app.js

const path = require("path");
const express = require("express");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");
const multer = require("multer");

const feedRoutes = require("./routes/feed");
const authRoutes = require("./routes/auth");

const app = express();

const fileStorage = multer.diskStorage({
  destination: (req, file, cb) => {
    cb(null, "images");
  },
  filename: (req, file, cb) => {
    cb(null, new Date().toISOString() + "-" + file.originalname);
  },
});

const filter = (req, file, cb) => {
  if (
    file.mimetype === "image/png" ||
    file.mimetype === "image/jpg" ||
    file.mimetype === "image/jpeg"
  ) {
    cb(null, true);
  } else {
    cb(null, false);
  }
};

app.use(bodyParser.json());
app.use(multer({ storage: fileStorage, fileFilter: filter }).single("image"));
app.use("/images", express.static(path.join(__dirname, "images")));
app.use((req, res, next) => {
  res.setHeader("Access-Control-Allow-Origin", "*");
  res.setHeader("Access-Control-Allow-Method", "GET, POST, PUT, PATCH, DELETE");
  res.setHeader("Access-Control-Allow-Headers", "Content-Type, Authorization");
  next();
});
app.use(feedRoutes);
app.use(authRoutes);

app.use((error, req, res, next) => {
  const statusCode = error.statusCode || 500;
  const message = error.message;
  const body = error.body;
  res.status(statusCode).json({
    message: message,
    errorBody: body,
  });
});

mongoose
  .connect(" mongodb://127.0.0.1:27017/feed", {
    useNewUrlParser: true,
    useUnifiedTopology: true,
  })
  .then((result) => {
    console.log("connected to database.");
    app.listen(8080);
  })
  .catch((err) => {
    console.log(err);
  });