app.js

const express = require("express");
const app = express();
const path = require("path");

// Import routes
const humans = require("./routes/humans");
const locations = require("./routes/locations");
const users = require("./routes/users");

// For environment variables
require("dotenv").config();

// Bcrypt for password encryption
const bcrypt = require("bcrypt");

// Database initialization
const MongoClient = require("mongodb").MongoClient;

MongoClient.connect(
  `mongodb+srv://${process.env.MONGO_USER}:${process.env.MONGO_PASS}@sandbox.1ybr6.mongodb.net/myFirstDatabase?retryWrites=true&w=majority`,
  { useUnifiedTopology: true },
  function (err, client, res) {
    if (err != null) {
      res.send(err);
    }

    app.locals.db = client.db("bootcamp_project2");
    console.log(`Connected to database...`);
  }
);

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

// With this, it doesn't run
// app.get('/*', (req, res) => {
//   res.sendFile(path.join(__dirname, 'build', 'index.html'));
// });
app.use(express.json());

// External routes
app.use("/api/humans/", humans);
app.use("/api/locations/", locations);
app.use("/api/users/", users);

// Express session
const expressSession = require("express-session")({
  secret: process.env.SESSION_SECRET,
  resave: false,
  saveUninitialized: false,
});
app.use(expressSession);

// Passport
const passport = require("passport");
app.use(passport.initialize());
app.use(passport.session());

const LocalStrategy = require("passport-local").Strategy;

passport.use(
  new LocalStrategy({ usernameField: "email" }, function (
    email,
    password,
    done
  ) {
    app.locals.db
      .collection("users")
      .find({ email: email })
      .toArray(function (err, users) {
        if (users.length === 0) {
          return done(null, false);
        }
        const user = users[0];

        if (bcrypt.compareSync(password, user.password)) {
          return done(null, user);
        } else {
          return done(null, false);
        }
      });
  })
);

passport.serializeUser(function (user, done) {
  done(null, user.email);
});

passport.deserializeUser(function (email, done) {
  app.locals.db
    .collection("users")
    .find({ email: email })
    .toArray(function (err, users) {
      if (users.length === 0) {
        console.log("0 users");
        done(null, null);
      }
      console.log("1 user");
      done(null, users[0]);
    });
});

// Route to check if user is logged
app.get("/api/login/check", (req, res) => {
  if (req.session.passport) {
    res.send({ isLogged: true, user: req.session.passport.user });
    return;
  }
  res.send({ isLogged: false });
});

app.post("/api/signin", function (req, res) {
  const email = req.body.email.trim();
  const password = bcrypt.hashSync(req.body.password, 10);
  const name = req.body.name.trim();
  const surname = req.body.surname.trim();
  const dateCreation = new Date();

  app.locals.db.collection("users").findOne({ email: email }, (err, user) => {
    if (!user) {
      app.locals.db.collection("users").insertOne(
        {
          name,
          surname,
          email,
          password,
          date_creation: dateCreation,
        },
        (err, respuesta) => {
          if (err !== null) {
            res.send({
              new_user: false,
              success: false,
              msg: "An error occurred: " + err,
            });
          } else {
            res.send({
              new_user: true,
              success: true,
              msg: "User was registered",
            });
          }
        }
      );
    } else {
      res.send({ new_user: false, msg: "User is already registered" });
    }
  });
});

app.post(
  "/api/login",
  passport.authenticate("local", {
    successRedirect: "/success",
    failureRedirect: "/fail",
  })
);

app.get("/success", (req, res) => {
  res.send({
    loginDataCorrect: true,
    msg: "Login successful",
    user: req.user,
    session: true,
  });
});

app.get("/fail", (req, res) => {
  res.send({
    loginDataCorrect: false,
    msg: "Wrong user or password",
    session: false,
  });
});

app.put("/api/logout", (req, res) => {
  req.session.destroy(function (err) {
    res.send({ loggedOut: true, msg: "Logout successful" });
  });
});

// Redirect all requests to index.html
app.get("/*", function (req, res) {
  res.sendFile(path.join(__dirname, "./build/index.html"), function (err) {
    if (err) {
      res.status(500).send(err);
    }
  });
});

const port = process.env.PORT || 3000;
app.listen(port, () => console.log(`Listening on port ${port}...`));