42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
import Stream from 'stream'
|
|
import * as CBOR from "cbor-x";
|
|
import * as CSVDecode from "csv-parse";
|
|
import * as CSVEncode from "csv-stringify";
|
|
|
|
export const cborDecode = () => new CBOR.DecoderStream({useRecords: false, allowHalfOpen: true});
|
|
export const cborEncode = () => new CBOR.EncoderStream({useRecords: false, allowHalfOpen: true});
|
|
|
|
export const cborDecodeSync = a => () => CBOR.decodeMultiple(a);
|
|
export const cborEncodeSync = a => () => CBOR.encode(a, {useRecords: false});
|
|
|
|
export const csvDecode = () => CSVDecode.parse({columns: true, allowHalfOpen: true})
|
|
export const csvEncode = () => CSVEncode.stringify({header: true, allowHalfOpen: true})
|
|
|
|
export const discardTransform = () => new Stream.Transform({
|
|
transform: function(_ck, _enc, cb) {
|
|
cb()
|
|
},
|
|
objectMode: true
|
|
})
|
|
|
|
export const slowTransform = () => {
|
|
return new Stream.Transform({
|
|
transform: function(ck, _enc, cb) {
|
|
this.push(ck)
|
|
setTimeout(() => cb(), 4)
|
|
},
|
|
objectMode: true
|
|
})
|
|
}
|
|
|
|
export const charsTransform = () => new Stream.Transform({
|
|
transform: function(ck, _enc, cb) {
|
|
ck.split('').filter(s => !!s).forEach(s => this.push(s))
|
|
cb()
|
|
},
|
|
objectMode: true,
|
|
})
|
|
|
|
/** @type {(a: Array<unknown>) => Stream.Readable}*/
|
|
export const readableFromArray = a => Stream.Readable.from(a)
|