dad-tool/dad/utils/createSlimJson.js

Dummy Address Data (DAD) - Retrieve real addresses from all around the world.

import { promises } from 'fs';

// A helper utility to build slim lists from a larger data set. Data source: https://batch.openaddresses.io/data
// You may be required to wrap the JSON in an addresses wrapper on the dataSet you want to use. eg: {"addresses":[{ ... }
// Additionally, you may be required to add commas after each JSON address object
// Usage: DATA_SET="path/to/dataset.json" STATE="UT" COUNTRY="US" node util/create-slim-json.js

export async function createSlimJson() {
  const numberOfAddresses = process.env.NUM_ADDRESSES || 100; // How many items should be pulled from the larger data set for this slim list
  const dataSetFilePath = process.env.DATA_SET; // The path to a JSON data set you want to build a slim list from
  const outputPath = `${dataSetFilePath}-slim.json`;
  const state = process.env.STATE || '';
  const country = process.env.COUNTRY || '';
  let finalList = [];

  if (!dataSetFilePath) {
    throw new Error('DATA_SET env variable must be set. Please correct and try again.');
  }

  try {
    for (let i = 0; i < numberOfAddresses; i++) {
      const fileContent = await promises.readFile(dataSetFilePath, 'utf-8');
      const dataSetFile = JSON.parse(fileContent).addresses;
      let randomAddress = dataSetFile[Math.floor(Math.random() * dataSetFile.length)]['properties'];
      let addressObject = {
        street1: `${randomAddress['number']} ${randomAddress['street']}`,
        street2: randomAddress['unit'],
        city: randomAddress['city'],
        state: state,
        zip: randomAddress['postcode'],
        country: country,
      };
      finalList.push(addressObject);
    }
    await promises.writeFile(outputPath, JSON.stringify(finalList) + '\n');
    console.log(
      `Addresses slimmed and saved to ${outputPath}. Place the new list in its corresponding country folder and rename as needed.`
    );
    return true;
  } catch (error) {
    throw Error(error);
  }
}

createSlimJson().catch(console.log);