Add chat completion feature

README.md

@@ -43,6 +43,23 @@ $response = Ollama::agent('You are a weather expert...')
     ->ask();
 ```
 
+### Chat completion
+
+```php
+$messages = [
+    ['role' => 'user', 'content' => 'My name is Toni Soriano and I live in Spain'],
+    ['role' => 'assistant', 'content' => 'Nice to meet you , Toni Soriano'],
+    ['role' => 'user', 'content' => 'where I live ?'],
+];
+
+$response = Ollama::agent('You know me really well!')
+    ->model('llama2')
+    ->chat($messages);
+
+// "You mentioned that you live in Spain."
+
+```
+
 ### Show Model Information
 
 ```php

src/Ollama.php

@@ -12,15 +12,67 @@ class Ollama
 {
     use MakesHttpRequests;
 
+    /**
+     * modelService
+     *
+     * @var mixed
+     */
     protected $modelService;
+
+    /**
+     * selectedModel
+     *
+     * @var mixed
+     */
     protected $selectedModel;
 
+    /**
+     * model
+     *
+     * @var mixed
+     */
     protected $model;
+
+    /**
+     * prompt
+     *
+     * @var mixed
+     */
     protected $prompt;
+
+    /**
+     * format
+     *
+     * @var mixed
+     */
     protected $format;
+
+    /**
+     * options
+     *
+     * @var mixed
+     */
     protected $options;
+
+    /**
+     * stream
+     *
+     * @var bool
+     */
     protected $stream = false;
+
+    /**
+     * raw
+     *
+     * @var mixed
+     */
     protected $raw;
+
+    /**
+     * agent
+     *
+     * @var mixed
+     */
     protected $agent;
 
     /**
@@ -203,4 +255,21 @@ public function ask()
             'raw' => $this->raw,
         ]);
     }
+
+    /**
+     * Generates a chat completion using the specified model and conversation.
+     *
+     * @param array $conversation
+     * @return array
+     */
+    public function chat(array $conversation)
+    {
+        return $this->sendRequest('/api/chat', [
+            'model' => $this->model,
+            'messages' => $conversation,
+            'format' => $this->format,
+            'options' => $this->options,
+            'stream' => $this->stream,
+        ]);
+    }
 }