coderide

/** * Logger utility for consistent logging across the application */ export enum LogLevel { DEBUG = 0, INFO = 1, WARN = 2, ERROR = 3, } export class Logger { private static instance: Logger; private level: LogLevel; private constructor() { // Default to INFO if not specified const logLevel = process.env.LOG_LEVEL?.toLowerCase() || 'info'; switch (logLevel) { case 'debug': this.level = LogLevel.DEBUG; break; case 'info': this.level = LogLevel.INFO; break; case 'warn': this.level = LogLevel.WARN; break; case 'error': this.level = LogLevel.ERROR; break; default: this.level = LogLevel.INFO; } } public static getInstance(): Logger { if (!Logger.instance) { Logger.instance = new Logger(); } return Logger.instance; } private formatMessage(level: string, message: string, context?: Record<string, unknown>): string { const timestamp = new Date().toISOString(); const contextStr = context ? ` ${JSON.stringify(context)}` : ''; return `[${timestamp}] [${level}] ${message}${contextStr}`; } // Use stderr for logging to avoid interfering with MCP protocol private log(level: string, message: string, context?: Record<string, unknown>): void { // Write to stderr to avoid interfering with MCP protocol on stdout process.stderr.write(this.formatMessage(level, message, context) + '\n'); } public debug(message: string, context?: Record<string, unknown>): void { if (this.level <= LogLevel.DEBUG) { this.log('DEBUG', message, context); } } public info(message: string, context?: Record<string, unknown>): void { if (this.level <= LogLevel.INFO) { this.log('INFO', message, context); } } public warn(message: string, context?: Record<string, unknown>): void { if (this.level <= LogLevel.WARN) { this.log('WARN', message, context); } } public error(message: string, error?: Error, context?: Record<string, unknown>): void { if (this.level <= LogLevel.ERROR) { const errorContext = error ? { ...context, error: error.message, stack: error.stack } : context; this.log('ERROR', message, errorContext); } } } export const logger = Logger.getInstance();