ilAssLacOrderingResultExpression.php

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<?php

include_once "Modules/TestQuestionPool/classes/questions/LogicalAnswerCompare/Expressions/ilAssLacAbstractExpression.php";
include_once "Modules/TestQuestionPool/classes/questions/LogicalAnswerCompare/Expressions/ilAssLacSolutionExpressionInterface.php";

class ilAssLacOrderingResultExpression extends ilAssLacAbstractExpression implements ilAssLacSolutionExpressionInterface
{
        public static $pattern = '/\$[0-9]+(?:,[0-9]+)*\$/';

        public static $identifier = '$n,m,o,p$';

        protected $ordering;

        protected function getPattern()
        {
                return '/(\d+)/';
        }

        protected function setMatches($matches)
        {
                $this->ordering = array();

                foreach($matches[0] as $match)
                {
                        $this->ordering[] = $match;
                }
        }

        public function getOrdering()
        {
                return $this->ordering;
        }

        public function getValue()
        {
                return "$" . join(",", $this->ordering) . "$";
        }

        public function getDescription()
        {
                return join(",", $this->ordering) . " beantwortet ";
        }

        public function checkResult($result, $comperator, $index = null)
        {
                $keys = $result->getUserSolutionsByIdentifier("key");
                $keys = array_filter($keys,function($element) {
                                return $element != null;
                });

                switch($comperator)
                {
                        case "=":
                                return $keys == $this->getOrdering();
                                break;
                        case "<>":
                                return $keys != $this->getOrdering();
                                break;
                        default:
                                return false;
                }
        }
}