Generate & Edit Images with Gemini AI: Storage & Email Delivery Pipeline

Description

AI Image Generator with Nano Banana: Automated Creation and Delivery

For content creators, agencies, and SaaS developers who need automated AI image generation and editing with professional delivery workflows.

Overview

This template demonstrates intelligent workflow routing based on user input type, leveraging Google's Gemini 2.5 Flash image model for both generative and editing tasks. The workflow includes complete file handling, cloud storage integration, and professional email notification with shareable download links.

Architecture & Key Features

Intelligent Input Detection
Conditional logic automatically detects presence of uploaded image files
Routes requests to appropriate processing branch (text-only vs. image+text)
Single webhook endpoint serves both use cases without manual intervention

Dual Processing Modes
Text-to-Image Generation (Prompt Only):** User submits natural language description and the system generates new images from scratch using Gemini 2.5 Flash
Image-to-Image Editing (Prompt + Image):** User uploads reference image with text instructions for AI-powered editing while maintaining image context

Complete File Management Pipeline
Extracts and validates uploaded image data
Converts AI-generated base64 responses to binary files
Uploads to organized Google Drive folder structure
Generates public sharing links with reader permissions
Implements proper file naming conventions with timestamps

Professional Email Delivery System
Responsive HTML email template with gradient styling
Dynamic content injection (user names, download links)
7-day expiration warnings for urgency
Built-in social sharing CTAs (Twitter, LinkedIn, WhatsApp)
Referral program messaging for viral growth
Mobile-optimized design

Production-Ready Features
API key authentication on webhook endpoint
Proper error handling throughout pipeline
Structured response format for webhook consumers
Success confirmations before file operations

Technical Implementation

Nodes Used
Webhook (with file upload support)
If (conditional routing)
Extract from File (base64 conversion)
Code (image formatting for AI)
HTTP Request (OpenRouter API calls)
Edit Fields (data transformation)
Convert to File (binary operations)
Google Drive (upload & share operations)
Email Send (HTML delivery)
Respond to Webhook

External Dependencies
OpenRouter API (Gemini 2.5 Flash image model)
Google Drive API credentials
SMTP server or email service

Workflow Logic Flow

Input Reception:** Webhook receives form data with optional image file
Route Detection:** Conditional checks for presence of binary image data
Processing Branch A (With Image):** Extract base64 from uploaded file, format as data URL for AI model, send prompt + image to Gemini
Processing Branch B (Text Only):** Send text prompt directly to Gemini and generate image from description
Universal Pipeline (Both Routes):** Parse AI response, extract base64 image, convert to binary file format, upload to Google Drive with dynamic naming, generate shareable public link, send formatted email with download link, return success response to webhook caller

Use Cases

SaaS Image Tools:** Backend API for image generation/editing services
Content Automation:** Automated image creation for marketing campaigns
Client Delivery Systems:** White-label image processing for agencies
E-commerce:** Product image variations and mockups
Social Media Tools:** Automated visual content generation
Design Services:** Rapid prototyping and concept visualization

Customization Options

AI Model Flexibility
Swap Gemini for other vision-capable models
Adjust model parameters for different output styles
Implement multiple model options with user selection

Storage Alternatives
Replace Google Drive with S3, Dropbox, or other cloud storage
Implement local storage for self-hosted deployments
Add CDN integration for faster delivery

Email Template
Fully customizable HTML design
Add brand colors and logos
Modify social sharing options
Customize referral program messaging

Business Logic
Add usage tracking and analytics
Implement credit/subscription systems
Add watermarking for free tier users
Queue management for high-volume processing

Security Considerations

Webhook protected with API key authentication
File type validation on uploads
Proper permissions on Google Drive shares
Email validation before sending

Setup Requirements

OpenRouter account with Gemini 2.5 Flash access
Google Cloud project with Drive API enabled
Email sending credentials (SMTP or service)
n8n instance with webhook support
Public domain for webhook endpoint (production use)

Need Help?

LinkedIn:** Gerald Akhidenor
Work with me:** dominixai.com
My websites:** jobmonkey.dev and mediacraftai.com
Email:** [email protected]