feat: disable caching

Author: maximerenou

README.md

@@ -2,9 +2,9 @@
 
 > For now you need to have access to Bing Chat open beta. Or grab the cookie from someone who has access.
 
-This is Composer package for using Bing AI technology.
+This is an unofficial Composer package for using Bing AI technology.
 
-It comes with no warranty of continuous stability, and has been made using reverse engineering.
+It comes with no warranty of continuous stability.
 
 ## Install
 
@@ -50,6 +50,22 @@ $identifiers = $conversation->getIdentifiers();
 $conversation = $ai->createChatConversation($cookie, $identifiers, 1);
 ```
 
+#### Text generation
+
+Note: to prevent answers like "I have already written \[...]", you can disable cache for your prompt with `withoutCache()`.
+
+```php
+$subject = "Internet memes";
+$tone = 'funny';
+$type = 'blog post';
+$length = 'short';
+
+$prompt = new Prompt("Please write a *$length* *$type* in a *$tone* style about `$subject`. Please wrap the $type in a markdown codeblock.");
+
+$conversation->ask($prompt->withoutCache(), ...)
+```
+
 ---------------------------------------
 
-Bing is a trademark of Microsoft. This repository is not official.
+Using Bing AI API outside bing.com may violate Bing AI terms. Use it at your own risk.
+Bing is a trademark of Microsoft.

src/Chat/Conversation.php

@@ -176,18 +176,24 @@ public function handlePacket($raw, $connection, $message, $callback)
                 ]*/
             ];
 
+            $options = [
+                'nlu_direct_response_filter',
+                'deepleo',
+                'enable_debug_commands',
+                'disable_emoji_spoken_text',
+                'responsible_ai_policy_235',
+                'enablemm'
+            ];
+
+            if (! $message->cache) {
+                $options[] = "nocache";
+            }
+
             $params = [
                 'arguments' => [
                     [
                         'source' => 'cib',
-                        'optionsSets' => [
-                            'nlu_direct_response_filter',
-                            'deepleo',
-                            'enable_debug_commands',
-                            'disable_emoji_spoken_text',
-                            'responsible_ai_policy_235',
-                            'enablemm'
-                        ],
+                        'optionsSets' => $options,
                         'allowedMessageTypes' => [
                             'Chat',
                             'InternalSearchQuery',

src/Chat/Prompt.php

@@ -4,6 +4,8 @@
 
 class Prompt
 {
+    public $cache = true;
+
     public $locale;
 
     public $market;
@@ -21,4 +23,10 @@ public function withPreferences($locale = 'en-US', $market = 'en-US', $region =
         $this->region = $region;
         return $this;
     }
+
+    public function withoutCache()
+    {
+        $this->cache = false;
+        return $this;
+    }
 }