updateIconsForAccessibility

const fs = require('fs');
const path = require('path');
const iconDirectory = path.join(__dirname, '/shared/partials/icons/');
const singleFile = path.join(__dirname, '/shared/partials/icons/36px/pinterest-gallery-overlay.hbs');

function walkSync(dir, filelist) {
  const files = fs.readdirSync(dir);
  filelist = filelist || [];
  files.forEach(function (file) {
    if (fs.statSync(dir + file).isDirectory()) {
      filelist = walkSync(dir + file + '/', filelist);
    }
    else {
      filelist.push(dir + file);
    }
  });
  return filelist;
}

function updateIconFile(file) {
  // Return new promise
  return new Promise((resolve, reject) => {
    // Do async job
    fs.readFile(file, 'utf8', (err, data) => {
      if (err) {
        reject(err);
      }

      // Update the content.
      const matches = data.match(/<svg[^>]+>/);

      if (matches) {
        const svgTag = matches[0];
        const startTag = svgTag.slice(0, -1);
        const newSvgTag = `${startTag} role="img" {{#if aria-label}}aria-label="{{aria-label}}"{{else}}aria-hidden="true"{{/if}} tabindex="-1">`;
        const content = data.replace(svgTag, newSvgTag);

        fs.writeFile(file, content, (err) => {
          if (err) {
            resolve({
              filename: file,
              status: false,
              content: err,
            });
          }
          else {
            resolve({
              filename: file,
              status: true,
              content,
            });
          }
        });
      }
      else {
        resolve({
          filename: file,
          status: false,
          content: 'No svg found.',
        });
      }
    });
  });
}

const fileList = [];
walkSync(iconDirectory, fileList);
const readList = [];

fileList.forEach((file) => {
  readList.push(updateIconFile(file));
});

Promise.all(readList).then((values) => {
  values.forEach((value) => {
    if (value.status) {
      // write to file
    }
    else {
      console.log(value);
    }
  });
});

// Promise.all([updateIconFile(singleFile)]).then((values) => {
//   console.log(values);
// });