# 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 %}

## 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:

```typescript
const identifyUser = () => {
    const user = new NetmeraUser();
    user.userId = <userId>;
    user.email = <email>;
    user.msisdn = <msisdn>;
    user.wpNumber = <whatsappNumber>;

    // Identify user with callback
    Netmera.identifyUser(user, (success, error) => {
      if (success) {
        console.log("User identified successfully")
      } else {
        console.error(error?.message)
      }
    });

    // Identify user without callback
    Netmera.identifyUser(user);
}
```

#### Step 2: Update Profile Attributes

Use `updateUserProfile` to send user details:

```typescript
const sendUserProfileUpdate = () => {
  const userProfile = new NetmeraUserProfile();
  userProfile.name.set('John');
  userProfile.surname.set('Doe');
  userProfile.dateOfBirth.set(new Date().getTime());
  userProfile.gender.set(Gender.MALE);
  userProfile.externalSegments.set(['segment1', 'segment2']);

  // Update user profile with callback
  Netmera.updateUserProfile(userProfile, (success, error) => {
      if (success) {
          ...
        } else {
          ...
        }
  });

  // Update user profile without callback
  Netmera.updateUserProfile(userProfile);
};
```

{% hint style="warning" %}
You should send a **single** user update request at a time.
{% 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 React Native SDK supports four core operations for each profile attribute:

<table><thead><tr><th width="125.3416748046875">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

```typescript
const profile = NetmeraUserProfile();
profile.externalSegments.set(["sports_fans","sports_fans"]);
Netmera.updateUserProfile(profile);
```

**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

```typescript
const profile = NetmeraUserProfile();
profile.externalSegments.add(["black_friday_2025"]);
Netmera.updateUserProfile(profile);
```

**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

```typescript
const profile = NetmeraUserProfile();
profile.externalSegments.remove(["sports_fans"]);
Netmera.updateUserProfile(profile);
```

**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

```typescript
const profile = NetmeraUserProfile();
profile.externalSegments.unset();
Netmera.updateUserProfile(profile);
```

**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.
  {% endhint %}

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

### Fetch Coupon

Fetch coupons using the request/response structure and manager:

```typescript
Netmera.fetchCoupons(0, 10).then(_coupons => {
  console.log(_coupons);
}).catch(error => {
  console.log(error.code, error.message);
});
```

### 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:

```typescript
const emailAllowed = await Netmera.getEmailPermission();
```

* **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**

```typescript
await Netmera.setEmailPermission(true);
```

2. **Disallow Email Subscriptions**

```typescript
await Netmera.setEmailPermission(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:

```typescript
const smsAllowed = await Netmera.getSmsPermission();
```

**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**

```typescript
await Netmera.setSmsPermission(true);
```

2. **Disallow SMS Subscriptions**

```typescript
await Netmera.setSmsPermission(false);
```

These methods enable you to respect user preferences for SMS 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.

#### Check WhatsApp Subscription Status

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

```typescript
const whatsAppAllowed = await Netmera.getWhatsAppPermission();
```

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

#### Update WhatsApp Subscription Preference

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

1. **Allow WhatsApp Subscriptions**

```typescript
await Netmera.setWhatsAppPermission(true);
```

2. **Disallow WhatsApp Subscriptions**

```typescript
await Netmera.setWhatsAppPermission(false);
```

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


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