This app provides monitoring and information features for the common freifunk user and the technical stuff of a freifunk community.
Code base is taken from a TUM Practical Course project and added here to see if Freifunk Altdorf can use it.
https://www.freifunk-altdorf.de
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251 lines
6.6 KiB
251 lines
6.6 KiB
'use strict' |
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var Progress = require('are-we-there-yet') |
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var Gauge = require('gauge') |
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var EE = require('events').EventEmitter |
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var log = exports = module.exports = new EE |
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var util = require('util') |
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var ansi = require('ansi') |
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log.cursor = ansi(process.stderr) |
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log.stream = process.stderr |
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// by default, let ansi decide based on tty-ness. |
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var colorEnabled = undefined |
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log.enableColor = function () { |
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colorEnabled = true |
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this.cursor.enabled = true |
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} |
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log.disableColor = function () { |
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colorEnabled = false |
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this.cursor.enabled = false |
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} |
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// default level |
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log.level = 'info' |
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log.gauge = new Gauge(log.cursor) |
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log.tracker = new Progress.TrackerGroup() |
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// no progress bars unless asked |
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log.progressEnabled = false |
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var gaugeTheme = undefined |
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log.enableUnicode = function () { |
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gaugeTheme = Gauge.unicode |
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log.gauge.setTheme(gaugeTheme) |
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} |
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log.disableUnicode = function () { |
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gaugeTheme = Gauge.ascii |
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log.gauge.setTheme(gaugeTheme) |
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} |
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var gaugeTemplate = undefined |
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log.setGaugeTemplate = function (template) { |
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gaugeTemplate = template |
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log.gauge.setTemplate(gaugeTemplate) |
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} |
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log.enableProgress = function () { |
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if (this.progressEnabled) return |
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this.progressEnabled = true |
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if (this._pause) return |
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this.tracker.on('change', this.showProgress) |
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this.gauge.enable() |
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this.showProgress() |
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} |
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log.disableProgress = function () { |
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if (!this.progressEnabled) return |
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this.clearProgress() |
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this.progressEnabled = false |
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this.tracker.removeListener('change', this.showProgress) |
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this.gauge.disable() |
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} |
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var trackerConstructors = ['newGroup', 'newItem', 'newStream'] |
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var mixinLog = function (tracker) { |
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// mixin the public methods from log into the tracker |
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// (except: conflicts and one's we handle specially) |
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Object.keys(log).forEach(function (P) { |
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if (P[0] === '_') return |
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if (trackerConstructors.filter(function (C) { return C === P }).length) return |
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if (tracker[P]) return |
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if (typeof log[P] !== 'function') return |
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var func = log[P] |
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tracker[P] = function () { |
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return func.apply(log, arguments) |
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} |
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}) |
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// if the new tracker is a group, make sure any subtrackers get |
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// mixed in too |
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if (tracker instanceof Progress.TrackerGroup) { |
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trackerConstructors.forEach(function (C) { |
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var func = tracker[C] |
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tracker[C] = function () { return mixinLog(func.apply(tracker, arguments)) } |
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}) |
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} |
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return tracker |
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} |
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// Add tracker constructors to the top level log object |
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trackerConstructors.forEach(function (C) { |
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log[C] = function () { return mixinLog(this.tracker[C].apply(this.tracker, arguments)) } |
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}) |
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log.clearProgress = function () { |
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if (!this.progressEnabled) return |
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this.gauge.hide() |
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} |
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log.showProgress = function (name, completed) { |
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if (!this.progressEnabled) return |
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if (completed == null) completed = this.tracker.completed() |
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this.gauge.show(name, completed) |
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}.bind(log) // bind for use in tracker's on-change listener |
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// temporarily stop emitting, but don't drop |
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log.pause = function () { |
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this._paused = true |
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} |
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log.resume = function () { |
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if (!this._paused) return |
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this._paused = false |
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var b = this._buffer |
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this._buffer = [] |
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b.forEach(function (m) { |
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this.emitLog(m) |
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}, this) |
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if (this.progressEnabled) this.enableProgress() |
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} |
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log._buffer = [] |
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var id = 0 |
