memorium/lib/log.ts

enum LOG_LEVEL {
  DEBUG,
  INFO,
  WARN,
  ERROR,
}
let longestScope = 0;
let logLevel = LOG_LEVEL.WARN;

export function setLogLevel(level: LOG_LEVEL) {
  logLevel = level;
}

const getPrefix = (scope: string) => `[${scope.padEnd(longestScope, " ")}]`;

type LoggerOptions = {
  enabled?: boolean;
};

export function createLogger(scope: string, _options?: LoggerOptions) {
  longestScope = Math.max(scope.length, longestScope);

  function debug(...data: unknown[]) {
    if (logLevel !== LOG_LEVEL.DEBUG) return;
    console.debug(getPrefix(scope), ...data);
  }

  function info(...data: unknown[]) {
    if (logLevel !== LOG_LEVEL.DEBUG && logLevel !== LOG_LEVEL.INFO) return;
    console.info(getPrefix(scope), ...data);
  }

  function warn(...data: unknown[]) {
    if (
      logLevel !== LOG_LEVEL.DEBUG && logLevel !== LOG_LEVEL.INFO &&
      logLevel !== LOG_LEVEL.WARN
    ) return;
    console.warn(getPrefix(scope), ...data);
  }

  function error(...data: unknown[]) {
    console.error(getPrefix(scope), ...data);
  }

  return {
    debug,
    info,
    error,
    warn,
  };
}