Implement edit and exit

src/vm/input.ts

@@ -1,11 +1,22 @@
 import * as readline from 'node:readline'
 import {BehaviorSubject} from "../util/subject.js";
 import {Lifecycle, LifecycleAware} from "../util/lifecycle.js";
+import {StreamLogger} from "../util/log.js";
+import {log} from "../log.js";
 
 export class Input extends BehaviorSubject<string> implements LifecycleAware {
 	private rl?: readline.Interface
+	private log: StreamLogger = log.getStreamLogger('input')
+
+	public hasPrompt(): boolean {
+		return !!this.rl
+	}
 
 	public setupPrompt(): void {
+		this.log.verbose({
+			setupPrompt: { hasExistingPrompt: !!this.rl },
+		})
+
 		if ( this.rl ) {
 			this.closePrompt()
 		}
@@ -25,6 +36,10 @@ export class Input extends BehaviorSubject<string> implements LifecycleAware {
 	}
 
 	public closePrompt(): void {
+		this.log.verbose({
+			closePrompt: { hasExistingPrompt: !!this.rl },
+		})
+
 		this.rl?.close()
 		this.rl = undefined
 	}