Enhanced client-side password validation

client/src/App.tsx

@@ -18,6 +18,7 @@ const validationSchema = Yup.object({
     .required("Last Name is required"),
   email: Yup.string()
     .trim()
+    .lowercase()
     .min(5)
     .max(69)
     .email("Invalid email format")
@@ -31,6 +32,10 @@ const validationSchema = Yup.object({
     .trim()
     .min(8, "Password must be at least 8 characters")
     .max(69, "Password must be at most 69 characters")
+    .matches(
+      /^(?=.*[a-zA-Z])(?=.*[0-9]).{8,}$/,
+      "Password needs to contain both letters and numbers"
+    )
     .required("Password is required"),
   terms: Yup.boolean().oneOf(
     [true],
@@ -51,7 +56,7 @@ export default function App() {
   const handleSubmit = async (values: any) => {
     try {
       const response = await axios.post(
-        config.serverAddress + "/users",
+        config.serverAddress + "/users/register",
         values
       );
       console.log("User created successfully:", response.data);

server/routes/users.js

@@ -20,8 +20,15 @@ let validationSchema = yup.object({
   password: yup.string().trim().max(100).required(),
 });
 
-router.post("/", async (req, res) => {
+router.post("/register", async (req, res) => {
   let data = req.body;
+  let user = await User.findOne({
+    where: { email: data.email },
+  });
+  if (user) {
+    res.status(400).json({ message: "Email already exists." });
+    return;
+  }
   try {
     data.id = uuidV4();
     data.password = await argon2.hash(data.password);
@@ -39,7 +46,7 @@ router.post("/", async (req, res) => {
   }
 });
 
-router.get("/", async (req, res) => {
+router.get("/all", async (req, res) => {
   let condition = {};
   let search = req.query.search;
   if (search) {
@@ -56,7 +63,7 @@ router.get("/", async (req, res) => {
   res.json(list);
 });
 
-router.get("/:id", async (req, res) => {
+router.get("/individual/:id", async (req, res) => {
   let id = req.params.id;
   let user = await User.findByPk(id);
   if (!user) {
@@ -66,7 +73,7 @@ router.get("/:id", async (req, res) => {
   res.json(user);
 });
 
-router.put("/:id", async (req, res) => {
+router.put("/individual/:id", async (req, res) => {
   let id = req.params.id;
   let user = await User.findByPk(id);
 
@@ -98,7 +105,7 @@ router.put("/:id", async (req, res) => {
   }
 });
 
-router.delete("/:id", async (req, res) => {
+router.delete("/individual/:id", async (req, res) => {
   let id = req.params.id;
   let user = await User.findByPk(id);