From 4880f468eb6cec95d717b478fd6bdab3e58399cf Mon Sep 17 00:00:00 2001
From: Luchunpen <anidorybp@gmail.com>
Date: Mon, 20 Mar 2023 17:20:45 +0300
Subject: [PATCH] Update OpenAIUtil.cs

Update UnityWebRequest for earlier Unity versions
---
 Assets/Editor/OpenAIUtil.cs | 102 +++++++++++++++++++++++-------------
 1 file changed, 67 insertions(+), 35 deletions(-)

diff --git a/Assets/Editor/OpenAIUtil.cs b/Assets/Editor/OpenAIUtil.cs
index b831b80..57d10bf 100644
--- a/Assets/Editor/OpenAIUtil.cs
+++ b/Assets/Editor/OpenAIUtil.cs
@@ -1,52 +1,84 @@
+using System.Text;
 using UnityEngine;
 using UnityEditor;
 using UnityEngine.Networking;
 
-namespace AIShader {
-
-static class OpenAIUtil
+namespace AIShader 
 {
-    static string CreateChatRequestBody(string prompt)
+
+    static class OpenAIUtil
     {
-        var msg = new OpenAI.RequestMessage();
-        msg.role = "user";
-        msg.content = prompt;
+        static string CreateChatRequestBody(string prompt)
+        {
+            var msg = new OpenAI.RequestMessage();
+            msg.role = "user";
+            msg.content = prompt;
 
-        var req = new OpenAI.Request();
-        req.model = "gpt-3.5-turbo";
-        req.messages = new [] { msg };
+            var req = new OpenAI.Request();
+            req.model = "gpt-3.5-turbo";
+            req.messages = new [] { msg };
 
-        return JsonUtility.ToJson(req);
-    }
+            return JsonUtility.ToJson(req);
+        }
 
-    public static string InvokeChat(string prompt)
-    {
-        // POST
-        using var post = UnityWebRequest.Post
-          (OpenAI.Api.Url, CreateChatRequestBody(prompt), "application/json");
+        private static UnityWebRequest CreateApiRequest(string url, object body)
+        {
 
-        // API key authorization
-        post.SetRequestHeader
-          ("Authorization", "Bearer " + AIShaderSettings.instance.apiKey);
+#if UNITY_2022_2_OR_NEWER
 
-        // Request start
-        var req = post.SendWebRequest();
+         var request = UnityWebRequest.Post(OpenAI.Api.Url, CreateChatRequestBody(prompt), "application/json");
+         return request;
+#else
 
-        // Progress bar (Totally fake! Don't try this at home.)
-        for (var progress = 0.0f; !req.isDone; progress += 0.01f)
-        {
-            EditorUtility.DisplayProgressBar
-              ("AI Shader Importer", "Generating...", progress);
-            System.Threading.Thread.Sleep(100);
-            progress += 0.01f;
+            string bodyString = null;
+            if (body is string)
+            {
+                bodyString = (string)body;
+            }
+            else if (body != null)
+            {
+                bodyString = JsonUtility.ToJson(body);
+            }
+
+            var request = new UnityWebRequest();
+            request.url = url;
+            request.method = "POST";
+            request.downloadHandler = new DownloadHandlerBuffer();
+            request.uploadHandler = new UploadHandlerRaw(string.IsNullOrEmpty(bodyString) ? null : Encoding.UTF8.GetBytes(bodyString));
+            request.SetRequestHeader("Accept", "application/json");
+            request.SetRequestHeader("Content-Type", "application/json");
+            request.timeout = 60;
+            return request;
+#endif
         }
-        EditorUtility.ClearProgressBar();
 
-        // Response extraction
-        var json = post.downloadHandler.text;
-        var data = JsonUtility.FromJson<OpenAI.Response>(json);
-        return data.choices[0].message.content;
+        public static string InvokeChat(string prompt)
+        {
+            // POST
+            using var post = CreateApiRequest(OpenAI.Api.Url, CreateChatRequestBody(prompt));
+
+            // API key authorization
+            post.SetRequestHeader
+              ("Authorization", "Bearer " + AIShaderSettings.instance.apiKey);
+
+            // Request start
+            var req = post.SendWebRequest();
+
+            // Progress bar (Totally fake! Don't try this at home.)
+            for (var progress = 0.0f; !req.isDone; progress += 0.01f)
+            {
+                EditorUtility.DisplayProgressBar
+                  ("AI Shader Importer", "Generating...", progress);
+                System.Threading.Thread.Sleep(100);
+                progress += 0.01f;
+            }
+            EditorUtility.ClearProgressBar();
+
+            // Response extraction
+            var json = post.downloadHandler.text;
+            var data = JsonUtility.FromJson<OpenAI.Response>(json);
+            return data.choices[0].message.content;
+        }
     }
-}
 
 } // namespace AIShader