Merge pull request #57 from bashar94/main

added chatgpt (chat-completions) API

README.md

@@ -419,6 +419,26 @@ $classification = $open_ai->classification([
 ]);
 ```
 
+## Chat
+
+Given a chat conversation, the model will return a chat completion response.
+
+ ```php
+$complete = $open_ai->chat([
+    'model' => 'gpt-3.5-turbo',
+    'messages' => [
+        [
+            "role" => "user", 
+            "content" => "Hello!"
+        ]
+    ],
+    'temperature' => 1.0,
+    'max_tokens' => 4096,
+    'frequency_penalty' => 0,
+    'presence_penalty' => 0,
+]);
+```
+
 ## Content Moderations
 
 Given a input text, outputs if the model classifies it as violating OpenAI's content policy.

src/OpenAi.php

@@ -8,6 +8,7 @@ class OpenAi
 {
     private string $engine = "davinci";
     private string $model = "text-davinci-002";
+    private string $chatModel = "gpt-3.5-turbo";
     private array $headers;
     private array $contentTypes;
     private int $timeout = 0;
@@ -200,6 +201,32 @@ public function moderation($opts)
         return $this->sendRequest($url, 'POST', $opts);
     }
 
+
+    /**
+     * @param $opts
+     * @param null $stream
+     * @return bool|string
+     * @throws Exception
+     */
+    public function chat($opts, $stream = null)
+    {
+        if ($stream != null && array_key_exists('stream', $opts)) {
+            if (! $opts['stream']) {
+                throw new Exception(
+                    'Please provide a stream function. Check https://github.com/orhanerday/open-ai#stream-example for an example.'
+                );
+            }
+
+            $this->stream_method = $stream;
+        }
+
+        $opts['model'] = $opts['model'] ?? $this->chatModel;
+        $url = Url::chatUrl();
+        $this->baseUrl($url);
+
+        return $this->sendRequest($url, 'POST', $opts);
+    }
+
     /**
      * @param $opts
      * @return bool|string

src/Url.php

@@ -133,4 +133,13 @@ public static function embeddings(): string
     {
         return self::OPEN_AI_URL . "/embeddings";
     }
+
+    /**
+     * @param
+     * @return string
+     */
+    public static function chatUrl(): string
+    {
+        return self::OPEN_AI_URL . "/chat/completions";
+    }
 }

tests/OpenAiTest.php

@@ -227,3 +227,22 @@
 
     $this->assertStringContainsString('data', $result);
 })->group('working');
+
+
+it('should handle simple chat completion using the new endpoint', function () use ($open_ai) {
+    $result = $open_ai->chat([
+        'model' => 'gpt-3.5-turbo',
+        'messages' => [
+            [
+                "role" => "user",
+                "content" => "Hello!"
+            ]
+        ],
+        'temperature' => 0.9,
+        "max_tokens" => 150,
+        "frequency_penalty" => 0,
+        "presence_penalty" => 0,
+    ]);
+
+    $this->assertStringContainsString('text', $result);
+})->group('working');