Initial commit

backend-node/middleware/errorHandler.js

@@ -0,0 +1,40 @@
+const { AppError } = require('../shared/errors');
+const ResponseHandler = require('../shared/response.handler');
+const config = require('../config');
+
+const errorHandler = (err, req, res, next) => {
+  if (config.isDevelopment) {
+    console.error('Error caught by middleware:', err);
+  }
+
+  if (err instanceof AppError) {
+    return ResponseHandler.error(res, err.message, err.statusCode, err.errors);
+  }
+
+  if (
+    err.name === 'SequelizeValidationError' ||
+    err.name === 'SequelizeUniqueConstraintError'
+  ) {
+    const errors = err.errors
+      ? err.errors.map((e) => ({ field: e.path, message: e.message }))
+      : null;
+    return ResponseHandler.badRequest(res, 'Validation error', errors);
+  }
+
+  if (err.name === 'ValidationError' && err.errors) {
+    const errors = Object.keys(err.errors).map((key) => ({
+      field: key,
+      message: err.errors[key].message,
+    }));
+    return ResponseHandler.badRequest(res, 'Validation error', errors);
+  }
+
+  if (err.name === 'CastError') {
+    return ResponseHandler.badRequest(res, 'Invalid ID format');
+  }
+
+  const message = config.isDevelopment ? err.message : 'Internal server error';
+  return ResponseHandler.internalError(res, message, err);
+};
+
+module.exports = errorHandler;