wc-licensed-product/CLAUDE.md

WooCommerce Plugin for licensed Products

Author: Marco Graetsch Author URL: https://src.bundespruefstelle.ch/magdev Author Email: magdev3.0@gmail.com Repository URL: https://src.bundespruefstelle.ch/magdev/wc-licensed-product Issues URL: https://src.bundespruefstelle.ch/magdev/wc-licensed-product/issues

Project Overview

This plugin adds a new product type named licensed to sell software products using license keys. It implements an endpoint to check valid licenses against the WooCommerce payment database. License keys are generated are bounded to a specific domain, which must be defined within the checkout process, and will be available as soon as an order is marked as paid. License keys can optionally be bound to major software versions. Customer can view their purchased license keys in their customer profile.

Features

• Add a new product type named licensed
• Generate license keys based on purchased releases, bounded to a specific domain, if the related payment is marked as completed

Frontend

• Customers can view their purchased licenses in the customer area

Administration

• Add CRUD for license keys
• Manage different versions of the same licensed product

Key Fact: 100% AI-Generated

This project is proudly "vibe-coded" using Claude.AI - the entire codebase was created through AI assistance.

Temporary Roadmap

Note for AI Assistants: Clean this section after the specific features are done or new releases are made. Effective changes are tracked in CHANGELOG.md. Do not add completed versions here - document them in the Session History section at the end of this file.

Known Bugs

No known bugs at this time.

Version 0.0.4 (Next)

• Consider adding license usage statistics/analytics
• Consider adding bulk license operations in admin
• Consider adding license renewal/extension functionality

Technical Stack

• Language: PHP 8.3.x
• Framework: Latest WordPress Plugin API
• E-commerce: WooCommerce 10.0+
• Template Engine: Twig 3.0 (via Composer)
• Wordpress Base Theme twentytwentyfive
• Frontend: Vanilla JavaScript
• Styling: Custom CSS
• Dependency Management: Composer
• Internationalization: WordPress i18n (.pot/.po/.mo files)
• Canonical Plugin Name: wc-licensed-product

Security Best Practices

• All user inputs are sanitized (integers for quantities/prices)
• Nonce verification on form submissions
• Output escaping in templates (esc_attr, esc_html, esc_js)
• Direct file access prevention via ABSPATH check

Translation Ready

All user-facing strings use:

__('Text to translate', 'wc-licensed-product')
_e('Text to translate', 'wc-licensed-product')

Text domain: wc-licensed-product

Translation Template

• Base .pot file created: languages/wc-licensed-product.pot
• Ready for translation to any locale
• All translatable strings properly marked with text domain

Available Translations

• en_US - English (United States) [base language - .pot template]
• de_CH - German (Switzerland, formal)

To compile translations to .mo files for production:

for po in languages/*.po; do msgfmt -o "${po%.po}.mo" "$po"; done

Create releases

• The vendor/ directory MUST be included in releases (Dependencies required for runtime)
• Don't create any release files until version 0.1.x and up!
• CRITICAL: Build vendor/ for the MINIMUM supported PHP version, not the development version
  • Use composer config platform.php 8.3.0 before building release packages
  • Run composer update --no-dev --optimize-autoloader to rebuild dependencies
• CRITICAL: WordPress requires plugins in a subdirectory structure
  • Run zip from the plugins/ parent directory, NOT from within the plugin directory
  • Package must extract to wc-licensed-product/ subdirectory with main file at wc-licensed-product/wc-licensed-product.php
  • Correct command: cd /wp-content/plugins/ && zip -r wc-licensed-product/releases/wc-licensed-product-x.x.x.zip wc-licensed-product ...
  • Wrong: Running zip from inside the plugin directory creates files at root level
• CRITICAL: Exclude symlinks explicitly - zip follows symlinks by default
  • Always use -x "wc-licensed-product/wp-core" -x "wc-licensed-product/wp-core/*" -x "wc-licensed-product/wp-plugins" -x "wc-licensed-product/wp-plugins/*" to exclude development symlinks
  • Otherwise the entire linked directory contents will be included in the package
• Exclusion patterns must match the relative path structure used in zip command
• Always verify the package structure with unzip -l before distribution
  • Check all files are prefixed with wc-licensed-product/
  • Verify main file is at wc-licensed-product/wc-licensed-product.php
  • Check for duplicate entries (indicates multiple builds in same archive)
• Test installation on the minimum supported PHP version before final deployment
• Releases are stored in releases/ including checksums
• Track release changes in a single CHANGELOG.md file
• Bump the version number to either bugfix release versions or on new features minor release versions
• CRITICAL: WordPress reads version from TWO places - BOTH must be updated:
  1. Plugin header comment Version: x.x.x (line ~6 in wc-licensed-product.php) - WordPress uses THIS for admin display
  2. PHP constant WC_LICENSED_PRODUCT_VERSION (line ~28) - Used internally by the plugin
  • If only the constant is updated, WordPress will show the old version in Plugins list

Important Git Notes:

• Default branch while development is dev
• Create releases from branch main after merging branch dev
• Tags should use format vX.X.X (e.g., v1.1.22), start with v0.1.0
• Use annotated tags (-a) not lightweight tags
• Commit messages should follow the established format with Claude Code attribution
• .claude/settings.local.json changes are typically local-only (stash before rebasing)

What Gets Released

• All plugin source files
• Compiled vendor dependencies
• Translation files (.mo compiled from .po)
• Assets (CSS, JS)
• Documentation (README, CHANGELOG, etc.)

