[feat] use model dropdown for picking a model

Author: srcnalt

Runtime/OllamaApiTest.cs

@@ -6,14 +6,22 @@ public class OllamaApiTest : MonoBehaviour
 {
     [SerializeField] private NeocortexChatPanel chatPanel;
     [SerializeField] private NeocortexTextChatInput chatInput;
+    [SerializeField] private OllamaModelDropdown modelDropdown;
 
     private OllamaRequest request;
 
     void Start()
     {
         request = new OllamaRequest();
         request.OnChatResponseReceived += OnChatResponseReceived;
+        request.ModelName = modelDropdown.options[0].text;
         chatInput.OnSendButtonClicked.AddListener(OnUserMessageSent);
+        modelDropdown.onValueChanged.AddListener(OnDropdownValueChanged);
+    }
+
+    private void OnDropdownValueChanged(int index)
+    {
+        request.ModelName = modelDropdown.options[index].text;
     }
 
     private void OnChatResponseReceived(ChatResponse response)

Runtime/OllamaRequest.cs

@@ -8,13 +8,19 @@
 public class OllamaRequest : WebRequest
 {
     private const string BASE_URL = "http://localhost:11434/api/chat";
+
+    private readonly List<Message> messages = new ();
 
+    public string ModelName { get; set; }
     public event Action<ChatResponse> OnChatResponseReceived;
-    
-    private readonly List<Message> messages = new List<Message>();
-    
+
     public async void Send(string input)
     {
+        if (string.IsNullOrEmpty(ModelName))
+        {
+            throw new Exception("ModelName property is not set.");
+        }
+        
         Headers = new Dictionary<string, string>()
         {
             { "Content-Type", "application/json" },
@@ -24,7 +30,7 @@ public async void Send(string input)
 
         var data = new
         {
-            model = "llama3.2:3b",
+            model = ModelName,
             messages = messages.ToArray(),
             stream = false
         };