Presearch MCP Server

import logger from "../core/logger.js"; export class AppError extends Error { constructor(message, code, statusCode = 500) { super(message); this.name = "AppError"; this.code = code; this.statusCode = statusCode; } } export class ValidationError extends AppError { constructor(message) { super(message, "VALIDATION_ERROR", 400); this.name = "ValidationError"; } } export class AuthenticationError extends AppError { constructor(message = "Authentication failed") { super(message, "AUTH_ERROR", 401); this.name = "AuthenticationError"; } } export class RateLimitError extends AppError { constructor(message = "Rate limit exceeded") { super(message, "RATE_LIMIT_ERROR", 429); this.name = "RateLimitError"; } } export class ExternalServiceError extends AppError { constructor(message, service) { super(`${service} error: ${message}`, "EXTERNAL_SERVICE_ERROR", 502); this.name = "ExternalServiceError"; this.service = service; } } /** * Wrapper for tool execution to handle errors consistently * @param {Function} fn - The async function to wrap * @returns {Function} Wrapped function with error handling */ export const withErrorHandling = (fn) => async (...args) => { try { return await fn(...args); } catch (error) { logger.error("Error executing tool", { error: error.message, stack: error.stack }); if (error instanceof AppError) { throw error; // Re-throw known app errors } // Convert unknown errors to AppError throw new AppError(`Internal error: ${error.message}`, "INTERNAL_ERROR"); } };