index.js

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

const app = express();

app.use(cors());
app.use(express.json());

let notes = [
  {
    id: 1,
    content: "Note example",
    important: true,
  },
];

app.get("/", (request, response) => {
  response.send("<h1>Hello World!</h1>");
});

app.get("/api/notes", (request, response) => {
  response.json(notes);
});

app.get("/api/notes/:id", (request, response) => {
  const id = request.params.id;
  const note = notes.find((note) => note.id === id);

  if (note) {
    response.json(note);
  } else {
    response.status(404).end();
  }
});

app.delete("/api/notes/:id", (request, response) => {
  const id = request.params.id;
  notes = notes.filter((note) => note.id !== id);

  response.status(204).end();
});

app.post("/api/notes", (request, response) => {
  const note = request.body;
  console.log(note);
  response.json(note);
});

const PORT = process.env.PORT || 3001;
app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});