Fix frontend error on licensed variable products without attributes (v0.5.9)

- Added null checks for get_variation_attributes(), get_available_variations(), get_default_attributes()
- Show informative message when product has no variations configured
- Changed product type check from instanceof to is_type() for better compatibility

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

CHANGELOG.md

@@ -7,6 +7,30 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.9] - 2026-01-27
+
+### Fixed
+
+- Fixed frontend error on licensed variable products when no attributes are defined
+- Added null checks for `get_variation_attributes()`, `get_available_variations()`, and `get_default_attributes()`
+- Show informative message instead of error when product has no variations configured
+- Changed product type check from `instanceof` to `is_type()` for better compatibility
+
+## [0.5.8] - 2026-01-27
+
+### Fixed
+
+- **CRITICAL:** Fixed critical error on frontend product pages for licensed variable products
+- Variable product add-to-cart template now passes required variables (`available_variations`, `attributes`, `selected_attributes`)
+- Variants tab no longer disappears when saving attributes on licensed variable products
+- Added WooCommerce AJAX event listeners to maintain tab visibility during attribute operations
+
+### Changed
+
+- Improved JavaScript event handling for licensed-variable product type in admin
+- Added listeners for `woocommerce_variations_loaded`, `woocommerce_variations_added`, `woocommerce_variations_saved` events
+- Added AJAX complete handler for attribute save operations
+
 ## [0.5.7] - 2026-01-27
 
 ### Changed

CLAUDE.md

@@ -1437,3 +1437,61 @@ Critical bug fix for response signing. The key derivation algorithm was incompat
   - Length: 32 bytes (256 bits)
   - Info: license_key (context-specific info)
 - **Breaking change for existing signatures** - customer secrets will change after upgrade
+
+### 2026-01-27 - Version 0.5.6 - License Settings Tab Visibility Fix
+
+**Overview:**
+
+Fixed License Settings tab visibility for non-licensed product types and updated README with v0.5.x features.
+
+**Bug Fix:**
+
+- License Settings tab now only shows for Licensed Product and Licensed Variable Product types
+- Previously the tab was visible on all product types due to CSS `!important` override forcing `display: block`
+
+**Modified files:**
+
+- `assets/css/admin.css` - Changed from `display: block !important` to `display: none` for `.show_if_licensed` and `.show_if_licensed-variable`
+- `src/Product/LicensedProductType.php` - Added consolidated `toggleLicensedProductOptions()` JavaScript function
+- `README.md` - Updated with complete feature documentation for v0.5.x features
+
+**Technical notes:**
+
+- CSS now hides License Settings tab by default
+- JavaScript `toggleLicensedProductOptions()` function shows/hides tab based on product type selector
+- Function is called both on page load and on product type change
+- README updated with: Variable Licensed Products, Multi-Domain Licensing, Per-License Secrets, Download Statistics, Configurable Rate Limiting
+
+**Release v0.5.6:**
+
+- Created release package: `releases/wc-licensed-product-0.5.6.zip` (1.1 MB)
+- SHA256: `4d35a319fe4cb4e7055bae17fc030487ca05e5e9ac905f76d0ac62002bde4336`
+- Tagged as `v0.5.6` and pushed to `main` branch
+
+### 2026-01-27 - Version 0.5.7 - Settings UI Cleanup
+
+**Overview:**
+
+Removed redundant "Default" prefix from setting labels on the Default Settings page for cleaner UI.
+
+**Changed:**
+
+- "Max Activations" (was "Default Max Activations")
+- "License Validity (Days)" (was "Default License Validity (Days)")
+- "Bind to Major Version" (was "Default Bind to Major Version")
+
+**Modified files:**
+
+- `src/Admin/SettingsController.php` - Removed "Default" prefix from three setting labels
+
+**Technical notes:**
+
+- Labels are cleaner since the page section itself is already named "Default Settings"
+- No functional changes, purely UI improvement
+- Updated all translations (388 strings)
+
+**Release v0.5.7:**
+
+- Created release package: `releases/wc-licensed-product-0.5.7.zip` (856 KB)
+- SHA256: `ceb4d57598f576f4f172153ff80df8c180ecd4dca873cf109327fc5ac718930f`
+- Tagged as `v0.5.7` and pushed to `main` branch

