Add checksum file for v0.6.1 release

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -7,6 +7,76 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.6.1] - 2026-01-27
+
+### Added
+
+- Filter functionality on customer account licenses page (filter by product or domain)
+- Split auto-update settings into two options: "Enable Update Notifications" and "Automatically Install Updates"
+- New `isUpdateNotificationEnabled()`, `isAutoInstallEnabled()` static methods in SettingsController
+- WordPress auto-update filter integration (`auto_update_plugin`) for automatic installation
+
+### Fixed
+
+- Fixed admin license test popup showing empty product field
+- `handleAjaxTestLicense()` now enriches response with product name
+- Removed version field from test popup (version_id is only set for version-bound licenses)
+
+### Changed
+
+- Updated `magdev/wc-licensed-product-client` dependency to v0.2.1
+- "Automatically Install Updates" is only selectable when "Enable Update Notifications" is enabled
+
+## [0.6.0] - 2026-01-27
+
+### Added
+
+- WordPress-style automatic update system for licensed plugins
+- Server-side `/update-check` REST API endpoint for WordPress-compatible update information
+- Client-side `PluginUpdateChecker` singleton for WordPress update integration
+- New "Auto-Updates" settings subtab with enable/disable and check frequency options
+- Secure download authentication via `X-License-Key` header
+- Response signing support for tamper-proof update responses
+- Configurable cache TTL for update checks (1-168 hours)
+
+### Changed
+
+- Updated OpenAPI specification to version 0.6.0 with `/update-check` endpoint documentation
+
+## [0.5.15] - 2026-01-27
+
+### Fixed
+
+- Fixed tab rendering bug in WooCommerce product edit page when switching to licensed or licensed-variable product types
+- Simplified JavaScript to avoid conflicts with WooCommerce's native show/hide logic
+- Removed conflicting CSS rule for `.hide_if_licensed` that was causing layout issues
+- License Settings tab now uses CSS class toggle (`.wclp-active`) instead of jQuery `.show()/.hide()` for proper display
+- Variations tab now properly shows for licensed-variable products via `woocommerce_product_data_tabs` filter
+
+## [0.5.14] - 2026-01-27
+
+### Fixed
+
+- **CRITICAL:** Fixed Product Versions meta box not appearing for licensed-variable products
+- Product Versions meta box now always added to product pages, visibility controlled via CSS/JavaScript
+- Added `Installer::registerProductTypes()` to create product type terms in the `product_type` taxonomy
+- Product type terms are now ensured to exist on `woocommerce_init` hook for existing installations
+- Fixed License Settings tab and Product Versions visibility toggling when changing product types
+
+## [0.5.13] - 2026-01-27
+
+### Fixed
+
+- **CRITICAL:** Fixed licenses not showing in admin order form for licensed-variable products
+- `OrderLicenseController` now uses `LicenseManager::isLicensedProduct()` for consistent product type detection
+- Fixed expected licenses calculation for variable product orders
+- Fixed manual license generation from admin order page for variable products
+
+### Changed
+
+- Removed debug logging from all source files (PHP and JavaScript)
+- Cleaned up checkout blocks integration, Store API extension, and checkout controller
+
 ## [0.5.12] - 2026-01-27
 
 ### Fixed

CLAUDE.md

@@ -32,9 +32,9 @@ This project is proudly **"vibe-coded"** using Claude.AI - the entire codebase w
 
 **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.
 
-### Version 0.6.0
+### Version 0.7.0
 
-*No planned features yet.*
+No changes planned at the moment
 
 ## Technical Stack
 
@@ -197,11 +197,13 @@ wc-licensed-product/
 ├── releases/          # Release packages (version 0.1.0+)
 ├── src/
 │   ├── Admin/         # AdminController - license management UI
-│   ├── Api/           # RestApiController - license validation endpoints
+│   ├── Api/           # RestApiController, UpdateController - REST API endpoints
 │   ├── Checkout/      # CheckoutController - domain field at checkout
+│   ├── Email/         # WooCommerce email classes
 │   ├── Frontend/      # AccountController - customer licenses page
 │   ├── License/       # License model and LicenseManager
-│   └── Product/       # LicensedProduct type and LicensedProductType
+│   ├── Product/       # LicensedProduct type and LicensedProductType
+│   └── Update/        # PluginUpdateChecker - WordPress auto-update integration
 ├── templates/
 │   ├── admin/         # Twig templates for admin views
 │   └── frontend/      # Twig templates for customer views
@@ -219,11 +221,12 @@ Created on plugin activation via `Installer::createTables()`:
 
 Base: `/wp-json/wc-licensed-product/v1/`
 
-| Endpoint    | Method | Description                     |
+| Endpoint        | Method | Description                        |
-| ----------- | ------ | ------------------------------- |
+| --------------- | ------ | ---------------------------------- |
-| `/validate` | POST   | Validate license key for domain |
+| `/validate`     | POST   | Validate license key for domain    |
-| `/status`   | POST   | Get license status              |
+| `/status`       | POST   | Get license status                 |
-| `/activate` | POST   | Activate license on domain      |
+| `/activate`     | POST   | Activate license on domain         |
+| `/update-check` | POST   | Check for plugin updates (v0.6.0+) |
 
 Full API documentation available in `openapi.json` (OpenAPI 3.1 specification).
 
@@ -1543,3 +1546,239 @@ Series of bug fixes for licensed variable products that were showing frontend er
 - Created release package: `releases/wc-licensed-product-0.5.11.zip` (857 KB)
 - SHA256: `32571178bfa8f0d0a03ed05b498d5f9b3c860104393a96732e86a03b6de298d2`
 - Committed to `dev` branch
+
+### 2026-01-27 - Version 0.5.12 - Stock Display Fix
+
+**Overview:**
+
+Fixed stock indicator appearing in cart for licensed variable product variations.
+
+**Bug Fix:**
+
+- Fixed "1 in stock" message appearing in cart for licensed variable product variations
+- Added multiple WooCommerce filter overrides to suppress stock display
+
+**Modified files:**
+
+- `src/Product/LicensedVariableProduct.php` - Override `get_children()`, `get_variation_attributes()`, `get_variation_prices()`, `get_available_variations()`, `is_type()`
+- `src/Product/LicensedProductVariation.php` - Added `get_availability()`, `managing_stock()`, `is_purchasable()` overrides
+- `src/Product/LicensedProductType.php` - Added stock-related filter hooks
+
+**Technical notes:**
+
+- `get_children()` uses direct SQL query to bypass WooCommerce's `is_type('variable')` check
+- `is_type()` override returns true for both 'licensed-variable' and 'variable' type checks
+- Stock filters: `woocommerce_get_availability_text`, `woocommerce_product_get_stock_quantity`, `woocommerce_product_variation_get_stock_quantity`
+
+### 2026-01-27 - Version 0.5.13 - Admin Order License Display Fix
+
+**Overview:**
+
+Fixed licenses not showing in admin order form for licensed-variable products and removed debug logging.
+
+**Bug Fixes:**
+
+- **CRITICAL:** Fixed licenses not appearing in admin order form for orders containing licensed-variable products
+- `OrderLicenseController` now uses `LicenseManager::isLicensedProduct()` for consistent product type detection across 4 locations
+- Fixed expected licenses calculation for variable product orders
+- Fixed manual license generation from admin order page for variable products
+
+**Cleanup:**
+
+- Removed all debug `error_log()` calls from PHP source files
+- Removed all debug `console.log()` calls from JavaScript files
+- Files cleaned: Plugin.php, CheckoutBlocksIntegration.php, StoreApiExtension.php, CheckoutController.php, checkout-blocks.js
+
+**Modified files:**
+
+- `src/Admin/OrderLicenseController.php` - Use `isLicensedProduct()` in 4 locations
+- `src/Plugin.php` - Remove debug logging
+- `src/Checkout/CheckoutBlocksIntegration.php` - Remove debug logging
+- `src/Checkout/StoreApiExtension.php` - Remove debug logging
+- `src/Checkout/CheckoutController.php` - Remove debug logging
+- `assets/js/checkout-blocks.js` - Remove debug logging
+
+**Release v0.5.13:**
+
+- Created release package: `releases/wc-licensed-product-0.5.13.zip` (1.0 MB)
+- SHA256: `814710ad899529d0015494e4b332eace7d8e55aeda381fdf61f99274c0bf910c`
+- Committed to `dev` branch
+
+### 2026-01-27 - Version 0.5.14 - Product Versions Meta Box Fix
+
+**Overview:**
+
+Fixed Product Versions meta box not appearing for licensed-variable products in admin.
+
+**Bug Fixes:**
+
+- Product Versions meta box now always added to product pages, visibility controlled via CSS/JavaScript
+- Added `Installer::registerProductTypes()` to create product type terms in the `product_type` taxonomy
+- Product type terms are now ensured to exist on `woocommerce_init` hook for existing installations
+
+**Modified files:**
+
+- `src/Admin/VersionAdminController.php` - Simplified `addVersionsMetaBox()` to always add meta box
+- `src/Installer.php` - Added `registerProductTypes()` method
+- `src/Product/LicensedProductType.php` - Added `ensureProductTypeTermsExist()` hook
+
+**Technical notes:**
+
+- WooCommerce's `WC_Product_Factory::get_product_type()` requires product type terms to exist in the `product_type` taxonomy
+- Meta box visibility is controlled via JavaScript based on selected product type
+- Taxonomy terms are registered on `woocommerce_init` hook to ensure WooCommerce is fully loaded
+
+### 2026-01-27 - Version 0.5.15 - Tab Rendering Fix
+
+**Overview:**
+
+Fixed tab rendering bug in WooCommerce product edit page when switching to licensed or licensed-variable product types.
+
+**Bug Fixes:**
+
+- Fixed tab rendering issue where License Settings and Variations tabs appeared shifted/overlapping
+- Simplified JavaScript to avoid conflicts with WooCommerce's native show/hide logic
+- Removed conflicting CSS rule for `.hide_if_licensed` that was causing layout issues
+- License Settings tab now uses CSS class toggle (`.wclp-active`) instead of jQuery `.show()/.hide()`
+- Variations tab properly shows for licensed-variable products via `woocommerce_product_data_tabs` filter
+
+**Modified files:**
+
+- `src/Product/LicensedProductType.php` - Simplified `toggleOurElements()` JavaScript function, added `show_if_licensed-variable` class to variations tab
+- `assets/css/admin.css` - Removed `.hide_if_licensed` rule, updated tab visibility CSS to target `li.licensed_product_options`
+
+**Technical notes:**
+
+- jQuery's `.show()` sets `display: block` which can break `<li>` element layouts in tab lists
+- Using CSS class toggle (`addClass/removeClass`) preserves proper display values
+- WooCommerce product data tabs use class pattern `{tab_key}_options` (e.g., `licensed_product_options`)
+- The `woocommerce_product_data_tabs` filter allows adding classes to existing tabs like variations
+
+**Release v0.5.15:**
+
+- Created release package: `releases/wc-licensed-product-0.5.15.zip` (862 KB)
+- SHA256: `47407de49bae4c649644af64e87b44b32fb30eeb2d50890ff8c4bbb741059278`
+- Committed to `dev` branch
+
+### 2026-01-27 - Version 0.6.0 - WordPress Auto-Update System
+
+**Overview:**
+
+Major feature release implementing WordPress-style automatic updates. Licensed plugins can now receive updates through WordPress's native plugin update mechanism by checking against the license server.
+
+**New files:**
+
+- `src/Api/UpdateController.php` - Server-side REST API endpoint for update checks
+- `src/Update/PluginUpdateChecker.php` - Client-side singleton for WordPress update integration
+
+**Implemented:**
+
+- Server-side `/update-check` REST API endpoint serving WordPress-compatible update information
+- Client-side `PluginUpdateChecker` singleton hooking into WordPress's native update system
+- Hooks: `pre_set_site_transient_update_plugins`, `plugins_api`, `http_request_args`
+- New "Auto-Updates" settings subtab with enable/disable toggle and check frequency
+- Configurable cache TTL for update checks (1-168 hours, default: 12)
+- Secure download authentication via `X-License-Key` header
+- Response signing support for tamper-proof update responses
+
+**Modified files:**
+
+- `src/Plugin.php` - Added UpdateController and PluginUpdateChecker initialization
+- `src/Admin/SettingsController.php` - Added 'auto-updates' section with settings
+- `openapi.json` - Documented `/update-check` endpoint with request/response schemas
+- `languages/*` - Updated translations for new strings
+
+**Settings Controller Changes:**
+
+- Added `'auto-updates'` to `getSections()` for sub-tab navigation
+- New `getAutoUpdatesSettings()` method returning enable/frequency settings
+- New static methods: `isAutoUpdateEnabled()`, `getUpdateCheckFrequency()`
+
+**UpdateController API:**
+
+- Endpoint: `POST /wp-json/wc-licensed-product/v1/update-check`
+- Request: `license_key`, `domain`, `plugin_slug` (optional), `current_version` (optional)
+- Response: `update_available`, `version`, `download_url`, `package`, `changelog`, `tested`, `requires`, `requires_php`, etc.
+- License validation before serving update info
+- Secure download URL generation using existing DownloadController patterns
+
+**PluginUpdateChecker Features:**
+
+- Singleton pattern with `getInstance()`
+- Caching via WordPress transients (`wclp_update_info`)
+- Automatic cache clearing on settings save
+- Only activates when license server URL is configured and not self-licensing
+- `forceUpdateCheck()` method for manual refresh
+
+**Configuration:**
+
+To disable auto-updates programmatically:
+
+```php
+define('WC_LICENSE_DISABLE_AUTO_UPDATE', true);
+```
+
+**Technical notes:**
+
+- Update checker only registers when `SettingsController::getPluginLicenseServerUrl()` returns a value
+- Self-licensing detection prevents circular update checks (via `PluginLicenseChecker::isSelfLicensing()`)
+- Download URLs include license key in `X-License-Key` header for server-side verification
+- Uses Symfony HttpClient for server requests with 15s timeout
+- Cache TTL configurable from 1-168 hours in settings
+- OpenAPI spec updated to version 0.6.0 with full `/update-check` documentation
+
+**Release v0.6.0:**
+
+- Created release package: `releases/wc-licensed-product-0.6.0.zip` (1.1 MB)
+- SHA256: `171c8195c586b3b20bac4a806e2d698cdaaf15966e2fd6e1670ec39dac8ab027`
+- Tagged as `v0.6.0` and pushed to `main` branch
+
+### 2026-01-27 - Version 0.6.1 - UI Improvements & Bug Fixes
+
+**Overview:**
+
+Bug fix and improvement release addressing admin license testing, auto-update settings, and customer license filtering.
+
+**Implemented:**
+
+- Filter functionality on customer account licenses page (filter by product or domain)
+- Split auto-update settings into "Enable Update Notifications" and "Automatically Install Updates"
+- WordPress `auto_update_plugin` filter integration for automatic installation
+
+**Bug Fixes:**
+
+- Fixed admin license test popup showing empty product field
+- Removed version field from test popup (version_id is only set for version-bound licenses)
+- `handleAjaxTestLicense()` now enriches response with product name
+
+**Modified files:**
+
+- `src/Admin/AdminController.php` - Enriched test license response with product name
+- `src/Admin/SettingsController.php` - Split auto-update settings, added static helper methods
+- `src/Update/PluginUpdateChecker.php` - Added `auto_update_plugin` filter, use new settings methods
+- `src/Frontend/AccountController.php` - Added filter functionality with `applyLicenseFilters()` method
+- `templates/frontend/licenses.html.twig` - Added filter form with product and domain dropdowns
+- `templates/admin/licenses.html.twig` - Removed version row from test license modal
+- `assets/css/frontend.css` - Added responsive styles for filter form
+- `languages/*` - Updated all translation files
+
+**New methods in SettingsController:**
+
+- `isUpdateNotificationEnabled()` - Check if update notifications are enabled
+- `isAutoInstallEnabled()` - Check if auto-install is enabled (requires notifications enabled)
+
+**New methods in AccountController:**
+
+- `applyLicenseFilters()` - Filter licenses by product ID and/or domain
+- `getFilterOptions()` - Get unique products and domains for filter dropdowns
+
+**Technical notes:**
+
+- Filter form uses GET parameters: `filter_product` and `filter_domain`
+- Auto-install setting is disabled (greyed out) when update notifications are disabled
+- License test popup now only shows Product and Expires fields (version removed)
+- Domain filter uses case-insensitive partial matching via `stripos()`
+
+**Dependency Updates:**
+
+- Updated `magdev/wc-licensed-product-client` from v0.2.0 to v0.2.1

