server.js

const express = require("express");
const mongoose = require("mongoose");
const bodyParser = require("body-parser");
const passport = require("passport");
const path = require("path");
const methodOverride = require("method-override");
const multer = require("multer");
const GridFsStorage = require("multer-gridfs-storage");
const Grid = require("gridfs-stream");

const users = require("./routes/api/users");
const profile = require("./routes/api/profile");
const posts = require("./routes/api/posts");

const app = express();

// Body parser middleware
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(methodOverride("_method"));

// DB Config
const db = require("./config/keys").mongoURI;

// Connect to MongoDB
mongoose
  .connect(db)
  .then(() => console.log("MongoDB Connected"))
  .catch(err => console.log(err));

const conn = mongoose.createConnection(db);

// Passport middleware
app.use(passport.initialize());

// Passport Config
require("./config/passport")(passport);

// Use Routes
app.use("/api/users", users);
app.use("/api/profile", profile);
app.use("/api/posts", posts);

let gfs;

exports.gfs = conn.once("open", () => {
  // Init stream
  gfs = Grid(conn.db, mongoose.mongo);
  gfs.collection("profiles");
});

// Server static assets if in production
if (process.env.NODE_ENV === "production") {
  // Set static folder
  app.use(express.static("client/build"));

  app.get("*", (req, res) => {
    res.sendFile(path.resolve(__dirname, "client", "build", "index.html"));
  });
}

const port = process.env.PORT || 5000;

app.listen(port, () => console.log(`Server running on port ${port}`));

exports.db = db;