juhe-it-solutions/contao-openai-assistant

OpenAI Responses API integration for Contao CMS

v2.0.2 2026-07-01 14:14 UTC

Requires

• php: ^8.2
• contao/core-bundle: ^5.3@dev
• symfony/http-client: ^6.4 || ^7.0

Requires (Dev)

• contao/easy-coding-standard: ^6.13
• phpstan/phpstan: ^2.0

LGPL-3.0-or-later

• JUHE IT-solutions

• contao
• assistant
• ai
• chatbot
• openai

Published on Packagist.org on 2026-07-01 14:14 UTC

README

About

juhe-it-solutions/contao-openai-assistant is a comprehensive OpenAI integration for Contao 5.3+ providing backend management and a modern frontend chatbot. Developed and maintained by JUHE IT-solutions, Austria.

This extension allows you to create, configure, and deploy AI chat experiences directly within your Contao CMS, with secure API key management, file uploads, and a customizable frontend chat widget. It is built on top of the official OpenAI Responses API and the Conversations API for state management, replacing the legacy Assistants API (which is being sunset by OpenAI in August 2026).

⚠️ Upgrading from 1.x? Version 2.0 is a breaking change: the extension no longer calls the OpenAI Assistants API (/v1/assistants, /v1/threads). Any OpenAI Assistants that were created by older versions of this extension are automatically cleaned up from the OpenAI platform by a one-shot migration on upgrade. See the CHANGELOG and Upgrading from 1.x section.

🎉 A Quick Note from the Developer

Hey folks! 👋 This whole project is my first attempt at completely vibing with Contao extension development (crafted in countless nights fueled by coffee ☕ and determination 💪).

While I'm super proud of what we've built here, I gotta be honest - I don't have the bandwidth to actively maintain this project.

Feel free to:

• 🐛 Create issues (bugs, feature requests, whatever!)
• 🔧 Submit pull requests
• 💡 Suggest improvements
• ⭐ Give it a star if you find it useful
• ☕ Buy me a coffee if this extension helps you out!

No guarantees that everything will be addressed immediately, but I'll take a look when time allows! Since this is open source, feel free to fork and enhance it! 🎯

🚀 Features

Backend Management

• OpenAI Configuration Management: Secure API key storage and validation
• Prompt Creation & Management: Create and configure prompts (name, model, instructions, parameters) used with the Responses API. Optionally reference a dashboard-managed Prompt (prompt_id / prompt_version) to override local instructions
• File Upload & Management: Upload and manage files for the prompt's knowledge base (File Search tool)
• Vector Store Integration: Automatic creation and management of OpenAI vector stores
• Model Selection: Fast loading of all available OpenAI models with save-time validation via the Responses API
• Parameter Configuration: Fine-tune temperature, top_p, and max_output_tokens

Frontend Chatbot

• Responsive Chat Interface: Modern, accessible chat widget
• Theme Support: Light and dark theme with customizable colors
• Positioning Options: Multiple chat widget positions (bottom-right, bottom-left, etc.)
• Session Management: Persistent conversations via the OpenAI Conversations API
• CSRF Protection: Built-in security with CSRF token validation
• Accessibility: ARIA labels and keyboard navigation support
• Disclaimer Feature: Configurable disclaimer text with information icon in chat header

Security & Performance

• API Key Encryption: Secure storage of OpenAI API keys (AES-256-CBC) with optional environment-variable override
• Rate Limiting: Built-in protection against abuse
• Error Handling: Comprehensive error logging and user feedback
• Session Management: Conversation-based persistence (server-side state on OpenAI)

📋 Requirements

• Contao: 5.3 or higher (tested with Contao 5.5)
• PHP: 8.2 or higher
• OpenAI API Key: Valid OpenAI API key with access to the Responses API, Conversations API, Files API, and Vector Stores
• Composer: For installation and dependency management

🚀 Quick Start

🛠️ Installation using Contao Manager

The extension can easily be installed using the Contao Manager. Just search for the extension with keywords 'openai', 'openai-assistant', 'chatbot',...

