116 lines
2.9 KiB
TypeScript
116 lines
2.9 KiB
TypeScript
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import { _defaultLoggingHandler } from './platform/logging'
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let defaultLogLevel = 2
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if (typeof process !== 'undefined') {
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const envLogLevel = parseInt(process.env.MTCUTE_LOG_LEVEL!)
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if (!isNaN(envLogLevel)) {
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defaultLogLevel = envLogLevel
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}
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} else if (typeof localStorage !== 'undefined') {
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const localLogLevel = parseInt(localStorage.MTCUTE_LOG_LEVEL)
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if (!isNaN(localLogLevel)) {
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defaultLogLevel = localLogLevel
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}
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}
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const FORMATTER_RE = /%[a-zA-Z]/g
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/**
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* Logger created by {@link LogManager}
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*/
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export class Logger {
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private color: number
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constructor(readonly mgr: LogManager, readonly tag: string) {
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let hash = 0
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for (let i = 0; i < tag.length; i++) {
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hash = (hash << 5) - hash + tag.charCodeAt(i)
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hash |= 0 // convert to 32bit int
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}
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this.color = Math.abs(hash) % 6
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}
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log(level: number, fmt: string, ...args: any[]): void {
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if (level > this.mgr.level) return
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// custom formatters
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if (
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fmt.indexOf('%h') > -1 ||
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fmt.indexOf('%b') > -1 ||
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fmt.indexOf('%j') > -1
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) {
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let idx = 0
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fmt = fmt.replace(FORMATTER_RE, (m) => {
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if (m === '%h' || m === '%b' || m === '%j') {
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const val = args[idx]
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args.splice(idx, 1)
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if (m === '%h') return val.toString('hex')
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if (m === '%b') return !!val + ''
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if (m === '%j') return JSON.stringify(val)
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}
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idx++
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return m
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})
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}
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this.mgr.handler(this.color, level, this.tag, fmt, args)
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}
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readonly error = this.log.bind(this, LogManager.ERROR)
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readonly warn = this.log.bind(this, LogManager.WARN)
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readonly info = this.log.bind(this, LogManager.INFO)
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readonly debug = this.log.bind(this, LogManager.DEBUG)
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readonly request = this.log.bind(this, LogManager.REQUEST)
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/**
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* Create a {@link Logger} with the given tag
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* from the same {@link LogManager} as the current
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* Logger.
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*
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* @param tag Logger tag
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*/
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create(tag: string): Logger {
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return this.mgr.create(tag)
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}
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}
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/**
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* Log manager.
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*
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* Does nothing by itself, but allows managing instance logs
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*/
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export class LogManager {
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static OFF = 0
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static ERROR = 1
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static WARN = 2
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static INFO = 3
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static DEBUG = 4
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static REQUEST = 5
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private _cache: Record<string, Logger> = {}
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level = defaultLogLevel
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handler = _defaultLoggingHandler
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disable(): void {
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this.level = 0
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}
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/**
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* Create a {@link Logger} with the given tag
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*
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* @param tag Logger tag
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*/
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create(tag: string): Logger {
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if (!(tag in this._cache)) {
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this._cache[tag] = new Logger(this, tag)
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}
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return this._cache[tag]
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}
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}
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