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log.record = [] |
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log.maxRecordSize = 10000 |
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log.log = function (lvl, prefix, message) { |
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var l = this.levels[lvl] |
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if (l === undefined) { |
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return this.emit('error', new Error(util.format( |
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'Undefined log level: %j', lvl))) |
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} |
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var a = new Array(arguments.length - 2) |
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var stack = null |
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for (var i = 2; i < arguments.length; i ++) { |
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var arg = a[i-2] = arguments[i] |
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// resolve stack traces to a plain string. |
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if (typeof arg === 'object' && arg && |
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(arg instanceof Error) && arg.stack) { |
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arg.stack = stack = arg.stack + '' |
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} |
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} |
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if (stack) a.unshift(stack + '\n') |
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message = util.format.apply(util, a) |
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var m = { id: id++, |
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level: lvl, |
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prefix: String(prefix || ''), |
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message: message, |
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messageRaw: a } |
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this.emit('log', m) |
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this.emit('log.' + lvl, m) |
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if (m.prefix) this.emit(m.prefix, m) |
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this.record.push(m) |
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var mrs = this.maxRecordSize |
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var n = this.record.length - mrs |
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if (n > mrs / 10) { |
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var newSize = Math.floor(mrs * 0.9) |
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this.record = this.record.slice(-1 * newSize) |
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} |
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this.emitLog(m) |
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}.bind(log) |
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log.emitLog = function (m) { |
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if (this._paused) { |
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this._buffer.push(m) |
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return |
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} |
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if (this.progressEnabled) this.gauge.pulse(m.prefix) |
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var l = this.levels[m.level] |
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if (l === undefined) return |
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if (l < this.levels[this.level]) return |
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if (l > 0 && !isFinite(l)) return |
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var style = log.style[m.level] |
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var disp = log.disp[m.level] || m.level |
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this.clearProgress() |
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m.message.split(/\r?\n/).forEach(function (line) { |
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if (this.heading) { |
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this.write(this.heading, this.headingStyle) |
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this.write(' ') |
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} |
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this.write(disp, log.style[m.level]) |
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var p = m.prefix || '' |
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if (p) this.write(' ') |
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this.write(p, this.prefixStyle) |
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this.write(' ' + line + '\n') |
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}, this) |
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this.showProgress() |
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} |
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log.write = function (msg, style) { |
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if (!this.cursor) return |
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if (this.stream !== this.cursor.stream) { |
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this.cursor = ansi(this.stream, { enabled: colorEnabled }) |
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var options = {} |
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if (gaugeTheme != null) options.theme = gaugeTheme |
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if (gaugeTemplate != null) options.template = gaugeTemplate |
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this.gauge = new Gauge(options, this.cursor) |
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} |
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style = style || {} |
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if (style.fg) this.cursor.fg[style.fg]() |
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if (style.bg) this.cursor.bg[style.bg]() |
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if (style.bold) this.cursor.bold() |
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if (style.underline) this.cursor.underline() |
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if (style.inverse) this.cursor.inverse() |
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if (style.beep) this.cursor.beep() |
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this.cursor.write(msg).reset() |
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} |
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log.addLevel = function (lvl, n, style, disp) { |
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if (!disp) disp = lvl |
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this.levels[lvl] = n |
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this.style[lvl] = style |
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if (!this[lvl]) this[lvl] = function () { |
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var a = new Array(arguments.length + 1) |
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a[0] = lvl |
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for (var i = 0; i < arguments.length; i ++) { |
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a[i + 1] = arguments[i] |
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} |
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return this.log.apply(this, a) |
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}.bind(this) |
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this.disp[lvl] = disp |
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} |
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log.prefixStyle = { fg: 'magenta' } |
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log.headingStyle = { fg: 'white', bg: 'black' } |
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log.style = {} |
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log.levels = {} |
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log.disp = {} |
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log.addLevel('silly', -Infinity, { inverse: true }, 'sill') |
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log.addLevel('verbose', 1000, { fg: 'blue', bg: 'black' }, 'verb') |
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log.addLevel('info', 2000, { fg: 'green' }) |
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log.addLevel('http', 3000, { fg: 'green', bg: 'black' }) |
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log.addLevel('warn', 4000, { fg: 'black', bg: 'yellow' }, 'WARN') |
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log.addLevel('error', 5000, { fg: 'red', bg: 'black' }, 'ERR!') |
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log.addLevel('silent', Infinity) |
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// allow 'error' prefix |
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log.on('error', function(){})
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