# Case & Topic

### Get Available Topics

You can get the list of available topics by calling **`getTopicList`**.

{% tabs %}
{% tab title="Java" %}
{% code title="YourActivity.java" %}

```java
import io.taptalk.taptalklive.TapTalkLive;
import io.taptalk.taptalklive.Listener.TTLGetTopicListListener;
import io.taptalk.taptalklive.API.Model.TTLTopicModel;

...

TapTalkLive.getTopicList(new TTLGetTopicListListener() {
    @Override
    public void onSuccess(List<TTLTopicModel> topics) {
        // Successfully fetched topics
    }

    @Override
    public void onError(String errorCode, String errorMessage) {
        
    }
});
```

{% endcode %}
{% endtab %}

{% tab title="Kotlin" %}
{% code title="YourActivity.kt" %}

```kotlin
import io.taptalk.taptalklive.TapTalkLive
import io.taptalk.taptalklive.Listener.TTLGetTopicListListener
import io.taptalk.taptalklive.API.Model.TTLTopicModel

...

TapTalkLive.getTopicList(object : TTLGetTopicListListener() {
    override fun onSuccess(topics: MutableList<TTLTopicModel>?) {
        // Successfully fetched topics
    }
    override fun onError(errorCode: String?, errorMessage: String?) {

    }
})
```

{% endcode %}
{% endtab %}
{% endtabs %}

### Get Active User's Case List

To use this method, you need to first finish [authentication](https://docs.taptalk.io/onetalk-omnichannel-documentation/onetalk-channel-integration/live-chat/authentication#authenticate-user-optional) process.

Once authenticated, you can obtain the active user's case list by calling **`getUserCaseList`**.

{% tabs %}
{% tab title="Java" %}
{% code title="YourActivity.java" %}

```java
import io.taptalk.taptalklive.TapTalkLive;
import io.taptalk.taptalklive.Listener.TTLGetCaseListListener;
import io.taptalk.taptalklive.API.Model.TTLCaseModel;

...

TapTalkLive.getUserCaseList(new TTLGetCaseListListener() {
    @Override
    public void onSuccess(List<TTLCaseModel> cases) {
        // Successfully fetched user cases
    }

    @Override
    public void onError(String errorCode, String errorMessage) {
        
    }
});
```

{% endcode %}
{% endtab %}

{% tab title="Kotlin" %}
{% code title="YourActivity.kt" %}

```kotlin
import io.taptalk.taptalklive.TapTalkLive
import io.taptalk.taptalklive.Listener.TTLGetCaseListListener
import io.taptalk.taptalklive.API.Model.TTLCaseModel

...

TapTalkLive.getUserCaseList(object : TTLGetCaseListListener() {
    override fun onSuccess(cases: MutableList<TTLCaseModel>?) {
        // Successfully fetched user cases
    }
    override fun onError(errorCode: String?, errorMessage: String?) {

    }
})
```

{% endcode %}
{% endtab %}
{% endtabs %}

### Create a New Case

To use this method, you need to first finish [authentication](https://docs.taptalk.io/onetalk-omnichannel-documentation/onetalk-channel-integration/live-chat/authentication#authenticate-user-optional) process.

Once authenticated, you can create a new case for the user by calling **`createNewCase`**, providing the **topic ID** and **first message**.

{% tabs %}
{% tab title="Java" %}
{% code title="YourActivity.java" %}

```java
import io.taptalk.taptalklive.TapTalkLive;
import io.taptalk.taptalklive.Listener.TTLCreateCaseListener;
import io.taptalk.taptalklive.API.Model.TTLCaseModel;

...

TapTalkLive.createNewCase(TOPIC_ID, FIRST_MESSAGE, new TTLCreateCaseListener() {
    @Override
    public void onSuccess(TTLCaseModel caseModel) {
        // Successfully created a new case
    }

    @Override
    public void onError(String errorCode, String errorMessage) {
        
    }
});
```

{% endcode %}
{% endtab %}

{% tab title="Kotlin" %}
{% code title="YourActivity.kt" %}

```kotlin
import io.taptalk.taptalklive.TapTalkLive
import io.taptalk.taptalklive.Listener.TTLCreateCaseListener
import io.taptalk.taptalklive.API.Model.TTLCaseModel

...

TapTalkLive.createNewCase(TOPIC_ID, FIRST_MESSAGE, object : TTLCreateCaseListener() {
    override fun onSuccess(caseModel: TTLCaseModel?) {
        // Successfully created a new case
    }
    override fun onError(errorCode: String?, errorMessage: String?) {

    }
})
```

{% endcode %}
{% endtab %}
{% endtabs %}

{% hint style="info" %}
**Parameters**\
\&#xNAN;**`TOPIC_ID`**: (int) ID of the selected topic, can be obtained from [**`getTopicList`**](#get-available-topics)\
\&#xNAN;**`FIRST_MESSAGE`**: (String) message to be sent by the user to start a case
{% endhint %}