zipcodes-perogi/scripts/process.js

A zipcode lookup package with the latest zipcode information updated every month.

#!/usr/bin/env node

const fs = require("fs"),
  path = require("path"),
  zips = {},
  data = fs.readFileSync("./USZipcodeAndTimezoneDataAug2019.csv", "utf8").replace(/\r/g, "").split("\n");

let str;
data.shift();


const clean = function (str) {
  return str.replace(/"/g, "").trimLeft();
};

data.forEach(function (line) {
  line = line.split(",");
  if (line.length > 1) {
    const o = {};

    o.zip = clean(line[0]);
    o.city = clean(line[1]);
    o.state = clean(line[3]);
    o.latitude = clean(line[6]);
    o.longitude = clean(line[7]);
    o.timeZoneId = clean(line[8]);

    if (!zips[o.zip]) {
      zips[o.zip] = o;
    }
  }
});

const stateMap = {};
let i;
for (i in zips) {
  const item = zips[i];
  stateMap[item.state] = stateMap[item.state] || [];

  stateMap[item.state].push(item.zip);
}

str = "exports.codes = " + JSON.stringify(zips) + ";\n";
str += "exports.stateMap = " + JSON.stringify(stateMap) + ";\n";

fs.writeFileSync(path.join("../", "lib", "codes.js"), str, "utf8");