add service to generate guest account on server

packages/server/controllers/auth.js

@@ -3,6 +3,7 @@ const { validationResult } = require("express-validator");
 const userQueries = require("../data/queries/user");
 const { hashPassword, compareHash } = require("../services/bcrypt");
 const signToken = require("../services/signToken");
+const guestServices = require("../services/guestServices");
 
 const checkValidationErrors = (req, res) => {
   const errors = validationResult(req);
@@ -65,7 +66,7 @@ const login = async (req, res, next) => {
 const guest = async (req, res, next) => {
   try {
     // username generator returns `Guest-${num}`
-    const username = "guest";
+    const { username, password } = guestServices.generateGuest();
     // generateGuestUser();
     const email = null;
     // id generator returns `
@@ -74,6 +75,7 @@ const guest = async (req, res, next) => {
     signToken(res, user);
     res.send(user);
   } catch (e) {
+    console.log(e);
     res.status(500).send({ errors: e });
   }
 };

packages/server/services/guestServices.js

@@ -0,0 +1,25 @@
+const generateRandomPassword = () => {
+  const minLength = 8,
+    maxLength = 16,
+    minUTF = 33,
+    maxUTF = 126;
+  const randomize = (min, max) => Math.floor(Math.random() * (max - min) + min);
+  return Array(randomize(minLength, maxLength))
+    .fill(0)
+    .map(() => String.fromCharCode(randomize(minUTF, maxUTF)))
+    .join("");
+};
+
+const guestService = {
+  currentGuest: 0,
+  generateGuest() {
+    // generate unique username
+    const username = `Guest-${String(this.currentGuest++).padStart(6, 0)}`;
+    // generate random "password"
+    // this exists solely to add extra randomness to signed token and is not validated
+    const password = generateRandomPassword();
+    return { username, password };
+  },
+};
+
+module.exports = guestService;