Assembly task

js

const bodyParser = require('body-parser');
const express = require('express')
const port = 3800;
const museumData = require('./data.json');
const _ = require('lodash');
const app = express();


app.get("/", (req, res) => {
  res.send("Hello World!");
});

const monthMap = {
  '01': 'Jan',
  '02': 'Feb',
  '03': 'Mar',
  '04': 'Apr',
  '05': 'May',
  '06': 'June',
  '07': 'Jul',
  '08': 'Aug',
  '09': 'Sep',
  '10': 'Oct',
  '11': 'Nov',
  '12': 'Dec'
};

app.get("/api/visitors", (req, res) => {
  const date = req.query.date || null;
  const ignore = req.query.ignore || null;

  if (_.isNull(date) ) {  // TODO add check if date is valid
    res.status(400).send({ error: "Missing Date"});
  }
  const year = new Date(parseInt(date)).getFullYear();
  const month = new Date(parseInt(date)).getMonth();
  const formattedDate = `${year}-${month<10 ? `0${month}` : month}-01T00:00:00.000`

  const data = museumData.find((data) => data["month"]===formattedDate);
  console.log(data);
  let max = -Infinity;
  let min = +Infinity;
  let maxMus = '';
  let minMus = '';
  // let ignoreCount;
  // let validIgnore = false;
  // console.log(data);
  //  if (!_.isNull(ignore)) {
  //    if (data[ignore]) {
  //     validIgnore = true;
  //     ignoreCount = data[ignore];
  //     delete data[ignore]

  //    }
  //  }


  let total = 0
  const keys = Object.keys(data);
  for (let i = 0; i < keys.length ; i++) {
    if (keys[i] !== 'month' && keys[i] !== ignore) {
      if (parseInt(data[keys[i]]) > max) {
        max = parseInt(data[keys[i]]);
        maxMus = keys[i];
      }

      if (parseInt(data[keys[i]]) < min) {
        min = parseInt(data[keys[i]]);
        minMus = keys[i];
      }
      total += parseInt(data[keys[i]]);
      
      console.log('total', total, 'data', data[keys[i]], keys[i]);

    }
  }

  // const result = { maxVistor: max, maxMuseum: maxMus, minVisitor: min, minMuseum: minMus, totalVisitors: total};
  const result = { 
    year,
    month: monthMap[month<10 ? `0${month}` : ''+month],
    highest: {museum: maxMus, visitors: max},
    lowest: { museum: minMus, visitors: min },
    total
  };
 
  if (!_.isNull(ignore)) {
    if (data[ignore]) {
      result["ignored"] = { museum: ignore, visitor: data[ignore]};
    }
  }


  res.status(200).send({attendance: result});

})

app.listen(port, () => {
  console.log(`Example app listening at http://localhost:${port}`);
});