🛠️ Installation using composer

For detailed installation instructions, see docs/installation.md.

1. Install the extension:

composer require juhe-it-solutions/contao-openai-assistant

1. Run migrations and clear cache:

php bin/console contao:migrate
php bin/console cache:clear

1. Configure in Contao backend:

   • Go to AI-TOOLS → OpenAI Dashboard
   • Create OpenAI configuration with your API key
   • Upload knowledge base files
   • Create your first prompt

2. Add to frontend:

   • Create AI-Chatbot module in Layout → Modules
   • Add module to your page layout

📚 For detailed documentation, see the docs/ directory.

Manual Installation (Alternative)

If you prefer manual installation:

1. Download the extension:

git clone https://github.com/juhe-it-solutions/contao-openai-assistant.git

1. Copy to your Contao installation:

cp -r contao-openai-assistant vendor/juhe-it-solutions/contao-openai-assistant/

1. Add to composer.json (if not using Composer):

{
  "autoload": {
    "psr-4": {
      "JuheItSolutions\\ContaoOpenaiAssistant\\": "vendor/juhe-it-solutions/contao-openai-assistant/src/"
    }
  }
}

1. Run migrations and clear cache:

php bin/console contao:migrate
php bin/console cache:clear

🎯 How to Setup

Prerequisites

Before setting up the extension, you need:

1. OpenAI Account: Create an account at platform.openai.com
2. Create Project: e.g. Chatbot for website xyz
3. API Key: Generate a secret key in your OpenAI project
4. Responses API Access: Ensure your account has access to the Responses API (the default for modern OpenAI accounts)
5. Contao 5.3+: Ensure you're running Contao 5.3 or higher (recommended: Contao 5.5)

Step-by-Step Setup Guide

1. Backend Configuration

After installing the extension via Contao Manager, you will see a new entry in your Contao backend main menu: AI-TOOLS → OpenAI Dashboard. Click on this link to access the configuration area.

1a. Create OpenAI Configuration

• Click "New configuration"
• Enter your OpenAI API key/Secret key and press button "Validate key"
• Save the configuration
• The system will automatically validate your API key

1b. Upload Knowledge Base Files

• Click the 3rd icon "File Upload"
• Click "New file"
• Choose files containing website-/company information or other data the chatbot should rely on
• Supported formats: PDF, TXT, MD, DOCX, PPTX, JSON

1c. Create OpenAI Prompt

• In the overview page, click the 4th icon "Prompts"
• Click "Create OpenAI Prompt"
• Configure your prompt:
  • Name and Description: Give your prompt a meaningful name
  • System Instructions: Define how the chatbot should behave and respond
  • Model Selection: Choose from all available OpenAI models (fast loading, validation on save via the Responses API)
  • Parameters: Adjust temperature, top_p, and max_output_tokens as needed
  • Optional Prompt ID: If you maintain a Prompt in the OpenAI dashboard (under "Prompts"), you can paste its prompt_id (and optionally a prompt_version) here. When set, the dashboard-managed prompt takes precedence over the local System Instructions

2. Frontend Module Configuration

2a. Create AI Chat Module

• Navigate to Themes → Frontend Modules
• Click "New module"
• Select module type "AI tools → AI-Chatbot"

2b. Configure Chatbot Settings

• Chat Position: Choose widget position (bottom-right, bottom-left, etc.)
• Initial State: Collapsed or expanded
• Theme: Light or dark mode
• Colors: Customize all theme colors (background, text, buttons)
• Font Size: Adjustable base font size (12px to 20px)
• Messages: Set custom titles and welcome messages for the frontend chatbot

3. Integration

3a. Page Layout Integration

• Go to Layout → Page Layout
• Select your desired page layout
• Add the newly created AI-Chatbot module to the layout

