# WooCommerce Plugin for licensed Products **Author:** Marco Graetsch **Author URL:** **Author Email:** **Repository URL:** **Issues URL:** ## 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._ ## 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: ```php __('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: ```bash 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) --- **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., ``) 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 ```txt 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 | Full API documentation available in `openapi.json` (OpenAPI 3.1 specification). ### 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 --- ## 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) ### 2026-01-21 - Version 0.0.4 Features **Implemented:** - WooCommerce settings tab "Licensed Products" for default license settings - Default settings for Max Activations, License Validity, and Bind to Major Version - Per-product settings override global defaults (empty = use default) - Settings link in product edit page pointing to WooCommerce settings **New classes:** - `SettingsController` - WooCommerce settings tab integration **Technical notes:** - Settings stored using WooCommerce options API - LicensedProduct model falls back to global defaults when product settings are empty - Added `has_custom_*` methods to check if product has overridden defaults - Product edit panel shows placeholders with default values ### 2026-01-21 - Version 0.0.5 Features **Implemented:** - Bulk license operations in admin (activate, deactivate, revoke, extend, delete) - License renewal/extension functionality (extend by 30/90/365 days) - Set license to lifetime (remove expiration) - Quick action buttons per license row (+30d, ∞, Revoke, Delete) - Checkbox selection with select-all for bulk operations - Improved admin notices for bulk operation results **New methods in LicenseManager:** - `extendLicense()` - Extend license by specified days - `setLicenseLifetime()` - Remove expiration (set to lifetime) - `bulkUpdateStatus()` - Bulk update license status - `bulkDelete()` - Bulk delete licenses - `bulkExtend()` - Bulk extend licenses **Technical notes:** - Admin page redesigned with WordPress list table styling - Twig template functions for generating action URLs with nonces - JavaScript for checkbox synchronization and bulk action handling - Row-actions pattern for cleaner per-license action UI ### 2026-01-21 - Version 0.0.6 Features **Implemented:** - License usage statistics/analytics dashboard (WooCommerce > License Dashboard) - License transfer functionality (change domain from admin) - Export licenses to CSV with all related data - OpenAPI 3.1 specification for REST API (`openapi.json`) - Removed `/deactivate` API endpoint (admin-only operation now) **New methods in LicenseManager:** - `transferLicense()` - Transfer license to new domain - `getStatistics()` - Get comprehensive license statistics - `exportLicensesForCsv()` - Export all licenses for CSV download **New files:** - `templates/admin/dashboard.html.twig` - Dashboard template - `openapi.json` - OpenAPI 3.1 specification **Technical notes:** - Dashboard shows status cards, monthly chart, top products/domains - Transfer uses modal dialog with form submission - CSV export includes BOM for UTF-8 Excel compatibility - OpenAPI spec documents all endpoints with examples and error responses - Statistics query uses SQL aggregation for performance ### 2026-01-21 - Version 0.0.7 Features **Implemented:** - License Dashboard moved to WooCommerce Reports section (Reports > Licenses tab) - License search and filtering in admin (by key, domain, status, product) - Customer-facing license transfer request with AJAX modal - Email notifications for license expiration warnings (7 days and 1 day before) - Bulk import licenses from CSV with validation and options **New methods in LicenseManager:** - `getLicensesExpiringSoon()` - Get licenses expiring within specified days - `markExpirationNotified()` - Track expiration notification state - `wasExpirationNotified()` - Check if notification already sent - `importLicense()` - Create license from imported data **Updated controllers:** - `AdminController` - Added Reports integration, search/filter handling, CSV import - `AccountController` - Added customer transfer AJAX handler with domain validation - `LicenseEmailController` - Added cron scheduling and expiration warning emails - `Installer` - Clears cron events on deactivation **New UI features:** - Search box and filter dropdowns on licenses page - Transfer button and modal on customer licenses page - Import CSV page with format documentation - Pagination preserves filter state **Technical notes:** - WooCommerce Reports integration uses `woocommerce_admin_reports` filter - Customer transfer uses AJAX with nonce verification - Expiration warnings use WordPress cron with daily schedule - CSV import supports both exported format and simplified format - User meta tracks expiration notifications to prevent duplicates ### 2026-01-21 - Version 0.0.8 Features **Implemented:** - Removed "Current Version" field from product license settings - Current version now automatically derived from latest product version in database - Refactored email system to use WooCommerce email notification classes - License Expiration Warning email is now configurable via WooCommerce > Settings > Emails - Email templates can be overridden in themes (woocommerce/emails/license-expiration.php) - Configurable warning days for expiration notifications (first and second warning) **New classes:** - `LicenseExpirationEmail` - WooCommerce WC_Email subclass for license expiration warnings **New files:** - `templates/emails/license-expiration.php` - HTML email template - `templates/emails/plain/license-expiration.php` - Plain text email template **Modified classes:** - `LicensedProduct` - `get_current_version()` and `get_major_version()` now query VersionManager - `LicensedProductType` - Removed Current Version field from product data panel - `VersionAdminController` - Removed automatic update of `_licensed_current_version` meta - `LicenseEmailController` - Registers WooCommerce email class, uses WC email system for sending - `SettingsController` - Updated email section to link to WooCommerce email settings **Technical notes:** - WooCommerce email system allows admins to customize subject, heading, content, and enable/disable - Email templates follow WooCommerce conventions and can be overridden in themes - Expiration warning schedule (days before) remains in plugin settings - Email enable/disable is controlled through WooCommerce email settings