Refactor email encryption handling in user and contact message models: Introduce utility functions for encoding and decoding encrypted values, simplifying the encryption process. Update the registerUser and handleForgotPassword functions to support multiple encrypted email formats. Enhance the VocabCourseView and VocabLessonView components with new methods for managing language assistant interactions, improving user experience.

backend/services/authService.js

@@ -14,6 +14,14 @@ import Friendship from '../models/community/friendship.js';
 
 const saltRounds = 10;
 
+const buildEncryptedEmailCandidates = (email) => {
+    const encrypted = encrypt(email);
+    return [
+        Buffer.from(encrypted, 'utf8'),
+        Buffer.from(encrypted, 'hex')
+    ];
+};
+
 const getFriends = async (userId) => {
     console.log('getFriends', userId);
     try {
@@ -54,13 +62,13 @@ const getFriends = async (userId) => {
 };
 
 export const registerUser = async ({ email, username, password, language }) => {
-    const encryptedEmail = encrypt(email);
+    const encryptedEmailCandidates = buildEncryptedEmailCandidates(email);
     const query = `
         SELECT id FROM community.user
-        WHERE email = :encryptedEmail
+        WHERE email = ANY(:encryptedEmails)
     `;
     const existingUser = await sequelize.query(query, {
-        replacements: { encryptedEmail },
+        replacements: { encryptedEmails: encryptedEmailCandidates },
         type: sequelize.QueryTypes.SELECT,
     });
     if (existingUser.length > 0) {
@@ -170,7 +178,14 @@ export const logoutUser = async (hashedUserId) => {
 };
 
 export const handleForgotPassword = async ({ email }) => {
-    const user = await User.findOne({ where: { email } });
+    const encryptedEmailCandidates = buildEncryptedEmailCandidates(email);
+    const user = await User.findOne({
+        where: {
+            email: {
+                [Op.in]: encryptedEmailCandidates
+            }
+        }
+    });
     if (!user) {
         throw new Error('Email not found');
     }