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59 lines
1.5 KiB
TypeScript
59 lines
1.5 KiB
TypeScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// This module is browser compatible.
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/**
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* Use this to retrieve the numeric log level by it's associated name.
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* Defaults to INFO.
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*
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* @internal
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*/
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export const LogLevels = {
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NOTSET: 0,
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DEBUG: 10,
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INFO: 20,
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WARN: 30,
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ERROR: 40,
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CRITICAL: 50,
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} as const;
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/** Union of valid log levels */
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export type LogLevel = typeof LogLevels[LevelName];
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/** Union of valid log level names */
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export type LevelName = Exclude<keyof typeof LogLevels, number>;
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/** Permitted log level names */
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export const LogLevelNames: LevelName[] = Object.keys(LogLevels).filter((key) =>
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isNaN(Number(key))
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) as LevelName[];
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const byLevel: Record<LogLevel, LevelName> = {
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[LogLevels.NOTSET]: "NOTSET",
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[LogLevels.DEBUG]: "DEBUG",
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[LogLevels.INFO]: "INFO",
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[LogLevels.WARN]: "WARN",
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[LogLevels.ERROR]: "ERROR",
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[LogLevels.CRITICAL]: "CRITICAL",
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};
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/**
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* Returns the numeric log level associated with the passed,
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* stringy log level name.
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*/
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export function getLevelByName(name: LevelName): LogLevel {
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const level = LogLevels[name];
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if (level !== undefined) {
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return level;
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}
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throw new Error(`Cannot get log level: no level named ${name}`);
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}
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/** Returns the stringy log level name provided the numeric log level. */
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export function getLevelName(level: LogLevel): LevelName {
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const levelName = byLevel[level as LogLevel];
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if (levelName) {
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return levelName;
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}
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throw new Error(`Cannot get log level: no name for level: ${level}`);
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}
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