app.js

const express = require("express");
const path = require("path");
const logger = require("morgan");
const cookieParser = require("cookie-parser");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");
const session = require("express-session");
const MongoStore = require("connect-mongo")(session);
const cors = require("cors");
require("dotenv").config();

const authRouter = require("./routes/auth.router");
const usersRouter = require("./routes/users.router");
const ordersRouter = require("./routes/orders.router");
const recipesRouter = require("./routes/recipes.router");
const ingredientsRouter = require("./routes/ingredients.router");
const packagingsRouter = require("./routes/packagings.router");
const brandsRouter = require("./routes/brands.router");

// MONGOOSE CONNECTION
mongoose
  .connect(process.env.MONGODB_URI, {
    keepAlive: true,
    useNewUrlParser: true,
    useUnifiedTopology: true,
  })
  .then(() => console.log(`Connected to database`))
  .catch((err) => console.error(err));

// EXPRESS SERVER INSTANCE
const app = express();

// CORS MIDDLEWARE SETUP
app.use(
  cors({
    credentials: true,
    origin: [
      process.env.PUBLIC_DOMAIN,
      "http://gastro-experience.herokuapp.com",
      "https://gastro-experience.herokuapp.com",
    ],
  })
);

// SESSION MIDDLEWARE
app.use(
  session({
    store: new MongoStore({
      mongooseConnection: mongoose.connection,
      ttl: 30 * 24 * 60 * 60, // 30 days
    }),
    secret: process.env.SECRET_SESSION,
    resave: true,
    saveUninitialized: true,
    cookie: {
      maxAge: 30 * 24 * 60 * 60 * 1000,
    },
  })
);

// MIDDLEWARE
app.use(logger("dev"));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));

// ROUTER MIDDLEWARE
app.use("/auth", authRouter);

app.use("/api/users", usersRouter);
app.use("/api/orders", ordersRouter);
app.use("/api/recipes", recipesRouter);
app.use("/api/ingredients", ingredientsRouter);
app.use("/api/packagings", packagingsRouter);
app.use("/api/brands", brandsRouter);

// ROUTE FOR SERVING REACT APP (index.html)
app.use((req, res, next) => {
  // If no previous routes match the request, send back the React app.
  res.sendFile(__dirname + "/public/index.html");
});

// ERROR HANDLING
// Catch 404 and respond with error message
// Shows a 404 error with a message when no route is found for the request
app.use((req, res, next) => {
  res.status(404).json({ code: "route not found" });
});

// Catch `next(err)` calls
app.use((err, req, res, next) => {
  // always log the error
  console.error("ERROR", req.method, req.path, err);

  // only render if the error ocurred before sending the response
  if (!res.headersSent) {
    const statusError = err.status || "500";
    res.status(statusError).json(err);
  }
});

module.exports = app;