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'use strict'
var util = require('util')
var TrackerBase = require('./tracker-base.js')
var Tracker = require('./tracker.js')
var TrackerStream = require('./tracker-stream.js')
var TrackerGroup = module.exports = function (name) {
TrackerBase.call(this, name)
this.parentGroup = null
this.trackers = []
this.completion = {}
this.weight = {}
this.totalWeight = 0
this.finished = false
this.bubbleChange = bubbleChange(this)
}
util.inherits(TrackerGroup, TrackerBase)
function bubbleChange (trackerGroup) {
return function (name, completed, tracker) {
trackerGroup.completion[tracker.id] = completed
if (trackerGroup.finished) return
trackerGroup.emit('change', name || trackerGroup.name, trackerGroup.completed(), trackerGroup)
}
}
TrackerGroup.prototype.nameInTree = function () {
var names = []
var from = this
while (from) {
names.unshift(from.name)
from = from.parentGroup
}
return names.join('/')
}
TrackerGroup.prototype.addUnit = function (unit, weight) {
if (unit.addUnit) {
var toTest = this
while (toTest) {
if (unit === toTest) {
throw new Error(
'Attempted to add tracker group ' +
unit.name + ' to tree that already includes it ' +
this.nameInTree(this))
}
toTest = toTest.parentGroup
}
unit.parentGroup = this
}
this.weight[unit.id] = weight || 1
this.totalWeight += this.weight[unit.id]
this.trackers.push(unit)
this.completion[unit.id] = unit.completed()
unit.on('change', this.bubbleChange)
if (!this.finished) this.emit('change', unit.name, this.completion[unit.id], unit)
return unit
}
TrackerGroup.prototype.completed = function () {
if (this.trackers.length === 0) return 0
var valPerWeight = 1 / this.totalWeight
var completed = 0
for (var ii = 0; ii < this.trackers.length; ii++) {
var trackerId = this.trackers[ii].id
completed += valPerWeight * this.weight[trackerId] * this.completion[trackerId]
}
return completed
}
TrackerGroup.prototype.newGroup = function (name, weight) {
return this.addUnit(new TrackerGroup(name), weight)
}
TrackerGroup.prototype.newItem = function (name, todo, weight) {
return this.addUnit(new Tracker(name, todo), weight)
}
TrackerGroup.prototype.newStream = function (name, todo, weight) {
return this.addUnit(new TrackerStream(name, todo), weight)
}
TrackerGroup.prototype.finish = function () {
this.finished = true
if (!this.trackers.length) this.addUnit(new Tracker(), 1, true)
for (var ii = 0; ii < this.trackers.length; ii++) {
var tracker = this.trackers[ii]
tracker.finish()
tracker.removeListener('change', this.bubbleChange)
}
this.emit('change', this.name, 1, this)
}
var buffer = ' '
TrackerGroup.prototype.debug = function (depth) {
depth = depth || 0
var indent = depth ? buffer.substr(0, depth) : ''
var output = indent + (this.name || 'top') + ': ' + this.completed() + '\n'
this.trackers.forEach(function (tracker) {
if (tracker instanceof TrackerGroup) {
output += tracker.debug(depth + 1)
} else {
output += indent + ' ' + tracker.name + ': ' + tracker.completed() + '\n'
}
})
return output
}
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