assets/css/admin.css

@@ -50,16 +50,21 @@ code.file-hash {
     color: #666;
 }
 
-/* License Product Tab - Hidden by default, shown via JS based on product type */
+/* License Settings Tab - Hidden by default, shown via JS based on product type */
-#woocommerce-product-data .show_if_licensed,
+/* WooCommerce creates tab with class: {tab_key}_options (licensed_product_options) */
-#woocommerce-product-data .show_if_licensed-variable {
+#woocommerce-product-data ul.wc-tabs li.licensed_product_options {
     display: none;
 }
 
-#woocommerce-product-data .hide_if_licensed {
+/* When shown, restore proper display for tab list items */
-    display: none !important;
+#woocommerce-product-data ul.wc-tabs li.licensed_product_options.wclp-active {
+    display: block;
 }
 
+/* Variations tab visibility for licensed-variable is handled by WooCommerce */
+/* We add show_if_licensed-variable class to the variations tab via PHP filter */
+
+
 /* Action Buttons */
 .wp-list-table .button-link-delete {
     color: #a00;

assets/css/frontend.css

@@ -37,6 +37,80 @@
     color: #383d41;
 }
 
+/* Filter Form */
+.wclp-filter-form {
+    margin-bottom: 1.5em;
+    padding: 1em;
+    background-color: #f8f9fa;
+    border: 1px solid #e5e5e5;
+    border-radius: 8px;
+}
+
+.wclp-filter-row {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 1em;
+    align-items: flex-end;
+}
+
+.wclp-filter-field {
+    display: flex;
+    flex-direction: column;
+    gap: 0.3em;
+    flex: 1;
+    min-width: 150px;
+}
+
+.wclp-filter-field label {
+    font-size: 0.85em;
+    font-weight: 600;
+    color: #666;
+}
+
+.wclp-filter-field select {
+    width: 100%;
+    padding: 0.5em 0.75em;
+    border: 1px solid #ddd;
+    border-radius: 4px;
+    background-color: #fff;
+    font-size: 0.95em;
+}
+
+.wclp-filter-field select:focus {
+    border-color: #0073aa;
+    outline: none;
+    box-shadow: 0 0 0 1px #0073aa;
+}
+
+.wclp-filter-actions {
+    display: flex;
+    gap: 0.5em;
+}
+
+.wclp-filter-actions .button {
+    padding: 0.5em 1em;
+    font-size: 0.95em;
+    white-space: nowrap;
+}
+
+@media (max-width: 600px) {
+    .wclp-filter-row {
+        flex-direction: column;
+    }
+
+    .wclp-filter-field {
+        min-width: 100%;
+    }
+
+    .wclp-filter-actions {
+        width: 100%;
+    }
+
+    .wclp-filter-actions .button {
+        flex: 1;
+    }
+}
+
 /* License Packages */
 .woocommerce-licenses {
     display: flex;

assets/js/checkout-blocks.js

@@ -18,12 +18,25 @@
     }
 
     const { getSetting } = wc.wcSettings;
-    const { createElement, useState } = wp.element;
+    const { createElement, useState, useEffect, useCallback } = wp.element;
     const { TextControl } = wp.components;
     const { __ } = wp.i18n;
 
     // Get available exports from blocksCheckout
-    const { ExperimentalOrderMeta } = wc.blocksCheckout;
+    const { ExperimentalOrderMeta, extensionCartUpdate } = wc.blocksCheckout;
+
+    // Debounce function for API updates
+    function debounce(func, wait) {
+        let timeout;
+        return function executedFunction(...args) {
+            const later = () => {
+                clearTimeout(timeout);
+                func(...args);
+            };
+            clearTimeout(timeout);
+            timeout = setTimeout(later, wait);
+        };
+    }
 
     // Get settings from PHP
     const settings = getSetting('wc-licensed-product_data', {});
@@ -59,6 +72,23 @@
         const [domain, setDomain] = useState('');
         const [error, setError] = useState('');
 
+        // Debounced API update function
+        const updateStoreApi = useCallback(
+            debounce((normalizedDomain) => {
+                if (extensionCartUpdate) {
+                    extensionCartUpdate({
+                        namespace: 'wc-licensed-product',
+                        data: {
+                            licensed_product_domain: normalizedDomain,
+                        },
+                    }).catch(err => {
+                        console.error('[WCLP] Store API update error:', err);
+                    });
+                }
+            }, 500),
+            []
+        );
+
         const handleChange = (value) => {
             const normalized = normalizeDomain(value);
             setDomain(normalized);
@@ -67,9 +97,11 @@
                 setError(settings.validationError || __('Please enter a valid domain.', 'wc-licensed-product'));
             } else {
                 setError('');
+                // Update Store API when valid
+                updateStoreApi(normalized);
             }
 
-            // Store in hidden input for form submission
+            // Store in hidden input for form submission (fallback)
             const hiddenInput = document.getElementById('wclp-domain-hidden');
             if (hiddenInput) {
                 hiddenInput.value = normalized;
@@ -135,6 +167,23 @@
         });
         const [errors, setErrors] = useState({});
 
+        // Debounced API update function
+        const updateStoreApi = useCallback(
+            debounce((domainsData) => {
+                if (extensionCartUpdate) {
+                    extensionCartUpdate({
+                        namespace: 'wc-licensed-product',
+                        data: {
+                            licensed_product_domains: domainsData,
+                        },
+                    }).catch(err => {
+                        console.error('[WCLP] Store API update error:', err);
+                    });
+                }
+            }, 500),
+            []
+        );
+
         if (!products.length) {
             return null;
         }
@@ -174,7 +223,7 @@
 
             setErrors(newErrors);
 
-            // Update hidden field with variation support
+            // Build domain data for Store API
             const data = products.map(p => {
                 const pKey = getProductKey(p);
                 const doms = newDomains[pKey] || [];
@@ -188,6 +237,10 @@
                 return entry;
             }).filter(item => item.domains.length > 0);
 
+            // Update Store API
+            updateStoreApi(data);
+
+            // Update hidden field (fallback)
             const hiddenInput = document.getElementById('wclp-domains-hidden');
             if (hiddenInput) {
                 hiddenInput.value = JSON.stringify(data);
@@ -273,11 +326,13 @@
 
         if (registerPlugin) {
             registerPlugin('wc-licensed-product-domain-fields', {
-                render: () => createElement(
+                render: () => {
-                    ExperimentalOrderMeta,
+                    return createElement(
-                    {},
+                        ExperimentalOrderMeta,
-                    createElement(LicenseDomainsBlock)
+                        {},
-                ),
+                        createElement(LicenseDomainsBlock)
+                    );
+                },
                 scope: 'woocommerce-checkout',
             });
         }
@@ -379,6 +434,68 @@
         } else {
             insertionPoint.appendChild(container);
         }
+
+        // Add event listeners to sync with Store API
+        const debouncedUpdate = debounce(function() {
+            if (!extensionCartUpdate) {
+                return;
+            }
+
+            if (settings.isMultiDomainEnabled && settings.licensedProducts) {
+                // Collect multi-domain data
+                const domainsData = settings.licensedProducts.map(function(product) {
+                    const productKey = product.variation_id && product.variation_id > 0
+                        ? product.product_id + '_' + product.variation_id
+                        : String(product.product_id);
+
+                    const domains = [];
+                    for (let i = 0; i < product.quantity; i++) {
+                        const input = container.querySelector('input[name="licensed_domains[' + productKey + '][' + i + ']"]');
+                        if (input && input.value.trim()) {
+                            domains.push(normalizeDomain(input.value));
+                        }
+                    }
+
+                    const entry = {
+                        product_id: product.product_id,
+                        domains: domains,
+                    };
+                    if (product.variation_id && product.variation_id > 0) {
+                        entry.variation_id = product.variation_id;
+                    }
+                    return entry;
+                }).filter(function(item) { return item.domains.length > 0; });
+
+                extensionCartUpdate({
+                    namespace: 'wc-licensed-product',
+                    data: {
+                        licensed_product_domains: domainsData,
+                    },
+                }).catch(function(err) {
+                    console.error('[WCLP] Store API update error:', err);
+                });
+            } else {
+                // Single domain
+                const input = container.querySelector('input[name="licensed_product_domain"]');
+                if (input) {
+                    const domain = normalizeDomain(input.value);
+                    extensionCartUpdate({
+                        namespace: 'wc-licensed-product',
+                        data: {
+                            licensed_product_domain: domain,
+                        },
+                    }).catch(function(err) {
+                        console.error('[WCLP] Store API update error:', err);
+                    });
+                }
+            }
+        }, 500);
+
+        // Attach event listeners to all domain inputs
+        container.querySelectorAll('input[type="text"]').forEach(function(input) {
+            input.addEventListener('input', debouncedUpdate);
+            input.addEventListener('change', debouncedUpdate);
+        });
     }, 2000);
 