languages/wc-licensed-product-de_CH.po

@@ -5,7 +5,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: WC Licensed Product 0.5.0\n"
 "Report-Msgid-Bugs-To: magdev3.0@gmail.com\n"
-"POT-Creation-Date: 2026-01-27 11:54+0100\n"
+"POT-Creation-Date: 2026-01-27 13:34+0100\n"
 "PO-Revision-Date: 2026-01-25T18:30:00+00:00\n"
 "Last-Translator: Marco Graetsch <magdev3.0@gmail.com>\n"
 "Language-Team: German (Switzerland) <de_CH@li.org>\n"
@@ -314,7 +314,7 @@ msgstr "Speichern"
 #: src/Product/LicensedProductVariation.php:139
 #: src/Product/LicensedProductType.php:136
 #: src/Product/LicensedProductType.php:184
-#: src/Product/LicensedProductType.php:385
+#: src/Product/LicensedProductType.php:403
 #: src/Frontend/AccountController.php:286
 msgid "Lifetime"
 msgstr "Lebenslang"
@@ -1167,7 +1167,7 @@ msgstr ""
 "Individuelle Produkteinstellungen überschreiben diese Standards."
 
 #: src/Admin/SettingsController.php:176 src/Product/LicensedProductType.php:154
-#: src/Product/LicensedProductType.php:402
+#: src/Product/LicensedProductType.php:420
 msgid "Max Activations"
 msgstr "Max. Aktivierungen"
 
@@ -1475,7 +1475,7 @@ msgid "License Settings"
 msgstr "Lizenz-Einstellungen"
 
 #: src/Product/LicensedProductType.php:135
-#: src/Product/LicensedProductType.php:384
+#: src/Product/LicensedProductType.php:402
 #, php-format
 msgid "%d days"
 msgstr "%d Tage"
@@ -1516,27 +1516,27 @@ msgstr "Ja"
 msgid "No"
 msgstr "Nein"
 
-#: src/Product/LicensedProductType.php:327
+#: src/Product/LicensedProductType.php:329
 msgid "Version:"
 msgstr "Version:"
 
-#: src/Product/LicensedProductType.php:355
+#: src/Product/LicensedProductType.php:373
 msgid "Licensed products are always virtual"
 msgstr "Lizenzierte Produkte sind immer virtuell"
 
-#: src/Product/LicensedProductType.php:357
+#: src/Product/LicensedProductType.php:375
 msgid "Virtual"
 msgstr "Virtuell"
 
-#: src/Product/LicensedProductType.php:390
+#: src/Product/LicensedProductType.php:408
 msgid "License Duration (Days)"
 msgstr "Lizenz-Gültigkeit (Tage)"
 
-#: src/Product/LicensedProductType.php:399
+#: src/Product/LicensedProductType.php:417
 msgid "Leave empty for parent default. 0 = Lifetime."
 msgstr "Leer lassen für übergeordneten Standard. 0 = Lebenslang."
 
-#: src/Product/LicensedProductType.php:411
+#: src/Product/LicensedProductType.php:429
 msgid "Leave empty for parent default."
 msgstr "Leer lassen für übergeordneten Standard."
 

languages/wc-licensed-product.pot

@@ -6,9 +6,9 @@
 #, fuzzy
 msgid ""
 msgstr ""
-"Project-Id-Version: WC Licensed Product 0.5.7\n"
+"Project-Id-Version: WC Licensed Product 0.5.8\n"
 "Report-Msgid-Bugs-To: magdev3.0@gmail.com\n"
-"POT-Creation-Date: 2026-01-27 11:54+0100\n"
+"POT-Creation-Date: 2026-01-27 13:34+0100\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -307,7 +307,7 @@ msgstr ""
 #: src/Product/LicensedProductVariation.php:139
 #: src/Product/LicensedProductType.php:136
 #: src/Product/LicensedProductType.php:184
-#: src/Product/LicensedProductType.php:385
+#: src/Product/LicensedProductType.php:403
 #: src/Frontend/AccountController.php:286
 msgid "Lifetime"
 msgstr ""
@@ -1134,7 +1134,7 @@ msgid ""
 msgstr ""
 
 #: src/Admin/SettingsController.php:176 src/Product/LicensedProductType.php:154
-#: src/Product/LicensedProductType.php:402
+#: src/Product/LicensedProductType.php:420
 msgid "Max Activations"
 msgstr ""
 
@@ -1426,7 +1426,7 @@ msgid "License Settings"
 msgstr ""
 
 #: src/Product/LicensedProductType.php:135
-#: src/Product/LicensedProductType.php:384
+#: src/Product/LicensedProductType.php:402
 #, php-format
 msgid "%d days"
 msgstr ""
@@ -1465,27 +1465,27 @@ msgstr ""
 msgid "No"
 msgstr ""
 
