Code Summarizer MCP

/** * Custom error classes for better error handling and categorization */ // Base error class with additional properties export class BaseError extends Error { public readonly code: string; public readonly isRetryable: boolean; public readonly statusCode: number; public readonly context?: Record<string, any>; constructor(message: string, options?: { code?: string; isRetryable?: boolean; statusCode?: number; context?: Record<string, any>; }) { super(message); this.name = this.constructor.name; this.code = options?.code || 'UNKNOWN_ERROR'; this.isRetryable = options?.isRetryable || false; this.statusCode = options?.statusCode || 500; this.context = options?.context; // Maintain proper stack trace Error.captureStackTrace(this, this.constructor); } } // Authentication related errors export class AuthError extends BaseError { constructor(message: string, options?: { isRetryable?: boolean; context?: Record<string, any>; }) { super(message, { ...(options || {}), code: 'AUTH_ERROR', statusCode: 401, }); } } // API key specific errors export class ApiKeyError extends BaseError { constructor(message: string, options?: { isRetryable?: boolean; context?: Record<string, any>; }) { super(message, { ...(options || {}), code: 'INVALID_API_KEY', statusCode: 401, }); } } // LLM related errors export class LLMError extends BaseError { constructor(message: string, options?: { isRetryable?: boolean; statusCode?: number; context?: Record<string, any>; }) { super(message, { ...(options || {}), code: 'LLM_ERROR', isRetryable: options?.isRetryable !== undefined ? options.isRetryable : true, }); } } // File system related errors export class FileSystemError extends BaseError { constructor(message: string, options?: { isRetryable?: boolean; statusCode?: number; context?: Record<string, any>; }) { super(message, { ...(options || {}), code: 'FILE_SYSTEM_ERROR', }); } } // Configuration related errors export class ConfigError extends BaseError { constructor(message: string, options?: { isRetryable?: boolean; statusCode?: number; context?: Record<string, any>; }) { super(message, { ...(options || {}), code: 'CONFIG_ERROR', }); } } // Helper to wrap an error in appropriate custom error type export function wrapError(error: unknown, defaultMessage = 'An unexpected error occurred'): BaseError { if (error instanceof BaseError) { return error; } const message = error instanceof Error ? error.message : String(error); // Categorize based on message patterns if (message.includes('API key') || message.includes('apiKey')) { return new ApiKeyError(message); } if (message.includes('file not found') || message.includes('ENOENT')) { return new FileSystemError(message); } if (message.includes('config') || message.includes('configuration')) { return new ConfigError(message); } // Default case return new BaseError(message || defaultMessage); } // Error handler for logging and response formatting export function handleError(error: unknown): { message: string; code: string; status: number } { const wrappedError = wrapError(error); // Log error with context if available console.error(`[${wrappedError.code}] ${wrappedError.message}`, wrappedError.context ? wrappedError.context : ''); return { message: wrappedError.message, code: wrappedError.code, status: wrappedError.statusCode }; }