6-completed_tasks.js

#!/usr/bin/node

const URL = process.argv[2];
const request = require('request');

request.get(URL, { json: true }, (error, response, body) => {
  if (error) {
    console.log(error);
    return;
  }

  if (response.statusCode !== 200) {
    console.log(error);
    return;
  }

  const todos = {};
  body.forEach((todo) => {
    if (todo.completed) {
      if (!todos[todo.userId]) {
        todos[todo.userId] = 1;
      } else {
        todos[todo.userId]++;
      }
    }
  });

  const length = Object.keys(todos).length;
  if (length === 0) {
    console.log('{}');
    return;
  }

  if (length === 2) {
    let output = '{ ';
    let isFirst = true;
    for (const key in todos) {
      if (!isFirst) {
        output += ', ';
      }
      output += `'${key}': ${todos[key]}`;
      isFirst = false;
    }
    output += ' }';
    console.log(output);
  } else {
    let task = 0;
    for (const key in todos) {
      if (task === 0) {
        if (length !== 1) {
          console.log('{ \'' + key + '\': ' + todos[key] + ',');
        } else {
          console.log('{ \'' + key + '\': ' + todos[key] + ' }');
        }
      } else if (task === length - 1) {
        console.log('  \'' + key + '\': ' + todos[key] + ' }');
      } else {
        console.log(`  '${key}': ${todos[key]},`);
      }
      task++;
    }
  }
});