-#: src/Product/LicensedProductType.php:327
+#: src/Product/LicensedProductType.php:329
 msgid "Version:"
 msgstr ""
 
-#: src/Product/LicensedProductType.php:355
+#: src/Product/LicensedProductType.php:373
 msgid "Licensed products are always virtual"
 msgstr ""
 
-#: src/Product/LicensedProductType.php:357
+#: src/Product/LicensedProductType.php:375
 msgid "Virtual"
 msgstr ""
 
-#: src/Product/LicensedProductType.php:390
+#: src/Product/LicensedProductType.php:408
 msgid "License Duration (Days)"
 msgstr ""
 
-#: src/Product/LicensedProductType.php:399
+#: src/Product/LicensedProductType.php:417
 msgid "Leave empty for parent default. 0 = Lifetime."
 msgstr ""
 
-#: src/Product/LicensedProductType.php:411
+#: src/Product/LicensedProductType.php:429
 msgid "Leave empty for parent default."
 msgstr ""
 

releases/wc-licensed-product-0.5.7.zip.sha256

@@ -0,0 +1 @@
+ceb4d57598f576f4f172153ff80df8c180ecd4dca873cf109327fc5ac718930f  wc-licensed-product-0.5.7.zip

releases/wc-licensed-product-0.5.8.zip.sha256

@@ -0,0 +1 @@
+670c2f5182ea7140ccf9533c2b4179daf7890019a244973f467f2a5c7622b9f4  wc-licensed-product-0.5.8.zip

src/Product/LicensedProductType.php

@@ -201,19 +201,21 @@ final class LicensedProductType
         </div>
         <script type="text/javascript">
             jQuery(document).ready(function($) {
-                // Show/hide panels based on product type
+                // 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();
                     }
@@ -334,7 +336,49 @@ final class LicensedProductType
      */
     public function variableAddToCartTemplate(): void
     {
-        wc_get_template('single-product/add-to-cart/variable.php');
+        global $product;
+
+        // Check if product is a variable type (includes LicensedVariableProduct which extends WC_Product_Variable)
+        if (!$product || !$product->is_type('licensed-variable')) {
+            return;
+        }
+
+        // Get attributes - ensure we have an array even if no attributes are set
+        $attributes = $product->get_variation_attributes();
+        if (!is_array($attributes)) {
+            $attributes = [];
+        }
+
+        // If no attributes defined, show a message instead of broken form
+        if (empty($attributes)) {
+            echo '<p class="woocommerce-info">' . esc_html__('This product has no variations available.', 'wc-licensed-product') . '</p>';
+            return;
+        }
+
+        // Get variations count to determine if we should load them via AJAX
+        $children = $product->get_children();
+        $getVariations = count($children) <= apply_filters('woocommerce_ajax_variation_threshold', 30, $product);
+
+        // Get available variations - ensure we have an array
+        $availableVariations = $getVariations ? $product->get_available_variations() : false;
+        if ($getVariations && !is_array($availableVariations)) {
+            $availableVariations = [];
+        }
+
+        // Get default/selected attributes - ensure we have an array
+        $selectedAttributes = $product->get_default_attributes();
+        if (!is_array($selectedAttributes)) {
+            $selectedAttributes = [];
+        }
+
+        wc_get_template(
+            'single-product/add-to-cart/variable.php',
+            [
+                'available_variations' => $availableVariations,
+                'attributes'           => $attributes,
+                'selected_attributes'  => $selectedAttributes,
+            ]
+        );
     }
 
     /**
@@ -507,9 +551,13 @@ final class LicensedProductType
                         // Show general and variations tabs
                         $('.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();
                     }
                 }
 
@@ -518,8 +566,29 @@ final class LicensedProductType
 
                 // On product type change
                 $('#product-type').on('change', function() {
-                    toggleLicensedVariableOptions();
+                    // Use setTimeout to let WooCommerce finish its own processing first
+                    setTimeout(toggleLicensedVariableOptions, 100);
                 });
+
+                // Re-apply after WooCommerce AJAX operations that may reset visibility
+                $(document).on('woocommerce_variations_loaded', toggleLicensedVariableOptions);
+                $(document).on('woocommerce_variations_added', toggleLicensedVariableOptions);
+                $(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

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: 0.5.7
+ * Version: 0.5.9
  * 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', '0.5.7');
+define('WC_LICENSED_PRODUCT_VERSION', '0.5.9');
 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__));