mirror of https://github.com/BTCPrivate/copay.git
105 lines
2.4 KiB
JavaScript
105 lines
2.4 KiB
JavaScript
var config = require('../config');
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var _ = require('underscore');
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/**
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* @desc
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* A simple logger that wraps the <tt>console.log</tt> methods when available.
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*
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* Usage:
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* <pre>
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* log = new Logger('copay');
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* log.setLevel('info');
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* log.debug('Message!'); // won't show
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* log.setLevel('debug');
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* log.debug('Message!', 1); // will show '[debug] copay: Message!, 1'
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* </pre>
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*
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* @param {string} name - a name for the logger. This will show up on every log call
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* @constructor
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*/
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var Logger = function(name) {
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this.name = name || 'log';
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this.level = 2;
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};
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var levels = {
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'debug': 0,
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'info': 1,
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'log': 2,
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'warn': 3,
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'error': 4,
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'fatal': 5
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};
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_.each(levels, function(level, levelName) {
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Logger.prototype[levelName] = function() {
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if (level >= levels[this.level]) {
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var str = '[' + levelName + '] ' + this.name + ': ' + arguments[0],
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extraArgs,
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extraArgs = [].slice.call(arguments, 1);
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if (console[levelName]) {
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extraArgs.unshift(str);
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console[levelName].apply(console, extraArgs);
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} else {
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if (extraArgs.length) {
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str += JSON.stringify(extraArgs);
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}
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console.log(str);
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}
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}
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};
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});
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/**
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* @desc
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* Sets the level of a logger. A level can be any bewteen: 'debug', 'info', 'log',
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* 'warn', 'error', and 'fatal'. That order matters: if a logger's level is set to
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* 'warn', calling <tt>level.debug</tt> won't have any effect.
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*
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* @param {number} level - the name of the logging level
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*/
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Logger.prototype.setLevel = function(level) {
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this.level = level;
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};
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/**
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* @class Logger
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* @method debug
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* @desc Log messages at the debug level.
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* @param {*} args - the arguments to be logged.
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*/
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/**
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* @class Logger
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* @method info
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* @desc Log messages at the info level.
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* @param {*} args - the arguments to be logged.
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*/
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/**
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* @class Logger
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* @method log
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* @desc Log messages at an intermediary level called 'log'.
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* @param {*} args - the arguments to be logged.
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*/
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/**
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* @class Logger
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* @method warn
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* @desc Log messages at the warn level.
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* @param {*} args - the arguments to be logged.
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*/
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/**
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* @class Logger
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* @method error
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* @desc Log messages at the error level.
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* @param {*} args - the arguments to be logged.
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*/
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/**
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* @class Logger
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* @method fatal
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* @desc Log messages at the fatal level.
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* @param {*} args - the arguments to be logged.
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*/
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var logger = new Logger('copay');
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logger.setLevel(config.logLevel);
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module.exports = logger;
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