ts-poet

import { Code, imp, def } from 'ts-poet'; import * as fs from 'node:fs/promises'; // Define an external import (e.g., from a utility library) const Observable = imp('Observable@rxjs'); const Subject = imp('Subject@rxjs'); // Generate a TypeScript class with methods and imported types const generatedCode = Code` export interface ${def('GreeterOptions')} { name: string; greetingMessage?: string; } /** * A class that greets people using RxJS Observables. */ export class ${def('Greeter')} { private readonly name: string; private readonly greetingSource = new ${Subject}<string>(); /** * Observable stream of greetings. */ public readonly greetings = this.greetingSource.asObservable(); constructor(options: ${GreeterOptions}) { this.name = options.name; if (options.greetingMessage) { this.greetingSource.next(options.greetingMessage); } } /** * Emits a personalized greeting. */ sayHello(): void { this.greetingSource.next(`Hello, ${this.name}!`); } /** * Returns an Observable that completes after a single greeting. */ greetOnce(): ${Observable}<string> { return new ${Observable}(observer => { observer.next(`One-time greeting for ${this.name}.`); observer.complete(); }); } } `; async function main() { const output = generatedCode.toString({ // Optionally configure dprint-node formatting options dprintOptions: { indentWidth: 2, lineWidth: 100 } }); console.log('--- Generated Code ---'); console.log(output); // For real-world use, save to a file await fs.writeFile('generated-greeter.ts', output); console.log('\nGenerated code written to generated-greeter.ts'); } main().catch(console.error);