OpenAI SDK

<?php

namespace wcf\system\event\listener;

use wcf\data\post\Post;
use wcf\data\post\PostAction;
use wcf\data\user\User;
use wcf\system\event\IEventListener;
use wcf\system\language\LanguageFactory;
use wcf\system\WCF;
use wcf\system\openAI\ScOpenAI;

class OpenAIMentionListener implements IEventListener
{
    public function execute($eventObj, $className, $eventName)
    {
        $messageText = $eventObj->message;
        //$userId = WCF::getUser()->userID;
        $userId = WCF::getConfig()->get('openai_user_id');
        $user = new User($userId);
        $username = $user->username;
        $pattern = "/@" . preg_quote($username, '/') . "\s?(.*)/";

        if (preg_match($pattern, $messageText, $matches)) {
            $textFollowingMention = $matches[1];

            $openAIClient = ScOpenAI::getInstance();
            $response = $openAIClient->createChatCompletion([
                'messages' => [
                    ['role' => $userId, 'content' => $textFollowingMention],
                ],
            ]);

            $responseContent = json_decode((string)$response->getBody(), true);
            $openAIResponse = $responseContent['choices'][0]['message']['content'];

            $subject = 'RE: ' . $eventObj->subject;
            $replyData = [
                'subject' => $subject,
                'message' => $openAIResponse,
                'userID' => $userId,
                'username' => $user->username,
                'time' => TIME_NOW,
                'languageID' => LanguageFactory::getInstance()->getDefaultLanguageID(),
            ];

            $reply = new Post(null, $replyData);
            $replyAction = new PostAction([$reply], 'create', ['data' => $replyData]);
            $replyAction->executeAction();
        }
    }
}