server.js

// Dependencies
var express = require("express");
var path = require("path");
var fs = require("fs");

// Sets up the Express App
var app = express();
var PORT = process.env.PORT || 3000;

// Sets up the Express app to handle data parsing
app.use(express.urlencoded({ extended: true }));
app.use(express.json());
app.use(express.static("public"));

app.get("/notes", function(req, res) {
    res.sendFile(path.join(__dirname, "/public/notes.html"));
});

app.get("/api/notes", function(req, res) {
    res.sendFile(path.join(__dirname, "/db/db.json"));
});

app.get("*", function(req, res) {
    res.sendFile(path.join(__dirname, "/public/index.html"));
});

app.post("/api/notes", function(req, res) {
    var reqBody = req.body;
    var notes = fs.readFileSync("./db/db.json");
    reqBody.id = String(notes.length);
    notes = JSON.parse(notes);
    notes.push(reqBody);
    fs.writeFileSync("./db/db.json", JSON.stringify(notes));
    res.json(notes);
})

app.delete("/api/notes/:id", function(req, res) {
    var noteId = req.params.id;
    console.log(noteId);
    notes = fs.readFileSync("./db/db.json");
    notes = JSON.parse(notes);
    notes = notes.filter(function(note) {
        if (noteId === note.id ){
            return false;
        }
        else {
            return true;
        }
    })

    fs.writeFileSync("./db/db.json", JSON.stringify(notes));
    res.json(notes);
});


// Starts the server to begin listening
app.listen(PORT, function() {
    console.log("App listening on PORT " + PORT);
});