server.js

require("dotenv").config();

const express = require("express");
const models = require("./server/models");
const expressGraphQL = require("express-graphql");
const mongoose = require("mongoose");
const session = require("express-session");
const passport = require("passport");
const passportConfig = require("./server/services/auth");
const MongoStore = require("connect-mongo");
const schema = require("./server/schema/schema");

// Create a new Express application
const app = express();

if (process.env.NODE_ENV === "production") {
  app.use(express.static("client/build"));
}

// Replace with your mongoLab URI
const MONGO_URI = process.env.MONGO_URI;

// Mongoose's built in promise library is deprecated, replace it with ES2015 Promise
mongoose.Promise = global.Promise;

// Connect to the mongoDB instance and log a message
// on success or failure
mongoose.connect(MONGO_URI);
mongoose.connection
  .once("open", () => console.log("Connected to MongoLab instance."))
  .on("error", error => console.log("Error connecting to MongoLab:", error));

// Configures express to use sessions.  This places an encrypted identifier
// on the users cookie.  When a user makes a request, this middleware examines
// the cookie and modifies the request object to indicate which user made the request
// The cookie itself only contains the id of a session; more data about the session
// is stored inside of MongoDB.
app.use(
  session({
    resave: true,
    saveUninitialized: true,
    secret: process.env.SECRET,
    store: MongoStore.create({
      mongoUrl: MONGO_URI,
      autoReconnect: true
    })
  })
);

// Passport is wired into express as a middleware. When a request comes in,
// Passport will examine the request's session (as set by the above config) and
// assign the current user to the 'req.user' object.  See also servces/auth.js
app.use(passport.initialize());
app.use(passport.session());

// Instruct Express to pass on any request made to the '/graphql' route
// to the GraphQL instance.
app.use(
  "/graphql",
  expressGraphQL({
    schema,
    graphiql: true
  })
);

app.listen(process.env.PORT || 3001, () => {
  console.log("Listening");
});