Add AbstractMultiCategoryCondition

diff --git a/wcfsetup/install/files/lib/system/condition/AbstractMultiCategoryCondition.class.php b/wcfsetup/install/files/lib/system/condition/AbstractMultiCategoryCondition.class.php
new file mode 100644 (file)
index 0000000..0b2d42c
--- /dev/null
+++ b/wcfsetup/install/files/lib/system/condition/AbstractMultiCategoryCondition.class.php
@@ -0,0 +1,54 @@
+<?php
+namespace wcf\system\condition;
+use wcf\data\category\CategoryNode;
+use wcf\data\category\CategoryNodeTree;
+use wcf\system\category\CategoryHandler;
+
+/**
+ * Abstract implementation of a condition for selecting multiple categories.
+ * 
+ * @author     Matthias Schmidt
+ * @copyright  2001-2016 WoltLab GmbH
+ * @license    GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @package    com.woltlab.wcf
+ * @subpackage system.condition
+ * @category   Community Framework
+ * @since      2.2
+ */
+abstract class AbstractMultiCategoryCondition extends AbstractMultiSelectCondition {
+       /**
+        * name of the category object type
+        * @var string
+        */
+       public $objectType = '';
+       
+       /**
+        * name of category node tree class
+        * @var string
+        */
+       public $nodeTreeClassname = CategoryNodeTree::class;
+       
+       /**
+        * @inheritDoc
+        */
+       protected function getFieldElement() {
+               $categoryTree = (new $this->nodeTreeClassname($this->objectType))->getIterator();
+               $categoryCount = iterator_count($categoryTree);
+               
+               $fieldElement = '<select name="'.$this->fieldName.'[]" id="'.$this->fieldName.'" multiple="multiple" size="'.($categoryCount >= 10 ? 10 : $categoryCount).'">';
+               /** @var CategoryNode $categoryNode */
+               foreach ($categoryTree as $categoryNode) {
+                       $fieldElement .= "<option value=\"{$categoryNode->categoryID}\"".(in_array($categoryNode->categoryID, $this->fieldValue) ? ' selected="selected"' : '').">".str_repeat("&nbsp;&nbsp;&nbsp;&nbsp;", $categoryNode->getOpenParentNodes()).$categoryNode->getTitle()."</option>";
+               }
+               $fieldElement .= '</select>';
+               
+               return $fieldElement;
+       }
+       
+       /**
+        * @inheritDoc
+        */
+       protected function getOptions() {
+               return CategoryHandler::getInstance()->getCategories($this->objectType);
+       }
+}