# User & Attributes

### Managing User Data

The `NetmeraUser` class allows you to send structured information about your application's users to Netmera. The ideal time to update user attributes is **right after the user logs into your application.**

{% hint style="warning" %}
**User ID Management**

For optimal performance and data integrity:

* **Update user information at login**: It’s crucial to update the user information as soon as the user logs in.
* **Unique userId**: Ensure that each user has a unique `userId`. Assigning the same `userId` to multiple users leads to data inconsistencies and is not recommended.
  {% endhint %}

### SDK v4.5.0 Update: User Management Changes <a href="#sdk-v4.4.0-update-user-management-changes" id="sdk-v4.4.0-update-user-management-changes"></a>

As of version **v4.5.0**, the `updateUser` method has been **deprecated**. Use the following methods instead:

* `identifyUser`: Sets or updates identifiers such as `userId`, `email`, and `msisdn`.
* `updateUserProfile`: Updates user profile attributes like name, gender, birthday, occupation, etc.

### Updating User Information <a href="#updating-user-information" id="updating-user-information"></a>

**Step 1: Identify the User**

Use `identifyUser` after the user logs in:

```swift
let user = NetmeraUserIdentify()
user.userId = userId
user.email = email
user.msisdn = msisdn
Netmera.identifyUser(user)
```

**Step 2: Update Profile Attributes**

Use `updateUserProfile` to send user details:

```swift
let user = NetmeraUserProfile()
user.name.set("Muhammad Ali")
user.surname.set("Clay")
user.externalSegments.set(["sports", "boxing"])
user.gender.set(.male)
user.maritalStatus.set(.married)
user.numberOfChildren.set(9)
user.country.set("USA")
user.state.set("Kentucky")
user.city.set("Louisville")
user.district.set("West End")
user.occupation.set("Professional Boxer")
user.industry.set("Sports")
user.favoriteTeam.set("favoriteTeam")
user.language.set("English")
user.dateOfBirth.set(Date(timeIntervalSince1970: -915148800))
Netmera.updateUserProfile(userProfile: user)
```

{% hint style="warning" %}
**Important Notes**

* You should send a **single** user update request at a time.
* Do not use `updateUser`—it is deprecated and replaced by the two methods above.
  {% endhint %}

### Managing attributes with `set`, `add`, `remove`, and `unset` <a href="#managing-attributes-with-set-add-remove-and-unset" id="managing-attributes-with-set-add-remove-and-unset"></a>

The Netmera SDK supports four core operations for each profile attribute:

<table><thead><tr><th width="107.6329345703125">Operation</th><th>Description</th><th>Data Type</th></tr></thead><tbody><tr><td><code>set()</code></td><td>Completely replaces the profile attribute</td><td>Available for all data types</td></tr><tr><td><code>unset()</code></td><td>Completely deletes the profile attribute</td><td>Available for all data types</td></tr><tr><td><code>add()</code> </td><td>Adds new element(s) to the profile attribute</td><td>Available only for Array-type attributes</td></tr><tr><td><code>remove()</code></td><td>Removes specified element(s) from the profile attribute</td><td>Available only for Array-type attributes</td></tr></tbody></table>

{% hint style="success" %}
For profile attributes defined as arrays, you do not need to manage the entire list at once. You can update them incrementally using `add()` and `remove()`.
{% endhint %}

In the following examples, we use `externalSegments`, which is a predefined array-type profile attribute in the Netmera platform. However, you are free to define and use your own custom profile attributes as needed.

### 1. `set()` – Create List from Scratch

```swift
let user = MyNetmeraUser()
user.externalSegments.set(["sports_fans","sports_fans"])
Netmera.updateUserProfile(userProfile: user)
```

**Explanation:** This operation clears any existing values in the `externalSegments` field and assigns the new list containing `"sports_fans"` and `"sports_fans"`. Only the provided segments will be retained.

**Use case:** Reinitializing the user's profile with a new segment configuration.

### 2. `add()` – Add New Elements

```swift
let user = MyNetmeraUser()
user.externalSegments.add(["black_friday_2025"])
Netmera.updateUserProfile(userProfile: user)
```

**Explanation:** Preserves existing values in the `externalSegments` list and appends the new segment `"black_friday_2025"`.

**Use case:** Temporarily adding a user to a campaign-specific segment.

### 3. `remove()` – Remove Elements

```swift
let user = MyNetmeraUser()
user.externalSegments.remove(["sports_fans"])
Netmera.updateUserProfile(userProfile: user)
```

**Explanation:** Removes the `"sports_fans"` value from the user's `externalSegments` list. Other segment values remain unchanged.

**Use case:** Reflecting changes in user interests or preferences.

### 4. `unset()` – Clear All Data

```swift
let user = MyNetmeraUser()
user.externalSegments.unset()
Netmera.updateUserProfile(userProfile: user)
```

**Explanation:** Clears all data from the `externalSegments` field. The user will no longer be associated with any segment.

