openapi-condense.js

const fs = require('fs');
const { join } = require('path');
const _ = require('lodash');

function getAllDirectoriesNested(path, allDirectories) {
  allDirectories = allDirectories || [];

  let directories = fs.readdirSync(path)
    .filter(file => {
      return fs.statSync(join(path, file)).isDirectory();
    })
    .map(file => join(path, file));

  directories.forEach(directory => {
    allDirectories.push(directory);
    getAllDirectoriesNested('./' + directory + '/', allDirectories);
  });

  return allDirectories;
}

function getAllFiles(path) {
  return fs.readdirSync(path).filter(file => {
    return fs.statSync(join(path, file)).isFile()
      && !['package.json', 'package-lock.json'].includes(file)
      && file.substr(file.length - 5) === '.json';
  });
}

function process(path, obj, isInitial) {
  obj = obj || {};
  isInitial = isInitial || false;

  // For the Open API `paths` object, we want to be able to organize the folders in a nested structure, but insert
  // the paths back into the object in a single property per path (e.g., "users/{userId}")
  let directories = [];
  if (path.substr(path.length - 6) === 'paths/') {
    directories = getAllDirectoriesNested(path).map(directory => directory.replace('paths/', ''));
  } else if (path.indexOf('paths/') === -1) {
    directories = fs.readdirSync(path).filter(file => {
      return fs.statSync(join(path, file)).isDirectory() && !['node_modules', 'dist'].includes(file);
    });
  }

  let files = isInitial ? [] : getAllFiles(path);

  files.forEach(file => {
    let json_contents = JSON.parse(fs.readFileSync(path + file));
    obj[file.substr(0, file.length - 5)] = json_contents;
  });

  directories.forEach(directory => {
    let prefix = (path === './paths/') ? '/' : '';
    let result = process(path + directory + '/');
    if (!_.isEmpty(result)) {
      obj[prefix + directory] = result;
    }
  });

  return obj;
}

let openapiJson = JSON.parse(fs.readFileSync('./openapi.json'));
openapiJson = process('./', openapiJson, true);
fs.writeFile('./dist/openapi.json', JSON.stringify(openapiJson), () => {
  console.log('Open API file generated!');
});