JavaScript: Country Codes
Date
Author
In this challenge, the given REST API contains information about countries.
Given a two-letter unique country code, the task is to use the API to get the name of the country with the given code.
The given API uses pagination to return the data divided into pages. Fetching the whole data available on the API requires multiple requests.
To get a single page of countries data, perform HTTP GET request to
https://jsonmock.hackerrank.com/api/countries?page=<pageNumber>
where <pageNumber> is an integer denoting the page number of the results we are requesting.
For example, a GET request to
https://jsonmock.hackerrank.com/api/countries?page=2
will return the second page of the collection of countries. Pages are numbered from 1, so in order to access the first page, you need to ask for page number 1.
The response to such request is a JSON with the following 5 fields:
page: The current page of the results.per_page: The maximum number of countries returned per page.total: The total number of countries on all pages of the results.total_pages: The total number of pages with results.data: An array of objects containing country information on the requested page.
Each country record has several fields, but in this task only these two are relevant:
name: The name of the country.alpha2Code: The two-letter unique code of the country.
The following is guaranteed:
- There exists a country with the given code in the collection of countries available on the API.
- No two countries in the collection available on the API have the same alpha2code value.
Function Description
Complete the function getCountryName in the editor below.
getCountryName has the following parameter:
string code: a two-letter string denoting the given country code
Returns:
string: the name of the country with the given country code
'use strict';
const fs = require('fs');
const axios = require('axios');
process.stdin.resume();
process.stdin.setEncoding('utf-8');
let inputString = '';
let currentLine = 0;
process.stdin.on('data', function(inputStdin) {
inputString += inputStdin;
});
process.stdin.on('end', function() {
inputString = inputString.split('\n');
main();
});
function readLine() {
return inputString[currentLine++];
}
async function getCountryName(code) {
let page = 1;
let totalPages = 1;
while (page <= totalPages) {
const url = `https://jsonmock.hackerrank.com/api/countries?page=${page}`;
const response = await axios.get(url);
const data = response.data;
totalPages = data.total_pages;
const country = data.data.find((country) => country.alpha2Code === code);
if (country) {
return country.name;
}
page++;
}
}
async function main() {
const ws = fs.createWriteStream(process.env.OUTPUT_PATH);
const code = readLine().trim();
const name = await getCountryName(code);
ws.write(`${name}\n`);
ws.end();
}