 })();

composer.lock

@@ -12,7 +12,7 @@
             "source": {
                 "type": "git",
                 "url": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client.git",
-                "reference": "5e4b5a970f75d0163c5496581d963a24ade4f276"
+                "reference": "760e1e752a0c088fa634cf7ff678e0735ed525a4"
             },
             "require": {
                 "php": "^8.3",
@@ -52,7 +52,7 @@
                 "issues": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client/issues",
                 "source": "https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client"
             },
-            "time": "2026-01-26T15:54:37+00:00"
+            "time": "2026-01-27T19:52:12+00:00"
         },
         {
             "name": "psr/cache",

openapi.json

@@ -3,7 +3,7 @@
   "info": {
     "title": "WooCommerce Licensed Product API",
     "description": "REST API for validating and managing software licenses bound to domains. This API allows external applications to validate license keys, check license status, and activate licenses on specific domains.\n\n## Response Signing (Optional)\n\nWhen the server is configured with `WC_LICENSE_SERVER_SECRET`, all API responses include cryptographic signatures for tamper protection:\n\n- `X-License-Signature`: HMAC-SHA256 signature of the response\n- `X-License-Timestamp`: Unix timestamp when the response was generated\n\nSignature verification prevents man-in-the-middle attacks and ensures response integrity. Use the `magdev/wc-licensed-product-client` library's `SecureLicenseClient` class to automatically verify signatures.",
-    "version": "0.3.2",
+    "version": "0.6.0",
     "contact": {
       "name": "Marco Graetsch",
       "url": "https://src.bundespruefstelle.ch/magdev",
@@ -332,6 +332,148 @@
           }
         }
       }
+    },
+    "/update-check": {
+      "post": {
+        "operationId": "checkForUpdates",
+        "summary": "Check for plugin updates",
+        "description": "Checks if a newer version of the licensed product is available. Returns WordPress-compatible update information that can be used to integrate with WordPress's native plugin update system.",
+        "tags": ["Plugin Updates"],
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/UpdateCheckRequest"
+              },
+              "example": {
+                "license_key": "ABCD-1234-EFGH-5678",
+                "domain": "example.com",
+                "plugin_slug": "my-licensed-plugin",
+                "current_version": "1.0.0"
+              }
+            },
+            "application/x-www-form-urlencoded": {
+              "schema": {
+                "$ref": "#/components/schemas/UpdateCheckRequest"
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "Update check completed successfully",
+            "headers": {
+              "X-License-Signature": {
+                "$ref": "#/components/headers/X-License-Signature"
+              },
+              "X-License-Timestamp": {
+                "$ref": "#/components/headers/X-License-Timestamp"
+              }
+            },
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/UpdateCheckResponse"
+                },
+                "examples": {
+                  "update_available": {
+                    "summary": "Update is available",
+                    "value": {
+                      "success": true,
+                      "update_available": true,
+                      "version": "1.2.0",
+                      "slug": "my-licensed-plugin",
+                      "plugin": "my-licensed-plugin/my-licensed-plugin.php",
+                      "download_url": "https://example.com/license-download/123-456-abc123",
+                      "package": "https://example.com/license-download/123-456-abc123",
+                      "last_updated": "2026-01-27",
+                      "tested": "6.7",
+                      "requires": "6.0",
+                      "requires_php": "8.3",
+                      "changelog": "## 1.2.0\n- New feature added\n- Bug fixes",
+                      "package_hash": "sha256:abc123def456...",
+                      "name": "My Licensed Plugin",
+                      "homepage": "https://example.com/product/my-plugin"
+                    }
+                  },
+                  "no_update": {
+                    "summary": "No update available",
+                    "value": {
+                      "success": true,
+                      "update_available": false,
+                      "version": "1.0.0"
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "403": {
+            "description": "License validation failed",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                },
+                "examples": {
+                  "license_invalid": {
+                    "summary": "License is not valid",
+                    "value": {
+                      "success": false,
+                      "update_available": false,
+                      "error": "license_invalid",
+                      "message": "License validation failed."
+                    }
+                  },
+                  "domain_mismatch": {
+                    "summary": "Domain mismatch",
+                    "value": {
+                      "success": false,
+                      "update_available": false,
+                      "error": "domain_mismatch",
+                      "message": "This license is not valid for this domain."
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "License or product not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                },
+                "examples": {
+                  "license_not_found": {
+                    "summary": "License not found",
+                    "value": {
+                      "success": false,
+                      "update_available": false,
+                      "error": "license_not_found",
+                      "message": "License not found."
+                    }
+                  },
+                  "product_not_found": {
+                    "summary": "Product not found",
+                    "value": {
+                      "success": false,
+                      "update_available": false,
+                      "error": "product_not_found",
+                      "message": "Licensed product not found."
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "429": {
+            "$ref": "#/components/responses/RateLimitExceeded"
+          }
+        }
+      }
     }
   },
   "components": {
@@ -516,6 +658,130 @@
             "description": "Seconds until rate limit resets"
           }
         }
+      },
+      "UpdateCheckRequest": {
+        "type": "object",
+        "required": ["license_key", "domain"],
+        "properties": {
+          "license_key": {
+            "type": "string",
+            "description": "The license key to validate (format: XXXX-XXXX-XXXX-XXXX)",
+            "maxLength": 64,
+            "example": "ABCD-1234-EFGH-5678"
+          },
+          "domain": {
+            "type": "string",
+            "description": "The domain the plugin is installed on",
+            "maxLength": 255,
+            "example": "example.com"
+          },
+          "plugin_slug": {
+            "type": "string",
+            "description": "The plugin slug (optional, for identification)",
+            "example": "my-licensed-plugin"
+          },
+          "current_version": {
+            "type": "string",
+            "description": "Currently installed version for comparison",
+            "example": "1.0.0"
+          }
+        }
+      },
+      "UpdateCheckResponse": {
+        "type": "object",
+        "properties": {
+          "success": {
+            "type": "boolean",
+            "description": "Whether the request was successful"
+          },
+          "update_available": {
+            "type": "boolean",
+            "description": "Whether an update is available"
+          },
+          "version": {
+            "type": "string",
+            "description": "Latest available version"
+          },
+          "slug": {
+            "type": "string",
+            "description": "Plugin slug for WordPress"
+          },
+          "plugin": {
+            "type": "string",
+            "description": "Plugin basename (slug/slug.php)"
+          },
+          "download_url": {
+            "type": "string",
+            "format": "uri",
+            "description": "Secure download URL for the update package"
+          },
+          "package": {
+            "type": "string",
+            "format": "uri",
+            "description": "Alias for download_url (WordPress compatibility)"
+          },
+          "last_updated": {
+            "type": "string",
+            "format": "date",
+            "description": "Date of the latest release"
+          },
+          "tested": {
+            "type": "string",
+            "description": "Highest WordPress version tested with"
+          },
+          "requires": {
+            "type": "string",
+            "description": "Minimum required WordPress version"
+          },
+          "requires_php": {
+            "type": "string",
+            "description": "Minimum required PHP version"
+          },
+          "changelog": {
+            "type": "string",
+            "description": "Release notes/changelog for the update"
+          },
+          "package_hash": {
+            "type": "string",
+            "description": "SHA256 hash of the package for integrity verification",
+            "example": "sha256:abc123..."
+          },
+          "name": {
+            "type": "string",
+            "description": "Product name"
+          },
+          "homepage": {
+            "type": "string",
+            "format": "uri",
+            "description": "Product homepage URL"
+          },
+          "icons": {
+            "type": "object",
+            "description": "Plugin icons for WordPress admin",
+            "properties": {
+              "1x": {
+                "type": "string",
+                "format": "uri"
+              },
+              "2x": {
+                "type": "string",
+                "format": "uri"
+              }
+            }
+          },
+          "sections": {
+            "type": "object",
+            "description": "Content sections for plugin info modal",
+            "properties": {
+              "description": {
+                "type": "string"
+              },
+              "changelog": {
+                "type": "string"
+              }
+            }
+          }
+        }
       }
     },
     "responses": {
@@ -577,6 +843,10 @@
     {
       "name": "License Activation",
       "description": "Activate licenses on domains"
+    },
+    {
+      "name": "Plugin Updates",
+      "description": "Check for plugin updates via WordPress-compatible API"
     }
   ]
 }

releases/wc-licensed-product-0.5.13.zip.sha256

@@ -0,0 +1 @@
+814710ad899529d0015494e4b332eace7d8e55aeda381fdf61f99274c0bf910c  wc-licensed-product-0.5.13.zip

releases/wc-licensed-product-0.5.15.sha256

@@ -0,0 +1 @@
+47407de49bae4c649644af64e87b44b32fb30eeb2d50890ff8c4bbb741059278  wc-licensed-product-0.5.15.zip

releases/wc-licensed-product-0.6.0.zip.sha256

@@ -0,0 +1 @@
+171c8195c586b3b20bac4a806e2d698cdaaf15966e2fd6e1670ec39dac8ab027  releases/wc-licensed-product-0.6.0.zip

releases/wc-licensed-product-0.6.1.zip.sha256

@@ -0,0 +1 @@
+f1f1cbdfdd6cda7b20cbd2b88ab4697cde38d987e04cda1f52e885d7818d32f5  wc-licensed-product-0.6.1.zip

src/Admin/AdminController.php

@@ -379,6 +379,19 @@ final class AdminController
         // Validate the license using LicenseManager
         $result = $this->licenseManager->validateLicense($licenseKey, $domain);
 
+        // Enrich result with product name for display in the popup
+        if (!empty($result['valid']) && isset($result['license'])) {
+            // Get product name
+            $productId = $result['license']['product_id'] ?? null;
+            if ($productId) {
+                $product = wc_get_product($productId);
+                $result['product_name'] = $product ? $product->get_name() : __('Unknown Product', 'wc-licensed-product');
+            }
+
+            // Flatten expires_at for easier access in JavaScript
+            $result['expires_at'] = $result['license']['expires_at'] ?? null;
+        }
+
         wp_send_json_success($result);
     }
 
