@push.rocks/smartstream
Version:
A library to simplify the creation and manipulation of Node.js streams, providing utilities for handling transform, duplex, and readable/writable streams effectively in TypeScript.
48 lines • 3.84 kB
JavaScript
import * as plugins from './smartstream.plugins.js';
import { Duplex } from 'stream';
export class SmartStream extends Duplex {
constructor(options) {
super(options);
}
_read(size) {
// Implement if you need custom behavior, otherwise leave it empty
}
_write(chunk, encoding, callback) {
// Implement if you need custom behavior
callback();
}
static fromBuffer(buffer, options) {
const smartStream = new SmartStream(options);
process.nextTick(() => {
smartStream.push(buffer);
smartStream.push(null); // Signal the end of the data
});
return smartStream;
}
static fromObservable(observable, options) {
const smartStream = new SmartStream(options);
smartStream.observableSubscription = observable.subscribe({
next: (data) => {
if (!smartStream.push(data)) {
// Pause the observable if the stream buffer is full
smartStream.observableSubscription?.unsubscribe();
smartStream.once('drain', () => {
// Resume the observable when the stream buffer is drained
smartStream.observableSubscription?.unsubscribe();
smartStream.observableSubscription = observable.subscribe(data => {
smartStream.push(data);
});
});
}
},
error: (err) => {
smartStream.emit('error', err);
},
complete: () => {
smartStream.push(null); // Signal the end of the data
}
});
return smartStream;
}
}
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