80 lines
2.8 KiB
JavaScript
80 lines
2.8 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.PonyfillTransformStream = void 0;
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const node_stream_1 = require("node:stream");
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const ReadableStream_js_1 = require("./ReadableStream.js");
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const utils_js_1 = require("./utils.js");
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const WritableStream_js_1 = require("./WritableStream.js");
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class PonyfillTransformStream {
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transform;
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writable;
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readable;
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constructor(transformer) {
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if (transformer instanceof node_stream_1.Transform) {
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this.transform = transformer;
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}
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else if (transformer) {
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const controller = {
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enqueue(chunk) {
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transform.push(chunk);
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},
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error(reason) {
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transform.destroy(reason);
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},
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terminate() {
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(0, utils_js_1.endStream)(transform);
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},
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get desiredSize() {
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return transform.writableLength;
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},
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};
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const transform = new node_stream_1.Transform({
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read() { },
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write(chunk, _encoding, callback) {
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try {
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const result = transformer.transform?.(chunk, controller);
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if (result instanceof Promise) {
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result.then(() => {
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callback();
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}, err => {
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callback(err);
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});
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}
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else {
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callback();
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}
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}
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catch (err) {
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callback(err);
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}
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},
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final(callback) {
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try {
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const result = transformer.flush?.(controller);
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if (result instanceof Promise) {
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result.then(() => {
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callback();
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}, err => {
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callback(err);
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});
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}
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else {
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callback();
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}
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}
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catch (err) {
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callback(err);
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}
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},
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});
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this.transform = transform;
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}
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else {
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this.transform = new node_stream_1.Transform();
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}
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this.writable = new WritableStream_js_1.PonyfillWritableStream(this.transform);
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this.readable = new ReadableStream_js_1.PonyfillReadableStream(this.transform);
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}
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}
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exports.PonyfillTransformStream = PonyfillTransformStream;
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