add the redis

app/utils/emailVerification.util.js

@@ -1,19 +1,20 @@
-//app/utils/emailVerification.util.js
+// app/utils/emailVerification.util.js
+
 const crypto = require("crypto");
 
-/**
- * Generate a cryptographically secure
- * random email-verification token.
- */
+const redis = require("../config/redisClient");
+
+const EMAIL_VERIFICATION_TTL =
+  Number(
+    process.env.EMAIL_VERIFICATION_TTL_SECONDS
+  ) || 1800;
+
 const generateEmailVerificationToken = () => {
-  return crypto.randomBytes(32).toString("hex");
+  return crypto
+    .randomBytes(32)
+    .toString("hex");
 };
 
-
-/**
- * Hash verification token before
- * storing it in database.
- */
 const hashEmailVerificationToken = (token) => {
   return crypto
     .createHash("sha256")
@@ -21,8 +22,82 @@ const hashEmailVerificationToken = (token) => {
     .digest("hex");
 };
 
+const createEmailVerification = async (userId) => {
+
+  // 1. Generate raw token
+  const token =
+    generateEmailVerificationToken();
+
+
+  // 2. Hash token
+  const tokenHash =
+    hashEmailVerificationToken(token);
+
+
+  // 3. Create Redis key
+  const redisKey =
+    `email-verification:${tokenHash}`;
+
+  await redis.set(
+    redisKey,
+    userId,
+    "EX",
+    EMAIL_VERIFICATION_TTL
+  );
+
+  return token;
+};
+
+
+/**
+ * Check a verification token.
+ */
+const verifyEmailVerificationToken =
+  async (token) => {
+
+    if (
+      !token ||
+      typeof token !== "string"
+    ) {
+      return null;
+    }
+
+
+    // 1. Hash token received from user
+    const tokenHash =
+      hashEmailVerificationToken(token);
+
+
+    // 2. Build same Redis key
+    const redisKey =
+      `email-verification:${tokenHash}`;
+
+
+    // 3. Search Redis
+    const userId =
+      await redis.get(redisKey);
+
+    if (!userId) {
+      return null;
+    }
+
+
+    return {
+      userId,
+      redisKey,
+    };
+  };
+
+const deleteEmailVerification =
+  async (redisKey) => {
+
+    await redis.del(redisKey);
+  };
+
 
 module.exports = {
-  generateEmailVerificationToken,
+  createEmailVerification,
+  verifyEmailVerificationToken,
+  deleteEmailVerification,
   hashEmailVerificationToken,
 };