js-locations/index.js

A simple Node.js library for accessing country, state, and city data.

const fs = require("fs");

// Function to load data from JSON file
function loadData() {
  try {
    const data = fs.readFileSync("locationsData.json", "utf8"); // Replace 'data.json' with your actual file path
    return JSON.parse(data);
  } catch (error) {
    console.error("Error loading data:", error);
    return null;
  }
}

// Function to retrieve all countries
function getAllCountries() {
  const data = loadData();
  if (!data) return null;
  return data;
}

function getCountryByName(name) {
  const data = loadData();
  if (!data) return null;
  return data.find(
    (country) => country.name.toLowerCase() === name.toLowerCase()
  );
}

// Function to get states by country name (case-insensitive)
function getStatesByCountry(countryName) {
  const country = getCountryByName(countryName);
  if (!country) return null;
  return country.states;
}

// Function to get cities by state name within a country (case-insensitive)
function getCitiesByState(countryName, stateName) {
  const states = getStatesByCountry(countryName);
  if (!states) return null;
  const state = states.find(
    (state) => state.name.toLowerCase() === stateName.toLowerCase()
  );
  if (!state) return null;
  return state.cities;
}

// Function to get phone code by country name (case-insensitive)
function getPhoneCodeByCountry(countryName) {
  const country = getCountryByName(countryName);
  if (!country) return null;
  return country.phone_code;
}

// Function to get currency code by country name (case-insensitive)
function getCurrencySymbolByCountry(countryName) {
  const country = getCountryByName(countryName);
  if (!country) return null;
  return country.currency_symbol;
}

// Example usage
const allCountries = getAllCountries();
console.log("All countries:", allCountries);

const usaData = getCountryByName("United States");
console.log("USA data:", usaData);

const californiaCities = getCitiesByState("United States", "California");
console.log("California cities:", californiaCities);

const canadaPhoneCode = getPhoneCodeByCountry("Canada");
console.log("Canada phone code:", canadaPhoneCode);

const usaCurrencyCode = getCurrencySymbolByCountry("USA"); // USA is not a valid country name but demonstrates functionality for typos
console.log("USA currency code:", usaCurrencyCode); // Outputs null since USA is not found