81 lines
2.2 KiB
TypeScript
81 lines
2.2 KiB
TypeScript
import {Level, type Options, type Writer} from './types'
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import {get_color} from './color'
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export const writers = new Map<string, Writer>
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export let options: Options = {
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format: "[$time] $level $namespace :",
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pad_level: true,
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verbose: true,
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}
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export class Logger {
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constructor(
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private readonly _namespace: string
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) {}
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public get namespace() : string {
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return this._namespace
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}
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public extend(sub_namespace: string) : Logger {
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return new Logger(`${this.namespace}:${sub_namespace}`)
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}
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public debug(...data: any[]) : void {
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log(data, Level.DEBUG, this._namespace)
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}
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public trace(...data: any[]) : void {
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log(data, Level.TRACE, this._namespace)
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}
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public info(...data: any[]) : void {
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log(data, Level.INFO, this._namespace)
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}
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public warn(...data: any[]) : void {
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log(data, Level.WARNING, this._namespace)
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}
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public error(...data: any[]) : void {
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log(data, Level.ERROR, this._namespace)
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}
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}
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function log(message: any[], level: Level, namespace: string) : void {
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if (writers.size === 0) {
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if (options.verbose) console.log("No writer subscribed, discard message")
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return
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}
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// Format header of log
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const head = options.format
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.replace("$time", new Date().toISOString())
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.replace("$namespace", namespace)
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let lvl = get_string(level)
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if (!options.pad_level) lvl = lvl.trimEnd()
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const head_color = head.replace('$level', get_color(level)(lvl))
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const head_bw = head.replace('$level', lvl)
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for (const [name, writer] of writers.entries()) {
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const options = writer.options
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if (options?.minLevel > level) {
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if (options.verbose) console.log(`Writer's level is lower, discard message for ${name}`)
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continue
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}
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writer.log(level, options?.with_color ? head_color : head_bw, ...message)
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}
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}
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function get_string(level: Level) : string {
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switch (level) {
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case Level.DEBUG: return "DEBUG "
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case Level.TRACE: return "TRACE "
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case Level.INFO: return "INFO "
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case Level.WARNING: return "WARNING"
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case Level.ERROR: return "ERROR "
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}
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}
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