ElevenLabs MCP Backend

/** * Structured logging utility * Logs request IDs, method names, tool names, and order IDs * Safely handles errors without exposing secrets */ interface LogContext { requestId?: string; method?: string; toolName?: string; orderId?: string; [key: string]: unknown; } class Logger { private generateRequestId(): string { return `${Date.now()}-${Math.random().toString(36).substring(2, 9)}`; } private formatMessage(level: string, message: string, context?: LogContext): string { const timestamp = new Date().toISOString(); const contextStr = context ? ` ${JSON.stringify(context)}` : ""; return `[${timestamp}] [${level}] ${message}${contextStr}`; } info(message: string, context?: LogContext): void { console.log(this.formatMessage("INFO", message, context)); } error(message: string, error?: Error | unknown, context?: LogContext): void { const errorContext = { ...context }; if (error instanceof Error) { errorContext.error = { message: error.message, name: error.name, stack: error.stack, }; } else if (error) { errorContext.error = String(error); } // Remove any potential secrets from error context if (errorContext.error && typeof errorContext.error === "object") { const errorObj = errorContext.error as Record<string, unknown>; Object.keys(errorObj).forEach((key) => { const lowerKey = key.toLowerCase(); if ( lowerKey.includes("key") || lowerKey.includes("secret") || lowerKey.includes("token") || lowerKey.includes("password") ) { errorObj[key] = "[REDACTED]"; } }); } console.error(this.formatMessage("ERROR", message, errorContext)); } warn(message: string, context?: LogContext): void { console.warn(this.formatMessage("WARN", message, context)); } debug(message: string, context?: LogContext): void { if (process.env.NODE_ENV === "development") { console.debug(this.formatMessage("DEBUG", message, context)); } } // Helper to create a request-scoped logger withContext(context: LogContext): { info: (message: string, additionalContext?: LogContext) => void; error: (message: string, error?: Error | unknown, additionalContext?: LogContext) => void; warn: (message: string, additionalContext?: LogContext) => void; debug: (message: string, additionalContext?: LogContext) => void; requestId: string; } { const requestId = context.requestId || this.generateRequestId(); return { requestId, info: (message: string, additionalContext?: LogContext) => { this.info(message, { ...context, ...additionalContext, requestId }); }, error: (message: string, error?: Error | unknown, additionalContext?: LogContext) => { this.error(message, error, { ...context, ...additionalContext, requestId }); }, warn: (message: string, additionalContext?: LogContext) => { this.warn(message, { ...context, ...additionalContext, requestId }); }, debug: (message: string, additionalContext?: LogContext) => { this.debug(message, { ...context, ...additionalContext, requestId }); }, }; } } export const logger = new Logger();