Process only required attributes in api/rest/products/

app/code/core/Mage/Api2/Helper/Data.php

@@ -139,7 +139,7 @@ public function isApiTypeSupported($type)
      *
      * @param string $userType
      * @param string $resourceId
-     * @param string $operation One of Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_... constant
+     * @param Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_* $operation
      * @return array
      */
     public function getAllowedAttributes($userType, $resourceId, $operation)
@@ -169,8 +169,8 @@ public function isAllAttributesAllowed($userType)
     /**
      * Get operation type for specified operation
      *
-     * @param string $operation One of Mage_Api2_Model_Resource::OPERATION_... constant
-     * @return string One of Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_... constant
+     * @param Mage_Api2_Model_Resource::OPERATION_* $operation
+     * @return Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_*
      * @throws Exception
      */
     public function getTypeOfOperation($operation)

app/code/core/Mage/Api2/Model/Acl/Filter.php

@@ -99,7 +99,7 @@ public function collectionOut($items)
     /**
      * Fetch array of allowed attributes for given resource type, operation and user type.
      *
-     * @param string $operationType OPTIONAL One of Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_... constant
+     * @param Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_* $operationType OPTIONAL
      * @return array
      */
     public function getAllowedAttributes($operationType = null)

app/code/core/Mage/Api2/Model/Config.php

@@ -272,7 +272,7 @@ public function getResourceForcedAttributes($resource, $userType)
      *
      * @param string $resource API resource ID
      * @param string $userType API user type
-     * @param string $operationType Type of operation: one of Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_... constant
+     * @param Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_* $operationType
      * @return array
      */
     public function getResourceIncludedAttributes($resource, $userType, $operationType)
@@ -295,7 +295,7 @@ public function getResourceIncludedAttributes($resource, $userType, $operationTy
      *
      * @param string $resource API resource ID
      * @param string $userType API user type
-     * @param string $operationType Type of operation: one of Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_... constant
+     * @param Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_* $operationType
      * @return array
      */
     public function getResourceEntityOnlyAttributes($resource, $userType, $operationType)

app/code/core/Mage/Api2/Model/Resource.php

@@ -147,16 +147,12 @@ abstract class Mage_Api2_Model_Resource
     protected $_userType;
 
     /**
-     * One of Mage_Api2_Model_Resource::ACTION_TYPE_... constant
-     *
-     * @var string
+     * @var Mage_Api2_Model_Resource::ACTION_TYPE_*
      */
     protected $_actionType;
 
     /**
-     * One of Mage_Api2_Model_Resource::OPERATION_... constant
-     *
-     * @var string
+     * @var Mage_Api2_Model_Resource::OPERATION_*
      */
     protected $_operation;
 
@@ -524,7 +520,7 @@ public function setApiUser(Mage_Api2_Model_Auth_User_Abstract $apiUser)
      * Get action type
      * If not exists get from Request
      *
-     * @return string One of Mage_Api2_Model_Resource::ACTION_TYPE_... constant
+     * @return self::ACTION_TYPE_*
      */
     public function getActionType()
     {
@@ -537,7 +533,7 @@ public function getActionType()
     /**
      * Set route type
      *
-     * @param string $actionType One of Mage_Api2_Model_Resource::ACTION_TYPE_... constant
+     * @param self::ACTION_TYPE_* $actionType
      * @return $this
      */
     public function setActionType($actionType)
@@ -550,7 +546,7 @@ public function setActionType($actionType)
      * Get operation
      * If not exists get from Request
      *
-     * @return string One of Mage_Api2_Model_Resource::OPERATION_... constant
+     * @return self::OPERATION_*
      */
     public function getOperation()
     {
@@ -563,7 +559,7 @@ public function getOperation()
     /**
      * Set operation
      *
-     * @param string $operation One of Mage_Api2_Model_Resource::OPERATION_... constant
+     * @param self::OPERATION_* $operation
      * @return $this
      */
     public function setOperation($operation)
@@ -942,7 +938,7 @@ public function getForcedAttributes()
      * Retrieve list of included attributes
      *
      * @param string $userType API user type
-     * @param string $operationType Type of operation: one of Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_... constant
+     * @param Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_* $operationType
      * @return array
      */
     public function getIncludedAttributes($userType, $operationType)
@@ -954,7 +950,7 @@ public function getIncludedAttributes($userType, $operationType)
      * Retrieve list of entity only attributes
      *
      * @param string $userType API user type
-     * @param string $operationType Type of operation: one of Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_... constant
+     * @param Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_* $operationType
      * @return array
      */
     public function getEntityOnlyAttributes($userType, $operationType)

