Fixed faulty media gallery label/description management for mutistore projects

app/code/core/Mage/Adminhtml/Block/Catalog/Product/Helper/Form/Gallery.php

@@ -23,7 +23,6 @@ class Mage_Adminhtml_Block_Catalog_Product_Helper_Form_Gallery extends Varien_Da
 {
     public function getElementHtml()
     {
-        //$html.= $this->getAfterElementHtml();
         return $this->getContentHtml();
     }
 
@@ -66,19 +65,31 @@ public function canDisplayUseDefault($attribute)
     /**
      * Check default value usage fact
      *
-     * @param Mage_Eav_Model_Entity_Attribute $attribute
+     * @param Mage_Eav_Model_Entity_Attribute|string $attribute
      * @return bool
      */
     public function usedDefault($attribute)
     {
-        $attributeCode = $attribute->getAttributeCode();
-        $defaultValue = $this->getDataObject()->getAttributeDefaultValue($attributeCode);
+        if (is_string($attribute)) {
+            $attributeCode = $attribute;
+        } else {
+            $attributeCode = $attribute->getAttributeCode();
+        }
 
+        // special management for "label" and "position" since they're columns of the
+        // catalog_product_entity_media_gallery_value database table
+        if ($attributeCode == "label" || $attributeCode == "position") {
+            $media_gallery = $this->getDataObject()->getMediaGallery();
+            if (!count($media_gallery["images"])) {
+                return true;
+            }
+            return $media_gallery["images"][0]["{$attributeCode}_use_default"];
+        }
+
+        $defaultValue = $this->getDataObject()->getAttributeDefaultValue($attributeCode);
         if (!$this->getDataObject()->getExistsStoreValueFlag($attributeCode)) {
             return true;
-        } elseif ($this->getValue() == $defaultValue &&
-                   $this->getDataObject()->getStoreId() != $this->_getDefaultStoreId()
-        ) {
+        } elseif ($this->getValue() == $defaultValue && $this->getDataObject()->getStoreId() != $this->_getDefaultStoreId()) {
             return false;
         }
         if ($defaultValue === false && !$attribute->getIsRequired() && $this->getValue()) {

app/code/core/Mage/Adminhtml/controllers/Catalog/ProductController.php

@@ -579,9 +579,6 @@ protected function _initProductSave()
             $this->_filterStockData($productData['stock_data']);
         }
 
-        /**
-         * Websites
-         */
         if (!isset($productData['website_ids'])) {
             $productData['website_ids'] = [];
         }

app/code/core/Mage/Catalog/Model/Product/Attribute/Backend/Media.php

@@ -43,7 +43,10 @@ public function afterLoad($object)
         foreach ($this->_getResource()->loadGallery($object, $this) as $image) {
             foreach ($localAttributes as $localAttribute) {
                 if (is_null($image[$localAttribute])) {
+                    $image[$localAttribute . '_use_default'] = true;
                     $image[$localAttribute] = $this->_getDefaultValue($localAttribute, $image);
+                } else {
+                    $image[$localAttribute . '_use_default'] = false;
                 }
             }
             $value['images'][] = $image;
@@ -107,6 +110,10 @@ public function beforeSave($object)
             $value['images'] = Mage::helper('core')->jsonDecode($value['images']);
         }
 
+        if (!is_array($value['values']) && strlen($value['values']) > 0) {
+            $value['values'] = Mage::helper('core')->jsonDecode($value['values']);
+        }
+
         if (!is_array($value['images'])) {
             $value['images'] = [];
         }
@@ -157,21 +164,19 @@ public function beforeSave($object)
             if (in_array($attrData, $clearImages)) {
                 $object->setData($mediaAttrCode, 'no_selection');
             }
+        }
 
+        foreach ($value['values'] as $mediaAttrCode => $attrData) {
             if (array_key_exists($attrData, $newImages)) {
-                $object->setData($mediaAttrCode, $newImages[$attrData]['new_file']);
-                $object->setData($mediaAttrCode . '_label', $newImages[$attrData]['label']);
+                $object->setData($mediaAttrCode . '_label', ($newImages[$attrData]['label'] === null || $newImages[$attrData]['label_use_default']) ? $newImages[$attrData]['label_default'] : $newImages[$attrData]['label']);
             }
 
             if (array_key_exists($attrData, $existImages)) {
-                $object->setData($mediaAttrCode . '_label', $existImages[$attrData]['label']);
+                $object->setData($mediaAttrCode . '_label', ($existImages[$attrData]['label'] === null || $existImages[$attrData]['label_use_default']) ? $existImages[$attrData]['label_default'] : $existImages[$attrData]['label']);
             }
         }
-
         Mage::dispatchEvent('catalog_product_media_save_before', ['product' => $object, 'images' => $value]);
-
         $object->setData($attrCode, $value);
-
         return $this;
     }
 
@@ -204,7 +209,6 @@ public function afterSave($object)
         }
 
         $storeId = $object->getStoreId();
-
         $storeIds = $object->getStoreIds();
         $storeIds[] = Mage_Core_Model_App::ADMIN_STORE_ID;
 
@@ -243,8 +247,8 @@ public function afterSave($object)
             // Add per store labels, position, disabled
             $data = [];
             $data['value_id'] = $image['value_id'];
-            $data['label']    = $image['label'];
-            $data['position'] = (int) $image['position'];
+            $data['label']    = ($image['label'] === null || $image["label_use_default"]) ? null : $image['label'];
+            $data['position'] = ($image['position'] === null || $image["position_use_default"]) ? null : (int) $image['position'];
             $data['disabled'] = (int) $image['disabled'];
             $data['store_id'] = (int) $object->getStoreId();