find price at time

script.js

const moment = require('moment');

function findPrice(prices, targetMoment) {
  const match = prices.find((data) => {
    const [ts] = data;
    const momentPrice = moment(ts);

    return momentPrice.isSame(targetMoment, 'day');
  });
  const res = match && match[1];

  if (!res) {
    throw Error(
      'No recent price found for %s for targetMoment: %s',
      item.symbol,
      targetMoment.format()
    );
  }

  return res;
}

const priceData = []; // fill this in

const now = moment();
const dayAgo = now.clone().subtract(1, 'days');
const weekAgo = now.clone().subtract(1, 'weeks');
const monthAgo = now.clone().subtract(1, 'months');

const priceDayAgo = findPrice(priceData, dayAgo);
const priceWeekAgo = findPrice(priceData, weekAgo);
const priceMonthAgo = findPrice(priceData, monthAgo);