Restaurant Order & Delivery System for WhatsApp with GPT-4o and Supabase

Description

How it works
This workflow creates a complete AI-powered restaurant ordering system through WhatsApp. It receives customer messages, processes multimedia content (text, voice, images, PDFs, location), uses GPT-4 to understand customer intent and manage conversations, handles the complete ordering flow from menu selection to payment verification, and sends formatted orders to restaurant staff. The system maintains conversation memory, verifies payment receipts using OCR, and provides automated responses in multiple languages.

Who's it for
Restaurant owners, food delivery services, and hospitality businesses looking to automate customer service and order management through WhatsApp without hiring additional staff.

Requirements
WhatsApp Business API account
OpenAI API key (GPT-4/GPT-4o access recommended)
Supabase account (for conversation memory and vector storage)
Google Drive account (for menu images and QR codes)
Google Maps API key (for location services)
Gemini API key (for PDF processing)

How to set up
Configure credentials - Add your WhatsApp Business API, OpenAI, Supabase, Google Drive, and Gemini API credentials to n8n
Update phone numbers - Replace [PHONE_NUMBER] placeholders with your actual restaurant and staff phone numbers
Customize restaurant details - Replace [RESTAURANT_NAME], [RESTAURANT_OWNER_NAME], and [BANK_ACCOUNT_NUMBER] with your information
Upload menu images - Add your menu images to Google Drive and update the file IDs
Set up Supabase - Create tables for chat memory and upload your menu/restaurant information to the vector database
Configure AI prompts - Update the restaurant information in the AI agent system messages
Test the workflow - Send test messages to verify all integrations work

How to customize the workflow
Menu management**: Update Google Drive file IDs to display your current menu images
Payment verification**: Modify the receipt analysis logic to match your bank's receipt format
Order formatting**: Customize the order confirmation template sent to kitchen staff
AI personality**: Adjust the restaurant agent's tone and responses in the system prompts
Languages**: The AI supports multiple languages - customize welcome messages for your target market
Business hours**: Add time-based logic to handle orders outside operating hours
Delivery zones**: Integrate with your delivery area logic using the location processing features