index.js

import axios from 'axios';
import * as cheerio from 'cheerio';
import chalk from 'chalk';
import { program } from 'commander';

// Configure CLI
// Configura la CLI
program
    .version('1.0.0')
    .description('Simple SEO Analyzer Tool / Semplice Tool di Analisi SEO')
    .argument('<url>', 'URL to analyze / URL da analizzare')
    .action(async (url) => {
        await analyzeSEO(url);
    });

program.parse(process.argv);

async function analyzeSEO(targetUrl) {
    // Ensure URL has protocol
    if (!targetUrl.startsWith('http')) {
        targetUrl = 'https://' + targetUrl;
    }

    console.log(chalk.cyan(`\nFetching ${targetUrl}...`));

    try {
        const { data } = await axios.get(targetUrl, {
            headers: {
                'User-Agent': 'Mozilla/5.0 (compatible; NodeSEOAnalyzer/1.0)'
            }
        });

        const $ = cheerio.load(data);
        console.log(chalk.green('Successfully fetched page.\n'));

        // --- Title Analysis ---
        console.log(chalk.bold('--- Title Analysis ---'));
        const title = $('title').text().trim();
        if (title) {
            console.log(`Title: ${title}`);
            console.log(`Length: ${title.length} characters`);
            if (title.length >= 30 && title.length <= 60) {
                console.log(chalk.green('✔ Length is optimal (30-60 chars).'));
            } else {
                console.log(chalk.yellow('⚠ Length could be improved (optimal: 30-60 chars).'));
            }
        } else {
            console.log(chalk.red('✘ No title tag found!'));
        }

        // --- Meta Description Analysis ---
        console.log(chalk.bold('\n--- Meta Description Analysis ---'));
        const metaDesc = $('meta[name="description"]').attr('content');
        if (metaDesc) {
            console.log(`Description: ${metaDesc.trim()}`);
            console.log(`Length: ${metaDesc.length} characters`);
            if (metaDesc.length >= 120 && metaDesc.length <= 160) {
                console.log(chalk.green('✔ Length is optimal (120-160 chars).'));
            } else {
                console.log(chalk.yellow('⚠ Length could be improved (optimal: 120-160 chars).'));
            }
        } else {
            console.log(chalk.red('✘ No meta description found!'));
        }

        // --- Heading Analysis ---
        console.log(chalk.bold('\n--- Heading Analysis ---'));
        const h1Count = $('h1').length;
        console.log(`Found ${h1Count} H1 tag(s).`);
        if (h1Count === 1) {
            console.log(chalk.green('✔ Perfect! Only one H1 tag found.'));
            console.log(`Content: ${$('h1').first().text().trim()}`);
        } else if (h1Count === 0) {
            console.log(chalk.red('✘ No H1 tag found. This is bad for SEO.'));
        } else {
            console.log(chalk.yellow('⚠ Multiple H1 tags found. It is recommended to have only one main H1.'));
        }

        // --- Image Analysis ---
        console.log(chalk.bold('\n--- Image Analysis ---'));
        const images = $('img');
        let missingAlt = 0;
        images.each((i, img) => {
            if (!$(img).attr('alt')) {
                missingAlt++;
            }
        });

        console.log(`Total Images: ${images.length}`);
        if (missingAlt === 0) {
            console.log(chalk.green('✔ All images have ALT attributes.'));
        } else {
            console.log(chalk.red(`✘ ${missingAlt} images are missing ALT attributes.`));
        }

    } catch (error) {
        console.error(chalk.red(`Error fetching page: ${error.message}`));
    }
}