**Use case:** When a user account is closed or profile data needs to be reset.

### Creating Custom Profile Attributes&#x20;

#### Step 1: Navigate to the Developers section

Custom profile attributes must be created and configured in the Netmera Panel before they can be used in the application.&#x20;

* Go to **Panel** > **Developers > Profile Attributes > Create New Attribute.**

#### Step 2: Fill in Attribute Details

Define the following information:

* **Name**: The unique identifier for the attribute.
* **Label**: A user-friendly name for the attribute.
* **Description**: A brief description of the attribute.
* **Data Type**: Choose the appropriate data type for the attribute.
* **Is Array**: Define whether the attribute can hold multiple values.

#### Step 3: Save the Attribute

After clicking **Save**, the custom attribute will be available for assignment to your users.

#### Step 4: Generated Code for Custom Attributes

Once the attribute is defined in the Netmera Panel, the generated code can be found at the bottom of the **Profile Attribute** page, under the **Generate Code** section. This code must be added to your Netmera Panel under **Profile Attributes > User Class**.

{% hint style="info" %}
**Private Information Considerations**

Under the **KVKK** law, the sharing of private user data is prohibited. To ensure compliance:

* **Private Information Flag**: When defining profile attributes or events, the **Private Information** feature must be selected to ensure that these attributes are not sent to the backend by the Netmera SDK.
* **SDK Enforcement**: The SDK checks for the **Private Information** flag during the `Netmera.updateUser(user:)` call. If the flag is set, the request will not be sent to the backend.
  {% endhint %}

<figure><img src="/files/QoRtHFanKtmtxa35m4Po" alt=""><figcaption></figcaption></figure>

### Fetch Coupon

Fetch coupons using the request/response structure and manager:

```swift
let filter = NetmeraCouponFilter(page: 1, max: 10)

Netmera.fetchCoupons(using: filter) { result in
    switch result {
    case .success(let coupons):
        print("Coupons fetched: \(coupons)")
    case .failure(let error):
        print("Error fetching coupons: \(error)")
    }
}
```

### Email Subscription Preferences

The Netmera SDK provides methods to manage email subscription preferences for your users.&#x20;

#### Check Email Subscription Status

Use the following method to check if the user has allowed email subscriptions:

```swift
Netmera.getEmailPermission { [weak self] result in
    DispatchQueue.main.async {
        switch result {
        case .success(let isEmailAllowed):
            self?.updateEmailToggle(isOn: isEmailAllowed)
        case .failure(let error):
            print("Failed to get email permission: \(error)")
        }
    }
}
```

* **Returns**: A `Boolean` value (`true` if the user has allowed email subscriptions, otherwise `false`).

#### Update Email Subscription Preferences

Set the user's preference for email subscriptions using one of the methods below:

1. **Allow Email Subscriptions**

```swift
Netmera.setEmailPermission(isAllowed: true)
```

2. **Disallow Email Subscriptions**

```swift
Netmera.setEmailPermission(isAllowed: false)
```

These methods enable you to respect user preferences for email communications within your application.

### SMS Subscription Preferences

The Netmera SDK provides methods to manage SMS subscription preferences for your users.&#x20;

#### Check SMS Subscription Status

Use the following method to check if the user has allowed SMS subscriptions:

```swift
Netmera.getSmsPermission { [weak self] result in
    DispatchQueue.main.async {
        switch result {
        case .success(let isSmsAllowed):
            self?.updateSmsToggle(isOn: isSmsAllowed)
            
        case .failure(let error):
            print("Failed to get SMS permission: \(error)")
        }
    }
}
```

**Returns**: A `Boolean` value (`true` if the user has allowed SMS subscriptions, otherwise `false`).

#### Update SMS Subscription Preferences

Set the user's preference for SMS subscriptions using one of the methods below:

1. **Allow SMS Subscriptions**

```swift
Netmera.setSmsPermission(isAllowed: true)
```

2. **Disallow SMS Subscriptions**

```swift
Netmera.setSmsPermission(isAllowed: false)
```

These methods enable you to respect user preferences for email communications within your application.

### WhatsApp Subscription Preferences

Use these APIs to check or update whether the user allows receiving WhatsApp messages. This permission controls eligibility for WhatsApp-based campaigns.

#### Update WhatsApp Subscription Preference

```swift
Netmera.setWhatsAppPermission(isAllowed: true)
Netmera.setWhatsAppPermission(isAllowed: false)
```

#### Check WhatsApp Subscription Status

```swift
Netmera.getWhatsAppPermission { result in
    self.whatsAppPermission = try? result.get()
}
```

**Returns:**\
`true` → The user allows WhatsApp messages\
`false` → The user does not allow WhatsApp messages


---

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