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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** * Use this to retrieve the numeric log level by it's associated name. * Defaults to INFO. */export const LogLevels = {  NOTSET: 0,  DEBUG: 10,  INFO: 20,  WARN: 30,  ERROR: 40,  CRITICAL: 50,} as const;
/** Union of valid log levels */export type LogLevel = typeof LogLevels[LevelName];
/** Union of valid log level names */export type LevelName = Exclude<keyof typeof LogLevels, number>;
/** Permitted log level names */export const LogLevelNames: LevelName[] = Object.keys(LogLevels).filter((key) =>  isNaN(Number(key))) as LevelName[];
const byLevel: Record<LogLevel, LevelName> = {  [LogLevels.NOTSET]: "NOTSET",  [LogLevels.DEBUG]: "DEBUG",  [LogLevels.INFO]: "INFO",  [LogLevels.WARN]: "WARN",  [LogLevels.ERROR]: "ERROR",  [LogLevels.CRITICAL]: "CRITICAL",};
/** * Returns the numeric log level associated with the passed, * stringy log level name. */export function getLevelByName(name: LevelName): LogLevel {  const level = LogLevels[name];  if (level !== undefined) {    return level;  }  throw new Error(`no log level found for name: ${name}`);}
/** Returns the stringy log level name provided the numeric log level. */export function getLevelName(level: LogLevel): LevelName {  const levelName = byLevel[level as LogLevel];  if (levelName) {    return levelName;  }  throw new Error(`no level name found for level: ${level}`);}