Start reimplementation in typescript

src/vm/input.ts

@@ -0,0 +1,35 @@
+import * as readline from 'node:readline'
+import {BehaviorSubject} from "../util/subject.js";
+import {Lifecycle, LifecycleAware} from "../util/lifecycle.js";
+
+export class Input extends BehaviorSubject<string> implements LifecycleAware {
+	private rl?: readline.Interface
+
+	public setupPrompt(): void {
+		if ( this.rl ) {
+			this.closePrompt()
+		}
+
+		this.rl = readline.createInterface({
+			input: process.stdin,
+			output: process.stdout,
+			prompt: 'str %> ',
+		})
+
+		this.rl.prompt()
+
+		this.rl.on('line', async (line) => {
+			await this.next(line + '\n')
+			this.rl?.prompt(true)
+		})
+	}
+
+	public closePrompt(): void {
+		this.rl?.close()
+		this.rl = undefined
+	}
+
+	adoptLifecycle(lifecycle: Lifecycle): void {
+		lifecycle.onClose(() => this.closePrompt())
+	}
+}