BD1.5_Assignment_2.js

let express = require("express");
let cors = require("cors");

let app = express();
app.use(cors());
let port = 3000;

// Endpoint 1
app.get("/calculate-returns", (req, res) => {
  let boughtAt = parseFloat(req.query.boughtAt);
  let marketPrice = parseFloat(req.query.marketPrice);
  let quantity = parseFloat(req.query.quantity);
  let returns = (marketPrice - boughtAt) * quantity;
  res.send(returns.toString());
});

// Endpoint 2
app.get("/total-returns", (req, res) => {
  let stock1 = parseFloat(req.query.stock1);
  let stock2 = parseFloat(req.query.stock2);
  let stock3 = parseFloat(req.query.stock3);
  let stock4 = parseFloat(req.query.stock4);
  let totalStock = stock1 + stock2 + stock3 + stock4;
  res.send(totalStock.toString());
});

// Endpoint 3
app.get("/calculate-return-percentage", (req, res) => {
  let boughtAt = parseFloat(req.query.boughtAt);
  let returns = parseFloat(req.query.returns);
  let returnPercentage = (returns / boughtAt) * 100;
  res.send(returnPercentage.toString());
});

// Endpoint 4
app.get("/total-return-percentage", (req, res) => {
  let stock1 = parseFloat(req.query.stock1);
  let stock2 = parseFloat(req.query.stock2);
  let stock3 = parseFloat(req.query.stock3);
  let stock4 = parseFloat(req.query.stock4);
  let totalStock = stock1 + stock2 + stock3 + stock4;
  res.send(totalStock.toString());
});

// Endpoint 5
app.get("/status", (req, res) => {
  let returnPercentage = parseFloat(req.query.returnPercentage);
  let result = "";
  if (returnPercentage > 0) {
    result = "profit";
  } else {
    result = "loss";
  }
  res.send(result.toString());
});

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