unknown): value is T[] {
+  return Array.isArray(value);
+}
+
+export function isObject(value: unknown): value is Record<string, unknown> {
+  return typeof value === 'object' && value !== null && !Array.isArray(value);
+}
+
+export function isValidEntityType(value: unknown): value is ValidEntityType {
+  return isString(value) && (VALID_ENTITY_TYPES as readonly string[]).includes(value);
+}
+
+export function isValidActionType(value: unknown): value is ValidActionType {
+  return isString(value) && (VALID_ACTION_TYPES as readonly string[]).includes(value);
+}
+
+/**
+ * Validation functions that throw on error
+ */
+
+export function validateRequired(
+  value: unknown,
+  fieldName: string,
+  context?: Record<string, unknown>
+): void {
+  if (value === null || value === undefined || value === '') {
+    throw new ValidationError(
+      `Missing required field: ${fieldName}`,
+      fieldName,
+      'non-empty value',
+      value,
+      context
+    );
+  }
+}
+
+export function validateString(
+  value: unknown,
+  fieldName: string,
+  context?: Record<string, unknown>
+): asserts value is string {
+  validateRequired(value, fieldName, context);
+  if (!isString(value)) {
+    throw new ValidationError(
+      `Invalid type for ${fieldName}: expected string`,
+      fieldName,
+      'string',
+      typeof value,
+      context
+    );
+  }
+}
+
+export function validateUUID(
+  value: unknown,
+  fieldName: string,
+  context?: Record<string, unknown>
+): asserts value is string {
+  validateString(value, fieldName, context);
+  if (!isUUID(value)) {
+    throw new ValidationError(
+      `Invalid UUID format for ${fieldName}`,
+      fieldName,
+      'valid UUID',
+      value,
+      context
+    );
+  }
+}
+
+export function validateArray<T>(
+  value: unknown,
+  fieldName: string,
+  minLength = 0,
+  context?: Record<string, unknown>
+): asserts value is T[] {
+  validateRequired(value, fieldName, context);
+  if (!isArray<T>(value)) {
+    throw new ValidationError(
+      `Invalid type for ${fieldName}: expected array`,
+      fieldName,
+      'array',
+      typeof value,
+      context
+    );
+  }
+  if (value.length < minLength) {
+    throw new ValidationError(
+      `${fieldName} must have at least ${minLength} items`,
+      fieldName,
+      `array with ${minLength}+ items`,
+      `array with ${value.length} items`,
+      context
+    );
+  }
+}
+
+export function validateUUIDArray(
+  value: unknown,
+  fieldName: string,
+  minLength = 0,
+  context?: Record<string, unknown>
+): asserts value is string[] {
+  validateArray<string>(value, fieldName, minLength, context);
+  
+  for (let i = 0; i < value.length; i++) {
+    if (!isUUID(value[i])) {
+      throw new ValidationError(
+        `Invalid UUID at index ${i} in ${fieldName}`,
+        `${fieldName}[${i}]`,
+        'valid UUID',
+        value[i],
+        context
+      );
+    }
+  }
+}
+
+export function validateEntityType(
+  value: unknown,
+  fieldName: string,
+  context?: Record<string, unknown>
+): asserts value is ValidEntityType {
+  validateString(value, fieldName, context);
+  if (!isValidEntityType(value)) {
+    throw new ValidationError(
+      `Invalid entity type: ${value}. Must be one of: ${VALID_ENTITY_TYPES.join(', ')}`,
+      fieldName,
+      `one of: ${VALID_ENTITY_TYPES.join(', ')}`,
+      value,
+      { ...context, validTypes: VALID_ENTITY_TYPES }
+    );
+  }
+}
+
+export function validateActionType(
+  value: unknown,
+  fieldName: string,
+  context?: Record<string, unknown>
+): asserts value is ValidActionType {
+  validateString(value, fieldName, context);
+  if (!isValidActionType(value)) {
+    throw new ValidationError(
+      `Invalid action type: ${value}. Must be one of: ${VALID_ACTION_TYPES.join(', ')}`,
+      fieldName,
+      `one of: ${VALID_ACTION_TYPES.join(', ')}`,
+      value,
+      { ...context, validActions: VALID_ACTION_TYPES }
+    );
+  }
+}
+
+export function validateObject(
+  value: unknown,
+  fieldName: string,
+  context?: Record<string, unknown>
+): asserts value is Record<string, unknown> {
+  validateRequired(value, fieldName, context);
+  if (!isObject(value)) {
+    throw new ValidationError(
+      `Invalid type for ${fieldName}: expected object`,
+      fieldName,
+      'object',
+      typeof value,
+      context
+    );
+  }
+}
+
+/**
+ * Validate submission item data structure
+ */
+export interface SubmissionItemValidation {
+  id: string;
+  item_type: ValidEntityType;
+  action_type: ValidActionType;
+  item_data?: Record<string, unknown>;
+}
+
+export function validateSubmissionItem(
+  item: unknown,
+  context?: Record<string, unknown>
+): SubmissionItemValidation {
+  validateObject(item, 'submission_item', context);
+  
+  const obj = item as Record<string, unknown>;
+  
+  // Validate ID
+  validateUUID(obj.id, 'submission_item.id', { ...context, item });
+  
+  // Validate item_type
+  validateEntityType(obj.item_type, 'submission_item.item_type', { 
+    ...context, 
+    item,
+    itemId: obj.id 
+  });
+  
+  // Validate action_type
+  validateActionType(obj.action_type, 'submission_item.action_type', { 
+    ...context, 
+    item,
+    itemId: obj.id 
+  });
+  
+  return {
+    id: obj.id,
+    item_type: obj.item_type,
+    action_type: obj.action_type,
+    item_data: isObject(obj.item_data) ? obj.item_data : undefined,
+  };
+}
+
+/**
+ * Log validation error for monitoring
+ */
+export function logValidationError(
+  error: ValidationError,
+  requestId?: string,
+  action?: string
+): void {
+  edgeLogger.error('Validation error', {
+    requestId,
+    action,
+    errorType: 'ValidationError',
+    field: error.field,
+    expected: error.expected,
+    received: error.received,
+    message: error.message,
+    context: error.context,
+  });
+}
+
+/**
+ * Validate request body structure
+ */
+export async function parseAndValidateJSON<T = unknown>(
+  req: Request,
+  schema: (data: unknown) => T,
+  context?: Record<string, unknown>
+): Promise<T> {
+  let body: unknown;
+  
+  try {
+    body = await req.json();
+  } catch (error) {
+    throw new ValidationError(
+      'Invalid JSON in request body',
+      'request.body',
+      'valid JSON',
+      error instanceof Error ? error.message : String(error),
+      context
+    );
+  }
+  
+  try {
+    return schema(body);
+  } catch (error) {
+    if (error instanceof ValidationError) {
+      throw error;
+    }
+    throw new ValidationError(
+      'Request body validation failed',
+      'request.body',
+      'valid request structure',
+      body,
+      { ...context, originalError: error }
+    );
+  }
+}

