Sell My Images monetizes website images by adding "Download Hi-Res" buttons to content images. Users purchase AI-upscaled versions (4x, 8x) via secure Stripe payments and Upsampler.com processing.

Core System Architecture

Admin Interface

• Settings Page – Three-tab configuration interface for API settings, display control, and download management
• Analytics Page – User engagement tracking and revenue performance metrics
• Jobs Management – Complete processing request management with retry capabilities

API Integration

• REST Endpoints – Public API for pricing, checkout, analytics, downloads, and status polling
• Cost Calculator – Dynamic pricing system based on image dimensions and resolution multipliers
• Stripe Integration – Payment processing with checkout sessions, webhooks, and automatic refunds
• Upsampler Integration – AI-powered image upscaling through Precise Upscale endpoint

Content Processing

• Block Processor – Gutenberg image block detection and download button injection
• Featured Image Processor – Automatic button injection for featured images with conflict detection
• Filter Manager – Display control with flexible inclusion/exclusion rules

Data Management

• Database Manager – Centralized CRUD operations with automated schema management
• Job Manager – Complete lifecycle management from creation to completion
• Download Manager – Secure file delivery with token-based authentication
• File Manager – Secure file storage and management for upscaled images
• Analytics Tracker – User engagement tracking via WordPress post meta
• Webhook Manager – Shared webhook utilities and handler registration

Service Layer

• Payment Service – Complete payment workflow coordination with Stripe integration
• Upscaling Service – AI image processing coordination and file management

Frontend Interface

• Modal System – User interface for pricing, payment, and status tracking
• Button Injection – Automatic button placement with theme compatibility

System Configuration

• Plugin Settings – Comprehensive configuration options for all system aspects
• Webhook Endpoints – Secure external service integration bypassing WordPress routing

Database Schema

• Jobs Table – Complete workflow tracking with financial and processing data
• Analytics Storage – WordPress post meta click tracking and engagement metrics

Process Workflows

• Purchase Workflow – Complete customer journey from button click to download
• Upscaling Workflow – AI-powered image processing using Upsampler API

Communication System

• Email Notifications – Professional HTML notifications for download delivery

Key Features

Monetization System

• AI-powered image upscaling (4x, 8x resolution)
• Stripe-based secure payment processing
• Dynamic pricing based on image dimensions
• Automatic refund processing for failures

User Experience

• One-click download button integration
• Professional modal interface
• Real-time processing status updates
• Mobile-optimized responsive design

Content Integration

• Gutenberg block compatibility
• Theme-agnostic button injection
• Dynamic content support
• Performance-optimized asset loading

Business Intelligence

• Click tracking and conversion analytics
• Revenue reporting and profit analysis
• Customer engagement metrics
• Administrative oversight tools

Security & Compliance

• Token-based download security
• GDPR-compliant data handling
• Secure webhook processing
• SSL-encrypted payment flow

System Requirements

WordPress Environment

• WordPress 5.0+ (Gutenberg required)
• PHP 7.4+
• SSL certificate (required for live payments)
• Writable uploads directory

External Services

• Stripe account (payment processing)
• Upsampler API key (AI image upscaling)
• Valid webhook endpoints

Technical Dependencies

• Composer autoloader
• jQuery (frontend interactions)
• WordPress REST API
• MySQL database with indexes

This documentation covers the complete technical implementation of the Sell My Images plugin for end-user understanding and system utilization.