146 lines
3.5 KiB
TypeScript
146 lines
3.5 KiB
TypeScript
/**
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* @author Martin Karkowski
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* @email m.karkowski@zema.de
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* @create date 2021-05-21 16:44:59
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* @modify date 2021-10-19 17:47:39
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* @desc [description]
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*/
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import { EventEmitter } from "events";
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import { getSingleton } from "../helpers/singletonMethod";
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import { getCentralNopeLogger } from "./getLogger";
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import { LoggerLevel } from "./nopeLogger";
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export type TCallback = (name: string, msg: string) => void;
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export type TCallbackWithLevel = (
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level: LoggerLevel,
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name: string,
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msg: string
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) => void;
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export class LoggerAsEventEmitter {
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constructor(protected _emitter = new EventEmitter()) {
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this._emitter = new EventEmitter();
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}
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/**
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* Register a Callback for All Log Messages
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*
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* @author M.Karkowski
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* @param {TCallbackWithLevel} callback The callback to use.
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* @memberof LoggerAsEventEmitter
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*/
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onLog(callback: TCallbackWithLevel): void {
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this._emitter.on("log", callback);
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}
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/**
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* Register a Callback for debug messages
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*
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* @author M.Karkowski
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* @param {TCallback} callback The callback to use
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* @memberof LoggerAsEventEmitter
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*/
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onDebug(callback: TCallback): void {
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this._emitter.on("log.debug", callback);
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}
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/**
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* Register a Callback for info messages
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*
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* @author M.Karkowski
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* @param {TCallback} callback The callback to use
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* @memberof LoggerAsEventEmitter
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*/
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onInfo(callback: TCallback): void {
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this._emitter.on("log.info", callback);
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}
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/**
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* Register a Callback for warn messages
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*
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* @author M.Karkowski
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* @param {TCallback} callback The callback to use
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* @memberof LoggerAsEventEmitter
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*/
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onWarn(callback: TCallback): void {
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this._emitter.on("log.warn", callback);
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}
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/**
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* Register a Callback for error messages
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*
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* @author M.Karkowski
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* @param {TCallback} callback The callback to use
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* @memberof LoggerAsEventEmitter
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*/
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onError(callback: TCallback): void {
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this._emitter.on("log.error", callback);
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}
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/**
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* Emits a logging message.
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*
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* @author M.Karkowski
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* @param {LoggerLevel} level The logging level
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* @param {string} name Name of the Logger.
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* @param {string} msg Message
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* @memberof LoggerAsEventEmitter
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*/
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emit(level: LoggerLevel, name: string, msg: string): void {
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switch (level) {
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case "debug":
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this._emitter.emit("log.debug", name, msg);
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break;
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case "info":
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this._emitter.emit("log.info", name, msg);
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break;
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case "warn":
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this._emitter.emit("log.warn", name, msg);
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break;
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case "error":
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this._emitter.emit("log.error", name, msg);
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break;
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}
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this._emitter.emit("log", level, name, msg);
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}
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}
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export function getLogerAsEventEmitter(): LoggerAsEventEmitter {
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const res = getSingleton("nope.logger.event", () => {
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return new LoggerAsEventEmitter();
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});
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return res.instance;
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}
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/**
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* Function to use a log file instead of the console log.
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*
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* @export
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*/
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export function useEventLogger(): LoggerAsEventEmitter {
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const logger = getCentralNopeLogger();
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const res = getSingleton("nope.logger.event", () => {
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return new LoggerAsEventEmitter();
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});
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const emitter = res.instance;
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logger.setHandler((msg, context) => {
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const msgs: string[] = [];
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// Change the msg to an string based Object.
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for (const key in msg) {
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msgs.push(msg[key].toString());
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}
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emitter.emit(
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context.level.name.toLowerCase(),
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context.name,
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msgs.join(" ")
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);
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});
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return emitter;
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}
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