What's Excluded

• Git metadata (.git/)
• Development files (.vscode/, .claude/, CLAUDE.md, wp-core, wp-plugins)
• Logs and cache files
• Previous releases
• composer.lock (but vendor/ is included)

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For AI Assistants:

When starting a new session on this project:

1. Read this CLAUDE.md file first
2. Semantic versioning follows the MAJOR.MINOR.BUGFIX pattern
3. Check git log for recent changes
4. Verify you're on the dev branch before making changes
5. Run composer install if vendor/ is missing
6. Test changes before committing
7. Follow commit message format with Claude Code attribution
8. Update this session history section with learnings
9. Never commit backup files (*.po~, *.bak, etc.) - check git status before committing
10. Follow markdown linting rules (see below)

Always refer to this document when starting work on this project.

Markdown Linting Rules

When editing CLAUDE.md or other markdown files, follow these rules to avoid linting errors:

1. MD031 - Blank lines around fenced code blocks: Always add a blank line before and after fenced code blocks, even when they follow list items. Example of correct format:

   • Item label:

     (blank line here) ```php code example ``` (blank line here)

2. MD056 - Table column count: Table separators must have matching column counts and proper spacing. Use consistent dash lengths that match column header widths.

3. MD009 - No trailing spaces: Remove trailing whitespace from lines

4. MD012 - No multiple consecutive blank lines: Use only single blank lines between sections

5. MD040 - Fenced code blocks should have a language specified: Always add a language identifier to code blocks (e.g., txt, bash, php). For shortcode examples, use txt.

6. MD032 - Lists should be surrounded by blank lines: Add a blank line before AND after list blocks, including after bold labels like **Attributes:**.

7. MD034 - Bare URLs: Wrap URLs in angle brackets (e.g., <https://example.com>) or use markdown link syntax [text](url).

8. Author section formatting: Use a heading (### Name) instead of bold (**Name**) for the author name to maintain consistent document structure.

Project Architecture

Directory Structure

wc-licensed-product/
├── assets/
│   └── css/           # Frontend and admin stylesheets
├── languages/         # Translation files (.pot, .po, .mo)
├── releases/          # Release packages (version 0.1.0+)
├── src/
│   ├── Admin/         # AdminController - license management UI
│   ├── Api/           # RestApiController - license validation endpoints
│   ├── Checkout/      # CheckoutController - domain field at checkout
│   ├── Frontend/      # AccountController - customer licenses page
│   ├── License/       # License model and LicenseManager
│   └── Product/       # LicensedProduct type and LicensedProductType
├── templates/
│   ├── admin/         # Twig templates for admin views
│   └── frontend/      # Twig templates for customer views
└── vendor/            # Composer dependencies (Twig)

Database Tables

Created on plugin activation via Installer::createTables():

• {prefix}_wc_licensed_product_licenses - License keys with domain binding
• {prefix}_wc_licensed_product_versions - Product version tracking

REST API Endpoints

Base: /wp-json/wc-licensed-product/v1/

Endpoint	Method	Description
/validate	POST	Validate license key for domain
/status	POST	Get license status
/activate	POST	Activate license on domain
/deactivate	POST	Deactivate license

Key Classes

• Plugin (singleton) - Main controller, initializes all components
• Installer - Database setup, activation/deactivation hooks
• LicenseManager - License CRUD, validation, key generation
• License - Entity model with status constants
• LicensedProduct - Extends WC_Product for licensed products
• LicensedProductType - Registers product type with WooCommerce

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Session History

2026-01-21 - Initial Implementation (v0.0.1)

Implemented:

• Created basic WordPress/WooCommerce plugin structure
• Implemented domain-bound license management via REST API
• Added "Licensed Product" WooCommerce product type
• License generation on order completion (XXXX-XXXX-XXXX-XXXX format)
• Customer account page for viewing licenses
• Admin CRUD interface for license management
• Checkout domain field for licensed products
• German (de_CH) translation

Architecture decisions:

• Used Twig 3.0 for templating with fallback PHP templates
• License keys use format XXXX-XXXX-XXXX-XXXX (alphanumeric)
• Licenses bound to normalized domains (no protocol, no www, lowercase)
• REST API at /wp-json/wc-licensed-product/v1/
• Custom database tables for licenses and product versions
• WooCommerce HPOS compatibility included

2026-01-21 - Version 0.0.2 Features

Implemented:

• Product version management UI (meta box on product edit page)
• AJAX-based version CRUD operations
• Email notifications with license keys on order completion
• REST API rate limiting (30 requests/minute per IP)

New classes:

• ProductVersion - Version entity model
• VersionManager - Version CRUD operations
• VersionAdminController - Admin UI for versions
• LicenseEmailController - Email integration

Technical notes:

• Rate limiting uses WordPress transients
• IP detection supports Cloudflare and proxies
• Version management uses AJAX for smooth UX

2026-01-21 - Version 0.0.3 Features

Implemented:

• File attachment support for product versions (WordPress Media Library integration)
• Version auto-detection from uploaded filenames (e.g., plugin-v1.2.3.zip)
• Customer download page for purchased licenses with secure authenticated downloads
• License key copy-to-clipboard functionality on account page
• New card-based UI for customer licenses page with download section
• Product versions meta box visibility fix (now hidden for non-licensed product types)

New classes:

• DownloadController - Secure file delivery with hash-based URL verification

Technical notes:

• Secure download URLs use hash verification (license_id-version_id-hash format)
• Database schema updated: attachment_id column added to versions table
• ProductVersion model extended with getEffectiveDownloadUrl() and getDownloadFilename()
• Media uploader filters for zip files only
• Clipboard API with fallback for older browsers
• Card-based responsive UI design for licenses page

Bug fixes:

• Fixed product versions meta box visibility for non-licensed product types (targets #wc_licensed_product_versions container)