index.js

const express = require('express');
const dogFacts = require('./dog_facts.js');


const app = express();
app.set('port', process.env.PORT || 3000);

// GET /facts endpoint
app.get('/facts', (req, res) => {
    const number = parseInt(req.query.number); //converting the query param to an int

// Check if number is provided and valid
if (isNaN(number)) {
    // Return all facts if number is not provided
    return res.json({ facts: dogFacts, success: true });
}

// Validation and print errors
if (number <= 0) {
    return res.status(400).json({ success: false, message: 'Invalid number:' });
}

// Return facts based on the number requested
const factsToSend = dogFacts.slice(0, number);

// Send response
res.json({ facts: factsToSend, success: true });
});

// 404 - Not Found route
app.use((req, res) => {
    res.type('text/plain');
    res.status(404);
    res.send("404 - Not Found");
});

// Start server
app.listen(app.get('port'), () => {
    console.log("Express Server is Running");
});