@@ -1605,12 +1618,11 @@ final class AdminController
                                 if (result.valid) {
                                     html = '<div class="notice notice-success inline"><p><strong>✓ <?php echo esc_js(__('License is VALID', 'wc-licensed-product')); ?></strong></p></div>';
                                     html += '<table class="widefat striped"><tbody>';
-                                    html += '<tr><th><?php echo esc_js(__('Product', 'wc-licensed-product')); ?></th><td>' + escapeHtml(result.product_name || '-') + '</td></tr>';
+                                    html += '<tr><th><?php echo esc_js(__('Product', 'wc-licensed-product')); ?></th><td><strong>' + escapeHtml(result.product_name || '-') + '</strong></td></tr>';
-                                    html += '<tr><th><?php echo esc_js(__('Version', 'wc-licensed-product')); ?></th><td>' + escapeHtml(result.version || '-') + '</td></tr>';
                                     if (result.expires_at) {
                                         html += '<tr><th><?php echo esc_js(__('Expires', 'wc-licensed-product')); ?></th><td>' + escapeHtml(result.expires_at) + '</td></tr>';
                                     } else {
-                                        html += '<tr><th><?php echo esc_js(__('Expires', 'wc-licensed-product')); ?></th><td><?php echo esc_js(__('Lifetime', 'wc-licensed-product')); ?></td></tr>';
+                                        html += '<tr><th><?php echo esc_js(__('Expires', 'wc-licensed-product')); ?></th><td><span class="license-lifetime"><?php echo esc_js(__('Lifetime', 'wc-licensed-product')); ?></span></td></tr>';
                                     }
                                     html += '</tbody></table>';
                                 } else {

src/Admin/OrderLicenseController.php

@@ -83,7 +83,7 @@ final class OrderLicenseController
         $hasLicensedProduct = false;
         foreach ($order->get_items() as $item) {
             $product = $item->get_product();
-            if ($product && $product->is_type('licensed')) {
+            if ($product && $this->licenseManager->isLicensedProduct($product)) {
                 $hasLicensedProduct = true;
                 break;
             }
@@ -162,7 +162,7 @@ final class OrderLicenseController
                 // Legacy: one license per licensed product
                 foreach ($order->get_items() as $item) {
                     $product = $item->get_product();
-                    if ($product && $product->is_type('licensed')) {
+                    if ($product && $this->licenseManager->isLicensedProduct($product)) {
                         $expectedLicenses++;
                     }
                 }
@@ -567,7 +567,7 @@ final class OrderLicenseController
 
         foreach ($order->get_items() as $item) {
             $product = $item->get_product();
-            if (!$product || !$product->is_type('licensed')) {
+            if (!$product || !$this->licenseManager->isLicensedProduct($product)) {
                 continue;
             }
 
@@ -615,7 +615,7 @@ final class OrderLicenseController
 
         foreach ($order->get_items() as $item) {
             $product = $item->get_product();
-            if (!$product || !$product->is_type('licensed')) {
+            if (!$product || !$this->licenseManager->isLicensedProduct($product)) {
                 continue;
             }
 

src/Admin/SettingsController.php

@@ -62,6 +62,7 @@ final class SettingsController
     {
         return [
             '' => __('Plugin License', 'wc-licensed-product'),
+            'auto-updates' => __('Auto-Updates', 'wc-licensed-product'),
             'defaults' => __('Default Settings', 'wc-licensed-product'),
             'notifications' => __('Notifications', 'wc-licensed-product'),
         ];
@@ -112,6 +113,7 @@ final class SettingsController
         $currentSection = $this->getCurrentSection();
 
         return match ($currentSection) {
+            'auto-updates' => $this->getAutoUpdatesSettings(),
             'defaults' => $this->getDefaultsSettings(),
             'notifications' => $this->getNotificationsSettings(),
             default => $this->getPluginLicenseSettings(),
@@ -160,6 +162,56 @@ final class SettingsController
         ];
     }
 
+    /**
+     * Get auto-updates settings
+     */
+    private function getAutoUpdatesSettings(): array
+    {
+        $autoInstallDisabled = !self::isUpdateNotificationEnabled();
+
+        return [
+            'auto_update_section_title' => [
+                'name' => __('Auto-Updates', 'wc-licensed-product'),
+                'type' => 'title',
+                'desc' => __('Configure automatic plugin updates from the license server.', 'wc-licensed-product'),
+                'id' => 'wc_licensed_product_section_auto_update',
+            ],
+            'update_notification_enabled' => [
+                'name' => __('Enable Update Notifications', 'wc-licensed-product'),
+                'type' => 'checkbox',
+                'desc' => __('Check for and display available updates from the license server in WordPress admin.', 'wc-licensed-product'),
+                'id' => 'wc_licensed_product_update_notification_enabled',
+                'default' => 'yes',
+            ],
+            'plugin_auto_install_enabled' => [
+                'name' => __('Automatically Install Updates', 'wc-licensed-product'),
+                'type' => 'checkbox',
+                'desc' => $autoInstallDisabled
+                    ? __('Enable "Update Notifications" above to use this option.', 'wc-licensed-product')
+                    : __('Automatically install updates when they become available (requires update notifications enabled).', 'wc-licensed-product'),
+                'id' => 'wc_licensed_product_plugin_auto_install_enabled',
+                'default' => 'no',
+                'custom_attributes' => $autoInstallDisabled ? ['disabled' => 'disabled'] : [],
+            ],
+            'update_check_frequency' => [
+                'name' => __('Check Frequency (Hours)', 'wc-licensed-product'),
+                'type' => 'number',
+                'desc' => __('How often to check for updates (in hours).', 'wc-licensed-product'),
+                'id' => 'wc_licensed_product_update_check_frequency',
+                'default' => '12',
+                'custom_attributes' => [
+                    'min' => '1',
+                    'max' => '168',
+                    'step' => '1',
+                ],
+            ],
+            'auto_update_section_end' => [
+                'type' => 'sectionend',
+                'id' => 'wc_licensed_product_section_auto_update_end',
+            ],
+        ];
+    }
+
     /**
      * Get default license settings
      */
@@ -460,6 +512,44 @@ final class SettingsController
         return !empty($secret) ? (string) $secret : null;
     }
 
+    /**
+     * Check if update notifications are enabled
+     */
+    public static function isUpdateNotificationEnabled(): bool
+    {
+        return get_option('wc_licensed_product_update_notification_enabled', 'yes') === 'yes';
+    }
+
+    /**
+     * Check if auto-updates are enabled (legacy alias for isUpdateNotificationEnabled)
+     */
+    public static function isAutoUpdateEnabled(): bool
+    {
+        return self::isUpdateNotificationEnabled();
+    }
+
+    /**
+     * Check if automatic installation of updates is enabled
+     */
+    public static function isAutoInstallEnabled(): bool
+    {
+        // Auto-install requires notifications to be enabled first
+        if (!self::isUpdateNotificationEnabled()) {
+            return false;
+        }
+
+        return get_option('wc_licensed_product_plugin_auto_install_enabled', 'no') === 'yes';
+    }
+
+    /**
+     * Get update check frequency in hours
+     */
+    public static function getUpdateCheckFrequency(): int
+    {
+        $value = get_option('wc_licensed_product_update_check_frequency', 12);
+        return max(1, min(168, (int) $value));
+    }
+
     /**
      * Handle AJAX verify license request
      */

src/Admin/VersionAdminController.php

@@ -43,25 +43,21 @@ final class VersionAdminController
 
     /**
      * Add versions meta box to product edit page
+     * Always adds the meta box - visibility is controlled via CSS/JavaScript based on product type
      */
     public function addVersionsMetaBox(): void
     {
         global $post;
 
-        // Only add meta box for licensed products or new products
         if ($post && $post->post_type === 'product') {
-            $product = wc_get_product($post->ID);
+            add_meta_box(
-            // Show for licensed products or new products (where type might be selected later)
+                'wc_licensed_product_versions',
-            if (!$product || $product->is_type('licensed') || $post->post_status === 'auto-draft') {
+                __('Product Versions', 'wc-licensed-product'),
-                add_meta_box(
+                [$this, 'renderVersionsMetaBox'],
-                    'wc_licensed_product_versions',
+                'product',
-                    __('Product Versions', 'wc-licensed-product'),
+                'normal',
-                    [$this, 'renderVersionsMetaBox'],
+                'high'
-                    'product',
+            );
-                    'normal',
-                    'high'
-                );
-            }
         }
     }
 
@@ -280,12 +276,13 @@ final class VersionAdminController
         }
 
         // Verify product exists and is of type licensed
-        $product = wc_get_product($productId);
+        // Use WC_Product_Factory::get_product_type() for reliable type detection
-        if (!$product) {
+        $productType = \WC_Product_Factory::get_product_type($productId);
+        if (!$productType) {
             wp_send_json_error(['message' => __('Product not found.', 'wc-licensed-product')]);
         }
 
-        if (!$product->is_type('licensed')) {
+        if (!in_array($productType, ['licensed', 'licensed-variable'], true)) {
             wp_send_json_error(['message' => __('This product is not a licensed product.', 'wc-licensed-product')]);
         }
 

