ilAssLacAnswerOfQuestionExpression.php

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<?php

class ilAssLacAnswerOfQuestionExpression extends ilAssLacAbstractExpression implements ilAssLacQuestionExpressionInterface
{
    //  public static $pattern = '/Q[0-9]+([^\[|0-9]|$)/';
    public static $pattern = '/(Q\d+)(?=\=|<|>|\s|$)/';

    public static $identifier = "Qn";

    protected $question_index;

    protected function setMatches($matches): void
    {
        $this->question_index = $matches[0][0];
    }

    public function getQuestionIndex(): int
    {
        return $this->question_index;
    }

    public function getValue(): string
    {
        return "Q" . $this->question_index;
    }

    public function getDescription(): string
    {
        return "Frage " . $this->question_index . " ";
    }

    protected function getPattern(): string
    {
        return '/-?[0-9]+/';
    }
}