askeroo/dist/examples/oncancel-advanced.js

A modern CLI prompt library with flow control, history navigation, and conditional prompts

import { ask } from "../src/index.js";
import { text } from "../src/built-ins/text/index.js";
import { confirm } from "../src/built-ins/confirm/index.js";
import fs from "fs";
import path from "path";
async function demonstrateAdvancedOnCancel() {
    console.log("Advanced onCancel example with resource cleanup...");
    console.log("Press Ctrl+C to trigger cleanup callbacks\n");
    const tempFile = path.join(process.cwd(), "temp-session.json");
    const result = await ask(async () => {
        // Create a temporary file
        const sessionData = {
            startTime: new Date().toISOString(),
            answers: {},
        };
        fs.writeFileSync(tempFile, JSON.stringify(sessionData, null, 2));
        console.log(`📝 Created temporary file: ${tempFile}\n`);
        // Regular flow
        const projectName = await text({ label: "Project name?" });
        sessionData.answers.projectName = projectName;
        fs.writeFileSync(tempFile, JSON.stringify(sessionData, null, 2));
        const description = await text({ label: "Project description?" });
        sessionData.answers.description = description;
        fs.writeFileSync(tempFile, JSON.stringify(sessionData, null, 2));
        const confirmed = await confirm({ label: "Create this project?" });
        // Clean up temp file on successful completion
        if (fs.existsSync(tempFile)) {
            fs.unlinkSync(tempFile);
            console.log("✓ Temporary file cleaned up");
        }
        return { projectName, description, confirmed };
    }, {
        onCancel: ({ results, cleanup }) => {
            cleanup(); // Clean up UI first
            console.log("\n🚫 Advanced cancellation demo");
            console.log("📋 Collected answers:", results);
            console.log("\n🧹 Cleanup callback 1: Removing temporary file...");
            if (fs.existsSync(tempFile)) {
                fs.unlinkSync(tempFile);
                console.log("   ✓ Temporary file removed");
            }
            console.log("🔌 Cleanup callback 2: Closing connections...");
            console.log("   ✓ Connections closed");
            console.log("💾 Cleanup callback 3: Saving partial data...");
            console.log("   ✓ Partial data saved");
            process.exit(0); // User controls exit
        }
    });
    console.log("\n✅ Flow completed successfully!");
    console.log("Result:", result);
}
demonstrateAdvancedOnCancel();
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