mermaid/src/logger.js

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/**
* #logger
* logger = require('logger').create()
* logger.info("blah")
* => [2011-3-3T20:24:4.810 info (5021)] blah
* logger.debug("boom")
* =>
* logger.level = Logger.levels.debug
* logger.debug(function() { return "booom" })
* => [2011-3-3T20:24:4.810 error (5021)] booom
*/
var Logger;
Logger = (function() {
function Logger(options) {
var level, num, ref;
this.options = options || {};
this.level = this.options.level || Logger.levels.default;
ref = Logger.levels;
for (level in ref) {
num = ref[level];
Logger.define(this, level);
}
}
Logger.prototype.add = function(level, message, callback) {
if (this.level > (Logger.levels[level] || 5)) {
return;
}
if (callback) {
message = callback();
} else if (typeof message === 'function') {
message = message();
}
return this.write({
timestamp: new Date,
severity: level,
message: message,
pid: process.pid
});
};
function formatTime(timestamp){
var hh = timestamp.getUTCHours();
var mm = timestamp.getUTCMinutes();
var ss = timestamp.getSeconds();
var ms = timestamp.getMilliseconds();
// If you were building a timestamp instead of a duration, you would uncomment the following line to get 12-hour (not 24) time
// if (hh > 12) {hh = hh % 12;}
// These lines ensure you have two-digits
if (hh < 10) {hh = '0'+hh;}
if (mm < 10) {mm = '0'+mm;}
if (ss < 10) {ss = '0'+ss;}
if (ms < 100){ms = '0'+ms;}
if (ms < 10) {ms = '00'+ms;}
// This formats your string to HH:MM:SS
var t = hh+':'+mm+':'+ss +' ('+ms+')';
return t;
}
Logger.prototype.write = function(options) {
if(typeof console !== 'undefined'){
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if(typeof console.log !== 'undefined'){
return console.log(this.build_message(options));
}
}
};
Logger.prototype.build_message = function(options) {
return '[' + formatTime(options.timestamp) + '] ' + options.message;
};
return Logger;
})();
Logger.define = function(logger, level) {
return logger[level] = function(message, callback) {
return this.add(level, message, callback);
};
};
Logger.levels = {
debug: 1,
info: 2,
warn: 3,
error: 4,
fatal: 5,
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default:5
};
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exports.setLogLevel = function(level){
Logger.levels.default = level;
}
exports.create = function(options) {
return new Logger(options);
};