made resend otp lambda

src/common/utils/helper/resendOtpHelper.ts

@@ -0,0 +1,63 @@
+import * as bcrypt from "bcryptjs";
+import { OtpGenerator, OtpGeneratorSixDigit } from "./OtpGenerator";
+import { encryptUserId } from "./CodeGenerator";
+
+export interface OtpResult {
+  otp: string;
+  hashedOtp: string;
+  expiry: Date;
+  encryptedId: string;
+}
+
+export async function resendOtpHelper(
+  prisma: any,                            
+  userId: number,
+  email: string,
+  emailPurpose: "Register" | "Login" | "ForgotPassword",
+  otpLength: 4 | 6 = 4,
+  expiryMinutes: number = 5
+): Promise<OtpResult> {
+
+  // 1️⃣  Deactivate previous OTPs
+  await prisma.userOtp.updateMany({
+    where: {
+      userXid: userId,
+      otpType: emailPurpose,
+      isActive: true,
+    },
+    data: {
+      isActive: false,
+      isVerified: true,
+    },
+  });
+
+  // 2️⃣ Generate new OTP
+  const otp =
+    otpLength === 6
+      ? OtpGeneratorSixDigit.generateOtp()
+      : OtpGenerator.generateOtp();
+
+  const hashedOtp = await bcrypt.hash(otp, 10);
+  const expiry = new Date(Date.now() + expiryMinutes * 60000);
+  const encryptedId = encryptUserId(userId.toString());
+
+  // 3️⃣ Insert new OTP into table
+  await prisma.userOtp.create({
+    data: {
+      userXid: userId,
+      otpType: emailPurpose,
+      otpCode: hashedOtp,
+      expiresOn: expiry,
+      isVerified: false,
+      isActive: true,
+    },
+  });
+
+  // 4️⃣ Return new OTP (email will use this)
+  return {
+    otp,
+    hashedOtp,
+    expiry,
+    encryptedId,
+  };
+}