src/Api/UpdateController.php

@@ -0,0 +1,352 @@
+<?php
+/**
+ * Update Controller
+ *
+ * REST API endpoint for plugin update checks
+ *
+ * @package Jeremias\WcLicensedProduct\Api
+ */
+
+declare(strict_types=1);
+
+namespace Jeremias\WcLicensedProduct\Api;
+
+use Jeremias\WcLicensedProduct\License\LicenseManager;
+use Jeremias\WcLicensedProduct\Product\VersionManager;
+use Jeremias\WcLicensedProduct\Product\ProductVersion;
+use WP_REST_Request;
+use WP_REST_Response;
+use WP_REST_Server;
+
+/**
+ * Handles REST API endpoint for plugin update checks
+ *
+ * This endpoint allows licensed plugins to check for updates from this WooCommerce store.
+ * It validates the license and returns WordPress-compatible update information.
+ */
+final class UpdateController
+{
+    private const NAMESPACE = 'wc-licensed-product/v1';
+
+    /**
+     * Default rate limit: requests per window per IP
+     */
+    private const DEFAULT_RATE_LIMIT = 30;
+
+    /**
+     * Default rate limit window in seconds
+     */
+    private const DEFAULT_RATE_WINDOW = 60;
+
+    private LicenseManager $licenseManager;
+    private VersionManager $versionManager;
+
+    public function __construct(LicenseManager $licenseManager, VersionManager $versionManager)
+    {
+        $this->licenseManager = $licenseManager;
+        $this->versionManager = $versionManager;
+        $this->registerHooks();
+    }
+
+    /**
+     * Register WordPress hooks
+     */
+    private function registerHooks(): void
+    {
+        add_action('rest_api_init', [$this, 'registerRoutes']);
+    }
+
+    /**
+     * Get the configured rate limit (requests per window)
+     */
+    private function getRateLimit(): int
+    {
+        return defined('WC_LICENSE_RATE_LIMIT')
+            ? (int) WC_LICENSE_RATE_LIMIT
+            : self::DEFAULT_RATE_LIMIT;
+    }
+
+    /**
+     * Get the configured rate limit window in seconds
+     */
+    private function getRateWindow(): int
+    {
+        return defined('WC_LICENSE_RATE_WINDOW')
+            ? (int) WC_LICENSE_RATE_WINDOW
+            : self::DEFAULT_RATE_WINDOW;
+    }
+
+    /**
+     * Check rate limit for current IP
+     *
+     * @return WP_REST_Response|null Returns error response if rate limited, null if OK
+     */
+    private function checkRateLimit(): ?WP_REST_Response
+    {
+        $ip = $_SERVER['REMOTE_ADDR'] ?? '0.0.0.0';
+        $transientKey = 'wclp_update_rate_' . md5($ip);
+        $rateLimit = $this->getRateLimit();
+        $rateWindow = $this->getRateWindow();
+
+        $data = get_transient($transientKey);
+
+        if ($data === false) {
+            set_transient($transientKey, ['count' => 1, 'start' => time()], $rateWindow);
+            return null;
+        }
+
+        $count = (int) ($data['count'] ?? 0);
+        $start = (int) ($data['start'] ?? time());
+
+        if (time() - $start >= $rateWindow) {
+            set_transient($transientKey, ['count' => 1, 'start' => time()], $rateWindow);
+            return null;
+        }
+
+        if ($count >= $rateLimit) {
+            $retryAfter = $rateWindow - (time() - $start);
+            $response = new WP_REST_Response([
+                'success' => false,
+                'error' => 'rate_limit_exceeded',
+                'message' => __('Too many requests. Please try again later.', 'wc-licensed-product'),
+                'retry_after' => $retryAfter,
+            ], 429);
+            $response->header('Retry-After', (string) $retryAfter);
+            return $response;
+        }
+
+        set_transient($transientKey, ['count' => $count + 1, 'start' => $start], $rateWindow);
+        return null;
+    }
+
+    /**
+     * Register REST API routes
+     */
+    public function registerRoutes(): void
+    {
+        register_rest_route(self::NAMESPACE, '/update-check', [
+            'methods' => WP_REST_Server::CREATABLE,
+            'callback' => [$this, 'handleUpdateCheck'],
+            'permission_callback' => '__return_true',
+            'args' => [
+                'license_key' => [
+                    'required' => true,
+                    'type' => 'string',
+                    'sanitize_callback' => 'sanitize_text_field',
+                    'validate_callback' => function ($value): bool {
+                        $len = strlen($value);
+                        return !empty($value) && $len >= 8 && $len <= 64;
+                    },
+                ],
+                'domain' => [
+                    'required' => true,
+                    'type' => 'string',
+                    'sanitize_callback' => 'sanitize_text_field',
+                    'validate_callback' => function ($value): bool {
+                        return !empty($value) && strlen($value) <= 255;
+                    },
+                ],
+                'plugin_slug' => [
+                    'required' => false,
+                    'type' => 'string',
+                    'sanitize_callback' => 'sanitize_text_field',
+                ],
+                'current_version' => [
+                    'required' => false,
+                    'type' => 'string',
+                    'sanitize_callback' => 'sanitize_text_field',
+                ],
+            ],
+        ]);
+    }
+
+    /**
+     * Handle update check request
+     */
+    public function handleUpdateCheck(WP_REST_Request $request): WP_REST_Response
+    {
+        $rateLimitResponse = $this->checkRateLimit();
+        if ($rateLimitResponse !== null) {
+            return $rateLimitResponse;
+        }
+
+        $licenseKey = $request->get_param('license_key');
+        $domain = $request->get_param('domain');
+        $currentVersion = $request->get_param('current_version');
+
+        // Validate license
+        $validationResult = $this->licenseManager->validateLicense($licenseKey, $domain);
+
+        if (!$validationResult['valid']) {
+            return new WP_REST_Response([
+                'success' => false,
+                'update_available' => false,
+                'error' => $validationResult['error'] ?? 'license_invalid',
+                'message' => $validationResult['message'] ?? __('License validation failed.', 'wc-licensed-product'),
+            ], $validationResult['error'] === 'license_not_found' ? 404 : 403);
+        }
+
+        // Get license to access product ID
+        $license = $this->licenseManager->getLicenseByKey($licenseKey);
+        if (!$license) {
+            return new WP_REST_Response([
+                'success' => false,
+                'update_available' => false,
+                'error' => 'license_not_found',
+                'message' => __('License not found.', 'wc-licensed-product'),
+            ], 404);
+        }
+
+        $productId = $license->getProductId();
+        $product = wc_get_product($productId);
+
+        if (!$product) {
+            return new WP_REST_Response([
+                'success' => false,
+                'update_available' => false,
+                'error' => 'product_not_found',
+                'message' => __('Licensed product not found.', 'wc-licensed-product'),
+            ], 404);
+        }
+
+        // Get latest version based on major version binding
+        $latestVersion = $this->getLatestVersionForLicense($license);
+
+        if (!$latestVersion) {
+            return new WP_REST_Response([
+                'success' => true,
+                'update_available' => false,
+                'version' => $currentVersion ?? '0.0.0',
+                'message' => __('No versions available for this product.', 'wc-licensed-product'),
+            ]);
+        }
+
+        // Check if update is available
+        $updateAvailable = $currentVersion
+            ? version_compare($latestVersion->getVersion(), $currentVersion, '>')
+            : true;
+
+        // Build response
+        $response = $this->buildUpdateResponse($product, $latestVersion, $license, $updateAvailable);
+
+        return new WP_REST_Response($response);
+    }
+
+    /**
+     * Get latest version for a license, respecting major version binding
+     */
+    private function getLatestVersionForLicense($license): ?ProductVersion
+    {
+        $productId = $license->getProductId();
+
+        // Check if license is bound to a specific version
+        $versionId = $license->getVersionId();
+        if ($versionId) {
+            $boundVersion = $this->versionManager->getVersionById($versionId);
+            if ($boundVersion) {
+                // Get latest version for this major version
+                return $this->versionManager->getLatestVersionForMajor(
+                    $productId,
+                    $boundVersion->getMajorVersion()
+                );
+            }
+        }
+
+        // No version binding, return latest overall
+        return $this->versionManager->getLatestVersion($productId);
+    }
+
+    /**
+     * Build WordPress-compatible update response
+     */
+    private function buildUpdateResponse($product, ProductVersion $version, $license, bool $updateAvailable): array
+    {
+        $productSlug = $product->get_slug();
+
+        // Generate secure download URL
+        $downloadUrl = $this->generateUpdateDownloadUrl($license->getId(), $version->getId());
+
+        $response = [
+            'success' => true,
+            'update_available' => $updateAvailable,
+            'version' => $version->getVersion(),
+            'slug' => $productSlug,
+            'plugin' => $productSlug . '/' . $productSlug . '.php',
+            'download_url' => $downloadUrl,
+            'package' => $downloadUrl,
+            'last_updated' => $version->getReleasedAt()->format('Y-m-d'),
+            'tested' => $this->getTestedWpVersion(),
+            'requires' => $this->getRequiredWpVersion(),
+            'requires_php' => $this->getRequiredPhpVersion(),
+        ];
+
+        // Add changelog if available
+        if ($version->getReleaseNotes()) {
+            $response['changelog'] = $version->getReleaseNotes();
+            $response['sections'] = [
+                'description' => $product->get_short_description() ?: $product->get_description(),
+                'changelog' => $version->getReleaseNotes(),
+            ];
+        }
+
+        // Add package hash for integrity verification
+        if ($version->getFileHash()) {
+            $response['package_hash'] = 'sha256:' . $version->getFileHash();
+        }
+
+        // Add product name and homepage
+        $response['name'] = $product->get_name();
+        $response['homepage'] = get_permalink($product->get_id());
+
+        // Add icons if product has featured image
+        $imageId = $product->get_image_id();
+        if ($imageId) {
+            $iconUrl = wp_get_attachment_image_url($imageId, 'thumbnail');
+            $iconUrl2x = wp_get_attachment_image_url($imageId, 'medium');
+            if ($iconUrl) {
+                $response['icons'] = [
+                    '1x' => $iconUrl,
+                    '2x' => $iconUrl2x ?: $iconUrl,
+                ];
+            }
+        }
+
+        return $response;
+    }
+
+    /**
+     * Generate secure download URL for updates
+     */
+    private function generateUpdateDownloadUrl(int $licenseId, int $versionId): string
+    {
+        $data = $licenseId . '-' . $versionId . '-' . wp_salt('auth');
+        $hash = substr(hash('sha256', $data), 0, 16);
+        $downloadKey = $licenseId . '-' . $versionId . '-' . $hash;
+
+        return home_url('license-download/' . $downloadKey);
+    }
+
+    /**
+     * Get tested WordPress version from plugin headers
+     */
+    private function getTestedWpVersion(): string
+    {
+        return get_option('wc_licensed_product_tested_wp', '6.7');
+    }
+
+    /**
+     * Get required WordPress version from plugin headers
+     */
+    private function getRequiredWpVersion(): string
+    {
+        return get_option('wc_licensed_product_requires_wp', '6.0');
+    }
+
+    /**
+     * Get required PHP version
+     */
+    private function getRequiredPhpVersion(): string
+    {
+        return get_option('wc_licensed_product_requires_php', '8.3');
+    }
+}

src/Checkout/CheckoutBlocksIntegration.php

@@ -112,10 +112,12 @@ final class CheckoutBlocksIntegration implements IntegrationInterface
     public function get_script_data(): array
     {
         $isMultiDomain = SettingsController::isMultiDomainEnabled();
+        $licensedProducts = $this->getLicensedProductsFromCart();
+        $hasLicensedProducts = !empty($licensedProducts);
 
         return [
-            'hasLicensedProducts' => $this->cartHasLicensedProducts(),
+            'hasLicensedProducts' => $hasLicensedProducts,
-            'licensedProducts' => $this->getLicensedProductsFromCart(),
+            'licensedProducts' => $licensedProducts,
             'isMultiDomainEnabled' => $isMultiDomain,
             'fieldPlaceholder' => __('example.com', 'wc-licensed-product'),
             'fieldDescription' => $isMultiDomain
@@ -151,8 +153,11 @@ final class CheckoutBlocksIntegration implements IntegrationInterface
         }
 
         $licensedProducts = [];
-        foreach (WC()->cart->get_cart() as $cartItem) {
+        $cartContents = WC()->cart->get_cart();
+
+        foreach ($cartContents as $cartKey => $cartItem) {
             $product = $cartItem['data'];
+
             if (!$product) {
                 continue;
             }
@@ -171,11 +176,12 @@ final class CheckoutBlocksIntegration implements IntegrationInterface
             }
 
             // Check for variations of licensed-variable products
-            if ($product->is_type('variation')) {
+            // Use WC_Product_Factory::get_product_type() for reliable parent type check
-                $parentId = $product->get_parent_id();
+            $parentId = $product->get_parent_id();
-                $parent = wc_get_product($parentId);
+            if ($parentId) {
+                $parentType = \WC_Product_Factory::get_product_type($parentId);
 
-                if ($parent && $parent->is_type('licensed-variable')) {
+                if ($parentType === 'licensed-variable') {
                     $variationId = $product->get_id();
 
                     // Get duration label if it's a LicensedProductVariation

src/Checkout/CheckoutController.php

@@ -67,8 +67,9 @@ final class CheckoutController
         }
 
         $licensedProducts = [];
-        foreach (WC()->cart->get_cart() as $cartItem) {
+        foreach (WC()->cart->get_cart() as $cartItemKey => $cartItem) {
             $product = $cartItem['data'];
+
             if (!$product) {
                 continue;
             }
@@ -87,11 +88,12 @@ final class CheckoutController
             }
 
             // Check for variations of licensed-variable products
-            if ($product->is_type('variation')) {
+            // Use WC_Product_Factory::get_product_type() for reliable parent type check
-                $parentId = $product->get_parent_id();
+            $parentId = $product->get_parent_id();
-                $parent = wc_get_product($parentId);
+            if ($parentId) {
+                $parentType = \WC_Product_Factory::get_product_type($parentId);
 
-                if ($parent && $parent->is_type('licensed-variable')) {
+                if ($parentType === 'licensed-variable') {
                     $variationId = $product->get_id();
                     // Use combination key to allow same product with different variations
                     $key = "{$parentId}_{$variationId}";
@@ -127,6 +129,7 @@ final class CheckoutController
     public function addDomainField(): void
     {
         $licensedProducts = $this->getLicensedProductsFromCart();
+
         if (empty($licensedProducts)) {
             return;
         }
@@ -401,6 +404,7 @@ final class CheckoutController
     public function saveDomainField(int $orderId): void
     {
         $licensedProducts = $this->getLicensedProductsFromCart();
+
         if (empty($licensedProducts)) {
             return;
         }

src/Frontend/AccountController.php

@@ -106,23 +106,104 @@ final class AccountController
             return;
         }
 
+        // Get filter parameters from URL
+        $filterProductId = isset($_GET['filter_product']) ? absint($_GET['filter_product']) : 0;
+        $filterDomain = isset($_GET['filter_domain']) ? sanitize_text_field(wp_unslash($_GET['filter_domain'])) : '';
+
         $licenses = $this->licenseManager->getLicensesByCustomer($customerId);
 
+        // Apply filters
+        $filteredLicenses = $this->applyLicenseFilters($licenses, $filterProductId, $filterDomain);
+
         // Group licenses by product+order into "packages"
-        $packages = $this->groupLicensesIntoPackages($licenses);
+        $packages = $this->groupLicensesIntoPackages($filteredLicenses);
+
+        // Get unique products and domains for filter dropdowns
+        $filterOptions = $this->getFilterOptions($licenses);
 
         try {
             echo $this->twig->render('frontend/licenses.html.twig', [
                 'packages' => $packages,
                 'has_packages' => !empty($packages),
                 'signing_enabled' => ResponseSigner::isSigningEnabled(),
+                'filter_products' => $filterOptions['products'],
+                'filter_domains' => $filterOptions['domains'],
+                'current_filter_product' => $filterProductId,
+                'current_filter_domain' => $filterDomain,
+                'is_filtered' => $filterProductId > 0 || !empty($filterDomain),
+                'licenses_url' => wc_get_account_endpoint_url('licenses'),
             ]);
         } catch (\Exception $e) {
             // Fallback to PHP template if Twig fails
-            $this->displayLicensesFallback($packages);
+            $this->displayLicensesFallback($packages, $filterOptions, $filterProductId, $filterDomain);
         }
     }
 
