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59 lines
1.5 KiB
TypeScript
59 lines
1.5 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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/** Get log level numeric values through enum constants
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*/
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export enum LogLevels {
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NOTSET = 0,
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DEBUG = 10,
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INFO = 20,
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WARNING = 30,
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ERROR = 40,
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CRITICAL = 50,
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}
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/** Permitted log level names */
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export const LogLevelNames = Object.keys(LogLevels).filter((key) =>
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isNaN(Number(key))
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);
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/** Union of valid log level strings */
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export type LevelName = keyof typeof LogLevels;
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const byLevel: Record<string, LevelName> = {
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[String(LogLevels.NOTSET)]: "NOTSET",
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[String(LogLevels.DEBUG)]: "DEBUG",
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[String(LogLevels.INFO)]: "INFO",
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[String(LogLevels.WARNING)]: "WARNING",
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[String(LogLevels.ERROR)]: "ERROR",
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[String(LogLevels.CRITICAL)]: "CRITICAL",
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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): number {
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switch (name) {
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case "NOTSET":
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return LogLevels.NOTSET;
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case "DEBUG":
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return LogLevels.DEBUG;
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case "INFO":
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return LogLevels.INFO;
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case "WARNING":
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return LogLevels.WARNING;
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case "ERROR":
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return LogLevels.ERROR;
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case "CRITICAL":
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return LogLevels.CRITICAL;
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default:
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throw new Error(`no log level found for "${name}"`);
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}
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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: number): LevelName {
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const levelName = byLevel[level];
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if (levelName) {
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return levelName;
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}
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throw new Error(`no level name found for level: ${level}`);
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}
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