Compile all mjml files to html files

compile-mjml.js

const mjml = require('mjml');
const { readFile, writeFile } = require('fs');
const glob = require('glob');
const { promisify } = require('util');
const chalk = require('chalk');

const readFileAsync = promisify(readFile);
const writeFileAsync = promisify(writeFile);
const globAsync = promisify(glob);
const log = {
  // eslint-disable-next-line no-console
  error: err => console.error(chalk.red(err)),
  // eslint-disable-next-line no-console
  success: err => console.log(chalk.green(err)),
};

const main = async () => {
  const filePaths = await globAsync('emails/**/*.mjml');

  const htmlFiles = await Promise.all(
    filePaths.map(async path => {
      try {
        return {
          path,
          content: await readFileAsync(path, 'utf8').then(
            content => mjml(content).html,
          ),
        };
      } catch (error) {
        log.error(`Error parsing file: ${path}: ${error}`);
        return { path, content: undefined };
      }
    }),
  );

  const result = await Promise.all(
    htmlFiles
      .filter(({ content }) => content)
      .map(async ({ path, content }) => {
        const htmlPath = path.replace('.mjml', '.html');

        await writeFileAsync(htmlPath, content, 'utf8');
      }),
  );

  log.success(
    `- ${result.length} of ${filePaths.length} file(s) parsed with success.`,
  );
  log.error(
    `- ${htmlFiles.filter(({ content }) => !content).length} of ${
      filePaths.length
    } file(s) could not be parsed.`,
  );
};

main();