tabungin/FINAL_FIXES.md

# ✅ Final Fixes - Change Password & Resend OTP

## 🐛 **Issues Fixed:**

### 1. ✅ **Change Password Not Functioning**
### 2. ✅ **Resend OTP Email Error**

---

## 🔧 **Fix 1: Change Password Implementation**

### **Backend Changes:**

#### **Added Endpoint** (`auth.controller.ts`):
```typescript
@Post('change-password')
@UseGuards(JwtAuthGuard)
async changePassword(
  @Req() req: RequestWithUser,
  @Body() body: { currentPassword: string; newPassword: string },
) {
  return this.authService.changePassword(
    req.user.userId,
    body.currentPassword,
    body.newPassword,
  );
}
```

#### **Added Service Method** (`auth.service.ts`):
```typescript
async changePassword(
  userId: string,
  currentPassword: string,
  newPassword: string,
) {
  // Get user with password hash
  const user = await this.prisma.user.findUnique({
    where: { id: userId },
    select: { passwordHash: true },
  });

  if (!user || !user.passwordHash) {
    throw new BadRequestException('Cannot change password for this account');
  }

  // Verify current password
  const isValid = await bcrypt.compare(currentPassword, user.passwordHash);
  if (!isValid) {
    throw new UnauthorizedException('Current password is incorrect');
  }

  // Hash new password
  const newPasswordHash = await bcrypt.hash(newPassword, 10);

  // Update password
  await this.prisma.user.update({
    where: { id: userId },
    data: { passwordHash: newPasswordHash },
  });

  return {
    success: true,
    message: 'Password changed successfully',
  };
}
```

### **Frontend Changes:**

#### **Added States** (`Profile.tsx`):
```typescript
const [currentPassword, setCurrentPassword] = useState("")
const [newPassword, setNewPassword] = useState("")
const [confirmPassword, setConfirmPassword] = useState("")
const [passwordLoading, setPasswordLoading] = useState(false)
const [passwordError, setPasswordError] = useState("")
const [passwordSuccess, setPasswordSuccess] = useState("")
```

#### **Added Handler**:
```typescript
const handleChangePassword = async () => {
  // Validation
  if (!currentPassword || !newPassword || !confirmPassword) {
    setPasswordError("All fields are required")
    return
  }

  if (newPassword !== confirmPassword) {
    setPasswordError("New passwords do not match")
    return
  }

  if (newPassword.length < 6) {
    setPasswordError("New password must be at least 6 characters")
    return
  }

  // Call API
  await axios.post(`${API}/auth/change-password`, {
    currentPassword,
    newPassword
  })
  
  setPasswordSuccess("Password changed successfully!")
  // Clear fields
}
```

#### **Updated UI**:
- Connected inputs to state
- Added onClick handler to button
- Added loading state
- Added error/success alerts
- Added validation

---

## 🔧 **Fix 2: Resend OTP Email**

### **Problem:**
The resend endpoint required a full JWT token, but during OTP verification we only have a temp token.

### **Solution:**
Created a special resend endpoint that accepts temp tokens.

### **Backend Changes:**

#### **Added Endpoint** (`otp.controller.ts`):
```typescript
@Post('email/resend')
async resendEmailOtp(@Body() body: { tempToken: string }) {
  try {
    // Verify temp token
    const payload = this.jwtService.verify(body.tempToken);
    
    if (!payload.temp) {
      throw new UnauthorizedException('Invalid token type');
    }

    const userId = payload.userId || payload.sub;
    
    // Send OTP
    return this.otpService.sendEmailOtp(userId);
  } catch (error) {
    throw new UnauthorizedException('Invalid or expired token');
  }
}
```

### **Frontend Changes:**

#### **Updated Resend Handler** (`OtpVerification.tsx`):
```typescript
// OLD - Used wrong endpoint
await axios.post(`${API_URL}/api/otp/email/send`, {}, {
  headers: { Authorization: `Bearer ${tempToken}` }
})

// NEW - Use resend endpoint with temp token
await axios.post(`${API_URL}/api/otp/email/resend`, {
  tempToken
})
```

---

## 📝 **Files Modified:**

### Backend:
1. **`apps/api/src/auth/auth.controller.ts`**
   - Added `change-password` endpoint

2. **`apps/api/src/auth/auth.service.ts`**
   - Added `changePassword()` method

3. **`apps/api/src/otp/otp.controller.ts`**
   - Added `email/resend` endpoint
   - Injected `JwtService`

### Frontend:
1. **`apps/web/src/components/pages/Profile.tsx`**
   - Added password change states
   - Added `handleChangePassword()` handler
   - Updated UI with inputs, validation, alerts

2. **`apps/web/src/components/pages/OtpVerification.tsx`**
   - Updated `handleResendEmail()` to use new endpoint

---

## 🧪 **Testing:**

### **Test Change Password:**
1. ✅ Go to Profile page
2. ✅ Enter current password
3. ✅ Enter new password
4. ✅ Confirm new password
5. ✅ Click "Update Password"
6. ✅ See success message
7. ✅ Logout and login with new password

### **Test Resend OTP:**
1. ✅ Login with email OTP enabled
2. ✅ On OTP page, wait 30 seconds
3. ✅ Click "Resend Code"
4. ✅ Check console for new OTP code
5. ✅ Enter new code
6. ✅ Login successfully

---

## ✨ **What Works Now:**

✅ **Change Password**: Full implementation with validation  
✅ **Resend OTP**: Works with temp token  
✅ **Error Handling**: Proper error messages  
✅ **Success Feedback**: Clear success indicators  
✅ **Loading States**: Shows loading during operations  
✅ **Validation**: Client-side validation before API call  

---

**Both features are now fully functional! Test them out!** 🚀