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238 lines
7.3 KiB
TypeScript
238 lines
7.3 KiB
TypeScript
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// TODO reenable this code when we enable writableStreams and transport types
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// // Forked from https://github.com/stardazed/sd-streams/tree/8928cf04b035fd02fb1340b7eb541c76be37e546
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// // Copyright (c) 2018-Present by Arthur Langereis - @zenmumbler MIT
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// /**
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// * streams/pipe-to - pipeTo algorithm implementation
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// * Part of Stardazed
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// * (c) 2018-Present by Arthur Langereis - @zenmumbler
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// * https://github.com/stardazed/sd-streams
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// */
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// /* eslint-disable @typescript-eslint/no-explicit-any */
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// // TODO reenable this lint here
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// import * as rs from "./readable-internals.ts";
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// import * as ws from "./writable-internals.ts";
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// import * as shared from "./shared-internals.ts";
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// import { ReadableStreamDefaultReader } from "./readable-stream-default-reader.ts";
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// import { WritableStreamDefaultWriter } from "./writable-stream-default-writer.ts";
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// import { PipeOptions } from "../dom_types.ts";
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// import { DenoError, ErrorKind } from "../errors.ts";
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// // add a wrapper to handle falsy rejections
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// interface ErrorWrapper {
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// actualError: shared.ErrorResult;
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// }
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// export function pipeTo<ChunkType>(
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// source: rs.SDReadableStream<ChunkType>,
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// dest: ws.WritableStream<ChunkType>,
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// options: PipeOptions
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// ): Promise<void> {
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// const preventClose = !!options.preventClose;
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// const preventAbort = !!options.preventAbort;
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// const preventCancel = !!options.preventCancel;
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// const signal = options.signal;
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// let shuttingDown = false;
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// let latestWrite = Promise.resolve();
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// const promise = shared.createControlledPromise<void>();
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// // If IsReadableByteStreamController(this.[[readableStreamController]]) is true, let reader be either ! AcquireReadableStreamBYOBReader(this) or ! AcquireReadableStreamDefaultReader(this), at the user agent’s discretion.
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// // Otherwise, let reader be ! AcquireReadableStreamDefaultReader(this).
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// const reader = new ReadableStreamDefaultReader(source);
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// const writer = new WritableStreamDefaultWriter(dest);
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// let abortAlgorithm: () => any;
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// if (signal !== undefined) {
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// abortAlgorithm = (): void => {
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// // TODO this should be a DOMException,
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// // https://github.com/stardazed/sd-streams/blob/master/packages/streams/src/pipe-to.ts#L38
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// const error = new DenoError(ErrorKind.AbortError, "Aborted");
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// const actions: Array<() => Promise<void>> = [];
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// if (preventAbort === false) {
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// actions.push(() => {
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// if (dest[shared.state_] === "writable") {
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// return ws.writableStreamAbort(dest, error);
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// }
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// return Promise.resolve();
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// });
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// }
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// if (preventCancel === false) {
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// actions.push(() => {
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// if (source[shared.state_] === "readable") {
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// return rs.readableStreamCancel(source, error);
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// }
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// return Promise.resolve();
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// });
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// }
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// shutDown(
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// () => {
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// return Promise.all(actions.map(a => a())).then(_ => undefined);
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// },
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// { actualError: error }
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// );
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// };
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// if (signal.aborted === true) {
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// abortAlgorithm();
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// } else {
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// signal.addEventListener("abort", abortAlgorithm);
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// }
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// }
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// function onStreamErrored(
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// stream: rs.SDReadableStream<ChunkType> | ws.WritableStream<ChunkType>,
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// promise: Promise<void>,
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// action: (error: shared.ErrorResult) => void
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// ): void {
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// if (stream[shared.state_] === "errored") {
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// action(stream[shared.storedError_]);
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// } else {
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// promise.catch(action);
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// }
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// }
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// function onStreamClosed(
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// stream: rs.SDReadableStream<ChunkType> | ws.WritableStream<ChunkType>,
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// promise: Promise<void>,
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// action: () => void
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// ): void {
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// if (stream[shared.state_] === "closed") {
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// action();
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// } else {
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// promise.then(action);
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// }
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// }
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// onStreamErrored(source, reader[rs.closedPromise_].promise, error => {
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// if (!preventAbort) {
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// shutDown(() => ws.writableStreamAbort(dest, error), {
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// actualError: error
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// });
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// } else {
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// shutDown(undefined, { actualError: error });
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// }
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// });
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// onStreamErrored(dest, writer[ws.closedPromise_].promise, error => {
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// if (!preventCancel) {
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// shutDown(() => rs.readableStreamCancel(source, error), {
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// actualError: error
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// });
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// } else {
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// shutDown(undefined, { actualError: error });
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// }
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// });
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// onStreamClosed(source, reader[rs.closedPromise_].promise, () => {
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// if (!preventClose) {
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// shutDown(() =>
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// ws.writableStreamDefaultWriterCloseWithErrorPropagation(writer)
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// );
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// } else {
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// shutDown();
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// }
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// });
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// if (
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// ws.writableStreamCloseQueuedOrInFlight(dest) ||
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// dest[shared.state_] === "closed"
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// ) {
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// // Assert: no chunks have been read or written.
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// const destClosed = new TypeError();
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// if (!preventCancel) {
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// shutDown(() => rs.readableStreamCancel(source, destClosed), {
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// actualError: destClosed
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// });
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// } else {
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// shutDown(undefined, { actualError: destClosed });
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// }
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// }
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// function awaitLatestWrite(): Promise<void> {
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// const curLatestWrite = latestWrite;
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// return latestWrite.then(() =>
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// curLatestWrite === latestWrite ? undefined : awaitLatestWrite()
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// );
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// }
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// function flushRemainder(): Promise<void> | undefined {
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// if (
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// dest[shared.state_] === "writable" &&
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// !ws.writableStreamCloseQueuedOrInFlight(dest)
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// ) {
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// return awaitLatestWrite();
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// } else {
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// return undefined;
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// }
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// }
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// function shutDown(action?: () => Promise<void>, error?: ErrorWrapper): void {
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// if (shuttingDown) {
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// return;
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// }
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// shuttingDown = true;
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// if (action === undefined) {
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// action = (): Promise<void> => Promise.resolve();
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// }
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// function finishShutDown(): void {
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// action!().then(
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// _ => finalize(error),
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// newError => finalize({ actualError: newError })
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// );
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// }
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// const flushWait = flushRemainder();
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// if (flushWait) {
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// flushWait.then(finishShutDown);
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// } else {
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// finishShutDown();
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// }
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// }
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// function finalize(error?: ErrorWrapper): void {
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// ws.writableStreamDefaultWriterRelease(writer);
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// rs.readableStreamReaderGenericRelease(reader);
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// if (signal && abortAlgorithm) {
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// signal.removeEventListener("abort", abortAlgorithm);
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// }
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// if (error) {
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// promise.reject(error.actualError);
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// } else {
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// promise.resolve(undefined);
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// }
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// }
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// function next(): Promise<void> | undefined {
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// if (shuttingDown) {
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// return;
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// }
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// writer[ws.readyPromise_].promise.then(() => {
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// rs.readableStreamDefaultReaderRead(reader).then(
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// ({ value, done }) => {
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// if (done) {
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// return;
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// }
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// latestWrite = ws
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// .writableStreamDefaultWriterWrite(writer, value!)
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// .catch(() => {});
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// next();
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// },
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// _error => {
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// latestWrite = Promise.resolve();
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// }
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// );
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// });
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// }
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// next();
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// return promise.promise;
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// }
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