3b. Content Element Integration (Alternative)

• Create a new content element
• Choose "Module" as the element type
• Select your AI-Chatbot module

🔄 How It Works (Real-World Process)

Behind the Scenes

When you configure the extension in Contao, the following happens:

1. OpenAI Project Setup

• Vector Store Creation: A vector store is automatically created in your OpenAI project under "Storage"
• File Processing: Uploaded files are processed and stored in the vector store
• Prompt Configuration: Prompts are stored locally in the Contao database (tl_openai_prompts). There is no remote "Assistant" object anymore — configuration (model, instructions, parameters) is sent to OpenAI on every POST /v1/responses call

2. Conversation & State Management

• Conversations API: For every new chat session, a conversation is created via POST /v1/conversations. Its id is stored in the user's PHP session
• Responses API: Each user message is delivered to POST /v1/responses, attaching the conversation id, the prompt configuration, and the File Search tool (if a vector store is configured)
• Server-Side History: OpenAI keeps the conversation items; the extension retrieves them via GET /v1/conversations/{id}/items to rehydrate the chat on page reload

3. File Management

• Upload Processing: Files uploaded in Contao are automatically sent to OpenAI
• Vector Store Integration: Files are indexed and made available to the File Search tool
• Knowledge Base: The model can reference uploaded files when responding to users

4. Prompt Configuration

• System Instructions: Your defined instructions are passed as the instructions parameter on each Responses API call
• Dashboard Prompt (optional): If a prompt_id is set, the extension sends a prompt reference instead of local instructions
• Model Selection: The chosen model is validated via a minimal POST /v1/responses ping on save
• Parameters: temperature, top_p, and max_output_tokens are applied per request

Prompt Modes (Important)

• Mode A (default, local): Create/edit the prompt in Contao backend; it is used for every chat turn.
• Mode B (dashboard template): Create prompt in OpenAI dashboard (Create -> Chat) and paste prompt_id (+ optional version) in Contao. When prompt_id is set, local System Instructions are ignored; model and sampling/token settings from Contao are still applied.

Important Notes

⚠️ Hybrid Ownership:

• Prompts, files, and configurations live in the Contao database — they are the source of truth for the extension
• Vector stores and uploaded files live on the OpenAI platform and are created/deleted on demand
• Dashboard-managed "Prompts" (optional, via prompt_id) live in your OpenAI project and can be edited independently

🔎 How to verify on OpenAI dashboard:

• Go to Logs -> Responses and Logs -> Conversations and send a test chat message.
• Open a response entry to inspect effective config (model, max output tokens, temperature, top_p, instructions/prompt reference).
• For upgraded installations, legacy assistant cleanup can be checked in Assistants.

🔒 Security: 🌐 Web Root Detection:

• The bundle resolves file system paths using the configured Contao web directory parameter %contao.web_dir%.

• If %contao.web_dir% is absolute (e.g., /var/www/project/public), it is used directly. If it is relative (e.g., public), it will be prefixed with %kernel.project_dir%.

• This prevents "File not found" errors on instances with custom document roots.

• API keys are securely stored and encrypted

• All communications with OpenAI use HTTPS

• No sensitive data is logged or exposed

⚙️ Configuration

API Key Management

The extension supports multiple methods for storing OpenAI API keys:

• Environment Variables (Recommended): Store keys in .env.local or system environment
• Encrypted Database: Fallback with AES-256-CBC encryption
• Real-time Validation: Keys validated with OpenAI on save

📖 For detailed API key management, see docs/security/api-key-management.md

Color Customization

The extension supports full color customization for both light and dark themes:

• Background Colors: Primary and secondary backgrounds
• Text Colors: Primary and secondary text colors
• Toggle Icon Colors: Custom colors for the theme toggle button
• Font Size: Adjustable base font size (12px to 20px)

🎨 Frontend Features

Chat Widget

The frontend chat widget provides:

