server.js

const express = require("express");
const https = require("https");
const fs = require("fs");
const CSVToJSON = require("csvtojson");
const path = require("path");
const dotenv = require("dotenv");
dotenv.config();
const app = express();
const port = process.env.PORT || 5000;

// const cert = fs.readFileSync("./firemap_global.crt");
// const ca = fs.readFileSync("./firemap_global.ca-bundle");
// const key = fs.readFileSync("./firemap_global.key");

// let options = {
//   cert: cert, // fs.readFileSync('./ssl/example.crt');
//   ca: ca, // fs.readFileSync('./ssl/example.ca-bundle');
//   key: key, // fs.readFileSync('./ssl/example.key');
// };

// also okay: https.createServer({cert, ca, key}, (req, res) => { ...

app.use("/static", express.static("public"));
app.use(express.json());
app.use(express.static(__dirname));
app.use(express.static(path.join(__dirname, "build")));

let callTime = 25;

function getFireCSV() {
  https.get(
    "https://firms.modaps.eosdis.nasa.gov/data/active_fire/modis-c6.1/csv/MODIS_C6_1_Global_24h.csv",
    (response) => {
      const file = fs.createWriteStream("global.csv");
      response.pipe(file);
      return file;
    }
  );
}

app.get("*", (req, res) => {
  res.sendFile(path.join(__dirname, "build", "index.html"));
});

app.post("/api", (req, res) => {
  // Re-caches .csv hourly.
  const currTime = new Date().getHours();
  if (currTime !== callTime) {
    callTime = new Date().getHours();
    console.log(`Caching new csv file at ${callTime}`);
    getFireCSV();
  }
  CSVToJSON()
    .fromFile("global.csv")
    .then((fires) => {
      res.json(fires);
    })
    .catch((err) => {
      console.log(err);
    });
});

app.listen(port);

console.log(`Server started on port ${port}!`);