logger.ts•1.89 kB
/**
* Logging utility for Notion MCP Server
*/
type LogLevel = 'debug' | 'info' | 'warn' | 'error';
interface LogMessage {
level: LogLevel;
message: string;
timestamp: string;
context?: Record<string, any>;
}
export class Logger {
private static instance: Logger;
private logLevel: LogLevel = 'info';
private constructor() {}
public static getInstance(): Logger {
if (!Logger.instance) {
Logger.instance = new Logger();
}
return Logger.instance;
}
public setLogLevel(level: LogLevel): void {
this.logLevel = level;
}
private isLevelEnabled(level: LogLevel): boolean {
const levels: Record<LogLevel, number> = {
debug: 0,
info: 1,
warn: 2,
error: 3,
};
return levels[level] >= levels[this.logLevel];
}
private formatLog(
level: LogLevel,
message: string,
context?: Record<string, any>,
): string {
const logMsg: LogMessage = {
level,
message,
timestamp: new Date().toISOString(),
context,
};
return JSON.stringify(logMsg);
}
public debug(message: string, context?: Record<string, any>): void {
if (this.isLevelEnabled('debug')) {
console.debug(this.formatLog('debug', message, context));
}
}
public info(message: string, context?: Record<string, any>): void {
if (this.isLevelEnabled('info')) {
console.info(this.formatLog('info', message, context));
}
}
public warn(message: string, context?: Record<string, any>): void {
if (this.isLevelEnabled('warn')) {
console.warn(this.formatLog('warn', message, context));
}
}
public error(message: string, context?: Record<string, any>): void {
if (this.isLevelEnabled('error')) {
console.error(this.formatLog('error', message, context));
}
}
}
// Export singleton instance
export const logger = Logger.getInstance();