BREAKING CHANGE(core): update

This commit is contained in:
2023-11-03 13:55:56 +01:00
parent 2c904cc1ec
commit c37f62abec
4 changed files with 97 additions and 56 deletions

View File

@@ -1,56 +1,42 @@
import * as plugins from './smartstream.plugins.js';
export class StreamIntake<T> {
export class StreamIntake<T> extends plugins.stream.Readable {
private signalEndBoolean = false;
private chunkStore: T[] = [];
public pushNextObservable = new plugins.smartrx.ObservableIntake<any>();
private pushedNextDeferred = plugins.smartpromise.defer();
private readableStream = plugins.from2.obj(async (size, next) => {
constructor(options?: plugins.stream.ReadableOptions) {
super({ ...options, objectMode: true }); // Ensure that we are in object mode.
this.pushNextObservable.push('please push next');
}
_read(size: number): void {
// console.log('get next');
// execute without backpressure
while (this.chunkStore.length > 0) {
next(null, this.chunkStore.shift());
}
if (this.signalEndBoolean) {
next(null, null);
}
const pushChunk = (): void => {
if (this.chunkStore.length > 0) {
// If push returns false, then we should stop reading
if (!this.push(this.chunkStore.shift())) {
return;
}
}
// lets trigger backpressure handling
this.pushNextObservable.push('please push next');
await this.pushedNextDeferred.promise;
this.pushedNextDeferred = plugins.smartpromise.defer();
if (this.chunkStore.length === 0) {
if (this.signalEndBoolean) {
// If we're done, push null to signal the end of the stream
this.push(null);
} else {
// Ask for more data and wait
this.pushNextObservable.push('please push next');
this.pushedNextDeferred.promise.then(() => {
this.pushedNextDeferred = plugins.smartpromise.defer(); // Reset the deferred
pushChunk(); // Try pushing the next chunk
});
}
}
};
// execute with backpressure
while (this.chunkStore.length > 0) {
next(null, this.chunkStore.shift());
}
if (this.signalEndBoolean) {
next(null, null);
}
});
constructor() {
this.pushNextObservable.push('please push next');
}
/**
* returns a new style readble stream
*/
public getReadable() {
const readable = new plugins.stream.Readable({
objectMode: true,
});
return readable.wrap(this.readableStream);
}
/**
* returns an oldstyle readble stream
*/
public getReadableStream() {
return this.readableStream;
pushChunk();
}
public pushData(chunkData: T) {