100 lines
3.0 KiB
JavaScript
100 lines
3.0 KiB
JavaScript
import { isElement } from './utils/core.js';
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const LEVELS = {
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'debug': 0,
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'info': 1,
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'warn': 2,
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'error': 3,
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'fatal': 4
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}
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/* eslint-disable @typescript-eslint/no-empty-function */
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const logger = Object.assign({
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'debug': console?.log ? console.log.bind(console) : function noop () {},
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'error': console?.log ? console.log.bind(console) : function noop () {},
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'info': console?.log ? console.log.bind(console) : function noop () {},
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'warn': console?.log ? console.log.bind(console) : function noop () {}
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}, console);
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/* eslint-enable @typescript-eslint/no-empty-function */
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/**
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* The log namespace
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* @namespace log
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*/
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const log = {
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/**
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* The the log-level, which determines how verbose the logging is.
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* @method log#setLogLevel
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* @param { number } level - The loglevel which allows for filtering of log messages
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*/
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setLogLevel (level) {
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if (!['debug', 'info', 'warn', 'error', 'fatal'].includes(level)) {
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throw new Error(`Invalid loglevel: ${level}`);
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}
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this.loglevel = level;
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},
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/**
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* Logs messages to the browser's developer console.
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* Available loglevels are 0 for 'debug', 1 for 'info', 2 for 'warn',
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* 3 for 'error' and 4 for 'fatal'.
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* When using the 'error' or 'warn' loglevels, a full stacktrace will be
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* logged as well.
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* @method log#log
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* @param { string | Error } message - The message to be logged
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* @param { number } level - The loglevel which allows for filtering of log messages
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*/
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log (message, level, style='') {
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if (LEVELS[level] < LEVELS[this.loglevel]) {
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return;
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}
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if (level === 'error' || level === 'fatal') {
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style = style || 'color: maroon';
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} else if (level === 'debug') {
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style = style || 'color: green';
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}
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if (message instanceof Error) {
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message = message.stack;
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} else if (isElement(message)) {
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message = message.outerHTML;
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}
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const prefix = style ? '%c' : '';
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if (level === 'error') {
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logger.error(`${prefix} ERROR: ${message}`, style);
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} else if (level === 'warn') {
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logger.warn(`${prefix} ${(new Date()).toISOString()} WARNING: ${message}`, style);
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} else if (level === 'fatal') {
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logger.error(`${prefix} FATAL: ${message}`, style);
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} else if (level === 'debug') {
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logger.debug(`${prefix} ${(new Date()).toISOString()} DEBUG: ${message}`, style);
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} else {
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logger.info(`${prefix} ${(new Date()).toISOString()} INFO: ${message}`, style);
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}
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},
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debug (message, style) {
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this.log(message, 'debug', style);
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},
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error (message, style) {
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this.log(message, 'error', style);
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},
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info (message, style) {
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this.log(message, 'info', style);
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},
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warn (message, style) {
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this.log(message, 'warn', style);
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},
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fatal (message, style) {
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this.log(message, 'fatal', style);
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}
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}
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export default log;
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