helper.js

var fs = require("fs");

const args = process.argv;
let data_type = args[2];
create_upload_file(data_type);

function create_upload_file(datatype_string) {
  let input_filename = "./5e-SRD-" + datatype_string + ".json";
  console.log(input_filename);
  let index_and_urlify = (err, data) => {
    data = JSON.parse(data);

    let keys = Object.keys(data);

    // number the indexes and change the URLs
    for (let i = 0; i < data.length; i++) {
      data[i].index = i + 1;
      if (data_type !== "levels") {
        data[i].url =
          "http://www.dnd5eapi.co/api/" +
          datatype_string +
          "/" +
          (i + 1).toString();
      }
    }

    let output_filename = "./upload-5e-SRD-" + datatype_string + ".json";

    fs.writeFile(output_filename, JSON.stringify(data), err => {
      if (err) throw err;
      console.log("Success");
      console.log(
        "mongoimport -h ds133158.mlab.com:33158 -d 5e-srd-api -c " +
          datatype_string +
          " -u admin -p password --file upload-5e-SRD-" +
          datatype_string +
          ".json --jsonArray"
      );
    });
  };

  fs.readFile(input_filename, "utf8", (err, data) => {
    return index_and_urlify(err, data);
  });
}
function create_all_upload_files() {
  for (let i = 0; i < all_data_types.length; i++) {
    create_upload_file(all_data_types[i]);
  }
}

// mongoimport -h ds133158.mlab.com:33158 -d 5e-srd-api -c classfeatures -u admin -p password --file upload-5e-SRD-classfeatures.json --jsonArray