index.ts

import { Express, Request, Response } from "express";
import express = require("express");
import "dotenv/config";
import { Postgress } from "./api/infrastructure/Postgres";
import { Locations } from "./api/repositories/Locations";
import { LocationCluster } from "./api/usecases/LocationCluster";

function startApi() {
  const app: Express = express();

  const host = String(process.env.PG_HOST);
  const username = String(process.env.PG_USERNAME);
  const password = String(process.env.PG_PASSWORD);
  const database = String(process.env.PG_DATABASE);
  const port = Number(process.env.PG_PORT);
  const db = new Postgress(host, username, password, database, port);

  const locationRepository = new Locations(db.getPool());
  const locationClusterUseCase = new LocationCluster(locationRepository);

  app.get("/points", (req: Request, res: Response) => {
    const west = Number(req.query.west);
    const south = Number(req.query.south);
    const east = Number(req.query.east);
    const north = Number(req.query.north);
    const zoom = Number(req.query.zoom);

    locationClusterUseCase
      .getClusteredPoint(west, south, east, north, zoom)
      .then((result) => {
        res.json(result);
      })
      .catch((error) => {
        res.json(error);
      });
  });

  app.use(express.static("public"));

  app.listen(process.env.PORT || 3000, () => {
    console.log("server running");
  });
}

startApi();