22 next auth routes

frontend/src/app/(auth)/signup/page.tsx

@@ -21,9 +21,36 @@ export default function SignUpPage() {
     setPasswordShown(!passwordShown);
   };
 
-  const handleSignUp = () => {
+  const handleSignUp = async () => {
     // CHANGE THIS TO NAVIGATE TO NEW PAGE
     console.log("Email", email);
+    try {
+      const resUserExists = await fetch("api/userExists", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ email }),
+      });
+
+      const { user } = await resUserExists.json();
+
+      if (user) {
+        // user exists so return
+        console.log("User already exists");
+        return;
+      }
+      // calling the registration api
+      await fetch("api/signUp", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ email, password }),
+      });
+    } catch (error) {
+      console.log("Error during registration");
+    }
   };
 
   return (

frontend/src/app/api/checkUser/[email]/route.ts

@@ -0,0 +1,20 @@
+import connectDB from "@/database/db";
+import User from "@/database/userSchema";
+import { NextResponse } from "next/server";
+
+type IParams = {
+  params: {
+    email: string;
+  };
+};
+
+export async function GET(req: Request, { params }: IParams) {
+  await connectDB();
+  const { email } = params;
+  try {
+    const user = await User.findOne({ email }).orFail();
+    return NextResponse.json(user);
+  } catch (err) {
+    return NextResponse.json("Error retrieving user.", { status: 404 });
+  }
+}

frontend/src/app/api/signUp/route.ts

@@ -0,0 +1,18 @@
+import connectDB from "@/database/db";
+import User from "@/database/userSchema";
+import { NextResponse } from "next/server";
+
+export async function POST(req: Request) {
+  try {
+    const { email, password } = await req.json();
+    await connectDB();
+    await User.create({ email, password });
+
+    return NextResponse.json({ message: "User registered." }, { status: 201 });
+  } catch (error) {
+    return NextResponse.json(
+      { message: "An error occurred while registering." },
+      { status: 500 },
+    );
+  }
+}

frontend/src/app/api/userExists/route.ts

@@ -0,0 +1,15 @@
+import connectDB from "@/database/db";
+import User from "@/database/userSchema";
+import { NextResponse } from "next/server";
+
+export async function POST(req: Request) {
+  try {
+    await connectDB();
+    // sending email in POST request
+    const { email } = await req.json();
+    const user = await User.findOne({ email }).select("_id");
+    return NextResponse.json({ user });
+  } catch (error) {
+    console.log(error);
+  }
+}

frontend/src/database/userSchema.ts

@@ -0,0 +1,9 @@
+import mongoose, { Schema } from "mongoose";
+
+const UserSchema = new Schema({
+  name: { type: String, required: false },
+  email: { type: String, required: true },
+  password: { type: String, required: true },
+});
+
+export default mongoose.models.User || mongoose.model("User", UserSchema);