+    /**
+     * Apply filters to licenses
+     *
+     * @param array $licenses Array of License objects
+     * @param int $productId Filter by product ID (0 for all)
+     * @param string $domain Filter by domain (empty for all)
+     * @return array Filtered array of License objects
+     */
+    private function applyLicenseFilters(array $licenses, int $productId, string $domain): array
+    {
+        if ($productId === 0 && empty($domain)) {
+            return $licenses;
+        }
+
+        return array_filter($licenses, function ($license) use ($productId, $domain) {
+            // Filter by product
+            if ($productId > 0 && $license->getProductId() !== $productId) {
+                return false;
+            }
+
+            // Filter by domain (partial match)
+            if (!empty($domain) && stripos($license->getDomain(), $domain) === false) {
+                return false;
+            }
+
+            return true;
+        });
+    }
+
+    /**
+     * Get unique filter options from licenses
+     *
+     * @param array $licenses Array of License objects
+     * @return array Array with 'products' and 'domains' keys
+     */
+    private function getFilterOptions(array $licenses): array
+    {
+        $products = [];
+        $domains = [];
+
+        foreach ($licenses as $license) {
+            // Collect unique products
+            $productId = $license->getProductId();
+            if (!isset($products[$productId])) {
+                $product = wc_get_product($productId);
+                $products[$productId] = $product ? $product->get_name() : __('Unknown Product', 'wc-licensed-product');
+            }
+
+            // Collect unique domains
+            $domain = $license->getDomain();
+            if (!in_array($domain, $domains, true)) {
+                $domains[] = $domain;
+            }
+        }
+
+        // Sort products by name, domains alphabetically
+        asort($products);
+        sort($domains);
+
+        return [
+            'products' => $products,
+            'domains' => $domains,
+        ];
+    }
+
     /**
      * Group licenses into packages by product+order
      *
@@ -217,10 +298,67 @@ final class AccountController
     /**
      * Fallback display method if Twig is unavailable
      */
-    private function displayLicensesFallback(array $packages): void
+    private function displayLicensesFallback(
-    {
+        array $packages,
+        array $filterOptions = [],
+        int $currentFilterProduct = 0,
+        string $currentFilterDomain = ''
+    ): void {
+        $isFiltered = $currentFilterProduct > 0 || !empty($currentFilterDomain);
+        $licensesUrl = wc_get_account_endpoint_url('licenses');
+
+        // Display filter form if we have filter options
+        if (!empty($filterOptions['products']) || !empty($filterOptions['domains'])) {
+            ?>
+            <div class="wclp-filter-form">
+                <form method="get" action="<?php echo esc_url($licensesUrl); ?>">
+                    <div class="wclp-filter-row">
+                        <?php if (!empty($filterOptions['products'])): ?>
+                            <div class="wclp-filter-field">
+                                <label for="filter_product"><?php esc_html_e('Product', 'wc-licensed-product'); ?></label>
+                                <select name="filter_product" id="filter_product">
+                                    <option value=""><?php esc_html_e('All Products', 'wc-licensed-product'); ?></option>
+                                    <?php foreach ($filterOptions['products'] as $id => $name): ?>
+                                        <option value="<?php echo esc_attr($id); ?>" <?php selected($currentFilterProduct, $id); ?>>
+                                            <?php echo esc_html($name); ?>
+                                        </option>
+                                    <?php endforeach; ?>
+                                </select>
+                            </div>
+                        <?php endif; ?>
+
+                        <?php if (!empty($filterOptions['domains'])): ?>
+                            <div class="wclp-filter-field">
+                                <label for="filter_domain"><?php esc_html_e('Domain', 'wc-licensed-product'); ?></label>
+                                <select name="filter_domain" id="filter_domain">
+                                    <option value=""><?php esc_html_e('All Domains', 'wc-licensed-product'); ?></option>
+                                    <?php foreach ($filterOptions['domains'] as $domain): ?>
+                                        <option value="<?php echo esc_attr($domain); ?>" <?php selected($currentFilterDomain, $domain); ?>>
+                                            <?php echo esc_html($domain); ?>
+                                        </option>
+                                    <?php endforeach; ?>
+                                </select>
+                            </div>
+                        <?php endif; ?>
+
+                        <div class="wclp-filter-actions">
+                            <button type="submit" class="button"><?php esc_html_e('Filter', 'wc-licensed-product'); ?></button>
+                            <?php if ($isFiltered): ?>
+                                <a href="<?php echo esc_url($licensesUrl); ?>" class="button"><?php esc_html_e('Clear', 'wc-licensed-product'); ?></a>
+                            <?php endif; ?>
+                        </div>
+                    </div>
+                </form>
+            </div>
+            <?php
+        }
+
         if (empty($packages)) {
-            echo '<p>' . esc_html__('You have no licenses yet.', 'wc-licensed-product') . '</p>';
+            if ($isFiltered) {
+                echo '<p>' . esc_html__('No licenses found matching your filters.', 'wc-licensed-product') . '</p>';
+            } else {
+                echo '<p>' . esc_html__('You have no licenses yet.', 'wc-licensed-product') . '</p>';
+            }
             return;
         }
 

src/Installer.php

@@ -31,6 +31,7 @@ final class Installer
     {
         self::createTables();
         self::createCacheDir();
+        self::registerProductTypes();
 
         // Set version in options
         update_option('wc_licensed_product_version', WC_LICENSED_PRODUCT_VERSION);
@@ -43,6 +44,28 @@ final class Installer
         flush_rewrite_rules();
     }
 
+    /**
+     * Register custom product type terms in the product_type taxonomy
+     * This is required for WC_Product_Factory::get_product_type() to work correctly
+     */
+    public static function registerProductTypes(): void
+    {
+        // Ensure WooCommerce taxonomies are registered
+        if (!taxonomy_exists('product_type')) {
+            return;
+        }
+
+        // Register 'licensed' product type term if it doesn't exist
+        if (!term_exists('licensed', 'product_type')) {
+            wp_insert_term('licensed', 'product_type');
+        }
+
+        // Register 'licensed-variable' product type term if it doesn't exist
+        if (!term_exists('licensed-variable', 'product_type')) {
+            wp_insert_term('licensed-variable', 'product_type');
+        }
+    }
+
     /**
      * Run on plugin deactivation
      */

src/License/LicenseManager.php

@@ -37,10 +37,18 @@ class LicenseManager
             return true;
         }
 
+        // Check for our custom variation class
+        if ($product instanceof LicensedProductVariation) {
+            return true;
+        }
+
         // Variation of a licensed-variable product
-        if ($product->is_type('variation') && $product->get_parent_id()) {
+        // Use WC_Product_Factory::get_product_type() for reliable parent type check
-            $parent = wc_get_product($product->get_parent_id());
+        // This queries the database directly and doesn't depend on product class loading
-            if ($parent && $parent->is_type('licensed-variable')) {
+        $parentId = $product->get_parent_id();
+        if ($parentId) {
+            $parentType = \WC_Product_Factory::get_product_type($parentId);
+            if ($parentType === 'licensed-variable') {
                 return true;
             }
         }
@@ -101,10 +109,10 @@ class LicenseManager
         // For variations, load the variation; otherwise load the parent product
         if ($variationId) {
             $settingsProduct = wc_get_product($variationId);
-            $parentProduct = wc_get_product($productId);
 
-            // Verify parent is licensed-variable
+            // Verify parent is licensed-variable using DB-level type check
-            if (!$parentProduct || !$parentProduct->is_type('licensed-variable')) {
+            $parentType = \WC_Product_Factory::get_product_type($productId);
+            if ($parentType !== 'licensed-variable') {
                 return null;
             }
 

src/Plugin.php

@@ -17,6 +17,7 @@ use Jeremias\WcLicensedProduct\Admin\SettingsController;
 use Jeremias\WcLicensedProduct\Admin\VersionAdminController;
 use Jeremias\WcLicensedProduct\Api\ResponseSigner;
 use Jeremias\WcLicensedProduct\Api\RestApiController;
+use Jeremias\WcLicensedProduct\Api\UpdateController;
 use Jeremias\WcLicensedProduct\Checkout\CheckoutBlocksIntegration;
 use Jeremias\WcLicensedProduct\Checkout\CheckoutController;
 use Jeremias\WcLicensedProduct\Checkout\StoreApiExtension;
@@ -27,6 +28,7 @@ use Jeremias\WcLicensedProduct\License\LicenseManager;
 use Jeremias\WcLicensedProduct\License\PluginLicenseChecker;
 use Jeremias\WcLicensedProduct\Product\LicensedProductType;
 use Jeremias\WcLicensedProduct\Product\VersionManager;
+use Jeremias\WcLicensedProduct\Update\PluginUpdateChecker;
 use Twig\Environment;
 use Twig\Loader\FilesystemLoader;
 
@@ -139,8 +141,9 @@ final class Plugin
             new AccountController($this->twig, $this->licenseManager, $this->versionManager, $this->downloadController);
         }
 
-        // Always initialize REST API and email controller
+        // Always initialize REST API, update API, and email controller
         new RestApiController($this->licenseManager);
+        new UpdateController($this->licenseManager, $this->versionManager);
         new LicenseEmailController($this->licenseManager);
 
         // Initialize response signing if server secret is configured
@@ -162,6 +165,12 @@ final class Plugin
                 add_action('admin_notices', [$this, 'showUnlicensedNotice']);
             }
         }
+
+        // Initialize update checker if license server is configured (client-side updates)
+        $serverUrl = SettingsController::getPluginLicenseServerUrl();
+        if (!empty($serverUrl) && !$licenseChecker->isSelfLicensing()) {
+            PluginUpdateChecker::getInstance()->register();
+        }
     }
 
     /**
@@ -210,6 +219,7 @@ final class Plugin
 
         // Try new multi-domain format first
         $domainData = $order->get_meta('_licensed_product_domains');
+
         if (!empty($domainData) && is_array($domainData)) {
             $this->generateLicensesMultiDomain($order, $domainData);
             return;
@@ -244,7 +254,12 @@ final class Plugin
         // Generate licenses for each licensed product
         foreach ($order->get_items() as $item) {
             $product = $item->get_product();
-            if (!$product || !$this->licenseManager->isLicensedProduct($product)) {
+
+            if (!$product) {
+                continue;
+            }
+
+            if (!$this->licenseManager->isLicensedProduct($product)) {
                 continue;
             }
 
@@ -278,12 +293,14 @@ final class Plugin
     private function generateLicensesSingleDomain(\WC_Order $order): void
     {
         $domain = $order->get_meta('_licensed_product_domain');
+
         if (empty($domain)) {
             return;
         }
 
         foreach ($order->get_items() as $item) {
             $product = $item->get_product();
+
             if ($product && $this->licenseManager->isLicensedProduct($product)) {
                 // Get the parent product ID (for variations, this is the main product)
                 $productId = $product->is_type('variation') ? $product->get_parent_id() : $product->get_id();

src/Product/LicensedProductType.php

@@ -30,6 +30,9 @@ final class LicensedProductType
      */
     private function registerHooks(): void
     {
+        // Ensure product type terms exist in taxonomy (for WC_Product_Factory::get_product_type())
+        add_action('woocommerce_init', [$this, 'ensureProductTypeTermsExist']);
+
         // Register product types
         add_filter('product_type_selector', [$this, 'addProductType']);
         add_filter('woocommerce_product_class', [$this, 'getProductClass'], 10, 4);
@@ -74,6 +77,15 @@ final class LicensedProductType
         add_action('admin_footer', [$this, 'addVariableProductScripts']);
     }
 
+    /**
+     * Ensure product type terms exist in the product_type taxonomy
+     * This is required for WC_Product_Factory::get_product_type() to work correctly
+     */
+    public function ensureProductTypeTermsExist(): void
+    {
+        \Jeremias\WcLicensedProduct\Installer::registerProductTypes();
+    }
+
     /**
      * Add product types to selector
      */
@@ -129,15 +141,23 @@ final class LicensedProductType
 
