Add licensed variable product support for duration-based licenses (v0.5.3)

Customers can now purchase licenses with different durations (monthly,
yearly, lifetime) through WooCommerce product variations. Each variation
can have its own license validity settings.

New features:
- LicensedVariableProduct class for variable licensed products
- LicensedProductVariation class for individual variations
- Per-variation license duration and max activations settings
- Duration labels in checkout (Monthly, Quarterly, Yearly, etc.)
- Full support for WooCommerce Blocks checkout with variations
- Updated translations for German (de_CH)

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

src/License/LicenseManager.php

@@ -11,12 +11,43 @@ namespace Jeremias\WcLicensedProduct\License;
 
 use Jeremias\WcLicensedProduct\Installer;
 use Jeremias\WcLicensedProduct\Product\LicensedProduct;
+use Jeremias\WcLicensedProduct\Product\LicensedProductVariation;
+use Jeremias\WcLicensedProduct\Product\LicensedVariableProduct;
 
 /**
  * Manages license operations (CRUD, validation, generation)
  */
 class LicenseManager
 {
+    /**
+     * Check if a product is any type of licensed product
+     *
+     * @param \WC_Product $product Product to check
+     * @return bool True if product is licensed (simple or variable or variation)
+     */
+    public function isLicensedProduct(\WC_Product $product): bool
+    {
+        // Simple licensed product
+        if ($product->is_type('licensed')) {
+            return true;
+        }
+
+        // Variable licensed product
+        if ($product->is_type('licensed-variable')) {
+            return true;
+        }
+
+        // Variation of a licensed-variable product
+        if ($product->is_type('variation') && $product->get_parent_id()) {
+            $parent = wc_get_product($product->get_parent_id());
+            if ($parent && $parent->is_type('licensed-variable')) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     /**
      * Generate a unique license key
      */
@@ -40,32 +71,63 @@ class LicenseManager
 
     /**
      * Generate a license for a completed order
+     *
+     * @param int $orderId Order ID
+     * @param int $productId Product ID (parent product for variations)
+     * @param int $customerId Customer ID
+     * @param string $domain Domain to bind the license to
+     * @param int|null $variationId Optional variation ID for variable licensed products
+     * @return License|null Generated license or null on failure
      */
     public function generateLicense(
         int $orderId,
         int $productId,
         int $customerId,
-        string $domain
+        string $domain,
+        ?int $variationId = null
     ): ?License {
         global $wpdb;
 
         // Normalize domain first for duplicate detection
         $normalizedDomain = $this->normalizeDomain($domain);
 
-        // Check if license already exists for this order, product, and domain
-        $existing = $this->getLicenseByOrderProductAndDomain($orderId, $productId, $normalizedDomain);
+        // Check if license already exists for this order, product, domain, and variation
+        $existing = $this->getLicenseByOrderProductDomainAndVariation($orderId, $productId, $normalizedDomain, $variationId);
         if ($existing) {
             return $existing;
         }
 
-        $product = wc_get_product($productId);
-        if (!$product || !$product->is_type('licensed')) {
-            return null;
+        // Load the product that has the license settings
+        // 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
+            if (!$parentProduct || !$parentProduct->is_type('licensed-variable')) {
+                return null;
+            }
+
+            // Ensure we have the proper variation class
+            if ($settingsProduct && !$settingsProduct instanceof LicensedProductVariation) {
+                $settingsProduct = new LicensedProductVariation($variationId);
+            }
+        } else {
+            $settingsProduct = wc_get_product($productId);
+
+            // Check if this is a licensed product (simple)
+            if (!$settingsProduct || !$settingsProduct->is_type('licensed')) {
+                return null;
+            }
+
+            // Ensure we have the LicensedProduct instance for type hints
+            if (!$settingsProduct instanceof LicensedProduct) {
+                $settingsProduct = new LicensedProduct($productId);
+            }
         }
 
-        // Ensure we have the LicensedProduct instance for type hints
-        if (!$product instanceof LicensedProduct) {
-            $product = new LicensedProduct($productId);
+        if (!$settingsProduct) {
+            return null;
         }
 
         // Generate unique license key
@@ -74,16 +136,16 @@ class LicenseManager
             $licenseKey = $this->generateLicenseKey();
         }
 
-        // Calculate expiration date
+        // Calculate expiration date from the settings product (variation or parent)
         $expiresAt = null;
-        $validityDays = $product->get_validity_days();
+        $validityDays = $settingsProduct->get_validity_days();
         if ($validityDays !== null && $validityDays > 0) {
             $expiresAt = (new \DateTimeImmutable())->modify("+{$validityDays} days")->format('Y-m-d H:i:s');
         }
 
-        // Determine version ID if bound to version
+        // Determine version ID if bound to version (always use parent product ID for versions)
         $versionId = null;
-        if ($product->is_bound_to_version()) {
+        if ($settingsProduct->is_bound_to_version()) {
             $versionId = $this->getCurrentVersionId($productId);
         }
 
@@ -99,7 +161,7 @@ class LicenseManager
                 'version_id' => $versionId,
                 'status' => License::STATUS_ACTIVE,
                 'activations_count' => 1,
-                'max_activations' => $product->get_max_activations(),
+                'max_activations' => $settingsProduct->get_max_activations(),
                 'expires_at' => $expiresAt,
             ],
             ['%s', '%d', '%d', '%d', '%s', '%d', '%s', '%d', '%d', '%s']
@@ -112,6 +174,16 @@ class LicenseManager
         return $this->getLicenseById((int) $wpdb->insert_id);
     }
 
+    /**
+     * Get license by order, product, domain, and optional variation
+     */
+    public function getLicenseByOrderProductDomainAndVariation(int $orderId, int $productId, string $domain, ?int $variationId = null): ?License
+    {
+        // For now, just use the existing method since we don't store variation_id in licenses table yet
+        // In the future, we could add a variation_id column to the licenses table
+        return $this->getLicenseByOrderProductAndDomain($orderId, $productId, $domain);
+    }
+
     /**
      * Get license by ID
      */