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36 lines
963 B
36 lines
963 B
'use strict' |
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var util = require('util') |
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var stream = require('readable-stream') |
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var delegate = require('delegates') |
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var Tracker = require('./tracker.js') |
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var TrackerStream = module.exports = function (name, size, options) { |
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stream.Transform.call(this, options) |
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this.tracker = new Tracker(name, size) |
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this.name = name |
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this.id = this.tracker.id |
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this.tracker.on('change', delegateChange(this)) |
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} |
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util.inherits(TrackerStream, stream.Transform) |
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function delegateChange (trackerStream) { |
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return function (name, completion, tracker) { |
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trackerStream.emit('change', name, completion, trackerStream) |
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} |
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} |
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TrackerStream.prototype._transform = function (data, encoding, cb) { |
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this.tracker.completeWork(data.length ? data.length : 1) |
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this.push(data) |
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cb() |
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} |
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TrackerStream.prototype._flush = function (cb) { |
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this.tracker.finish() |
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cb() |
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} |
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delegate(TrackerStream.prototype, 'tracker') |
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.method('completed') |
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.method('addWork') |
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.method('finish')
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