     /**
      * Add product data tab for license settings
+     * Also modify variations tab to show for licensed-variable products
      */
     public function addProductDataTab(array $tabs): array
     {
+        // Add our License Settings tab
         $tabs['licensed_product'] = [
             'label' => __('License Settings', 'wc-licensed-product'),
             'target' => 'licensed_product_data',
             'class' => ['show_if_licensed', 'show_if_licensed-variable'],
             'priority' => 21,
         ];
+
+        // Make Variations tab also show for licensed-variable products
+        if (isset($tabs['variations'])) {
+            $tabs['variations']['class'][] = 'show_if_licensed-variable';
+        }
+
         return $tabs;
     }
 
@@ -227,35 +247,6 @@ final class LicensedProductType
                 ?>
             </div>
         </div>
-        <script type="text/javascript">
-            jQuery(document).ready(function($) {
-                // Show/hide panels based on product type for license settings tab
-                function toggleLicensedProductOptions() {
-                    var productType = $('#product-type').val();
-                    var isLicensed = productType === 'licensed';
-                    var isLicensedVariable = productType === 'licensed-variable';
-
-                    if (isLicensed || isLicensedVariable) {
-                        // Show license settings tab
-                        $('.show_if_licensed').show();
-                        $('.show_if_licensed-variable').show();
-                        $('.general_options').show();
-                        $('.pricing').show();
-                        $('.general_tab').show();
-                    } else {
-                        // Hide license settings tab for other product types
-                        $('.show_if_licensed').hide();
-                        $('.show_if_licensed-variable').hide();
-                    }
-                }
-
-                // Initial state on page load
-                toggleLicensedProductOptions();
-
-                // On product type change
-                $('#product-type').on('change', toggleLicensedProductOptions);
-            });
-        </script>
         <?php
     }
 
@@ -642,7 +633,8 @@ final class LicensedProductType
     }
 
     /**
-     * Add JavaScript for licensed-variable product type in admin
+     * Add JavaScript for licensed product types in admin
+     * Handles visibility of License Settings tab and Product Versions meta box
      */
     public function addVariableProductScripts(): void
     {
@@ -659,60 +651,63 @@ final class LicensedProductType
         ?>
         <script type="text/javascript">
             jQuery(document).ready(function($) {
-                // Show/hide panels based on product type
+                // Handle our custom License Settings tab, Product Versions meta box,
-                function toggleLicensedVariableOptions() {
+                // and show_if_licensed-variable elements
+                function toggleOurElements() {
                     var productType = $('#product-type').val();
+                    var isLicensed = productType === 'licensed';
+                    var isLicensedVariable = productType === 'licensed-variable';
 
-                    if (productType === 'licensed-variable') {
+                    // License Settings tab - use CSS class for visibility
-                        // Show variable product options
+                    var $licenseTab = $('li.licensed_product_options');
+                    if (isLicensed || isLicensedVariable) {
+                        $licenseTab.addClass('wclp-active');
+                    } else {
+                        $licenseTab.removeClass('wclp-active');
+                        // If License Settings panel is active, switch to General tab
+                        if ($('#licensed_product_data').is(':visible')) {
+                            $('li.general_options a').trigger('click');
+                        }
+                    }
+
+                    // Product Versions meta box
+                    var $metaBox = $('#wc_licensed_product_versions');
+                    if (isLicensed || isLicensedVariable) {
+                        $metaBox.css('display', '');
+                    } else {
+                        $metaBox.css('display', 'none');
+                    }
+
+                    // Handle show_if_licensed-variable elements (like Variations tab)
+                    // WooCommerce doesn't know about our custom product types
+                    if (isLicensedVariable) {
+                        $('.show_if_licensed-variable').show();
+                        // Also show elements that should be visible for variable products
+                        // since licensed-variable is a variable product type
                         $('.show_if_variable').show();
                         $('.hide_if_variable').hide();
-
+                    } else {
-                        // Show licensed product options
+                        // Let WooCommerce handle show_if_variable elements
-                        $('.show_if_licensed-variable').show();
+                        // We only need to hide our custom class when not licensed-variable
-                        $('.show_if_licensed').show();
+                        // Don't hide show_if_licensed-variable when it's licensed (simple)
-
+                        if (!isLicensed) {
-                        // Show general and variations tabs
+                            $('.show_if_licensed-variable').not('.show_if_licensed').hide();
-                        $('.general_tab').show();
+                        }
-                        $('.variations_tab').show();
-                        $('.variations_options').show();
-
-                        // Hide shipping tab (virtual products)
-                        $('.shipping_tab').hide();
-
-                        // Ensure the variations panel can be displayed
-                        $('#variable_product_options').show();
                     }
                 }
 
-                // Initial check
+                // Initial setup - run after WooCommerce has initialized
-                toggleLicensedVariableOptions();
+                setTimeout(toggleOurElements, 10);
 
-                // On product type change
+                // On product type change - run after WooCommerce has processed
                 $('#product-type').on('change', function() {
-                    // Use setTimeout to let WooCommerce finish its own processing first
+                    setTimeout(toggleOurElements, 100);
-                    setTimeout(toggleLicensedVariableOptions, 100);
                 });
 
-                // Re-apply after WooCommerce AJAX operations that may reset visibility
+                // Re-apply after WooCommerce AJAX operations
-                $(document).on('woocommerce_variations_loaded', toggleLicensedVariableOptions);
+                $(document).on('woocommerce_variations_loaded woocommerce_variations_added woocommerce_variations_saved', function() {
-                $(document).on('woocommerce_variations_added', toggleLicensedVariableOptions);
+                    setTimeout(toggleOurElements, 10);
-                $(document).on('woocommerce_variations_saved', toggleLicensedVariableOptions);
-
-                // Handle AJAX complete events for attribute saving
-                $(document).ajaxComplete(function(event, xhr, settings) {
-                    // Check if this was a product data save or attribute action
-                    if (settings.data && (
-                        settings.data.indexOf('action=woocommerce_save_attributes') !== -1 ||
-                        settings.data.indexOf('action=woocommerce_load_variations') !== -1 ||
-                        settings.data.indexOf('action=woocommerce_add_variation') !== -1
-                    )) {
-                        setTimeout(toggleLicensedVariableOptions, 100);
-                    }
                 });
-
-                // Also listen for the WooCommerce product type show/hide trigger
-                $('body').on('woocommerce-product-type-change', toggleLicensedVariableOptions);
             });
         </script>
         <?php

