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log.js
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var DEBUG = 0;
var INFO = 1;
var WARN = 2;
var ERROR = 3;
var levelStrings = ["DEBUG", " INFO", " WARN", "ERROR"];
var globalLevel = INFO;
function ensure2(num) {
if (num < 10) {
return "0" + num;
}
return "" + num;
}
function ensure3(num) {
if (num < 10) {
return "00" + num;
}
if (num < 100) {
return "0" + num;
}
return "" + num;
}
function formatDate(date) {
var year_str = "" + date.getFullYear();
var month_str = ensure2(date.getMonth() + 1);
var day_str = ensure2(date.getDate());
var hour_str = ensure2(date.getHours());
var min_str = ensure2(date.getMinutes());
var sec_str = ensure2(date.getSeconds());
var msec_str = ensure3(date.getMilliseconds());
return year_str + "-" + month_str + "-" + day_str + " " + hour_str + ":" + min_str + ":" + sec_str + "." + msec_str;
}
function log(level, msg) {
if (level < globalLevel) {
return;
}
var date = formatDate(new Date());
var level_str = levelStrings[level];
console.log(date + " " + level_str + " " + msg);
}
function debug(msg) {
log(DEBUG, msg);
}
function info(msg) {
log(INFO, msg);
}
function warn(msg) {
log(WARN, msg);
}
function error(msg) {
log(ERROR, msg);
}
exports.globalLevel = globalLevel;
exports.DEBUG = DEBUG;
exports.INFO = INFO;
exports.WARN = WARN;
exports.ERROR = ERROR;
exports.log = log;
exports.debug = debug;
exports.info = info;
exports.warn = warn;
exports.error = error;