| 1 | import { Transform } from 'stream'
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| 2 | import { TransformTyped } from '../stream.model'
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| 3 |
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| 4 | /**
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| 5 | * Transforms objectMode=false Buffers/strings into objectMode=true strings.
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| 6 | *
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| 7 | * Useful in this _pipeline:
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| 8 | * fs.createReadStream(inputPath),
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| 9 | * createUnzip(), // binary
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| 10 | * transformSplit(), // string chunks, but objectMode==false
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| 11 | * transformToString(), // string chunks, but objectMode==true
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| 12 | */
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| 13 | export function transformToString(): TransformTyped<Buffer, string> {
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| 14 | return new Transform({
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| 15 | objectMode: false,
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| 16 | readableObjectMode: true,
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| 17 | transform(chunk: Buffer, _, cb) {
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| 18 | // console.log(`enc: ${_}`, chunk.toString())
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| 19 | cb(null, chunk.toString())
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| 20 | },
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| 21 | })
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| 22 | }
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