• Responsive Design: Works on all device sizes
• Theme Toggle: Switch between light and dark themes
• Minimize/Maximize: Collapsible chat interface
• Real-time Responses: Live responses streamed from the OpenAI Responses API
• Message History: Persistent conversations via the OpenAI Conversations API
• Loading States: Visual feedback during processing

Accessibility

• ARIA Labels: Screen reader support
• Keyboard Navigation: Full keyboard accessibility
• Focus Management: Proper focus handling
• High Contrast: Support for high contrast themes

🔧 API Endpoints

The extension provides several API endpoints:

• POST /ai-chat/send - Send a message to the configured prompt (proxied through POST /v1/responses)
• GET /ai-chat/history - Retrieve conversation history (proxied through GET /v1/conversations/{id}/items)
• GET /ai-chat/token - Get CSRF token for requests
• POST /contao/api-key-validate - Validate OpenAI API key

🛡️ Security Features

• CSRF Protection: All requests protected with CSRF tokens
• API Key Encryption: Secure storage of sensitive data
• Environment Variables: Support for secure API key storage via environment variables
• Input Validation: Comprehensive input sanitization
• Rate Limiting: Protection against abuse
• Session Security: Secure session management
• Template Security: Twig templates with automatic escaping
• Asset Security: Static asset loading with proper paths

🔐 API Key Security

The extension supports multiple levels of API key security:

1. Environment Variables (Recommended) - Store keys in .env.local or system environment
2. Encrypted Database Storage - Fallback with AES-256-CBC encryption
3. Real-time Validation - API keys validated with OpenAI on save

📖 For detailed security documentation, see docs/security/api-key-management.md

🗄️ Database Tables

The extension creates three main database tables:

• tl_openai_config: Stores OpenAI API configurations
• tl_openai_prompts: Stores prompt configurations (name, instructions, model, parameters, optional dashboard prompt_id/prompt_version). Renamed from tl_openai_assistants in v2.0 — the migration runs automatically on upgrade.
• tl_openai_files: Stores uploaded file metadata

📚 Documentation

Comprehensive documentation is available in the docs/ directory:

• Installation Guide - Complete setup instructions
• OpenAI Setup - API configuration guide
• Troubleshooting - Common issues and solutions
• Security - Security features and encryption
• Model Selection - AI model compatibility
• API Reference - Backend API endpoints
• Frontend Guide - Chatbot customization

🐛 Troubleshooting

For detailed troubleshooting information, see docs/development/troubleshooting.md.

Quick Fixes

1. API Key Issues: Check OpenAI Setup Guide
2. Model Problems: See Model Selection Guide
3. Security Concerns: Review Security Documentation
4. Frontend Issues: Check Frontend Guide

🤝 Contributing

We welcome contributions! Please see CONTRIBUTING.md for detailed guidelines.

Quick Start for Contributors

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Make your changes
4. Add tests if applicable
5. Commit your changes (git commit -m 'Add amazing feature')
6. Push to the branch (git push origin feature/amazing-feature)
7. Submit a pull request

Development Setup

For local development:

# Clone the repository
git clone https://github.com/juhe-it-solutions/contao-openai-assistant.git

# Install dependencies
composer install

# Set up your Contao development environment
# Ensure you have a valid OpenAI API key for testing

📄 License

This extension is licensed under the LGPL-3.0-or-later license. See LICENSE for details.

Security

If you discover a security vulnerability, please report it privately via email to [[e-mail]]. Do not open public issues for security problems.

Maintainers

• JUHE IT-solutions – [e-mail]

🙏 Acknowledgments

• Contao Team: For the excellent CMS framework
• OpenAI: For the powerful Responses API
• Community: For feedback and contributions

Note: This extension requires a valid OpenAI API key with access to the Responses API and related endpoints (Conversations, Files, Vector Stores). Please ensure you comply with OpenAI's terms of service and usage policies.