app/code/core/Mage/Api2/Model/Resource/Acl/Filter/Attribute.php

@@ -35,7 +35,7 @@ protected function _construct()
     /**
      * @param string $userType
      * @param string $resourceId
-     * @param string $operation One of Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_... constant
+     * @param Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_* $operation
      * @return string|bool|null
      */
     public function getAllowedAttributes($userType, $resourceId, $operation)

app/code/core/Mage/Catalog/Model/Api2/Product/Rest.php

@@ -29,6 +29,8 @@ abstract class Mage_Catalog_Model_Api2_Product_Rest extends Mage_Catalog_Model_A
      */
     protected $_product;
 
+    protected ?array $allowedAttributes = null;
+
     /**
      * Retrieve product data
      *
@@ -100,46 +102,22 @@ protected function _applyCategoryFilter(Mage_Catalog_Model_Resource_Product_Coll
      */
     protected function _prepareProductForResponse(Mage_Catalog_Model_Product $product)
     {
-        /** @var Mage_Catalog_Helper_Product $productHelper */
-        $productHelper = Mage::helper('catalog/product');
         $productData = $product->getData();
         $product->setWebsiteId($this->_getStore()->getWebsiteId());
         // customer group is required in product for correct prices calculation
         $product->setCustomerGroupId($this->_getCustomerGroupId());
-        // calculate prices
-        $finalPrice = $product->getFinalPrice();
-        $productData['regular_price_with_tax'] = $this->_applyTaxToPrice($product->getPrice(), true);
-        $productData['regular_price_without_tax'] = $this->_applyTaxToPrice($product->getPrice(), false);
-        $productData['final_price_with_tax'] = $this->_applyTaxToPrice($finalPrice, true);
-        $productData['final_price_without_tax'] = $this->_applyTaxToPrice($finalPrice, false);
 
-        $productData['is_saleable'] = $product->getIsSalable();
-        $productData['image_url'] = (string) Mage::helper('catalog/image')->init($product, 'image');
+        $this->addAttribute('image_url', $productData, $product);
+        $this->addAttribute('is_saleable', $productData, $product);
+        $this->addPrices($productData, $product);
 
         if ($this->getActionType() == self::ACTION_TYPE_ENTITY) {
-            // define URLs
-            $productData['url'] = $productHelper->getProductUrl($product->getId());
-            /** @var Mage_Checkout_Helper_Cart $cartHelper */
-            $cartHelper = Mage::helper('checkout/cart');
-            $productData['buy_now_url'] = $cartHelper->getAddUrl($product);
-
-            $stockItem = $product->getStockItem();
-            if (!$stockItem) {
-                $stockItem = Mage::getModel('cataloginventory/stock_item');
-                $stockItem->loadByProduct($product);
-            }
-            $productData['is_in_stock'] = $stockItem->getIsInStock();
-
-            /** @var Mage_Review_Model_Review $reviewModel */
-            $reviewModel = Mage::getModel('review/review');
-            $productData['total_reviews_count'] = $reviewModel->getTotalReviews(
-                $product->getId(),
-                true,
-                $this->_getStore()->getId(),
-            );
-
-            $productData['tier_price'] = $this->_getTierPrices();
-            $productData['has_custom_options'] = count($product->getOptions()) > 0;
+            $this->addAttribute('buy_now_url', $productData, $product);
+            $this->addAttribute('has_custom_options', $productData, $product);
+            $this->addAttribute('is_in_stock', $productData, $product);
+            $this->addAttribute('tier_price', $productData, $product);
+            $this->addAttribute('total_reviews_count', $productData, $product);
+            $this->addAttribute('url', $productData, $product);
         } else {
             // remove tier price from response
             $product->unsetData('tier_price');
@@ -148,6 +126,114 @@ protected function _prepareProductForResponse(Mage_Catalog_Model_Product $produc
         $product->addData($productData);
     }
 
