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lib: move kEnumerableProperty to internal/util
PR-URL: nodejs#41877 Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,162 @@ | ||
| 'use strict'; | ||
|
|
||
| const { | ||
| ObjectDefineProperties, | ||
| Symbol, | ||
| } = primordials; | ||
|
|
||
| const { | ||
| codes: { | ||
| ERR_INVALID_ARG_VALUE, | ||
| ERR_INVALID_THIS, | ||
| }, | ||
| } = require('internal/errors'); | ||
|
|
||
| const { | ||
| newReadableWritablePairFromDuplex, | ||
| } = require('internal/webstreams/adapters'); | ||
|
|
||
| const { customInspect } = require('internal/webstreams/util'); | ||
|
|
||
| const { | ||
| customInspectSymbol: kInspect, | ||
| kEnumerableProperty, | ||
| } = require('internal/util'); | ||
|
|
||
| let zlib; | ||
| function lazyZlib() { | ||
| zlib ??= require('zlib'); | ||
| return zlib; | ||
| } | ||
|
|
||
| const kHandle = Symbol('kHandle'); | ||
| const kTransform = Symbol('kTransform'); | ||
| const kType = Symbol('kType'); | ||
|
|
||
| /** | ||
| * @typedef {import('./readablestream').ReadableStream} ReadableStream | ||
| * @typedef {import('./writablestream').WritableStream} WritableStream | ||
| */ | ||
|
|
||
| function isCompressionStream(value) { | ||
| return typeof value?.[kHandle] === 'object' && | ||
| value?.[kType] === 'CompressionStream'; | ||
| } | ||
|
|
||
| function isDecompressionStream(value) { | ||
| return typeof value?.[kHandle] === 'object' && | ||
| value?.[kType] === 'DecompressionStream'; | ||
| } | ||
|
|
||
| class CompressionStream { | ||
| /** | ||
| * @param {'deflate'|'gzip'} format | ||
| */ | ||
| constructor(format) { | ||
| this[kType] = 'CompressionStream'; | ||
| switch (format) { | ||
| case 'deflate': | ||
| this[kHandle] = lazyZlib().createDeflate(); | ||
| break; | ||
| case 'gzip': | ||
| this[kHandle] = lazyZlib().createGzip(); | ||
| break; | ||
| default: | ||
| throw new ERR_INVALID_ARG_VALUE('format', format); | ||
| } | ||
| this[kTransform] = newReadableWritablePairFromDuplex(this[kHandle]); | ||
| } | ||
|
|
||
| /** | ||
| * @readonly | ||
| * @type {ReadableStream} | ||
| */ | ||
| get readable() { | ||
| if (!isCompressionStream(this)) | ||
| throw new ERR_INVALID_THIS('CompressionStream'); | ||
| return this[kTransform].readable; | ||
| } | ||
|
|
||
| /** | ||
| * @readonly | ||
| * @type {WritableStream} | ||
| */ | ||
| get writable() { | ||
| if (!isCompressionStream(this)) | ||
| throw new ERR_INVALID_THIS('CompressionStream'); | ||
| return this[kTransform].writable; | ||
| } | ||
|
|
||
| [kInspect](depth, options) { | ||
| if (!isCompressionStream(this)) | ||
| throw new ERR_INVALID_THIS('CompressionStream'); | ||
| customInspect(depth, options, 'CompressionStream', { | ||
| readable: this[kTransform].readable, | ||
| writable: this[kTransform].writable, | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| class DecompressionStream { | ||
| /** | ||
| * @param {'deflate'|'gzip'} format | ||
| */ | ||
| constructor(format) { | ||
| this[kType] = 'DecompressionStream'; | ||
| switch (format) { | ||
| case 'deflate': | ||
| this[kHandle] = lazyZlib().createInflate(); | ||
| break; | ||
| case 'gzip': | ||
| this[kHandle] = lazyZlib().createGunzip(); | ||
| break; | ||
| default: | ||
| throw new ERR_INVALID_ARG_VALUE('format', format); | ||
| } | ||
| this[kTransform] = newReadableWritablePairFromDuplex(this[kHandle]); | ||
| } | ||
|
|
||
| /** | ||
| * @readonly | ||
| * @type {ReadableStream} | ||
| */ | ||
| get readable() { | ||
| if (!isDecompressionStream(this)) | ||
| throw new ERR_INVALID_THIS('DecompressionStream'); | ||
| return this[kTransform].readable; | ||
| } | ||
|
|
||
| /** | ||
| * @readonly | ||
| * @type {WritableStream} | ||
| */ | ||
| get writable() { | ||
| if (!isDecompressionStream(this)) | ||
| throw new ERR_INVALID_THIS('DecompressionStream'); | ||
| return this[kTransform].writable; | ||
| } | ||
|
|
||
| [kInspect](depth, options) { | ||
| if (!isDecompressionStream(this)) | ||
| throw new ERR_INVALID_THIS('DecompressionStream'); | ||
| customInspect(depth, options, 'DecompressionStream', { | ||
| readable: this[kTransform].readable, | ||
| writable: this[kTransform].writable, | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| ObjectDefineProperties(CompressionStream.prototype, { | ||
| readable: kEnumerableProperty, | ||
| writable: kEnumerableProperty, | ||
| }); | ||
|
|
||
| ObjectDefineProperties(DecompressionStream.prototype, { | ||
| readable: kEnumerableProperty, | ||
| writable: kEnumerableProperty, | ||
| }); | ||
|
|
||
| module.exports = { | ||
| CompressionStream, | ||
| DecompressionStream, | ||
| }; |
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