Custom option type select - Allow modify list of single selection option types

Author: ihor-sviziev

app/code/Magento/Catalog/Model/Product/Option/Type/Select.php

@@ -30,23 +30,35 @@ class Select extends \Magento\Catalog\Model\Product\Option\Type\DefaultType
      */
     protected $string;
 
+    /**
+     * @var array
+     */
+    private $singleSelectionTypes;
+
     /**
      * @param \Magento\Checkout\Model\Session $checkoutSession
      * @param \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig
      * @param \Magento\Framework\Stdlib\StringUtils $string
      * @param \Magento\Framework\Escaper $escaper
      * @param array $data
+     * @param array $singleSelectionTypes
      */
     public function __construct(
         \Magento\Checkout\Model\Session $checkoutSession,
         \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
         \Magento\Framework\Stdlib\StringUtils $string,
         \Magento\Framework\Escaper $escaper,
-        array $data = []
+        array $data = [],
+        array $singleSelectionTypes = []
     ) {
         $this->string = $string;
         $this->_escaper = $escaper;
         parent::__construct($checkoutSession, $scopeConfig, $data);
+
+        $this->singleSelectionTypes = $singleSelectionTypes ?: [
+            \Magento\Catalog\Api\Data\ProductCustomOptionInterface::OPTION_TYPE_DROP_DOWN,
+            \Magento\Catalog\Api\Data\ProductCustomOptionInterface::OPTION_TYPE_RADIO,
+        ];
     }
 
     /**
@@ -310,10 +322,6 @@ public function getOptionSku($optionValue, $skuDelimiter)
      */
     protected function _isSingleSelection()
     {
-        $single = [
-            \Magento\Catalog\Api\Data\ProductCustomOptionInterface::OPTION_TYPE_DROP_DOWN,
-            \Magento\Catalog\Api\Data\ProductCustomOptionInterface::OPTION_TYPE_RADIO,
-        ];
-        return in_array($this->getOption()->getType(), $single);
+        return in_array($this->getOption()->getType(), $this->singleSelectionTypes, true);
     }
 }

app/code/Magento/Catalog/etc/di.xml

@@ -1164,4 +1164,12 @@
             </argument>
         </arguments>
     </type>
+    <type name="Magento\Catalog\Model\Product\Option\Type\Select">
+        <arguments>
+            <argument name="singleSelectionTypes" xsi:type="array">
+                <item name="drop_down" xsi:type="const">Magento\Catalog\Api\Data\ProductCustomOptionInterface::OPTION_TYPE_DROP_DOWN</item>
+                <item name="radio" xsi:type="const">Magento\Catalog\Api\Data\ProductCustomOptionInterface::OPTION_TYPE_RADIO</item>
+            </argument>
+        </arguments>
+    </type>
 </config>