const { readdirSync } = require('fs');

const getDirectories = source =>
    readdirSync(source, { withFileTypes: true })
        .filter(dirent => dirent.isDirectory())
        .map(dirent => dirent.name);

const dirs = getDirectories(__dirname);

for (const dir of dirs) {
    fs.renameSync(`${dir}/SVG/${dir}_regular.png`, `${dir}/icon_regular.png`);
    fs.renameSync(`${dir}/SVG/${dir}_filled.png`, `${dir}/icon_filled.png`);
    fs.rmdirSync(`${dir}/SVG`);
}