Refactor code structure and remove redundant changes

src-old/lib/aalErrorDetection.ts

@@ -0,0 +1,125 @@
+/**
+ * AAL2 Error Detection Utilities
+ * 
+ * Detects when operations fail due to AAL2/MFA requirements
+ * and provides user-friendly error messages
+ */
+
+import { PostgrestError } from '@supabase/supabase-js';
+
+/**
+ * Check if an error is due to AAL2/RLS policy failure
+ */
+export function isAAL2PolicyError(error: unknown): boolean {
+  if (!error) return false;
+  
+  // Handle Supabase PostgrestError
+  if (isPostgrestError(error)) {
+    const code = error.code;
+    const message = error.message?.toLowerCase() || '';
+    const details = error.details?.toLowerCase() || '';
+    
+    // Check for RLS policy violations
+    if (code === 'PGRST301' || code === '42501') {
+      return true;
+    }
+    
+    // Check for permission denied messages
+    if (
+      message.includes('permission denied') ||
+      message.includes('row-level security') ||
+      message.includes('policy') ||
+      details.includes('policy')
+    ) {
+      return true;
+    }
+  }
+  
+  // Handle generic errors with 403 status
+  if (hasStatusCode(error) && error.status === 403) {
+    return true;
+  }
+  
+  // Handle error messages
+  if (error instanceof Error) {
+    const message = error.message.toLowerCase();
+    return (
+      message.includes('row-level security') ||
+      message.includes('permission denied') ||
+      message.includes('policy') ||
+      message.includes('403')
+    );
+  }
+  
+  return false;
+}
+
+/**
+ * Get user-friendly error message for AAL2 errors
+ */
+export function getAAL2ErrorMessage(error: unknown): string {
+  // Default message
+  const defaultMessage = 'This action requires additional security verification';
+  
+  if (!error) return defaultMessage;
+  
+  // Check if error mentions specific operations
+  if (error instanceof Error) {
+    const message = error.message.toLowerCase();
+    
+    if (message.includes('delete') || message.includes('remove')) {
+      return 'Deleting this data requires additional security verification';
+    }
+    
+    if (message.includes('update') || message.includes('modify')) {
+      return 'Modifying this data requires additional security verification';
+    }
+    
+    if (message.includes('insert') || message.includes('create')) {
+      return 'Creating this data requires additional security verification';
+    }
+  }
+  
+  return defaultMessage;
+}
+
+/**
+ * Type guard for PostgrestError
+ */
+function isPostgrestError(error: unknown): error is PostgrestError {
+  return (
+    typeof error === 'object' &&
+    error !== null &&
+    'code' in error &&
+    'message' in error
+  );
+}
+
+/**
+ * Type guard for errors with status code
+ */
+function hasStatusCode(error: unknown): error is { status: number } {
+  return (
+    typeof error === 'object' &&
+    error !== null &&
+    'status' in error &&
+    typeof (error as any).status === 'number'
+  );
+}
+
+/**
+ * Create a user-cancellation error
+ */
+export class MFACancelledError extends Error {
+  constructor() {
+    super('MFA verification was cancelled by user');
+    this.name = 'MFACancelledError';
+  }
+}
+
+/**
+ * Check if error is a user cancellation
+ */
+export function isMFACancelledError(error: unknown): boolean {
+  return error instanceof MFACancelledError;
+}