src/Update/PluginUpdateChecker.php

@@ -0,0 +1,439 @@
+<?php
+/**
+ * Plugin Update Checker
+ *
+ * Checks for plugin updates from the configured license server.
+ *
+ * @package Jeremias\WcLicensedProduct\Update
+ */
+
+declare(strict_types=1);
+
+namespace Jeremias\WcLicensedProduct\Update;
+
+use Jeremias\WcLicensedProduct\Admin\SettingsController;
+use Jeremias\WcLicensedProduct\License\PluginLicenseChecker;
+use Symfony\Component\HttpClient\HttpClient;
+
+/**
+ * Handles checking for plugin updates from the license server
+ *
+ * This class hooks into WordPress's native plugin update system to check for
+ * updates from the configured license server. It validates the license and
+ * provides download authentication.
+ */
+final class PluginUpdateChecker
+{
+    /**
+     * Cache key for update info
+     */
+    private const CACHE_KEY = 'wclp_update_info';
+
+    /**
+     * Default cache TTL (12 hours)
+     */
+    private const DEFAULT_CACHE_TTL = 43200;
+
+    /**
+     * Singleton instance
+     */
+    private static ?self $instance = null;
+
+    /**
+     * Plugin slug
+     */
+    private string $pluginSlug;
+
+    /**
+     * Plugin basename (slug/slug.php)
+     */
+    private string $pluginBasename;
+
+    /**
+     * Get singleton instance
+     */
+    public static function getInstance(): self
+    {
+        if (self::$instance === null) {
+            self::$instance = new self();
+        }
+
+        return self::$instance;
+    }
+
+    /**
+     * Private constructor for singleton
+     */
+    private function __construct()
+    {
+        $this->pluginSlug = 'wc-licensed-product';
+        $this->pluginBasename = WC_LICENSED_PRODUCT_PLUGIN_BASENAME;
+    }
+
+    /**
+     * Register WordPress hooks for update checking
+     */
+    public function register(): void
+    {
+        // Skip if update notifications are disabled
+        if ($this->isUpdateNotificationDisabled()) {
+            return;
+        }
+
+        // Check for updates
+        add_filter('pre_set_site_transient_update_plugins', [$this, 'checkForUpdates']);
+
+        // Provide plugin information for the update modal
+        add_filter('plugins_api', [$this, 'getPluginInfo'], 10, 3);
+
+        // Add authentication headers to download requests
+        add_filter('http_request_args', [$this, 'addAuthHeaders'], 10, 2);
+
+        // Handle auto-install setting
+        add_filter('auto_update_plugin', [$this, 'handleAutoInstall'], 10, 2);
+
+        // Clear cache on settings save
+        add_action('update_option_wc_licensed_product_plugin_license_key', [$this, 'clearCache']);
+        add_action('update_option_wc_licensed_product_plugin_license_server_url', [$this, 'clearCache']);
+        add_action('update_option_wc_licensed_product_update_notification_enabled', [$this, 'clearCache']);
+    }
+
+    /**
+     * Check if update notifications are disabled
+     */
+    private function isUpdateNotificationDisabled(): bool
+    {
+        // Check constant
+        if (defined('WC_LICENSE_DISABLE_AUTO_UPDATE') && WC_LICENSE_DISABLE_AUTO_UPDATE) {
+            return true;
+        }
+
+        // Check setting
+        return !SettingsController::isUpdateNotificationEnabled();
+    }
+
+    /**
+     * Handle auto-install setting for WordPress automatic updates
+     *
+     * @param bool|null $update The update decision
+     * @param object $item The plugin update object
+     * @return bool|null Whether to auto-update this plugin
+     */
+    public function handleAutoInstall($update, $item): ?bool
+    {
+        // Only handle our plugin
+        if (!isset($item->plugin) || $item->plugin !== $this->pluginBasename) {
+            return $update;
+        }
+
+        // Return true to enable auto-install, false to disable, or null to use default
+        return SettingsController::isAutoInstallEnabled() ? true : $update;
+    }
+
+    /**
+     * Check for plugin updates
+     *
+     * @param object $transient The update_plugins transient
+     * @return object Modified transient
+     */
+    public function checkForUpdates($transient)
+    {
+        if (empty($transient->checked)) {
+            return $transient;
+        }
+
+        // Get cached update info or fetch fresh
+        $updateInfo = $this->getUpdateInfo();
+
+        if (!$updateInfo || !isset($updateInfo['update_available']) || !$updateInfo['update_available']) {
+            return $transient;
+        }
+
+        // Compare versions
+        $currentVersion = $transient->checked[$this->pluginBasename] ?? WC_LICENSED_PRODUCT_VERSION;
+
+        if (version_compare($updateInfo['version'], $currentVersion, '>')) {
+            $transient->response[$this->pluginBasename] = $this->buildUpdateObject($updateInfo);
+        }
+
+        return $transient;
+    }
+
+    /**
+     * Get plugin information for the update modal
+     *
+     * @param false|object|array $result The result object or array
+     * @param string $action The API action
+     * @param object $args Request arguments
+     * @return false|object
+     */
+    public function getPluginInfo($result, string $action, object $args)
+    {
+        if ($action !== 'plugin_information') {
+            return $result;
+        }
+
+        if (!isset($args->slug) || $args->slug !== $this->pluginSlug) {
+            return $result;
+        }
+
+        // Get update info
+        $updateInfo = $this->getUpdateInfo(true);
+
+        if (!$updateInfo) {
+            return $result;
+        }
+
+        return $this->buildPluginInfoObject($updateInfo);
+    }
+
+    /**
+     * Add authentication headers to download requests
+     *
+     * @param array $args HTTP request arguments
+     * @param string $url Request URL
+     * @return array Modified arguments
+     */
+    public function addAuthHeaders(array $args, string $url): array
+    {
+        // Only modify requests to our license server
+        $serverUrl = $this->getLicenseServerUrl();
+        if (empty($serverUrl) || strpos($url, parse_url($serverUrl, PHP_URL_HOST)) === false) {
+            return $args;
+        }
+
+        // Only modify download requests
+        if (strpos($url, 'license-download') === false) {
+            return $args;
+        }
+
+        // Add license key to headers for potential server-side verification
+        $licenseKey = $this->getLicenseKey();
+        if (!empty($licenseKey)) {
+            $args['headers']['X-License-Key'] = $licenseKey;
+        }
+
+        return $args;
+    }
+
+    /**
+     * Get update info from cache or server
+     *
+     * @param bool $forceRefresh Force refresh from server
+     * @return array|null Update info or null if unavailable
+     */
+    public function getUpdateInfo(bool $forceRefresh = false): ?array
+    {
+        // Check cache unless force refresh
+        if (!$forceRefresh) {
+            $cached = get_transient(self::CACHE_KEY);
+            if ($cached !== false) {
+                return $cached;
+            }
+        }
+
+        // Fetch from server
+        $updateInfo = $this->fetchUpdateInfo();
+
+        if ($updateInfo) {
+            // Cache the result
+            $cacheTtl = $this->getCacheTtl();
+            set_transient(self::CACHE_KEY, $updateInfo, $cacheTtl);
+        }
+
+        return $updateInfo;
+    }
+
+    /**
+     * Fetch update info from the license server
+     */
+    private function fetchUpdateInfo(): ?array
+    {
+        $serverUrl = $this->getLicenseServerUrl();
+        $licenseKey = $this->getLicenseKey();
+
+        if (empty($serverUrl) || empty($licenseKey)) {
+            return null;
+        }
+
+        try {
+            $httpClient = HttpClient::create([
+                'timeout' => 15,
+                'verify_peer' => true,
+            ]);
+
+            $updateCheckUrl = rtrim($serverUrl, '/') . '/wp-json/wc-licensed-product/v1/update-check';
+
+            $response = $httpClient->request('POST', $updateCheckUrl, [
+                'json' => [
+                    'license_key' => $licenseKey,
+                    'domain' => $this->getCurrentDomain(),
+                    'plugin_slug' => $this->pluginSlug,
+                    'current_version' => WC_LICENSED_PRODUCT_VERSION,
+                ],
+            ]);
+
+            if ($response->getStatusCode() !== 200) {
+                return null;
+            }
+
+            $data = $response->toArray();
+
+            // Verify response structure
+            if (!isset($data['success']) || !$data['success']) {
+                return null;
+            }
+
+            return $data;
+        } catch (\Throwable $e) {
+            // Log error but don't break the site
+            if (defined('WP_DEBUG') && WP_DEBUG) {
+                error_log('WC Licensed Product: Update check failed - ' . $e->getMessage());
+            }
+            return null;
+        }
+    }
+
+    /**
+     * Build WordPress update object for transient
+     */
+    private function buildUpdateObject(array $updateInfo): object
+    {
+        $update = new \stdClass();
+        $update->id = $this->pluginSlug;
+        $update->slug = $updateInfo['slug'] ?? $this->pluginSlug;
+        $update->plugin = $this->pluginBasename;
+        $update->new_version = $updateInfo['version'];
+        $update->url = $updateInfo['homepage'] ?? '';
+        $update->package = $updateInfo['download_url'] ?? $updateInfo['package'] ?? '';
+
+        if (isset($updateInfo['tested'])) {
+            $update->tested = $updateInfo['tested'];
+        }
+
+        if (isset($updateInfo['requires'])) {
+            $update->requires = $updateInfo['requires'];
+        }
+
+        if (isset($updateInfo['requires_php'])) {
+            $update->requires_php = $updateInfo['requires_php'];
+        }
+
+        if (isset($updateInfo['icons'])) {
+            $update->icons = $updateInfo['icons'];
+        }
+
+        return $update;
+    }
+
+    /**
+     * Build plugin info object for plugins_api
+     */
+    private function buildPluginInfoObject(array $updateInfo): object
+    {
+        $info = new \stdClass();
+        $info->name = $updateInfo['name'] ?? 'WC Licensed Product';
+        $info->slug = $updateInfo['slug'] ?? $this->pluginSlug;
+        $info->version = $updateInfo['version'];
+        $info->author = '<a href="https://src.bundespruefstelle.ch/magdev">Marco Graetsch</a>';
+        $info->homepage = $updateInfo['homepage'] ?? '';
+        $info->requires = $updateInfo['requires'] ?? '6.0';
+        $info->tested = $updateInfo['tested'] ?? '';
+        $info->requires_php = $updateInfo['requires_php'] ?? '8.3';
+        $info->downloaded = 0;
+        $info->last_updated = $updateInfo['last_updated'] ?? '';
+        $info->download_link = $updateInfo['download_url'] ?? $updateInfo['package'] ?? '';
+
+        // Sections for the modal
+        $info->sections = [];
+
+        if (isset($updateInfo['sections']['description'])) {
+            $info->sections['description'] = $updateInfo['sections']['description'];
+        } else {
+            $info->sections['description'] = __(
+                'WooCommerce plugin for selling licensed software products with domain-bound license keys.',
+                'wc-licensed-product'
+            );
+        }
+
+        if (isset($updateInfo['sections']['changelog']) || isset($updateInfo['changelog'])) {
+            $info->sections['changelog'] = $updateInfo['sections']['changelog'] ?? $updateInfo['changelog'];
+        }
+
+        // Banners and icons
+        if (isset($updateInfo['banners'])) {
+            $info->banners = $updateInfo['banners'];
+        }
+
+        if (isset($updateInfo['icons'])) {
+            $info->icons = $updateInfo['icons'];
+        }
+
+        return $info;
+    }
+
+    /**
+     * Clear the update cache
+     */
+    public function clearCache(): void
+    {
+        delete_transient(self::CACHE_KEY);
+    }
+
+    /**
+     * Get cache TTL from settings or default
+     */
+    private function getCacheTtl(): int
+    {
+        $hours = (int) get_option('wc_licensed_product_update_check_frequency', 12);
+        return max(1, $hours) * HOUR_IN_SECONDS;
+    }
+
+    /**
+     * Get the license server URL from settings
+     */
+    private function getLicenseServerUrl(): string
+    {
+        // Check constant override first
+        if (defined('WC_LICENSE_UPDATE_CHECK_URL') && WC_LICENSE_UPDATE_CHECK_URL) {
+            return WC_LICENSE_UPDATE_CHECK_URL;
+        }
+
+        return (string) get_option('wc_licensed_product_plugin_license_server_url', '');
+    }
+
+    /**
+     * Get the license key from settings
+     */
+    private function getLicenseKey(): string
+    {
+        return (string) get_option('wc_licensed_product_plugin_license_key', '');
+    }
+
+    /**
+     * Get the current domain from the site URL
+     */
+    private function getCurrentDomain(): string
+    {
+        $siteUrl = get_site_url();
+        $parsed = parse_url($siteUrl);
+        $host = $parsed['host'] ?? 'localhost';
+
+        if (isset($parsed['port'])) {
+            $host .= ':' . $parsed['port'];
+        }
+
+        return strtolower($host);
+    }
+
+    /**
+     * Force an immediate update check
+     *
+     * Useful for admin interfaces where user clicks "Check for updates"
+     */
+    public function forceUpdateCheck(): ?array
+    {
+        $this->clearCache();
+        return $this->getUpdateInfo(true);
+    }
+}

templates/admin/licenses.html.twig

@@ -424,12 +424,11 @@
                     if (result.valid) {
                         html = '<div class="notice notice-success inline"><p><strong>✓ {{ __('License is VALID') }}</strong></p></div>';
                         html += '<table class="widefat striped"><tbody>';
-                        html += '<tr><th>{{ __('Product') }}</th><td>' + escapeHtml(result.product_name || '-') + '</td></tr>';
+                        html += '<tr><th>{{ __('Product') }}</th><td><strong>' + escapeHtml(result.product_name || '-') + '</strong></td></tr>';
-                        html += '<tr><th>{{ __('Version') }}</th><td>' + escapeHtml(result.version || '-') + '</td></tr>';
                         if (result.expires_at) {
                             html += '<tr><th>{{ __('Expires') }}</th><td>' + escapeHtml(result.expires_at) + '</td></tr>';
                         } else {
-                            html += '<tr><th>{{ __('Expires') }}</th><td>{{ __('Lifetime') }}</td></tr>';
+                            html += '<tr><th>{{ __('Expires') }}</th><td><span class="license-lifetime">{{ __('Lifetime') }}</span></td></tr>';
                         }
                         html += '</tbody></table>';
                     } else {

templates/frontend/licenses.html.twig

@@ -1,5 +1,53 @@
+{# License Filter Form #}
+{% if filter_products is defined and filter_products|length > 0 or filter_domains is defined and filter_domains|length > 0 %}
+    <div class="wclp-filter-form">
+        <form method="get" action="{{ esc_url(licenses_url) }}">
+            <div class="wclp-filter-row">
+                {% if filter_products is defined and filter_products|length > 0 %}
+                    <div class="wclp-filter-field">
+                        <label for="filter_product">{{ __('Product') }}</label>
+                        <select name="filter_product" id="filter_product">
+                            <option value="">{{ __('All Products') }}</option>
+                            {% for id, name in filter_products %}
+                                <option value="{{ id }}" {{ current_filter_product == id ? 'selected' : '' }}>
+                                    {{ esc_html(name) }}
+                                </option>
+                            {% endfor %}
+                        </select>
+                    </div>
+                {% endif %}
+
+                {% if filter_domains is defined and filter_domains|length > 0 %}
+                    <div class="wclp-filter-field">
+                        <label for="filter_domain">{{ __('Domain') }}</label>
+                        <select name="filter_domain" id="filter_domain">
+                            <option value="">{{ __('All Domains') }}</option>
+                            {% for domain in filter_domains %}
+                                <option value="{{ esc_attr(domain) }}" {{ current_filter_domain == domain ? 'selected' : '' }}>
+                                    {{ esc_html(domain) }}
+                                </option>
+                            {% endfor %}
+                        </select>
+                    </div>
+                {% endif %}
+
+                <div class="wclp-filter-actions">
+                    <button type="submit" class="button">{{ __('Filter') }}</button>
+                    {% if is_filtered %}
+                        <a href="{{ esc_url(licenses_url) }}" class="button">{{ __('Clear') }}</a>
+                    {% endif %}
+                </div>
+            </div>
+        </form>
+    </div>
+{% endif %}
+
 {% if not has_packages %}
-    <p>{{ __('You have no licenses yet.') }}</p>
+    {% if is_filtered %}
+        <p>{{ __('No licenses found matching your filters.') }}</p>
+    {% else %}
+        <p>{{ __('You have no licenses yet.') }}</p>
+    {% endif %}
 {% else %}
     <div class="woocommerce-licenses">
         {% for package in packages %}

wc-licensed-product.php

@@ -3,7 +3,7 @@
  * Plugin Name: WooCommerce Licensed Product
  * Plugin URI: https://src.bundespruefstelle.ch/magdev/wc-licensed-product
  * Description: WooCommerce plugin to sell software products using license keys with domain-based validation.
- * Version: 0.5.12
+ * Version: 0.6.1
  * Author: Marco Graetsch
  * Author URI: https://src.bundespruefstelle.ch/magdev
  * License: GPL-2.0-or-later
@@ -28,7 +28,7 @@ if (!defined('ABSPATH')) {
 }
 
 // Plugin constants
-define('WC_LICENSED_PRODUCT_VERSION', '0.5.12');
+define('WC_LICENSED_PRODUCT_VERSION', '0.6.1');
 define('WC_LICENSED_PRODUCT_PLUGIN_FILE', __FILE__);
 define('WC_LICENSED_PRODUCT_PLUGIN_DIR', plugin_dir_path(__FILE__));
 define('WC_LICENSED_PRODUCT_PLUGIN_URL', plugin_dir_url(__FILE__));