A Slack bot for tracking Covid-19 cases and deaths in your state.

Covid-19-Slack-Bot.js

const puppeteer = require("puppeteer");
const axios = require("axios");

let lastSeenStats = { cases: 0, deaths: 0 };
const STATE = "Utah" // Change this to the state you want to test for

const sendSlack = stats => {
  axios.post(
    "YOUR_SLACK_WEBHOOK_URL HERE",
    {
      username: `${STATE} Covid 19 Tracker Bot`,
      icon_emoji: ":mask:",
      text: `As of the time of posting, ${STATE} now has:`,
      attachments: [
        {
          fallback: `There are now ${stats.cases} confirmed cases, and ${stats.deaths} confirmed deaths.`,
          fields: [
            {
              title: "Confirmed Cases:",
              value: stats.cases
            },
            {
              title: "Confirmed Deaths:",
              value: stats.deaths
            }
          ]
        }
      ]
    }
  );
};

const getStats = async () => {
  const browser = await puppeteer.launch({});
  const page = await browser.newPage();
  await page.goto(
    "https://www.nytimes.com/interactive/2020/us/coronavirus-us-cases.html"
  );
  const stats = await page.evaluate(async () => {
    const delay = time => {
      return new Promise(function(resolve) {
        setTimeout(resolve, time);
      });
    };
    await delay(1000);
    document.querySelector("#g-cases-by-state button").click();
    await delay(1000);
    const allCells = document.querySelectorAll("#g-cases-by-state tbody td");
    const utahRow = Array.from(allCells).find(t => t.innerText === STATE);
    const cells = utahRow.parentNode.childNodes;
    const cellsArray = Array.from(cells).map(t => t.innerText);
    const cases = cellsArray[2];
    const deaths = cellsArray[4];
    return { cases, deaths };
  });
  await browser.close();
  lastSeenStats = stats;
  if (
    lastSeenStats.cases !== stats.cases ||
    lastSeenStats.deaths !== stats.deaths
  ) {
    sendSlack(stats);
  }
};

setInterval(getStats, 600000); //Change this number to check more/less often.