@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 • 3.37 kB
JavaScript
import * as plugins from './smartstream.plugins.js';
export let createDuplexStream = (funcArg, endFuncArg, optionsArg = {
objectMode: false,
readableObjectMode: true,
writableObjectMode: true,
}) => {
return plugins.through2(optionsArg, function (chunk, enc, cb) {
let truncated = false;
const tools = {
truncate: () => {
truncated = true;
cb(null, null);
},
pipeMore: (pipeObject) => {
this.push(pipeObject);
},
};
const asyncWrapper = async () => {
const resultChunk = await funcArg(chunk, tools);
if (!truncated) {
cb(null, resultChunk);
}
};
asyncWrapper().catch((err) => {
console.log(err);
});
}, function (cb) {
const tools = {
truncate: () => {
cb();
},
pipeMore: (pushArg) => {
this.push(pushArg);
},
};
const asyncWrapper = async () => {
if (endFuncArg) {
const result = await endFuncArg(tools);
this.push(result);
}
cb();
};
asyncWrapper().catch((err) => {
console.log(err);
});
});
};
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