askeroo/dist/examples/stream-example.js

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

import { ask, note, stream } from "../src/index.js";
async function simulateNpmInstall() {
    const output = await stream({
        maxLines: 15,
        showLineNumbers: false,
    });
    // Simulate npm install output
    const packages = [
        "lodash@4.17.21",
        "axios@1.5.0",
        "chalk@5.3.0",
        "commander@11.0.0",
        "inquirer@9.2.11",
    ];
    await output.writeLine("npm WARN deprecated inflight@1.0.6");
    await new Promise((r) => setTimeout(r, 200));
    for (const pkg of packages) {
        await output.writeLine(`added ${pkg}`);
        await new Promise((r) => setTimeout(r, 300));
    }
    await output.writeLine("");
    await output.writeLine(`added ${packages.length} packages in 2.5s`);
    await output.writeLine("");
    await output.writeLine("15 packages are looking for funding");
    await output.writeLine("  run `npm fund` for details");
    await output.complete("Installation complete!");
}
async function simulateBuildProcess() {
    const output = await stream("Building project...", {
        maxLines: 20,
        prefixSymbol: "│",
    });
    await output.writeLine("Cleaning output directory...");
    await new Promise((r) => setTimeout(r, 300));
    await output.writeLine("Compiling TypeScript...");
    await new Promise((r) => setTimeout(r, 200));
    await output.writeLine("  ✓ src/index.ts");
    await new Promise((r) => setTimeout(r, 100));
    await output.writeLine("  ✓ src/utils.ts");
    await new Promise((r) => setTimeout(r, 100));
    await output.writeLine("  ✓ src/types.ts");
    await new Promise((r) => setTimeout(r, 100));
    await output.writeLine("  ✓ src/components/App.tsx");
    await new Promise((r) => setTimeout(r, 200));
    await output.writeLine("Bundling assets...");
    await new Promise((r) => setTimeout(r, 300));
    await output.writeLine("  ✓ styles.css (12.5 KB)");
    await new Promise((r) => setTimeout(r, 200));
    await output.writeLine("  ✓ images optimized (3 files)");
    await new Promise((r) => setTimeout(r, 300));
    await output.writeLine("Running tests...");
    await new Promise((r) => setTimeout(r, 500));
    await output.writeLine("  ✓ 15 tests passed");
    await output.complete("✓ Build completed successfully!");
}
async function streamWithLineNumbers() {
    const output = await stream("Server logs", {
        maxLines: 10,
        showLineNumbers: true,
        prefixSymbol: "▸",
    });
    // Simulate many log entries - only last 10 will be visible
    for (let i = 1; i <= 25; i++) {
        await output.writeLine(`[${new Date().toISOString()}] Request ${i} processed`);
        await new Promise((r) => setTimeout(r, 150));
    }
    await output.complete("Server stopped");
}
async function streamWithProgressUpdates() {
    const output = await stream("Processing files...");
    const files = ["config.json", "data.csv", "image.png", "document.pdf"];
    for (let i = 0; i < files.length; i++) {
        await output.setLabel(`Processing files... (${i + 1}/${files.length})`);
        await output.writeLine(`Starting ${files[i]}...`);
        await new Promise((r) => setTimeout(r, 500));
        await output.writeLine(`✓ ${files[i]} complete`);
        await new Promise((r) => setTimeout(r, 200));
    }
    await output.complete("All files processed!");
}
async function streamWithError() {
    const output = await stream("Running tests...");
    await output.writeLine("Starting test suite...");
    await new Promise((r) => setTimeout(r, 300));
    await output.writeLine("✓ test/auth.test.ts (5 passed)");
    await new Promise((r) => setTimeout(r, 300));
    await output.writeLine("✓ test/api.test.ts (8 passed)");
    await new Promise((r) => setTimeout(r, 300));
    await output.writeLine("✗ test/database.test.ts (2 passed, 1 failed)");
    await new Promise((r) => setTimeout(r, 200));
    await output.writeLine("");
    await output.writeLine("  FAIL test/database.test.ts");
    await output.writeLine("    ● Database › should connect");
    await output.writeLine("      Connection timeout after 5000ms");
    await output.error("Test suite failed!");
}
// Run examples
const flow = async () => {
    await note("\n=== NPM Install Simulation ===\n");
    await simulateNpmInstall();
    await note("\n\n=== Build Process ===\n");
    await simulateBuildProcess();
    await note("\n\n=== Streaming Logs with Line Numbers (only last 10 shown) ===\n");
    await streamWithLineNumbers();
    await note("\n\n=== Progress Updates ===\n");
    await streamWithProgressUpdates();
    await note("\n\n=== Error Example ===\n");
    await streamWithError();
    return "All examples completed!";
};
(async () => {
    try {
        const result = await ask(flow);
        console.log("\n" + result);
    }
    catch (error) {
        console.error("Error:", error);
        process.exit(1);
    }
})();
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