reorg

includes/infrastructure/error_handler.js

@@ -0,0 +1,77 @@
+const { logError } = require('./logger');
+
+/**
+ * Creates a user-friendly error message from an error object
+ * @param {Error} err - Error object
+ * @returns {string} - User-friendly error message
+ */
+function getUserFriendlyError(err) {
+  if (!err) {
+    return 'An unknown error occurred';
+  }
+
+  // Handle specific error types
+  if (err.code === 'EADDRINUSE') {
+    return 'The requested port is already in use. Please choose a different port.';
+  }
+  
+  if (err.code === 'ENOENT') {
+    return 'The requested file or directory was not found.';
+  }
+  
+  if (err.code === 'EACCES') {
+    return 'Permission denied. Please ensure you have the necessary permissions.';
+  }
+  
+  if (err.code === 'ECONNREFUSED') {
+    return 'Connection refused. The service may not be running.';
+  }
+  
+  if (err.code === 'ETIMEDOUT') {
+    return 'Operation timed out. Please try again.';
+  }
+  
+  // Check for validation errors
+  if (err.message && err.message.includes('validation') || err.message.includes('Invalid')) {
+    return err.message;
+  }
+  
+  // Generic error message
+  if (err.message) {
+    // Don't expose internal error details in production
+    if (process.env.NODE_ENV === 'production') {
+      return 'An error occurred processing your request. Please try again.';
+    }
+    return err.message;
+  }
+  
+  return 'An unexpected error occurred. Please try again.';
+}
+
+/**
+ * Creates an error response object
+ * @param {Error} err - Error object
+ * @param {number} defaultStatusCode - Default HTTP status code
+ * @returns {object} - Error response object
+ */
+function createErrorResponse(err, defaultStatusCode = 500) {
+  const message = getUserFriendlyError(err);
+  const statusCode = err.statusCode || err.status || defaultStatusCode;
+  
+  logError('ErrorHandler', `Error: ${err.message || err} (Status: ${statusCode})`);
+  
+  return {
+    statusCode,
+    headers: {
+      'Content-Type': 'application/json'
+    },
+    body: JSON.stringify({
+      error: err.name || 'Error',
+      message: message,
+      ...(process.env.NODE_ENV !== 'production' && err.stack ? { stack: err.stack } : {})
+    })
+  };
+}
+
+module.exports = { getUserFriendlyError, createErrorResponse };
+