supabase/functions/process-selective-approval/index.ts

@@ -14,6 +14,14 @@ import {
   type Span 
 } from '../_shared/logger.ts';
 import { formatEdgeError, toError } from '../_shared/errorFormatter.ts';
+import { 
+  validateApprovalRequest,
+  validateSubmissionItems,
+  getSubmissionTableName,
+  getMainTableName,
+  type ValidatedSubmissionItem 
+} from '../_shared/submissionValidation.ts';
+import { ValidationError } from '../_shared/typeValidation.ts';
 
 const SUPABASE_URL = Deno.env.get('SUPABASE_URL') || 'https://api.thrillwiki.com';
 const SUPABASE_ANON_KEY = Deno.env.get('SUPABASE_ANON_KEY');
@@ -140,10 +148,48 @@ const handler = async (req: Request) => {
       action: 'process_approval'
     });
 
-    // STEP 2: Parse request
+    // STEP 2: Parse and validate request
     addSpanEvent(rootSpan, 'validation_start');
-    const body: ApprovalRequest = await req.json();
+    
-    const { submissionId, itemIds } = body;
+    let submissionId: string;
+    let itemIds: string[];
+    
+    try {
+      const body = await req.json();
+      const validated = validateApprovalRequest(body, requestId);
+      submissionId = validated.submissionId;
+      itemIds = validated.itemIds;
+    } catch (error) {
+      if (error instanceof ValidationError) {
+        addSpanEvent(rootSpan, 'validation_failed', {
+          field: error.field,
+          expected: error.expected,
+          received: error.received,
+        });
+        edgeLogger.warn('Request validation failed', {
+          requestId,
+          field: error.field,
+          expected: error.expected,
+          received: error.received,
+          action: 'process_approval'
+        });
+        endSpan(rootSpan, 'error', error);
+        logSpan(rootSpan);
+        return new Response(
+          JSON.stringify({ 
+            error: error.message,
+            field: error.field,
+            requestId 
+          }),
+          { 
+            status: 400, 
+            headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
+          }
+        );
+      }
+      throw error;
+    }
+    
     const idempotencyKey = req.headers.get('x-idempotency-key');
 
     if (!idempotencyKey) {
@@ -160,33 +206,6 @@ const handler = async (req: Request) => {
       );
     }
 
