const fs = require('fs');

// Change this line to your template
const templateFile = './example-template.json';
const cfn = JSON.parse(fs.readFileSync(templateFile));
const resources = cfn.Resources;
const keys = Object.keys(resources);

let obj = {};

for (resource in resources) {
  const type = resources[resource]['Type'].split('::')[2];

  if (obj.hasOwnProperty(type)) {
    obj[type].push(resource);
  } else {
    obj[type] = [resource];
  }
}

const outputFile = './report.txt';

fs.writeFileSync(outputFile, '');
const print = data => {
  fs.appendFileSync(outputFile, `${data}\n`);
  console.log(data);
};

for (item in obj) {
  print(`${item}: ${obj[item].length}`);
  obj[item].forEach(i => {
    print(`\t${i}`);
  });
}