16: Add signup/signin with google

.eslintrc.json

@@ -16,6 +16,7 @@
     "object-shorthand": "off",
     "prefer-destructuring": ["error", { "object": true, "array": false }],
     "quotes": ["error", "double", { "allowTemplateLiterals": true }],
-    "spaced-comment": "off"
+    "spaced-comment": "off",
+    "import/extensions": "off",
   }
 }

app.js

@@ -4,6 +4,7 @@ import compression from "compression";
 import cors from "cors";
 import rateLimit from "express-rate-limit";
 import ingredients from "./routes/ingredients.js";
+import users from "./routes/users.js";
 import globalErrorHandler from "./utils/globalErrorHandler.js";
 
 const app = express();
@@ -35,6 +36,7 @@ app.use(compression());
 
 // 6. Routes
 app.use("/api/ingredients", ingredients);
+app.use("/auth", users);
 
 app.all("*", (req, res) => {
   res.status(404).json({

index.js

@@ -1,14 +1,11 @@
 import dotenv from "dotenv";
 import mongoose from "mongoose";
+import app from "./app.js";
 
 dotenv.config({ path: "./config.env" });
 
-import app from "./app.js";
-
 // CONNECT MONGO
-const DB = process.env.DB;
-console.log({ DB });
-mongoose.connect(DB).then(() => console.log("DB connection successful!"));
+mongoose.connect(process.env.DB).then(() => console.log("DB connection successful!"));
 
 const PORT = process.env.PORT || 8000;
 app.listen(PORT, () => {

models/users.js

@@ -0,0 +1,23 @@
+import mongoose from "mongoose";
+
+const usersSchema = new mongoose.Schema({
+  email: {
+    type: String,
+    required: [true, "User should have an email"],
+    unique: [true, "User with this email already exists"]
+  },
+  name: {
+    type: String,
+    required: [true, "User should have a name"]
+  },
+  password: String,
+  authSource: {
+    type: String,
+    enum: ["self", "google"],
+    default: "self"
+  }
+});
+
+const Users = mongoose.model("Users", usersSchema);
+
+export default Users;

package.json

@@ -31,6 +31,8 @@
     "eslint-plugin-node": "^11.1.0",
     "express": "^4.20.0",
     "express-rate-limit": "^7.4.0",
+    "google-auth-library": "^9.14.1",
+    "jsonwebtoken": "^9.0.2",
     "mongoose": "^8.3.1",
     "morgan": "^1.10.0"
   },

routes/users.js

@@ -0,0 +1,38 @@
+import dotenv from "dotenv";
+import express from "express";
+import { OAuth2Client } from "google-auth-library";
+import jwt from "jsonwebtoken";
+import Users from "../models/users.js";
+
+dotenv.config({ path: "./config.env" });
+const router = express.Router();
+const client = new OAuth2Client();
+const { JWT_SECRET } = process.env;
+
+router.post("/google", async (req, res) => {
+  const { credential, clientId } = req.body;
+  try {
+    const ticket = await client.verifyIdToken({
+      idToken: credential,
+      audience: clientId
+    });
+    const payload = ticket.getPayload();
+
+    let user = await Users.findOne({ email: payload.email });
+    if (!user) {
+      user = await Users.create({
+        email: payload.email,
+        name: payload.name,
+        authSource: "google"
+      });
+    }
+
+    const token = jwt.sign({ user }, JWT_SECRET);
+
+    res.status(200).json({ data: payload, jwt: token });
+  } catch (e) {
+    res.status(400).json({ msg: err });
+  }
+});
+
+export default router;