climate-plots-config/preset.js

const fs = require('fs');
const merge = require('merge');
const normalizedPath = require('path').join(__dirname, 'preset');

exports.preset = new Promise((resolve, reject) => {
  fs.readdir(normalizedPath, (err, files) => {
    Promise.all(files.filter((name) => name.includes('.json'))
      .map((file) => {
        try {
          let json = require(`./preset/${file}`);
          if (file === 'full.json') {
            json = {
              all: Object.keys(json),
            };
          } else {
            json[file.replace('.json', '')] = Object.keys(json);
          }
          return json;
        } catch (ERROR) {
          console.log(ERROR);
          throw ERROR;
        }
      })).then((res) => {
      resolve(res.reduce((x, y) => merge(x, y)));
    });
  });
});