+    /**
+     * Add custom attributes to product data
+     *
+     * Apply custom logig before add data to product.
+     */
+    protected function addAttribute(string $attribute, array &$productData, Mage_Catalog_Model_Product $product): void
+    {
+        if (!$this->isAllowedAttribute($attribute)) {
+            return;
+        }
+
+        switch ($attribute) {
+            case 'buy_now_url':
+                /** @var Mage_Checkout_Helper_Cart $cartHelper */
+                $cartHelper = Mage::helper('checkout/cart');
+                $productData[$attribute] = $cartHelper->getAddUrl($product);
+                break;
+            case 'has_custom_options':
+                $productData[$attribute] = count($product->getOptions()) > 0;
+                break;
+            case 'image_url':
+                $productData[$attribute] = (string) Mage::helper('catalog/image')->init($product, 'image');
+                break;
+            case 'is_in_stock':
+                $stockItem = $product->getStockItem();
+                if (!$stockItem) {
+                    $stockItem = Mage::getModel('cataloginventory/stock_item');
+                    $stockItem->loadByProduct($product);
+                }
+                $productData[$attribute] = $stockItem->getIsInStock();
+                break;
+            case 'is_saleable':
+                $productData[$attribute] = $product->getIsSalable();
+                break;
+            case 'tier_price':
+                $productData[$attribute] = $this->_getTierPrices();
+                break;
+            case 'total_reviews_count':
+                /** @var Mage_Review_Model_Review $reviewModel */
+                $reviewModel = Mage::getModel('review/review');
+                $productData[$attribute] = $reviewModel->getTotalReviews(
+                    $product->getId(),
+                    true,
+                    $this->_getStore()->getId(),
+                );
+                break;
+            case 'url':
+                $productData[$attribute] = $product->getProductUrl();
+                break;
+        }
+    }
+
+    /**
+     * Add price attributes to product data
+     */
+    protected function addPrices(array &$productData, Mage_Catalog_Model_Product $product): void
+    {
+        $isPriceRequired = false;
+        if ($this->isAllowedAttribute('regular_price_with_tax') ||
+            $this->isAllowedAttribute('regular_price_without_tax') ||
+            $this->isAllowedAttribute('final_price_with_tax') ||
+            $this->isAllowedAttribute('final_price_without_tax')
+        ) {
+            $isPriceRequired = true;
+        }
+
+        // calculate prices
+        if ($isPriceRequired) {
+            $finalPrice = $product->getFinalPrice();
+            if ($this->isAllowedAttribute('regular_price_with_tax')) {
+                $productData['regular_price_with_tax'] = $this->_applyTaxToPrice($product->getPrice(), true);
+            }
+            if ($this->isAllowedAttribute('regular_price_without_tax')) {
+                $productData['regular_price_without_tax'] = $this->_applyTaxToPrice($product->getPrice(), false);
+            }
+            if ($this->isAllowedAttribute('final_price_with_tax')) {
+                $productData['final_price_with_tax'] = $this->_applyTaxToPrice($finalPrice, true);
+            }
+            if ($this->isAllowedAttribute('final_price_without_tax')) {
+                $productData['final_price_without_tax'] = $this->_applyTaxToPrice($finalPrice, false);
+            }
+        }
+    }
+
+    /**
+     * Get allowed attributes for output
+     */
+    /**
+     * @return string[]
+     */
+    protected function getAllowedAttributes(): array
+    {
+        if (is_null($this->allowedAttributes)) {
+            $attributes = Mage::helper('api2')->getAllowedAttributes(
+                $this->getUserType(),
+                'product',
+                Mage_Api2_Model_Resource::OPERATION_ATTRIBUTE_READ,
+            );
+            $this->allowedAttributes = $attributes;
+        }
+        return $this->allowedAttributes;
+    }
+
+    protected function isAllowedAttribute(string $attribute): bool
+    {
+        return in_array($attribute, $this->getAllowedAttributes());
+    }
+
     /**
      * Product create only available for admin
      */