53 lines
1.1 KiB
JavaScript
53 lines
1.1 KiB
JavaScript
const { Readable } = require('streamx')
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module.exports = function (s, forks = 2) {
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const streams = new Array(forks)
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const status = new Array(forks).fill(true)
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let ended = false
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for (let i = 0; i < forks; i++) {
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streams[i] = new Readable({
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read (cb) {
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const check = !status[i]
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status[i] = true
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if (check && allReadable()) s.resume()
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cb(null)
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}
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})
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}
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s.on('end', function () {
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ended = true
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for (const stream of streams) stream.push(null)
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})
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s.on('error', function (err) {
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for (const stream of streams) stream.destroy(err)
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})
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s.on('close', function () {
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if (ended) return
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for (const stream of streams) stream.destroy()
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})
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s.on('data', function (data) {
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let needsPause = false
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for (let i = 0; i < streams.length; i++) {
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if (!(status[i] = streams[i].push(data))) {
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needsPause = true
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}
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}
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if (needsPause) s.pause()
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})
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return streams
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function allReadable () {
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for (let j = 0; j < status.length; j++) {
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if (!status[j]) return false
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}
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return true
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}
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}
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