/
logger.js
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/
logger.js
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'use strict';
var fs = require('fs')
var path = require('path')
var tracer = require('tracer')
var colors = require('colors')
var dateFormat = require('dateformat')
var _ = require('underscore')
_.templateSettings = {
interpolate : /\{\{(.+?)\}\}/g
}
var debug = process.argv.some(function(arg) {
return arg === '--verbose'
})
var levels = ['LOG', 'TRACE', 'DEBUG', 'INFO', 'WARN', 'ERROR']
var level = 'INFO'
if (debug) {
level = 'DEBUG'
}
var conf = {
root : 'logs',
logPathFormat : '{{root}}/{{date}}.log'
}
function LogFile(date) {
this.date = date;
this.path = _.template(conf.logPathFormat, {root:conf.root, date:date})
if (!fs.existsSync(path.dirname(this.path))) {
fs.mkdirSync(path.dirname(this.path))
}
this.stream = fs.createWriteStream(this.path, {
flags: 'a',
encoding: 'utf8'
})
}
LogFile.prototype.write = function(str) {
this.stream.write(str + '\n');
}
LogFile.prototype.destroy = function() {
if (this.stream) {
this.stream.end()
this.stream.destroySoon()
this.stream = null
}
}
var logFile
function _push2File(str) {
var now = dateFormat(new Date(), 'yyyymmdd')
if (logFile && logFile.date !== now) {
logFile.destroy()
logFile = null
}
if (!logFile) {
logFile = new LogFile(now)
}
logFile.write(str)
}
var errorFormat
if (debug) {
errorFormat = '{{message}} (in {{file}}:{{line}})\nCall Stack:{{stacklist}}'
} else {
errorFormat = '{{message}} (in {{file}}:{{line}})'
}
var logger = tracer.colorConsole({
level: 'log',
format: [
'[{{title}}] {{message}} (in {{file}}:{{line}})', //default format
{
error : errorFormat
}
],
preprocess: function(data) {
if (data.title === 'error') {
var callstack = '', len = data.stack.length
for (var i = 0; i < len; i++) {
callstack += '\n' + data.stack[i]
}
data.stacklist = callstack
}
},
filters: [{
trace : colors.magenta,
info : colors.green,
warn : colors.yellow,
error : [colors.red]
}],
transport: function(data) {
var title = data.title.toUpperCase()
if (levels.indexOf(title) >= levels.indexOf(level)) {
console.log(data.output)
}
if (logger.push2File) {
_push2File(getMsg(title, data))
}
if (title === 'ERROR') {
process.exit(0)
}
}
})
function getMsg(title, data) {
var msg = getPrefix(title, data) + ' | '
if (title !== 'ERROR') {
return msg + data.message
} else {
return msg + '[' + data.stack.split('\n').join(',') + ']'
}
}
function getPrefix(title, data) {
var msg = padding(title, 5) + ' ' + dateFormat(new Date(), 'yyyy-mm-dd hh:MM:ss') +
' ' + data.file + ':' + data.line
return padding(msg, 40)
}
function padding(msg, num) {
msg = msg.split('')
for (var i = msg.length, len = num; i < len; i++) {
msg.push(' ')
}
return msg.join('')
}
logger.push2File = !/totoro$/.test(process.argv[1])
module.exports = logger