Initial commit

server/middleware/errorHandler.js

@@ -0,0 +1,57 @@
+function errorHandler(error, req, res, next) {
+  console.error('Error occurred:', error);
+
+  // Default error response
+  let statusCode = 500;
+  let message = 'Internal server error';
+  let details = null;
+
+  // Handle specific error types
+  if (error.name === 'ValidationError') {
+    statusCode = 400;
+    message = 'Validation error';
+    details = error.details || error.message;
+  } else if (error.name === 'UnauthorizedError') {
+    statusCode = 401;
+    message = 'Unauthorized';
+  } else if (error.name === 'SequelizeValidationError') {
+    statusCode = 400;
+    message = 'Database validation error';
+    details = error.errors.map(err => ({
+      field: err.path,
+      message: err.message
+    }));
+  } else if (error.name === 'SequelizeUniqueConstraintError') {
+    statusCode = 409;
+    message = 'Resource already exists';
+    details = error.errors.map(err => ({
+      field: err.path,
+      message: err.message
+    }));
+  } else if (error.name === 'SequelizeForeignKeyConstraintError') {
+    statusCode = 400;
+    message = 'Invalid reference';
+  } else if (error.status) {
+    statusCode = error.status;
+    message = error.message;
+  }
+
+  // Send error response
+  const response = {
+    success: false,
+    message,
+    timestamp: new Date().toISOString()
+  };
+
+  // Include error details in development
+  if (process.env.NODE_ENV === 'development') {
+    response.error = details || error.message;
+    response.stack = error.stack;
+  } else if (details) {
+    response.details = details;
+  }
+
+  res.status(statusCode).json(response);
+}
+
+module.exports = errorHandler;