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

    public static $identifier = "*n,m,o,p*";

    protected $exclusive;

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

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

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

    public function getExclusive()
    {
        return $this->exclusive;
    }

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

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

    public function checkResult($result, $comperator, $index = null)
    {
        $values = $result->getUserSolutionsByIdentifier("value");
        $exclusive = $this->getExclusive();
        sort($values);
        sort($exclusive);

        switch ($comperator) {
            case "=":
                return $values == $exclusive;
                break;
            case "<>":
                return $values != $exclusive;
                break;
            default:
                return false;
        }
    }
}