Count classes in HTML files using Node

count-classes.js

'use strict';

const fs = require('fs');
const path = require('path');

console.log('🛠  Scanning HTML files...');

const files = getAllFiles('./', ['.html']);
const classCount = countClasses(files);

console.log(`classes:`, classCount);

console.log(`found ${Object.keys(classCount).length} unique classes in ${files.length} files`);

function getAllFiles(initialPath, fileExtensions) {
    var fullPaths = [];
    var files = fs.readdirSync(initialPath);

    files.forEach((file) => {
      var joinedPath = path.join(initialPath, file);

      if (fs.lstatSync(joinedPath).isDirectory()) {
          fullPaths = fullPaths.concat(getAllFiles(joinedPath, fileExtensions));
      } else {
          fileExtensions.forEach((fileExtension) => {
              if (file.indexOf(fileExtension) >= 0 || fileExtension == null) {
                  fullPaths.push(joinedPath);
              }
          });
      }
    });

    return fullPaths;
};

function countClasses(files) {
    const classCount = {};

    for (let index in files) {
        if (files.hasOwnProperty(index)) {
            const file = files[index];
            const htmlString = fs.readFileSync(file, 'utf8');
            const htmlClassRe = RegExp('class="[a-z\-\ ]*"','gi');
            const allClasses = [];

            console.log(`finding classes in ${file}`);
            const matches = htmlString.matchAll(htmlClassRe);

            for (const match of matches) {
                let newMatches = match[0].replace(/class="/g, '').replace(/"/g, '').trim().split(' ');

                for (const newMatch of newMatches) {
                    allClasses.push(newMatch);
                }
            }

            allClasses.forEach(className => {
                classCount[className] = (classCount[className] || 0) + 1;
            });
        }
    };

    // Sort and return
    return Object.entries(classCount).sort(([,a],[,b]) => b-a).reduce((r, [k, v]) => ({ ...r, [k]: v }), {});;
};