type LogLevel = 'debug' | 'info' | 'warn' | 'error' | 'fatal';
const levels: Record<LogLevel, number> = { debug: 0, info: 1, warn: 2, error: 3, fatal: 4 };
const currentLevel = (process.env.LOG_LEVEL || 'info') as LogLevel;
const shouldLog = (level: LogLevel): boolean => levels[level] >= (levels[currentLevel] ?? levels.info);
const timestamp = (): string => {
const now = new Date();
const h = now.getHours().toString().padStart(2, '0');
const m = now.getMinutes().toString().padStart(2, '0');
const s = now.getSeconds().toString().padStart(2, '0');
const ms = now.getMilliseconds().toString().padStart(3, '0');
return `[${h}:${m}:${s}.${ms}]`;
};
export const logger = {
debug: (data: Record<string, unknown>, msg: string) => {
if (shouldLog('debug')) console.debug(`${timestamp()} [DEBUG] ${msg}`, data);
},
info: (msg: string) => {
if (shouldLog('info')) console.info(`${timestamp()} ${msg}`);
},
warn: (data: Record<string, unknown>, msg: string) => {
if (shouldLog('warn')) console.warn(`${timestamp()} [WARN] ${msg}`, data);
},
error: (data: Record<string, unknown>, msg: string) => {
if (shouldLog('error')) console.error(`${timestamp()} [ERROR] ${msg}`, data);
},
fatal: (msgOrData: string | Record<string, unknown>, msg?: string) => {
if (shouldLog('fatal')) {
if (typeof msgOrData === 'string') {
console.error(`${timestamp()} [FATAL] ${msgOrData}`);
} else {
console.error(`${timestamp()} [FATAL] ${msg}`, msgOrData);
}
}
},
};