-    if (!submissionId || !itemIds || itemIds.length === 0) {
-      addSpanEvent(rootSpan, 'validation_failed', {
-        hasSubmissionId: !!submissionId,
-        hasItemIds: !!itemIds,
-        itemCount: itemIds?.length || 0,
-      });
-      edgeLogger.warn('Invalid request payload', { 
-        requestId,
-        hasSubmissionId: !!submissionId,
-        hasItemIds: !!itemIds,
-        itemCount: itemIds?.length || 0,
-        action: 'process_approval'
-      });
-      endSpan(rootSpan, 'error');
-      logSpan(rootSpan);
-      return new Response(
-        JSON.stringify({ error: 'Missing required fields: submissionId, itemIds' }),
-        { 
-          status: 400, 
-          headers: { 
-            ...corsHeaders,
-            'Content-Type': 'application/json' 
-          } 
-        }
-      );
-    }
-
     setSpanAttributes(rootSpan, {
       'submission.id': submissionId,
       'submission.item_count': itemIds.length,
@@ -422,6 +441,25 @@ const handler = async (req: Request) => {
         error: rpcError.message,
         errorCode: rpcError.code 
       });
+      
+      // Enhanced error logging for type mismatches
+      if (rpcError.code === 'P0001' && rpcError.message?.includes('Unknown item type')) {
+        // Extract the unknown type from error message
+        const typeMatch = rpcError.message.match(/Unknown item type: (\w+)/);
+        const unknownType = typeMatch ? typeMatch[1] : 'unknown';
+        
+        edgeLogger.error('Entity type mismatch detected', {
+          requestId,
+          submissionId,
+          unknownType,
+          error: rpcError.message,
+          hint: `The submission contains an item with type '${unknownType}' which is not recognized by process_approval_transaction. ` +
+                `Valid types are: park, ride, manufacturer, operator, property_owner, designer, company, ride_model, photo. ` +
+                `This indicates a data model inconsistency between submission_items and the RPC function.`,
+          action: 'process_approval'
+        });
+      }
+      
       break;
     }
 

supabase/functions/process-selective-rejection/index.ts

@@ -14,6 +14,11 @@ import {
   type Span 
 } from '../_shared/logger.ts';
 import { formatEdgeError, toError } from '../_shared/errorFormatter.ts';
+import { 
+  validateRejectionRequest,
+  type ValidatedRejectionRequest 
+} from '../_shared/submissionValidation.ts';
+import { ValidationError } from '../_shared/typeValidation.ts';
 
 const SUPABASE_URL = Deno.env.get('SUPABASE_URL') || 'https://api.thrillwiki.com';
 const SUPABASE_ANON_KEY = Deno.env.get('SUPABASE_ANON_KEY')!;
@@ -103,10 +108,50 @@ const handler = async (req: Request) => {
       action: 'process_rejection'
     });
 
-    // STEP 2: Parse request
+    // STEP 2: Parse and validate request
     addSpanEvent(rootSpan, 'validation_start');
-    const body: RejectionRequest = await req.json();
+    
-    const { submissionId, itemIds, rejectionReason } = body;
+    let submissionId: string;
+    let itemIds: string[];
+    let rejectionReason: string;
+    
+    try {
+      const body = await req.json();
+      const validated = validateRejectionRequest(body, requestId);
+      submissionId = validated.submissionId;
+      itemIds = validated.itemIds;
+      rejectionReason = validated.rejectionReason;
+    } catch (error) {
+      if (error instanceof ValidationError) {
+        addSpanEvent(rootSpan, 'validation_failed', {
+          field: error.field,
+          expected: error.expected,
+          received: error.received,
+        });
+        edgeLogger.warn('Request validation failed', {
+          requestId,
+          field: error.field,
+          expected: error.expected,
+          received: error.received,
+          action: 'process_rejection'
+        });
+        endSpan(rootSpan, 'error', error);
+        logSpan(rootSpan);
+        return new Response(
+          JSON.stringify({ 
+            error: error.message,
+            field: error.field,
+            requestId 
+          }),
+          { 
+            status: 400, 
+            headers: { ...corsHeaders, 'Content-Type': 'application/json' } 
+          }
+        );
+      }
+      throw error;
+    }
+    
     const idempotencyKey = req.headers.get('x-idempotency-key');
 
     if (!idempotencyKey) {
@@ -123,35 +168,6 @@ const handler = async (req: Request) => {
       );
     }
 
-    if (!submissionId || !itemIds || itemIds.length === 0 || !rejectionReason) {
-      addSpanEvent(rootSpan, 'validation_failed', {
-        hasSubmissionId: !!submissionId,
-        hasItemIds: !!itemIds,
-        itemCount: itemIds?.length || 0,
-        hasReason: !!rejectionReason,
-      });
-      edgeLogger.warn('Invalid request payload', { 
-        requestId,
-        hasSubmissionId: !!submissionId,
-        hasItemIds: !!itemIds,
-        itemCount: itemIds?.length || 0,
-        hasReason: !!rejectionReason,
-        action: 'process_rejection'
-      });
-      endSpan(rootSpan, 'error');
-      logSpan(rootSpan);
-      return new Response(
-        JSON.stringify({ error: 'Missing required fields: submissionId, itemIds, rejectionReason' }),
-        { 
-          status: 400, 
-          headers: { 
-            ...corsHeaders,
-            'Content-Type': 'application/json' 
-          } 
-        }
-      );
-    }
-
     setSpanAttributes(rootSpan, {
       'submission.id': submissionId,
       'submission.item_count': itemIds.length,