nhfs/lib/log.ts

NHFS — A sleek HTTP file server for the web built with Next.js and HeroUI. (Alpha)

type LogLevel = 'debug' | 'info' | 'warn' | 'error' | 'silent';

const LOG_LEVELS: Record<LogLevel, number> = {
  debug: 0,
  info: 1,
  warn: 2,
  error: 3,
  silent: 4,
};

const envLevel = (process.env.LOG_LEVEL ||
  (process.env.NODE_ENV === 'development' ? 'debug' : 'info')) as LogLevel;
const currentLevel = LOG_LEVELS[envLevel] ?? LOG_LEVELS.info;

const color = {
  reset: '\x1b[0m',
  dim: '\x1b[2m',
  bright: '\x1b[1m',
  red: '\x1b[31m',
  green: '\x1b[32m',
  yellow: '\x1b[33m',
  blue: '\x1b[34m',
};

function formatLabel(level: LogLevel) {
  switch (level) {
    case 'debug':
      return `${color.blue}[DEBUG] ${color.dim}${color.reset}`;
    case 'info':
      return `${color.green}[INFO] ${color.dim}${color.reset}`;
    case 'warn':
      return `${color.yellow}[WARN] ${color.dim}${color.reset}`;
    case 'error':
      return `${color.red}[ERROR] ${color.dim}${color.reset}`;
    default:
      return `${color.dim}${color.reset}`;
  }
}

export const log = {
  debug: (...args: any[]) => {
    if (currentLevel <= LOG_LEVELS.debug) {
      console.debug(formatLabel('debug'), ...args);
    }
  },
  info: (...args: any[]) => {
    if (currentLevel <= LOG_LEVELS.info) {
      console.info(formatLabel('info'), ...args);
    }
  },
  warn: (...args: any[]) => {
    if (currentLevel <= LOG_LEVELS.warn) {
      console.warn(formatLabel('warn'), ...args);
    }
  },
  error: (...args: any[]) => {
    if (currentLevel <= LOG_LEVELS.error) {
      console.error(formatLabel('error'), ...args);
    }
  },
};