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const { Readable } = require('stream');
class TextStream extends Readable {
constructor(text, options = {}) {
super(options);
this.text = text;
this.currentIndex = 0;
this.delay = options.delay || 20; // Time in milliseconds
}
_read() {
const minChunkSize = 2;
const maxChunkSize = 4;
const { delay } = this;
if (this.currentIndex < this.text.length) {
setTimeout(() => {
const remainingChars = this.text.length - this.currentIndex;
const chunkSize = Math.min(this.randomInt(minChunkSize, maxChunkSize + 1), remainingChars);
const chunk = this.text.slice(this.currentIndex, this.currentIndex + chunkSize);
this.push(chunk);
this.currentIndex += chunkSize;
}, delay);
} else {
this.push(null); // signal end of data
}
}
randomInt(min, max) {
return Math.floor(Math.random() * (max - min)) + min;
}
async processTextStream(onProgressCallback) {
const streamPromise = new Promise((resolve, reject) => {
this.on('data', (chunk) => {
onProgressCallback(chunk.toString());
});
this.on('end', () => {
console.log('Stream ended');
resolve();
});
this.on('error', (err) => {
reject(err);
});
});
try {
await streamPromise;
} catch (err) {
console.error('Error processing text stream:', err);
// Handle the error appropriately, e.g., return an error message or throw an error
}
}
}
module.exports = TextStream;
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